Effects of Cr3C2 content on microstructure and mechanical properties of hot-pressed sintered WC based cemented carbides
YUAN Yulan1,2, LIU Hanlian1,2, HUANG Chuanzhen3, LIU Yang1,2, WANG Limei1,2, JI Lianggang1,2
1. School of Mechanical Engineering, Shandong University, Jinan 250061, China; 2. Key Laboratory of High-efficiency and Clean Mechanical Manufacture, Ministry of Education, Center for Advanced Jet Engineering Technologies (CaJET), Shandong University, Jinan 250061, China; 3. School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China;
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
袁玉兰，刘含莲，黄传真，刘洋，王利梅，季良刚. Effects of Cr3C2 content 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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2023, Vol. 28 
