均匀化冷却速率对6005A铸锭组织性能的影响  

Effect of Cooling Rate on Homogenization Treatment for 6005A Aluminum Alloy

作　　者：孙文超 吴敬哲 于金凤 

机构地区：[1]丛林集团有限公司,龙口265705

出　　处：《铝加工》2016年第3期22-25,共4页Aluminium Fabrication

摘　　要：研究了6005A合金均匀化处理后不同冷却速率下金相组织、硬度及电导率的变化规律。随冷却速率的增加,铸锭中针状的Mg2Si相逐渐减少,黑色粒状Mn、Cr的化合物质点逐渐细化;铸锭的硬度值逐渐升高,电导率值逐渐降低。通过适当调控均匀化后冷却速率,可以改变Mg2Si相、Mn、Cr化合物的形态和分布,进而影响挤压时铸棒的变形抗力和型材的粗晶层厚度,达到改善型材质量的效果。The microstructure, hardness and conductivity under different cooling rate after homogenization treatment of 6005A alloy have been investigated. With the increase of cooling rate, the acicular Mg2Si phage of ingot decreases, the black granular composite particles contained Mn and Cr are refined; the hardness of ingot increases gradually, the conductivity of ingot decreases. By controlling cooling rate after homogenization, the shape and distribution of Mg2Si phase and composite could be changed, and the deformation resistance of ingot and the coarse grain thickness of profile are affected, to improve the quality of the profile.

关 键 词：均匀化冷却速率 6005A合金 电导率 硬度 

分 类 号：TG292[金属学及工艺—铸造]