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Study of edge-cracking characteristics during thin-foil rolling of Cu-Fe-P strip

Authors
  • Lee, Sang-Ho1
  • Lee, Kyung-Hun2
  • Lee, Seon-Bong3
  • Kim, Byung-Min4
  • 1 Hyundai Steel Company, Technical Research Center of HR Technology Development Team, 167-32, Kodae-Ri, Songak-Eup, Dangjin-Gun, Chungnam, 343-711, South Korea , Chungnam (South Korea)
  • 2 Pusan National University, PNU-IFAM Joint Research Center, San 30, Jangjeon-dong, Geumjeong-gu, Pusan, 609-735, South Korea , Pusan (South Korea)
  • 3 Keimyung University, Faculty of Mechanical and Automotive Engineering, 1000, Sindang-dong, Dalseo-gu, Daegu, 704-701, South Korea , Daegu (South Korea)
  • 4 Pusan National University, School of Mechanical Engineering, San 30, Jangjeon-dong, Geumjeong-gu, Pusan, 609-735, South Korea , Pusan (South Korea)
Type
Published Article
Journal
International Journal of Precision Engineering and Manufacturing
Publisher
Springer Berlin Heidelberg
Publication Date
Dec 04, 2013
Volume
14
Issue
12
Pages
2109–2118
Identifiers
DOI: 10.1007/s12541-013-0286-5
Source
Springer Nature
Keywords
License
Yellow

Abstract

A three-dimensional (3D) strip profile model is proposed to improve the accuracy of predicting the profile of the as-rolled thin-foil strip. The contact and rolling pressure distributions at a 6-high mill are calculated numerically using the geometric structure and boundary conditions in the width direction. The rolling pressure distribution in the rolling direction is determined by Fleck’s model, and the as-rolled 3D strip profile is predicted using the pressures in the width and rolling directions. The rolling force in the width direction causes elastic deformation of the rolls, which induces uneven deformation at the strip edges. Strip failure frequently occurs in the cold rolling process because of increasing edge-cracking. The onset of edge-cracking is introduced using the ductile fracture criterion in continuous thin-foil rolling. The states of stresses in the deformation zone are calculated using the finite element (FE) method. Thin-foil rolling experiments are carried out, and the results are compared with those of the proposed 3D model and FE simulations to verify the precision of the 3D strip profile model.

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