Role of delta-ferrite in the dissolution of passive films on the austenitic stainless-steel weld metals

被引:26
|
作者
Pujar, MG [1 ]
Dayal, RK
Gill, TPS
Malhotra, SN
机构
[1] Indira Gandhi Ctr Atom Res, Div Met, Kalpakkam 603102, Tamil Nadu, India
[2] Indira Gandhi Ctr Atom Res, Mat Dev Div, Kalpakkam 603102, Tamil Nadu, India
[3] Indian Inst Technol, Met Engn & Mat Soc, Bombay 400076, Maharashtra, India
关键词
D O I
10.1023/A:1006657604758
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Austenitic stainless-steel weld metals should contain about 2-10% delta-ferrite in order to avoid the problem of hot-cracking during weld solidification. The role of delta-ferrite is equivalent to that of chromium in altering electrochemical parameters, but the exact role of delta-ferrite in affecting the passivity of the weld metal is not known. The role of delta-ferrite on the dissolution characteristics of the passive films formed on the austenitic stainless-steel weld metals is investigated. Results showed that every specimen, by virtue of its different ferrite content, developed a passive film having a different chemical composition and the potential arrests are found to be different even in a single group of weld-metal specimens.
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页码:823 / 826
页数:4
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