新型形变热处理2618铝合金的显微组织与力学性能研究  

Microstructure and Mechanical Properties of Aluminum Alloy 2618 Prepared with New Thermomechanical Treatment

作　　者：伍波[1] 赵满秀[2] 刘婷婷[1] 苏旭平[1] 吴长军[1] 王建华[1,2] 

机构地区：[1]常州大学先进金属材料常州市重点实验室,江苏常州213164 [2]湘潭大学机械工程学院,湖南湘潭411105

出　　处：《航空材料学报》2013年第5期29-35,共7页Journal of Aeronautical Materials

基　　金：国家自然科学基金(51074030);江苏省青蓝工程资助

摘　　要：对2618铝合金进行了(1)固溶处理+峰值时效处理(T6),(2)固溶处理+ECAP+峰值时效处理,(3)固溶处理+ECAP+短时再结晶+峰值时效处理;采用光学显微镜对2618合金的晶粒组织进行了观察与分析;采用拉伸试验机对2618合金峰值时效处理后的力学性能进行了测试。研究结果表明,采用固溶处理+ECAP+短时再结晶+峰值时效处理能明显细化2618耐热铝合金的晶粒组织,有效提高该合金的综合力学性能;该新型形变热处理工艺是一种行之有效的2618铝合金强韧化方法。Aluminum alloy 2618 was prepared by three procedures.The three procedures are as follows：（1）solution treatment ＋peak aging treatment （T6）,（2）solution treatment ＋ ECAP ＋ peak aging treatment,（3）solution treatment ＋ ECAP ＋ short time recrystallization ＋ peak aging treatment.The grain microstructures and mechanical properties of the alloys were investigated by using optical microscope and tensile testing machine,respectively.The results indicated that the grain microstructure of alloy 2618 prepared with solution treatment ＋ ECAP ＋ short time recrystallization ＋ peak aging treatment was refined remarkably and the comprehensive mechanical properties of the alloy was enhanced effectively.The new thermomechanical treatment is a kind of effective method in improving the strength and toughness of aluminum alloy 2618.

关 键 词：2618铝合金 形变热处理 短时再结晶 晶粒组织 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]