Solder alloy, use of the solder alloy and method for processing, particularly repairing, workpieces, particularly gas turbine components

Abstract

A solder alloy and a multi-component soldering system, to the use of the same, and to a method for repairing gas turbine components are described herein. The solder alloy based on nickel includes the following elements: nickel (Ni), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), tantalum (Ta), niobium (Nb), yttrium (Y), hafnium (Hf), palladium (Pd), boron (B) and silicon (Si). The multi-component soldering system includes the solder alloy and additionally at least one additive material. The additive materials include the following elements: nickel (Ni), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), tantalum (Ta), titanium (Ti), rhenium (Re), iron (Fe), niobium (Nb), yttrium (Y), hafnium (Hf), palladium (Pd), carbon (C), zirconium (Zr), boron (B) and silicon (Si). A specific mixing of solder alloy and additive materials produces a multi-component soldering system that may be specifically adapted to the material of the component to be repaired, the mixture ratio of solder alloy and additive materials being freely selectable. The repair method is based on high-temperature diffusion soldering using the solder alloy hereof or the multi-component soldering system hereof.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a solder alloy as well as a multi-component soldering system. Furthermore, the present invention relates to the use of a solder alloy and of a multi-component soldering system as well as to a method for processing, e.g., repairing, workpieces, e.g., of gas turbine components. BACKGROUND INFORMATION [0002] Gas turbines, as for example aircraft engines or stationary gas turbines, in operation are subject to high mechanical and thermal stress. Thus, during the operation of an aircraft engine, blades, e.g., turbine blades, may be damaged by alternating thermal stress and material removal. This results in thermal fatigue cracks and eroded surfaces, which must be completely and reliable repaired when servicing or repairing the aircraft engine. For this purpose, conventionally, soldering methods are used in addition to welding methods. [0003] In this connection, conventionally, soldering methods and solder materials are uses as...

AI Technical Summary

Benefits of technology

"The present invention provides a new solder alloy and a multi-component soldering system that can be used for repairing and processing gas turbine components. The solder alloy includes a combination of chromium, cobalt, molybdenum, and nickel, and may also include palladium, boron, yttrium, hafnium, and niobium. The solder alloy has a lower melting point than traditional solder alloys, which makes it easier to melt and cast. The addition of tantalum, niobium, and aluminum can further strengthen the γ-nickel matrix, while the addition of palladium and boron can improve the wetting behavior and fluidity of the solder alloy. The solder alloy can also be combined with yttrium and hafnium to further improve its properties. The melting point of the solder alloy can be lowered by adding silicon. Overall, the present invention provides a new and improved solution for repairing and processing gas turbine components."

Problems solved by technology

Gas turbines, as for example aircraft engines or stationary gas turbines, in operation are subject to high mechanical and thermal stress.

Thus, during the operation of an aircraft engine, blades, e.g., turbine blades, may be damaged by alternating thermal stress and material removal.

This results in thermal fatigue cracks and eroded surfaces, which must be completely and reliable repaired when servicing or repairing the aircraft engine.