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How big is the solder wire diameter?
Aug 31, 2022
08-31
2022
Solder wire is an indispensable electronic accessory in electronic products. In the previous article, we have talked about the classification and classification of solder wire. The actual operation process of solder wire includes manual welding and automatic welding with the help of machines. It will be easy to choose a solder wire with a large wire diameter:
Differences between different tin wires
Aug 31, 2022
08-31
2022
Solder wire is one of the indispensable accessories in the welding of electronic products. It can be divided into lead-free solder wire and leaded solder wire according to whether it is environmentally friendly. The lead content is a small amount, less than 1000PBM meets the ROHS environmental protection standard, and the content of tin in the alloy composition is relatively high, as well as other metal elements such as silver and copper.
Answers to questions related to tin points when soldering lead-free tin wires
Aug 30, 2022
08-30
2022
Lead-free tin wire is a tin wire that meets environmental protection standards. In fact, there are standards in the industry for what effect the tin point achieves during the soldering process. Below we summarize the judgment standards and related issues for soldering tin points as follows:
Tin content of solder wire in the solder industry
Aug 30, 2022
08-30
2022
The question of the tin content of solder wire is believed to be asked by many industry personnel or purchasers when they consult solder wire. In solder products, the tin content of solder wire ranges from 15% to 99.95%. , So what should the tin content of the solder wire be? Different types of solder wire have different tin content.
Solder wire manual soldering iron soldering operation guide
Aug 30, 2022
08-30
2022
The temperature of the iron head is 150℃ on the basis of the melting point temperature of the solder. The temperature of the iron head of the lead solder wire can generally be set as 330℃, and the setting temperature of the iron head of the lead-free solder wire is generally expected to be between 350 degrees and 370 degrees.
Correct working temperature of solder wire and key points of soldering operation
Aug 30, 2022
08-30
2022
In the post-welding process or maintenance of electronic and electrical products, solder wire is the most indispensable connection material. When soldering the solder wire, the temperature should be effectively controlled to ensure that the solder wire has a good welding. effect.
BGA tin ball use and maintenance
Aug 23, 2022
08-23
2022
1. When using, please take out the necessary amount each time to avoid taking too much at one time.
2. The used solder balls should be kept separately in containers.
3. When the solder ball is used again, the reliability of use must be confirmed again before use.
4. When using the solder ball, do not shake or vibrate vigorously.
5. The flux and solder paste should not be too much or too little during ball placement.
Solder ball maintenance method
1. The storage condition is 25±10℃, the relative humidity is below 60%RH, and the storage period is 12 months
2. The temperature and humidity of the use environment should be the same as the storage conditions.
3. The storage place should try to avoid the solder balls from vibration, moisture and light exposure.
4. It is recommended that the tin balls that are not used temporarily should be stored in the original tin ball bottle, and the inner and outer lids should be locked.
5. The quality of the solder balls may be reduced due to vibration, moisture and light exposure.
6. Please try not to open the lid before using the solder balls to avoid the oxidation of the solder balls caused by air entering.
In the process of using tin strip, too much tin slag is produced, how to deal with it?
Aug 23, 2022
08-23
2022
In the process of wave soldering, tin bars will produce tin dross, but sometimes too much tin dross is found. At this time, we should pay attention to whether there is any problem.
First of all, we should distinguish whether the tin slag that appears is normal tin slag. Generally, the tin slag in the form of black powder is normal, while the tin slag in the form of tofu slag is abnormal. In view of this situation, we analyze the reasons for the following points:
1. In this case, the main reason is because of the problem of the wave furnace of the wave soldering equipment. At present, the design of many wave furnaces is not ideal. The wave peak is very high, the distance between the peaks is too wide, and the distance between the double wave furnaces is too close. There are also rotary pumps used in the equipment, which are all possible causes of tin dross. If the wave peak is too high, the deviation of the temperature reduction may become larger during the process of the solder falling from the peak to the peak, and the solder will be mixed with air, causing oxidation or semi-dissolving of the solder, resulting in the generation of tin dross. If the preventive measures of the rotary pump are not done well, the tin slag will be continuously pressed into the furnace, and the chain reaction of the loop will aggravate the generation of the problem tin slag.
