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The difference between the performance of lead solder wire and lead-free solder wire

SendTime:2018-4-20

Lead solder wire and lead-free solder wire are two major categories of different product grades, due to the difference in the composition of the metal caused by the melting point is also the same as the melting point of lead solder wire at 183 degrees, and the melting point of lead-free solder wire is 217- 227 degrees. The lower the lead content, the higher the melting point. As the melting point temperature of the solder wire is improved, the volatilization rate of the flux is also accelerated, and the activity of the tin may be insufficiently generated, and the solder tip, the solder bridge, or the drawing may seriously affect the welding result. Flux is the key factor that determines the activity (activity) of the metal after melting of the solder wire.

If the tip of the lead solder wire is used in an environment where the temperature is too high, the tip of the iron tip will produce a layer of charred oxide. This sign is even more severe in the lead-free solder manufacturing process. This metal interacts with the flux in a high-temperature, oxygen-environment environment. The generation of oxides can severely affect the normal amount of tin consumed before the soldering iron. Even if there is little effect on the amount of tin in the solder joints, the presence of oxide residues in solder joints has a great influence on the character of the soldering process.

Lead solder wire and lead-free solder wire also have differences in solderability. Lead solder wire is relatively better for welding operation. In addition to the melting point temperature and flux mentioned above, there are other reasons. The purity of lead-free solder tin is too high to be used for welding. The lead-free solder wire has a longer operating time than leaded solder wire, and is about 0.2-0.5 seconds longer.

Shanxing Lead-free solder wire has a stable character and good performance. It has the following characteristics:

1, excellent solderability, wet time is short.

2. Lead-free solder wire does not spatter during welding operation. As the solder wire has a well-proportioned lead-free flux, it has no odor, less welding fumes, and does not contain persecution health.

3, Hua Chuang brand lead-free solder wire welding is not deep-fried tin, no explosion tin. Acceptance of advanced solder wire production and deployment of advanced equipment, strict implementation of high quality production scale.

4, Hua Chuang brand lead-free solder wire winding uniform, not tie knot, appearance is bright.

Delicate events of lead-free solder wire welding operations:

1. The use of authentic lead-free soldering iron heads supplied with manufacturers, impersonation or poor quality lead-free soldering iron tips, different aperture sizes, and different casing thicknesses, these environments can lead to the unstabilized use of lead-free soldering irons. Impedes and shortens the service life of the soldering iron.

2. Before the welding operation, the temperature of the iron head should be measured with a thermometer. Careful: The temperature of the iron tip of the iron head is very high, as high as 300 °C or more, the welding staff should be alert to be scalded! At the same time, the soldering action must be fast, so as to prevent excessive heat from being introduced into the pad of the circuit board to cause burning.

3, set the temperature of the soldering iron should consider the heat resistance and quietness of electronic components, need to use the temperature of the soldering iron to make the welding temperature a continuous, long-term, so that the lead-free solder wire welding results better . After the welding operation, the lead-free soldering iron heads and tube sleeves still need some time to cool. The solder joints and the original electronic devices to be soldered are still very hot. Please do not smash them by hand to prevent burns.