固溶工艺对2A12铝合金组织与性能的影响  

Effect of solution treatment process on microstructure and properties of 2A12 aluminum alloy

作　　者：李侠 贾品峰[3] 耿旭 崔东卫 Li Xia;Jia Pinfeng;Geng Xu;Cui Dongwei(State Key Laboratory of Metallic Materials for Marine Equipment and Applications,Anshan Liaoning 114009,China;Ansteel Iron&Steel Research Institues,Anshan Liaoning 114009,China;College of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan Liaoning 114009,China)

机构地区：[1]海洋装备金属材料及其应用全国重点实验室,辽宁鞍山114009 [2]鞍钢集团钢铁研究院,辽宁鞍山114009 [3]辽宁科技大学材料与冶金学院,辽宁鞍山114009

出　　处：《金属热处理》2025年第4期213-217,共5页Heat Treatment of Metals

摘　　要：采用差热分析(DSC)、扫描电镜(SEM)、能谱分析(EDS)和X射线衍射(XRD)等手段,研究了2A12合金固溶过程中残余相的溶解行为。结果表明,轧制态2A12合金的过烧温度为509.6℃,合金中主要相为Al、Cu、Mg的非平衡凝固共晶残余相。固溶过程中,合金中的非平衡共晶相逐渐熔断并球化,偏析元素向基体中溶解;随着固溶温度的升高,试样的硬度增大,这是由于试样中的非平衡共晶相更多地溶入基体,基体固溶度提高,增加了溶质原子溶入溶剂晶格的数量,使硬度增大。Dissolution behavior of residual phases at grain boundaries during the solution process of 2A12 alloy was studied by using techniques such as differential scanning calorimetry(DSC),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),and X-ray diffraction(XRD).The results show that the overburning temperature of the 2A12 alloy is 509.6℃,and the main phases in the rolled state alloy are non-equilibrium solidification eutectic phases of Al,Cu,and Mg.During the solution treatment process,the non-equilibrium eutectic phase in the alloy gradually melts and spheroidizes,and the segregated elements dissolve into the matrix.As the solution treatment temperature increases,the hardness of the specimen increases.This is because more non-equilibrium eutectic phases in the specimen dissolve into the matrix,increasing the solubility of the matrix and increasing the number of solute atoms dissolved into the solvent lattice,resulting in an increase in hardness.

关 键 词：2A12铝合金 固溶处理 残余相 

分 类 号：TG166.3[金属学及工艺—热处理]