US3848847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting method for aluminum or aluminum alloys and a mold therefor
Assignee: Toyota Central R&D Labs Inc
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Filing: 1973-07-02
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Granted: 1974-11-19
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Expires: 1993-07-02
Abstract
Abstract A method of casting aluminum or aluminum alloys characterized by utilizing a mold of ferrous or ferrous alloy members having at least a portion of the mold surface provided with a carbide layer of at least one metal selected from the Group V, Subgroup a of the periodic table. In particular, the metal carbide layer can be a vanadium carbide, a niobium carbide, or a tantalum carbide, which layer is preferably a diffusion layer on the ferrous alloy mold member having a thickness in the range of 2 to 100 microns.
Inventors
- 👤 N Komatsu
- 👤 T Arai
- 👤 M Mizutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:41
CPC Classifications
B; B22; B22D; B22D21/00; B22D21/002; B22D21/007; B22C; B22C3/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
IN A MOLD FOR CASTING ALUMINUM OR ALUMINUM ALLOYS CMPRISING AT LEAST TWO MOLD MEMBERS HAVING MOLD SURFACES COACTING TO FORM A CAVITY FOR RECEIVING THE MOLTEN ALUMINUM OR ALUMINUM ALLOY, EACH OF SAID MOLD MEMBERS BEING OF A FERROUS METAL, THE IMPROVEMENT COMPRISING AT LEAST A PORTION OF THE MOLD SURFACE OF AT LEAST ONE MOLD MEMBER BEING A METAL CARBIDE LAYER OF AT LEAST ONE METAL BEING SELECTED FROM GROUP V, SUBGROUP A OF THE PERIODIC TABLE
Claim 2
Dependent Claim
79 words
IN A MOLD FOR CASTING ALUMINUM OR ALUMINUM ALLOYS CMPRISING AT LEAST TWO MOLD MEMBERS HAVING MOLD SURFACES COACTING TO FORM A CAVITY FOR RECEIVING THE MOLTEN ALUMINUM OR ALUMINUM ALLOY, EACH OF SAID MOLD MEMBERS BEING OF A FERROUS METAL, THE IMPROVEMENT COMPRISING AT LEAST A PORTION OF THE MOLD SURFACE OF AT LEAST ONE MOLD MEMBER BEING A METAL CARBIDE LAYER OF AT LEAST ONE METAL BEING SELECTED FROM GROUP V, SUBGROUP A OF THE PERIODIC TABLE
Claim 3
Dependent Claim
14 words
In a mold according to claim 1, wherein the metal carbide is vanadium carbide.
Claim 4
Dependent Claim
15 words
In a mold according to claim 1, wherein the metal carbide is a niobium carbide.
Claim 5
Dependent Claim
14 words
In a mold according to claim 1, wherein the metal carbide is tantalum carbide.
Claim 6
Dependent Claim
16 words
In a mold according to claim 1, wherein said metal carbide layer is a diffusion layer.
Claim 7
Dependent Claim
25 words
In a mold according to claim 1, wherein said mold members include at least one core pin having a surface layer of said metal carbide.
Claim 8
Dependent Claim
22 words
In a mold according to claim 1, wherein the entire surface of the mold members are provided with said metal carbide layer.
Claim 9
Dependent Claim
23 words
In a mold according to claim 1, wherein said metal carbide layer has a thickness in the range of 2 to 100 microns.
Claim 10
Dependent Claim
94 words
In a method of casting molten aluminum or aluminum alloys comprising providing a casting mold formed of at least two mold members of a ferrous alloy having surfaces coacting to form a mold cavity, pouring the molten aluminum or aluminum alloys into the mold cavity, and allowing the molten metal to solidify, the improvement comprising using a casting mold having a portion of the surface of the mold members forming the mold cavity provided with a metal carbide layer of at least one metal selected from Group V, Subgroup a of the periodic table.
Claim 11
Dependent Claim
94 words
In a method of casting molten aluminum or aluminum alloys comprising providing a casting mold formed of at least two mold members of a ferrous alloy having surfaces coacting to form a mold cavity, pouring the molten aluminum or aluminum alloys into the mold cavity, and allowing the molten metal to solidify, the improvement comprising using a casting mold having a portion of the surface of the mold members forming the mold cavity provided with a metal carbide layer of at least one metal selected from Group V, Subgroup a of the periodic table.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |