Strip edge cracking simulation in cold rolling

Journal Article · Mon Jan 17 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3552504· OSTI ID:21510183

Hubert, C; Dubar, L; Dubar, M; Dubois, A ^[1]

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1. Univ Lille Nord de France, F-59000 Lille (France)

This research work focuses on a specific defect which occurs during cold rolling of steel strips: edge-serration. Investigations on the industrial processes have led to the conclusion that this defect is the result of the edge-trimming and cold rolling sequences. The aim of this research work is to analyze the effect of the cutting process and the cold rolling on cracks occurrence, especially on strip edges.This study is performed using an experimental testing stand called Upsetting Rolling Test (URT). It allows to reproduce cold rolling contact parameters such as forward slip, reduction ratio and friction coefficients. Specimens sampled near trimmed industrial strip edges are deformed using the URT stand. Two sets of specimens with different stress states, obtained by annealing, are submitted to two reduction passes with extreme forward slips.Scanning electron microscopy observations added to 3D optical surface profiler topographies show that on one hand, forward slip has a major effect on cracks opening. On the other hand, cracks opening decreases according to high roll strip speed gradient. Concerning the heat-treated specimens, no crack appeared after all reduction passes, showing a large influence of the cutting process and consequently of the local stress state in the vicinity of the burnish and fracture regions.

• OSTI ID: 21510183
• Journal Information: AIP Conference Proceedings, Vol. 1315, Issue 1; Conference: AMPT2010: International conference on advances in materials and processing technologies, Paris (France), 24-27 Oct 2010; Other Information: DOI: 10.1063/1.3552504; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CRACKING
CRACKS
DEFECTS
FRACTURES
FRICTION
FRICTION FACTOR
OPENINGS
ROLLING
SCANNING ELECTRON MICROSCOPY
SIMULATION
SLIP
SLIP FLOW
STEELS
STRESSES
SURFACES
TESTING
TOPOGRAPHY
VELOCITY
ALLOYS
CARBON ADDITIONS
CHEMICAL REACTIONS
DECOMPOSITION
DIMENSIONLESS NUMBERS
ELECTRON MICROSCOPY
FABRICATION
FAILURES
FLUID FLOW
GAS FLOW
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS WORKING
MICROSCOPY
PYROLYSIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT ALLOYS