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유한요소 해석을 이용한 합금화 용융아연도금강판의 도금층 파우더링에 관한 연구
김동욱(D.W. Kim),장윤찬(Y.C. Jang),이영석(Y. S. Lee),김성일(S.I. Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Demand for hot-dip galvannealed steel has been increased due to it high corrosion resistance, paintability, and formability in automotive industry. Coating of Hot-dip galvannealed steel consists of various Fe-Zn intermetallic compounds. Since the coating is hard and therefore it is very brittle, the surface of steel sheet is easy to be ruptured during second manufacturing processing. This is called as powdering. Hence, various research have been carried out to prohibit powdering for improving the quality of GA steel during second manufacturing processing. This paper performed finite element analysis to evaluate local powdering and compared FEA results with V-bending test. The effects of punch radius and coating strength on the powdering was examined.