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发明公开
CN104630623A 具有高扩孔性能的热轧酸洗带钢及其生产方法 有权

具有高扩孔性能的热轧酸洗带钢及其生产方法
摘要：
本发明公开了一种具有高扩孔性能的热轧酸洗带钢，其化学质量百分比为：C：0.05～0.1％、Si≤0.05％、Mn：0.8～1.2％、P≤0.02％、S≤0.006％、Nb：0.01～0.05％，其余是Fe及不可避免杂质。本发明还公开了一种生产上述具有高扩孔性能的热轧酸洗带钢的方法。本发明提供的具有高扩孔性能的热轧酸洗带钢及其生产方法，通过对化学成分的控制及轧制、酸洗工艺参数的控制，使得成产出来的带钢微观金相组织为铁素体+贝氏体，其中贝氏体组织所占体积比10～20％，该带钢抗拉强度≥540MPa，扩孔率λ≥100％，具备优异的带钢表面质量。
摘要（英）：

The invention discloses a high-reaming-property hot-rolled acid-washed steel strip which comprises the following components in percentage by chemical mass: 0.05-0.1% of C, at most 0.05% of Si, 0.8-1.2% of Mn, at most 0.02% of P, at most 0.006% of S, 0.01-0.05% of Nb, and the balance of Fe and inevitable impurities. The invention also discloses a method for producing the high-reaming-property hot-rolled acid-washed steel strip. By controlling the chemical components and the technological parameters for rolling and acid washing, the microscopic metallurgical structure of the produced steel strip is ferrite+bainite, wherein the bainite structure accounts for 10-20 vol%. The tensile strength of the steel strip is greater than or equal to 540 MPa, and the reaming rate lambda is greater than or equal to 100%. The steel strip has excellent surface quality.

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