5186铝合金铸锭均匀化工艺研究  

Study on Homogenization Process of 5186 Aluminum Alloy Ingots

作　　者：张宇 孙亮 谢方亮 冯艳飞 吴楠 ZHANG Yu;SUN Liang;XIE Fang-liang;FENG Yan-fei;WU Nan(Liaoning Zhongwang Group Co.,Ltd.,Liaoyang Liaoning 111003,China)

机构地区：[1]辽宁忠旺集团有限公司,辽宁辽阳111003

出　　处：《热处理技术与装备》2020年第5期20-24,共5页Heat Treatment Technology and Equipment

摘　　要：采用DTA热分析、光学显微镜和扫描电镜(SEM)观察等方法,研究了5186合金铸锭的均匀化工艺。结果表明,5186合金铸锭的过烧温度为580.4℃。经均匀化处理后铸锭的抗拉强度上升,屈服强度、延伸率降低,460℃均匀化处理时合金力学性能最高,加工性能最好。5186合金最佳均匀化制度为460℃×18 h,铸锭的枝晶网络部分或完全固溶,晶界细化,非平衡共晶组织部分发生溶解,均匀化效果良好。The homogenization process of 5186 alloy ingot was studied by DTA thermal analysis,optical microscope and scanning electron microscope(SEM).The results show that the over-firing temperature of 5186 alloy is 580.4℃.After homogenization,the tensile strength of the ingot increases,the yield strength and elongation decrease,the mechanical properties and processing properties of alloy are the best when the homogenization temperature is 460℃.The best homogenization system of 5186 alloy is 460℃×18 h,the dendrite network of ingot is partial or complete solid solution,the grain boundary is refined,and the non-equilibrium eutectic structure is partially dissolved,so the homogenization effect is good.

关 键 词：5186铝合金 均匀化工艺 显微组织 力学性能 

分 类 号：TG156.21[金属学及工艺—热处理] TG166.3[金属学及工艺—金属学]