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发明公开
CN107868911A 一种屈服强度600MPa级热轧钢板及其制造方法 无效 - 驳回

一种屈服强度600MPa级热轧钢板及其制造方法
摘要：
本发明涉及一种屈服强度600MPa级热轧钢板及其制造方法，解决现有屈服强度600MPa级热轧钢板中存在的添加两种或多种合金元素或合金元素含量较高造成制造成本高的技术问题。本发明提供的一种屈服强度600MPa级热轧钢板，其化学成分重量百分比为：C:0.06～0.10％，Si:0.05～0.20％，Mn:1.20～1.60％，P≤0.02％，S≤0.01％，N≤0.0060％，Al:0.015～0.040％，Ti:0.04～0.06％，余量为铁和不可避免夹杂。本发明钢板的上屈服强度≥600MPa，断后伸长率A≥15％；主要用于汽车车厢底板、结构方管、工程机械、集装箱、铁路等领域。
摘要（英）：

The invention relates to a hot-rolled steel plate with yield strength being 600 MPa and a manufacturing method thereof. The technical problems that two or more alloying elements are added into an existing hot-rolled steel plate with the yield strength being 600 MPa, or the alloying element content is high resulting in the high manufacturing cost are solved. The hot-rolled steel plate with the yield strength being 600 MPa comprises the chemical compositions of, by weight, 0.06-0.10% of C, 0.05-0.20% of Si, 1.20-1.60% of Mn, no more than 0.02% of P, no more than 0.01% of S, no more than 0.0060%of N, 0.015-0.040% of Al, 0.04-0.06% of Ti, the balance iron and inevitable inclusions. According to the hot-rolled steel plate, the upper yield strength is greater than or equal to 600 MPa, the percentage elongation A after fracture is greater than or equal to 15%, and the hot-rolled steel plate is mainly used in the fields of car compartment bottom plates, structural square tubes, engineering machinery, containers, railways and the like.

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