退火温度对Mg/Al轧制复合层组织和性能影响  

Effect of annealing temperature on microstructure and properties of Mg/Al rolle-bonding layer

作　　者：张鹏 丁云龙 马雨寒 应骏[1,2] 韩冰 ZHANG Peng;DING Yunlong;MA Yuhan;YING Jun;HAN Bing(School of Mechanical Engineering and Automation,University of Science and Technology Liaoning,Anshan 114051,China;Liaoning Key Laboratory of Special Machining for Complex Work Piece Surface,Anshan 114051,China;Shandong TaiKai Discnnector CO.,LTD.,Tai An 271000,China)

机构地区：[1]辽宁科技大学机械工程与自动化学院,辽宁鞍山114051 [2]辽宁省复杂工件表面特种加工重点实验室,辽宁鞍山114051 [3]山东泰开隔离开关有限公司,山东泰安271000

出　　处：《有色设备》2024年第3期37-44,共8页Nonferrous Metallurgical Equipment

基　　金：国家自然科学基金资助项目(51775258);辽宁省科技厅博士启动经费(2021-BS-241)。

摘　　要：采用扫描电镜(SEM)、光学显微镜(OM)、拉伸实验机、X射线衍射仪(XRD)等研究了退火温度(220~380℃)对MgAZ31和Al(1A99)轧制复合层的微观组织结构、力学性能、拉伸断口的形貌及物相成分影响。结果表明:随着退火温度的升高,镁、铝原子逐渐进行扩散迁移,扩散层厚度增加,从220℃时的1.80μm逐渐增加到380℃时的45.10μm,且扩散层的生长速率逐渐增大;当退火温度达到300℃时,断口处出现密集的韧窝,镁基体的断裂形式向塑性断裂转变,镁基体的塑性增强,断口的物相为Mg_(2)Al_(3)相,抗拉强度达到最大,为272.35 MPa,此时试件的综合力学性能达到最佳,故300℃为最佳退火温度。The effects of annealing temperature(220~380℃)on microstructure,mechanical properties,tensile fracture morphology and phase composition of MgAZ31 and Al(1A99)rolle-bonding layers were studied by scanning electron microscopy(SEM),optical microscopy(OM),tensile testing machine and X-ray diffraction(XRD).The results show that with the increase of annealing temperatures,magnesium and aluminum atoms gradually diffuse and migrate,and the thickness of diffusion layer increases,from 1.80μm at 220℃to 45.10μm at 380℃,the growth rate of diffusion layer increases gradually.When the annealing temperature reaches 300℃,dense dimples appear at the fracture,and the fracture type of magnesium matrix changes to plastic fracture.The plasticity of the magnesium matrix is enhanced.The phase at the fracture surface is Mg_(2)Al_(3)phase,and the tensile strength reaches a maximum of 272.35 MPa,At this time,the comprehensive mechanical properties of the specimen reach the best,therefore,300℃is the best annealing temperature.

关 键 词：退火温度 轧制复合层 扩散 微观组织 力学性能 镁铝复合材料 

分 类 号：TG113.12[金属学及工艺—物理冶金]