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Cr-based alloy excellent in balance between strength and ductility at high temperature

外国特許コード F110005109
整理番号 A061-09US
掲載日 2011年8月23日
出願国 アメリカ合衆国
出願番号 92660000
公報番号 7037467
出願日 平成12年5月26日(2000.5.26)
公報発行日 平成18年5月2日(2006.5.2)
国際出願番号 JP2000003399
国際公開番号 WO2000073523
国際出願日 平成12年5月26日(2000.5.26)
国際公開日 平成12年12月7日(2000.12.7)
優先権データ
  • 特願1999-148326 (1999.5.27) JP
  • 2000WO-JP03399 (2000.5.26) WO
発明の名称 (英語) Cr-based alloy excellent in balance between strength and ductility at high temperature
発明の概要(英語) (US7037467)
A strength-ductility balance at a high temperature above 1000° C., particularly a high temperature above 1050° C. is improved by rendering a chemical composition of Cr-based alloy into Cr: not less than 60 mass %, C+N: not more than 20 mass ppm, S: not more than 20 mass ppm, O: not more than 100 mass ppm, O as an oxide: not more than 50 mass ppm, and the remainder being Fe and inevitable impurities.
特許請求の範囲(英語) [claim1]
1. A Cr-based alloy having an excellent strength-ductility balance at higher temperature, comprising Cr: not less than 65 mass %, C+N: not more than 20 mass ppm, S: not more than 20 mass ppm, O not more than 100 mass ppm, O as an oxide: not more than 50 mass ppm, and the remainder being Fe and inevitable impurities.
[claim2]
2. A Cr-based alloy according to claim 1, having a strength-ductility balance of RA.TS >= 10000 (%.MPa) at higher than 1000 deg. C.
[claim3]
3. A Cr-based alloy described in claim 1, having strength-ductility balance of RA.TS >= 10000 (%.MPa) at 1050 deg. C.–
1200 deg. C.
[claim4]
4. A process of making an alloy as described in claim 1, wherein a starting material of chromium has not less than 99.9% of purity.
[claim5]
5. The process according to claim 4, wherein a starting material of iron is a super-high purity electrolytic iron with a purity of 99.998%.
[claim6]
6. The process according to claim 4 comprising a skull melting process using a water-cooled copper crucible.
  • 発明者/出願人(英語)
  • ABIKO KENJI
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 420/428
  • 148/423
参考情報 (研究プロジェクト等) CREST Phenomena of Extreme Conditions AREA
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