Method and apparatus for improving the distribution of...

B - Operations – Transporting – 23 – P

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Details

B23P 9/02 (2006.01) B21D 31/06 (2006.01) B24B 39/00 (2006.01) B24C 1/10 (2006.01) C21D 7/04 (2006.01) C22F 1/00 (2006.01)

Patent

CA 2664354

A surface treatment element having a textured surface with a plurality of deforming features is pressed against the surface of an article to induce deep and shallow layers of compressive residual stress to form a continuous layer of compressive residual stress extending from the surface to a depth beneath the surface. A method whereby a surface treatment apparatus is pressed into the surface of the apparatus to cause Hertzian loading thereby inducing a deep, high magnitude compressive residual stress below the surface. The deforming features of the surface treatment element cause the lateral displacement of material on the surface of the article thereby cold working the surface and providing a more shallow layer of compressive residual stress at the surface.

Selon l'invention, on comprime un élément de traitement de surface possédant une surface texturée munie d'une pluralité d'éléments déformants contre la surface d'un article afin de produire des couches profondes et peu profondes de contrainte de compression résiduelle, destinées à former une couche de contrainte de compression résiduelle continue s'étendant depuis la surface jusqu'à une profondeur sous la surface. L'invention porte sur un procédé qui permet de comprimer un appareil de traitement de surface contre la surface de l'article afin de provoquer un chargement hertzien induisant une contrainte de compression résiduelle profonde de grande amplitude sous la surface. Les éléments déformants de l'élément de traitement de surface entraînent un déplacement latéral de matière à la surface de l'article, réalisant de la sorte un écrouissage ladite surface et constituant une couche moins profonde de contrainte de compression résiduelle en surface.

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