Development of Low Segregation Technology
Zhang Yutuo1,2; Chen Bo2,3; Liu Kui2,3; Li Dianzhong2,3; Li Yiyi2,3
Corresponding AuthorLi Yiyi(
AbstractThe minor element in alloy greatly aggravate the segregation of main elements and formation of harmful phase, resulting the deterioration of mechanical properties. Low segregation technology of cast superalloy was pioneered by Prof. Shi Changxu and co-workers in the early eighties. The technology is to control the content of minor element, such as P, Si, B and Zr, to lower the solidification segregation in the super-alloy. The working temperature and mechanical properties of superalloy can be increased greatly by using the low segregation technology. A series of alloys, such as M17 and GH738 with low segregation and excellent properties, had been developed. This study extends low segregation technology to 30Cr2Ni4MoV steel of large shaft for thermal power equipment, 690 alloy for steam generator tube in nuclear power plant, and uranium alloy for nuclear fuel. The solidification and segregation behaviour in the 30Cr2Ni4MoV steel was investigated, it is found that the minor elements of O and Al are essential for the formation of serious solidification segregation in the steel. Moreover, the solidification behavior of 690 alloy has been studied. S and N increases solidification interval, and the effect of S is greater than that of N. The solidification segregation of 690 alloy can be alleviated by controlling the contents of the S and N. Finally, the solidification temperature interval of high carbon uranium is calculated. With the carbon content increasing from 0.01% to 0.03%, the solidification interval is from 40 degrees C to 75 degrees C. Thus, for the radioactive uranium alloys, minor elements show segregation to some extent in the residual liquids of final solidification zone. The minor elements in U-6Nb alloy are C, N and O. For uranium with high carbon content, the minor elements are C and O.
Keywordsegregation low segregation technology minor element solidification interval
Indexed BySCI
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000399922300006
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLi Yiyi
Affiliation1.Shenyang Ligong Univ, Coll Mat Sci & Engn, Shenyang 110159, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhang Yutuo,Chen Bo,Liu Kui,et al. Development of Low Segregation Technology[J]. ACTA METALLURGICA SINICA,2017,53(5):559-566.
APA Zhang Yutuo,Chen Bo,Liu Kui,Li Dianzhong,&Li Yiyi.(2017).Development of Low Segregation Technology.ACTA METALLURGICA SINICA,53(5),559-566.
MLA Zhang Yutuo,et al."Development of Low Segregation Technology".ACTA METALLURGICA SINICA 53.5(2017):559-566.
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