Stainless steel material and preparation method thereof

• Main Authors: CUI XIAOLONG, BAO XIANYONG, ZHANG FENG, WENG JIANYIN, LIANG MENGYUAN, JIN LEI
• Format: Patent
• Language: Chinese; English
• Published: 18.09.2018
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; 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; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a stainless steel material and a preparation method thereof. The stainless steel material comprises the following components of, by mass percentage, 16-25% of Cr, 12-17% of Mn, less than 0.25% of C, less than 1% of Si, 0.3-0.9% of N, and the balance Fe and unavoidable impurities; the stainless steel material is nickel-free, multilayer and biphase stainless steel; the surface layer of the stainless steel is an austenite structure; and the core of the stainless steel is an austenite-ferrite biphase structure. The provided stainless steel material can be subjected to 24 hsalt mist and 24 h artificial sweat instead of being corroded, does not contain nickel and molybdenum, does not have the nickel allergy risk, is lower in raw material cost, and has the obvious advantages in aspects such as the magnetic property, simplification of a machining technology, and less material removal in the part machining process. 本发明涉及种不锈钢材料及其制备方法。种不锈钢材料，以质量％计，含有：Cr：16-25％，Mn：12-17％，C小于0.25％，Si小于1％，N：0.3-0.9