Effect of ball-milling process in combination with the addition of carbide microparticles on the microstructure and wear resistance of a Co–Cr–W alloy prepared by powder metallurgy method

doi:10.1088/2053-1591/ac021f

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	Effect of ball-milling process in combination with the addition of carbide microparticles on the microstructure and wear resistance of a Co–Cr–W alloy prepared by powder metallurgy method
	Wang,S Y 1; Hou,X Y 1; Wang,L 1; Zhang,H Y 1; Zhang,W B 2; Xia,Y P 2; Sun,Y 1; Zhou,Y Z 1
刊名	Materials Research Express
	2021-06-01
卷号	8 期号:6
关键词	Co–Cr–W alloy carbides powder metallurgy microstructure wear resistance
DOI	10.1088/2053-1591/ac021f
通讯作者	Zhou,Y Z()
英文摘要	Abstract Co–Cr–W alloys were widely used in the inlet exhaust valve of aeroengine. However, the traditional manufacturing process of Co–Cr–W alloys can not meet the demand for higher comprehensive performance, and an optimum method needs to be developed. Herein, a Co–Cr–W alloy reinforced by exogenous carbides was prepared by the powder metallurgy method. Effect of ball-milling time on the microstructure and wear resistance of the alloy was investigated, and the formation mechanisms of the reinforcing phases were discussed. Results showed that with prolonging the ball-milling time, the uniformity of the reinforcing phases was improved, grain refinement was achieved, the hardness increased, a suitable bonding interface was formed between the matrix and reinforcing phases, and better wear resistance was thus achieved. However, when the ball-milling time increased from 60 h to 70 h, local segregation of the reinforcing phases occurred, the hardness decreased from 64 HRC to 60 HRC, and the friction coefficient increased from 0.53 to 0.58. Based on our experimental results, we proposed two formation mechanisms of the reinforcing phases (carbides): In-situ precipitation from the matrix and in situ autogenic reaction between the elements of the matrix and the added carbides (WC and Cr3C2 particles). Both mechanisms contributed to the formation of M23C6 and M6C carbides. Our results underscore the importance of added reinforcing phases and help to optimize the ball-milling process in preparing the Co–Cr–W alloys.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:2053-1591-8-6-AC021F
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/159428]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhou,Y Z
作者单位	1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China 2.Zhuzhou Cemented Carbide Works Imp. & Exp. Co., Ltd, Zhuzhou 412000, People’s Republic of China
推荐引用方式 GB/T 7714	Wang,S Y,Hou,X Y,Wang,L,et al. Effect of ball-milling process in combination with the addition of carbide microparticles on the microstructure and wear resistance of a Co–Cr–W alloy prepared by powder metallurgy method[J]. Materials Research Express,2021,8(6).
APA	Wang,S Y.,Hou,X Y.,Wang,L.,Zhang,H Y.,Zhang,W B.,...&Zhou,Y Z.(2021).Effect of ball-milling process in combination with the addition of carbide microparticles on the microstructure and wear resistance of a Co–Cr–W alloy prepared by powder metallurgy method.Materials Research Express,8(6).
MLA	Wang,S Y,et al."Effect of ball-milling process in combination with the addition of carbide microparticles on the microstructure and wear resistance of a Co–Cr–W alloy prepared by powder metallurgy method".Materials Research Express 8.6(2021).