Cold spray nozzle and spraying device that uses the cold nozzle for cold spray

摘要

A nozzle for a system cold spray comprising a portion convergently a throat portion and a portion divergently flared forward from the throat part used for making raw material powder which is introduced into the inlet nozzle is in the part convergently projected as a supersonic flow by using a working gas having a temperature equal to or lower than the melting point of the raw material powder from the spout provided at the tip of the part divergently, characterized in that the part convergently comprises a preheating zone provided on the front side of the nozzle and a converging zone, the preheating zone and the convergent zone raises the temperature of the raw material powder, and the nozzle is provided with a heating device in a preheating zone and the heating device is a unit EAF incorporated into the surface of the inner wall part convergently.