单晶铜超微细丝的断线分析及制备工艺

Origination of Wire Breakage in Ultra-fine Single Crystal Copper Wire Drawing and its Technical Improvement

对传统热型连铸单晶铜在拉制超微细丝过程中的断线进行分析,表明铜杆中O、S、H等杂质元素含量过高影响其拉制性能。针对高温熔融金属防氧化及除杂净化要求,引入横引式真空熔炼氩气保护定向凝固新工艺制备单晶铜并对其成分及拉制性能进行测试。结果表明,该工艺对熔体的提纯、除杂效果较好,能够满足键合丝坯料纯净度高、拉制性能好的要求。

The origination of wire breakage in traditional OCC(Ohno continuous casting) ultra-fine copper wire drawing was described.It is found that the deterioration of the ultra-fine wire drawing properties is resulted from the excessive content of oxygen,sulfur and hydrogen in the copper alloy.The horizontal vacuum melting directional solidification equipment with argon atmosphere which can remove hydrogen,oxygen and other undesirable element from molten copper is a-dopted to prepare the ultra-fine single crystal copper wire drawing.The chemical composition and properties of ultra-fine single crystal copper wire drawing prepared by the new technology were examined.The results reveal that the new technology obviously improves the properties of the copper wire drawing as a result of greatly decreasing the hydrogen,oxygen and other impurities content in the molten copper alloy.