Preparation method of CuW/CrCu integral high-voltage electrical contacts

一种制备CuW/CrCu整体高压电触头的方法

Abstract

本发明公开的一种制备CuW/CrCu整体高压电触头的方法,首先按质量百分比为1~1.5∶0.001~0.01取CuW粉末和CrCu粉末混粉,然后采用一种冷模,包括相分离的内部为空腔的上模和内部为空腔的下模,上模和下模之间设置有可拆卸的垫片,下模内部空腔内设置有可拆卸的型芯b,在冷模中压制钨骨架,后在圆柱坩埚内熔渗烧结,再采用一种热模,包括内部为空腔的外模,外模内部空腔内设置有可拆卸的型芯a,在热模中熔渗烧结,再放入冷模中压制法兰,机加工后得到CuW/CrCu整体高压电触头。本发明制备CuW/CrCu整体高压电触头的方法在烧结时使用具有型芯结构的冷模和热模,从而无需加工成实体后再进行机加工,达到节省材料的目的。
The invention discloses a preparation method of CuW/CrCu integral high-voltage electrical contacts, which includes the following steps of: firstly taking and mixing CuW powder and CrCu powder with the mass percentage of 1 to 1.5:0.001 to 0.01 and then adopting a cold mold and a hot mold; wherein the cold mold comprises an upper mold and a lower mold which are separated and have a cavity in the interior; a dismountable gasket is arranged between the upper mold and the lower mold; a dismountable mold core b is arranged in the interior cavity of the lower mold; a tungsten skeleton is pressed in the cold mold and the infiltration and sintering are carried out in a cylindrical pot; the hot mold comprises an external mold with a cavity in the interior, and a dismountable mold core a is arranged in the cavity of the interior of the external mold, infiltrated and sintered in the hot mold and then is put into the cold mold for pressing a flange; and then the CuW/CrCu integral high-voltage electrical contacts are obtained after machining. The preparation method of CuW/CrCu integral high-voltage electrical contacts uses the hot mold and cold mold with the mold core structure in sintering with no need of being machined after being processed into entity, thus achieving the purpose of saving materials.

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