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CN102776439A 一种铌微合金化Si-Mn-B系热成形钢板及其轧制工艺 无效 - 撤回

一种铌微合金化Si-Mn-B系热成形钢板及其轧制工艺
摘要：
一种铌微合金化Si-Mn-B系热成形钢板及其轧制工艺，属于冶金技术领域，涉及成形工艺技术，其特征在于板坯的（重量百分比）化学成分为：C 0.16%-0.35%，Si 0.6%-1.6%，Mn 1.5%-2.0%，P≤0.015%，S≤0.004%，Nb 0.01%-0.06%，B≤0.0040%，余量为Fe和不可避免的杂质。轧制工艺为：加热温度1190-1240℃，保温时间1-5小时，粗轧温度1140-1180℃，精轧温度890-940℃，终轧温度810-880℃，两段轧制总压下量≥75%。成品钢板厚度为5-30mm，其力学性能优良，抗拉强度达700-900MPa，屈服强度500-600MPa，延伸率18-25%，强塑积大于14000MPa·%。
摘要（英）：

A niobium microalloying Si-Mn-B series hot forming steel plate and a rolling technology thereof belong to the technical field of metallurgy, and relate to a forming technology. The niobium microalloying Si-Mn-B series hot forming steel plate is characterized that a slab comprises the following chemical compositions (by weight percent): 0.16%-0.35% of C, 0.6%-1.6% of Si, 1.5%-2.0% of Mn, no more than 0.015% of P, no more than 0.004% of S, 0.01%-0.06% of Nb, no more than 0.0040% of B and the balance of Fe and inevitable impurities. The rolling technology comprises the following steps that: the heating temperature is 1190-1240 DEG C, the heat insulating time is 1-15 hours, the rolling temperature is 1140-1180 DEG C, the precision rolling temperature is 890-940 DEG C, the finish rolling temperature is 810-880 DEG C, and the total rolling reduction for the two stages of rolling is not less than 75%. The thickness of finished steel plate is between 5-30 millimeters, and has a good mechanical property, tensile strength of 700-900MPa, shear strength of 500-600MPa, elongation coefficient of 18-25% and strong strength and ductility product which is greater than 140000MPa.%.

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