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Volume 24 Issue 9
Sep.  2017
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文章导航 >  矿物冶金与材料学报（英文）  > 2017  >  24(9): 999-1003
Liang Zhaoand Qun-hu Xue, Effects of temperature-gradient-induced damage of zirconia metering nozzles, Int. J. Miner. Metall. Mater., 24(2017), No. 9, pp. 999-1003. https://doi.org/10.1007/s12613-017-1488-0
Cite this article as:
Liang Zhaoand Qun-hu Xue, Effects of temperature-gradient-induced damage of zirconia metering nozzles, Int. J. Miner. Metall. Mater., 24(2017), No. 9, pp. 999-1003. https://doi.org/10.1007/s12613-017-1488-0
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研究论文

Effects of temperature-gradient-induced damage of zirconia metering nozzles

  • College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China

  • Shaanxi Techno-institute of Recycling Economy, Xi'an 710055, China

  • 通讯作者:

    Qun-hu Xue    E-mail: xuequnhu@xauat.edu.cn

  • The effects of temperature-gradient-induced damage of zirconia metering nozzles were investigated through analysis of the phase composition and microstructure of nozzle samples. The analysis was carried out using X-ray diffraction and scanning electron microscopy after the samples were subjected to a heat treatment based on the temperatures of the affected, transition, and original layers of zirconia metering nozzles during the continuous casting of steel. The results showed that, after heat treatment at 1540, 1410, or 1300℃ for a dwell time of 5 h, the monoclinic zirconia phase was gradually stabilized with increasing heat-treatment temperature. Moreover, a transformation to the cubic zirconia phase occurred, accompanied by grain growth, which illustrates that the temperature gradient in zirconia metering nozzles affects the mineral composition and microstructure of the nozzles and accelerates damage, thereby deteriorating the quality and service life of the nozzles.
    • Research Article

    Effects of temperature-gradient-induced damage of zirconia metering nozzles

    + Author Affiliations
      Abstract
    • The effects of temperature-gradient-induced damage of zirconia metering nozzles were investigated through analysis of the phase composition and microstructure of nozzle samples. The analysis was carried out using X-ray diffraction and scanning electron microscopy after the samples were subjected to a heat treatment based on the temperatures of the affected, transition, and original layers of zirconia metering nozzles during the continuous casting of steel. The results showed that, after heat treatment at 1540, 1410, or 1300℃ for a dwell time of 5 h, the monoclinic zirconia phase was gradually stabilized with increasing heat-treatment temperature. Moreover, a transformation to the cubic zirconia phase occurred, accompanied by grain growth, which illustrates that the temperature gradient in zirconia metering nozzles affects the mineral composition and microstructure of the nozzles and accelerates damage, thereby deteriorating the quality and service life of the nozzles.
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