刘胜胆,张新明,黄振宝,杜予晅,周卓平

• 1:中南大学材料科学与工程学院
• 2:中南大学材料科学与工程学院
• 3:中南大学材料科学与工程学院
• 4:中南大学材料科学与工程学院

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)和X射线衍射谱仪研究了固溶处理对高纯7055铝合金组织的影响。结果表明:合金固溶时,粗大的初生AlZnMgCu相溶解缓慢,并逐渐球化;而初生AlZnMgCuFeTi相几乎不溶解。固溶温度越高(460-480℃),时间越长(0-240min),初生AlZnMgCu相溶解越多,再结晶越多,晶粒尺寸越大。再结晶主要于初始晶界上的粗大初生相上形核(PSN机制),并向弥散Al3Zr粒子少的变形晶粒内部长大。490℃固溶时,出现过烧组织,晶粒粗大。分级固溶较单级固溶可更好的控制合金组织,如460℃×120min+480℃×60min与480℃×180min相比,再结晶和晶粒尺寸小得多,但初生AlZnMgCu相溶解程度相差不大。

关键词(KeyWords)： 高纯7055铝合金;固溶;初生AlZnMgCu相;再结晶

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(2005CB623700);; 国家自然科学重点基金(50230310);; 博士点基金(2004053304)

作者(Author): 刘胜胆,张新明,黄振宝,杜予晅,周卓平

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