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发明公开
CN104593669A 一种钢筋用钢及其生产方法 有权

一种钢筋用钢及其生产方法
摘要：
本发明涉及一种钢筋用钢及其生产方法，其化学成分按重量百分比的配比为：0.18-0.25％C，0.30-0.70％Si，1.20-1.60％Mn，≤0.035％P、≤0.035％S，0.03-0.06％V，0.008-0.012％N，0.01-0.06％Als，其余为Fe和不可避免的杂质元素。生产方法包括如下步骤：(1)按照配比和组分进行冶炼；(2)精炼；(3)小方坯连铸；(4)棒材轧机轧制；(5)冷却。本发明室温力学性能达到：屈服强度ReL≥400MPa，抗拉强度Rm≥540MPa，强屈比≥1.25，断后延伸率A≥15％，均匀伸长率Agt≥9％，表面质量优良、没有裂纹等表面缺陷。
摘要（英）：

The invention relates to steel for a rebar and a production method thereof. The steel comprises the following proportioned chemical components in percentage by weight: 0.18-0.25% of C, 0.30-0.70% of Si, 1.20-1.60% of Mn, at most 0.035% of P, at most 0.035% of S, 0.03-0.06% of V, 0.008-0.012% of N, 0.01-0.06% of Als, and the balance of Fe and unavoidable impurities. The production method comprises the following steps of: (1) smelting according to the proportion and number of components; (2) refining; (3) carrying out billet continuous casting; (4) rolling by a bar mill; (5) cooling. Room-temperature mechanical properties of the steel meet the following conditions: the yield strength ReL is not less than 400MPa, the tensile strength Rm is not less than 540MPa, the ratio of tensile strength and yield strength is not less than 1.25, the fracture elongation percentage A is not less than 15%, and the even percentage elongation Agt is not less than 9%; and the steel has good surface quality, and has no surface defects, such as cracks.

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