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High-strength co-based alloy with enhanced workability and process for producing the same

外国特許コード F110005229
整理番号 A281-07WO
掲載日 2011年8月26日
出願国 アメリカ合衆国
出願番号 09874608
公報番号 20080185075
公報番号 8529710
出願日 平成20年4月7日(2008.4.7)
公報発行日 平成20年8月7日(2008.8.7)
公報発行日 平成25年9月10日(2013.9.10)
優先権データ
  • 2006WO-JP320688 (2006.10.11) WO
発明の名称 (英語) High-strength co-based alloy with enhanced workability and process for producing the same
発明の概要(英語) (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%.
特許請求の範囲(英語) [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.
  • 発明者/出願人(英語)
  • ISHIDA KIYOHITO
  • YAMAUCHI KIYOSHI
  • KAINUMA RYOSUKE
  • SUTOU YUJI
  • OMORI TOSHIHIRO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
参考情報 (研究プロジェクト等) CREST The Innovation of Simulation Technology and the Construction of Foundations for Its Practical Use AREA
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