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A method for producing an austenitic iron / carbon / manganese austenitic steel sheet with improved strength, excellent toughness, and suitable for forming at low temperatures, and a steel sheet thus produced
A method for producing an austenitic iron / carbon / manganese austenitic steel sheet with improved strength, excellent toughness, and suitable for forming at low temperatures, and a steel sheet thus produced
A hot-rolled sheet of iron-carbon-manganese austenitic steel has the following composition (by wt %): 0.5 = C = 0.7; 17 = Mn = 24; Si = 3; Al = 0.050; S = 0.030; P = 0.080; N = 0.1; optionally one or more elements such as Cr = 1, Mo = 0.40, Ni = 1, Cu = 5, Ti = 0.50, Nb = 0.50 and V = 0.50; and iron and inevitable production impurities the remainder. The recrystallized fraction of the steel is greater than 75%, the surface fraction of precipitated carbides is less than 1.5%, and the medium grain size of the steel is less than 18 microns. Independent claims are given for: (a) fabrication of the hot-rolled steel sheet; (b) a cold-rolled steel sheet having the same composition as the hot-rolled sheet; and (c) fabrication of the cold-rolled sheet.
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机译:铁-碳-锰奥氏体钢的热轧板具有以下组成(以重量%计):0.5 = C = 0.7; 17 = Mn = 24; Si = 3; Al = 0.050; S = 0.030; P = 0.080; N = 0.1;任选地一种或多种元素,例如Cr = 1,Mo = 0.40,Ni = 1,Cu = 5,Ti = 0.50,Nb = 0.50和V = 0.50;铁和不可避免的生产杂质。钢的重结晶分数大于75%,沉淀碳化物的表面分数小于1.5%,钢的中等晶粒尺寸小于18微米。具有以下独立权利要求:(a)热轧钢板的制造; (b)具有与热轧板相同组成的冷轧钢板; (c)冷轧板的制造。
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