Study on Friction Welding of Heat resisting Steel Materials and Its Real Time Evaluation by AE

J. Ocean Eng. Technol. 2001;15(2):79-87.

내열강재의 마찰용접과 AE에 의한 실시간 평가

김일석,공유식,황성필,김헌경,이연탁,오세규

부경대학교 대학원,부경대학교 기계공학부,부경대학교 대학원,부경대학교 대학원,부경대학교 대학원,부경대학교 기계공학부

Keywords: Heat resisting steels, Acoustic emission(AE), Friction welding(FRW), Optimum welding condition, Real time evaluation, Weld quality, Weld interface(W.I)

핵심용어: 내열강, 음향방출법, 마찰용접, 최적용접조건, 실시간평가, 용접품질, 용접계면

Abstract

In this paper, not only the development of optimizing of friction welding with more reliability and more applicability but also the development of in-process real-time weld quality (such as strength and toughness) evaluation technique by acoustic emission for friction welding of the engine exhaustive valve (SUH3-SUH35 dissimilar steels of 12.3mm, 16mm, 20mm, and 24mm in diameters) were performed, comparing with the other FRW matches of materials such as SUH3 to SUH31, STS303 and SUH3 to STS304. As an important result, the techniques for dissimilar friction welding optimization of engine heat resisting steels SUH3 and SUH35 (12.3mm, 16mm, 20mm, and 24mm) and its real-time weld quality evaluation by AE was developed, considering on both diameter and carbon equivalent effects.