大规格高强度钢绞线拉索及吊杆用Galfan合金镀层钢丝的生产

以5.0 mm 1 770 MPa级Galfan合金镀层钢丝为例,介绍大规格高强度钢绞线拉索及吊杆用Galfan合金镀层钢丝的生产。钢丝拉拔平均部分压缩率约18.79%。表面脱脂采用中温电解碱洗,氢氧化钠质量浓度为180~260 g/L,温度为80~95℃;酸洗采用盐酸常温酸洗,盐酸质量浓度为170~230 g/L;助镀剂氯化铵质量浓度为100~120 g/L,助镀温度为80~95℃;热镀锌温度为460℃,Dv值为180 mm·m/min,采用电磁擦拭技术确保锌层面质量≥420 g/m2。采用上述工艺生产的4.0 mm以上大规格Galfan合金镀层钢丝具有优良的耐腐蚀性能,使用寿命比普通镀锌产品长2~3倍,锌层面质量400~550 g/m2,且锌层表面光滑平整、直径均匀、外观光洁度好,可满足客户对大规格高强度钢绞线拉索及吊杆用Galfan合金镀层钢丝的质量要求。

Production of Galfan alloy coating steel wire for large size and high strength steel strand cable and hanger rod

To introduce production of Galfan alloy coating steel wire for large size and high strength steel strand cable and hanger rod taking diameter 5.0 mm 1 770 MPa grade Galfan alloy coating steel wire as example. Steel wire drawing average part compression ratio is about 18.79%. Surface degrease treatment adopts medium temperature electrolysis cleaning, mass concentration of NaOH is 180 - 260 g/L, temperature is 80 -95 ℃, pickling adopts HC1 normal temperature pickling, mass concentration of HC1 is 170- 230 g/L, flux NH4C1 mass concentration is 100 - 120 g/L, flux temperature is 80 -95℃, hot galvanizing temperature is 460 ℃ , Dv value is 180 mm - rn/min, electromagnetism wiping technology is adopted to assure zinc coating mass is not less than 420 g/m2, diameter over 4.0 mm large size Galfan alloy coating produced with a- bove process has good corrosion resistance property, service life is longer than common galvanizing product 2- 3 times, zinc coating mass is 400 -550 g/m2 , and zinc coating surface is smooth and fiat, diameter is even, appearance is bright- ness, which can meet the requirement of customers quality need on Galfan alloy coating steel wire for large size and high strength steel strand cable and hanger rod.