★ lead-free hand soldering iron
Basic types of electric iron
A low-cost hollow electric iron
Such electric iron is generally from two core power cable directly connected to the heating unit with a fixed output power. As the tip is not grounded. Therefore not suitable for soldering static-sensitive electronic components. And replace the damaged due to the heating unit and the tip can not only abandoned.
2, non-adjustable voltage professional Soldering Iron
Basic principles and the same one, in iron. There are two core and three core. The heating unit and the tip can be replaced. Tip, shape, power is optional.
3, transformer powered soldering workbench
Adjustable voltage, anti-static
4, mini electric iron
In order to adapt to small components, is characterized by relatively small tip
5, high-power soldering iron
More than 100W, the tip temperature, volume, beware of "Fire".
Notes of the lead-free hand-soldering iron
1, the power of the electric iron is generally more than 60W, 70W/75W most appropriate in general. The tip temperature is higher than the solder melting point of 150 ° C, lead-free hand soldering iron tip temperature should be around 370-400 ℃.
2, we recommend using a heated iron, This will not only ensure adequate welding temperature, but also not overheating damage of the tip soldering iron. Meanwhile, the tip may overheat, leading to serious splash problem.
3, the tin content in lead-free solder is quite high, generally more than 95WT%, while the high tin content lead-free solder wire corrosion of the tip relative. Recommend the use of the tip with an effective protective coating.
4, the electric iron for lead-free solder must have a good back-temperature performance, it is very important for IC pin drag welding.
Dip soldering process is relatively simple but bearing in mind the following five points:
A lead-free dip soldering, solder pot temperature is generally set to 260 ℃ -280 ℃, of course, based on process requirements under the conditions of the transformer dip tin, solder pot temperature should be set to 380 ℃ -470 ℃.
2, a major problem of the quality of the dip soldering flux volatile.