摘要
介绍1860 MPa级1×19—28.6低松弛预应力钢绞线的研制过程。试验选用抗拉强度为1300 MPa、断面收缩率大于30%的φ14 mm82B专用盘条;将盘条在质量分数15%～20%盐酸溶液中去除氧化铁皮后,进入磷酸二氢锌为主液的槽中进行磷化处理,然后浸入90～100℃的皂液中皂化,最后在100℃左右的烘箱中烘干;拉拔钢丝时严格按盘条轧制方向顺向拉拔。给出捻制稳定化工艺参数:捻距400 mm,捻制速度25 m/min,张力330 kN,温度385～390℃。试验结果表明,采用上述工艺研制的钢绞线抗拉强度为1 868～1 904 MPa,延伸率为6.0%～8.5%,松弛率为1.6%,各项性能指标完全符合企业标准。
To introduce the research development of 1 860 MPa grade 1 ×19 - 28.6 low relaxation pre-stressed steel strand. Choosing diameter 14 mm 82B wire rod with tensile strength 1 300 MPa and percentage reduction of area over 30% to test; to remove rod＇s scale in mass fraction 15% - 20% hydrochloric acid, and process phosphorization treatment in mainly zinc dihydric phosphate slot, then process saponication in 90 - 100 ℃ soap liquid, and finally to dry in 100 ℃ oven. To draw steel wire in a regular way by rod＇s rolling direction while drawing. Spinning stability technological parameter ： lay pitch 400 mm, spinning speed 25 m/min, tension 330 kN, temperature 385 -390 ℃. The test results show that if follow above technology, steel strand＇ s tensile strength is 1 868 - 1 904 MPa, elongation percentage is 6.0% - 8.5% , relaxation rate is t. 6%. All performance parameters measure up to enterprise＇ s standard.
出处
《金属制品》
2011年第1期33-35,40,共4页
Metal Products
基金
住房和城乡建设部软科学研究项目/研究开发项目
编号2010-K8-7
关键词
预应力钢绞线
大直径
抗拉强度
钢丝拉拔
稳定化处理
pre-stressed steel strand
big diameter
tensile strength
steel drawing, stabilizing
