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,R m≥185 MPa,R p0.2≥150 MPa的性能要求。
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,R m≥185 MPa,and R p0.2≥150 MPa.
作者
黄惠毅
乐永康
李飞龙
廖斌
吴烔
Huang Huiyi;Le Yongkang;Li Feilong;Liao Bin;Wu Tong(Alnan Aluminium Co.,Ltd.,Nanning Guangxi 530200,China;Guangxi Transport Vocational and Technical College,Nanning Guangxi 530216,China;School of Natural Sciences,University of Manchester,Manchester M139PL,UK)
出处
《金属热处理》
北大核心
2025年第8期71-75,共5页
Heat Treatment of Metals
基金
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)。
关键词
微量元素B
6101铝合金
强度
导电性
组织
trace element B
6101 aluminum alloy
strength
conductivity
microstructure
