IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0115746
(2008-05-06)
|
등록번호 |
US-7851067
(2011-02-10)
|
우선권정보 |
AT-A 707/2007(2007-05-08) |
발명자
/ 주소 |
- Caliskanoglu, Devrim
- Mitterer, Christian
|
출원인 / 주소 |
|
대리인 / 주소 |
Greenblum & Bernstein, P.L.C.
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
5 |
초록
▼
A coated metal article such as, e.g., a tool, which article comprises a body part comprising a substantially carbon-free precipitation-hardened iron-cobalt-molybdenum/tungsten-nitrogen alloy and carries a coating. The coating has been applied by a PVD method and/or a CVD method and comprises a subst
A coated metal article such as, e.g., a tool, which article comprises a body part comprising a substantially carbon-free precipitation-hardened iron-cobalt-molybdenum/tungsten-nitrogen alloy and carries a coating. The coating has been applied by a PVD method and/or a CVD method and comprises a substantially single-phase crystalline, cubic face-centered structure. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
대표청구항
▼
What is claimed is: 1. A coated metal article, wherein the article comprises a body part comprising a substantially carbon-free precipitation-hardened alloy which comprises iron, cobalt, at least one of molybdenum and tungsten, and at least 0.005% by weight of nitrogen and wherein the article carri
What is claimed is: 1. A coated metal article, wherein the article comprises a body part comprising a substantially carbon-free precipitation-hardened alloy which comprises iron, cobalt, at least one of molybdenum and tungsten, and at least 0.005% by weight of nitrogen and wherein the article carries a coating which has been applied by at least one of a PVD method and a CVD method and comprises a substantially single-phase crystalline, cubic face-centered structure. 2. The article of claim 1, wherein the article is a tool. 3. The article of claim 2, wherein the tool is suitable for cutting metals. 4. The article of claim 1, wherein the body part comprises an alloy which comprises, in % by weight: Co from about 15.0 to about 30.0 Mo up to about 20.0 W up to about 25.0 (Mo + W/2) from about 10.0 to about 22.0 N from 0.005 to about 0.12 remainder iron (Fe) and production-related impurities. 5. The article of claim 4, wherein the alloy comprises, in % by weight: Co from about 20.0 to about 30.0 Mo from about 11.0 to about 19.0 N from 0.005 to about 0.12 Si from about 0.1 to about 0.8 Mn from about 0.1 to about 0.6 Cr from about 0.02 to about 0.2 V from about 0.02 to about 0.2 W from about 0.01 to about 0.9 Ni from about 0.01 to about 0.5 Ti from about 0.001 to about 0.2 (Nb and/or Ta) from about 0.001 to about 0.1 Al from 0 to about 0.043 C from 0 to about 0.09 P from 0 to not more than about 0.01 S from 0 to not more than about 0.02 O from 0 to not more than about 0.032 remainder iron (Fe) and production-related impurities. 6. The article of claim 5, wherein a ratio of concentrations of cobalt to molybdenum (Co/Mo) has a value of from about 1.3 to about 1.9. 7. The article of claim 6, wherein the ratio has a value of from about 1.5 to about 1.8. 8. The article of claim 5, wherein one or more of the following elements are present in the alloy in the following concentrations (% by weight): Co from about 24.0 to about 27.0 Mo from about 13.5 to about 17.5 N from about 0.008 to about 0.01 Si from about 0.2 to about 0.6 Mn from about 0.1 to about 0.3 Cr from about 0.03 to about 0.07 V from about 0.025 to about 0.06 W from about 0.03 to about 0.08 Ni from about 0.09 to about 0.2 Ti from about 0.003 to about 0.009 (Nb and/or Ta) from about 0.003 to about 0.009 Al from about 0.001 to about 0.009 C from about 0.01 to about 0.07 P not more than about 0.008 S not more than about 0.015. 9. The article of claim 1, wherein the body part has been made by using a powder metallurgical method. 10. The article of claim 9, wherein the body part has been produced by a method which comprises a hot forming of an ingot which has been subjected to hot isostatic pressing (HIP) with a degree of deformation of at least about 2.5-fold. 11. The article of claim 1, wherein the body part has a hardness of higher than about 66 HRC. 12. The article of claim 11, wherein the hardness is higher than about 67 HRC. 13. The article of claim 1, wherein a nitrogen concentration in the alloy increases toward a surface of the body part. 14. The article of claim 1, wherein the coating has a thickness of at least about 0.8 μm. 15. The article of claim 1, wherein more than about 70% by volume of the coating are comprised of at least one layer having a substantially single-crystalline cubic face-centered structure. 16. The article of claim 15, wherein the coating is comprised of more than one layer having a substantially single-crystalline cubic face-centered structure. 17. The article of claim 15, wherein more than about 85% by volume of the coating are comprised of the at least one layer. 18. The article of claim 15, wherein the at least one layer has a composition of general formula (ΣMexAly)N wherein x has a value of from about 0.25 to about 0.50, y has a value of from about 0.50 to about 0.75 and ΣMe comprises at least one element of Groups 4, 5 and 6 of the Periodic Table of Elements. 19. The article of claim 18, wherein x has a value of from about 0.28 to about 0.35 and y has a value of from about 0.65 to about 0.72. 20. The article of claim 18, wherein the at least one layer has a composition of general formula (CrxAly)N wherein x has a value of up to about 0.3 and y has a value of up to about 0.7. 21. The article of claim 18, wherein the at least one layer has a composition of general formula (TixAly)N wherein x has a value of up to about 0.33 and y has a value of up to about 0.67. 22. The article of claim 15, wherein at least a part of the coating comprises a metal oxide coating of substantially the composition (Cr+Al)2O3 and comprises an alpha or kappa structure.
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