Silver-based and titanium-carbide-based contact material and preparation method thereof

Abstract

The invention provides a silver-based and titanium-carbide-based contact material and a preparation method thereof. The silver-based and titanium-carbide-based contact material comprises, by weight, 3%-40% of titanium carbide and the balance silver, or comprises, by weight, 3%-40% of titanium carbide, 0.01%-5% of carbon and the balance silver, or comprises, by weight, 3%-40% of titanium carbide, 0.01%-4% of a mixture of one or several kinds of iron, cobalt and nickel and the balance silver, or comprises, by weight, 3%-40% of titanium carbide, 0.01%-5% of carbon, 0.01%-4% of a mixture of one or several kinds of iron, cobalt and nickel and the balance silver. A power metallurgic method and an infiltration method are adopted in the preparation method. The silver-based and titanium-carbide-based contact material has the advantages that welding resistance is good, arc erosion resistance is achieved, under the condition of long-time use, contact resistance between contacts is low, and contact temperature rising is low and stable.

Description

technical field [0001] The invention relates to a silver and titanium carbide-based contact material and a preparation method thereof. Background technique [0002] Contacts are the core components of low-voltage electrical appliances, which play the role of connecting, carrying and breaking currents. Their pros and cons directly affect the safety and reliability of low-voltage electrical appliances. At present, low-voltage circuit breakers mostly use silver tungsten, silver tungsten carbide, and silver tungsten carbide graphite as contact materials, which are widely used because of their good anti-welding performance and arc ablation resistance. However, during the long-term use of this contact material with tungsten and tungsten carbide as the main additive phase, both tungsten and tungsten carbide will be oxidized, and react with silver to form non-conductive silver tungstate on the contact surface, making the gap between the contacts The contact resistance increases, c...

AI Technical Summary

Problems solved by technology

However, during the long-term use of this contact material with tungsten and tungsten carbide as the main additive phase, both tungsten and tungsten carbide will be oxidized, and react with silver to form non-conductive silver tungstate on the contact surface, making the gap between the contacts The contact resistance increases, resulting in an excessive temperature rise of the electrical appliance