Novel platinum alloy electrical contact material and preparation method thereof

Abstract

The invention discloses a novel platinum alloy electrical contact material and a preparation method thereof, belonging to the electrical contact material. The platinum-iridium alloy comprises the following chemical compositions by weight percent: 5.0-30.0% of Ir, 0.1-5.0% of Nb, 0.1-5.0% of Zr, 0.1-5.0% of Mo, 0.1-5.0% of Ta, 0.1-5.0% of Yb, 0.1-5.0% of Gd, 0.1-5.0% of Tb and the the balance Pt. The preparation method comprises the following steps: proportioning with the metal elemets such as Pt, Ir, Nb, Zr, Mo, Ta, Yb, Gd and Tb according to the design formulation of the chemical compositions, preparing PtIrNbZrMoTaYbGdTb alloy containing nine elemets in a high frequency melting furnace or a medium frequency melting furnace, and adopting rolling, drawing, heat treatment and other technologies to process the alloy and finally obtain the finished product which is shaped like a sheet, a rod, a contact or the like. The alloy material is characterized by high melting point and hardness, corrosion resistance, low contact resistance, high fusion welding resistance and arc ablation resistance and the like, is an electrical contact material with good performance and has wide application prospect in the fields such as aviation, aerospace, ships, automobiles, electrical and mechanical, electric appliances, electronics and communication.

Description

technical field [0001] The invention relates to a novel rare metal electrical contact material platinum alloy and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] Due to the development needs of aviation, aerospace, ships, automobiles, electromechanical, electrical appliances, electronics, communications and other fields, new types of electric wires with high melting point, high hardness, corrosion resistance, low contact resistance, high welding resistance and arc ablation resistance are required. Contact materials have become urgently needed materials, and platinum alloy electrical contact materials are required to have: (1) high chemical stability; (2) excellent comprehensive high-temperature mechanical properties; (3) good manufacturing and processing performance; (4) low and stable contact (5) Excellent anti-welding and arc ablation resistance; (6) By adding multiple rare metal elements to replace expensive noble met...

AI Technical Summary

Problems solved by technology

[0007] However, after long-term use, it has been found that platinum-iridium alloy electrical contact materials have deficiencies, such as: (1) severe arc erosion pits on the contact surface, showing protrusions or pits; (2) obvious metal transfer, which makes the contact materials melt (3) The contact device fails prematurely, which affects the reliability and electrical life of the overall component, etc.

For example, transition group elements such as niobium, chromium, zirconium, tungsten, and nickel have been successfully applied to platinum, and transition group elements such as niobium, iron, tungsten, and zirconium have been successfully applied to iridium, but they cannot completely replace Pt- Target of Ir alloy

Images