复合添加Zr、Sc对AlFeSi合金铸态组织和力学性能的影响  

Effects of Compound Addition of Zr and Sc on Cast Microstructure and Mechanical Properties of AlFeSi Alloys

作　　者：王豹 姜凤阳 王俊勃 许鸿捷 思芳 杨敏鸽 刘江南 WANG Bao;JIANG Fengyang;WANG Junbo;XU Hongjie;SI Fang;YANG Minge;LIU Jiangnan(School of Materials Science and Engineering,Xi'an Polytechnic University,Xi'an 710048,China;Shishi Huixing Machinery Co.,Ltd.,Shishi 362700,China)

机构地区：[1]西安工程大学材料工程学院,陕西西安710048 [2]石狮市汇星机械有限公司,福建石狮362700

出　　处：《热加工工艺》2025年第3期103-108,共6页Hot Working Technology

基　　金：西安市重大科技成果转化及产业化项目(20GXSF0010)。

摘　　要：利用井式电阻炉制备不同Zr、Sc含量的AlFeSi合金,采用万能试验机、扫描电镜和X射线衍射仪等研究了微量稀土元素Zr、Sc对铸态AlFeSi合金力学性能以及微观组织的影响。结果表明,当Zr、Sc复合添加且质量分数各为0.2wt%时,合金的抗拉强度、硬度以及晶粒被细化效果最佳,抗拉强度、硬度分别为171.55 MPa、75.58 HV,晶粒尺寸为45.78μm。添加微量元素的Sc、Zr可以产生初生的第二相Al_(3)(Sc,Zr)颗粒,在凝固的过程中充当异质形核核心,促使AlFeSi合金液体发生非均质形核,从而细化AlFeSi合金晶粒。AlFeSi alloys with different contents of Zr and Sc were prepared by a well resistance furnace.The effects of trace rare earth elements Zr and Sc on the mechanical properties and microstructure of as-cast AlFeSi alloys were investigated by universal testing machine,scanning electron microscope and X-ray diffractometer.The results show that the best tensile strength,hardness and grain size are 171.55 MPa,75.58 HV and 45.78μm,respectively,when Zr and Sc are added together and the mass fraction is 0.2wt%.The second phase Al_(3)(Sc,Zr)particles can be formed after adding trace elements of Sc and Zr,which acts as the heterogeneous nucleation core during the solidification process and promote the heterogeneous nucleation of AlFeSi alloy liquid,thus refining the AlFeSi alloy grains.

关 键 词：复合添加 AlFeSi合金 微观组织 力学性能 Al_(3)(Sc Zr)颗粒 

分 类 号：TG292[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]