Al-1.3Si-1.2Mg-0.7Mn-0.6Cu铝合金的回归处理  

Regression treatment of Al-1.3Si-1.2Mg-0.7Mn-0.6Cu aluminium alloy

作　　者：宋文举[1] 田妮[1] 权力伟[1] 赵刚[1] 刘春明[1] 左良[1] 

机构地区：[1]东北大学金属材料微结构设计与控制辽宁省重点实验室,辽宁沈阳110004

出　　处：《轻合金加工技术》2006年第5期44-47,53,共5页Light Alloy Fabrication Technology

摘　　要：研究Al-1.3Si-1.2Mg-0.7Mn-0.6Cu合金固溶处理、淬火、室温停放14 d(T4状态)后,再经150℃~262℃,1 min^120 min的回归处理对合金性能和组织的影响。结果指出:T4状态的Al-1.3Si-1.2Mg-0.7Mn-0.6Cu合金,在170℃以下人工时效不超过30 min时,其硬度低于时效前(T4状态)的硬度,欲在30 min之内,获得显著的烤漆硬化效应,烤漆温度不低于170℃。这种合金经T4处理后,再在170℃、190℃、212℃、236℃时效处理,析出具有明显硬化作用的过渡相的时间分别超过60 min、12 min、4 min、2 min。The effects of regression treatment（150℃ - 262℃ 1 min - 120 min）on the properties and microstructure of the Al-1.3Si-1.2Mg-0.7Mn-0.6Cu alloy was investigated, after solution treatment, quenching to water and storage at room temperature for two weeks（T4 temper）. The results showed that the hardness of the T4 temper alloy after artificial aging below 170℃ for less than 30 min was lower than that before artificial aging. If it was expected to obtain significant paint bake response, during the 30 min, the temperature of paint baking must surpass 170℃ .The alloy was treated by T4 temper and then aged at 170℃, 190℃ ,212℃ ,236℃,the time of remarkable precipitation of metastable phases which enhanced significantly the hardness of matrix must exceed 60 min, 12 min,4 min, 2 min, respeeively.

关 键 词：AlMgSiCuMn合金 回归处理 烤漆硬化 时效 

分 类 号：TG156.9[金属学及工艺—热处理]