热变形参数对铸态高强铝合金微观组织的影响  

The Influence of Hot Deformation Parameters on Microstructure Evolution of High Strength Aluminum Alloy with As-cast Starting Structures

作　　者：王鹏[1] 李萍[1] 刘景彬[1] 郝文玲[1] 范浩[1] 王百州 

机构地区：[1]太原科技大学机械工程学院,山西太原030024

出　　处：《科技创新与生产力》2015年第3期80-82,共3页Sci-tech Innovation and Productivity

基　　金：国家级大学生创新创业训练项目资助(201310109008);山西省大学生创新创业训练项目资助(2013236)

摘　　要：文中采用Gleeble-1500D热力模拟试验机对具有铸态初始组织的新型Al-Zn-Mg-Cu高强铝合金试样进行了热压缩试验,分析了热变形参数对该合金铸态组织在热变形过程中演变的影响。研究结果表明,热变形过程中,铸态树枝晶粒组织在热变形过程中变形拉长的同时,晶内树枝晶界在高温压缩扩散的作用下逐渐消失,转变为均匀的晶粒组织;析出相逐渐溶入基体组织;合适的热变形参数条件下,可以获得均匀的锻态组织。Hot compression tests of new Al-Zn-Mg-Cu alloy with as-cast and as-forged starting structures are carry out by Gleeble-1500 D thermo-mechanical simulator. The author analyzes the influence of hot deformation parameters on microstructure evolution of the high strength aluminum alloy with as-cast starting structure. The investigation indicate that as-cast dendritic grains elongate under the applied compression conditions, while interdendritic boundaries in as-cast coarse grains disappear gradually due to diffusion at higher temperatures, and transformed to uniform microstructure; Precipitates resolved into matrix during hot deformation gradually; the uniform deformed microstructure can be obtained at proper hot deformation parameters.

关 键 词：高强铝合金 热变形 组织演变 

分 类 号：TG146.2[一般工业技术—材料科学与工程]