In the electronics industry, solder wire is a common soldering material. Solder wire is divided into solder wires of different grades, different price points and different effects according to the tin content. However, the soldering material determines the soldering effect. Good or bad. In the selection of many solder wires, many users do not know how to choose, then how do we know the quality of solder wire? The following staff from Shenzhen Xinghongtai manufacturers introduce to you:

First, the reliability of solder joints

The reliability of solder joints after solder wire soldering is also one of the criteria for selection. It is necessary to select a corresponding product that satisfies the use according to the use characteristics of the product. Just like some lead-free solder wires, the reliability of solder joints after soldering is very poor at high temperatures, but the reliability is generally 200 °C at a certain temperature. In fact, many electronic products that need to be reworked must withstand 200 °C or higher. High temperature. Choosing the right solder wire will give the electronic product a good result.

Second, the gloss color

This is directly related to the quality level of the solder wire and the amount of tin. Glossy color not only affects the appearance but also affects the quality of the weld. The luster color is bright and dazzling. The tin content must be high, and the welding effect is good. Otherwise, the welding effect will be bad, and even a matt color or a whitish color may appear, which is not a normal shiny color.

Third, the amount of tin

What is the tin content of the solder wire? This is the most important part and the only criterion for judging the solder wire grade. It is also related to important factors such as welding effect, firmness, reliability, and electrical conductivity. When using leaded solder wire, we must use the tin content of the solder wire that meets the requirements of the product. Otherwise, the soldering quality will have different degrees of problems. The amount of tin contained can not be discerned by the eyes, and can only be known by testing. There are also many detection methods, such as: spectrum detector, weight specific gravity method, chemical titration method, and the like. There is usually no such testing equipment in the electronics factory, leaving a lot of leaks.

Fourth, packaging

Pay attention to the appearance of the solder wire package. Although the appearance of the package does not represent the quality, the solder wire produced by the regular manufacturer will have a corresponding detailed mark. If there is a quality problem, it can be better verified. In the product identification, the basic information of the solder wire such as tin content or degree, lead content, flux amount, melting point and package weight should be indicated.

The above how we can distinguish the quality of the solder wire is introduced here, the convenience and operability of the solder wire is very suitable for the manual soldering needs of the public. You can understand the amount of tin contained in the solder wire we mentioned last time.

Solder wire is a kind of welding material. Its function is mainly used for micro-joining or repair welding of components such as components, PCB boards or pipes. It is one of the key products to ensure product quality. The preparation of solder wire is relatively complicated, and the process control is strict, including: smelting, casting, extrusion, rough drawing, fine drawing and wire winding, etc. How to ensure the uniformity of flux in the tin wire and avoid the defect of broken rosin is the whole tin wire The most critical process in the process. So what are the common problems when soldering wire is soldered? The following is a small series by Shenzhen Xinghongtai manufacturer: 

Due to improper process, the following problems are often encountered when soldering wire is used:

Icicle (tip)

Reasons: (1) uneven temperature conduction; (2) poor solderability of PCB or parts; (3) large variations in solder composition.

Poor weld 

Reasons: (1) external pollution; (2) insufficient activity of tin wire flux (3). rosin inside the wire; (4) severe oxidation of components

Tin ball

Reasons: (1) The water content in the tin wire flux is too high; (2) the flux in the tin wire is discontinuous, and there is a problem of broken rosin; (3) the ambient humidity is too high.

cold welding.

(1) The soldering iron temperature is too low; (2) The soldering time is short.

When using lead-free solder wire, the tip is consumed quickly. The reason is that the material of the tip is mainly iron or copper, which reacts with the solder. With lead-free solder, the solder composition changes from 60% tin to almost pure tin, and the probability of reaction increases. In addition, the melting point of lead-free solder is high, the wettability is poor, and it is necessary to increase the operating temperature and prolong the contact time. The loss of the tip naturally increases a lot.

The common problems of soldering the above solder wire are shared here. Solder is the electrical connection between the electronic component and the PCB board or the electrical connection between the electronic component and the electronic component. You can combine the last time we mentioned how Use solder wire together to understand.

