Characterisation of the laser-clad stellite layers for protective coatings

被引：43

作者：

Jendrzejewski, R

Conde, A

de Damborenea, J

Sliwinski, G

机构：

[1] Polish Acad Sci, Inst Fluid Flow Machinery, PL-80231 Gdansk, Poland

[2] CSIC, CENIM, E-28040 Madrid, Spain

来源：

MATERIALS & DESIGN | 2002年 / 23卷 / 01期

关键词：

stellite; laser melting; properties;

D O I：

10.1016/S0261-3069(01)00074-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Stellite layers produced for protective coatings in a direct process by laser remelting of the powder SF6 on plates of a high-temperature resistive alloy in Ar environment are investigated experimentally. Microphotographs. and EDS analysis reveal a metallurgical bond between the substrate and coating as well as the structural homogeneity along the depth of the layer which is characterised by a chemical composition close to that of the powder. The laser-clad layers show a dendritic and fine-grained structure with a minor presence of impurities. For the coatings an improvement of mechanical properties in comparison to the base material such as the behaviour in wear resistance comparable to that of TiN and values of microhardness up to approximately 1000 HV are observed. On the other hand, corrosion properties depended on the defects and appeared on the surface as a result of the laser process parameters. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：83 / 88

页数：6

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[2]

JENDRZEJEWSKI R, 2000, THESIS PASCI IF FM G

[3]

JENDRZEJEWSKI R, 1998, P SOC PHOTO-OPT INS, V3571, P383

[4] High temperature gas nitriding of Ti6Al4V to improve wear surface properties [J].