Advanced Search
GE Jiaqi, WANG Kehong, ZHOU Qi, ZHANG Deku. Study on CMT welding-brazing joint microstructure of 7A52 Al alloy-steel stud and influence of Ni coating[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 24-28.
Citation: GE Jiaqi, WANG Kehong, ZHOU Qi, ZHANG Deku. Study on CMT welding-brazing joint microstructure of 7A52 Al alloy-steel stud and influence of Ni coating[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(4): 24-28.
shu

Study on CMT welding-brazing joint microstructure of 7A52 Al alloy-steel stud and influence of Ni coating

  • School of Material Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

More Information
  • Received Date: May 26, 2015
    Graphical Abstract
    • Abstract
  • Q235 steel studs and 7A52 aluminum alloy were joined by cold metal transfer (CMT) welding method with Al-Si alloy wire (ER4043) as the filler metal. Good weld forming with stable welding process was obtained under the welding current of 115~135 A, arc voltage of 14.5~16.5 V, welding speed of 0.3 m/min. The microstructure of the joint was studied by means of scanning electron microscope (SEM) and energy dispersive x-ray (EDX). The results showed that fusion welding interface was formed in the 7A52 aluminum alloy fusion zone, and reaction layer was formed in the steel stud fusion zone which grew thinner from the root toe area to weld toe. The reaction layer was composed of Fe2Al5 near the steel stud and FeAl3 near the weld metal. Nickel-rich zone was formed in the weld toe area of the fillet weld, which was composed by eutectic structures of Al and Al3Ni, and a small amount of Al3Ni2. Comparing with the microstructure and mechanical properties of joints without Ni coating, the results showed that the properties of Ni coating during the welding process decreased the thickness of reaction layer and the brittleness of the joint. The highest shearing strength was 146.9 MPa, rising by 15%~19% as compared with joints without Ni coating, which had met the requirements of high strength Al alloy stud welding.
    • FullText(HTML)
    • References (7)
  • 吴圣川, 周鑫淼, 张卫华, 等. 激光-电弧复合焊接7075-T6铝合金裂纹扩展分析[J]. 焊接学报, 2013, 34(2):5-8. Wu Shengchuan, Zhou Xinmiao, Zhang Weihua, et al. Fatigue life prediction of laser-MIG hybrid welded 7075-T6 Al alloy joints[J]. Transactions of the China Welding Institution, 2013, 34(2):5-8.
    Deschamps A, Ringeval S, Texier G, et al. Quantitative characterization of the microstructure of an electron-beam welded medium strength Al-Zn-Mg alloy[J]. Materials Science and Engineering A, 2009, 517:361-368.
    余进, 王克鸿, 徐越兰. 7A52铝合金双丝焊接头的组织与性能[J]. 焊接学报, 2005, 26(10):87-89. Yu Jin, Wang Kehong, Xu Yuelan. Microstructures and properties of 7A52 aluminum alloy welded joint by twin wire welding[J]. Transactions of the China Welding Institution, 2005, 26(10):87-89.
    梅丛富. 附座复合热源焊接方法与原理试验样机的研究[D]. 南京:南京理工大学, 2007.
    薛鹏飞. 螺柱与中厚高强钢复合热源螺柱焊试验研究[D]. 南京:南京理工大学, 2008.
    路浩. 铝合金厚板CMT补焊工艺试验[J]. 焊接学报, 2015, 36(5):81-84. Lu Hao. Repair welding experiment by CMT welding technology for thick aluminum alloy plate[J]. Transactions of the China Welding Institution, 2015, 36(5):81-84.
    李茂华, 侯建国. 国内外钢结构设计规范关于角焊缝的限值及计算方法比较[J]. 钢结构, 2005, 20(77):65-67. Li Maohua, Hou Jianguo. Comparatively study on limitations and calculating methods of fillet welds in the criteria of steel structure design both at home and abroad[J]. Steel Construction, 2005, 20(77):65-67.
    • Related Articles

  • Related Articles

    [1]LIANG Hui, LI Pan, SHEN Xin, CHEN Lifan, DAI Junhui, LI Dong, YANG Dongqing. Finite element analysis of the effect of ultrasonic impact on the stress of aluminum alloy arc additive manufacturing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2023, 44(10): 79-85, 119. DOI: 10.12073/j.hjxb.20230304003
    [2]WANG Shang, TIAN Yanhong, HAN Chun, LIU YangZhi. Effect of temperature distribution of CBGA components on fatigue life of solder joint by FEA[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(11): 113-118.
    [3]LIU Lu, WANG Ping, LIU Yong, MA Ran. Research on residual distortion of welded tubular structure based on FEA[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(10): 113-116.
    [4]MI Gaoyang, WEI Yanhong, ZHAN Xiaohong, GU Cheng. A study of automatically transitional meshing approach for finite element method during butt welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(5): 44-46,88.
    [5]WANG Hongfeng, WANG Jianli, ZUO Dunwen, SONG Weiwei, DUAN Xinglin. Finite element analysis on friction stir welding of aviation aluminum alloy plate[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(5): 21-25.
    [6]CHEN Yongxiong, LIANG Xiubing, SHANG Junchao, XU Binshi. Analysis of FEA of residual stress for thermal sprayed coating on shaft parts[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (6): 13-16.
    [7]YANG Iinjuan, SHEN Shiming. Finite element analysis of residual stress of welding repair for gas pipeline[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2008, (12): 77-80.
    [8]GAO Jiashuang, YANG Jianguo, FANG Hongyuan, SHI Wenyong, SHANG Haibo. FEA preprocessing system of welding analysis based on VRML[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2008, (4): 93-96.
    [9]ZHANG Mingxian, WU Chuansong, LI Kehai, ZHANG Yuming. FEA based prediction of weld dimension in new DE-GMAW process[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (2): 33-37.
    [10]ZHU Liang, CHEN Jian-hang. Characteristics of stress distribution and prediction of strength inheat-affected zone softened welded joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2004, (3): 48-51.

Catalog

    Get Citation
    PDF
    XML
    Article views (787) PDF downloads (574) Cited by()
    Turn off MathJax
    Article Contents
    Abstract
    References
    Related Articles

    Website Copyright © Editorial Office of Transactions of the China Welding Institution, Welding Journals Publishing HouseTel：0451-86323218Address：No. 2077, Chuangxin Road, Songbei District, Harbin

    Supported by: Beijing Renhe Information Technology Co. Ltd    Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return