냉간압연에서 Edge-cracking 발생 예측에 관한 연구

Prediction of Edge-cracking Generation in Cold Rolling

  • 손영기 ;
  • 이상호 (부산대학교 정밀가공시스템공학과) ;
  • 이종빈 (POSCO 기술연구소 압연공정 연구그룹) ;
  • 이성진 (POSCO 기술연구소 압연공정 연구그룹) ;
  • 김병민 (부산대학교 기계공학부)
  • 발행 : 2009.04.24

초록

The rolling of flat slabs or sheet metal is probably the most advanced technique of metalworking technology. In spite of this very intensive activity, the problem if edge cracking has not been resolved. Although edge cracking is a major industrial problem, relatively little well-documented experimental work has been published on subject. Despite the paucity of exact experiments, it is reasonably certain from published data that three causes contribute to its occurrence; (1) limited ductility of the rolled material (2) uneven deformation at the edges and (3) variations in stresses along the width of the rolled material, particular near the edge. The present study was carried out to show the generation of edge cracking using ductile fracture criteria and FE-simulation. The validity of simulated results was verified by rolling experiments of steel strip.

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