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

被引：54
作者：
Tassin, C [1 ]
Laroudie, F [1 ]
Pons, M [1 ]
Lelait, L [1 ]
机构：
[1] EMA, DER, EDF, F-77250 MORET SUR LOING, FRANCE
来源：
SURFACE & COATINGS TECHNOLOGY | 1995年 / 76-77卷 / 1-3期
关键词：
laser surface alloying; stainless steel; hardening; TiC;
D O I：
10.1016/0257-8972(95)02613-4
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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. Cr3C2 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 Cr3C2 were found to be composed of austenite and M(7)C(3) (M = Fe or Cr). By varying the thickness of the initial Cr3C2 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.
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页码：450 / 455
页数：6
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