合金添加剂对WC基硬质合金氧化行为及其关联特性的影响

doi:10.19976/j.cnki.43-1448/TF.2023042

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Abstract To explore the methods to improve the oxidation resistance at high temperature and the physical and mechanical properties simultaneously. Thus, this research designed WC-6Co-6Ni, WC-6Co-6Ni-1Cr₃C₂, WC-6Co- 6Ni-1CeO₂and WC-12Co-1CeO₂ WC-based cemented carbides, corresponding to alloys 1^#-4^#, respectively. The microstructure, physical and mechanical properties and oxidation behavior of the alloys at 700 ℃ for 16 h were investigated by comparison. The results show that the presence of rare earth-containing oxide dispersion phase in the alloy does not lead to the decrease of alloy strength, and the alloy hardness follows the coupling law of hardness, grain size and volume fraction of the phase components. The hardness of alloy 4^# is the highest, followed by alloy 2^#. The influence of Co and Ni binder metals on the hardness of cemented carbides is significant. Both Cr₃C₂and CeO₂ can significantly improve the oxidation resistance of the alloys at 700 ℃, but the improvement effect of Cr₃C₂ is better than that of CeO₂. The high temperature oxidation resistance and physical and mechanical properties of WC-based cemented carbide can be improved synchronously by adding appropriate amount of Cr₃C₂and CeO₂, and using Ni to partially replace Co.

Key words： cemented carbide rare earth microstructure property high temperature oxidation resistance

Received: 03 April 2023 Published: 06 July 2023

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	Articles by authors
	WANG Chunguang
	ZHANG Li
	HUANG Xiang
	NIE Renxin
	ZHONG Zhiqiang
	LONG Jiawei

Cite this article:

WANG Chunguang,ZHANG Li,HUANG Xiang, et al. Effects of alloy additives on oxidation behavior and correlative characteristics of WC-based cemented carbides[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(3): 296-304.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023042 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I3/296

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