High-strength co-based alloy with enhanced workability and process for producing the same
| Foreign code | F110005229 |
|---|---|
| File No. | A281-07WO |
| Posted date | Aug 26, 2011 |
| Country | United States of America |
| Application number | 09874608 |
| Gazette No. | 20080185075 |
| Gazette No. | 8529710 |
| Date of filing | Apr 7, 2008 |
| Gazette Date | Aug 7, 2008 |
| Gazette Date | Sep 10, 2013 |
| Priority data |
|
| Title | High-strength co-based alloy with enhanced workability and process for producing the same |
| Abstract |
(US8529710) A Co-based alloy being useful as a spiral spring, common spring, wire, cable guide, steel belt, build-up material, guide wire, stent, catheter, etc. There is provided a Co-based alloy having a composition of Co-Al binary system containing 3-13% Al loaded with at least one workability enhancing element selected from among 001 to 50% Ni, 0.01 to 40% Fe and 0.01 to 30% Mn and having a lamellar structure wherein f.c.c. structure alpha-phase and beta(B2)-phase are repeated in layers. The lamellar structure is so regulated that the occupancy ratio of the whole structure is 30 vol. % or above and the layer spacing is 100 mum or less. The Co-based alloy may contain at least one optional component selected from among Ga, Cr, V, Ti, Mo, Nb, Zr, W, Ta, Hf, Si, Rh, Pd, Ir, Pt, Au, B, C and P may be added in a total amount of 0.01 to 60%. |
| Scope of claims |
[claim1] 1. A high-strength Co-based alloy produced by the steps of: dissolving a Co-based alloy having a composition that comprises, on the basis of mass percent, 3 to 13% of Al, and [claim2] 0.01 to 60% of one or more workability enhancing elements selected from the group consisting of 0.01 to 50% of Ni, 0.01 to 40% of Fe and 0.01 to 30% of Mn; solidifying with an average cooling rate of 50 to 200 deg. C/min in the range of 1500 to 600 deg. C.; and performing cold working at a working ratio of 10% or more; wherein the high-strength Co-based alloy has a metallic structure having a lamellar structure wherein a f.c.c. structure a-phase and beta (B2)-phase with an interlayer spacing of 100 mu m or less are repeated in layers and the occupancy ratio is 30% by volume or more. [claim3] 2. A high-strength Co-based alloy produced by the steps of: performing solution treatment at 1100 to 1300 deg. C. on a Co-based alloy having a composition that comprises, on the basis of mass percent, 3 to 13% of Al, and 01 to 60% of one or more workability enhancing elements selected from the group consisting of 0.01 to 50% of Ni, 0.01 to 40% of Fe and 0.01 to 30% of Mn; performing aging treatment at 550 to 750 deg. C.; and performing cold working at a working ratio of 10% or more; wherein the high-strength Co-based alloy has a metallic structure having a lamellar structure wherein a f.c.c. structure a-phase and beta (B2)-type phase with an interlayer spacing of 100 mu m or less are repeated in layers and the occupancy ratio of the lamellar structure to the whole metallic structure is 30% by volume or more. [claim4] 3. A high strength Co-based alloy produced by the steps of: dissolving a Co-based alloy having a composition that comprises, on the basis of mass percent, 3 to 13% of Al, [claim5] 0.01 to 60% of one more workability enhancing elements selected from the group consisting of 0.01 to 50% of Ni, 0.01 to 40% of Fe and 0.01 to 30% of Mn, and [claim6] 0.001% or more in total of at least one element selected from the group consisting of 0.01 to 40% of Cr, 0.01 to 30% of Mo, 0.01 to 5% of Si, 0.01 to 30% of W, 0.01 to 10% of Zr, 0.01 to 15% of Ta, 0.01 to 10% of Hf, 0.01 to 20% of Ga, 0.01 to 20% of V, 0.01 to 12% of Ti, 0.01 to 20% of Nb, 0.001 to 3% of C, 0.01 to 20% of Rh, 0.01 to 20% of Pd, 0.01 to 20% of Ir, 0.01 to 20% of Pt, 0.01 to 10% of Au, 0.001 to 1% of B, and [claim7] 0.001 to 1% of P in a total of 0.001 to 60%; solidifying with an average cooling rate of 50 to 200 deg. C/min in the range of 1500 to 600 deg. C.; and performing cold working at a working ratio of 10% of more; wherein the high-strength Co-based alloy has a lamellar structure wherein a f.c.c. structure alpha -phase and beta (B2)-type phase, a L12-type gamma ' phase, a D019-type precipitate, and/or a M23C6-type carbide with an interlayer spacing of 100 mu m or less are repeated in layers and the occupancy ratio of the lamellar structure to the whole metallic structure is 30% by volume or more. [claim8] 4. A high strength Co-based alloy produced by the steps of: performing solution treatment at 1100 to 1300 deg. C. on a Co-based alloy having a composition that comprises, on the basis of mass percent, 3 to 13% of Al, [claim9] 0.01 to 60% of one more workability enhancing elements selected from the group consisting of 0.01 to 50% of Ni, 0.01 to 40% of Fe and 0.01 to 30% of Mn, and [claim10] 0.001% or more in total of at least one element selected from the group consisting of 0.01 to 40% of Cr, 0.01 to 30% of Mo, 0.01 to 5% of Si, 0.01 to 30% of W, 0.01 to 10% of Zr, 0.01 to 15% of Ta, 0.01 to 10% of Hf, 0.01 to 20% of Ga, 0.01 to 20% of V, 0.01 to 12% of Ti, 0.01 to 20% of Nb, 0.001 to 3% of C, 0.01 to 20% of Rh, 0.01 to 20% of Pd, 0.01 to 20% of Ir, 0.01 to 20% of Pt, 0.01 to 10% of Au, 0.001 to 1% of B, and 0.001 to 1% of P in a total of 0.001 to 60%; solidifying with an average cooling rate of 50 to 200 deg. C/min in the range of 1500 to 600 deg. C.; performing aging treatment at 550 to 750 deg. C.; and performing cold working at a working ratio of 10% of more; wherein the high-strength Co-based alloy has a lamellar structure wherein a f.c.c. structure alpha -phase and beta (B2)-type phase, a L12-type gamma ' phase, a D019-type precipitate, and/or a M23C6-type carbide with an interlayer spacing of 100mu m or less are repeated in layers and the occupancy ratio of the lamellar structure to the whole metallic structure is 30% by volume or more. |
|
|
| IPC(International Patent Classification) |
|
| Reference ( R and D project ) | CREST The Innovation of Simulation Technology and the Construction of Foundations for Its Practical Use AREA |
※
Please contact us by E-mail or facsimile if you have any interests on this patent.
Contact Information for " High-strength co-based alloy with enhanced workability and process for producing the same "
- Japan Science and Technology Agency Department of Intellectual Property Management
- URL: http://www.jst.go.jp/chizai/
-
E-mail:
- Address: 5-3, Yonbancho, Chiyoda-ku, Tokyo, Japan , 102-8666
- Fax: 81-3-5214-8476
※ It is possible to retrieve in J-STORE by the same key word. → Retrieval result of J-STORE
