多级时效对ZL114A合金组织和拉伸性能的影响  

Influence of Multi-artificial Aging on Microstructures and Properties of ZL114A Alloy

作　　者：全琪峰 董立新[1] 刘力菱[1] 方华伟 QUAN Qi-feng;DONG Li-xin;LIU Li-ling;FANG Hua-wei(Materials Science and Engineering,SouthWest JiaoTong University,Chengdu 610031;Chongqing Tiema Industrial Co.,Ltd.,Chongqing 400050,China)

机构地区：[1]西南交通大学材料科学与工程学院,成都610031 [2]重庆铁马工业集团有限公司,重庆400050

出　　处：《铝加工》2019年第6期27-29,共3页Aluminium Fabrication

摘　　要：研究了多级时效对ZL114A合金组织和拉伸性能的影响。研究结果表明,采用热处理工艺545℃×12h+55℃水淬+155℃×8h+175℃×8h,ZL114A合金材料试样的强度和塑性最好。因为此时,α-Al晶粒等轴化程度更高,晶粒度更小;同时使得共晶硅析出更充分,共晶硅晶粒圆化程度更高,多呈圆状和颗粒状,颗粒大小较一致,连续性和弥散性较好。The influence of multi-artificial aging on the microstructures and tensile properties of ZL114A alloy have been investigated.The results show that ZL114A alloy can achieve the best tensile properties after the heat treatment of 545℃×12h+55℃water quench⁃ing+155℃×8h+175℃×8h.Under this condition,there are more equiaxed and smallα-Al grains in the ZL114A alloy.Eutectic sili⁃con grains precipitate more fully and become more round and granular,of which sizes are consistent.In the meantime,eutectic silicon grains are homogeneously and continually distributed.

关 键 词：多级时效 ZL114A 显微组织 拉伸性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG156.92[金属学及工艺—金属材料]