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Characteristics and transformation of primary carbides during austenitization in Cr4Mo4V bearing steel
Liu, Weifeng1,2,3; Cao, Yanfei3; Guo, Yifeng4; Xu, Bin1,3; Sun, Mingyue1,3; Li, Dianzhong3
Corresponding AuthorSun, Mingyue(mysun@imr.ac.cn)
2020-11-01
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume169Pages:11
AbstractThe characteristics and transformation of M2C and MC, the most common primary carbides in Cr4Mo4V bearing steel, have been investigated via scanning electron microscopy, energy dispersive spectrometry and X-ray dif-fraction at high austenitization temperatures. It was first found that the transformation of rod-like M2C and spherical MC primary carbides during heating occurs at approximately 1180 and 1200 degrees C, respectively. In the transformation process of M2C, the periphery first transforms into an MC-type carbide, and then the internal untransformed M2C and newly-formed MC-type melt, and re-solidify in a M2C" eutectic carbide structure with a composition change and a finer lamellar spacing. In contrast, MC carbides melt directly with the re-solidified product also being constituted of finer M2C" eutectic carbides. The transformation process is controlled by the diffusion of alloying elements Mo and V, while the matrix provides Fe for the formation of M2C". In addition to elucidate the transformation mechanisms, this study also highlights the essential effect of the melting matrix on the modification of primary M2C and MC carbides in Cr4Mo4V steel.
KeywordCr4Mo4V steel Primary carbide Melting Re-solidification Microstructure evolution Transformation mechanism
Funding OrganizationNational Key Research and Development Program ; National Natural Science Foundation of China ; National Science and Technology Major Project of China ; Program of CAS Interdisciplinary Innovation Team ; Youth Innovation Promotion Association, CAS
DOI10.1016/j.matchar.2020.110636
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program[2018YFA0702900] ; National Natural Science Foundation of China[51774265] ; National Natural Science Foundation of China[51701225] ; National Science and Technology Major Project of China[2019ZX06004010] ; Program of CAS Interdisciplinary Innovation Team ; Youth Innovation Promotion Association, CAS
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS IDWOS:000585225500002
PublisherELSEVIER SCIENCE INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141307
Collection中国科学院金属研究所
Corresponding AuthorSun, Mingyue
Affiliation1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Coll Mat Sci & Engn, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
4.Shanghai Univ, State Key Lab Adv Special Steels, Shanghai 200072, Peoples R China
Recommended Citation
GB/T 7714
Liu, Weifeng,Cao, Yanfei,Guo, Yifeng,et al. Characteristics and transformation of primary carbides during austenitization in Cr4Mo4V bearing steel[J]. MATERIALS CHARACTERIZATION,2020,169:11.
APA Liu, Weifeng,Cao, Yanfei,Guo, Yifeng,Xu, Bin,Sun, Mingyue,&Li, Dianzhong.(2020).Characteristics and transformation of primary carbides during austenitization in Cr4Mo4V bearing steel.MATERIALS CHARACTERIZATION,169,11.
MLA Liu, Weifeng,et al."Characteristics and transformation of primary carbides during austenitization in Cr4Mo4V bearing steel".MATERIALS CHARACTERIZATION 169(2020):11.
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