1960 MPa悬索桥主缆用高强度钢丝开发

Development of 1960 MPa high strength steel wire for suspension bridge main cable

φ5. 0 mm 1 960 MPa高性能镀锌铝合金钢丝对盘条钢的纯净度、成分微合金化、力学性能、金相组织等提出了更高的要求。通过工艺试验确定采用B87SiQL盘条作为原材料,对其夹杂物和力学性能进行分析,对盘条采用离线索氏体化处理来提高盘条的强度均匀性。采用国产盘条生产的φ5. 0 mm 1 960 MPa锌铝合金镀层钢丝抗拉强度均值2 043 MPa,扭转均值21次,满足技术指标要求。

Diameter 5.0 mm 1 960 MPa high properlies galvanized aluminum alloy steel wire put forward higher demand on purity, composition nfieroalloying, mechanical properlies, nfierostrueture of wire rod steel. Through technological test it is decided to take B87SiQL wire rod as raw material, its inclusion and mechanical properties are analyzed, the wire rod is treated with off-line sorbate to improve strength uniformity of wire rod. The tensile strength average value 2 043 MPa, torsion average value 21 of diameter 5.0 mm 1 960 MPa galvanized aluminum alloy steel wire produced with domestic wire rod, which meet technical requirement.