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공정변수에 따른 레이저표면합금층의 형상 및 성분변화에 관한 연구
崔程英,李昌禧 한국레이저가공학회 1999 한국레이저가공학회지 Vol.2 No.2
This study includes a basic feature of laser surface alloying for enhancing the surface properties of materials. Effects of laser processing parameters such as beam power, beam size, scanning speed on the shape and composition of alloyed layer was simulated in case of moving beam conditions (2-dimensional numerical methods). Simulated results were compared with experiments, in which the plasma coating of 80% N1+ 20% Cr deposited on the SS41 substrate was remelted with CO₂laser with Gaussian energy distribution. Simulation and experiments revealed that the shape (dimension) and composition of laser alloyed layer were strongly dependent upon the process parameters, especially interaction time (travel speed) as compared to beam diameter, beam power and absorptivity. The shape and composition of alloyed layervaried more or less exponentially with parameters.