Structure and process for preparing silver-nickel alloy-pure aluminum contact through explosive cladding method

Abstract

The invention discloses a structure and process for preparing a silver-nickel alloy-pure aluminum contact through an explosive cladding method, and the structure comprises the steps: sequentially and horizontally placing a base layer pure aluminum plate, a composite layer silver-nickel alloy-pure aluminum composite plate, a carbon steel driving plate and an explosive box in which explosives are placed on a foundation from bottom to top, and inserting a detonator into the explosive box; a gap supporting column is arranged between the base layer pure aluminum plate and the composite layer silver-nickel alloy-pure aluminum composite plate. The area of the base layer pure aluminum plate is larger than that of the multi-layer silver-nickel alloy-pure aluminum composite plate; the thickness of the base layer pure aluminum plate is larger than that of the multi-layer silver-nickel alloy-pure aluminum composite plate. And the area of the carbon steel driving plate is larger than that of the multilayer silver-nickel alloy-pure aluminum composite plate. The carbon steel plate large in mass and area is adopted as a driving plate to receive explosive explosion energy, thin and small-area silver-nickel alloy is driven to be subjected to explosive cladding with a large-area and thick pure aluminum matrix, no intermetallic compound transition zone exists on the composite material bonding surface, the interface is clean, and the composite material has excellent conductivity and mechanical property and long service life.

Description

technical field [0001] The invention relates to the technical field of metal welding, in particular to a structure and process for preparing a silver-nickel alloy-pure aluminum contact by an explosive composite method. Background technique [0002] Silver-nickel alloys (generally 5% to 40% nickel) have good electrical and thermal conductivity, strong resistance to metal transfer, arc burning, electrical erosion, etc., good wear resistance, high strength, and good ductility Therefore, it is widely used as a contact material for power components such as switches, controllers, voltage regulators, circuit breakers, etc. In the environment of high current use, the cathode aluminum busbar needs to be connected with the silver-nickel alloy contact material. When the mechanical connection method of crimping is used, a large contact resistance will be generated and the conductivity of the element will be reduced. In addition, Ag and Ni both form brittle metal compound phases with al...

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