Contact material used for high-breaking low-voltage electric appliance, method for manufacturing contact material, composite contact material used for high-breaking low-voltage electric appliance and method for manufacturing composite contact material

The invention provides a contact material used for a high-breaking low-voltage electric appliance, a method for manufacturing the contact material, a composite contact material used for the high-breaking low-voltage electric appliance and a method for manufacturing the composite contact material, and belongs to the technical field of electrical contact materials in the low-voltage electric appliance industry and the household appliance industry. The problem that an existing copper-based contact can not meet the requirements of the low-voltage electric appliance for the limit short-circuit breaking capacity Icu and the specified running short-circuit breaking capacity Ics is solved. The contact material of the high-breaking low-voltage electric appliance is made of diamond powder, copper alloy powder, welding resistance reinforcing phases and pure copper powder through a metallurgy method. Silver-based alloy powder is combined with the contact material used for the high-breaking low-voltage electric appliance to form the composite contact material through the brush coating process. The contact material used for the high-breaking low-voltage electric appliance has the high limit short-circuit breaking capacity Icu and the high specified running short-circuit breaking capacity Ics, and the contact material used for the high-breaking low-voltage electric appliance, the method for manufacturing the contact material, the composite contact material used for the high-breaking low-voltage electric appliance and the method for manufacturing the composite contact material are used for the electrical contact materials in the low-voltage electric appliance industry and the household appliance industry.