AZ31合金的均匀化热处理及挤压变形研究  

Study on Homogenizing Treatment and Extrusion Deformation of AZ31 Alloy

作　　者：洪晓江 达则晓丽 HONG Xiaojiang;DAZE Xiaoli(School of Civil Engineering and Hydraulic Engineering,Xichang College,Xichang 615000,China;Sichuan Province University Key Laboratory of Bridge Non-destruction Detecting and Engineering Computing,Zigong 643000,China)

机构地区：[1]西昌学院土木与水利工程学院,四川西昌615000 [2]桥梁无损检测与工程计算四川省高校重点实验室,四川自贡643000

出　　处：《铸造技术》2018年第11期2588-2590,共3页Foundry Technology

基　　金：四川省教育厅科研项目(16ZB0264)资助

摘　　要：对比分析了铸态、均匀化态以及挤压变形后AZ31合金的显微组织,研究了挤压温度和挤压比对合金抗拉强度和断后伸长率的影响。结果表明,415℃×15 h均匀化后AZ31合金中的枝晶数量明显减少,粗大的颗粒状或者蠕虫状第二相基本消失,细小颗粒均匀分布在合金基体中;均匀化后AZ31合金在低温和大挤压比变形可以获得较高的塑性;随着挤压比增大,均匀化后挤压变形的AZ31合金的抗拉强度和断后伸长率都表现为逐渐增加的趋势。Microstructure of as-cast,homogenized and extruded AZ31 alloy was comparative analyzed,the effect of extrusion temperature and extrusion ratio on tensile strength and elongation was studied.The results show that after homogenization at 415 ℃ for 15 h,the dendrite number is significantly reduced,the coarse granular or wormlike second phase disappeared,and fine particles are uniformly distributed in the matrix.After homogenization,AZ31 alloy could obtain higher plasticity at low temperature and with large extrusion ratio.With the increase of extrusion ratio,the tensile strength and elongation after fracture of AZ31 alloy after extrusion deformation are gradually increasing.

关 键 词：AZ31合金 铸态 均匀化 挤压变形 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]