碳化钨基硬质合金的制备与力学性能研究

doi:10.3976/j.issn.1002-4026.2018.03.005

Abstract

Abstract:

A certain amount of cobalt, tantalum carbide and hafnium carbide powder were added to tungsten carbide powder to prepare a cemented carbide sample through mixing, ball milling, cold forming and hot pressing sintering. The hardness, bending strength, impact toughness, and micromorphology of the specimens were studied using a 1 000 N dimensional microhardness tester, a threepoint bending test, an XJJ-5 impact tester, and a scanning electron microscope, then the mechanism of improving the mechanical properties of the specimen was discussed. The results show that the addition of hafnium carbide can effectively improve the sintering quality, inhibit the growth of tungsten carbide grains and improve the mechanical properties of the samples. The samples with hafnium carbide content of 2% have the best mechanical properties.

Key words: mechanical properties, powder metallurgy, hafnium carbide, cemented carbide

CLC Number:

TB331

YAN Xin-yu, WANG Shou-ren，WANG Yong. Preparation and mechanical properties of tungsten carbidebased cemented carbides[J].SHANDONG SCIENCE, 2018, 31(3): 28-33.

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Preparation and mechanical properties of tungsten carbidebased cemented carbides

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