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Solidification microstructure of Cr4Mo4V steel forged in the semi-solid state
Liu, Weifeng1,2,3; Cao, Yanfei3; Guo, Yifeng3; Sun, Mingyue1,3; Xu, Bin1,3; Li, Dianzhong3
Corresponding AuthorSun, Mingyue(mysun@imr.ac.cn)
2020-02-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume38Pages:170-182
AbstractSemi-solid forging of iron-based alloys during solidification has unique characteristics distinct from those of the classical hot forging. With the aim of acquiring precise knowledge concerning the microstructural evolution of bearing steel Cr4Mo4V in this process, a series of semi-solid forging experiments were carried out in which samples were wrapped in a designed pure iron sheath. The effects of forging temperature and forging reduction on the grain morphology and liquid flow behavior were investigated, respectively. By forging solidifying metal (FSM), bulky primary dendrites were broken and spheroidal grains with an average shape factor of 0.87 were obtained at 1360 degrees C. With the decreasing forging temperature to 1340 degrees C, the microstructural homogeneity can be improved. On the other hand, it shows that a higher forging reduction (50%) is essential for the spheroidization of grains and elimination of liquid segregation. Those microstructural characteristics are related to different motion mechanisms of solid and liquid phases at different forging temperatures. Additionally, the effect of semi-solid forging on the eutectic carbides was also investigated, and the results demonstrate that the higher diffusion capacity and less liquid segregation jointly lower the large eutectic carbides and consequently cause its uniform distribution during FSM. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordSolidification Semi-solid forging Microstructure Eutectic carbides
Funding OrganizationNational KeyResearch and Development Program ; National Natural Science Foundation of China ; National Science and TechnologyMajor Project of China ; Key Programof the Chinese Academy of Sciences ; Program of CAS Interdisciplinary Innovation Team
DOI10.1016/j.jmst.2019.07.049
Indexed BySCI
Language英语
Funding ProjectNational KeyResearch and Development Program[2018YFA0702900] ; National Natural Science Foundation of China[U1508215] ; National Natural Science Foundation of China[51774265] ; National Natural Science Foundation of China[51701225] ; National Science and TechnologyMajor Project of China[2019ZX06004010] ; Key Programof the Chinese Academy of Sciences[ZDRW-CN-2017-1] ; Program of CAS Interdisciplinary Innovation Team
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000503164100019
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136561
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 Assessment, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Coll Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Liu, Weifeng,Cao, Yanfei,Guo, Yifeng,et al. Solidification microstructure of Cr4Mo4V steel forged in the semi-solid state[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,38:170-182.
APA Liu, Weifeng,Cao, Yanfei,Guo, Yifeng,Sun, Mingyue,Xu, Bin,&Li, Dianzhong.(2020).Solidification microstructure of Cr4Mo4V steel forged in the semi-solid state.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,38,170-182.
MLA Liu, Weifeng,et al."Solidification microstructure of Cr4Mo4V steel forged in the semi-solid state".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 38(2020):170-182.
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