The effect of the time and energy parameters of pulsed laser treatment on the structure formation and hardness of high-speed steel after annealing upon surface melting has been studied. The… Click to show full abstract
The effect of the time and energy parameters of pulsed laser treatment on the structure formation and hardness of high-speed steel after annealing upon surface melting has been studied. The results of the metallographic analysis and energy-dispersive X-ray microanalysis of the steel, as well as of the microhardness measurements, have been discussed. It has been shown that the laser-induced remelting of the annealed high-speed steel causes a significant refinement of both the solid solution and of the carbide constituent. The structure of the laser-affected zone and the morphology of dendrites depend on the laser-irradiation regimes.
               
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