Abstract：To investigate the influences of laser parameters and supplementary process parameters on the texture profiles, and determine the mechanical properties of the textured points, the system matching experiments of laser pulse parameters were conducted. Three textures with crater shape, sombrero shape and Wtype donut shape were obtained by different parameter combinations. The effects of type, pressure and angle of aid gas and laser pulse frequency on the textured topography dimensions of the sombrero shape were discussed. The microstructure and the hardness of crater shape textured topography were also investigated. The results show that the shape and the dimension of textured topography can be controlled by laser parameters and supplementary process parameters.Oxygen is not favorable for the formation of sombrero shape topography, while nitrogen is not favorable for the formation of crater shape topography. The microstructure of the textured points is acicular martensite. Compared with matrix material, the hardness of textured points has been increased 3 times.
2013, Vol. 34 
