MANUFACTURE OF AUSTENITIC STAINLESS STEEL

• Main Authors: OGURA SHIGERU, YOSHIOKA KEIICHI
• Format: Patent
• Language: English
• Published: 17.07.1986
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

PURPOSE:To manufacture an austenitic stainless steel with little spills by restricting the concn. of Si in a steel and subjecting a slab of the steel to shot blasting at a proper projection density before it is put in a heating furnace. CONSTITUTION:When an austenitic stainless steel is manufactured, the concn. of Si in a steel is regulated to 0.40-0.50% to improve the strippability of scale, and a slab of the steel is subjected to shot blasting at 350-500kg/m projection density before it is put in a heating furnace prior to hot rolling. By shot blasting, the surface of the slab is smoothened, stress is left in the surface layer, and the structure is made fine to increase the strength. Thus, the occurrence of spills is prevented during hot rolling and cold rolling, and the yield of steel strips is improved.