Abstract
Abstract Laser direct metal deposition has become an established processing technique for the repair and manufacture of products and the functionalization of surfaces in a variety of industrial applications. The properties of surfaces and parts, depends on the characteristics of the gas-powder flow between the nozzle and the deposition point. A detailed research of the gas- powder stream parameters is conducted. Three-dimensional physical and mathematical model of gas-jet transportation of metal powder particles for different coaxial nozzles has been developed. 3D mass and quantitative powder flows on the substrate are obtained numerically. The comparison of obtained parameters of powder stream is performed.
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