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发明公开
CN102839318A HRB600钢筋及其生产方法 有权

HRB600钢筋及其生产方法
摘要：
本发明公开了一种HRB600钢筋及其生产方法，该钢筋按重量百分比由以下成分组成：C：0.21~0.25%、Mn：1.40~1.80%、Si：0.65~0.85%、V：0.08~0.12%、S≤0.020%、P≤0.025%、N：0.016~0.024%；其余为Fe和不可避免的杂质。其生产方法包括冶炼工序、精炼工序、连铸工序和轧制工序，在所述冶炼工序中采用钒氮微合金化，并且在所述精炼工序中向钢水中加入微氮合金进行增氮处理，以使HRB600钢筋按重量百分比含有0.08~0.12%的V和0.016~0.024%的N。该钢筋具有高屈服强度、高抗拉强度，高延伸率，而且微合金元素V的用量少，成本低。
摘要（英）：

The invention discloses an HRB600 steel bar and a production method thereof. According to percent by weight, the steel bar comprises the following constituents: 0.21-0.25 percent of C, 1.40-1.80 percent of Mn, 0.65-0.85 percent of Si, 0.08-0.12 percent of V, less than or equal to 0.02 percent of S, less than or equal to 0.025 percent of P, 0.016-0.024 percent of N and the balance of Fe and unavoidable impurity. The production method of the HRB600 steel bar comprises processes of smelting, refining, continuous casting and rolling, wherein in a smelting process, V-N micro-alloying is adopted, in a refining process, micro-N alloy is added into molten steel to perform nitrogen increasing treatment, so that the HRB600 steel bar contains 0.08-0.12 percent of V and 0.016-0.024 percent of N according to percent by weight. The steel bar has high yield strength, tensile strength and elongation characteristic, and is low in cost, and the consumption of micro-alloy element V is low.

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