COMBINED LASER HYDROGEN TECHNOLOGY FOR HARDENING OF SURFACES OF DETAILS OF METALS AND ALLOYS Russian patent published in 2018 - IPC C21D1/78 C23C14/48 

FIELD: technological processes.

SUBSTANCE: invention relates to the field of technologies for hardening the surface layers of metal parts that combine laser and hydrogen technologies to create the hardening of surface layers of machine parts subjected to alternating loads, and can be used in the technology of manufacturing blades of compressors and turbines used in aircraft construction. Method for hardening the surface of a metal part involves treating the surface of the part with compression squeeze by sealing action with a shot and/or a laser beam, the saturation of the surface of the metal part with hydrogen in an amount providing the filling of all the concentrators of the beginning of microcracks, and after said treatment of the surface of the part by compression squeeze, the normalization of the metal part is carried out by barothermal treatment with hydrogen with heating at a temperature of 50–100 °C and a hydrogen pressure of 0.01–0.1 MPa with an exposure of 30–120 minutes. In particular embodiments of the invention, the surface treatment of the part by compression squeeze is carried out by sealing action by a laser beam in the form of a laser pulse.

EFFECT: reduction of residual tensile stresses on the surfaces of parts is ensured, which helps to reduce the generation of microcracks under conditions of force and heat action.

1 cl, 1 dwg