Fe-Based Wear-Resistant Coating on Railroad Switch Prepared Using Laser Cladding Technology and Its Properties

Yingnan, 李英男 Li; Zhuguo, 李铸国 Li; Xiaoxiang, 王晓翔 Wang; Xiang, 徐翔 Xu

doi:10.3788/cjl202047.0402009

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2021

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“…The microhardness of the U71Mn steel was improved by 3.7 times by preparing Ni60-25%WC coating on it [11]. Fe-based Fe–W–Cr coating was cladded on U71Mn steel using semiconductor laser by Li and his coauthors [12], the microhardness and wear resistance of the substrate was significantly improved due to presence of the coating. All these researches illustrated that laser cladding technology is an ideal candidate way to improve the wear performance of U71Mn steel.…”

Section: Introductionmentioning

confidence: 99%

Laser shock peening Fe-based coatings for enhancing wear and corrosion resistance

Yang

Zhou

Chen

et al. 2021

Materials Science and Technology

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Laser Shock Peening (LSP) was introduced to reduce the residual stress and improve the wear and corrosion resistance of Fe-based 43X coating on worn U71Mn steel by laser cladding technology. The tensile stress decreased with increasing of laser power density and impact times, finally, transferred to compressive stress. The microstructure of the coatings was refined due to LSP treatment. The refined microstructure and existence of retained Austenite phase resulted in significant improvement in microhardness and anti-wear performances. The coatings after LSP process presented better corrosion resistance. However, impact three times with a higher power density has negative effect on improving the corrosion resistance.

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Section: Introductionmentioning

confidence: 99%