赵任,张松利,代旭中

• 1:江苏大学材料科学与工程学院

摘要(Abstract)：

采用Al-K_2TiF_6-K_2ZrF_6-KBF_4反应体系成功制备了(ZrB_2+TiB_2)颗粒含量为3 mass%的(ZrB_2+TiB_2)/Al-4.5Cu铝基复合材料，研究了热处理对复合材料微观组织和力学性能的影响，并分析了相关机理。结果表明：固溶处理(530℃×4 h)后，复合材料的基体晶粒平均尺寸由68.0μm增大至77.8μm,抗拉强度由铸态的210.4 MPa提高到246.7 MPa,增长了17.3%,伸长率由6.7%下降至4.0%,下降了40.0%。T6(530℃×4 h+180℃×8 h)处理后，复合材料中Al_2Cu相的尺寸从11.9μm减小到10.6μm,形貌由粗大条状转变成圆球状，颗粒多数仍分布在晶界处，少数分布在晶内，复合材料基体晶粒平均尺寸由68.0μm增大至81.1μm,晶粒形貌变为等轴晶，抗拉强度由铸态的210.4 MPa提高到270.1 MPa,提高了28.6%,伸长率由6.7%上升至8.9%,提高了32.8%。

关键词(KeyWords)： Al-4.5Cu合金;原位(ZrB_2+TiB_2)颗粒;热处理;强化机制

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 赵任,张松利,代旭中

DOI: 10.13289/j.issn.1009-6264.2024-0124

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