摘要
采用显微硬度仪、X射线衍射仪及透射电镜对ECAP法挤压后并进行热处理的7003铝合金进行了组织及力学性能研究。结果表明:经过4道次挤压后,随退火时间的延长和保温温度的升高,试样内部的缺陷减少,位错密度下降,试样的硬度下降,并确定退火温度160℃,保温时间1h为最佳的热处理工艺;通过对X-射线衍射结果分析,发现挤压后的材料在不同的退火温度处理后并没有新相出现,从峰值强度可以看出在160℃退火温度下,保温1h晶粒最为细小。
The microstructure and mechanical properties of 7003 aluminum alloy after ECAP were studied using mierohardness tester, XRD and TEM. The results show that, after four times of extrusion, with the increase of annealing time and the heat preservation tempera^re, the internal defects, dislocation density and hardness decrease, and the annealing temperature 160 ℃, and holding for 1 h are the best heat treatment process. The XRD analysis shows that extrusion materials through different annealing temperature treatments do not appear new phase. The peak intensity reveals that heat preservation for 1 h gets the smallest grains under the annealing temperature of 160 ℃.
出处
《热加工工艺》
CSCD
北大核心
2012年第20期148-151,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(E041604)
