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发明公开
CN110453154A 一种700MPa级汽车扭力梁用钢材及其制备方法 有权

一种700MPa级汽车扭力梁用钢材及其制备方法
摘要：
本发明公开了一种700MPa级汽车扭力梁用钢材，包含以下质量百分含量的成分：C：0.03～0.12％、Si：0.05～0.18％、Mn：0.8～2.0％、P≤0.02％、S≤0.009％、Nb≤0.08％、Ti≤0.1％、Mo≤0.3％，Al≤0.2％，其余是Fe及不可避免杂质。对上述成分的钢材使用本发明公开的制备方法所制得的700MPa级汽车扭力梁用钢材可以在不进行热处理或喷丸处理的条件下达到优异的疲劳性能。
摘要（英）：

The invention discloses steel for a 700MPa grade automobile torsion beam. The steel comprises the following components of, in percentage by mass, 0.03-0.12% of C, 0.05-0.18% of Si, 0.8-2.0% of Mn, smaller than or equal to 0.02% of P, smaller than or equal to 0.009% of S, smaller than or equal to 0.08% of Nb, smaller than or equal to 0.1% of Ti, smaller than or equal to 0.3% of Mo, smaller than orequal to 0.2% of Al, and the balance Fe and inevitable impurities. According to the steel with the components, the steel for the 700MPa grade automobile torsion beam prepared by a preparation method can achieve excellent fatigue performance under the condition of not carrying out heat treatment or shot blasting treatment.

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