High-strength, soft-magnetic iron-cobalt-vanadium alloy
View Patent ↗A high-strength, soft-magnetic iron-cobalt-vanadium alloy selection is proposed, consisting of 35.0≦Co≦55.0% by weight, 0.75≦V≦2.5% by weight, O≦Ta+2×Nb≦0.8% by weight, 0.3<Zr≦1.5% by weight, remainder Fe and melting-related and/or incidental impurities. This zirconium-containing alloy selection has excellent mechanical properties, in particular a very high yield strength, high inductances and particularly low coercive forces. It is eminently suitable for use as a material for magnetic bearings used in the aircraft industry.
1. A high-strength, soft-magnetic iron-cobalt-vanadium alloy, consisting of:
35≦Co≦55% by weight,
0.75≦V≦2.5% by weight,
0≦(Ta+2×Nb)≦1% by weight,
0.5<Zr≦1% by weight,
Ni≦5% by weight,
remainder Fe and melting-related and/or incidental impurities.
2. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the zirconium content is 0.6≦Zr≦0.8% by weight.
3. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , in the form of a magnetic bearing.
4. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , in the form of a rotor.
5. A high strength, soft-magnetic iron-cobalt-vanadium alloy, consisting of:
45≦Co≦50% by weight,
1≦V≦2% by weight,
0.04≦(Ta+2×Nb)≦0.8% by weight,
0.5≦Zr≦1% by weight,
Ni≦1% by weight,
remainder Fe and melting-related and/or incidental impurities.
6. The high strength, soft-magnetic iron-cobalt-vanadium alloy of claim 5 , wherein the content of melting-related and/or incidental metallic impurities is:
Cu≦0.2, Cr≦0.3, Mo≦0.3,
Si≦0.5, Mu≦0.3, and Al≦0.3.
7. A high strength, soft-magnetic iron-cobalt-vanadium alloy, consisting of:
48≦Co≦50% by weight,
1.5≦V≦2% by weight,
0.04≦(Ta+2×Nb)≦0.5% by weight,
0.6≦Zr≦0.8% by weight,
Ni≦0.5% by weight,
remainder Fe and melting-related and/or incidental impurities.
8. The high strength, soft-magnetic iron-cobalt-vanadium alloy of claim 7 , wherein the content of melting-related and/or incidental metallic impurities is:
Cu≦0.1, Cr≦0.2, Mo≦0.2,
Si≦0.2, Mu≦0.2 and Al≦0.2.
9. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the cobalt content is between 45≦Co≦50% by weight.
10. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the cobalt content is between 48≦Co≦50% by weight.
11. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the vanadium content is between 1≦V≦2% by weight.
12. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the vanadium content is between 1.5≦V≦2% by weight.
13. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the niobium and/or tantalum content is between 0.04≦(Ta+2×Nb)≦0.8% by weight.
14. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the niobium and/or tantalum content is between 0.04≦(Ta+2×Nb)≦0.5% by weight.
15. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , in which the niobium and/or tantalum content is between 0.04≦(Ta+2×Nb)≦0.3% by weight.
16. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the nickel content is Ni≦1% by weight.
17. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the nickel content is Ni≦0.5% by weight.
18. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the content of melting-related and/or incidental metallic impurities is
Cu≦0.2Cr≦0.3, Mo≦0.3, Si≦0.5, Mn≦0.3 and Al≦0.3.
19. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the content of melting-related and/or incidental metallic impurities is
Cu≦0.1Cr≦0.2, Mo≦0.2, Si≦0.2, Mn≦0.2 and Al≦0.2.
20. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the content of melting-related and/or incidental metallic impurities is
Cu≦0.06, Cr≦0.1, Mo≦0.1, Si≦0.1 and Mn≦0.1.
21. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the content of melting-related and/or incidental nonmetallic impurities is P≦0.01, S≦0.02, N≦0.005, O≦0.05 and C≦0.05.
22. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the content of melting-related and/or incidental nonmetallic impurities is P≦0.005, S≦0.01, N≦0.002, O≦0.02 and C≦0.02.
23. The high-strength, soft-magnetic iron-cobalt-vanadium alloy as claimed in claim 1 , wherein the content of melting-related and/or incidental nonmetallic impurities is S≦0.005, N≦0.001, O≦0.01 and C≦0.01.