高纯铜丝断口分析研究

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中图分类号：TG115 文献标志码：A 文章编号：1004-4345（2025）04-0020-04

AbstractToadressthefracture isse during theproductionofhigh-puritycopper wires，systematicanalysis offracture surfaces andcopperrodbiletswasconductedusingscaning electron microscopy（SEM）formorphologicalobservationenergy-dispersive spectroscopy（DS）forareaanalysis，andX-raydifraction（XRD）.Theresultsrevealedtreecharacteristicregionsonthefracture surface：anoxidezone，adimplezone，andaninclusionzone.Fracture wasprimarilyatributed tolocalizedhighoxygencontentinthe wire，leadingtooxideenichmentatthefracturedgereducedbondingstrengthncreasedbritleness，andstressconcetration inducedbyinclusions.Tecopperrodbiletexhibitedapolycrystallnesructurewithcoarseandunevenlydistributed grais，where numerousinternalgrainboundarieseasilyinitiateddefectsandfractures.Basedonthefindings，adirectionalsolidificatioprocess combining hot mold continuous casting with high-vacuum smelting was proposed to produce single - crystal or quasi-single-crystal high-purity copper wires，eliminating transverse grain boundaries and improving processing performance.

Keywords high-purity copper wire; oxidation; fracture surface; microscopic morphology; grain

铜是世界上产量仅次于铁、铝的第三大战略金属，在我国国民经济中发挥着至关重要的作用。（剩余4165字）