일렉트로 가스 용접부의 기계적 성질에 미치는 Mn 및 입열량의 영향 (Effects of Mn and Heat-input on the Mechanical Properties of EGW Welds)

서지정보

· 발행기관 : 대한금속·재료학회
· 수록지 정보 : 대한금속·재료학회지 / 47권 / 3호 / 195 ~ 201페이지
· 저자명 : 김남인, 정상훈, 이정수, 강성원, 김명현

초록

This paper is concerned with effects of Mn and heat-input on the mechanical properties of EGW
welds. Four different kinds of welding consumables were fabricated by varying Mn contents such as 1.3, 1.5,
1.7, 2.0%Mn and each consumable was welded for EGW on four heat-input conditions between 190 and
340 KJ/Cm. Mn contents were decreased as heat-input increases and alloy elements (C, Si, Ti, B, Al) to
deoxidize easily also revealed similar tendency to Mn. Their microstructure, Charpy impact property and
strength were investigated, and it is found that Charpy impact property and strength exhibit a strong
dependence on change of microstructure by Mn contents and heat-input. The increase of Mn contents or the
decrease of heat-input made the microstructure fine and increase volume fraction of acicular ferrite, thereby
leading to the great improvement of Charpy impact property and strength. In case of single EGW, optimum
Mn contents are over 1.7% for the toughness and strength.

영어초록

This paper is concerned with effects of Mn and heat-input on the mechanical properties of EGW
welds. Four different kinds of welding consumables were fabricated by varying Mn contents such as 1.3, 1.5,
1.7, 2.0%Mn and each consumable was welded for EGW on four heat-input conditions between 190 and
340 KJ/Cm. Mn contents were decreased as heat-input increases and alloy elements (C, Si, Ti, B, Al) to
deoxidize easily also revealed similar tendency to Mn. Their microstructure, Charpy impact property and
strength were investigated, and it is found that Charpy impact property and strength exhibit a strong
dependence on change of microstructure by Mn contents and heat-input. The increase of Mn contents or the
decrease of heat-input made the microstructure fine and increase volume fraction of acicular ferrite, thereby
leading to the great improvement of Charpy impact property and strength. In case of single EGW, optimum
Mn contents are over 1.7% for the toughness and strength.

참고자료

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