Abstract: Disclosed is a cold spray gun and a cold spray apparatus using the same capable of stably heating a raw material powder to a specific high temperature with an achievement of compactness and lightweight of the apparatus. In order to achieve the above described object, there is provided a cold spray gun configured to form a coating film by spraying a raw material powder carried on a carrier gas from a nozzle outlet by a supersonic flow together with a working gas heated to a temperature equal to or lower than a melting point or a softening point of the raw material powder, and causing the raw material powder to collide with a base material in a solid state, the cold spray gun including; a chamber containing the working gas to be delivered to the nozzle; and is characterized in that a gas heating pipe constituted from a heating resistor which causes resistance heating by being energized is arranged in the chamber, and the working gas flowing into the interior of the gas heating pipe is heated.

Abstract: The present invention provides a cold spray gun and a cold spray apparatus equipped with the same, which are capable of effectively suppressing clogging of a raw material powder feeding port and operating the cold spray apparatus equipped with the cold spray gun by maintaining a working gas temperature at a high temperature closer to a melting point or a softening point of the raw material powder. In order to achieve the above described object, there is provided a cold spray gun configured to spray out a raw material powder transported by a carrier gas, together with a working gas heated to a temperature equal to or lower than a melting point or a softening point of the raw material powder as a supersonic flow and to cause the raw material powder to collide with a base material in a solid state, thereby to form a coating film.

Abstract: An object of the present invention is to provide a cold-spray nozzle that can be continuously used for a long time without causing clogging up of the nozzle compared to a conventional case to effectively obtain a high-quality film by a cold-spray method. To achieve the object, the cold-spray nozzle that is a convergent-divergent type cold-spray nozzle comprising a convergent part, a throat part, and a divergent part sequentially arranged in this order for constituting a working gas flow path along a working gas flow direction from an inlet side to an outlet side is employed. The inner peripheral surface of the divergent part has a conical shape and at least a part of the inner peripheral surface is constituted by a glass material.

Abstract: The object of the present invention is to provide a cold spray method in which spray efficiency is improved by using a device comprising a similar construction to the conventional ones with minor change in conditions. The cold spray method employs the nozzle for cold spray system which comprises a convergent shape part, a throat part and a conical divergent shape part widened forward from the throat part used for making the raw material powder introduce from an inlet of the nozzle, which is located in the convergent shape part, into and shoot as a supersonic flow by using a working gas having temperature equal to or lower than a melting point of the raw material powder from a spout provided at the tip of the divergent shape part, wherein the convergent shape part is composed of a preheating region and a convergent region.

Abstract: An object of the present invention is to provide a cold-spray nozzle that can be continuously used for a long time without causing clogging up of the nozzle compared to a conventional case to effectively obtain a high-quality film by a cold-spray method. To achieve the object, the cold-spray nozzle that is a convergent-divergent type cold-spray nozzle comprising a convergent part, a throat part, and a divergent part sequentially arranged in this order for constituting a working gas flow path along a working gas flow direction from an inlet side to an outlet side is employed. The inner peripheral surface of the divergent part has a conical shape and at least a part of the inner peripheral surface is constituted by a glass material.

Abstract: The object of the present invention is to provide a cold spray method in which spray efficiency is improved by using a device comprising a similar construction to the conventional ones with minor change in conditions. The cold spray method employs the nozzle for cold spray system which comprises a convergent shape part, a throat part and a conical divergent shape part widened forward from the throat part used for making the raw material powder introduce from an inlet of the nozzle, which is located in the convergent shape part, into and shoot as a supersonic flow by using a working gas having temperature equal to or lower than a melting point of the raw material powder from a spout provided at the tip of the divergent shape part, wherein the convergent shape part is composed of a preheating region and a convergent region.