Patent DE-102010023022-A1 (DE)
Title: Method for forming a thermal injection coating on a coating forming surface, comprises depositing- and coating starting material powder on a coating forming surface and then hardening in order to form a coating
Inventor: ITOH TOSHIKI
IPC: C23C4/12
Filed: 2010-06-08
Abstract: The method for forming a thermal injection coating on a coating forming surface, comprises thermally spraying starting material powder on the coating forming surface and depositing- and coating the starting material powder on the coating forming surface and then hardening in order to form a coating. The starting material powder is deposited through thermal spraying on the surface with 42-85% of the total quantity in the solid-phase condition in order to increase the ratio of the crystallites remaining in the starting material powder and to guarantee high heat conductivity. The method for forming a thermal injection coating on a coating forming surface, comprises thermally spraying starting material powder on the coating forming surface and depositing- and coating the starting material powder on the coating forming surface and then hardening in order to form a coating. The starting material powder is deposited through thermal spraying on the surface with 42-85% of the total quantity in the solid-phase condition in order to increase the ratio of the crystallites remaining in the starting material powder and to guarantee high heat conductivity. The starting material powder consists of powder with large particle size, on whose surface, powder with small particle size is accumulated in order to form the starting material powder. The starting material powder is subdivided into powder with large particle size and power with small particle size. The powder with small particle size is deposited through thermal spraying in the fluid phase condition on the surface before the deposition and coating formation process, and the powder with large particle size is deposited in the solid-phase condition on the surface in which the thermal spraying time flow is controlled in the thermal spraying process. The thermal spraying of the powder with large particle size and with small particle size is separately carried out. The powder with large particle size is applied in the solid-phase condition and the powder with small particle size is applied in the fluid-phase condition in the deposition- and coating forming process so that the mixed starting material powder is applied in solid and fluid phase condition on the coating forming surface in order to form a coating. The plasma is controlled in the thermal spray coating process corresponding to the particle size of the starting material powder. The starting material powder is applied in the deposition and coating forming process with its interior in a solid-phase condition and its surface side in a fluid-phase condition on the coating-forming surface in order to form a coating. The supply position of the starting material powder corresponding to the particle size of the powder is adjusted in the thermal spraying process so that the starting material powder is deposited with its interior in solid-phase condition and its surface-side in fluid-phase condition on the coating forming surface. The powder in the deposition- and coating forming process is cooled during forming the coating of back side of the substrate.