Carbide-reinforced coatings on AISI 316 L stainless steel by laser surface alloying

In order to improve the sliding wear resistance of stainless steel components, carbide-hardened surfaces were produced on AISI 316 L austenitic stainless steel by laser surface alloying. Cr 3C 2 or TiC powder was applied to the steel surface and irradiated using a continuous wave, 300 W, Nd-YAG lase...

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Bibliographic Details
Published in:Surface & coatings technology 1995-12, Vol.76, p.450-455
Main Authors: Tassin, C., Laroudie, F., Pons, M., Lelait, L.
Format: Article
Language:English
Subjects:
Hardening
Laser surface alloying
Stainless steel
TiC
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Summary:In order to improve the sliding wear resistance of stainless steel components, carbide-hardened surfaces were produced on AISI 316 L austenitic stainless steel by laser surface alloying. Cr 3C 2 or TiC powder was applied to the steel surface and irradiated using a continuous wave, 300 W, Nd-YAG laser. Surface alloys resulting from the incorporation of Cr 3C 2 were found to be composed of austenite and M 7C 3 (M≡Fe or Cr). By varying the thickness of the initial Cr 3C 2 coating, alloys with different compositions and microstructures were produced, with related microhardnesses in the range 450–900 Hv. Superficial hardening by titanium carbide was obtained using coarse TiC powder which was incorporated into the melted layer with no, or very little, dissolution: the microhardness of the surface composite was about 450 Hv. For the wear conditions used in this study, a greater improvement in the sliding wear behaviour of the 316 L substrate was achieved with TiC as the hard phase.
ISSN:0257-8972
1879-3347
DOI:10.1016/0257-8972(95)02613-4