均质制度对6082合金组织和性能的影响  

Effect of Homogenization Treatment on Microstructure and Properties of 6082 Alloy

作　　者：吴楠 谢方亮 张宇 代自莹 周丹桐 董博 WU Nan;XIE Fang-liang;ZHANG Yu;DAI Zi-ying;ZHOU Dan-tong;DONG Bo(Liaoning Zhongwang Group Co.,Ltd.,Liaoyang Liaoning 111003,China)

机构地区：[1]辽宁忠旺集团有限公司,辽宁辽阳111003

出　　处：《热处理技术与装备》2022年第4期27-30,共4页Heat Treatment Technology and Equipment

摘　　要：采用高温金相显微镜、SEM、EDS和电导率检测等方法研究了均质制度对6082合金组织、电导率和硬度的影响。结果表明:铸态6082合金从室温升高至560℃过程中,晶界逐渐变细,在晶界附近出现弥散相析出,并扩散至晶内;随着温度继续升高,尺寸小的弥散相回溶,而尺寸略大的弥散相继续生长。均质温度越高,晶界上残留着含Fe、Mn相也就越少;当均质制度为560℃×9 h时,晶界上残留相最少,晶内弥散相细小且分布均匀。随着均质温度的升高,合金电导率逐渐降低,而硬度却逐渐提高。The microstructure, conductivity and hardness of 6082 alloy after different homogenization treatment was studied by means of high temperature metallographic microscope, SEM, EDS and conductivity test ect. The results showed that the grain boundaries of as-cast 6082 alloy became smaller and finer from room temperature to 560 ℃. The dispersed phase precipitated near the grain boundaries, and diffused into the grain. As the temperature continued to rise, the smaller dispersed phases dissolved back, but the larger dispersed phases continued to grow. The higher the homogenization temperature, the less the residual phases with mainly containing Fe and Mn on the grain boundary. When the homogenization treatment was 560 ℃ × 9 h, there were few residual phases on the grain boundary, and then the intragranular dispersed phases were fine and uniformly distributed. With the increase of homogenization temperature, the conductivity of the alloy gradualloy decreased, while the hardness gradualloy increased.

关 键 词：6082合金 均质处理 组织 电导率 硬度 

分 类 号：TG166.3[金属学及工艺—热处理]