With the continuous development of society, more and more electronic industries have also developed rapidly. Solder bars are the most commonly used solder materials in the electronics industry. Maybe you don't know about solder bars, so there are several types of solder bars. Kind of? The following staff from Shenzhen Xinghongtai factory introduced to you:

1. According to the presence or absence of lead, the solder bars are divided into the following two types:

Lead solder bar: An alloy consisting of tin and lead with a melting point of 183 degrees.

2. Lead-free solder bar: made of tin-copper alloy. Common lead-free environmentally friendly solders are tin-copper (Sn-0.7Cu), tin-silver-copper (Sn-0.3Ag-0.5Cu), tin-silver-copper (Sn-3.0Ag-0.5Cu), depending on the composition.

Second, according to the liquidus temperature critical point, the solder bar has high temperature solder bar and low temperature solder bar.

The solder bar with a liquidus temperature higher than the tin-lead eutectic melting point-183 degrees is a high-temperature solder bar, and the high-temperature solder bar is a solder bar formed when a silver, germanium or lead ratio is added to the solder alloy, and the high-temperature solder bar is formed. It is mainly used for assembly of components that do not change when the motherboard is assembled; the liquidus temperature is lower than the tin-lead eutectic melting point - the solder bar of 183 degrees is a low-temperature solder bar, and the low-temperature solder bar is added with germanium and indium in the solder alloy. Solder bars formed of cadmium are mainly used for assembly of parts with low heat resistance such as microelectronic sensors.

Third, according to chemical properties, commonly used solder bar types are anti-oxidation solder bars and high-purity low-slag solder bars.

High-purity low-slag solder bar: The raw material used is 100% electrolytic tin, lead or tin-lead alloy. Cast or extruded by casting. Therefore, it promotes its stable high-heavy, ultra-low slag and high wettability, making it adaptable to various welding processes.

Anti-oxidation solder bar: It has good anti-oxidation ability, high fluidity, strong weldability, little scum during melting, and little oxidation in immersion and wave soldering. It is an economical solder bar that saves tin. Excellent wettability and weldability, full and uniform solder joints, good soldering effect.

There are several types of solder bars mentioned above. The solder strips are made of high-purity tin raw materials from Yunnan Tin Mine, which are fused with electrolytic copper, with special manufacturing methods and high-standard production processes.

Too much rosin in the solder wire will not cause a short circuit: the solution, the solder wire rosin does not have to cause conduction. It is itself an insulator, but the content of the solder wire auxiliaries is rich in rosin but there are other active substances. Excessive metering of some active substances may constitute leakage. After soldering in many electronics factories, it is necessary to use a cleaning agent to clean the external factors to remove the solder residue to ensure the safety of the electronic board.

Welded by dip soldering, the solder wire has a white dirty mark on the terminal after soldering, which is difficult to remove. I want to know if there is any way to deal with the dirty imprint after soldering: solution, to get rid of the dirt To understand how the dirt is produced is the cockroach material so that we can be removed from the roots. From the above doubts, it can be determined that the dirt is self-service flux.

It is generally considered that the flux of the flux is cleaned with a cleaning agent, but the terminal cleaning agent for the wiring cannot be thoroughly cleaned and damages the terminal. The best method is to wipe with industrial alcohol. How does the flux foam? Solution: Flux foaming requires a higher flux ratio. Pour the flux into the foaming tank and put it into the air compressor to use the air as a power. The flux is propelled by the gas to promote the appearance of the flux, which will form a foam. Its function is to reduce the excessive connection between the solder and the flux, and to ensure the appearance of the welding is neat.

Solder wire application temperature is usually 450 degrees, beyond this temperature will be a glimpse: solution, high solder bar is a cooperative electronic original equipment welding under high temperature conditions, its heating temperature is between 400-500 degrees, when surpassing this temperature The surface oxide of the high temperature solder bar is added agilely. The feeling of tin liquid is always unclean, and the tin surface will appear blue.

The quality of the solder wire directly affects the quality of the solder. Xing Hongtai teaches you how to judge the quality of the solder wire. The quality of the solder wire can be judged according to the gloss of the solder joint. If the solder joints are white, it is clear that the lead content of the solder wire is large and the quality of the solder wire is poor.

