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材料导报  2023, Vol. 37 Issue (1): 21080231-6    https://doi.org/10.11896/cldb.21080231
  金属与金属基复合材料 |
Sm对SAl 4043铝合金焊丝的组织、性能及氢含量的影响
黄智恒1, 薛松柏1,*, 王博2, 张帆1, 龙伟民2
1 南京航空航天大学材料科学与技术学院,南京 210016
2 中机智能装备创新研究院(宁波)有限公司,浙江 宁波 315700
Effect of Sm on Microstructure, Properties and Hydrogen Content of SAl 4043 Aluminum Alloy Welding Wire
HUANG Zhiheng1, XUE Songbai1,*, WANG Bo2, ZHANG Fan1, LONG Weimin2
1 College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2 China Innovation Academy of Intelligent Equipment (Ningbo) Co., Ltd., Ningbo 315700, Zhejiang, China
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摘要 本工作研究了Sm对SAl 4043铝合金焊丝组织、性能及氢含量的影响。结果表明,Sm的添加不仅能细化α-Al基体,使粗大的柱状晶细化为等轴晶,还能对共晶硅起到变质作用,使共晶硅形貌由粗大的层片状或长针状转变为短棒状和颗粒状,并弥散分布于晶界处。由于Sm元素的晶粒细化作用和对共晶硅的变质作用,Sm含量为0.4%(质量分数,下同)的铸态合金的抗拉强度和延伸率分别为140 MPa、8.5%,与未添加Sm的SAl 4043铝合金焊丝相比提高了25%、49%。同时,加入适量的Sm可以使铸态合金焊丝中的氢含量降低至0.15 mL/100 g Al,与未添加Sm的合金焊丝相比,氢含量降低59%;焊接接头拉伸试验结果表明,合金焊丝中适量Sm的加入可以改善接头力学性能,并降低焊缝气孔率,当Sm含量为0.4%时,焊接接头力学性能最好,抗拉强度和延伸率分别为180.4 MPa、10.20%,焊缝气孔率仅为0.16%,与未添加Sm的焊丝所得接头相比,焊缝气孔率降低71%。
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黄智恒
薛松柏
王博
张帆
龙伟民
关键词:  稀土钐  SAl 4043铝合金焊丝  显微组织  力学性能    
Abstract: The effect of Sm element on the microstructure, properties and hydrogen content of SAl4043 aluminum alloy welding wire was studied. The results show that the addition of Sm can refine the α-Al matrix and modify the eutectic silicon, the short-rod like and granular eutectic silicon are dispersedly distributed at the grain boundaries. The addition of Sm significantly improves the mechanical properties of the as-cast welding wire alloy because of the grain refinement and modiffication effect of Sm element. When 0.4wt% Sm is added, the alloy’s tensile strength reaches 140 MPa, and the elongation is 8.5%, which is 25% and 49% higher than that when no Sm is added. At the same time, the addition of Sm can significantly reduce the hydrogen content of the as-cast welding wire alloy, the minimum content reaches 0.15 mL/100 g Al when 0.4wt% Sm is added, compared with the alloy welding wire without Sm, the hydrogen content is reduced by 59%. The joint test indicates that the addition of Sm to the welding wire improves the mechanical properties and bending performance by reducing the weld porosity. When the content of Sm is 0.4wt%, the tensile strength and elongation reached 180.4 MPa and 10.2% respectively. At the same time, compared with that of Sm free one, the porosity of the weld is significantly reduced by 71%, only 0.16%.
Key words:  samarium    SAl 4043 aluminum alloy welding wire    microstructure    mechanical property
出版日期:  2023-01-10      发布日期:  2023-01-31
ZTFLH:  TG422.3  
基金资助: 国家自然科学基金(51975284)
通讯作者:  * 薛松柏,1981年12月获湖南大学理学学士学位;1987年5月获上海交通大学工学硕士学位;2002年4月获哈尔滨工业大学材料加工工程学科工学博士学位;现任南京航空航天大学材料科学与技术学院二级教授、研究员、博士研究生研导师。主要研究先进连接技术、微电子组装与封装、焊接新工艺与新装备、焊接新材料设计与制备等。在国内外学术刊物上发表论文410余篇,SCI收录220余篇,EI收录160余篇,主持制定了五项国家标准、五项机械工业部行业标准并发布实施;获得国家科技进步奖二等奖2项。xuesb@nuaa.edu.cn   
作者简介:  黄智恒,2019年6月毕业于沈阳航空航天大学,获得工学学士学位。现为南京航空航天大学材料科学与技术学院硕士研究生,在薛松柏教授的指导下进行研究。目前主要从事先进连接技术方面的工作。
引用本文:    
黄智恒, 薛松柏, 王博, 张帆, 龙伟民. Sm对SAl 4043铝合金焊丝的组织、性能及氢含量的影响[J]. 材料导报, 2023, 37(1): 21080231-6.
HUANG Zhiheng, XUE Songbai, WANG Bo, ZHANG Fan, LONG Weimin. Effect of Sm on Microstructure, Properties and Hydrogen Content of SAl 4043 Aluminum Alloy Welding Wire. Materials Reports, 2023, 37(1): 21080231-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21080231  或          http://www.mater-rep.com/CN/Y2023/V37/I1/21080231
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