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냉간 박판압연공정에서 공정변수가 엣지 크랙 성장에 미치는 영향
CUIXIANGZI(X. Z. Cui),이상호(S. H. Lee),이성진(S. J. Lee),이종빈(J. B. Lee),김병민(B. M. Kim) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
Edge cracks in cold rolling always influence to the quality of productions, while the “V” shaped cracks were propagated by passing the roll gap. We set up the sizes and shapes of initial cracks in simulation according to the references form real productions. Different to in hot rolling, the cracks in cold rolling couldn’t be reduced from propagation automatically after generate, even if these could be reduced by changing the process parameters. In this paper, we described the affections of process parameters on the propagation of edge cracks, such as reduction ration and tension. We predicted that the dependence of the cracks propagations of changing of process conditions and expected to gain the smaller edge cracks. By raising the reduction ratio, the cracks were propagated increasingly in both transverse and rolling directions. And as tension raise, the cracks became propagated in both directions in which transverse direction was less effectively.