Why will alumina copper become galvanized sheet special material?

Automatic resistance welding itself is more complex, and there is a certain risk and timeliness, so in the selection of materials, we must use suitable materials to achieve a certain capacity, in this regard, what is the material of alumina copper?

The excellent softening resistance, wear resistance and superior electrical and thermal conductivity of alumina copper determine its excellent performance as electrode material, and solve the common phenomenon of electrode bonding when welding galvanized sheet.

Rust is one of the important reasons for the surface damage of automobile body, especially in the harsh environment such as salt spray, cold and humid heat, auto body rust phenomenon is more obvious, now in the automobile industry can be said to talk about rust color change. In order to solve the problem of automobile body rust, most of the automobile manufacturers at home and abroad the most common method is to use galvanized sheet with good corrosion resistance (including hot dip galvanized steel plate and electric galvanized steel plate). According to research, the corrosion resistance time of galvanized sheet is 2 ~ 3 times that of ordinary cold rolled steel sheet, so the use of galvanized sheet in the automobile industry is increasing year by year.

Because the welding performance of galvanized sheet is significantly worse than that of ordinary steel plate, there are often electrode bonding, solder joint fake welding or molten core is too small, the service life of the electrode is shortened, and the state is not stable, which seriously restricts the development of the superior performance of galvanized sheet and the improvement of production efficiency. Alumina copper is also called dispersion-strengthened copper, belonging to powder metallurgy, the main medium is copper, which contains 0.5% or 1.1% Al2O3. It has the following characteristics:

1, softening temperature up to 900℃, with very excellent high temperature mechanical properties. 2, hardness of more than 84HR, strength of 600MPa/ N /mm2, fatigue performance and wear resistance is better than chromium zirconium copper, long service life. 3, welding circuit impedance is small, high conductivity, up to 80 ~ 85IACS% 4, heat dissipation performance between tungsten and copper and pure copper, about 220 ~ 390W/ (m· K). The excellent resistance to softening, wear resistance and superior electrical and thermal conductivity of alumina copper determine its excellent performance as an electrode material, especially in resistance welding of galvanized sheet. It solves the common phenomenon of electrode bonding when welding galvanized sheet. It can effectively maintain the stability of welding, reduce the risk of virtual welding of galvanized sheet welding, good working environment, small welding spark, long service life of electrode, reduce the time of grinding and replacing electrode cap, and play a certain role in improving production efficiency. As galvanized sheet plays a more and more important role in the corrosion resistance of automobile body, the application of aluminum oxide copper electrode material in welding production will be more and more extensive.