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US 11,114,226 B2Granted
Ultra-low cobalt iron-cobalt magnetic alloys
AssigneeCarpenter Technology Corporation
InventorsTanjore V. Jayaraman, Chins Chinnasamy, Samuel Kernion, Eric Fitterling
Life of this patent
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Abstract
A magnetic iron alloy and process of making the same. The alloy includes iron, approximately 2 wt. % to approximately 8 wt. % cobalt, approximately 0.05 wt. % to approximately 5 wt. % manganese, and approximately 0.05 wt. % to approximately 5 wt. % silicon. The alloy may also include up to approximately 0.3 wt. % chromium, up to approximately 2 wt. % vanadium, up to approximately 1 wt. % nickel, up to approximately 0.05 wt. % niobium, and up to approximately 0.02 wt. % carbon.
Claims14
A magnetic isotropic iron alloy comprising:
- Iron (Fe);
- cobalt (Co) from greater than 5 wt % to approximately 8 wt. %;
- approximately 0.05 wt. % to approximately 5 wt. % manganese (Mn);
- approximately 1.3 wt. % to approximately 5 wt. % silicon (Si);
- chromium, up to approximately 0.3 wt. %;
- vanadium, up to approximately 2 wt. %;
- copper, up to approximately 0.05 wt. %;
- and
- gadolinium (Gd) from 0.11 wt % to approximately 0.15 wt %.
6 more elements
A magnetic iron alloy comprising:
- iron;
- cobalt from greater than 5 wt. % to approximately 8 wt. %;
- approximately 0.05 wt. % to approximately 5 wt. % manganese;
- approximately 1.3 wt. % to approximately 5 wt. % silicon,
- chromium, up to approximately 0.3 wt. %;
- vanadium, up to approximately 2 wt. %;
- copper, up to approximately 0.05 wt. %;
- and
- gadolinium (Gd) from 0.11 wt % to approximately 0.15 wt %,
- wherein the alloy has a ρ of at least approximately 40 μΩcm, a Bs of at least approximately 20 kG, and a Hc of less than approximately 2 Oe.
7 more elements
Dependencies are inferred from the claim text.