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What properties should a flux for solder wire have?
Sep 21, 2022
09-21
2022
Flux is an indispensable material in electronic assembly technology. The quality of flux directly affects the entire production process and product quality of the electronics industry. Therefore, flux plays an important role in the soldering process. So what properties should the flux for solder wire have?
(1) The flux for solder wire should have an appropriate active temperature range. It starts to work before the solder is melted, and plays a better role in removing the oxide film and reducing the surface tension of the liquid solder during the soldering process. The melting point of the flux should be lower than that of the solder, but not too large.
Purpose of Soldering with Solder Paste
Sep 21, 2022
09-21
2022
1. Characteristics of soldering with lead-free solder paste
Soldering with solder paste manufacturers can perform mechanized operations and complete a large number of soldering operations in a short period of time. For example, our common use of SMT process, wave soldering process and hand dip soldering process all use solder for soldering. The difference between several soldering processes is the use of different soldering materials. For example, the common SMT process uses solder paste for soldering, and the wave soldering and hand dip soldering processes use solder bars for soldering.
Precautions when soldering solid solder wire
Sep 21, 2022
09-21
2022
When soldering solid core solder wire, it is necessary to add flux, and the selected flux should be composed of rosin and a small amount of active agent. Temperature control is the most important thing when solid welding wire is used for welding. During the welding process, the melting point of the welding should be kept at 50 degrees Celsius. When soldering solid solder wire, the temperature of the soldering iron tip should be accurately controlled. According to the size of the soldered piece, as well as the performance and power of the soldering iron, different types of solder and the linearity of the solder wire can be selected. Should exceed 100 degrees Celsius.
Welding requirements and characteristics of active lead-free solder wire
Sep 21, 2022
09-21
2022
Soldering requirements for active lead-free solder wire:
Active lead-free solder wire generally has better welding effect with a constant temperature soldering iron, and the welding speed is relatively fast. Novices who use solder wire need to be trained for a period of time. If a variable temperature soldering iron is used, the tip of the soldering iron should be adjusted to the optimum soldering temperature on the solder wire manual. If there is a quality problem, please connect the business department as soon as possible, and the business department will send warehouse related personnel to handle the exchange.
Technical application of solder wire
Sep 20, 2022
09-20
2022
In the entire production process of solder wire, the reason why the extrusion process is designated as a special process is because extrusion is a key link in the entire production process. At that time, many electronic components were electroplated with a layer of chromium on the surface. Metal, metal chromium has a very strong recovery ability, which can strengthen the surface strength and corrosion resistance of electronic components.
The understanding and purchase of tin wire
Sep 20, 2022
09-20
2022
Tin wire is the most common welding material used in the welding of electronic and electrical products. Tin wire is mainly an industrial soldering solder used for connecting electronic devices to circuit boards.
Improper operation will cause the wire to be discarded, and the discarded tin wire can be reused by recycling to improve the utilization rate of the tin wire.
The role of solder flux
Sep 19, 2022
09-19
2022
Solder flux is mainly used to wet the base metal during the welding process, if the material being welded is not wet enough. The entire welding cannot be performed. It's like putting grease on a material, and the material cannot be wetted by water. Because the oil on the surface of the material cannot be mixed with water, that is, the wettability is not enough, and the two cannot be combined.
Definition of high temperature solder paste
Sep 19, 2022
09-19
2022
The production of solder paste will be designed according to different operating temperatures. We all know that the melting point of pure metal tin is about 230 ℃, and the melting point of alloy is that the mixture of two or more metals will be lower than the melting point of single metal. According to the type of two metal alloys and their content in the alloy, their melting points are also different. The internal solder powder is composed of different alloys.
Explain the problems and solutions in the use of tin bars
Sep 19, 2022
09-19
2022
1. Too much tin dross during the use of tin bars?
Answer: This situation is divided into hand dip furnace and wave furnace (wave furnace has semi-automatic and fully automatic wave furnace) to analyze. The analysis has the following points:
The solution for the spots and residues on the surface of the tin bar
Sep 19, 2022
09-19
2022
The basic reason for the phenomenon of flower spots and residues on the surface of the tin bar is that these trace alloy elements in the tin bar have a great influence on the physical and mechanical properties of the tin bar. If the amount is too large, the fatigue life and plasticity of the solder joint will be reduced, and the appropriate amount of bismuth is about 0.2~1.5%. In the systematically designed chemical composition, the designer obviously hopes that the performance of the tin bar can reach an optimal balance, such as welding performance, melting temperature, strength, plasticity and fatigue life.
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