Iron-Nickel-Cobalt Alloy
Use of an iron-nickel-cobalt alloy in CFC mould construction comprising (in % by mass) Ni from 30 to 35%, Co from 3 to 6%, Al from 0.001 to 0.1%, Mn from 0.005 to 0.5%, Si from 0.005 to 0.5%, C max. 0.1%, balance Fe and constituents resulting from production, with the alloy having a mean coefficient of thermal expansion in the temperature range from 20 to 200 DEG C of <2.0 OE10<−6>/K.
1 . A method comprising fabricating a mold from materials comprising an iron-nickel-cobalt alloy and producing an object of carbon-fiber reinforced composite in the mold, the alloy comprising, in % by weight:
Ni
30 to 35%
Co
3 to 6%
Al
0.001 to 0.1%
Mn
0.005 to 0.5%
Si
0.005 to 0.5%
C
max. 0.1%
remainder Fe and impurities, the alloy having a mean thermal expansion coefficient of <2.0×10 −6 /K in a temperature range from 20 to 200° C.
2 . Method in accordance with claim 1 , wherein the Ni content of the alloy is 32.0 to 34.5%, in % by weight.
3 . Method in accordance with claim 1 , wherein the Ni content of the alloy is 32.5 to 33.5%, in % by weight.
4 . Method in accordance with claim 1 , wherein the alloy comprises in % by weight:
Ni
32.5 to 34.5%
Co
>3.0 to 5.5%
Al
0.001 to 0.5%
Mn
0.005 to 0.1%
Si
0.005 to 0.1%
C
0.005 to 0.05%
remainder Fe and impurities, the alloy having a mean thermal expansion coefficient of <1.5×10 −6 /K in a temperature range from 20 to 200° C.
5 . Method in accordance with claim 1 , wherein the alloy comprises the following maximum contents of the following elements, in % by weight:
Cr
max. 0.1%
Mo
max. 0.1%
Cu
max. 0.1%
Ti
max. 0.1%
Mg
max. 0.005%
B
max. 0.005%
N
max. 0.006%
O
max. 0.003%
S
max. 0.005%
P
max. 0.008%
Ca
max. 0.005%
Zr
max. 0.05%
6 . A method, comprising fabricating a mold from materials comprising an iron-nickel-cobalt alloy and producing an object of carbon-fiber reinforced composite in the mold, the alloy comprising, in % by weight:
Ni
32.5 to 34.5%
Co
>3.5 to <4.5%
Mo
max. 0.05%
Cr
max. 0.05%
C
max. 0.009%
Mn
max. 0.04%
Si
max. 0.03%
S
max. 0.003%
N
max. 0.004%
Ti
max. 0.01%
Cu
max. 0.05%
P
max. 0.005%
Al
0.001 to 0.05%
Mg
max. 0.0008%
Ca
max. 0.0003%
Zr
max. 0.05%
O
max. 0.006%
remainder Fe and impurities, the alloy having a mean thermal expansion coefficient of <1.3×10 −6 /K in a temperature range from 20 to 200° C.
7 . Method in accordance with claim 1 or 4 , wherein the alloy further comprises 0.001 to 0.1%, in % by weight, Nb.
8 . Method in accordance with claim 1 or 4 , wherein the alloy from which the mold is fabricated comprises sheet material, strip material, or tube material.
9 . Method in accordance with claim 1 or 4 , wherein the alloy from which the mold is fabricated comprises wire and the fabricating of the mold comprises welding with the wire comprised of the alloy.
10 . Method in accordance with claim 1 or 4 , wherein the object comprises an aircraft part.
11 . Method in accordance with claim 1 or 4 , wherein the alloy from which the mold is fabricated is in the form of forged stock.
12 . Method in accordance with claim 1 or 4 , wherein the alloy from which the mold is fabricated is in the form of cast stock.