For example, if the solder joint of 40-degree solder wire is whitish in a small part of the center, the nearby bright spot accounts for 70%-80% of all solder joints; and the solder joint center of 35-degree solder wire occupies 60%-65% of all solder joints. The vicinity of the shiny accounted for 35%-40% of all solder joints; the 30-degree solder wire solder joint center whited accounted for 80% of all solder joints, as long as the nearby bottom edge is lit; and the 45-degree solder wire solder joint It is completely bright as long as the top accounts for 5%-10% of all solder joints. Therefore, if the area of the center of the solder wire is whitish, the quality of the solder wire is deteriorated.

If you are based on professional skills, you should use a professional German imported spectrometer to check the accuracy of 0.001%. Further, the solder wire can be judged based on the insulation resistance, the expansion ratio, and the wetting function. Lead-free solder wire is judged according to ROHS specifications, flux residue, halogen-free, and tin-on speed. Smoke, splash, residue, and brightness are also specifications for judging the quality of solder wire. Therefore, in the selection of solder wire, it is best to use a soldering manufacturer with a good reputation and a good comparison. Some unscrupulous dealers often use low-quality solder wire to fill the height of the solder wire, so the price is cheaper. When purchasing solder wire, it must be greedy and cheap.

As we all know, solder wire is a kind of solder material commonly used in the electronics industry. Solder wire is mainly used for soldering electronic components, such as soldering of circuit board capacitors, ICs, resistors and other components. During the welding process, we will encounter some things splashing. Some people may not know what the situation is. Now Xiaobian tells you that it is the reason for the rosin splash. What is the reason for the rosin splash when soldering wire? Today is Shenzhen The technical staff of Xinghongtai manufacturers introduce to you:

1, the temperature of the solder wire is too high

The melting point of the solder wire is generally about 227 degrees, so the temperature of the soldering iron is generally adjusted to 280 degrees - 300 degrees. If the temperature of your soldering iron is higher than 300 degrees, then there will be a bad phenomenon of solder wire splashing rosin. At this time, you should know how to control the temperature when using the solder wire, and then adjust the temperature again.

2, the quality of solder wire

The quality of the solder wire is not good. If you use the rosin flux containing moisture and the recycled tin, you will see the phenomenon of splashing rosin or tin. If the situation of frying tin or splashing rosin occurs too frequently, then you should consider changing the supplier.

3, rosin has a technical problem

For example, the rosin is not sufficiently stirred evenly, causing fine pores in the rosin when the liquid is viscous, and pressing into the extruder causes fine bubbles in individual places in the line.

4, the solder wire should be placed in a cool and ventilated place

If the place where the solder wire is placed is dark or damp, it will be easily damp after being placed for a long time. If it is wet, it will definitely appear to be splashed with rosin or tin. There is also solder wire that can't be placed for too long. In general, it is safer to use it within 3 months.

5, the problem of the extrusion process

When the rosin pen is installed in the extrusion process, it starts to be squeezed when it is not in the top position. At this time, it is suspected that the oil stain on the surface of the rosin pen or the tin column will infiltrate and cause splashing. When solders of different compositions, especially lead solder, do not adjust the amount of rosin, the proportion of rosin is high.

The reason why the rosin splash is above the solder wire is shared here. When the rosin splash is encountered during welding, the productivity of the employee will be affected, so everyone must pay attention.

For some electronics industries, solder wire is a common solder material. Solder wire is divided into lead solder wire and lead-free solder wire. The price of a roll of solder wire is composed of several aspects. Maybe everyone doesn't know about solder wire, so what is the difference between the price of lead-free solder and lead solder? The following is the technical staff of Shenzhen Xinghongtai manufacturer:

The lead-free tin bar composition is synthesized from tin, copper and silver, and the commonly used component is Sn99.3Cu0.7. Lead-free tin bars (EU ROHS standards are less than 1000 PPM, and Japanese standards are less than 500 PPM). Lead-free tin bar melting point: 227 °.

