Austenite stainless steel plate with product of strength and elongation larger than 50 Gpa.% and manufacturing method

• Main Authors: FANG JIANFENG, LIANG JINMING, SONG RENBO, WANG TIANYI, XU XIANGDONG, QUAN SHUYI, WANG YONGJIN, SU YANG
• Format: Patent
• Language: Chinese; English
• Published: 20.11.2020
• 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 discloses a manufacturing method of a low-cost, high-strength and high-toughness chromium-manganese-series Austenite stainless steel plate with the product of strength and elongation larger than 50 Gpa.%, and belongs to the technical field of metal machining. The Austenite stainless steel plate is prepared from 0.12% of C, 1.0% of Si, 6.0%-10.0% of Mn, 1.5%-3.0% of Ni, 16.0%-18.0% ofCr, 0.06% of P, 0.03% of S, 1.2%-2.0% of Cu, not larger than 0.30% of N and the balance Fe. The manufacturing method comprises the steps of raw material preparation, smelting, casting, forging, hot rolling, acid pickling, cold rolling and solution treatment. The tensile strength of the high-strength and high-toughness 200-series Austenite stainless steel plate ranges from 1000 Mpa to 1100 Mpa, the specific elongation is 46%+/-2%, and the product of strength and elongation can reach 50 Gpa.%. By means of the reasonable composition proportion and heat treatment process, the low-cost, high-strength and high-toughness ch