지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2014.6
- 수록면
- 95 - 101 (7page)
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초록· 키워드
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Joining of grey cast iron by fusion welding has much difficulties for its extremely low ductility and low toughness because of the flake form of the graphite. And the brittle microstructure, i.e. ledeburite may be formed during fusion welding by its rapid cooling rates. By these kinds of welding problem, preheat and post heat treatment temperature must be increased to avoid weld crack or welding problems.
In order to avoid these fusion welding problem, friction welding of cast iron was carried out for improving joint soundness, establishing friction welding variables.
There is no factor for evaluating friction weldability in continuous drive type friction welding.
In this point of view,this study proposed the parameters for calculating friction weld heat input.
The results obtained are as follows ;
1. There was a close relationship between tensile strength and flash appearance of friction welded joint.
2. Tensile strength was decreased and flash was severely oxidized as increasing frictional heating time.
3. As increased forging pressure P₂, flash had a large crack and tensile strength was decreased.
4. As powdered graphite by rotational frictional force induced flat surface and hindered plastic flow of metal ,tensile strength of welded joint was decreased.
5. Heat input for continuous drive type friction welding could be calculated by the factors of P₁, P₂ and upset distance(δ).
In order to avoid these fusion welding problem, friction welding of cast iron was carried out for improving joint soundness, establishing friction welding variables.
There is no factor for evaluating friction weldability in continuous drive type friction welding.
In this point of view,this study proposed the parameters for calculating friction weld heat input.
The results obtained are as follows ;
1. There was a close relationship between tensile strength and flash appearance of friction welded joint.
2. Tensile strength was decreased and flash was severely oxidized as increasing frictional heating time.
3. As increased forging pressure P₂, flash had a large crack and tensile strength was decreased.
4. As powdered graphite by rotational frictional force induced flat surface and hindered plastic flow of metal ,tensile strength of welded joint was decreased.
5. Heat input for continuous drive type friction welding could be calculated by the factors of P₁, P₂ and upset distance(δ).
목차
Abstract
1. 서론
2. 실험방법
3. 실험 결과 및 고찰
결론
Reference
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UCI(KEPA) : I410-ECN-0101-2015-580-001653103