热变形参数对LD7铝合金显微组织的影响  

Influences of Hot Deformation Parameters on the Microstructure of LD7 Aluminum Alloy

作　　者：刘芳[1] 吕炎[1] 杨玉英[1] 单德彬[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《金属成形工艺》2003年第3期26-27,36,共3页Metal Forming Technology

摘　　要：在Gleeble 15 0 0热模拟试验机上对LD7铝合金试样在变形程度为 6 0 %、变形温度为36 0～ 4 80℃、变形速率为 0 .0 1～ 1s-1的条件下进行等温压缩试验 ,然后对其进行固溶处理。分析热变形参数对合金固溶后显微组织的影响 ,可以得到如下结论 :LD7铝合金的晶粒尺寸随温度的升高而增大 ,随变形程度的增大而减小 。A series of thermo compression experiments were conducted with LD7 aluminum alloy specimens on Gleeble 1500 thermal simulator under different conditions of strain, temperatures and strain rates, after which specimens were subject to the solution treatment. Analyses of the influence of hot deformation parameters on the microstructure of the LD7 aluminum alloy show that the grain size of the LD7 aluminum alloy declines with the increase of the deformation and the strain rate, while it increases with the increase of the deformation temperature.

关 键 词：铝合金 显微组织 热模拟试验机 热变形参数 等温压缩试验 固溶处理 

分 类 号：TG146.21[一般工业技术—材料科学与工程]