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发明授权
CN109881079B 一钢多级镀锌低合金高强钢带及其生产方法 有权

一钢多级镀锌低合金高强钢带及其生产方法
摘要：
本发明公开了一钢多级镀锌低合金高强钢带及其生产方法，其成分的质量百分含量为：C 0.06%～0.09%，Si≤0.10%，Mn 0.70%～0.90%，P≤0.020%，S≤0.010%，Als 0.020%～0.050%，Nb 0.020%～0.035%，Ti 0.015%～0.030%，N≤0.0060%，余量为Fe和不可避免的杂质；所述钢带的屈服强度级别覆盖300～450MPa。本钢带采用低碳低锰的成分设计，避免连铸偏析对产品性能造成影响；较目前应用较多的单Nb元素强化的低合金成分设计，本发明采用Nb、Ti复合强化的设计思路，有效减低了产品的合金成本；本钢带屈服强度级别覆盖300～450MPa，能通过生产工艺实现一钢多级，有效地降低了生产成本。
摘要（英）：

The invention discloses a one-steel multi-stage zinc plating low alloy high-strength steel belt and a production method thereof. The one-steel multi-stage zinc plating low alloy high-strength steel belt comprises the components of, by mass percentage, 0.06-0.09% of C, less than or equal to 0.10% of Si, 0.70-0.90% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.020-0.050% of Als, 0.020-0.035% of Nb, 0.015-0.030% of Ti, less than or equal to 0.0060% of N, and the balance Fe and unavoidable impurities. The yield strength grade of the steel belt covers 300-450 MPa. According to the steel belt, with the adoption of the low-carbon and low-manganese component design, the influence of continuous casting segregation on the product performance is avoided; compared withthe single Nb strengthened low alloy component design which is applied much at present, with the adoption of a Nb and Ti composite strengthened design thought, the alloy cost of a product is reduced;and the yield strength grade of the steel belt covers 300-450 MPa, and a one-steel multi-stage mode can be achieved through a production technology, so that the production cost is effectively reduced.

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