A kind of preparation method of high energy rare earth powder alloy electric contact material

Abstract

The invention relates to a method for producing an electrical contact material, particularly relates to a method for producing a high-energy rare earth powder alloy electrical contact material. According to the technical scheme provided by the invention, the method for producing a high-energy rare earth powder alloy electrical contact material is characterized by comprising the following steps of: firstly, completely mixing and stirring alumina powder, silver powder, lanthanum powder, graphite powder, molybdenum powder, yttrium powder, boron powder and nickel copper powder; secondly, using anoil press to squeeze and mold the powder, and then sintering the squeezed and molded object into a vacuum high-temperature furnace and then cooling; thirdly, burning the molded object in a high-temperature furnace, then taking out and squeezing the burnt object into a panel shape by using a die on the oil press, and then cooling with cold water, and finally using a machine tool to punch the cooled object into a contact. The invention overcomes disadvantages of the prior art and provides the method for producing an environment-friendly high-energy rare earth powder alloy electrical contact material with low silver content, impact resistance, corrosion resistance, antioxidation, low resistance and good electrical conductivity.

Description

technical field [0001] The invention relates to a preparation method of an electric contact material, in particular to a preparation method of a high-energy rare earth powder alloy electric contact material. Background technique [0002] The electrical contacts used in low-voltage electrical products are key components of electrical products and play an important role in ensuring the performance and reliability of electrical products. Therefore, the requirements for electrical contact materials are very high. Qualified electrical contacts should have long life, impact resistance, corrosion resistance, low resistance and good conductivity. In order to ensure the reliability of the electrical contacts, silver is often used at home and abroad, but the price of silver is expensive, which greatly increases the cost of the product. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a preparation...

AI Technical Summary

Problems solved by technology

[0005] The high-energy rare earth powder alloy environmental protection electric contact material produced by the method of the present invention has low cost, strong breaking capacity, low resistance, good electrical conductivity, wear resistance, oxidation resistance, and long life. It is very practical in AC contactors of various low-voltage electrical appliances, reducing The use of silver content greatly reduces the cost of contacts and solves the problem of high cost of silver. It is the most ideal material to replace silver cadmium oxide contacts at present, and also solves the poisonous problem of silver cadmium oxide contacts in the EU directive.