Abstract

In order to obtain the high wear- and corrosion-resistant nickel based alloy coatings for laser remanufacturing fretting damaged metal parts which are serviced under high-temperature corrosion and wear conditions, a novel NiCrSiFeBW–CeO₂ alloy powder was designed by increasing the content of B and Si, adding tungsten and CeO₂ using JMatpro software on the basis of Ni60 alloy powder composition, and the NiCrSiFeBW–CeO₂ coating was successfully cladded on 45# steel under different laser energy area densities. The microstructure, wear and corrosion behaviors of the NiCrSiFeBW–CeO₂ coatings were systematically studied. The results show that novel NiCrSiFeBW–CeO₂ coating produced by laser cladding not only has no cracks but also has both high wear resistance and corrosion resistance due to some ultra-fine compound particle phases in situ generated in its structure. Among these phases, the B₃Cr₅, CrB₄, (Cr, Ni)₃C₂, Cr₇C₃, W₃Cr₁₂Si₅ and (Fe, Ni)₅Si₃ played a significant role in reinforcing the wear resistance of the coating, while the B₃Cr₅, W₃Cr₁₂Si₅ and CrB₄ enhanced the corrosion resistance of the coating. The novel NiCrSiFeBW–CeO₂ coating prepared under 100 J/mm² EAD has the best comprehensive performance, the wear loss is 7.53 × 10⁻⁵ mm³/N, the E_corr is − 0.1738 V. Compared with Ni60 alloy coating, the novel Ni-based coating not only has a better laser cladded formability but also similar wear resistance and better corrosion-resistance. It provides a reference for repairing fretting damaged metal parts by laser cladding the nickel based coating with high wear and corrosion resistance.

Graphic Abstract

中文翻译：

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具有高耐磨性和耐腐蚀性的新型NiCrSiFeBW–CeO 2激光熔覆

摘要

为了获得用于在高温腐蚀和磨损条件下维修的微动损伤金属零件的激光再制造的高耐磨和​​耐蚀镍基合金涂层，设计了一种新型的NiCrSiFeBW-CeO ₂合金粉末，方法是增加其含量。 B和Si，在Ni60合金粉末成分的基础上，使用JMatpro软件添加钨和CeO ₂，并在不同激光能量区域密度下成功地将NiCrSiFeBW–CeO ₂涂层覆盖在45＃钢上。系统研究了NiCrSiFeBW–CeO ₂涂层的组织，磨损和腐蚀行为。结果表明，新型NiCrSiFeBW–CeO ₂激光熔覆产生的涂层不仅没有裂纹，而且由于其结构中原位产生一些超细化合物颗粒相，因此具有很高的耐磨性和耐腐蚀性。在这些相中，B ₃ Cr ₅，CrB ₄，（Cr，Ni）₃ C ₂，Cr ₇ C ₃，W ₃ Cr ₁₂ Si ₅和（Fe，Ni）₅ Si ₃起到了增强磨损的重要作用。涂层的电阻，而B ₃ Cr ₅，W ₃ Cr ₁₂ Si ₅和CrB₄增强了涂层的耐腐蚀性。在100 J / mm ² EAD下制备的新型NiCrSiFeBW–CeO ₂涂层具有最佳综合性能，磨损损耗为7.53×10 ^-5  mm ³ / N，E _corr为− 0.1738V。与Ni60合金涂层相比，新颖的镍基涂层不仅具有更好的激光熔覆成型性，而且具有相似的耐磨性和更好的耐腐蚀性。它为通过激光熔覆具有高耐磨性和耐蚀性的镍基涂层提供了维修微动损坏的金属零件的参考。

图形摘要