INFLUENCE OF CERIUM ON THE CREEP-PROPERTIES OF THE AUSTENITIC STAINLESS-STEEL 253MA

被引：4
|
作者：
MAODE, Y
SANDSTROM, R
机构：
[1] Central Iron & Steel Research, Inst, China
来源：
HIGH TEMPERATURE TECHNOLOGY | 1988年 / 6卷 / 03期
关键词：
Cerium and Alloys - Iron and Steel Metallography--Inclusions - Steel Testing--High Temperature Properties - Steel--Composition Effects;
D O I：
10.1080/02619180.1988.11753393
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The creep rupture properties of the austenitic stainless steel 253MA of composition 21Cr-11Ni-Si-O. 17N with and without cerium additions have been studied. Cerium reduced the number of inclusions and their elongated shape or clustered form was modified to homogeneously distributed spherical particles. Sulfides at the grain boundaries were found only in the cerium-free steels. Creep cavitation at the sulfide sites occurred in the same way as that observed for low alloy steels. This is believed to be a mechanism for the improved creep ductility on adding cerium. The creep strength was simultaneously enhanced, supporting its close association with creep ductility.
引用
收藏
页码：153 / 157
页数：5
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