固溶处理对6082铝合金棒材粗晶环和力学性能的影响  

Effect of Solution Treatment on Coarse Grain Ring and Mechanical Properties of 6082 Aluminum Alloy Bars

作　　者：向晶[1] 谢尚昇[1] 李剑[1] 覃珊[1] 周文标 

机构地区：[1]广西南南铝加工有限公司,广西南宁530031

出　　处：《热加工工艺》2016年第20期200-203,206,共5页Hot Working Technology

基　　金：国家国际科技合作专项项目(2014DFA50210)

摘　　要：采用正交试验方法研究了固溶处理对6082铝合金棒材粗晶环深度和性能的影响。结果表明,固溶温度对粗晶环深度、抗拉强度和硬度的影响远大于保温时间和升温速率;粗晶环深度随着固溶温度的升高逐渐变深,棒材心部抗拉强度和硬度逐渐变大;挤压过程中铝合金组织的不均匀变形是制品在固溶处理过程产生粗大晶粒的主要原因,不均匀变形会导致基体晶粒晶界的界面能增加,晶核快速长大而形成粗晶环。通过对固溶工艺的优化可以将粗晶环深度控制在〈3.5 mm,抗拉强度〉395 MPa,棒材经碱洗之后直径减小量约为0.10~0.16 mm。Effec ts of solid solution treatment on the depth of coarse grain and properties of 6082 aluminum alloy bars were studied by using orthogonal experiment method. The results show that effects of solid solution temperature on the depth, tensile strength and hardness of coarse crystal ring are much greater than those of holding time and heating rate. The depth of the coarse crystal ring gradually increases with the increase of the solution temperature, and the tensile strength and hardness of the core part of the bar gradually become larger. The inhomogeneous deformation of aluminum alloy during extrusion is the main causes of producing coarse grains in the process of solid solution treatment. Inhomogeneous deformation can lead to the increase of interface energy of grain boundaries, and rapidly increase grain nucleus to form coarse grain ring. Through the optimization of the solution process, coarse grain ring depths can be controlled in less than 3.5 mm, and tensile strength is greater than 395 MPa. After the alkali wash the diameter of the rod is reduced by about 0.10-0.16 mm.

关 键 词：6082 铝合金棒材 固溶处理 粗晶环 力学性能 

分 类 号：TG166.3[金属学及工艺—热处理]