Study of ultrafine Ni80Cr20 alloy wire corrosion-head and through-die technology in cold drawing
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摘要: 采用冷拉拔技术制备超细Ni80Cr20合金丝，探索了电化学法烧头和超景深显微镜辅助穿模方法，开展了直径25.60 m的超细丝拉拔至21.14 m的烧头和穿模工艺研究。实验结果表明：采用电解电压为5 V,0.2 mol/L的HCl溶液，烧头时间为1 s，超景深显微镜200倍放大模式，成功拉制直径为21.14 m的微丝；电化学法可以精确控制烧头电压和时间，同时超景深显微镜可以放大金刚石模具孔径，解决了烧头时间控制不准确和人工穿模的难题，显著提高了穿模效率和成功率。Abstract: The ultrafine Ni80Cr20 alloy wire was prepared by cold drawing technology. To improve the through-die efficiency in ultrafine Ni80Cr20 alloy wire preparation, we explored a new ultrafine wire corrosion-head and through-die method, by which an electrochemical workstation provided precise corrosion time and a super depth of field microscope magnified apertures of diamond dies. Afterwards, we did experiments on the corrosion-head and through-die process of the 25.60 m ultrafine Ni80Cr20 alloy wire. The research process was also carried out for the 25.60 m diameter ultrafine wire cold drawn to 21.14 m. The experiment results show that the electrolysis with voltage of 5 V, 0.2 mol/L HCl solution as electrolyte, a second corrosion time and aperture of die magnified 200 times, successfully prepared the 21.14 m ultra-fine wire. This method resolves the issue of corrosion-head time inaccuracy and manual through-die difficulty, greatly improves the efficiency and success rate of through-die.
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Key words:
- Ni80Cr20 alloy wire /
- cold drawing /
- corrosion-head /
- through-die /
- electrochemical corrosion /
- Z-pinch
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