The 6337 with lead solder has a better effect, namely 63% tin and 37% lead, and has a low melting point of 183 °C. However, because lead solder is harmful to the human body when it is used in home appliances, the use of lead solder has been banned for a long time in Europe, and there is a lead-free solder in the back.

At present, most domestic manufacturers are using lead-free solder.

There are many kinds of lead-free solders, such as tin-silver-copper alloy, tin-copper alloy, tin-copper-nickel alloy, etc. At present, the lead-free solder which is better in replacing 6337 is tin-silver-copper alloy. The price of lead-free solder wire is high, and it is high in technology and raw materials. It is technically resistant to oxidation, moisture, etc. The price of silver alone does not need to be known. The advantage of lead-free solder is that it is less polluting to the environment, and it is not dangerous to the human body. It is in line with China's requirements for sustainable development.

In the case of tin bars, the price of such metal industrial products is not so certain. The price of lead-free tin bars made with good tin No. 1 should be above 160 yuan/kg.

Lead-free solder wire has a low melting point but is not environmentally friendly, while lead-free solder wire is the opposite. In terms of price, there is a cheaper lead, and it is more expensive than lead. These two are mainly different in lead content. The market is mainly tin-copper, tin-silver, tin-copper-nickel, tin-bismuth low-temperature, tin-bismuth high-temperature, and different alloys have different content ratios.

As we all know, solder wire is a kind of soldering material commonly used in the electronics industry. We use solder flux to achieve the desired effect. Rosin is the most commonly used flux. It is neutral and will not corrode circuit components and Tips. A solder wire without an additive is not capable of soldering an electronic component because it does not have wettability and expandability. So what is the role of adding rosin to the solder wire? The following staff from Shenzhen Xinghongtai factory introduce you:

For ordinary welding of rosin-containing solder wire, it will be better welded. Rosin is very useful for the smoothness of welding. It can make tin droplets stick to the circuit board quickly during soldering. Rosin can also remove oxides on the metal surface to help the diffusion of tin. In solder joints, it can be connected. Parts, do not support mechanical force; coordinate heat dissipation; and electrical conduction, so from these aspects, rosin is very helpful for ordinary welding requirements.

The main role is to help the welding, the usage is: 1. Dip the solder with a hot soldering iron 2. Dip the rosin with a hot soldering iron 3. Solder with a soldering iron with rosin and solder. One and two steps can be cycled.

The biggest advantage of rosin is: tin on the wire, because if it is not rosin, it is difficult to tin the wire, first heat the soldering iron, then put the soldering iron in the rosin, take out the soldering iron, stain the tin, then put it In the rosin, then put the wire to be tinned in, so that the tin is much easier. The other function is to put the newly bought electric soldering iron into the rosin, then put on the tin, put the whole electric soldering iron head on the tin, and then use the tin after the soldering iron is used. Wait until the next time you use the electric soldering iron. Because the soldering iron is not oxidized, it is not easy to use.

Rosin solder wire identification method:

Look at the cross section of the solder wire, is the mouth of the solder wire broken is not hollow, the white powder inside is rosin, but it is not clear, there is a hole basically. There is also a test on the discharge soldering iron, and there is a special smell of white smoke.

The addition of rosin to the above solder wire has been shared here. Adding rosin can help to weld a satisfactory solder joint shape and maintain the surface gloss of the solder joint. You can learn about the operation of the solder wire we mentioned last time.

In electronic and electrical products, solder wire is one of the least indispensable connecting materials, with an average annual consumption of around 100,000 tons. When welding with solder wire, we should effectively control the temperature so that the solder wire has a good soldering effect.

We usually say that solder refers to tin-lead or tin-silver-copper solder alloy. Under normal circumstances, the melting point of tin is 231.9 ° C, the melting of lead is 327.502 ° C, the melting point of copper is: 1084 ° C, the melting point of silver is: 960.8 °C.

In general, the melting point of the tin bar alloy is lower than the melting point of any one of the constituent metals. Taking lead solder (63% tin content, 37% lead content) as an example, the melting point of the formed lead solder is about 183 °C. The lead-free solder melting point is (tin 99.3%, copper 0.7%) around 220 °C.

