Sintering behavior and mechanical properties of Cr3C2 doped ultra-fine WC-Co cemented carbides: Experment guided with thermodynamic calculations |
| |
| Affiliation: | 1. State Key Lab of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China;2. College of Metallurgy and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China;3. Hunan Provincial Key Defense Laboratory of High Temperature Wear-Resisting Materials and Preparation Technology, Hunan University of Science and Technology, Xiangtan 411201, China;1. Materials & Coating Development Center, Research & Development Division, Advanced Materials & Tools Company, Mitsubishi Materials Corporation, 1511 Furumagi, Joso-shi, Ibaraki 300-2795, Japan;2. Research & Development Division, Advanced Materials & Tools Company, Mitsubishi Materials Corporation, 3–2, Otemachi 1-chome, Chiyoda-ku, Tokyo 100-8117, Japan;1. Institute of Engineering Innovation, The University of Tokyo, 2-11-16, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan;2. WPI Advanced Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai-shi, Miyagi 980-8577, Japan;3. Tsukuba Plant, Mitsubishi Materials Corp., 1511 Furumagi, Joso-shi, Ibaraki 300-2795, Japan;4. Japan New Metals Co., Ltd., 1-6-64, Sen-nari-cho, Toyonaka-shi, Osaka, Japan;5. Japan Fine Ceramics Center, 2-4-1, Rokuno, Atsuta-ku, Nagoya 456-8587, Japan;6. Department of Quantum Engineering, Nagoya University, Furou-cho, Chidane-ku, Nagoya-shi, Aichi 464-8603, Japan;1. Chalmers University of Technology, 412 96 Göteborg, Sweden;2. Royal Institute of Technology, 100 44 Stockholm, Sweden;3. Sandvik, 126 80 Stockholm, Sweden;1. Materials Science and Engineering, KTH Royal Institute of Technology, Brinellv. 23, 100 44 Stockholm, Sweden;2. Sandvik Coromant R&D, Lerkrogsv. 19, 126 79 Stockholm, Sweden;3. Seco Tools AB, Björnbacksv. 2, 737 82 Fagersta, Sweden;4. Å?ngström Tribomaterials Group, Applied Materials Science, Uppsala University, Lägerhyddsv. 1, 751 21 Uppsala, Sweden |
| |
| Abstract: | The influence of Cr3C2 doping on the sintering process and mechanical properties of WC-Co cemented carbides was studied. Using differential thermal analysis of green powders and thermodynamic calculations, the disappearing temperature of solid-state binder phase in the ultra-fine WC-Co cemented carbides with different amounts of Cr3C2 dopant was first investigated and then verified to descend with the increase of Cr content. Based on these investigations, the sintering temperatures of three alloys with 0.3, 0.5 and 0.65 wt% Cr were selected to high by 50 °C than the phase disappearing temperature of solid-state binder. Compared with the commercial sample with the sintering temperature at 1410 °C for Cr3C2 doped WC-Co cemented carbides, the optimized sintering temperatures lead to finer microstructures and better mechanical properties, such as transverse rupture strength and hardness. In addition, the reliability for the performance of WC-Co cemented carbides prepared with the optimized sintering schedule is significantly improved in comparison with the commercial sample. The strategy from the present work can be used to design sintering process parameters during the manufacture of ultrafine WC-Co cemented carbides. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
