流变压铸Al-15Cu合金的组织与力学性能  

Microstructure and Mechanical Properties of the Rheo-diecast Al-15Cu Alloy

作　　者：赵君文[1] 王海波[1] 杨涛 韩靖[1] 郑云志 何振波 ZHAO Junwen;WANG Haibo;YANG Tao;HAN Jing;ZHENG Yunzhi;HE Zhenbo(Key Lab of Advanced Technologies of Materials(Ministry of Education),School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu,610031;Shandong Advanced Aluminum Community Management and Operation Co.,Ltd.,Binzhou 256603;Hangqiao New Material(Binzhou)Science Technology Ltd.,Binzhou 256606)

机构地区：[1]西南交通大学材料科学与工程学院材料先进技术教育部重点实验室,成都610031 [2]山东省高端铝共同体管理运营有限公司,滨州256603 [3]航桥新材料科技(滨州)有限公司,滨州256606

出　　处：《铸造技术》2024年第5期459-465,共7页Foundry Technology

基　　金：四川省科技计划重点研发项目(2023YFG0195,2023YFG0234);山东省应用创新创业共同体项目(BZGDL-XM-2022-03)。

摘　　要：Al-Cu合金因其高的强度、硬度及高温力学性能,在交通领域具有重要应用。为探明高Cu含量铝合金力学性能特点,本文采用流变压铸成形Al-15Cu合金,研究浇注温度等参数对该合金流变压铸件力学性能的影响。结果表明,随着浇注温度的增加,初生α-Al晶粒平均等效直径由55μm降低到30μm,而平均形状系数随浇注温度变化不明显;施加电磁搅拌对初生α-Al晶粒有一定的细化作用。Al-15Cu合金流变压铸件的强度和塑性随浇注温度先增加后降低。浇注温度为610℃和施加电磁搅拌条件下的拉伸试样密度、抗拉强度和伸长率最高,分别为2.961 g/cm~3、260 MPa和2%。在300℃拉伸条件下,流变铸件性能随浇注温度变化的规律与常温时一致,抗拉强度和伸长率分别可达118 MPa和8%。Al-Cu alloys have important applications in the transportation field due to their high strength,hardness,and high-temperature mechanical properties.To clarify the mechanical characteristics of Al alloy with high Cu content,rheo-diecast Al-15Cu alloy was investigated to determine the influence of factors such as pouring temperature on the mechanical properties of rheo-diecast parts.The results show that with increasing casting temperature,the average equivalent diameter of the primary α-Al grains decreases from 55μm to 30μm,while no apparent change is shown in the average shape factor with respect to the casting temperature.The application of electromagnetic stirring has some effect on the refinement of the primaryα-Al grains.The strength and elongation of the rheo-diecast Al-15Cu alloy parts increase and then decrease with increasing casting temperature.The density,tensile strength and elongation of the tensile specimens with a pouring temperature of 610℃ and electromagnetic stirring reach the highest values,which are 2.961 g/cm3,260 MPa and 2%,respectively.At 300℃,the variation in the tensile properties of the rheo-diecast alloy with increasing pouring temperature is consistent with that at room temperature,and the highest tensile strength and elongation reach 118 MPa and 8%,respectively.

关 键 词：Al-15Cu 流变压铸 组织 高温力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]