The temperature corresponding to the wattage of the electric soldering iron
1. Mark 20 - 25 W, and the corresponding welding temperature is 200 - 250 degrees;
2. Mark 30 - 35 W, and the corresponding welding temperature is 250 - 300 degrees;
3. Mark 40 - 45 W, and the corresponding welding temperature is 280 - 350 degrees;
4. Marked 50 W, the corresponding welding temperature is 320 - 380 degrees;
5. Marked 60 W, the corresponding welding temperature is 320 - 400 degrees;
6. Mark 75 - 80 W, and the corresponding welding temperature is 350 - 400 degrees;
7. Mark 100 W, the corresponding welding temperature is 380 - 450 degrees;
4. Operation method
1. The welding of solder joints adheres to the 5-step method: press 1 Cleaning - 2 Heating - 3 Adding solder - 4 Taking solder - 5 Quickly remove the soldering iron - Cooling and solidifying - Solder joints - Trimming and cleaning. The heating position should be accurate, quick and skilled.
2. Generally, the welding time is controlled within 2.5 seconds. For the welding time below 320 degrees, the welding time is controlled within 3 seconds. For the pad diameter above 4 mm, the welding time is controlled within 5 seconds. The welding of integrated circuits and heat-sensitive components should not exceed 2 seconds. seconds, and the number of repeated welding shall not exceed 3 times.
3. Put the solder (solder wire) on the solder joint, then melt the solder with a soldering iron, and transfer heat from the contact surface of the solder with the soldering iron to the welding surface to realize welding, which is the most effective way to heat the workpiece. Directly heating the workpiece with a soldering iron not only has poor thermal efficiency, but also accelerates the oxidation of the welding surface, which deteriorates the welding and causes more welding difficulties.
