Abstract
In order to repair and improve the performance of machinery parts of power plant, pulsed Nd: YAG laser, CO2 laser, diode laser, and TIG cladding were carried out for deposition of Stellite 6 powder on the surface of 12%Cr martensitic stainless steel plate (t=12mm). Shape of clad layer, dilution, Vickers hardness, DAS (Dendrite Arm Spacing) value, and microstructure were investigated. X-ray diffraction analysis, EPMA analysis, EDS analysis and wear test of clad layer were carried out to compare the characteristics of different clad processes. Laser clad processes comparing with TIG cladding, have the small dilution rate, microstructure of impalpable, narrow width of heat-affected zone, high Vickers hardness, excellent wear-resistance, high content of Co, and low content of Fe in clad layerIn order to repair and improve the performance of machinery parts of power plant, pulsed Nd: YAG laser, CO2 laser, diode laser, and TIG cladding were carried out for deposition of Stellite 6 powder on the surface of 12%Cr martensitic stainless steel plate (t=12mm). Shape of clad layer, dilution, Vickers hardness, DAS (Dendrite Arm Spacing) value, and microstructure were investigated. X-ray diffraction analysis, EPMA analysis, EDS analysis and wear test of clad layer were carried out to compare the characteristics of different clad processes. Laser clad processes comparing with TIG cladding, have the small dilution rate, microstructure of impalpable, narrow width of heat-affected zone, high Vickers hardness, excellent wear-resistance, high content of Co, and low content of Fe in clad layer
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