When it comes to welding materials, we have to talk about aluminum oxide dispersion copper.
Dispersion strengthened copper is a copper alloy that uses ultrafine alumina particles for dispersion strengthening. This alloy cannot be heat treated. This material uniquely combines high strength and high conductivity, which is unmatched by other copper alloy systems.
Alumina dispersion copper is a new type of alloy produced by introducing highly dispersed alumina particles into the copper matrix to block dislocation movement and inhibit recrystallization.
With the technical characteristics of alumina dispersion strengthening, the hardness of alumina dispersion copper is ≥ 80HRB, the conductivity is greater than 75% IACS, and the anti softening temperature is ≥ 930 ℃, making it an ideal resistance welding material.
In recent years, most automobile enterprises in Japan, Germany and the United States have generally adopted more advanced aluminum oxide dispersion copper to achieve lightweight welding of vehicle bodies.
As a High performance resistance welding material, this material has not yet been widely used in China's automotive field.
With the rapid development of China's electric vehicle industry, China's high-performance alumina dispersion copper industry has also entered the fast lane of development.
China's leading copper alloy technology company: NBBW Advanced Copper Alloy Technology Corporation has developed high performance dispersion strengthened copper (CuAl2O3).
NBBW has successively broken the technical barriers of overseas monopoly of various high-end copper alloy materials, such as copper nickel silicon, copper chromium zirconium, and achieved independent research, development and production.
In recent years, after continuous technological innovation and accumulation, NBBW has successfully developed alumina dispersion copper.
The series development of aluminum oxide dispersion copper products has been completed, and the products have been certified by many domestic and foreign customers.
As electric vehicles are upgrading to the 800V voltage platform, the aluminum oxide dispersion copper bar being promoted by NBBW is a typical application of dispersion strengthening technology in the high-voltage field.
In the welding application of aluminum oxide dispersion copper bar products, the high temperature softening temperature is greater than 950 degrees, and the conductivity reaches 75-85% IACS.
The test results of resistance welding conducted by customers of several electric vehicle enterprises in China show that Displacement strengthened copper (CuAl2O3) can effectively prevent mushroom deformation and reduce wear during electrode cap welding, and can also effectively prevent the high-temperature diffusion of zinc, aluminum and other elements, greatly reducing welding adhesion, increasing the number of weldable points at each grinding interval of electrode cap, and greatly improving the welding life.
At present, the Distribution stretched copper (CuAl2O3) has been applied to resistance welding electrode, battery welding, and gas shielded welding conductive nozzle to help customers improve production efficiency and product quality with a longer welding life.
NBBW's aluminum oxide dispersion copper technology will continue to innovate and iterate, and is expected to be applied to more core components of electric vehicles.