| Metallographic Analyses of Laser Gladded WC-Ni and WC-Co Hard-facing Metals |
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| 引用本文： | HK Chikwanda,M Chiremba,C Van Rooyen. Metallographic Analyses of Laser Gladded WC-Ni and WC-Co Hard-facing Metals[J]. 材料热处理学报, 2004, 0(5) |
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| 作者姓名： | HK Chikwanda M Chiremba C Van Rooyen |
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| 作者单位： | 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 |
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| 摘 要： | CLADDING is used to improve the surface propertiesof metallic mechanical components such as resistanceto wear and corrosion.It involves the application of asurface layer with the required properties on top of acheap material without those properties.Lasercladding is a process that is used to fuse with laserbeam another material which has differentmetallurgical properties on a substrate,whereby a verythin layer of the substrate has to be melted in order toachieve metallurgical bonding with mi…
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Metallographic Analyses of Laser Gladded WC-Ni and WC-Co Hard-facing Metals |
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| HK Chikwanda,M Chiremba,C Van Rooyen. Metallographic Analyses of Laser Gladded WC-Ni and WC-Co Hard-facing Metals[J]. Transactions of Materials and Heat Treatment, 2004, 0(5) |
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| Authors: | HK Chikwanda M Chiremba C Van Rooyen |
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| Affiliation: | HK Chikwanda1,M Chiremba1,C Van Rooyen2 1. Department of Chemical &Metallurgical Engineering,Tshwane University of Technology,Pretoria,South Africa. 2. National Laser Centre,CSIR,Pretoria,South Africa |
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| Abstract: | 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. |
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| Keywords: | Laser cladding clad layer substrate metal dilution clad height clad depth. |
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