2. The temperature is too low, and the temperature control of wave soldering is relatively low, generally 280 °C ± 5 °C, and this temperature is the minimum temperature required in the solder melting process, and the temperature is lower than the tin can not achieve good melting , indirectly causing excessive tin dross.
3. Missed the most suitable tinning time. In the wave soldering process, the time of adding tin strips is also very critical. The most suitable time is to always keep the distance between the tin surface and the peak as short as possible.
4. The tin slag in the furnace is not cleaned in time, and whether the tin slag is regularly cleaned is also one of the reasons for the problem. Too much tin slag in the furnace will cause the solder falling from the peak to not fall into the furnace as soon as possible, but Staying on the dross leads to uneven heating, thus causing excessive dross.
5. Is there a regular cleaning of the wave furnace? If the wave furnace is not cleaned for a long time, the impurity content in the furnace will be high, which will also lead to excessive tin slag.
When using solder wire, how should the working temperature be reasonably controlled?
Aug 23, 2022
08-23
2022
1. When soldering the solder wire, the working temperature should be effectively controlled, so as to ensure that the solder wire has a good welding effect. When soldering the solder wire, it should be avoided to put the appropriate solder wire into the tin pot, connect it to the tin pot, turn the power switch over and adjust the working temperature to about 250 degrees Celsius, and use the solder wire to coat the red heating tube. The disposal of the tin ensures that the entire tin surface can completely cover the heating tube. When the solder wire is melted, the solder wire should be added appropriately to ensure that the temperature of the tin surface is maintained at a relatively appropriate value.
2. When the solder wire is in use, if there is solder wire left in the tin furnace, do not cut off the heating power supply of the tin furnace. At this time, the working temperature should be adjusted appropriately to avoid accelerating the oxidation reaction of the tin surface. Usually we can control the working temperature of 63/67 solder wire at about 250 degrees Celsius, 50/50 solder wire should be controlled at about 280 degrees Celsius, and 30/70 solder wire should be controlled at about 300 degrees Celsius. .
2.When investigating the working temperature of the tin furnace of the solder wire, you should not simply check the appearance of the tin furnace itself, which will cause a relatively large error. You should use a special thermometer to pierce the tin furnace for testing. Usually high temperature solder The working temperature of the wire should be controlled within 400-500 degrees Celsius. If the working temperature is not reached, there will be problems with continuous welding and solder joints not shining. Therefore, when using solder wire for welding, the working temperature should be strictly controlled, so as to ensure the welding quality of the solder wire.
Chemical composition of lead-free solder paste
Aug 15, 2022
08-15
2022
The composition of lead-free solder paste is very complex, usually made by mixing metal solder powder, flux and other chemical additives evenly. Through a series of operations by the solder paste manufacturer, a milky mixture will be formed later. Solder paste will have a certain viscosity at room temperature. During the SMT patching process of the circuit board, the electronic components can be firmly adhered to a specific position. The factory does not collapse after the solder paste is patched during the SMT patching process. Stabilize electronic components.
During the secondary soldering process of reflow soldering, with the continuous volatilization of some solvents and additives in the solder paste, the solder paste will collapse slightly. Melted to form a strong metallurgical bond between the circuit board and the electronic components, thereby permanently connecting the soldered electronic components and the circuit board.
There is flux in the composition of lead-free solder paste. This material can not only remove metal oxides from circuit boards and electronic components, but also adhere to the surface of electronic components and circuit boards after melting, thereby preventing The two are oxidized twice, and the flux component in the lead-free solder paste forms a liquid after melting, and can also achieve the effect of assisting heat conduction. The components in the flux can promote the melting of the metal components in the solder paste and wet the metal surfaces waiting to be soldered on circuit boards and electronic components. At the same time, it can also reduce the tension on the surface of the solder paste. The flux components in the lead-free solder paste not only play the above important roles, but also can be used as a carrier of metal alloy powder in the production process of Xinfujin solder paste manufacturers.
The main components of lead-free solder paste can be mainly divided into the above-mentioned: activator, thixotropic agent, resin and solvent, etc. Among them, the flux is also the activator. The choice of flux is very important, usually a good one Lead-free solder paste should have good wetting properties, thermal collapse resistance, and good bonding properties, which are mainly reflected by the composition of the flux.
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