Effects of Re-Melting Processes on the Tensile Properties of K452 Alloy at High Temperature

doi:10.11900/0412.1961.2016.00286

CORC > 金属研究所 > 中国科学院金属研究所

	Effects of Re-Melting Processes on the Tensile Properties of K452 Alloy at High Temperature
	Yang Jinxia 1; Xu Futao 1; Zhou Donglin 2; Sun Yuan 1; Hou Xingyu 1; Cui Chuanyong 1
刊名	ACTA METALLURGICA SINICA
	2017-06-01
卷号	53 期号:6 页码:703-708
关键词	superalloy tensile property shrinkage
ISSN号	0412-1961
DOI	10.11900/0412.1961.2016.00286
通讯作者	Yang Jinxia(jxyang@imr.ac.cn)
英文摘要	K452 alloy is a nickel-based cast superalloy having the good tensile properties at high temperature and excellent corrosion resistance. It has been applied as a blade material of engines when environmental temperature is not above 950 degrees C. It is found that the tensile properties of the alloy have become more scattered and unstable although its chemical compositions are not changed. Hence, the tensile properties of the alloy were studied in order to increase its stability at high temperature and improve its applied properties. Tensile specimens were prepared using the different re-melting processes. Tensile tests were done at 900 degrees C. When the pouring temperature was 1430 degrees C, tensile properties were not only lower than expected, but also had great degree of dispersion, i.e., the vales of ultimate strengths changed in the range of 410 MPa and 510 MPa, and the elongations changed in the range of 3.5% and 22.0%, the average contents of O and N were the highest among three tested conditions. The highest N content was 0.0028%. And the shrinkage area was higher than those in other two re-melting processes. When the pouring temperature was 1500 degrees C, the tensile properties were improved, and their changing scopes became small, the average contents of O and N decreased, the shrinkage area decreased. When the refining temperature was 1590 degrees C and the holding time was 5 min, both average contents of O and N were decreased greatly, the shrinkage was not seen in the fracture surfaces. And the tensile properties were improved. Furthermore, their changing scopes were very small.
资助项目	National Natural Science Foundation of China[11332010]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000405561500008
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/124704]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang Jinxia
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Harbin Dongan Engine Grp Corp LTD, Harbin 150066, Peoples R China
推荐引用方式 GB/T 7714	Yang Jinxia,Xu Futao,Zhou Donglin,et al. Effects of Re-Melting Processes on the Tensile Properties of K452 Alloy at High Temperature[J]. ACTA METALLURGICA SINICA,2017,53(6):703-708.
APA	Yang Jinxia,Xu Futao,Zhou Donglin,Sun Yuan,Hou Xingyu,&Cui Chuanyong.(2017).Effects of Re-Melting Processes on the Tensile Properties of K452 Alloy at High Temperature.ACTA METALLURGICA SINICA,53(6),703-708.
MLA	Yang Jinxia,et al."Effects of Re-Melting Processes on the Tensile Properties of K452 Alloy at High Temperature".ACTA METALLURGICA SINICA 53.6(2017):703-708.