Effect of Reduction on Bonding Interface of Hot-rolled Wear-resistant Steel BTW1/Q345R Cladding Plate

  • Chenchen Zhi (支晨琛)
  • Lifeng Ma (马立峰)Email author
  • Qingxue Huang
  • Zhiquan Huang
  • Pengtao Liu
Metallic Materials


Wear-resistant cladding plates consisting of a substrate (Q345R) and a clad layer (BTW1) were bonded through hot rolling at the temperature of 1 200 °C and a rolling speed of 0.5 m/s. The microhardness of the cladding plate was also tested after being heat treated. The microstructure evolution on the interface of BTW1/Q345R sheets under various reduction rates was investigated with a scanning electron microscope (SEM) and EBSD. It is found that the micro-cracks and oxide films on the interface disappear when the reduction is 80%, whereas the maximum uniform diffusion distance reaches 10 μm. As a result, a wide range of metallurgical bonding layers forms, which indicates an improved combination between the BTW1 and the Q345R. Additionally, it is discovered that the unbroken oxide films on the interface are composed of Mn, Si or Cr at the reductions of 50% and 65%. The SEM fractography of tensile specimen demonstrates that the BTW1 has significant dimple characteristics and possesses lower-sized dimples with the increment in reduction, suggesting that the toughness and bonding strength of the cladding plates would be improved by the increase of reduction. The results reveal that a high rolling reduction causes the interfacial oxide film broken and further forms a higher-sized composite metallurgical bonding interface. The peak microhardness is achieved near the interface.

Key words

BTW1/Q345R clad plate hot-rolled bonding reduction oxide films fractography 


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Copyright information

© Wuhan University of Technology and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Chenchen Zhi (支晨琛)
    • 1
    • 2
  • Lifeng Ma (马立峰)
    • 1
    Email author
  • Qingxue Huang
    • 1
    • 3
  • Zhiquan Huang
    • 1
  • Pengtao Liu
    • 2
    • 3
  1. 1.The Coordinative Innovation Center of Taiyuan Heavy Machinery EquipmentTaiyuan University of Science and TechnologyTaiyuanChina
  2. 2.Shanxi Provincial Key Laboratory of Metallurgical Equipment Design and TechnologyTaiyuan University of Science and TechnologyTaiyuanChina
  3. 3.School of Mechanical EngineeringTaiyuan University of TechnologyTaiyuanChina

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