Preparation method of high-densification tungsten-copper refractory alloy

• Main Authors: ZHANG ZAN, GAO YANG, ZHANG RUI, TANG GAOPENG, ZHAO JUNLIANG, GUO XIAOQIN, GAO KA, FAN LEI, SUN DEJIAN
• Format: Patent
• Language: Chinese; English
• Published: 17.04.2020
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a preparation method of a high-densification tungsten-copper refractory alloy. The preparation method comprises the following steps: (1) putting prefabricated powder obtained by mixing tungsten powder and copper powder into a high-purity graphite pressing mold coated with a boron nitride coating; (2) performing cold pressing molding on the graphite pressing mold in the step(1); and (3), placing the graphite pressing mold filled with the sample and subjected to cold pressing forming in the step (2) into an oscillation pressure sintering furnace cavity for sintering to obtain the finished product. The mode of oscillating pressure sintering is adopted, so that the tungsten-copper alloy is subjected to multi-field coupling action of a thermal field and a force field inthe heat-insulating graphite mold to form a copper mesh which fills gaps of tungsten particles, and powder rearrangement, liquid phase flow and air hole discharge are promoted under the action of circulating pressure, solidif