Research on Effects of Deformation Methods on Density and Reinforcement Mechanism of Molybdenum Powders AITranslate

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Chinese Library Classification Number:TG379[金属学及工艺—金属压力加工]

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The molybdenum powders were put into the tube and heated to 500℃,and then two pass A-route equal channel angular pressing(ECAP)or hot pressing experiments were carried out.Particle morphology,pore distribution and microhardness were compared of the molybdenum powders from different pressing methods.The results show that after two pass ECAP,pore distribution of the sample is more uniform,and both particle deformation degree and microhardness are higher.After hot pressing,pore distribution of the sample is nonuniform,its density at the upper end is higher than that at the down end,and its particle deformation degree is small.During hot pressing,pressing force cannot result in brittle fracture of the particles,so the sample has lower microhardness than the sample processed by equal channel angular pressing.