中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 29 No. 10 October 2019 |
（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
