Sätt att utveckla resttryckspänning i rostfritt stål och nickelbaserade varmhållfasta legeringar samt reparation av utav spänningskorrosion framkallade sprickor genom svetsning under vattnet

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.