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Why does the phenomenon of tin explosion and tin explosion occur during welding?

Views : 249
Update time : 2022-09-05 19:11:18
1. What is fried tin and blasted tin?
The phenomenon of exploding tin and exploding tin means that when the solder wire (tin wire) is in the process of welding, when the high-temperature soldering iron tip touches the solder wire, it will make a cracking sound, and at the same time, small tin beads will burst out. It is the phenomenon of fried tin.
Second, the reason for fried tin
1. Moisture or excessive moisture in the working environment: In a humid working environment, there will be a lot of moisture in the air, so that the solder wire (tin wire) or the surface of the circuit board is wet and adhered to moisture, which may cause discontinuity at high temperatures. The phenomenon of fried tin or tin explosion. Especially in the spring rainy season, it is extremely easy to happen.
2. Solder wire (tin wire) processing problem: During the production process of the solder wire, during the winding process of the wire drawing machine, the solder wire (tin wire) may have some cracks, and the drawing oil will penetrate into the cracks, resulting in The phenomenon of tin frying is caused during the welding process.
3.Solder wire (tin wire) structure problem: the above two are only secondary reasons, this is the main reason for fried tin. The composition of the solder wire is composed of tin on the outside and a small tube filled with flux inside the tin wire. Therefore, during the soldering process, once the high-temperature soldering iron tip hits the solder wire, the flux inside the solder wire will quickly melt and generate a large number of air bubbles. Because the tin wire pipeline is sealed, a large number of air bubbles will be continuously squeezed, causing high pressure. When the pressure is too high, the solder will be exploded, resulting in the formation of explosive tin.
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