What is the best welding temperature for electronic components?

Date：2022-08-23 18:11:16Views：1842

As for the welding technology of electronic components, the commonly used tools and materials for welding include electric soldering iron, solder, flux, etc. in essence, welding is the easiest way to connect components with high quality. Therefore, welding technology is quite necessary. This paper has collected and collated some materials, and I hope that it can be of great reference value to all readers.

Welding elements: weldability of welding base metal; Cleanliness of welding parts; scaling powder; Welding temperature and time: the best temperature of solder is 250 ± 5 ℃, and the lowest welding temperature is 240 ℃. The temperature is too low to form cold welding spots. Higher than 260C tends to deteriorate the quality of the solder joint. The best time for welding: it takes 2 ~ 3S to complete the two processes of wetting and diffusion, and only 35% of the two processes of wetting and diffusion are completed in 1s.

Generally, the welding time of IC and triode is less than 3S, and the welding time of other components is 4-5s.

Welding method: different welding objects require different working temperatures of electric soldering iron. When judging the temperature of the soldering iron head, the electric soldering iron can touch the rosin. If there is a "squeaking" sound when the soldering iron touches the rosin, the temperature is appropriate; If there is no sound, it can only melt the rosin, indicating that the temperature is low; If a large amount of smoke is emitted when the iron tip touches the rosin, it indicates that the temperature is too high.

Generally speaking, there are three steps for welding:

1. Melt a small amount of solder and rosin on the soldering iron head, and align the soldering iron head and the solder wire with the solder joint at the same time.

2. When the flux on the soldering iron head has not been volatilized, the soldering iron head and the solder wire shall contact the solder joint at the same time to start melting the solder.

3. When the solder soaks the whole solder joint, remove the iron head and solder wire at the same time or remove the tin wire first. After the solder joint is full and beautiful, leave the iron head and solder wire.

The welding process is generally 2-3s. When welding integrated circuits, the amount of solder and flux shall be strictly controlled. In order to avoid damage to the integrated circuit due to poor insulation of the electric soldering iron or the induced voltage of the internal heater to the shell, the method of unplugging the power plug of the electric soldering iron and welding while hot is often used in practical applications.

The above is the related content of "component welding skills and temperature" brought by the core creation test. I hope it can help you. We will bring more wonderful content in the later period. The company's testing services cover: electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, function testing, factory incoming material inspection, braiding and other test items. Welcome to call Chuangxin testing, we will serve you wholeheartedly.