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CN101597674A 一种低屈服高抗拉强度DC01汽车用钢板的连续退火方法 有权

一种低屈服高抗拉强度DC01汽车用钢板的连续退火方法
摘要：
一种低屈服高抗拉强度DC01汽车用钢板的连续退火方法，属于金属材料加工领域。钢板的化学成分质量百分比为：C，0.02－0.04％；Mn，0.2－0.35％；Si，≤0.03％；P，≤0.010％；S，≤0.010％；Als，0.02－0.06％，N，0.0020～0.0050，余量为Fe；热轧工艺参数：加热温度，1250±30℃；终轧温度，930±20℃；卷取温度，730±20℃；冷轧压下率：控制在75－85％；均热时间：50～100s；退火温度：780±20℃；缓冷段出口温度：675±20℃；快冷段出口温度：400±20℃；过时效温度：350±20℃；平整延伸率：0.9±0.3％。优点在于，所生产的钢板具有屈服强度低、抗拉强度高、成形性能好、产品质量高，带来可观的经济效益。
摘要（英）：

The invention relates to a continuous annealing method of DC01 steel plate with low yield and high tensile strength for automobiles, belonging to the field of metallic materials processing. The chemical composition of the steel plate is as follows by mass percentage: 0.02-0.04% of C, 0.2-0.35% of Mn, less than or equal to 0.03% of Si, less than or equal to 0.010% of P, less than or equal to 0.010% of S, 0.02-0.06% of Als, 0.0020-0.0050%of N, and the rest being Fe. The hot rolling parameter is as follows: heating temperature at 1250+/-30 DEG C; finishing temperature at 930+/-20 DEG C; coiling temperature at 730+/-20 DEG C; cold rolling reduction ratio being controlled at 75-85%; soaking time for 50-100s; annealing temperature at 780+/-20 DEG C; outlet temperature of the slow-cooling section at 675+/-20 DEG C; outlet temperature of the rapid-cooling section at 400+/-20 DEG C; overaging temperature at 350+/-20 DEG C; and level elongate ratio being 0.9+/-0.3%. The generated steel plate has the advantages of low yield strength, high tensile strength, fine formability, high product quality and considerable economic benefit.

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