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发明公开
CN104357759A 一种抗拉强度≥1500MPa的输电铁塔用角钢 无效 - 驳回

一种抗拉强度≥1500MPa的输电铁塔用角钢
摘要：
一种抗拉强度≥1500MPa的输电用角钢，其组分及wt%为：C：0.45～0.60%、Si：2.10～2.50%、Mn：3.0～3.5%、P：≦0.025%、S：≦0.015%、B：0.005～0.008%、Ni：0.80～1.20%、V：0.08～0.16%、Cr：1.5～2.5%、Co：1.5～2.5%，其余为Fe和杂质元素。本发明屈服强度≥1200MPa，抗拉强度≥1500MPa，断后伸长率≥15%，-20℃冲击功Kv2≥60J，无需拼接，可使铁塔减重30%~40%，体积小，方便运输及维护，还可利用现有成熟工艺即可生产。
摘要（英）：

The invention provides a steel angle with no-less-than 1,500-MPa tensile strength for a steel pylon. The steel angle with the no-less-than 1,500-MPa tensile strength comprises the following components in percent by weight: 0.45-0.60% of C, 2.10-2.50% Si, 3.0-3.5% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.005-0.008% of B, 0.80-1.20% of Ni, 0.08-0.16% of V, 1.5-2.5% of Cr, 1.5-2.5% of Co and the balance of Fe and impurity elements. According to the steel angle with the no-less-than 1500-MPa tensile strength, the yield strength is no less than 1,200 MPa, the tensile strength is no less than 1,500 MPa, the percentage elongation after fracture is no less than 15%, the ballistic work Kv2 at -20 DEC C is no less than 60 J, no joint exists, the size is small, and the transportation and maintenance are convenient; by using the steel angle with the no-less-than 1,500-MPa tensile strength, the weight of the steel pylon is reduced by 30-40%; the steel angle with the no-less-than 1500-MPa tensile strength can be produced by an existing mature process.

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