| 摘要 |
A method for gas-plasma spraying of metal coatings provides for feeding, accelaration and heating of metal powder particles (5) in the plasma jet and placing the surface of the articles (7) to be coated on the path of the particles (5), the dimensions of the particles (5) introduced to the jet being no less than 20 mu m. The spraying of coatings is carried out at the enthalpy of the plasma jet (3) defined by the following relationship: H = (0.46 - 0.69) 2ROOT d, where H is the enthalpy of the plasma jet (3) in kJ/g, d is the average dimension of the sprayed particles (5); the plasma-forming gas consumption is maintained at a value not exceeding that corresponding to the starting point of sedimentation of the coating (8) at the enthalpy of the plasma jet (3) H = 0.69 2ROOT d, whereas the power of the plasma jet (3) is maintained at a value corresponding to the starting point of sedimentation of the coating (8) at enthalpy H = 0.46 2ROOT d. <IMAGE> |
