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LI Haixin, YANG Zhenlin, YIN Ziqiang, ZHANG Linlin. Effect of addition amount of TiO2 on morphology and microstructure of slag during underwater wet welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 51-54. DOI: 10.12073/j.hjxb.20170412
Citation: LI Haixin, YANG Zhenlin, YIN Ziqiang, ZHANG Linlin. Effect of addition amount of TiO2 on morphology and microstructure of slag during underwater wet welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 51-54. DOI: 10.12073/j.hjxb.20170412
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Effect of addition amount of TiO2 on morphology and microstructure of slag during underwater wet welding

  • Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Institute of Oceanographic Instrumentation, Shandong Academy of Sciences, Qingdao 150011, China

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  • Received Date: June 01, 2015
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  • In this paper, the autonomous rutile type carbon steel electrode was used for underwater wet welding. It focused on the effect of the addition amount of TiO2 in the coated on the morphology and microstructure of slag. By composition and phase analysis of slag, the main phase of slag was Fe2MnTi3O10, and it also contained a small amount of Ca2SiO4 and free oxides. By morphology and microstructure analysis of slag, it found that when the addition amount of TiO2 was larger, the slag was compact. Furthermore, the gray stripe phase in the microstructure of slag was bulky, which was advantageous to the detachability of slag. With the decrease of addition amount of TiO2 and increase of addition amount of CaCO3, the slag became loose and viscous slag occurred. Meanwhile, the gray stripe phase in the microstructure changed thin, which was not advantageous to the detachability of slag.
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