| 摘要 |
PURPOSE:To prevent a material to be rolled from generating surface flaws and to improve its yield and productivity by heating the material for a brief period between rolling passes for the purpose of reforming oxidized scales on the material at the time of hot rolling a stainless steel containing a >= limited value of Cr. CONSTITUTION:In hot rolling a stainless steel containing >=11% Cr, a material to be rolled is heated for a brief period between rough rolling passes or between the passes of rough and finish rollings; oxidized scales are reformed, by said heating, on the metallic surface of material, a part exposed by peeling off the oxidized scales stuck to the surface of material during rolling, to perform thereafter the rolling of the next pass. In a hot rolling where a material to be rolled is broad one and its rolling reduction in the width direction is small; it is sufficient to heat the material in a range of about 200mm. from its edge, instead of heating it throughout its whole width. The material is heated for a brief period while blowing steam against it, at need. Further, a gas burner or an electromagnetic induction, etc. is used for heating. |
