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最近,川崎钢铁公司开发了具有极好成型性的超低碳热轧薄钢板。主要是控制这种钢的化学成份,即是说,含S量≤0.003％(重量百分数)和加钛,以便有效的Ti/C(原子比)>1.0。在热轧过程中,这种钢在低于600℃下卷取。这种钢的特性如下: ①总延伸率≥55％(板厚3.2毫米); ②虽然加钛,平面各向异性极小; ③由于控制残留的含碳量和细晶粒尺寸,这种钢显示较高的抗冷加工脆性。
Recently, Kawasaki Steel has developed an ultra-low carbon hot-rolled steel sheet with excellent formability. Mainly to control the chemical composition of the steel, that is, containing less than 0.003% by weight of S and adding titanium so that effective Ti / C (atomic ratio)> 1.0. During hot rolling, this steel is coiled at below 600 ° C. The characteristics of this steel are as follows: ① Total elongation ≥55% (thickness 3.2 mm); ② Even though titanium is added, the plane anisotropy is extremely small; ③ Due to the control of residual carbon content and fine grain size, High resistance to cold working brittleness.