Cladding of chromium onto mild steel by low-pressure laser spraying

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作者：

Y Isshiki，S Fujiki，S Itoh，M Kohga，M Hashimoto

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摘要：

Clad layers of chromium onto a mild steel substrate are obtained by low-pressure laser spraying and their composition dependence on impinged energy density is studied in detail with their microstructure and microhardness. When impinged energy density Ei is selected to be 64 W mm2, the obtained clad layer consists of a Cr30Fe70 alloy. The thickness of the alloying layer decreases with decreasing impinged energy density Ei. A single phase of chromium grows when Ei is selected to be smaller than 13 W mm2. The presence of CrFe alloying layer extremely enhances corrosion resistance on steel surface.

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关键词：

Experimental/ carbon steel chromium chromium alloys cladding techniques corrosion protection corrosion protective coatings electrochemical analysis microhardness pulsed laser deposition spray coating techniques surface hardening surface topography X-ray chemical analysis/ clad layers chromium mild steel substrate laser spraying composition dependence energy density dependence microstructure microhardness alloying layer thickness corrosion resistance anodic polarization curve surface hardening/ A8160B Surface treatment and degradation of metals and alloys A6855 Thin film growth, structure, and epitaxy A8115I Pulsed laser deposition A8140N Fatigue, embrittlement, and fracture A8280F Electrochemical analytical methods A8280D Electromagnetic radiation spectrometry (chemical analysis)/ CrFe/int Cr /int Fe/int C/int Fe /ss C/ss CrFe/bin Cr /bin Fe/bin