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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
Corresponding AuthorSun, Y.(yuansun@imr.ac.cn) ; Zhou, Y. Z.(yzzhou@imr.ac.cn)
2021-06-01
Source PublicationMATERIALS RESEARCH EXPRESS
Volume8Issue:6Pages:13
AbstractCo-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.
KeywordCo-Cr-W alloy carbides powder metallurgy microstructure wear resistance
Funding OrganizationNational Natural Science Foundation of China
DOI10.1088/2053-1591/ac021f
Indexed BySCI
Languageen
Funding ProjectNational Natural Science Foundation of China[51801206]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000657106400001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160300
Collection中国科学院金属研究所
Corresponding AuthorSun, Y.; Zhou, Y. Z.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Zhuzhou Cemented Carbide Works Imp & Exp Co Ltd, Zhuzhou 412000, Peoples R China
Recommended Citation
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):13.
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),13.
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):13.
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