The method of the austenitic stainless hot-rolled steel sheet by hot direct rolling

摘要

PURPOSE: A method for producing a hot rolling steel plate is provided to make the direct-transferring hot rolling possible by removing the defect of rough surface through a certain process and heating a slab by a low fuel unit. CONSTITUTION: A surface of a slab is contacted with cooling water right after continuous-molding so that the surface temperature of the slab is kept in a range of 500 to 300°C. The slab is re-heated in an atmosphere that excessive oxygen concentration is 3 to 5%, and the re-heated slab is hot-rolled such. Thus, an austenite stainless hot rolling steel plate is produced. Herein, a device for contacting the cooling water deposits the steel slab in the cooling water at least for 1 to 2 minutes or sprays the cooling water for thirty minutes. Further, the re-heating is preheated at 1080 to 1170°C and is regularly heated at 1210 to 1290°C.