Solder material for soldering components
View Patent ↗The invention relates to a method for repairing components that consist of superalloys, in particular for repairing components that consist of a superalloy with an aligned microstructure in such a way that the repaired site likewise has an aligned microstructure. The method comprises the following steps: a solder material is applied to the repair site; the repair site with the applied solder material is heated until the latter melts; and the melted solder material is left to solidify. The solder material is an alloy with the same alloy components as the component alloy. At least the fraction of one alloy component in the solder material composition is modified in relation to the fraction of that alloy component in the component alloy composition, in such a way that the melting temperature of the solder material is reduced in relation to the melting temperature of the component alloy.
1. A solder material for soldering superalloy components having a directional microstructure, comprising:
an alloy having
alloy constituents that are the same as an alloy of the component and
a proportion of an alloy constituent in the composition of the solder material modified relative to its proportion in the composition of the alloy of the component such that the melting temperature of the solder material is lowered relative to the melting temperature of the alloy of the component,
wherein the alloy constituent includes at least one of the elements Al, Ti, Ta, Nb, and W,
wherein the proportion of at least one of the elements Al and Ti is increased relative to the proportion in the superalloy and/or
the proportion of the element W in the alloy of the solder material is reduced relative to its proportion in the superalloy;
wherein the superalloy has the following composition:
from 2 to 16 wt. % Cr
from 0 to 15 wt. % Co
from 0 to 3 wt. % Mo
from 0 to 10 wt. % W
from 0 to 12 wt. % Ta
from 0 to 6 wt. % Re
from 0 to 1 wt. % V
from 0 to 0.5 wt. % Nb
from 0.05 to 6.5 wt. % Al
from 0 to 5 wt. % Ti
from 0 to 0.2 wt. % Hf
from 0 to 0.07 wt. % C
remainder Ni, and
the proportions of Al and/or Ta and/or Ti in the alloy of the solder material are increased relative to the composition of the superalloy.
2. A solder material for soldering superalloy components having a directional microstructure, comprising:
an alloy having
the same alloy constituents as the alloy of the component and
a proportion of an alloy constituent in the composition of the solder material modified relative to its proportion in the composition of the alloy of the component such that the melting temperature of the solder material is lowered relative to the melting temperature of the alloy of the component,
wherein the superalloy is a nickel- or cobalt-based superalloy, and it additionally comprises at least one of the elements Al, Ti, Ta, Cr, Co, Mo, W, and Nb as main alloy elements, and
wherein the proportion of at least one of the elements Al, Ti, Ta, and Nb in the alloy of the solder material is increased relative to its proportion in the superalloy and/or the proportion of the element W in the alloy of the solder material is reduced relative to its proportion in the superalloy;
wherein the superalloy has the following composition:
from 2 to 16 wt. % Cr
from 0 to 15 wt. % Co
from 0 to 3 wt. % Mo
from 0 to 10 wt. % W
from 0 to 12 wt. % Ta
from 0 to 6 wt. % Re
from 0 to 1 wt. % V
from 0 to 0.5 wt. % Nb
from 0.05 to 6.5 wt. % Al
from 0 to 5 wt. % Ti
from 0 to 0.2 wt. % Hf
from 0 to 0.07 wt. % C
remainder Ni, and
the proportions of Al and/or Ta and/or Ti in the alloy of the solder material are increased relative to the composition of the superalloy.