冷轧压下率对DQ级深冲带钢组织和性能的影响

Influence of Cold Reduction on Structure and Properties of DQ Level Deep-Drawing Strip Steel

研究了60%～80%冷轧压下率对3.5 mm CSP热轧板轧制的1.4～0.7 mm冷轧深冲带钢力学性能、组织和织构的影响。结果表明,随冷轧压下率由60%提高至80%,冷轧带钢的再结晶开始温度由560℃降至520℃,成品带钢组织细化;当冷轧压下率为74.3%时,成品DQ级带钢的深冲性能最佳。随冷轧压下率提高,成品深冲带钢△r值逐渐减小,这与成品带钢中{112}〈110〉织构取向函数值f(g)升高有关。

Effect of 60% - 80% cold reduction on structure, texture and mechanical properties of 1.4 - 0. 7 mm cold rolled deep-drawing strip steel firom 3.5 mm CSP （ Compact Strip Production） hot rolled plate has been studied. Results show that with increasing cold reduction to 80% from 60% , the beginning reclystallization temperature of cold rolled strip steel decreases to 520 ℃ from 560 ℃ and the structure of strip steel products fines, and with 74. 3% cold reduction the DQ lever deep-drawing performance is optimum. With increasing cold reduction the △r value of deep-drawing strip steel products gradually decreases, that is relating to enhancement of orientation function f（g） value of {112} 〈 110 〉 texture in strip steel products.