新技术新工艺2023年第7期68《新技术新工艺》试验与研究激光选区熔化Cu-10Sn合金组织和性能研究*任政,曹明轩,王敏,苏康境,劳子彬(五邑大学智能制造学部,广东江门529000)摘要:激光选区熔化(Selectivelasermelting,SLM)作为一种新型的增材制造技术,在铜合金的生产中越来越受到重视。采用SLM的方法成形了Cu-10Sn合金试样,研究了工艺参数(激光功率、扫描速度、扫描间距)对SLM成形件致密度的影响,分析了不同工艺参数下的微观组织演变及力学性能变化规律。经过工艺参数优化,获得了最高致密度为99.26%的试样,并研究了其在退火热处理前后的组织演变和力学性能差异。结果表明,SLM成形铜锡合金的显微组织由α-Cu相及其亚稳相和极少的δ相组成,热处理后亚稳相高温分解,使得显微微观组织更加均匀化。铜锡合金的力学性能随着退火热处理温度的升高有所降低,但其塑性增强较为明显。该研究结果为分析热处理对SLM成形铜锡合金材料的显微组织和性能的影响提供了实验依据,对该材料的应用有一定的参考价值。关键词:激光选区熔化;铜锡合金;热处理;显微组织;力学性能中图分类号:TN249文献标志码:AResearchonCu-10SnAlloyStructureandPropertiesofLaserSelectiveMeltingRENZheng,CAOMingxuan,WANGMin,SUKangjing,LAOZibin(FacultyofIntelligentManufacturing,WuyiUniversity,Jiangmen529020,China)Abstract:Selectivelasermelting(SLM),asanewadditivemanufacturingtechnology,hasbeenpaidmoreandmoreat-tentionintheproductionofcopperalloys.TheCu-10SnalloysampleswereformedbySLMmethod,itwasstudiedthattheeffectsoftheprocessparameters(laserpower,scanningspeed,scanningdistance)onthedensityoftheSLMformingparts,andthemicrostructureevolutionandmechanicalpropertiesunderdifferentprocessparameterswereanalyzed.Themicrostructureevolutionandmechanicalpropertiesofthesampleswiththehighestdensityof99.26%werestudiedaftertheprocessparameterswereoptimized.TheresultsshowedthatthemicrostructureofSLMformedCu-Snalloywascomposedofα-Cuphase,metastablephaseandverylittleδphase,andthemetastablephasedecomposedathightemperatureafterheattreatment,whichmadethemicrostructuremoreuniform.ThemechanicalpropertiesofCu-Snalloydecreasedwiththein-creaseofannealingtemperature,butitsshapeenhancementwasobvious.Theresultsprovidedanexperimen...
