金属热处理 ›› 2025, Vol. 50 ›› Issue (8): 71-75.DOI: 10.13251/j.issn.0254-6051.2025.08.012

• 材料研究 • 上一篇    下一篇

微量B对6101铝合金组织与性能的影响

黄惠毅1, 乐永康1, 李飞龙1,2, 廖斌1, 吴烔3   

  1. 1.南南铝业股份有限公司, 广西 南宁 530200;
    2.广西交通职业技术学院, 广西 南宁 530216;
    3.曼彻斯特大学 自然科学学院, 曼彻斯特 M139PL
  • 收稿日期:2025-03-02 修回日期:2025-05-25 出版日期:2025-08-25 发布日期:2025-09-10
  • 通讯作者: 李飞龙,高级工程师,硕士,E-mail:124660436@qq.com
  • 作者简介:黄惠毅(1992—),男,工程师,硕士,主要研究方向为铝合金应用技术,E-mail:hhyi637@163.com。
  • 基金资助:
    南宁市“邕江计划”青年人才项目(RC20240204);南宁市创新创业领军人才“邕江计划”项目(2020001)

Effect of trace B on microstructure and properties of 6101 aluminum alloy

Huang Huiyi1, Le Yongkang1, Li Feilong1,2, Liao Bin1, Wu Tong3   

  1. 1. Alnan Aluminium Co., Ltd., Nanning Guangxi 530200, China;
    2. Guangxi Transport Vocational and Technical College, Nanning Guangxi 530216, China;
    3. School of Natural Sciences, University of Manchester, Manchester M139PL, UK
  • Received:2025-03-02 Revised:2025-05-25 Online:2025-08-25 Published:2025-09-10

摘要: 利用金相显微镜、扫描电镜、EDS分析、拉伸试验和导电率检测,研究了不同B含量6101铝合金的组织及性能。结果表明,随着B含量增加,铸态6101铝合金组织逐渐粗化。当B添加量达到0.018%时,晶粒长大更加明显且有取向性,甚至出现了羽毛状组织,且组织中有黑色夹渣物存在。适量B有利于提高6101合金挤压型材的导电性和强度。当B添加量为0.009%时,合金的综合性能最优,抗拉强度和屈服强度分别为210.2 MPa和177.5 MPa,导电率为58.8%IACS,满足6101铝合金导电排材导电率≥56%IACS,Rm≥185 MPa,Rp0.2≥150 MPa的性能要求。

关键词: 微量元素B, 6101铝合金, 强度, 导电性, 组织

Abstract: Microstructure and properties of 6101 aluminum alloys with different B contents were studied by means of optical microscope, scanning electron microscope, EDS analysis, tensile test, electrical conductivity detection. The results show that with the increase of B content, the as-cast microstructure of the 6101 aluminum alloy gradually coarsens. When the B addition amount reaches 0.018%, the grain growth becomes more obvious and oriented, even feather-like structures appear, and black slag inclusions exist in the microstructure. An appropriate amount of B element is beneficial to improving the electrical conductivity and strength of the 6101 alloy extruded profile. When the B addition amount is 0.009%, the comprehensive properties of the alloy are optimal. The tensile strength and yield strength are 210.2 MPa and 177.5 MPa, respectively, and the electrical conductivity is 58.8%IACS, meeting the requirements of the 6101 aluminum alloy conductive busbars: electrical conductivity ≥56%IACS, Rm≥185 MPa, and Rp0.2≥150 MPa.

Key words: trace element B, 6101 aluminum alloy, strength, conductivity, microstructure

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