微量元素复合添加对Al-Si-Mn-Mg合金组织与强韧性的影响
Effect of Counpound Addition of Trace Elements on Microstructure and Strength and Toughness of Al-Si-Mn-Mg Alloy
姜心成 1李亨 1腾兴宇 2唐丽 3王东明 4吴玉程1
作者信息
- 1. 合肥工业大学材料科学与工程学院,合肥 230009
- 2. 芜湖瑞鹄汽车轻量化技术有限公司,芜湖 241000
- 3. 安庆环新集团股份有限公司,安庆 246000
- 4. 池州九华明坤铝业有限公司,池州 247100
- 折叠
摘要
为探究微量元素复合添加对Al-Si合金晶粒大小、形貌和力学性能的影响,熔炼制备了Al-8Si-0.6Mn-0.4Mg-0.15Ti-x Sc(x=0,0.2,0.4,0.5,质量分数,%,下同)合金,结合金相组织图、扫描电镜和能谱等技术手段对合金的晶粒形貌、尺寸及强韧性进行表征分析.结果表明,铸态Al-8Si-0.6Mn-0.4Mg-0.15Ti-x Sc合金的主要物相包括:α-Al基体、共晶Si相、Al3Ti、Al3Sc、AlMnTi、富Fe相等.Ti含量为0.15%的情况下,调整Sc含量为0.2%,可以获得最优的细化效果,合金平均晶粒尺寸为46 μm,抗拉强度达到221 MPa,伸长率为5.9%.
Abstract
In order to explore the influence of counpound addition of trace element on the size,morphologies and mechanical properties of Al-Si grains,Al-8Si-0.6Mn-0.4Mg-0.15Ti-x Sc(x=0,0.2,0.4,0.5,%)alloys were prepared by melting-casting,and the morphology,size,strength and tonghness of alloys were characterized and ana-lyzed by metallographic structure diagram,scanning electron microscopy,and energy spectrum.The results indicate that the main phase of as-cast Al-8Si-0.6Mn-0.4Mg-0.15Ti-x Sc alloy includes α-Al matrix,eutectic Si phase,Al3Ti,Al3Sc,AlMnTi,and Fe-rich phase.When the Ti content is 0.15%,alloy with the desirable grain refine-ment effect can be obtained by adjusting the Sc content to 0.2%,where the average grain size is 46 μm,tensile strength reaches 221 MPa,and elongation is 5.9%.
关键词
Al-Si合金/微观组织/复合添加/力学性能Key words
Al-Si Alloy/Microstructure/Compound Addition/Mechanical Properties引用本文复制引用
基金项目
安徽省发改委创新工程资助项目(JZ2022AFKJ0032)
中央高校基本科研业务费专项资金资助项目(JZ2021HGTB0100)
合肥市科技重大专项资助项目(2022-SZD-0029)
出版年
2024
NETL
NSTL
维普
万方数据