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发明公开
CN110423938A TMCP型屈服500MPa级结构钢板及其生产方法 无效 - 驳回

TMCP型屈服500MPa级结构钢板及其生产方法
摘要：
本发明公开了一种TMCP型屈服500MPa级结构钢板及其生产方法，钢板化学成分组成及其质量百分含量为：C：0.05～0.09%，Si：0.2～0.3%，Mn：1.45～1.60%，P≤0.012%，S≤0.005%，Nb：0.03～0.04%，Cr：0.2～0.3%，V：0.03～0.05%，B：0.0008～0.0015%，Ti：0.01～0.02%，Alt：0.02～0.05%，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、冷却、堆垛缓冷。本发明钢板具有低碳当量和裂纹敏感性指数、低屈强比，低温冲击韧性优良，可用于桥梁、建筑、船舶、海洋平台和工程机械等领域。
摘要（英）：

The invention discloses a TMCP-type yield 500 MPa-grade structural steel plate and a production method thereof. The steel plate comprises the following chemical components of, by mass percent, 0.05%-0.09% of C, 0.2%-0.3% of Si, 1.45%-1.60% of Mn, less than or equal to 0.012% of P, less than or equal to 0.005% of S, 0.03%-0.04% of Nb, 0.2%-0.3% of Cr, 0.03%-0.05% of V, 0.0008%-0.0015% of B, 0.01%-0.02% of Ti, 0.02%-0.05% of Alt and the balance Fe and inevitable impurities. The production method comprises the following steps of smelting, continuous casting, heating, rolling, cooling, and stacking and slow cooling. The steel plate has the characteristics of low carbon equivalent and crack sensitivity index, low yield ratio and excellent low-temperature impact toughness, and can be applied tothe fields of bridges, buildings, ships, ocean platforms, engineering machines and the like.

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