What materials are soldering iron heads made of
1. What materials are the soldering iron heads made of?
The soldering iron tip is mainly composed of four metal materials: copper, iron, nickel, chromium, and tin.
Copper - As a heat conductor, it is the main component of the soldering iron tip. It accounts for about 85% of the material of the soldering iron tip. Copper has good thermal conductivity, which is conducive to the rapid heating of the soldering iron tip. Good soldering iron tips are made of copper, but some manufacturers use brass. In order to reduce costs, it also reduces the soldering iron temperature. thermal conductivity of the head.
Iron - plays an anti-corrosion role and is a key factor affecting the service life of the soldering iron tip. A good soldering iron tip has a fine and dense iron coating crystal structure and good corrosion resistance. Such a soldering iron tip has a long service life and a good tinning effect. Manufacturers with poor iron plating technology mainly rely on the thickness of the iron plating layer to control the service life of the soldering iron tip. Usually, if the iron plating layer is thick, the soldering iron tip will not be tinned, and if it is thin, it will not be durable.
Nickel - It plays the role of anti-rust on the iron plating layer, and is convenient for subsequent chrome plating.
Chromium - non-stick to tin, preventing tin from running onto the body of the soldering iron tip during use. Generally, the chrome plating time of the soldering iron tip is more than 5 minutes, and the ordinary decorative chrome plating is about 1 minute.
Tin - in the head, where the tin is used.
2. Coating
Long-life soldering iron tips must have high thermal conductivity, good tinning ability, and ensure uniform solder joints. Various head shapes can be used for welding and disassembly of various components and lines, and can be used for a long time without repairing files. ·In order to meet the above requirements, in addition to using new materials to replace the soldering iron tip, it must be specially treated on the copper substrate. Improper treatment will result in low thermal conductivity or difficulty in tinning and welding, or extremely short service life. According to sample analysis and plating experience, the method of iron plating, nickel plating, chrome plating, and tin plating is often used. Iron plating. The surface of the copper substrate is brightly treated and then plated with iron. The quality of this layer directly affects the service life and heat conduction. Since iron has moderate oxidation resistance, strength, wear resistance and tinning ability at 26O～4O0℃, iron plating process is adopted at home and abroad. According to the sample and use experience, the general head thickness is 0.15~O. 2Omm, the tip is greater than 0.2mm, and the thickness of the middle part and the heating end is preferably 0. O7～O. 15ram, so you can get better life 1 heat conduction
