The use and difference of thermal spray technology and spray welding technology

       There is no fundamental difference between spray welding and spray welding. The key is that spraying is mainly used to improve the corrosion resistance and hardness of the workpiece surface. Spray soldering is mainly used for soldering because the solder is used differently. This device is universal.







The main results are as follows:



1) When heating the workpiece under different spraying conditions, the surface temperature of the workpiece can always be controlled below 250 °C, and the original structure of the workpiece will not change and will not be deformed. This facilitates complex shapes, thin-walled, long-sleeved and jetted workpieces of some important parts. In order to melt the powder layer, the remelting temperature of the sintered part can reach 900 °C, which is prone to stress and deformation, and most of the workpieces will be annealed and incompletely annealed.



2) The combination of spraying and the surface of the substrate under different bonding states is mainly mechanical occlusion, but there are also micro-welding, and the bonding strength is not high, generally 20 MPa~65 MPa. Spray welding is a metallurgical bond formed by the melting of the powder layer and the surface of the substrate. , the bonding strength is generally as high as 343 MPa~441 MPa.



3) The powder used for different spray melting must be self-fluxing alloy powder, and the powder used for spraying is not limited.



4) The sprayed layers of different structures are uniform and dense, and it is generally believed that there are no pores, and the sprayed layers have some holes.



5) Different sprayed layers cannot withstand impact load and high contact stress, and are suitable for various surface contact coordination. The sprayed layer has high bonding strength and can withstand impact loads.