어코스틱에미션 신호를 활용한 고장력강 용접성 평가에 관한 연구

• 영문명: A Study on the Evaluation of Weldability for High Tensile Stregnth Steel Using Acoustic Emission Signals
• 발행기관: 한국산업기술융합학회(구. 산업기술교육훈련학회)
• 저자명: 고광식(Kwang-Sig Kho)
• 간행물 정보: 『산업기술연구논문지』산업기술연구논문지 제23권 4호, 101~107쪽, 전체 7쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2018.12.30

영문 초록

The purpose of this thesis is to investigate the welding characteristics and residual stress behavior of 60 high tensile strength steels, commonly used in steel structures for power transmission automobiles, and ship. The experimental material were welded by gas metal arc welding process in order to evaluate the characteristics according to the notch position, and compare these with other materials. The residual stress distribution was also measured under nonrestraint welding conditions. According to these test, we reached the following conclusions : The residual stress in welded specimens was much higher in the restraint nonrestraint condition. In case of restraint welding, the the residual stress in the σx-direction was measured as the tensile residual stress. In case of nonrestraint welding, this was rapidly changed to compressive residual stress at 15～18mm from the welding bead center. In the case of nonrestraint welding, the residual stress in the σy-direction was measured as the tensile residual stress. In the case of restraint welding, this changed to compressive residual stress at 55～70mm from the welding bead center.

목차

Ⅰ. 서 론

Ⅱ. 실 험

Ⅲ. 실험결과 및 고찰

Ⅳ. 결 론

키워드

High Tensile Strength Steel(고장력강) Welding Conditions(용접조건) Welded Specimens(용접 시험편) Welding Residual Stress(용접잔류응력) Nonrestraint(비구속)