In order to meet the requirements of some special solder high melting point and high temperature products, our company has specially introduced high temperature soldering strips, the operating temperature can be maintained at 400 °C-500 °C, the solder surface is bright, static at 400 °C ± 10 °C for 12 hours, keep the mirror Does not change color. The amount of slag is only about 1/7 of that of ordinary solder. It is suitable for wave soldering and hot dip soldering. It is especially suitable for the tin-solding of self-solving enamel in various transformer manufacturing.

Lead-free solder wire and lead-free solder wire melting point: 

Lead solder wire melting point:

1) 63/37 solder wire has a melting point of 183 ° C

2) 60/40 solder wire has a melting point of 185 ° C -190 ° C

3) 55/45 solder wire has a melting point of 187 ° C -202 ° C 

4) 50 / 50 solder wire has a melting point of 190 ° C -216 ° C

5) The melting point of 45/55 solder wire is 192 ° C -227 ° C 

5) The melting point of 40/60 solder wire is 194 ° C -238 ° C

6) 35/65 solder wire has a melting point of 198 ° C -247 ° C 

7) 30 / 70 solder wire has a melting point of 202 ° C -256 ° C

Lead-free solder wire melting point:

1) The melting point of Sn-Cu-Ni solder wire is 225 ° C -227 ° C

2) The melting point of Sn-Cu-Ag solder wire is 211 ° C -219 ° C

3) The melting point of Sn-Bi-Ag solder wire is 205 ° C -208 ° C 

4) The melting point of Sn-Zn solder wire is 117 ° C -119 ° C

5) The melting point of Sn-Cu solder wire is 220 ° C -222 ° C 

6) The melting point of Sn-Ag solder wire is 221 ° C

The above melting points of lead solder and lead-free solder are shared here. Note: In the red area, the temperature exceeds 400 ° C (752 ° F), do not often or continuously use; occasionally need to use in large solder joints or very fast welding It can only be used in a short time.

As is known, the solder wire is a solder material. The solder wire is mainly a linear solder made of fusible metal tin-lead. It is melted when heated to a certain temperature, and can form an alloy on the surface of the metal to be welded when it is melted. The weld metal is joined together. The solder wire (solder wire) is tubular and has a flux inside (high-quality rosin is added with a certain activator). We will encounter various problems in the soldering process. What is the reason why the soldering iron is not tinned? The following staff from Shenzhen Xinghongtai factory analyze for you:

The reason why the soldering iron does not stick to tin:

1. The solder wire is not pure or the tin content is too low. (The solder wire used by Xinghongtai uses 100% raw materials)

2. The temperature is too high. When it exceeds 400 °C, it is easy to oxidize the surface of the tin.

3. The tin-coated surface is not tinned when used.

4. The sponge used for wiping the iron head is too high in sulphur, too dry or too dirty.

5. Exposure to organic substances such as plastics, lubricating oils or other compounds.

6. If the flux is too little during soldering, or if the active flux is used, the surface will be oxidized quickly; the water-soluble flux will corrode at high temperature and will damage the soldering iron tip.

The quick and efficient way to do this is:

Hold the electric iron handle, and immerse the oxidized iron tip into a container filled with alcohol. After 1 to 2 minutes, the oxide is completely and cleanly removed, and the soldering iron is completely new. This is because when copper oxide and alcohol are heated, a chemical reaction occurs, and copper is reduced, which has no corrosive effect on the soldering iron tip.

The reason why the soldering iron is not tinned is shared here. Therefore, the soldering of the solder wire is mainly caused by the temperature of the soldering iron to melt it to achieve the final soldering purpose. The selection of the soldering iron is very important. You can combine it with the choice and use of the soldering iron we mentioned last time.

Solder wire is a common solder material in the electronics industry. We use it together with soldering iron when soldering electronic components. There are many kinds of solder wire. One of them is called active solder wire. We don't know about active solder wire. Today, the technical staff of Shenzhen Xinghongtai manufacturer introduced the difference between active solder wire and ordinary solder wire:

First understand what is active solder wire:

Active solder wire refers to a solder wire to which an active agent is added, which is advantageous for soldering. The active agent in the active solder wire is to improve the auxiliary heat conduction of the solder wire in the welding process, remove the oxidation, reduce the surface tension of the material to be welded, remove the oil stain on the surface of the welded material, and increase the welding area. The characteristic of the active solder wire is a tin alloy wire having a certain length and diameter, which can be used in combination with the soldering iron in the soldering of the electronic original device.

