摘要
采用光学显微镜、扫描电镜、硬度测试、拉伸测试等方法研究了Mn元素对Al-0.91Mg-0.81Si-1.02Cu-xMn-0.2Zr-0.02Sr铝合金热压材组织与性能的影响。结果表明:增加Mn元素含量在显著细化合金晶粒的同时会降低合金晶粒的等轴度。当Mn元素含量达0.7%时,若再加入Mn元素,合金晶粒尺寸的变化不大,但合金的抗拉强度会降低。Mn元素会大幅提高合金的抗晶间腐蚀能力。综合考虑Mn元素对合金抗拉性能、晶粒尺寸和抗晶间腐蚀性能的影响,在合金中加入0.7%左右的Mn元素较为合理。
The effects of Mn on the microstructure and properties of Al-0.91Mg-0.81Si-1.02Cu-xMn-0.2Zr-0.02Sr aluminum alloy were investigated by optical microscopy,scanning electron microscopy,hardness test and tensile test.The results show that the increase of the Mn element content reduces the equiaxedness of the alloy grains while significantly refines the alloy grains.When the content of added Mn is 0.7%,the grain size of the alloy does not change much with further addition of Mn,but the tensile strength of the alloy decreases.Mn element can greatly improve the resistance of the alloy to intergranular corrosion.Considering the effect of Mn element on the tensile properties,grain size and intergranular corrosion resistance of the alloy,it is reasonable to add about 0.7%Mn to the alloy.
作者
陈汉辉
陈瑞芳
许晓静
王天伦
张劲松
张可人
黄鹏
范佳丽
CHEN Hanhui;CHEN Ruifang;XU Xiaojing;WANG Tianlun;ZHANG Jinsong;ZHANG Keren;HUANG Peng;FAN Jiali(Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Zhenjiang 212013,China)
出处
《热加工工艺》
北大核心
2022年第20期43-45,共3页
Hot Working Technology
基金
江苏大学优秀青年学者专项基金项目(1211110001)
江苏省科研创新项目(CXLX110563)
江苏省普通高校研究生创新项目(CXLX12_0620)。
关键词
6000系铝合金
显微组织
力学性能
抗晶间腐蚀性能
6000 series aluminum alloy
microstructure
mechanical properties
intergranular corrosion resistance
