合金成分和挤压工艺对5A02合金棒材组织和力学性能的影响  

Effect of Alloy Composition and Extrusion Process on Microstructure and Mechanical Properties of 5A02 Alloy Bar

作　　者：周志军 林顺岩 ZHOU Zhi-jun;LIN Shun-yan(Southwest Aluminum (Group) Co.,Ltd.,Chongqing 401326,China)

机构地区：[1]西南铝业(集团)有限责任公司,重庆401326

出　　处：《铝加工》2019年第1期17-20,共4页Aluminium Fabrication

摘　　要：研究了复合添加微量元素Zr和Er对5A02合金棒材组织及力学性能的影响,优化制定了合金的化学成分及挤压工艺。试验结果表明,添加的主合金元素Mg、Mn含量在标准范围的中低限,可将合金挤压棒材R状态的抗拉强度控制在225MPa以下;复合添加微量元素Zr和Er,能够明显降低5A02合金挤压棒材的粗晶环深度;优化制定的挤压工艺,可显著提高生产效率。The effects of adding trace elements Zr and Er on the microstructure and mechanical properties of 5A02 alloy bar were studied. The chemical composition and extrusion process of the alloy were optimized.The test results show that the tensile strength of the R state of the alloy extrusion bar can be controlled below 225 MPa when the contents of Mg and Mn added are middle and low limits in the standard range;the combined addition of Zr and Er trace elements can obviously reduce the depth of coarse crystal ring of 5A02 alloy extruded bar;and the production efficiency can be greatly improved by optimizing the extrusion process.

关 键 词：5A02 合金 挤压粗晶环 微合金化 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG397[金属学及工艺—金属材料]