The difference between active solder wire and ordinary solder wire

There is no essential difference between the active solder wire and the ordinary solder wire. The active solder wire is added with an active agent, which is beneficial for soldering; generally, the common solder wire has an active agent added thereto. Ordinary solder wire is an alloy of tin and lead. The tin content is high, the melting point of the solder is low, and the fluidity is good. Welding general electrical products have no requirements for tin wire, as long as the welding operation is good, the quality of welding is high.

The formula of the active core solder wire enables the solder wire to improve the expansion rate while being qualified, the fragrance during soldering, the solder joints are full and matte, the flux residue is non-corrosive, and the insulation resistance is high. The composition and weight percentage of the present invention are: Solder 97-99, flux 1-3, wherein the composition and weight percentage of flux are: special grade rosin 50-95, modified rosin 5-50, antioxidant 0.1-5, organic nitrogen compound hydrohalide 0.1-5, Fatty acid 0.2-5.

Solder materials are commonly used in the electronics industry. Solder is a general term for metal alloy materials used for filling welds, weld overlays, and braze joints. When we buy solder wire, solder bar, etc., in addition to understanding the solder wire specifications, we also need to understand the tin solder suitable for the product, understand its performance, then what are the basic methods of tin solder selection? Below by Xing Hongtai manufacturers The staff introduced to you:

First, the alloy composition of the tin solder is initially determined according to the reliability requirements of the product to be assembled and the assembly welding method. High-demand products usually require good comprehensive performance of all aspects of solder, low soldering process temperature, avoid or reduce adverse effects on the product, and cost becomes a factor to be considered later.

Then, considering the reliability of the product to be assembled, the performance and cost of the lead-free solder, etc., after the primary selection of tin solder, the performance of the primary lead-free solder should be tested or specified according to international or national standards. The dealers go to the third-party qualification testing institutions for performance testing, such as alloy chemical composition, melting point or liquidus, wettability, mechanical properties, reliability and so on. Once the indicators meet the design requirements, they can begin their applied research.

Comprehensive evaluation of the performance of selected lead-free solder, including performance, price, process suitability, reliability, and equipment, process compatibility, etc., to screen out suitable lead-free solder.

The basic method of tin solder selection above is shared here. The solder can be divided into tin-lead solder, silver solder, copper solder, etc. depending on the composition of the composition.

Solder wire is mainly used for micro-joining or repair welding of components such as components, PCB boards or pipes. Solder wire often has a lot of smoke during welding, so many people will have questions: Does the solder wire have any harm to people? The staff of Xinghongtai factory explained that as long as the correct use of solder wire is harmless to people, then how? Safe to use solder wire? Let's take a look at it:

1. Control of the use of environmentally friendly solder wire. Such as: a spacious, well-ventilated workshop environment; a micro-pumping fan is uniformly installed for each welding station to allow the smoke to dissipate as quickly as possible, reducing the amount of inhalation by the human body.

2. Adjust the flux content and composition injected during the production of environmentally friendly solder wire. Replace the original chemical flux with organic rosin to make the solder wire more environmentally friendly.

3. Strengthen personal protection to prevent the harm of toxic gases and dust generated during welding. Workers must use appropriate protective glasses, masks, masks, gloves, white protective clothing, insulated shoes, never wear short-sleeved clothes or roll up sleeves. If working in a closed container with poor ventilation, wear it. Protective helmet for air performance.

4, ventilation can be divided into natural ventilation and mechanical ventilation, which mechanical ventilation is dependent on the pressure generated by the fan to change the air, dust removal, detoxification effect is better, so in the natural ventilation of the room, when the closed container is welded, There must be mechanical ventilation.

