OPTIMIZATION OF THE PARAMETERS OF ADDITIVE GROWING OF FUNCTIONALLY HETEROGENEOUS NICKEL-BASED MATERIALS

Optimization of the parameters of laser cladding of an N85Yu15 nickel-alumide powder to obtain single tracks has been carried out. In the course of the experiment, the authors changed the laser-radiation power, the scanning velocity, and the position of the focus of the laser beam relative to the surface of the powder layer. It has been found that the dimensions of single tracks decrease as the scanning velocity grows. The dependence of the geometric characteristics of single tracks on the temperature of the melt pool has been investigated. The microhardness of the obtained specimens correlated with the quantity of energy imparted to the powder layer and to the melt-bath temperature. The microstructure of single tracks has been investigated. It has been established that the set of experimental data is described, in generalized space and energy coordinates, by the linear dependence. With account taken of the obtained data, multilayer objects were clad, an analysis of the elemental composition of the specimens has been made, and elemental mapping has been performed.
   
Author:  M. A. Gulov, A. G. Malikov, A. A. Filippov
Keywords:  additive technologies, laser cladding, optimization, aluminum nickelide, single track, selective laser welding, microhardness
Page:  1809