Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)
- 2003.05a
- /
- Pages.40-42
- /
- 2003
A Study on Relationship between Hot Ductility Behavior and Hot Cracking Susceptibility in PTA Weld of Ni-based Superalloy
니켈기 초내열합금 PTA용접부의 고온균열감수성과 고온연성거동에 관한 연구
- Lee, Chung-Rae ;
- Kim, Sung-Wook ;
- Choi, Woo-Hyuk ;
- Eom, Sang-Ho ;
- Lee, Chang-Hee ;
- Kim, Jae-Chul ;
- Choi, Chul
- 이청래 (한양대학교 대학원 재료공학과) ;
- 김성욱 (한양대학교 대학원 재료공학과) ;
- 최우혁 (한양대학교 대학원 재료공학과) ;
- 엄상호 (한양대학교 대학원 재료공학과) ;
- 이창희 (한양대학교 재료공학과) ;
- 김재철 (한전전력연구원 발전연구소) ;
- 최철 (한전전력연구원 발전연구소)
- Published : 2003.05.01
Abstract
In general, nickel-base superalloy has been extensively used as land-based gas turbine blades and vanes. Plasma transferred arc welding(PTAW) has been considered as a repair welding process of nickel-base superalloy. This research evaluated the relationship between hot ductility behavior and hot cracking susceptibility in nickel-base superalloys. Ductility recovery rate of nickel base superalloys was found to be poor due to incipient melting and constitutional liquation. This seems to increase the hot cracking susceptibility.
Keywords