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天津钢厂出产的低炭镀锌钢丝几年来一直以铅锌法镀锌,钢丝光泽尚好,而且锌层很少发生开裂或掉皮现象.但这种镀锌钢丝只能耐1～2次硫酸铜试验,耐腐蚀性能较低,故只可作一般用途.1954年以来,用户部门要求生产质量较高的架空通讯用的低炭镀锌钢丝.要求的规格是:4公厘镀锌钢丝的硫酸铜试验须达到4次(此重1.12的硫酸铜),其他机械性能及电阻试验等均须符合部颁标准,并且要求五倍卷解试验不掉皮.我厂为了达到上述标准,曾在改进操作及设备上作了不少努力,一般标准要求均已逐步达到,但是五倍卷解试验却长期未能符合标准,
The low-carbon galvanized steel wire produced by Tianjin Steel has been galvanized by lead-zinc method for several years, the luster of steel wire is still good, and the zinc layer rarely cracks or peels off, but the galvanized steel wire can only withstand 1 or 2 times of copper sulfate Test, low corrosion resistance, it can only be used for general purposes. Since 1954, the user department requires the production of high quality low carbon galvanized steel wire for overhead communications. The required specifications are: 4 mm galvanized steel wire sulfuric acid Copper test to reach 4 times (this weight of copper sulfate 1.12), other mechanical properties and resistance tests must comply with the ministerial standards, and requires five times volume solution test can not be peeling. I plant in order to achieve the above criteria, Operation and equipment made a lot of efforts, the general standard requirements have gradually reached, but five times Juan coil test has failed to meet the standards for a long time,