一、前言许多冶金工作者对低碳铝镇静钢的合金成份、生产工艺曾作过系统地研究。六十年代初美国 R.L.怀特等人指出,平均塑性应变比(r)一般随着终轧温度下降而降低;但随卷取温度的上升而降低。七十年代初,胡郇在实验室条件下,对低碳铝镇静钢的合金成份作了进一步研究,结果表明,当铝镇静钢的 Mn 含量为0.05%时,r 出现最大值。图1为低碳铝镇静钢成品板达不到的γB2156(4标准 ZF 级的原因排列图)。从图1清楚地看出达不到 ZF 级的主要原因是延伸 First, the foreword Many metallurgical workers on the low carbon aluminum killed steel alloy composition, production process has been systematically studied. In the early 1960s, R. White, et al., Pointed out that the average plastic strain ratio (r) generally decreases with the decrease of the finishing temperature, but decreases with the rise of the coiling temperature. In the early seventies, Hu Kui under laboratory conditions, the low carbon aluminum killed steel alloy components were further studied, the results show that when the aluminum killed steel Mn content of 0.05%, r appears maximum. Figure 1 shows the low-carbon aluminum killed steel plate not reached γB2156 (4 standard ZF-level reasons arrangement). It is clear from Figure 1 that the main reason for not reaching the ZF level is the extension