5. The operator should carry out the necessary occupational safety and health knowledge education to improve their self-prevention awareness and reduce the incidence of occupational diseases. At the same time, it is necessary to strengthen the monitoring of dust hazards in the workplace and the physical examination of the welders to detect and solve problems in a timely manner.

The above how to use the solder wire safely is shared here. The safe use of solder wire can ensure the health of the human body. Therefore, the method used for the solder wire must be well known, so as to maintain long-term usability. You can learn about the operation of the solder wire we mentioned last time.

Solder wire is the most common solder material in the electronics industry. Tin wire is an alloy material that forms a wire. The correct use of solder wire is conducive to improve production efficiency, so we must control the temperature when soldering, the appropriate temperature to ensure that the solder wire plays a good functional effect, so temperature control is very important. Then how to control the temperature when using solder wire? The following staff from Shenzhen Xinghongtai factory introduce to you:

1. When the solder wire is soldered, the temperature should be effectively controlled so that the solder wire has a good soldering effect. When the solder wire is soldered, the appropriate solder wire should be avoided in the solder pot, the solder pot should be connected, the power switch should be turned over, and then the temperature should be adjusted to about 250 degrees Celsius. The solder wire should be tinned on the red heating tube. Dispose of to ensure that the entire tin surface can completely cover the heating tube. When the solder wire is melted, the number of solder wires should be properly added to ensure that the tin surface is at a suitable temperature.

2. When the solder wire is used, it is assumed that there is still solder wire in the tin furnace. Do not block the heating power of the soldering furnace. At this time, the temperature should be properly controlled. The set temperature should not be too high. To avoid accelerating the oxidation reaction of the tin surface. Generally, we can control the temperature of 63/67 solder wire at 250 degrees Celsius, the temperature of 50/50 solder wire should be controlled at 280 degrees Celsius, and the 30/70 solder wire should be controlled at 300 degrees Celsius.

3. When the temperature of the soldering iron of the soldering wire is investigated, it should not be investigated only by the appearance of the tin furnace itself. This will only form a large contrast error. It should be pricked into the tin furnace for testing, generally high temperature soldering. The working temperature of the wire should be controlled within 400-500 degrees Celsius. If the temperature is not reached, it will form a problem of continuous welding and no solder joints. Therefore, when using solder wire for soldering, the temperature should be strictly controlled so as to ensure the soldering quality of the solder wire.

The above how to control the temperature when using solder wire is shared here. Solder wire is widely used in the soldering, soldering and hardware industries of the electronics industry for wave soldering, dip soldering and other precision welding. You can understand together with the low temperature that the solder wire we mentioned last time can withstand.

With the rapid development of electronic products in China, the corresponding electronic materials have also been widely used. Solder wire is also one of them. In electronic and electrical products, solder wire is an indispensable connecting material. We use solder wire soldering. When the temperature is strictly controlled, we can ensure that the electronic products get better quality. Maybe we don't know the standard temperature, so how many degrees of low temperature can the solder wire be? The following staff of Shenzhen Xinghongtai manufacturers Let me introduce you:

The solder wire produced by Xinghongtai is made of pure tin material from Yunnan Tin Mine to ensure the high quality requirements of tin wire products. The low temperature resistance of solder joints exceeds -50 °C. The following solder specialists have summarized the appropriate operating temperatures for various soldering jobs: 

Usually solder wire melting point: 183 ° C - 215 ° C (about 361 ° F - 419 ° F)

Normal operating temperature: 270 ° C - 320 ° C (about 518 ° F - 608 ° F) 

Production line operating temperature: 300 ° C ~ 380 ° C (about 572 ° F - 716 ° F) 

Tin suction working temperature (small solder joint): 315 ° C (about 600 ° F)

Tin suction working temperature (large solder joint): 400 ° C (about 752 ° F) 

Note: In the red area, the temperature exceeds 400 ° C (752 ° F), do not often or in succession; occasionally need to be used in large solder joints or very fast welding, can only be used in a short time.

The low temperature of the above solder wire can be shared here. When using solder wire for soldering, the temperature should be effectively controlled, so as to ensure a good soldering effect of the solder wire.

