Pseudo alloy is composed of silver and tungsten, or called it the binary alloy of silver and tungsten. Because tungsten with an extremely high melting point and silver cannot melt each other, we can not use the traditional method of preparation, the preparation of silver tungsten alloy must use the powder metallurgy method.
The characteristics of the silver tungsten alloy:
Silver and tungsten either in liquid or solid can't be miscible. Preparation of silver tungsten alloy only can be made of sintered materials by powder metallurgy method or the extrusion method. The characteristics of the material are high hardness, the ability of anti arc erosion, anti adhesion and anti welding strong. The silver tungsten alloy is produced by powder metallurgy method. The production of greater than 60% tungsten alloy much adopts the infiltration method. It's often used in the low voltage power switch, lifting switch, locomotive with pre contact switch, high current switch, and the heavy load relay, air circuit breaker and so on. Add the cobalt can improve the wettability of silver tungsten alloy, so that the contact resistance can be reduced.
The application of the silver tungsten alloy:
Silver tungsten alloy is widely used in high temperature resistant materials, high pressure switch for electrical alloy, EDM electrode, the microelectronic materials. And as the parts and components are widely used in aerospace, aviation, electronics, electric power, metallurgy, machinery, sports equipment and other industries.
The brand of the silver tungsten alloy:
The brand of the silver tungsten alloy are divided into AgW30 AgW40 AgW50 AgW55 AgW60 AgW65 AgW70 AgW75 AgW80 AgW85