| Autor: |
Jinghong Chen, Huaxin Hu, Haibin Wang, Xiaoyan Song, Hao Lu, Gaochao Wu, Xuemei Liu, Zhi Zhao, Chao Liu, Feng Hao |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Journal of Alloys and Compounds. 894:162449 |
| ISSN: |
0925-8388 |
| DOI: |
10.1016/j.jallcom.2021.162449 |
| Popis: |
The effect of the WCoB addition on the wear resistance of the ultra-coarse WC-8Co cemented carbides was studied by experiments and finite element simulations. The results showed that with the increase of the WCoB content, the wear resistance of the ultra-coarse cemented carbides was greatly improved. The cemented carbide containing 1.0 wt.% WCoB had a friction coefficient of 0.281 and a wear rate of 0.77 × 10−6 mm3/N⋅m, which was 72% and 46% of those of the WC-8Co counterpart. The reason of the significant reduction of the friction coefficient and wear rate was analyzed. WCoB with high hardness distributed homogeneously at WC/WC and WC/Co interfaces, which led to relatively homogeneous distribution of the stress in WC grains and supported the WC grains after Co removal. Consequently, the probability of brittle fracture and pull-out of the WC grains during wear process of the cemented carbides was decreased. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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