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发明公开
CN108486504A 一种C-Mn钢及其生产工艺 无效 - 驳回

一种C-Mn钢及其生产工艺
摘要：
本发明提供了一种生产具有抗氢致裂纹性能的高品质C-Mn钢及其生产工艺，其生产工艺为：(1)使用连铸板坯生产该类钢种，板坯厚度为150mm～300mm，板坯宽度为1000mm～3000mm；(2)轧制后钢板规格为，钢板厚度5mm～40mm，钢板宽度2000mm～3500mm；(3)将板坯轧制为最终规格的钢板后，对钢板进行快速冷却，冷却开始钢板的表面温度在750℃～820℃之间，冷却结束时钢板的表面温度在550℃～650℃之间，冷却速率在20℃/s～40℃/s之间。本发明在钢板相变过程中通过快速的冷却抑制碳元素的扩散，降低钢板心部的偏析程度，提高钢板的均匀性，通过该方式生产的C-Mn钢具有良好的抗氢致裂纹性能。
摘要（英）：

The invention provides a high-quality C-Mn steel with hydrogen-induced crack resistance and production process thereof. The production process is characterized in that (1) the steel is produced by using a continuous casting sheet billet, wherein the thickness of the sheet billet is 150-300 mm, and the width is 1000-3000 mm; (2) the specification of a rolled steel plate is that the thickness of thesteel plate is 5-40 mm, and the width of the steel plate is 2000-3500 mm; and (3) after the sheet billet is rolled into the steel plate with the final specification, rapid cooling is carried out on the steel plate, and the temperature of the surface of the steel plate ranges from 750 DEG C to 820 DEG C when cooling is started, the surface temperature of the steel plate is 550-650 DEG C when cooling is completed, and the cooling rate is 20 DEG C/s-40 DEG C/s. According to the production process, the diffusion of carbon elements is inhibited through rapid cooling in the steel plate phase changeprocess, so that the segregation degree of the core part of the steel plate is reduced, and the uniformity of the steel plate is improved; and the C-Mn steel produced by the production process has good hydrogen-induced crack resistance.

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