SHOT-PEENING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a shot-peening method capable of suppressing diffusion of contaminants peeled from an object of peening.SOLUTION: A chamber 2 which is provided with a water flow generation device 6 and fitted with a mesh 8 inside is pressed against a surface of a peening object 11. A rotary vane 6a of the water flow generation device 6 arranged in a region 30B between the mesh 8 and the chamber 2 in the chamber 2 is rotated to generate a water flow 9 flowing toward the peening object 11 in a region 30A in the chamber 2 on the side of the peening object 11 rather than on the side of the mesh 8. A plurality of shots 4 filled in the region 30A move toward the peening object 11 together with the water flow 9 to strike on a surface of the peening object 11. After striking, the shots 4 move toward the mesh 8 accompanying the water flow 9. The surface of the peening object 11 that the shots 4 have struck on is given compressive residual stress.