Characteristics of thermal spraying
A wide range of processes, metal and its alloys, ceramics, plastics, composite materials can be sprayed on the surface.
The thickness of the coating can be adjusted over a wide range. Flexible process, workpiece can be large or small; Indoor and outdoor; The furnace can be operated outside the furnace.
High productivity, up to 50kg/h. Base metal has little thermal influence and deformation.The technology is economical, small operation and low cost. Poor operating environment, pay attention to self protection. Types of thermal spraying: Currently, it can be divided into different heat sources.
Gas flame spraying, arc spraying, plasma spraying and other special spraying (such as explosive spraying, laser spraying, cold spraying, etc.), spray melting is a processing method, wherein the gas flame is used as a heat source, the self-fusing alloy powder is sprayed on the surface of the weldment to form a spraying layer, and then the spraying layer is heated and melted to form a metallurgical combination with the surface of the weldment (two-step method).
Types of thermal spraying materials: According to the shape of the material, it is divided into wire (silk), bar and powder. According to the material composition can be divided into metal and alloy, self fusing alloys, composite materials, ceramics and plastics. According to the working environment and application requirements of spraying, it can be divided into wear-resistant spraying materials, corrosion resistant spraying materials, and combined with the bottom material. According to the properties of supersonic spraying materials, it can be divided into high temperature oxidation coating, heat insulation coating, corrosion resistant coating, wear-resistant coating, conductive coating, insulating coating, functional coating, self-lubricating coating, bonding bottom material, etc. The thermal spraying process looks like this: cleaning the surface of the piece.
Surface pretreatment, surface roughness, preheat the bottom layer of spraying, spraying working layer.
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