Solidification microstructure of Cr4Mo4V steel forged in the semi-solid state

doi:10.1016/j.jmst.2019.07.049

CORC > 金属研究所 > 中国科学院金属研究所

	Solidification microstructure of Cr4Mo4V steel forged in the semi-solid state
	Liu, Weifeng 1,2,3; Cao, Yanfei 3; Guo, Yifeng 3; Sun, Mingyue 2,3; Xu, Bin 2,3; Li, Dianzhong 3
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2020-02-01
卷号	38 页码:170-182
关键词	Solidification Semi-solid forging Microstructure Eutectic carbides
ISSN号	1005-0302
DOI	10.1016/j.jmst.2019.07.049
通讯作者	Sun, Mingyue(mysun@imr.ac.cn)
英文摘要	Semi-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.
资助项目	National 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研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000503164100019
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136560]
专题	金属研究所_中国科学院金属研究所
通讯作者	Sun, Mingyue
作者单位	1.Univ Sci & Technol China, Coll Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 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.