Economical duplex stainless steel plate, method for improving strength of economical duplex stainless steel plate and application of economical duplex stainless steel plate

• Main Authors: PEI MINGDE, LIANG XIANGXIANG, LI GUOPING, QIN YUHANG
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2022
• 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 belongs to the field of special stainless steel variety development and application, and particularly relates to an economical duplex stainless steel plate, a method for improving the strength of the economical duplex stainless steel plate and application of the economical duplex stainless steel plate. The method for improving the strength of the economical duplex stainless steel plate comprises the following steps: (1) carrying out first solution treatment on a duplex stainless steel hot-rolled coiled plate, and carrying out water cooling after discharging; (2) after cold rolling to a target thickness, carrying out second solution treatment; (3) the duplex stainless steel is strengthened through cold machining; and (4) the economical duplex stainless steel plate product is obtained through flattening and withdrawal and straightening. According to the method, further high strengthening of the economical duplex stainless steel cold plate is achieved, meanwhile, the strength and the ductility of a