1960 MPa级17.8 mm预应力热镀锌钢绞线研制  

Development of 1960 MPa grade diameter 17.8 mm prestressed hot-dip galvanizing steel strand

作　　者：严士兴 陶建春 徐亮 Yan Shixing;Tao Jianchun;Xu Liang(Jiangyin Fasten Iron and Steel Products Co.,Ltd.,Jiangyin 214445,China)

机构地区：[1]江阴法尔胜钢铁制品有限公司,江苏江阴214445

出　　处：《金属制品》2021年第6期6-8,24,共4页Metal Products

摘　　要：介绍1960 MPa级17.8 mm预应力热镀锌钢绞线研制过程。试验选用14.0 mm 90钢盘条,抗拉强度1380 MPa左右、断面收缩率32%以上;采用体积分数18%的盐酸酸洗,去除盘条表面氧化铁皮;经磷化、皂化处理后,烘干表面;盘条拉拔成钢丝时,顺着轧制方向进线拉拔;热镀锌时控制钢丝锌层面质量。给出钢绞线捻制及稳定化处理工艺参数:捻制线速度50 m/min,捻距(258±10)mm,张力为(165±3)kN,感应加热温度370~380℃。试验结果表明,研制的预应力热镀锌钢绞线抗拉强度2010~2050 MPa,延伸率5.0%~5.5%,应力松弛率小于2.5%,其他技术指标符合GB/T 33363—2016要求。To introduce development process of 1960 MPa grade diameter 17.8 mm prestressed hot-dip galvanizing steel strand.Diameter 14.0 mm 90 steel wire rod is used in test,tensile strength is about 1380 MPa,area reduction is more than 32%.Surface iron oxide of wire rod was removed by 18%hydrochloric acid pickling,after phosphating,saponification treatment and drying surface.When wire rod is drawn,it is drawn along the rolling direction.Control steel wire zinc coating mass quality during hot-dip galvanizing.The technological parameters of steel strand laying and stabilizing treatment are given as follows:wire laying speed 50 m/min,lay length(258±10)mm,tension(165±3)kN,induction heating temperature 370~380℃.Test results show that tensile strength of developed prestressed hot-dip galvanized steel strand is 2010~2050 MPa,elongation is 5.0%~5.5%,stress relaxation rate is less than 2.5%,other technical indexes conform to GB/T 33363—2016.

关 键 词：预应力钢绞线 热镀锌 抗拉强度 稳定化处理 捻距 

分 类 号：TG356.46[金属学及工艺—金属压力加工]