Evaluation of Dynamic Impact on Nanosized Particles in the Process of Centrifugal Surfacing of Powder Charge

Abstract

A physico-mathematical model of the process of formation of coatings with nanosized modifiers by induction centrifugal surfacing has been developed. The forces acting on a particle in a liquid melt during isothermal holding during induction centrifugal surfacing are determined. A dependence is obtained that determines the rate of displacement of nanoscale particles from the initial position in the liquid melt during induction centrifugal surfacing of coatings, for various materials and technological regimes. The implementation of the model allows selecting materials and technological regimes that minimize the heterogeneity of the concentration of particles of the strengthening phase and nano-sized particles in the melt of the coating, or, depending on the task, the model allows selecting the deposition regimes for the purposeful displacement of nanoscale particles within the required limits. The practical application of the obtained results for particles of TiC with a size of 20 nm is shown.

Keywords

• physico-mathematical model of dynamic impact
• powder charge
• antifriction coatings
• centrifugal induction surfacing
• nanosized modifiers