φ0.71mm大规格胶管钢丝生产工艺探讨

采用φ5.50 mm C82DA盘条为原料,经过预处理干拉、热处理电镀、湿式拉拔工艺制备φ0.71 mm大规格胶管钢丝。干拉采用5道次拉拔,总压缩率约为70%;热处理电镀Dv值为50 mm·m/min,明火炉4个区的加热温度分别为1 060,1 040,1 020,980℃,单段水浴淬火长度300 cm;电镀采用先镀铜、后镀锌、再进行感应加热热扩散工艺,镀层附着量为4.0 g/kg,镀层中铜质量分数为67.0%;电镀钢丝经轧尖引模机穿模,由55 kW水箱拉丝机拉拔。结果表明,生产的φ0.71 mm胶管钢丝破断力为1 020～1 045 N,弯曲25～39次,扭转37～51次。

Discussion of diameter 0. 71 mm large hose wire production technology

To take diameter 5. 50 mm C82DA wire rod as raw material, after preprocessing dry-drawing, heat process elec- troplate and wet-drawing technology to produce diameter 0.71 mm large hose wire. Dry drawing uses 5 passes drawing and total draught is about 70% ;heat treat electroplating Dv value is 50 mm · m/min, open-fire furnace 4 sections＇ heating tem- perature are 1 060,1 040,1 020,980 ℃ single secion water bath quenching length is 300 cm; electroplating uses first cop- per plating, then galvanization and induction heating diffusion technology, coating attachment quality is 4. 0 g/kg, the cop- per mass fraction in the coating is 67. 0% ; electroplating wire to die through pointing machine and draw by 55 kW wet drawing machine. The result shows diameter 0. 71 mm hose wire breaking force is 1 020 - 1 045 N, bend reaches 25 ~ 39 times, torsion reaches 37 - 51 times.