| 摘要 |
<p>PURPOSE:To obtain a cold rolled metallic plate free from malformation from a hot rolled metallic plate which does not contain a rimmed layer, by enlarging the diameter of a work roll at the corresponding position by a prescribed quantity, and increasing the rolling pressure at the part near the plate ends, where the hardness is increased. CONSTITUTION:The diameters of a work roll 2 at its both ends, which are the positions corresponding to the hardness increased parts of a metallic plate having the parts of increased hardness near its both ends, are made larger by 1-100mum than the diameters of the work roll 2 at the position corresponding to the starting point of hardness increasing, near the roll center. Then the metallic plate having the hardness increased parts is cold rolled. Thus the elongation at the plate ends is made larger than that of other part, and quater buckling is reduced, accordingly a cold rolled metallic plate excellent in shape and free from malformation is obtained from a hot rolled metallic plate which does not contain a rimmed layer.</p> |
