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EXTRA LOW CARBON HOT ROLLED STEEL SHEET MANUFACTURING METHOD WITH LOW MECHANICAL PROPERTY DEVIATION IN THE THICKNESS DIRECTION
EXTRA LOW CARBON HOT ROLLED STEEL SHEET MANUFACTURING METHOD WITH LOW MECHANICAL PROPERTY DEVIATION IN THE THICKNESS DIRECTION
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机译:厚度方向上低机械性能偏差的超低碳热轧钢板制造方法
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摘要
PURPOSE: A method of manufacturing an extra-low carbon hot-rolled steel plate to decrease material difference in a depth direction is provided to remove solid element from steel by adding Ti and Nb and improve formability. CONSTITUTION: A method of manufacturing an extra-low carbon hot-rolled steel plate to decrease material difference in a depth direction comprises next steps. An extra-low carbon steel slab board is re-heated(S-10). The re-heated slab board is roughly hot-rolled(S-20). The roughly hot-rolled board is finishing-rolled using a multi-layered roll stand(S-30). The input temperature of the final roll stand is within 990~1010C. The finishing rolling temperature is within 850~950C. At the finishing rolling step, the cooling speed of the final roll stand is within 20~60C/stand.
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