1860MPa级Φ21.60mm PC钢绞线研制

介绍大直径高强度盘条开发的要点,采用添加Cr和V等合金元素以及先进控冷工艺,提高盘条的起始强度和加工硬化率,生产的YL82B-1盘条抗拉强度超过1 200 MPa,钢丝抗拉强度超过1 910 MPa,延伸率超过3.0%,可满足钢丝钢绞线性能要求。采用合金化和EDC处理的Φ16.0 mm YL82B-1盘条生产的1 860 MPa级Φ21.60 mm PC钢绞线抗拉强度大于1 860 MPa,延伸率达到5.5%,满足GB/T 5224—2003要求,可实现批量生产。

Development of I 860 MPa grade diameter 21.60 mm PC stranded wire

To introduce the development main point of large diameter high strength wire rod ： adopts adding alloy element such as Cr, V and advanced cooling control process to raise initial wire rope strength and processing hardening rate, the tensile strength of produced YL82B - 1 wire rod surpass 1 200 MPa, tensile strength of steel wire surpass 1 910 MPa, elon- gation surpass 3, 0% , which can meet steel wire and stranded wire property demands. The tensile strength of 1 860 MPa grade diameter 21.60 mm PC stranded wire produced by diameter 16.0 mm YL82B - 1 wire rod with alloying and EDC treatment is more than 1 860 MPa, the elongation is up to 5.5% , which meet GB/T 5224-2003 demands, can realize batch production.