Investigation into deoxidation during vacuum induction melting refining of nickel base superalloy using CaO crucible

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	Investigation into deoxidation during vacuum induction melting refining of nickel base superalloy using CaO crucible
	J. P. Niu; X. F. Sun; T. Jin; N. Yang; H. R. Guan; Z. Q. Hu
	2003
发表期刊	Materials Science and Technology
ISSN	0267-0836
卷号	19 期号:4 页码:435-439
摘要	The influence of carbon and aluminium on deoxidation during vacuum induction melting (VIM) of a Ni-6Cr2-Mo-6W -5Co alloy using a CaO crucible has been studied. It has been found that carbon plays a dominant role in deoxidation during the melting stage, and about 50-70%, of the initial oxygen can be removed. Thermodynamics calculations show that the C-O reaction is far from the equilibrium state, and experimental results for carbon and oxygen contents in the liquid alloy correspond with those when the CO partial pressure p(CO) is 10(3)-10(2) Pa. Aluminium addition can further reduce the oxygen content to below 6 ppm. Thermodynamics calculations for the C-Al, Al-CaO and C-Al2O3 reactions demonstrate that they can all take place during the melting process. These reactions bring about reductions in the amounts of carbon and aluminium, respectively, of about 1.3-3.5 times and 20-50 times those required for deoxidation only.
部门归属	chinese acad sci, inst met res, dept superalloys, imr cas, shenyang 110016, peoples r china. shenyang univ, dept mat, shenyang 110044, peoples r china.;niu, jp (reprint author), chinese acad sci, inst met res, dept superalloys, imr cas, shenyang 110016, peoples r china
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WOS记录号	WOS:000183139800004
引用统计	被引频次：18[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/321006/35973
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. P. Niu,X. F. Sun,T. Jin,et al. Investigation into deoxidation during vacuum induction melting refining of nickel base superalloy using CaO crucible[J]. Materials Science and Technology,2003,19(4):435-439.
APA	J. P. Niu,X. F. Sun,T. Jin,N. Yang,H. R. Guan,&Z. Q. Hu.(2003).Investigation into deoxidation during vacuum induction melting refining of nickel base superalloy using CaO crucible.Materials Science and Technology,19(4),435-439.
MLA	J. P. Niu,et al."Investigation into deoxidation during vacuum induction melting refining of nickel base superalloy using CaO crucible".Materials Science and Technology 19.4(2003):435-439.