均匀化退火工艺对5A83铝合金铸锭组织及性能的影响杨龙,代敏,车云,门三泉,李祥(贵州华科铝材料工程技术研究有限公司,贵州贵阳550014)摘要:本文研究了5A83铝合金均匀化退火工艺,并探索了不同温度条件对其微观组织及性能的影响。在退火时长为15h的情况下,分别观察了350、400、440、470、485、540℃6种不同退火温度下的显微组织变化,测量了其晶粒尺寸与硬度。结果表明,β相和Mn相交互作用的特征为:当退火温度低于400℃时,β相的回溶与过饱和Mn相的析出同时进行,后者对晶粒粗化的作用掩盖了前者对晶粒的细化作用;当退火温度高于440℃时,Mn相的回溶对晶粒细化发挥主导作用,对反常态(随着均匀化退火温度升高,基体硬度先下降后上升)给出了合理解释,并认为485℃是最为理想的退火温度。关键词:5A83铝合金;工业化生产;均匀化退火工艺;组织性能中图分类号:TG156文献标识码:A文章编号:1000-8365(2023)03-0268-06EffectoftheHomogenizationAnnealingProcessontheMicrostructureandPropertiesof5A83AluminumAlloyIngotYANGLong,DAIMin,CHEYun,MENSanquan,LIXiang(GuizhouHuakeAluminumMaterialsEngineeringResearchCo.Ltd.,Guiyang550014,China)Abstract:Thehomogenizationannealingprocessof5A83aluminumalloywasstudiedtoexploretheeffectsofdifferenttemperatureconditionsonitsstructureandproperties.Undertheconditionofanannealingtimeof15h,themicrostructureevolutionatdifferentannealingtemperaturesof350,400,440,470,485and540℃wasobservedandthegrainsizeandhardnessweremeasured.TheresultsshowthattheinteractionbetweentheβphaseandMnphaseischaracterizedasfollows:whentheannealingtemperatureislowerthan400℃,dissolutionoftheβphaseandprecipitationofthesupersaturatedMnphaseoccursimultaneously,andthecoarseningeffectofthelatteronthegrainsizeconcealstherefiningeffectoftheformeronthegrainsize.Whentheannealingtemperatureisabove440℃,theredissolutionoftheMnphaseplaysaleadingroleingrainrefinement.Areasonableexplanationisgivenfortheabnormalstate(thematrixhardnessdecreasesfirstandthenincreaseswithincreasinghomogenizingannealingtemperature),and485℃isthemostidealannealingtemperature.Keywords:5A83aluminumalloy;industrialproduction;homogenizationannealingprocess;microst...