硬质合金/因瓦合金激光-氩弧复合焊缝界面的显微组织与元素扩散
Microstructure and Element Diffusion of Welded Seam Interface during Laser-Arc Hybrid Welding of Cemented Carbide and Invar Alloy
摘 要
采用激光-氩弧复合焊接技术实现了硬质合金与因瓦合金的焊接, 采用扫描电镜、能谱仪以及电子探针等研究了焊缝界面的显微组织、化学成分和元素扩散情况。结果表明: 激光和氩弧双热源的作用消除了焊缝界面硬质合金侧的η相, 同时在因瓦合金侧形成Fe4WC2枝晶; 焊缝硬质合金侧的界面元素扩散系数远高于单独使用氩弧焊焊接条件下的, 镍、铁元素的最大扩散系数达到22.7 cm2·s-1, 最大扩散距离达到200 μm。
焊缝
因瓦合金
硬质合金
η相
laser-arc hybrid welding
welded seam
invar alloy
cemented carbide
η phase
Abstract
The joining of cemented carbide and invar alloy was obtained by laser-arc hybrid welding scanning electron microscopy, energy-dispersive spectrometers, electron probe micro analyzer were used to investigate the microstructure, chemical composition and element diffusion near interface. The results show that the combination of laser and arc eliminated η phases which were in the side of cemented carbide of welded seam interface. Fe4WC2 dendrite crystals were formed in the side of invar alloy. The element diffusion coefficient in the side of cemented carbide was higher than that under the condition of single arc welding. The diffusion coefficient of nickel and iron was up to 22.7 cm2·s-1, maximum arc welding diffusion distance was up to 200 μm.
中图分类号 TG407
所属栏目
基金项目 上海市自然科学基金资助项目(10ZR1412900); 国家自然科学基金资助项目(51075256); 上海市教育委员会(第五期)重点学科基金资助项目(J51402)
收稿日期 2010/4/1
修改稿日期 2010/12/13
网络出版日期
作者单位点击查看
备注徐培全(1978-), 男, 黑龙江宾县人, 副教授, 博士。
引用该论文: XU Pei-quan,LU Feng-gui,ZHANG Pei-lei,YANG Shang-lei,YU Zhi-shui. Microstructure and Element Diffusion of Welded Seam Interface during Laser-Arc Hybrid Welding of Cemented Carbide and Invar Alloy[J]. Materials for mechancial engineering, 2011, 35(4): 4～6
徐培全,芦凤桂,张培磊,杨尚磊,于治水. 硬质合金/因瓦合金激光-氩弧复合焊缝界面的显微组织与元素扩散[J]. 机械工程材料, 2011, 35(4): 4～6
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参考文献
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【4】LIU Li-ming, HAO Xin-feng. Improvement of laser keyhole formation with the assistance of arc plasma in the hybrid welding process of magnesium alloy[J].Optics and Lasers in Engineering,2009,47(11):1177-1182.
【5】BARBATTI C, GARCIA J, LIED G. Joining of cemented carbides to steel by laser beam welding[J].Materialwissenschaft und Werkstofftechnik,2007,38(11):907-914.
【6】COSTA A, QUINTINO L, MIRANDA M. Microstructural aspects of laser dissimilar welds of hard metals to steels[J].Journal of Laser Applications,2004,16(4):206-211.
【7】肖荣诗, 吴世凯.激光-电弧复合焊接的研究进展[J].中国激光, 2008, 35(11): 1680-1685.
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