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发明公开
CN109609840A 一种180～200mm厚度合金结构钢27SiMn及其生产工艺 有权

一种180～200mm厚度合金结构钢27SiMn及其生产工艺
摘要：
本发明公开了一种180～200mm厚度合金结构钢27SiMn及其生产工艺，包含如下质量百分比的化学成分：C：0.27～0.30、Si：1.2～1.4、Mn：1.2～1.3、P≤0.030、S≤0.030、B：0.0008～0.001、Ti：0.020～0.030，其余为Fe和残留元素。其生产工艺包括：转炉冶炼→LF精炼→VD真空脱气→模铸浇铸→加热→轧制→堆冷→热处理。本发明通过对合金结构钢27SiMn成分的合理设计，以及生产工艺的改进、参数精准控制等，获得了综合性能优良，厚度达180～200mm的合金结构钢27SiMn，更好地满足了客户要求。
摘要（英）：

The invention discloses alloy constructional steel 27SiMn with 180-200mm thickness and a manufacturing technology thereof. The alloy constructional steel 27SiMn is prepared from the chemical raw materials in percentage by mass: 0.27-0.30% of C, 1.2-1.4% of Si, 1.2-1.3% of Mn, no more than 0.030% of P, no more than 0.030% of S, 0.0008-0.001% of B, 0.020-0.030% of Ti, and the balance of Fe and residual elements. The manufacturing technology comprises the following steps of converter smelting, LF refining, VD vacuum degassing, die casting, heating, rolling, stacking cooling, and heat processing.The components of the alloy constructional steel 27SiMn are rationally designed, the manufacturing technology is improved, and parameters are accurately controlled, so that the alloy constructional steel 27SiMn with 180-200mm thickness and with a good combination property is obtained, and requirements of customers are better met.

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