含锶钪2099铝锂合金的固溶处理  

Solution treatment of 2099 Al-Li alloy with Sr and Sc additives

作　　者：吴瑶[1] 许晓静[1] 张振强[1] 宋涛[1] 张允康[1] 罗勇[1] 邓平安[1] 

机构地区：[1]江苏大学先进制造与现代装备技术工程研究院,江苏镇江212013

出　　处：《金属热处理》2013年第4期40-44,共5页Heat Treatment of Metals

基　　金：江苏省工业科技支撑计划项目(BE2008118);江苏大学"拔尖人才培养工程"基金(1211110001)

摘　　要：采用组织观察、XRD分析、硬度和导电率测试、晶间及剥落腐蚀试验,研究了一种含锶钪2099型铝锂合金的固溶处理工艺。研究发现,该合金经540℃×2 h固溶或540℃×2 h+550℃×2 h两种固溶处理,并且经过121℃×14 h+181℃×48 h二次时效后,合金的硬度、导电率、抗晶间腐蚀和抗剥落腐蚀性能都处于较高水平且相差不大。结果表明,540℃×2 h+550℃×(0～2)h固溶处理提高了含锶钪2099铝锂合金的硬度和导电率,是该合金适宜的时效处理工艺。The solution treatment of 2099 A1-Li alloy with Sr and Sc additives was investigated by OM, XRD analysis, hardness and conductivity testing, intergranular and exfoliation corrosion testing. The results show that after the solution treatment of either 540 ℃ × 2 h or 540 ℃ ~ 2 h ＋ 550 ℃ × 2 h and the double aging treatment （ 121 ℃ × 14 h ＋ 181 ℃ × 48 h）, the alloy＇s hardness, electricity conductivity, intergranular and exfoliation corrosion resistance are full in high levels. The solution treatment of 540 ℃ × 2 h ＋ 550 ℃ × （0-2） h improves the hardness and electricity conductivity of the alloy. It is an optimal process for 2099 A1-Li alloy with Sr and Sc additives.

关 键 词：2099铝锂合金 固溶处理 硬度 导电率 抗腐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]