Cr<sub>3</sub>C<sub>2</sub>含量对热压烧结WC基硬质合金材料微观组织和力学性能的影响

doi:10.19976/j.cnki.43-1448/TF.2022078

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Abstract In order to develop cemented carbide tool materials with high strength and high hardness, WC-based cemented carbides with different Cr₃C₂ contents were prepared by vacuum hot-pressed sintering technology. The phase compositions and microstructures of the WC-based cemented carbides were studied by XRD, SEM, and EDS. The effect of Cr₃C₂ content on the mechanical properties and microstructures of WC-based cemented carbide were investigated as well. The results show that appropriate amount of Cr₃C₂ can effectively inhibit the abnormal growth of WC grains, improve grain uniformity, reduce microstructure defects, and improve its comprehensive mechanical properties. With the increase of Cr₃C₂ content, the hardness and bending strength of the alloys increase firstly and then decrease, and the fracture toughness first decreases and then increases. When the mass fraction of Cr₃C₂ is 0.4%, the WC based cemented carbide has the best comprehensive mechanical properties, with the hardness (HV) of

Received: 11 October 2022 Published: 23 March 2023

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	袁玉兰，刘含莲，黄传真，刘洋，王利梅，季良刚

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袁玉兰，刘含莲，黄传真，刘洋，王利梅，季良刚. Effects of Cr₃C₂content on microstructure and mechanical properties of hot-pressed sintered WC based cemented carbides[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(1): 55-62.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022078 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I1/55

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