挤压比对6063铝合金棒材组织性能的影响  

Effect of extrusion ratio on microstructure and mechanical properties of 6063 aluminum alloy rod

作　　者：曹耿华 余珠华 张大童[2] 宁成云[2] 朱世安 项胜前 CAO Geng-hua;YU Zhu-hua;ZHANG Da-tong;NING Cheng-yun;ZHU shi-an;XIANG Sheng-qian(Guangdong Haomei New Materials Co.,Ld.,Qingyuan 511540,China;South China University of Technology,Guangzchou 510640,China;School of Automotive&Transportation Engineering,Shenchen Polytechnic,Shenzhen 518055,China)

机构地区：[1]广东豪美新材股份有限公司,广东清远511540 [2]华南理工大学,广东广州510640 [3]深圳职业技术学院汽车与交通学院,广东深圳518055

出　　处：《轻合金加工技术》2022年第7期37-41,共5页Light Alloy Fabrication Technology

基　　金：广东省重点领域研发计划项目(2020B010186002);深圳职业技术学院校级科研启动项目(6022312011K)。

摘　　要：在坏料尺寸、铸锭加热温度、挤压速度不变的情况下,分析了不同挤压比对6063铝合金组织和力学性能的影响。结果表明:合金在挤压过程中发生动态再结晶,在大挤压比条件下,组织由等轴再结晶晶粒组成,且形成了强度较大的<100>丝织构。合金的力学性能随着挤压比的增大而提高,当挤压比为156时,合金的抗拉强度和伸长率达到最大值,分别为228MPa和26.9%,断口组织由大量等轴韧窝组成,断裂机制由铸态下的脆性断裂转变为韧性断裂。The microstructure and mechanical properties of 6063 aluminum alloy were analyzed with different extrusion ratios and fixed billet size,ingot heating temperature and extrusion speed The results show that dynamic recrystallization takes place during the extrusion process Under the condition of large extrusion ratio,the microstructure is composed of equiaxed recrystallized grains,and a<100>texture with high strength is formed.The mechanical properties of the alloy increase with the increase of extrusion ratio.When the extrusion ratio is 156,the tensile strength and elongation of the alloy reach the maximum,which are 228 MPa and 26.9%respectively The fracture structure is composed of a large number of equiaxed dimples,and the fracture mechanism changes from brittle fracture to ductile fraci ture.

关 键 词：6063铝合金 挤压比 热挤压成型 微观组织 力学性能 

分 类 号：TG379[金属学及工艺—金属压力加工]