• Journal of Advanced Marine Engineering and Technology
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• v.7 no.1
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• pp.23-33
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• 1983

경제성과 압접성능의 우수성 때문에 일반 산업기계, 방위산업기계 및 우주항공기계등의 부품생산에 응용되고 있는 마찰 용접에 있어서, 현재 주 관심사 중의 하나는 용접강도에 대한 신뢰성 높은 공정중 비파괴 검출이며 이들의 실용화를 위한 정량적 해석이다. 그러나 이러한 연구는 아직 개발 완성되지 못하고 있다. 본 연구에서는, AE법에 의한 용접강도의 공정중 비파괴적 QC시스템 개발을 최종 목적으로 한 설계자료를 얻기 위하여, 이종강의 봉과 봉, 관과 관의 마찰용접강도와 AE 총누적량에 용접조건이 미치는 영향이 실험적으로 조사되었고, 회전 속도를 매개 변수로 하여 용접강도와 AE 총누적량과의 정량관계가 수립되었다.

• Journal of Ocean Engineering and Technology
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• v.13 no.4 s.35
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• pp.105-111
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• 1999

This study aimed not only to develop the optimization of dissimilar friction welding of pinion gear of a motor vehicle steels of SCM415 and SMn443, but also to develop the application technique of the acoustic emission to accomplish an in-process real-time quality(such as strength and toughness) evaluation during friction welding of the pinion gear by the AE technique.

• Journal of Power System Engineering
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• v.4 no.4
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• pp.54-58
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• 2000

The complete 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 welding 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 part of hot die punch) such as plunger. In addition, acoustic emission test was carried out during friction welding to evaluate the weld quality.

• Journal of Ocean Engineering and Technology
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• v.13 no.3 s.33
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• pp.77-82
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• 1999

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.