Preparation of Alloy Mixed Powders for Electrical Contacts

Abstract

The invention discloses alloy mixed powder for preparing electric contacts, which comprises 18-25 parts of titanium chromium, 17-34 parts of alloy mixed powder, 4-13 parts of germanium dioxide, 4-11 parts of zinc, and 2-11 parts of boron carbide , 4-10 parts of lanthanum, 2-11 parts of silver cadmium oxide, 2-9 parts of metal oxide, 4-9 parts of tin oxide, 2-9 parts of titanium powder. The alloy mixed powder for preparing electrical contacts of the present invention is added with titanium chromide, alloy mixed powder, rare earth, etc., so that the material has strong welding resistance, good arc extinguishing performance and oxidation resistance, and the electrical conductivity is comparable to that of silver-based electrical contacts. Composite materials are similar and have superior wear resistance, which can be used as an inexpensive substitute for silver alloy electrical contacts used in low-voltage switches.

Description

technical field [0001] The invention belongs to the field of electrical contacts, in particular to alloy mixed powder for preparing electrical contacts. Background technique [0002] As the core component of medium and high voltage switchgear, electrical contacts play the role of breaking and conducting, and are widely used in various high-voltage load switches, SF6 circuit breakers, on-load tap-changers, large breaking capacity isolating switches and grounding switch. Electrical contacts are mainly divided into rivet type electrical contacts, powder metallurgy contacts, sheet contacts and so on. Electric contacts are important components of high-voltage circuit breakers, switch cabinets, disconnectors, and grounding switches, and their performance directly affects the quality and service life of these high-voltage electrical appliances. Most of the existing electrical contacts use silver-based or copper-based conductor materials, but the precious metal silver is expensive...

AI Technical Summary

Problems solved by technology

Most of the existing electrical contacts use silver-based or copper-based conductor materials, but the precious metal silver is expensive, and copper is also easily oxidized