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CN108728752B 一种低密度冷轧中锰钢板及其制备方法 有权

一种低密度冷轧中锰钢板及其制备方法
摘要：
一种低密度冷轧中锰钢板及其制备方法，属于先进高强钢技术领域；中锰钢的成分按重量百分比为：C：0.20～0.25％，Mn：10.0～11.0％，A1：6.03～7.0％，Ni：3.0～7.72％，余量为Fe及杂质；方法：1)按照成分配比冶炼出钢锭；2)加热锻造；3)钢坯进行多道次热轧；4)热轧板进行快速淬火，后进行回火处理；5)对回火后的实验钢进行酸洗；6)冷轧；7)冷轧板进行临界退火处理，得到低密度冷轧中锰钢板；本发明通过改变钢板的化学成分，添加适当比例的Ni元素，并利用冷轧+临界退火的热处理工艺，在不降低钢板伸长率的条件下，显著提高其强度。
摘要（英）：

The other is a low-density cold-rolled medium manganese steel plate and a preparing method thereof, and belongs to the technical field of advanced high strength steel. The composition of the medium manganese steel comprises the followings by weight percentage, 0.20-0.25% of C, 10.0-11.0% of Mn, 6.03-7.0% of Al, 3.0-7.72% of Ni, and the balance Fe and the impurities. The method comprises that (1) an ingot is smelted according to the composition ratio; (2) heating forging is conducted; (3) multi-channel hot rolling is conducted on a steel billet; (4) a hot-rolled plate is rapidly quenched and then tempered; (5) the tempered experimental steel is pickled; (6) cold rolling is conducted; and (7) critical annealing treatment is conducted on the cold-rolled plate to obtain the low-density cold-rolled medium manganese steel plate. According to the low-density cold-rolled medium manganese steel plate and the preparing method thereof, by changing the chemical composition of the steel plate, theNi element of the appropriate proportion is added, the heat treatment process of cold rolling + critical annealing is used, and the strength of the steel plate is remarkably improved without reducingthe elongation rate of the steel plate.

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