The results of investigations of the special features of the coaxial laser surfacing of the Mo þ NiCrBSi powder alloy are presented. The dependences of the parameters of dissolution of iron in the deposited beads on the parameters of the surfacing process are determined. Technological recommendations are proposed.The coatings of nickel-based alloys, especially of the NiCrBSi system, ensure a corrosion wear resistance level comparable with the properties of alloys based on expensive and scarce cobalt, even at high temperatures. To improve the tribological properties in the conditions of dry sliding and reduce the friction coefficient, molybdenum is added to the coating. In [1,2], the authors presented examples of successful production of coatings of the Mo þ NiCrBSi system by plasma spraying. However, in spraying powders of different alloys, it is not possible to produce a stable metallic bond between the coating and the parent metal. A more promising method is the coaxial laser gas powder surfacing (CGPS) [3 -5]. The coaxial system of feeding the powder into the surfacing zone in comparison with the lateral feeding method is characterized by smaller powder losses and can be used to solve the problem of separate melting of the substrate and the filler powder. Other advantages of CGPS include the minimum thermal effect on the parent material, the wider range in which the parameters of the surfacing process are varied, the resistance to technological perturbations, the possibility of depositing surfaces with complicated geometry, and also the ecological efficiency of the process.The aim of the present work is the development of technological recommendations for the CGPS process of composite materials of the Mo þ NiCrBSi system with simultaneous addition of all components to the melting zone. The main requirement for the deposited metal is the minimum dissolution of the refractory particles of molybdenum, required for the formation of metallic bonds, and also melting of the parent metal. Other requirements are the minimum pore formation and the absence of cracks, and also the optimum geometry of the deposited beads.