The eutectic carbides and creep rupture strength of 25Cr20Ni heat-resistant steel tubes centrifugally cast with different solidification conditions

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	The eutectic carbides and creep rupture strength of 25Cr20Ni heat-resistant steel tubes centrifugally cast with different solidification conditions
	X. Q. Wu; H. M. Jing; Y. G. Zheng; Z. M. Yao; W. Ke; Z. Q. Hu
	2000
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	293 期号:1-2 页码:252-260
摘要	The eutectic carbides and creep rupture strength of 25Cr20Ni heat-resistant steel tubes centrifugally cast with different solidification conditions were investigated in detail. The results reveal that the eutectic carbides precipitated primarily at the dendrite and grain boundaries show various morphologies from the outer wall to the inner wall along radial direction of the cast tubes, consisting of the thin film-like carbides, the blocky carbides, the lamellar carbide clusters resembling the pearlite and the skeleton-like carbides. The initial solidification conditions have significant influences on the grain morphologies and the distribution of the eutectic carbides in the cast tubes. Increasing the cooling rate markedly promotes the development of the columnar grains and restrains the precipitation of the eutectic carbides, while an applied electromagnetic field during the centrifugal solidification induces a notable grain refining and a marked change of the precipitation zones of the eutectic carbides from the dendrite boundaries to the grain boundaries. The applied electromagnetic markedly improves the creep rupture strength of the centrifugal cast 25Cr20Ni heat-resistant steel tubes. The relationships between the initial solidification conditions and the solidification processes as well as the creep rupture strength were discussed at length. (C) 2000 Elsevier Science S.A. All rights reserved.
部门归属	chinese acad sci, met res inst, state key lab corros & protect, shenyang 110015, peoples r china.;wu, xq (reprint author), chinese acad sci, met res inst, state key lab corros & protect, 62 wencui rd, shenyang 110015, peoples r china
关键词	Heat-resistant Steel Tubes Centrifugal Solidification Electromagnetic Field Eutectic Carbides Creep Rupture Strength Cooling Curves Alloy Microstructure Field
URL	查看原文
WOS记录号	WOS:000089488800033
引用统计	被引频次：41[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/321006/37211
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. Q. Wu,H. M. Jing,Y. G. Zheng,et al. The eutectic carbides and creep rupture strength of 25Cr20Ni heat-resistant steel tubes centrifugally cast with different solidification conditions[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2000,293(1-2):252-260.
APA	X. Q. Wu,H. M. Jing,Y. G. Zheng,Z. M. Yao,W. Ke,&Z. Q. Hu.(2000).The eutectic carbides and creep rupture strength of 25Cr20Ni heat-resistant steel tubes centrifugally cast with different solidification conditions.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,293(1-2),252-260.
MLA	X. Q. Wu,et al."The eutectic carbides and creep rupture strength of 25Cr20Ni heat-resistant steel tubes centrifugally cast with different solidification conditions".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 293.1-2(2000):252-260.