Method for manufacturing copper-tungsten contact

Abstract

The invention discloses a method for manufacturing a copper-tungsten contact. The method comprises the following steps of: manufacturing a tungsten blank; manufacturing a graphite crucible; drying the graphite crucible; protecting the graphite crucible; preparing cupriferous materials; mounting the crucible; charging, vacuumizing, heating and infiltrating; and cooling and discharging, and the like. The specially-made graphite crucible is used for containing materials in a vacuum environment; copper or chromiumbronze solution is sufficiently infiltrated in the tungsten blank by using a vacuum negative-pressure infiltration method to manufacture the contact; the melting point of copper is reduced in the vacuum environment; the cupriferous materials are easy to infiltrate into the tungsten blank and are fused with the tungsten blank sufficiently and uniformly; the total usability and the yield of the copper-tungsten contact are increased; and manufacture difficulty that the diameter of the copper-tungsten contact is too large and the copper-tungsten contact is too long is overcome.

Description

technical field [0001] The invention relates to a manufacturing method of a copper-tungsten contact. Background technique [0002] At present, copper-tungsten integral contacts generally have the following defects: (1) The copper phase of the copper-tungsten alloy part is insufficient or missing, resulting in serious ablation during the use of the contact; (2) The bonding strength between the copper-tungsten alloy part and the copper or chrome bronze part Insufficient, resulting in breakage of the contacts during use; (3) The chromium content of the chrome bronze part is low, and the strength of the contacts is low, resulting in insufficient clamping force of the moving contacts and easy bending of the static contacts during the use of the contacts ; (4) During the sintering process of the copper-tungsten integral contact, if the length of the contact is too long or the diameter is too large, it is more difficult to sinter and form the whole. Contents of the invention [...

AI Technical Summary

Problems solved by technology

[0002] At present, the copper-tungsten integral contact generally has the following defects: (1) The copper phase of the copper-tungsten alloy part is insufficient or missing, resulting in severe ablation during the use of the contact; (2) The bonding strength between the copper-tungsten alloy part and the copper or chrome bronze part Insufficient, resulting in breakage of the contacts during use; (3) The chromium content of the chrome bronze part is low, and the strength of the contacts is low, resulting in insufficient clamping force of the moving contacts and easy bending of the static contacts during the use of the contacts ; (4) During the sintering process of the copper-tungsten integral contact, if the length of the contact is too long or the diameter is too large, the overall sintering and forming is more difficult