LD7铝合金热变形行为的实验研究  

Experimental Study on the Hot Deformation Behavior of the LD7 Aluminum Alloy

作　　者：刘芳[1] 杨玉英[1] 吕炎[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：《热加工工艺》2003年第2期4-6,共3页Hot Working Technology

摘　　要：在 Gleeble- 15 0 0热模拟试验机上对 L D7铝合金试样在变形程度为 6 0 % ,变形温度为 36 0～ 480℃、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。根据试验结果分析热变形参数对合金流动应力和固溶之后显微组织的影响 ,可以得到如下结论 :L D7铝合金是动态回复型合金 ,合金的流动应力随温度的升高而降低 ,随应变速率的升高而升高 ;合金的晶粒尺寸随温度的升高而增大 ,随变形程度和变形速率的增大而减小。A series of hot compression experiments were conducted with LD7 aluminum alloy specimens on the Gleeble-1500 thermal simulator under different conditions of strain(60%), temperatures(360~480℃) and strain rates(0.01~1 s -1 ), then specimens were subjected to the solution treatment. Analyses of the influence of hot deformation parameters on the real stress and microstructure of the LD7 aluminum alloy show that LD7 aluminum alloy is a kind of dynamic recovery alloy; flow stress declined with the increasd of temperature and the decreasd of strain rates; its grain size declined with the increasd of the deformation and the strain rate, while it increased with the increasd of the deformation temperature.

关 键 词：LD7铝合金 热变形参数 流动应力 微观组织 

分 类 号：TG316[金属学及工艺—金属压力加工]