Different types of electrical contacts and alloying process

Iku angel kanggo logam murni siji kanggo ketemu kabeh syarat sakakontak listrik. With the development of vacuum switch gear to large capacity, electrical contact materials have experienced the development process from single metal to binary and then to multicomponent composites. In different application occasions, the requirements for contact materials also have different degrees of emphasis. There are many contradictions between the electrical characteristics of contacts and the physical properties of materials;

1. Low cut-off tingkatkontak listrikmbutuhake materi duwe konduktivitas kurang, konduktivitas termal lan titik leleh kurang. Kapasitas pecah sing dhuwur, resistensi welding fusi lan resistensi nyandhang listrik mbutuhake sifat sing ngelawan. Iki uga minangka salah sawijining kesulitan paling gedhe kanggo ngembangake bahan kontak.

2. Bahan kontak listrik with fusion welding resistance are generally brittle and have poor strength, which is in contradiction with the requirements for higher mechanical strength, deformation resistance and electrical wear resistance of contacts. In order to solve or reduce the above contradiction, most material workers believe that alloying is the only choice. In the selection of alloy elements, the following trends exist according to different requirements.