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The shape of strip which is visually flat can, after cutting or slitting, distort to unacceptable levels. This distortion is widely accepted as being due to the presence or imbalance of residual stresses. The objective of this project was to assess the levels of residual stress and to examine the relationships with curvature after slitting or cutting. A Stresscan 500C system was selected as the means for measuring residual stress. In the canning industry, light gauge tinplate sheet is slit and cut into blanks for forming cans and this market offered a ready source of material for investigation. Highly significant relationships have been established between stress levels and variations in stress levels, particularly for the difference between the top and bottom surfaces in the rolling direction, and the amount of bow on the products. This applied mainly to material processed through the double reduced route and it is not known why there should be this difference to single reduced routed material. There was also a general trend between strip shape and stress data but no relationship was noted with strip camber.

Additional information

Authors: THOMAS J T, British Steel plc, London (GB)
Bibliographic Reference: EUR 17999 EN (1998) 61pp., ECU 16.50
Availability: Available from the (2)
ISBN: ISBN 92-828-3347-X
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