| 摘要 |
PURPOSE:To form a thermal spraying film using wire rod as raw material on surface of the aimed base material under excellent thermal spraying efficiency by making double of gas injection holes in a gas injection nozzle for blowing off molten material of the wire rod and independently controlling each gas pressure in the laser beam thermal spraying method using the wire rod as the thermal spraying material. CONSTITUTION:From the center hole 2 in the nozzle 1 for the laser beam thermal spraying provided with feeding hole 2 for metal wire 8 at the center as the raw material for thermal spraying, an inside gas nozzle 3 and outside gas nozzle 4 at the outer circumference thereof, the metal wire 8 is fed out as the thermal spraying material and momentarily melted with high energy density part in the laser beam 7 condensed at near the outlet part with a lens, etc. The molten metal wire material is pulverized as fine particle state with the injection gas from the inside nozzle 3 and flown in conical state 11 to form the thermal spraying film 10 on the surface of base material 9. At the same time, the gas is separately injected from the outside nozzle 4, and spreading angle 2theta in the conical shape in the thermal-spraying fine particles is made to small and the thermal spraying fine particles are concentrated on the necessary thermal spraying part in the base plate 9 to form the thermal spraying film 10 with the good thermal spraying efficiency. |
