way to weld under water to develop resttryckspu00e4nningar in stainless steel and nickel bases varmhu00e5llfasta alloys and method and device for using this method to repair the cracks to follow(d) of spu00e4nningskorrosion

摘要

The method concerns development of compressive residual stresses in corrosion resistant steels and superalloys on nickel basis. It consists of producing a bath of molten metal, cooling the bath to build a metallurgical bond with adjoining solid metal, and quenching the bonded metal to the temperature of the surroundings below the melting zone of the metal through contact with a quenching medium. Also claimed are a method for repair of damage caused stress corrosion cracks, and a corresponding apparatus.