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孔耀,刘宗德,李斌.铜基耐蚀合金熔覆层的制备及耐蚀特性[J].稀有金属材料与工程(英文),2021,50(8):2694~2699.[Kong Yao,Liu Zongde and Li Bin.Preparation and Corrosion Resistance of Laser-Cladded Cu-Based Alloy Coatings on Q235 Steel[J].Rare Metal Materials and Engineering,2021,50(8):2694~2699.]
Preparation and Corrosion Resistance of Laser-Cladded Cu-Based Alloy Coatings on Q235 Steel
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Received:June 17, 2020  
DOI:
Key words: copper-based coating  laser cladding  microstructure  corrosion resistance
Foundation item:Equipment Pre-research Fund(No.61409220202)
Author NameAffiliation
Kong Yao,Liu Zongde and Li Bin  
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Abstract:
      Copper-based coatings were prepared on the surface of Q235 steel by fiber laser under different powers. Microstructure, phase composition, corrosion resistance of the coatings were revealed by scanning electron microscopy (SEM) equipped with energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and electrochemical workstation, respectively. Results show that the coatings are well bonded to the substrate. The coating microstructure consists of cellular, coarse dendrites, fine dendrites and columnar grain structure from the bottom to the top. The coatings mainly contain two phases including Cu(Ni,Fe) and Ni(Cr,Mo,Fe) solid solution. The coating with two layers prepared under 2000 W exhibits optimal corrosion resistance due to its highest corrosion potential and lowest corrosion current density.