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EFFECTS OF SOLUTION TREATMENT ON MICROSTRUCTURE AND WEAR-RESISTANT PROPERTIES OF CoCrW ALLOYS
He Bo1; Nie Qingwu1; Zhang Hongyu2; Wei Hua2
Corresponding AuthorWei Hua(hwei@imr.ac.cn)
2016-04-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:4Pages:484-490
AbstractCoCrW alloy is a kind of stellite alloy, which has high strength, good wear resistance, and is widely used in aviation industry, nuclear industry and other fields. For a long time, the CoCrW alloy is mainly used as coating to have an effect on wear and the corrosion resistance. With the development of the industry, the conventional cast CoCrW alloy has been widely studied. The mechanical properties of the cast CoCrW alloy can be changed by heat treatment, which is of high hardness and great brittleness. In this work, hardness and wear resistant properties of the CoCrW alloys as-cast and after solution treatment were studied by combining XRD, SEM, EDS, hardness test and wear resistance test, and effects of the solution temperature on the microstructure and wear-resistant properties were also investigated. The results showed that the microstructures of the CoCrW alloys as-cast and after solution treatment were both composed of M23C6, M6C and gamma-Co matrix, but the size, morphology and distribution of carbides occurred in the alloy changed obviously by solution treatment. The dissolution of a large amount of carbides in the alloy after solution treatment was mainly responsible for the decrease in hardness and wear resistance of the alloy compared with that of the as-cast one. With the increase of the solution temperature, the Cr, W and other alloying elements in the carbides were dissolved into the gamma-Co matrix so as to strengthen the matrix resulting in the improvement of the hardness and the associated wear resistance of the alloy. The mechanism that controlling the wear-resistant property of CoCrW alloys as-cast and after solution treatment was the interaction of abrasive wear, adhesive wear and oxidation wear.
KeywordCoCrW alloy solution treatment hardness wear-resistant property
Funding OrganizationNational Natural Science Foundation of China ; Natural Science Foundation of Liaoning Province
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51201161] ; Natural Science Foundation of Liaoning Province[2013024011]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000374809600012
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/122091
Collection中国科学院金属研究所
Corresponding AuthorWei Hua
Affiliation1.Shenyang Aerosp Univ, Sch Mechatron Engn, Shenyang 110136, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
He Bo,Nie Qingwu,Zhang Hongyu,et al. EFFECTS OF SOLUTION TREATMENT ON MICROSTRUCTURE AND WEAR-RESISTANT PROPERTIES OF CoCrW ALLOYS[J]. ACTA METALLURGICA SINICA,2016,52(4):484-490.
APA He Bo,Nie Qingwu,Zhang Hongyu,&Wei Hua.(2016).EFFECTS OF SOLUTION TREATMENT ON MICROSTRUCTURE AND WEAR-RESISTANT PROPERTIES OF CoCrW ALLOYS.ACTA METALLURGICA SINICA,52(4),484-490.
MLA He Bo,et al."EFFECTS OF SOLUTION TREATMENT ON MICROSTRUCTURE AND WEAR-RESISTANT PROPERTIES OF CoCrW ALLOYS".ACTA METALLURGICA SINICA 52.4(2016):484-490.
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