Method and apparatus for providing a layer of compressive...

Details Method and apparatus for providing a layer of compressive... Method and apparatus for providing a layer of compressive...

B - Operations, Transporting

24

C

B24C 1/10 (2006.01) C21D 7/06 (2006.01)

Patent

CA 2479373

The shot peening method and apparatus (Fig. 13) of the present invention utilizes control of the shot peening coverage to provide higher surface compression and comparable depth of compression to conventional 100% coverage peening but with reduced cold working providing improved thermal stability and reduction in shot peening time and cost. A preferred embodiment of this invention employs x-ray diffraction (Fig. 13) residual stress and percent cold work determinated by line broadening to establish the optimal degree of coverage for a given material and shot peening intensity.

L'invention concerne un procédé et un appareil de grenaillage de précontrainte, qui utilise le réglage de la couverture du grenaillage de précontrainte pour adapter une compression superficielle supérieure et une profondeur de compression comparable à un grenaillage classique de couverture intégrale, mais avec un écrouissage réduit, ce qui améliore la stabilité thermique et réduit le temps et le coût du grenaillage de précontrainte. Un mode préféré de l'invention met en oeuvre une contrainte résiduelle d'une cristallographie par rayons X et un taux d'écrouissage déterminés par élargissement des lignes pour établir le degré optimal de couverture pour un matériau donné et l'intensité du grenaillage de précontrainte.

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