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CN101845587B 屈强比≤0.8的热轧U型钢板桩用钢及其生产方法 失效 - 权利终止

屈强比≤0.8的热轧U型钢板桩用钢及其生产方法
摘要：
本发明属于屈强比小于0.8的热轧U型钢板桩用钢及其生产方法，其化学成分及重量百分比为：C 0.12～0.20％、Mn 1.0～1.8％、Si 0.22～0.5％、P≤0.02％、S≤0.02％、Als 0.01～006％、V 0.02％～0.18％、Ca 0.001～0.008％，其余为Fe及不可避免的杂质，其生产方法，步骤：进行冶炼；进行转炉精炼；在转炉精炼结束前5-10分钟时按照3-5米/吨钢开始加入Al线；在转炉精炼结束前2.5～7分钟时按照3-10米/吨钢开始加入Si-Ca线；进行连铸；将连铸坯加热到1150-1250℃；进行轧制。
摘要（英）：

The invention belongs to steel with a yield ratio no larger than 0.8 for hot rolling a U-shaped steel sheet pile and a production method thereof. The steel comprises the following chemical components in percentage by weight: 0.12-0.20% of C, 1.0-1.8% of Mn, 0.22-0.5% of Si, no more than 0.02% of P, no more than 0.02% of S, 0.01-0.06% of Als, 0.02-0.18% of V, 0.01-0.08% of Ca and the balance of Fe and inevitable impurities; and the preparation method thereof comprises the following steps: smelting; refining in a converter; starting to add Al wires based on 3-5m/ton steel from the moment 5-10 minutes before finishing refining in the converter; starting to add Si-Ca wires based on 3-5m/ton steel from the moment 2.5-7 minutes before finishing refining in the converter; carrying out continuous casting; heating continuously cast blooms to 1150-1250 DEG C; and rolling.

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