Friction Welding of Dissimilar Hot Die Punch Materials and Its Creep Prediction and Quality Evaluation by AE(I) - FRW and AE+

J. Ocean Eng. Technol. 1999;13(3):77-82.

Park, Il-Dong;Oh, Sae-Kyoo;Kim, Ji-Su;

열간 금형펀치 제작을 위한 이종재 마찰용접과 고온크리프 실시간 예측 및 AE에 의한 품질평가(Ⅰ) -마찰용접과 AE

박일동;오세규;김지수;

부산기능대학 금형학과;부경대학교 공과대학 기계공학부;부경대학교 대학원 기계공학과;

Keywords: Acoustic Emission, Friction Welding, Tensile Strength, Welding Condition, Heating Time, Joint Efficiency, Toughness

핵심용어: AE, 응향방출, FRW, 마찰용접, 인장강도, 용접조건, 가열시간

Abstract

The compleete joining method for dissimilar hot die punch materials and its real-time evaluation method are not available at present. Brazing method has been used for joining them, but it is known that the welded joint by the brazing has the lower bonding efficiency and reliability than the diffusion welding. The friction wleding with a diffusion mechanism in bonding was applied in this study. So, this work was carried out to determine the optimal friction welding conditions and to analyze mechanical properties of friction welded joints of hot die punch materials (STD61 for the blade part of hot die punch) to alloy steel (SCM440 for the shank park of hot die punch) such as plunger. In addition, acoustic emission test was carried out during friction welding to evaluate the weld quality.