Sb对Al-20Si合金组织和性能的影响  

Effects of Sb on Microstructure and Properties of Al-20Si Alloys

作　　者：唐鹏 刘倩男[1] 韩振尧 蔡义明 TANG Peng;LIU Qiannan;HAN Zhenyao;CAI Yiming(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology,Guangxi University,Nanning 530004,China;Guangxi Alnan Institute of Aerospace Transit Aluminum Alloy and Application,Nanning 530031,China;School of Electrical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]广西大学广西石化资源加工及过程强化技术重点实验室,广西南宁530003 [3]广西南南铝航空交通铝合金新材料与应用研究院,广西南宁530031 [4]广西大学电气工程学院,广西南宁530004

出　　处：《热加工工艺》2024年第8期87-92,共6页Hot Working Technology

基　　金：中国博士后科学基金项目(2021M693800);广西石化资源加工与过程强化技术重点实验室开放项目(2022K005);广西重点研发计划项目(桂科AB22035033)。

摘　　要：研究了添加不同含量的微量元素Sb后,Al-20Si合金微观组织和力学性能的变化。通过金相显微镜(OM)、扫描电镜(SEM)、能谱(EDS)、X射线衍射仪(XRD)表征了该合金的微观结构,分析其拉伸行为和断裂机制。结果表明,随着Sb元素的添加,对Al-20Si合金中初晶硅产生变质效果,使初晶硅形貌和尺寸产生明显变化,AlSb作为异质核心,使初晶硅数量增加,拉伸性能得到明显改善。当Sb添加量达到0.8%时,初晶硅尺寸达到最小,同时合金具有较好的综合力学性能,其抗拉强度、伸长率分别从未变质的93.2 MPa和0.77%提高到154.1 MPa和1.97%,分别提高了65.34%和155.84%。The changes of the microstructure and properties of Al-20Si alloy after adding different content of Sb element were studied.The microstructure of the alloy was characterized by metallographic and differential scanning electron microscopy,and its tensile behavior and fracture mechanism were analyzed.The results show that with the addition of Sb element,the primary silicon in Al-20Si alloy has a metamorphic effect,which can cause the shape and size of the primary silicon change significantly.AlSb is acted as a heterogeneous core.The amount of the crystalline silicon increases and the tensile properties significantly improve.When Sb content reaches 0.8%,the size of primary silicon reaches the minimum,and the alloy has good comprehensive mechanical properties.The tensile strength and elongation of primary silicon increase from 93.2 MPa and 0.77%to 154.1 MPa and 1.97%without modification,increase by 65.34%and 155.84%,respectively.

关 键 词：AL-20SI 初晶硅 SB 拉伸性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]