In the electronics industry, solder wire is the most common solder material. Solder wire is the medium between the connecting component and the circuit board, which is essential in production and maintenance work. The main component of rosin in the solder wire is about 5-6% of rosin anhydride and 80% resin hydrocarbon, volatile oil and trace bitter substances. When the solder wire is soldered, the working temperature reaches 250 °C, and some oxides can be dissolved. carbon dioxide. Many users don't understand the tin content of the solder wire. Today, the staff of Shenzhen Xinghongtai manufacturers will share with you:

What should be the tin content of the solder wire? Different solder wires can be different. Among them, the main components of lead solder wire are lead and tin, and the eutectic point of tin-lead alloy is 6337, which means that the tin (sn) content is 63%, the lead (pb) content is 37%, and the eutectic temperature is 183 degrees. The crystal structure of the crystal grain is very thin, and is not easily changed by the influence of the environment, so that the reliability of the PCBA is ensured, and the operating temperature is low, which facilitates the soldering operation. In practice, it is divided into many alloy matching solder wires, such as 60 tin / 40 lead, 55 tin / 45 lead, 50 tin / 50 lead, 45 tin / 55 lead, 40 tin / 60 lead, etc., which alloy to choose The ratio needs to take into account its own needs, cost budget and welding efficiency.

In order to meet environmental protection requirements, many factories have begun to use lead-free solder wire, with a conventional tin content of 99.3%. Solder wire tin content ratio: 63 tin / 37 lead, 60 tin / 40 lead, 55 tin / 45 lead, 50 tin / 50 lead, 45 tin / 55 lead, 40 tin / 60 lead, 35 tin / 65 lead Etc., because the price of tin is about 6 times the price of lead, so the more tin content, the better the price; in addition, the pure tin solder wire, the tin content can reach 99.3%, the higher the purity, the more environmentally friendly, no harm to the body.

The smoke generated by the solder wire is caused by the vaporization of the flux generated by the flux in the solder wire and the high-temperature soldering iron. The solder wire additive contains rosin and chemical raw materials, and the long-term inhalation causes undesirable effects on the human body. Keeping ventilation will be good.

Work protection: Work must be done in a ventilated environment. For long-term operation in the same place, it is best to install an exhaust fan.

Solder wire is the most widely used in electronics factories. It is a solder material used primarily with soldering irons or lasers. The solder wire looks very similar to the fuse we encountered in life, so some people will ask what is the difference between the fuse and the solder wire? Today, the technicians of Shenzhen Xinghongtai manufacturer introduce you: 

First, the solder wire

Solder is an alloy of tin and lead. The ratio of tin to lead is different. The melting point of lead-free solder wire and the temperature required for soldering are different. Different soldering parts need different solder.

The role of the solder wire: the solder wire is added to the surface and the gap of the electronic original device by the metal as the filler, and the fixed electronic original device becomes the main component of the solder. The composition of the solder wire is inseparable from the quality of the solder wire, which will affect the solder. The chemical and mechanical properties and physical properties of silk.

Second, the fuse

The fuse is also called a fuse, which is defined by the IEC127 standard as "fuse-link". It is an electrical component that is installed in the circuit to ensure safe operation of the circuit.

The function of the fuse is: when the circuit is faulty or abnormal, the current is constantly rising, and the increased current may damage some important components or valuable components in the circuit, and may also burn the circuit or even cause a fire. If the fuse is correctly placed in the circuit, then the fuse will cut off the current when the current abnormally rises to a certain height and a certain time, thereby protecting the safe operation of the circuit.

The difference between the fuse and the solder wire:

1. From the above point of view: the fuse color is darker, and the solder wire is brighter.

2. from the degree of softness: the fuse is relatively soft, although the solder wire has a soft, but the touch is still a little harder on the solder wire.

3. Analysis from the melting point: The fuse is a high melting point metal product material (lead product) with a melting point of about 327 degrees. However, the melting point of the solder wire is generally between 183 and 250 degrees. Therefore, the solder wire is easily melted. If the melting point of the solder is lower, is it true that it can be used as a proof wire? The answer is because, because of the high temperature of the solder The next one may not be separated, and may be stuck together due to the lack of flux such as rosin. So, don’t use solder as a fuse.