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CHEN Cuixin, XUE Haitao, CHEN Cuiling, DING Jing, HAN Xiao, TANG Hao. Effect of nano oxide on microstructure and mechanical properties of low alloy high strength steel welds[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(9): 29-34.
Citation: CHEN Cuixin, XUE Haitao, CHEN Cuiling, DING Jing, HAN Xiao, TANG Hao. Effect of nano oxide on microstructure and mechanical properties of low alloy high strength steel welds[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(9): 29-34.
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Effect of nano oxide on microstructure and mechanical properties of low alloy high strength steel welds

  • 1.

    School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;Tianjin Key Laboratory of Laminating Fabrication and Interface Control Technology for Advanced Materials, Hebei University of Technology, Tianjin 300130, China;Research Institute for Equipment Materials, Hebei University of Technology, Tianjin 300130, China

  • 2.

    School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China

  • 3.

    School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;Tianjin Key Laboratory of Laminating Fabrication and Interface Control Technology for Advanced Materials, Hebei University of Technology, Tianjin 300130, China

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  • Received Date: November 10, 2014
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  • Aimed at the improvement of mechanical properties for new generation iron and steel welds, a new method, oxide metallurgy was adopted. The adopted oxides were added into liquid welding pool through electrode and the effects on microstructure and mechanical properties were studied. The results showed that a large quantity of spherical complex inclusions with the mean size of 0.2~0.8 μm were found in Al2O3, TiO2 and Ce2O3 added weld deposits. These inclusions effectively promote the formation of acicular ferrite with mean size of 1~2 μm. The impact toughness of weld deposits increase evidently compared to that of no oxide added case, especially for TiO2 and Ce2O3 added weld deposits which have impact toughness of about 150 J/cm2 (-20℃), increasing by 67%.
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