| 摘要 |
PURPOSE:To perform a heat treatment of a strip without the uneven temp. for heating and cooling and without the deformation of the strip arising there from by bringing the strip into contact with a heating or cooling roll which has a specific outside diameter, roll shell thickness, and surface roughness and in which a heat medium is passed. CONSTITUTION:The roll which has the roll outside diameter D, roll shell thick ness deltaR, and roll surface roughness omicron2 satisfying all the relations expressed by the equation is used in the case of making the heat treatment by heating or cooling the strip by bringing the strip into contact with the above-mentioned heating or cooling roll. More specifically, the four requirements; the plastic deformation of the strip, the thermal strain of the roll shell, the restriction on the strength of the roll shell and the restriction on the heat transmission are take into consideration in this invention. The heat treatment which obviates the generation of the uneven heating and cooling of the strip and the deforma tion of the strip arising therefrom is, therefore, made possible.
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