AZ31D/ZL105双金属复合材料真空连接的研究  

A Study on Vacuum Diffusion Bonding of AZ31D/ZL105

作　　者：刘彦峰[1] 党志欢 范新会[1] LIU Yan-feng DANG Zhi-huan FAN Xin-hui(College of Chemical Engineering and Modem Materials / Shaanxi Key Laboratory of Tailings Comprehensive Utilization of Resources, Shangluo University, Shangluo 726000, Shaanx)

机构地区：[1]商洛学院化学工程与现代材料学院/陕西省尾矿资源综合利用重点实验室,陕西商洛726000

出　　处：《商洛学院学报》2017年第4期33-38,共6页Journal of Shangluo University

基　　金：陕西省大学生创新创业训练计划项目(2730);商洛学院科研基金项目(17SKY-FWDF005)

摘　　要：在真空条件下制备AZ31D/ZL105双金属复合材料,采用金相显微镜、扫描电子显微镜和显微硬度计对扩散层的组织和成分进行了分析。结果表明:加热温度为400℃,保温60 min获得的AZ31D/ZL105双金属复合材料结合区组织均匀、厚度适中,且无夹杂和孔洞等焊接缺陷;结合区形成A、B、C三个过渡层,A层主要为α-Mg树枝晶和枝晶间形成的网状β-Mg17Al12;B层由Al_3Mg_2相和富Mg的铝基固溶体及少量的β-Mg17Al12相组成;C层主要为铝基固溶体和Al_3Mg_2;随着加热温度的升高,AZ31D/ZL105结合区域的显微硬度先增大再减小,其中C层显微硬度最大、其次为B层、A层最小;最大硬度值为269.9 HV。AZ31D/ZL105 bimetallic composites were prepared in vacuum conditions. The microstructure and constituents of transition layer were characterized by optical microscope, scanning electron microscope and energy dispersive spectrometer, and the microhardness was tested as weil. The results show that the AZ31D/ZL105 bimetallic composites with good interface bonding can be achieved at 400℃ for 60 min without the presence of cracks and no fusion. The interface of the TC4/304 bimetallic composites consisted of A, B, C three transition layers. The A layer is mainly for β-Mg17A112, which formed of α-Mg dendrites and interdendritic reticular. The B layer is composed of Al3Mg2 and magnesium rich aluminum based solid solution with a little of β-Mg17Al12. The C layer is mainly of aluminum based solid solution and Al3Mg2. The microhardness of the AZ31D/ZL105 interface increases first and then decreases with increasing temperature. In addition, the microhardness of the C layer is the largest, followed by B layer and the A layer is minimum. And the peak hardness reached up to 269.9 HV.

关 键 词：AZ31D ZL105 双金属复合材料 扩散连接 

分 类 号：TB331[一般工业技术—材料科学与工程]