STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL

doi:10.3724/SP.J.1037.2011.00157

IMR OpenIR

	STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL
	Li Shijian; Sun Mingyue; Liu Hongwei; Li Dianzhong
通讯作者	Li Dianzhong(dzli@imr.ac.cn)
	2011-07-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	47 期号:7 页码:946-953
摘要	Based on the measured stress-strain curves and thermo-physical data of 25Cr2Ni4MoV steel, a FEM model of void closure in heavy forging process was established through ABAQUS software. The void closure behaviors under different hot plasticity conditions have been investigated. The FEM results showed three distinct stages during the void closure. The voids with the same position in a cylindrical specimen close up at a similar height reduction ratio (Delta H/H(0)) around 25% at different temperatures, which indicates that the void closure is not sensitive to the deformation temperature. On basis of the FEM results, a physical-simulated experiment for void bonding process has been performed through compression tests on a hollow cylindrical specimens, with deformation temperatures ranging from 900 V to 1200 degrees C, Delta H/H(0) from 25% to 45% and a constant strain rate 0.01 s(-1). The experimental results have shown that the Delta H/H(0) for the void completely bonded at 1200, 1100 and 1000 degrees C are all about 35%, but increases to 45% when the deformation temperature decreased to 900 degrees C, which confirms that void bonding is a diffusion controlled process. Through the experimental results, it can be further demonstrated the high temperature combined with severe deformation can enhance the ability of atoms transition and decrease the micro-gap between contacted surfaces. Finally, the influencing factors on the bonding efficiency were investigated through SEM observation on the fractured surface of the tensile specimen with internal closed void.
关键词	steel 25Cr2Ni4MoV forging void healing bonding efficiency simulation
DOI	10.3724/SP.J.1037.2011.00157
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000294980700030
出版者	SCIENCE PRESS
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/104350
专题	中国科学院金属研究所
通讯作者	Li Dianzhong
作者单位	Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li Shijian,Sun Mingyue,Liu Hongwei,et al. STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL[J]. ACTA METALLURGICA SINICA,2011,47(7):946-953.
APA	Li Shijian,Sun Mingyue,Liu Hongwei,&Li Dianzhong.(2011).STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL.ACTA METALLURGICA SINICA,47(7),946-953.
MLA	Li Shijian,et al."STUDY ON VOID HEALING BEHAVIOR DURING FORGING PROCESS FOR 25Cr2Ni4MoV STEEL".ACTA METALLURGICA SINICA 47.7(2011):946-953.