Numerical Simulation Status of Critical Velocity of Cold Spray Particles

Cold spray coating is a kind of material surface protection method developed in recent years. How to make better and more efficient use of spraying technology to realize the surface protection of materials has attracted the attention and research of scholars all over the world. In the spraying process, because of the high speed, high temperature and large plastic deformation, the transient process of the collision is difficult to be measured in the experiment. With the development of numerical simulation technology, scholars in China and abroad have explored this process by means of simulation, and have obtained a series of practical guiding conclusions, which have well guided the experiment. The simulation algorithm, critical in China discrimination methods and factors of critical velocity, and the calculation method of critical velocity of scholars in China and abroad exploring the transient process of collision were reviewed, and the development prospect was prospected.