What metals can an electric soldering iron weld
There are many types of metals that electric soldering iron can weld, which can be used to weld metal products such as copper, aluminum, and iron.
When using electric soldering iron to weld metal, the material is removed from the surface oxide layer with tin, rosin, or acidic agent. Electric soldering iron is usually used to weld electronic components, various wire connections, etc.
Electric soldering iron welding is Soldering, and the temperature is generally not high. Generally, the melting point of the welding material (filler metal) used is low, which generally does not exceed 400 degrees.
The metal material used in conjunction with electric soldering irons is generally tin, which is commonly used as a solder for circuit board welding, and plastic can also be soldered.
1. Surface treatment of welding parts
The soldering components welded by manual soldering iron are mostly electronic parts and wires, and under large-scale production conditions, electronic components within the "insurance period" will be used.
In general, surface cleaning work is required for welding parts with electric soldering iron to remove rust, oil, dust, and other impurities that affect the welding quality on the welding surface.
Simple and easy methods such as mechanical scraping and alcohol, acetone scrubbing, etc. are commonly used in manual operations.
2. Pre welding
Pre soldering refers to wetting the lead wire or conductive soldering part of the component to be soldered with soldering tin in advance, commonly referred to as tin plating, tin coating, tin lining, etc.
Why is it called pre soldering? Because its process and mechanism are all the entire process of soldering: the solder wets the surface of the solder, forms a bonding layer through the diffusion of metal, and causes the surface of the solder to be "coated" with a layer of solder.
Pre soldering is not an indispensable operation for soldering, but it is essential for manual soldering, especially for maintenance, debugging, and development work.
3. Excessive flux is not allowed
An appropriate amount of soldering flux is essential, but not the more the better. Excessive rosin will increase the workload of cleaning around the solder joint after welding, prolong the heating time (rosin melting, volatilization needs to take away heat), and reduce work efficiency;
When the heating time is insufficient, it is easy to be mixed into the solder to form "slag inclusion" defects; When welding switch components, excessive flux can easily flow to the contacts, resulting in poor contact.
The appropriate amount of flux is that the loose perfume can only wet the solder joint to be formed, and the loose perfume should not flow into the component surface or socket hole (such as IC socket) through the printed board.
For welding wires with rosin core, there is basically no need to apply flux again.
