| 摘要 |
PROBLEM TO BE SOLVED: To provide a warm shot peening method for a thick steel plate, remarkably improving the fatigue strength more than before even in the case of using an existing projection device. SOLUTION: This invention has developed a new warm shot peening method for a thick steel plate. The method adopts a centrifugal type projection device as a projection means for the iron particles when a number of iron particles are caused to collide with the surface of the thick steel plate at high speed, and in the state where the temperature of the thick steel plate is kept at 200 to 700°C, the iron particles are caused to collide with it only for 0.5 to 2 minutes. The thick steel plate may be heated using a heat treatment device disposed in a hot rolling line for the thick steel plate. COPYRIGHT: (C)2007,JPO&INPIT
|
