2(1/4)Cr-1Mo鋼とオーステナイト系ステンレス鋼の溶接継手の熱疲労特性について

URI http://repository.tsuyama-ct.ac.jp/metadata/631
FulltextURL
Title
2(1/4)Cr-1Mo鋼とオーステナイト系ステンレス鋼の溶接継手の熱疲労特性について
Title Alternative
The Thermal Fatigue Resistance of 2(1/4)Cr-1Mo Steel-to Austenitic Stainless Steel Weld Joints
Author
著者 山口 常昭
著者(別表記) Yamaguchi Tsuneaki
著者 渡辺 正紀
著者(別表記) Watanabe Masaki
著者 藤原 敏
著者(別表記) Fujiwara Satoshi
著者 中島 国凱
著者(別表記) Nakajima Kuniyoshi
著者 池本 喜和
著者(別表記) Ikemoto Yoshikazu
Abstract

An investigation has been undertaken to evaluate thermal fatigue resistance for the dissimilar welded joints under repeating thermal cycling. Four different materials were studied : 2(1/4)Cr-1Mo steel, austenitic stainless steel and these welded joints which were as welded and post heat treated of 700℃, 10 hr., F.C. The test conditions as follow : maximum temperature was varied 400℃ to 650℃, the minimum temperature was 10℃, cyclic rate was about 3c. p. m.. The following results were obtained. 1) In respect of welded joints, the thermal fatigue resistance were depended on the resistance of base metals at high temperature, that is the all welded joints were fractured within 2(1/4)Cr-1Mo steel. 2) Decarburization zone was seen in 2(1/4)Cr-1Mo site of weld bond for as welded joints which were heated than 500℃. The same decarburization occurred in the post heat treated joints, but these zone did not extend during thermal fatigue test. Therefor, this explained that the different of thermal fatigue resistance between as welded joints and post heat treated joints become smaller. 3) Thermal fatigue cracks tended to initiate and propagate preferentially in and through the decarburization zone 4) The resistance of thermal fatigue for dissimillar welded joints are strongly depended on the characteri-stics of decarburization zone.

Subject
560 Metal and mining engineering
Publish Date
1972-03-30
Publication Title
津山工業高等専門学校紀要
Publication Title Alternative
Bulletin of Tsuyama National College of Technology
Volume
3
Issue
2
Start Page
173
End Page
185
ISSN
0287-7066
NCID
AN00149351
Publisher
津山工業高等専門学校
Official URL
Contents Type
Departmental Bulletin Paper
language
Japanese
File Version
publisher