2 thoughts on “What is the hot spray process and what is its technical characteristics”
Nadine
In order to meet the coating requirements of the use of parts, the hot spray process should be combined with comprehensive considerations, performance, process characteristics, coating performance, and applicable environmental environment of the composition, performance, process characteristics, coating performance, and applicable use environment. Materials, choose the spraying process carefully. There are many hot spraying processes, but each method has its own advantages and limitations. From different angles, the thermal spray process selection will draw different results. Take high -speed flame spraying as an example, when the HVOF process is used to spray metal. When alloys, and metal ceramic materials, you can get high -quality coating with high -quality coordination () 70MPa), high density (1%), and less oxide content. Basic counts of people have large calories and cannot be sprayed with disadvantages of oxide ceramics. Therefore, when selecting the hot spraying process, specific analysis should be performed for specific needs. The following analysis should be analyzed from the four aspects of coating performance, spraying material type, spraying economic performance, and on -site construction adaptability. 1. Principles of the selection of coating performance as the starting point 1) The requirements for spraying performance are not high, there are no special requirements for the use environment, and the melting point of the spraying material is lower than 2500 ° C. You can choose the oxygen-acetylene flame spraying process with simple equipment and low cost. Essence Such as the size restoration of general workpieces and conventional surface protection. 2) Specifies are high. The valuable or key components with harsh conditions conditions can be selected. Compared with the flame spraying of oxyety, the flame flow temperature of the plasma spray is high, sufficiently dissolved, non -oxidized, the coating binding strength is high, and the gap rate is low. 3) When the coating requires a high -binding strength and extremely low gap rate, for metal or metal ceramic coating, high -speed flame (HVOF) spraying process can be selected; for oxide ceramic coating, high -speed plasma spraying process (such as PLAZ can Jet plasma spray). If sprayed metal or metal ceramics that are easy to oxidize, a controllable atmosphere or low -pressure plasma spraying process must be selected, such as Ti and B4C coating. 2. Principles of the selection of spraying materials as the starting point 1) Spray metal or alloy materials, you can choose the arc spraying process first. 2) Spray ceramic materials, especially when the oxide ceramic material or the melting point exceeds 3000 ° C, should choose a plasma spraying process. 3) Spray oxide coating, especially WC-CO, CR3C2-NICR nitride coating, can choose high-speed flame spraying processes, and the coating can obtain good comprehensive performance. 4) When spraying biological coatings, a controllable atmosphere or low -pressure plasma spraying process should be used. 3. Under the condition of the selection principle of the starting point of the coating economic behavior, under the condition that the cost of the raw material is not much different, in all thermal spraying processes, the relative process cost of the arc spraying is the lowest, and the process has high spraying efficiency, coating and matrix hunger Based on the characteristics of high intensity and suitable on -site construction, the arc spraying process should be selected as much as possible. 4. When the on -site construction principle is based on the selection of on -site construction as the starting point, the arc spray should be preferred, followed by flame spraying. The convenient HVOF and small power plasma spraying equipment can also be sprayed on site. At present, some people have installed the plasma spraying equipment on the motor vehicle that can be moved to form a mobile spray workshop, thereby completing the long -range spray operation.
In order to meet the coating requirements of the use of parts, the hot spray process should combine comprehensive considerations such as the conditions, performance, process characteristics, coating performance, and applicable environmental environment of various coating materials to determine the appropriate consideration to determine the appropriate consideration. Spraying materials, carefully choose spraying technology. There are many hot spraying processes, but each method has its own advantages and limitations. From different angles, the thermal spray process selection will draw different results. Take high -speed flame spraying as an example, when the HVOF process is used to spray metal.
In order to meet the coating requirements of the use of parts, the hot spray process should be combined with comprehensive considerations, performance, process characteristics, coating performance, and applicable environmental environment of the composition, performance, process characteristics, coating performance, and applicable use environment. Materials, choose the spraying process carefully. There are many hot spraying processes, but each method has its own advantages and limitations. From different angles, the thermal spray process selection will draw different results. Take high -speed flame spraying as an example, when the HVOF process is used to spray metal. When alloys, and metal ceramic materials, you can get high -quality coating with high -quality coordination () 70MPa), high density (1%), and less oxide content. Basic counts of people have large calories and cannot be sprayed with disadvantages of oxide ceramics. Therefore, when selecting the hot spraying process, specific analysis should be performed for specific needs. The following analysis should be analyzed from the four aspects of coating performance, spraying material type, spraying economic performance, and on -site construction adaptability. 1. Principles of the selection of coating performance as the starting point 1) The requirements for spraying performance are not high, there are no special requirements for the use environment, and the melting point of the spraying material is lower than 2500 ° C. You can choose the oxygen-acetylene flame spraying process with simple equipment and low cost. Essence Such as the size restoration of general workpieces and conventional surface protection. 2) Specifies are high. The valuable or key components with harsh conditions conditions can be selected. Compared with the flame spraying of oxyety, the flame flow temperature of the plasma spray is high, sufficiently dissolved, non -oxidized, the coating binding strength is high, and the gap rate is low. 3) When the coating requires a high -binding strength and extremely low gap rate, for metal or metal ceramic coating, high -speed flame (HVOF) spraying process can be selected; for oxide ceramic coating, high -speed plasma spraying process (such as PLAZ can Jet plasma spray). If sprayed metal or metal ceramics that are easy to oxidize, a controllable atmosphere or low -pressure plasma spraying process must be selected, such as Ti and B4C coating. 2. Principles of the selection of spraying materials as the starting point 1) Spray metal or alloy materials, you can choose the arc spraying process first. 2) Spray ceramic materials, especially when the oxide ceramic material or the melting point exceeds 3000 ° C, should choose a plasma spraying process. 3) Spray oxide coating, especially WC-CO, CR3C2-NICR nitride coating, can choose high-speed flame spraying processes, and the coating can obtain good comprehensive performance. 4) When spraying biological coatings, a controllable atmosphere or low -pressure plasma spraying process should be used. 3. Under the condition of the selection principle of the starting point of the coating economic behavior, under the condition that the cost of the raw material is not much different, in all thermal spraying processes, the relative process cost of the arc spraying is the lowest, and the process has high spraying efficiency, coating and matrix hunger Based on the characteristics of high intensity and suitable on -site construction, the arc spraying process should be selected as much as possible. 4. When the on -site construction principle is based on the selection of on -site construction as the starting point, the arc spray should be preferred, followed by flame spraying. The convenient HVOF and small power plasma spraying equipment can also be sprayed on site. At present, some people have installed the plasma spraying equipment on the motor vehicle that can be moved to form a mobile spray workshop, thereby completing the long -range spray operation.
In order to meet the coating requirements of the use of parts, the hot spray process should combine comprehensive considerations such as the conditions, performance, process characteristics, coating performance, and applicable environmental environment of various coating materials to determine the appropriate consideration to determine the appropriate consideration. Spraying materials, carefully choose spraying technology. There are many hot spraying processes, but each method has its own advantages and limitations. From different angles, the thermal spray process selection will draw different results. Take high -speed flame spraying as an example, when the HVOF process is used to spray metal.