热处理对Al-25wt.%Mg_(2)Si-1.0wt.%La复合材料组织演变和力学性能的影响  

Effect of Heat Treatment on Microstructure Evolution and Mechanical Properties of Al-25wt.%Mg_(2) Si-1.0wt.%La Composites

作　　者：任玉艳 张鑫 马鸣檀 刘桐宇[3] 李英民[3] 刘伟华[3] REN Yu-yan;ZHANG Xin;MA Ming-tan;LIU Tong-yu;LI Ying-min;LIU Wei-hua(Faculty of Electromechanical Information,WeifangUniversity of Science and Technology,Shouguang 262700,Shandong,China;Weifang key laboratory of high-temperature materials and single crystal components fabrication technology for advanced engine system,Shouguang 262700,Shandong,China;School of Material Science and Engineering,Shenyang University of Technology,Shenyang 110870,Liaoning,China)

机构地区：[1]潍坊科技学院机电信息学部,山东寿光262700 [2]潍坊市先进动力系统用热端材料及单晶部件制备重点实验室,山东寿光262700 [3]沈阳工业大学材料科学与工程学院,辽宁沈阳110870

出　　处：《铸造》2022年第5期598-603,共6页Foundry

基　　金：寿光市科技计划项目(2019JH14);潍坊市科技计划项目(2021GX052)。

摘　　要：研究了原位自生Al-25wt.%Mg_(2)Si-1.0wt.%La复合材料的组织和性能,但形成的Mg_(2)Si初生相组织粗大,呈尖角状,降低了材料的力学性能,故采用了热处理方法改善其组织和性能。试验结果表明,热处理可以改善Al-25wt.%Mg_(2)Si-1.0wt.%La复合材料的微观组织和力学性能,当固溶温度为(545±5)℃,保温时间为12 h,时效温度为(175±5)℃,保温时间为7 h时,Mg_(2)Si初生相组织较细小、圆润、分布均匀,此时的力学性能也最佳,抗拉强度为210.7 MPa,伸长率3.83%,硬度为HB134.2。The microstructure and properties of in-situ Al-25wt.%Mg_(2)Si-1.0wt.%La composite were studied in this paper,but the Mg_(2)Si primary phase microstructure was coarse and sharp,which reduced the mechanical properties.In order to improve the microstructure and the mechanical properties,a heat treatment method was used.The results showed that heat treatment improved the microstructure and mechanical properties of the Al-25wt.%Mg_(2)Si-1.0wt.%La composites.When the solution temperature was(545±5)℃,the solution time was12 h,and the aging temperature was(175±5)℃and the aging time was 7 h,the microstructure of the Mg_(2)Si primary phase was finer,more rounded,and evenly distributed,and the mechanical properties were also the best.The best mechanical properties were that the tensile strength was 210.7 MPa,elongation was 3.83%,and hardness was HB134.2.

关 键 词：Al-25wt.%Mg_(2)Si-1.0wt.%La复合材料 热处理 微观组织 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]