Low-cost deep drawing steel plate and production process thereof

• Main Authors: SUN JINGLEI, LI XIAOFANG, LIANG SHIHAO, LI HONGBO, GAO XIAOBO, LI JUNYAN, CAO WEIQIANG, LUO QIANG
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2023
• 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; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the technical field of steel and iron smelting, and provides a low-cost deep drawing steel plate and a production process thereof.The low-cost deep drawing steel plate is prepared from, by mass, 0.02%-0.07% of C, smaller than or equal to 0.03% of Si, 0.08%-0.20% of Mn, smaller than or equal to 0.025% of P, smaller than or equal to 0.020% of S, 0.015%-0.055% of Als and the balance Fe and inevitable impurities, and the production process comprises the following steps that S1, converter smelting is conducted, specifically, raw materials are added into a converter for blowing; s2, LF refining; s3, performing continuous casting to obtain a plate blank; s4, hot rolling; s5, cold rolling and acid pickling; s6, annealing: raising the temperature to 480-500 DEG C at the speed of 70-90 DEG C/h, and keeping the temperature for 5-6 hours; heating to 680-700 DEG C at the speed of 70-110 DEG C/h, and preserving heat for 8-10 hours; performing air cooling to 200-250 DEG C, then performing water cool