Study on local embrittlement of welding heat-affected zone in X80 pipeline steels
Study on local embrittlement of welding heat-affected zone in X80 pipeline steels
- Neue Suche nach: Shiying, Hao
- Neue Suche nach: Gao, Huilin
- Neue Suche nach: Zhang, Xiaoyong
- Neue Suche nach: Yong, Zhou
- Neue Suche nach: Shiying, Hao
- Neue Suche nach: Gao, Huilin
- Neue Suche nach: Zhang, Xiaoyong
- Neue Suche nach: Yong, Zhou
The relationship between the microstructure and toughness of welding heat-affected zone in Z80 grade pipeline steels is studied. It is found that the intercritical reheated coarse-grained heat-affected zone (ICCGHAZ) of experimental steels has the lowest toughness values when the secondary peak temperature is at intercritical (α +γ) region during multi-pass welding. The local embrittlement is mainly attributed to the morphology, amount and size of M-A constituent. It is also found that the microstructural inhabitance at ICCGHAZ has a deleterious effect on the toughness. On the basis of above experimental results, it is suggested that the local embrittlement should be prevented by using pre-heating thermal cycle which could eliminate the microstructural inhabitance and using post-heating thermal cycle which could improve the morphology, amount and size of M-A constituent.
Dokumentinformationen
Study on local embrittlement of welding heat-affected zone in X80 pipeline steels
China Welding ; 20 , 2 ; 36-40
2011
5 Seiten, 8 Bilder, 2 Tabellen, 5 Quellen
Aufsatz (Zeitschrift)
Englisch
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