PROCESS FOR TREATING A WALL IN AUSTENITIC STAINLESS STEEL AND PERCUSSION APPARATUS FOR APPLYING THIS PROCESS

摘要

P Process for treating an austenic steel wall. The metal is hardened using a percussion device, the tool of which is finished, or a spherical part made of very hard steel, the diameter of which is greater than 2 mm, preferably between 6 and 8 mm, the tool being directed perpendicular to the wall. /P P Percussion device provided with such a tool making it possible to apply the method according to the invention. /P P The metal presents, especially in the underlying layers of the skin, compressive stresses, which makes it possible, in the presence of corrosive agents and of service tensile stresses, to avoid the risks cracking of this metal. Application in large pipes used in the nuclear industry. /P