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Metallographic Analyses of Laser Gladded WC-Ni and WC-Co Hard-facing Metals

材料热处理学报 2004年第5期 996-999页

作者： HK Chikwanda,M Chiremba,C Van Rooyen Department of Chemical &Metallurgical Engineering Tshwane University of Technology Pretoria South Africa. Department of Chemical &Metallurgical Engineering Tshwane University of Technology Pretoria South Africa. National Laser Centre CSIR Pretoria South Africa

Laser cladding is performed to improve the surface properties of metallic machine components. Extensive work is being conducted to investigate the relationships among the cladding parameters, clad powder characteristics and the quality of the clad layer. This work presents some of the metallographic analyses results of WC -Ni and WC-Co clad layers. The clad layers are characterised with non-uniform carbide particles, mostly WC imbedded in a more ductile matrix. The transition from the clad layer to the substrate metal had a distinct dilution zone. The ratio of this zone to the clad height was in the range of 10 -12% and this still needs to be refined.

关键词： Laser cladding clad layer substrate metal dilution clad height clad depth.

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Metallographic Analyses of Laser cladded WC-Ni and WC-Co Hard-facing Metals

Metallographic Analyses of Laser Cladded WC-Ni and WC-Co Har...

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14～(th) Congress of International Federation for Heat Treament and Surface Engineering

作者： HK Chikwanda M Chiremba C Van Rooyen Department of Chemical ＆ Metallurgical Engineering Tshwane University of TechnologyPretoria South Africa Department of Chemical ＆ Metallurgical Engineering Tshwane University of TechnologyPretoria South Africa National Laser Centre CSIRPretoria South Africa

＜正＞ Laser cladding is performed to improve the surface properties of metallic machine components. Extensive work is being conducted to investigate the relationships among the cladding parameters, clad powder characteristics and the quality of the clad layer. This work presents some of the metallographic analyses results of WC -Ni and WC-Co clad layers. The clad layers are characterised with non-uniform carbide particles, mostly WC imbedded in a more ductile matrix. The transition from the clad layer to the substrate metal had a distinct dilution zone. The ratio of this zone to the clad height was in the range of 10 -12% and this still needs to be refined.

关键词： Laser cladding clad layer substrate metal dilution clad height clad depth.

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