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WANG Ke, ZHENG Zhentai, XUE Haitao, SONG Hongwei. Microstructure of 254SMO/Q235B dissimilar steel welded joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (2): 105-108.
Citation: WANG Ke, ZHENG Zhentai, XUE Haitao, SONG Hongwei. Microstructure of 254SMO/Q235B dissimilar steel welded joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (2): 105-108.
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Microstructure of 254SMO/Q235B dissimilar steel welded joint

  • 1.

    School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300132, China

  • 2.

    Qinhuangdao North Metal Hose Co., Ltd, Qinhuangdao 066000, China

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  • Received Date: December 27, 2011
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    • Abstract
  • Manual TIG was used to weld the dissimilar steel 254SMO/Q235B by taking ERNiCrMo-2,ERNiCrMo-3, ERNiCrMo-10 ERNiCrMo-12,ERNiCrMo-13 and ERNiCrMo-14 nickel-based alloy wire as filler metal. After welding,the welded joint microstructures were analyzed by metallurgical microscope, X-ray diffraction,scanning electron microscope and energy disperse spectroscopy. The results show that when the ERNiCrMo-2,ERNiCrMo-3 and ERNiCrMo-14 welding wire are used,a certain number of cracks will appear in weld. The studies indicate that the welding cracks are solidification cracking. The key factor to cause weld cracking is the difference of physical properties of dissimilar steel and impurity segregation. The welds with good appearance and without welding cracks can be obtained by using the other filler metals.
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