Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)
- 2006.10a
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- Pages.123-124
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- 2006
Characteristics of 18Cr ferritic stainless steel welds
18Cr 페라이트계 스테인리스강의 용접특성
- Published : 2006.10.19
Abstract
This study aimed at exploiting low heat input characteristic of laser welding to effectively control grain coarsening in the fusion zone(FZ) and heat affected zone(HAZ) of 1.5mm thick 18wt% Cr ferritic stainless steel weld. The study demonstrated that as compared with gas tungsten arc welding(GTAW), laser welding brought about significant grain refinement in the FZ and HAZ. However, the impact absorbed energy of GTA weld was superior than that of laser weld because the strengthening effect during welding and cooling stage was higher In laser weld than that in GTA weld. The coarser grains in each weld than base metal resulted in an inferior toughness.
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