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Effects of Re-Melting Processes on the Tensile Properties of K452 Alloy at High Temperature
Yang Jinxia1; Xu Futao1; Zhou Donglin2; Sun Yuan1; Hou Xingyu1; Cui Chuanyong1
Corresponding AuthorYang Jinxia(jxyang@imr.ac.cn)
2017-06-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume53Issue:6Pages:703-708
AbstractK452 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.
Keywordsuperalloy tensile property shrinkage
Funding OrganizationNational Natural Science Foundation of China
DOI10.11900/0412.1961.2016.00286
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[11332010]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000405561500008
PublisherSCIENCE PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/124707
Collection中国科学院金属研究所
Corresponding AuthorYang Jinxia
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Harbin Dongan Engine Grp Corp LTD, Harbin 150066, Peoples R China
Recommended Citation
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.
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