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<p>At present, the application of ultra-thick super-bainitic steel has attracted wide attention. In this paper, the effect of undercooled austenite cooling rate on the microstructure and wear properties of bainitic steel was investigated by scanning electron microscopy, transmission electron microscopy, electron backscatter diffraction, and x-ray diffraction using medium carbon carbide-free bainitic steel as the research object. The results show that the samples with faster cooling rates have lower wear loss and better wear properties. A deformation zone exists in the subsurface, and the greater the cooling rate, the smaller the thickness of the deformation zone. A significant retained austenite transformation was observed in the deformed layer.</p>

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The Effect of Undercooled Austenite Cooling Rate on the Wear Performance of Carbide-Free Bainitic Steel

  • 期刊论文

  • 发表日期：

    2025年8月6日

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  • Yu Zhang,
  • Ruoxian Yang,
  • Xiaoyan Long,
  • Dongyun Sun,
  • Fucheng Zhang,
  • Zhinan Yang,
  • Yanguo Li

摘要

At present, the application of ultra-thick super-bainitic steel has attracted wide attention. In this paper, the effect of undercooled austenite cooling rate on the microstructure and wear properties of bainitic steel was investigated by scanning electron microscopy, transmission electron microscopy, electron backscatter diffraction, and x-ray diffraction using medium carbon carbide-free bainitic steel as the research object. The results show that the samples with faster cooling rates have lower wear loss and better wear properties. A deformation zone exists in the subsurface, and the greater the cooling rate, the smaller the thickness of the deformation zone. A significant retained austenite transformation was observed in the deformed layer.