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发明公开
CN108950389A 一种低成本屈服490MPa级水电钢板及其生产方法 审中-实审

一种低成本屈服490MPa级水电钢板及其生产方法
摘要：
本发明公开了一种低成本屈服490MPa级水电钢板及其生产方法，钢板化学成分组成及其质量百分含量为：C：0.05～0.07%，Si：0.20～0.40%，Mn：1.50～1.60%，P≤0.015%，S≤0.010%，Cr：0.20～0.30%，Nb：0.03～0.04%，Ti：0.010～0.020%，Al：0.020～0.040%，B：0.0010～0.0020%，余量为Fe和不可避免的杂质；生产方法包括冶炼、连铸、加热、轧制及回火工序。本发明采用碳、锰固溶强化，通过优化钢中合金元素配比，采用两阶段控轧控冷工艺，产品具有低成本、优良的低温韧性及综合性能，可广泛用于水电工程，应用前景广阔。
摘要（英）：

The invention discloses a low-cost yielding 490MPa-grade hydroelectricity steel plate and a production method thereof. The low-cost yielding 490MPa-grade hydroelectricity steel plate comprises the following chemical components in percentage by mass: 0.05-0.07% of C, 0.20-0.40% of Si, 1.50-1.60% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.20-0.30% of Cr, 0.03-0.04% of Nb, 0.010-0.020% of Ti, 0.020-0.040% of Al, 0.0010-0.0020% of B and the balance Fe and inevitable impurities. The production method comprises the following steps of: smelting, carrying out continuous casting, heating, rolling and tempering. The carbon and the manganese are used for solid solution strengthening; and by optimizing the proportion of alloying elements in the steel and adopting atwo-stage controlled rolling and controlled cooling technology, the product has low cost, excellent low-temperature toughness and combination property, and wide application prospect, and can be widelyapplied to hydroelectric engineering.

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