ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 29    No. 10    October 2019

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Effect of jet milling on micro-strain behavior and rupture behavior of agglomerates of ultrafine WC powders
Ya-li SUN1,2, Qing-cai LIU1, Xin HUANG1,3, Fa-xing ZHANG3, Jian YANG1, Hua MEI4
(1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
2. College of Materials Science and Engineering, Sichuan University of Science and Engineering,
Zigong 643000, China;
3. College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, China;
4. Zhuzhou Cemented Carbide Cutting Tools Co., Ltd., Zhuzhou 412007, China
)
Abstract: The Williamson-Hall and uniaxial compression methods were used to study the variations of the micro-strain and stress-strain relations in WC powders after jet milling and ball milling, respectively. The rupture behavior of agglomerates in WC powders was investigated. Meanwhile, the as-obtained WC powders treated by different milling methods were used to fabricate WC-10%Co cemented carbides, followed by the performance assessment of cemented carbides. The results show that the micro-strain of the jet-milled WC powders decreases significantly compared with that of the ball-milled WC powders, and that the cemented carbides prepared by jet-milled WC powders exhibit excellent properties with a transverse-rupture strength of 4260 MPa, due to the elimination of agglomerates and the reduction of lattice strain.
Key words: ultrafine WC powder; micro-strain; stress-strain relation; jet milling; agglomerate rupture mechanism
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
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