12%Cr鋼へのステライト6合金のTIG及びレーザ肉盛に関する研究

概要

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In order to repair and improve the performance of machinery parts of a power plant, pulsed Nd : YAG laser, CO2 laser, diode laser and TIG cladding were carried out for deposition of Stellite 6 alloy on the surface of 12%Cr martensitic stainless steel plate (t=12mm). These clad layers were characterized by investigating cross sectional geometry, microstructural features and DAS (Dendrite Arm Spacing) values, dilution, macro-and micro-distribution of alloying elements, primary and eutectic phases, hardness distribution and wear resistance by microscope, SEM, EDS, EPMA, X-ray diffractometer, Vickers hardness tester and Oogoshi wear resistance tester. The small dilution ratios, fine microstructures, narrow widths of heat-affected zones, high Vickers hardness, excellent wear-resistance, high contents of Co and low contents of Fe in the clad layers were obtained by laser cladding in comparison with TIG process.
社団法人溶接学会の論文
2005-05-05