Ultra-high-strength elastic copper alloy generally refers to a copper alloy with a strength of 1,000 MPa or more and an elastic modulus of 125 GPa or more. Elastic copper alloys for high-reliability connectors are mainly beryllium copper alloys. Industrial developed countries have reached a very high level in the production and application of beryllium copper alloy materials, and related equipment and production technology are still innovating; especially the United States (represented by Materion Group) and Japan (represented by NAGAKI Seiki Co., Ltd.) ) The production scale of the enterprise is very large, and the production technology and equipment level are in a leading position in the world.
The beryllium copper alloy contains beryllium, a highly toxic substance, and the stress relaxation rate increases sharply at a temperature higher than 150°C, which can easily cause the contact pressure of the elastic components to change in the working state, resulting in the failure of the connector. The development of a new type of environmentally friendly, ultra-high strength, high stress relaxation resistance, excellent formability, and high reliability conductive elastic copper alloy has become a research hotspot for elastic materials. Alloys such as Cu-Ni-Mn, Cu-Ti and Cu-Ni-Sn are all age-strengthened alloys. After deformation and heat treatment, they can obtain strength and elasticity comparable to that of beryllium copper alloys, as well as superior corrosion resistance and resistance. Stress relaxation performance. These alloys have been researched and developed by companies in France, the United States, and Japan, and have partially replaced the industrial applications of beryllium copper alloys.