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在高级弹簧钢丝的生产中,由于扭转裂纹而造成的废品率,几乎占废品的50%,有时可达80%以上,严重影响高级弹簧钢丝成材率的提高。特别是1.5毫米以下的高级弹簧钢丝,改制成半成品重新生产的可能较小,造成原材料的严重损失。几年来,我们对有纹钢丝采取表拔的手段,使大量有纹钢丝改制成合格品,挽回了大量有纹钢丝,使高级弹簧钢丝的成材率有所
In the production of high-grade spring steel wire, the rejection rate due to the torsion crack is almost 50% of the scrap, sometimes more than 80%, seriously affecting the improvement of the yield of the advanced spring steel wire. Especially the advanced spring steel wire below 1.5mm may be less likely to be re-converted into semi-finished products, resulting in serious loss of raw materials. Over the past few years, we have adopted the tabular steel wire drawing means to make a large number of textured steel wire into qualified products, a large number of textured steel wire to restore, so that the rate of advanced spring steel wire