Low heat input welding repair process for Ni based superalloys

摘要

The present invention is to provide a growth welding technique of a gas turbine blade made of unidirectional solidification and a single crystal vacuum precision casting technique using a nickel-based single crystal superalloy and a bonding pretreatment technique using a fluorine ion cleaning device.;That is, in the present invention, the weldability of the joint can be improved by removing and depleting the oxides of Al, Cr and Ti, which reduce the formation factor and the weldability of the gamma prime phase, by the fluorine ion treatment process, and perform the solution heat treatment to form the base material. The nickel group which can make the crystallization of the directional solidification alloy for the welded part by combining the low current heat input micro welding device with the device capable of cooling the welded material by improving the weldability by making the state most suitable for weldability. It is to provide a low heat input welding repair method for super heat resistant alloys.;GTAW, TIG, Nickel-based, Super Heat-resistant Alloy, Low Current, Micro Plasma, Solvent, Fluorine Ion, Cleaning Process, Cooling Device, Low Heat Input