Creep resistant high temperature martensitic steel
Abstract
The disclosure provides a creep resistant alloy having an overall composition comprised of iron, chromium, molybdenum, carbon, manganese, silicon, nickel, vanadium, niobium, nitrogen, tungsten, cobalt, tantalum, boron, copper, and potentially additional elements. In an embodiment, the creep resistant alloy has a molybdenum equivalent Mo(eq) from 1.475 to 1.700 wt. % and a quantity (C+N) from 0.145 to 0.205. The overall composition ameliorates sources of microstructural instability such as coarsening of M.sub.23C.sub.6carbides and MX precipitates, and mitigates or eliminates Laves and Z-phase formation. A creep resistant martensitic steel may be fabricated by preparing a melt comprised of the overall composition followed by at least austenizing and tempering. The creep resistant alloy exhibits improved high-temperature creep strength in the temperature environment of around 650.degree. C.
- Inventors:
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1342097
- Patent Number(s):
- 9556503
- Application Number:
- 14/871,774
- Assignee:
- U.S. Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2015 Sep 30
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Hawk, Jeffrey A., Jablonski, Paul D., and Cowen, Christopher J. Creep resistant high temperature martensitic steel. United States: N. p., 2017.
Web.
Hawk, Jeffrey A., Jablonski, Paul D., & Cowen, Christopher J. Creep resistant high temperature martensitic steel. United States.
Hawk, Jeffrey A., Jablonski, Paul D., and Cowen, Christopher J. Tue .
"Creep resistant high temperature martensitic steel". United States. https://www.osti.gov/servlets/purl/1342097.
@article{osti_1342097,
title = {Creep resistant high temperature martensitic steel},
author = {Hawk, Jeffrey A. and Jablonski, Paul D. and Cowen, Christopher J.},
abstractNote = {The disclosure provides a creep resistant alloy having an overall composition comprised of iron, chromium, molybdenum, carbon, manganese, silicon, nickel, vanadium, niobium, nitrogen, tungsten, cobalt, tantalum, boron, copper, and potentially additional elements. In an embodiment, the creep resistant alloy has a molybdenum equivalent Mo(eq) from 1.475 to 1.700 wt. % and a quantity (C+N) from 0.145 to 0.205. The overall composition ameliorates sources of microstructural instability such as coarsening of M.sub.23C.sub.6carbides and MX precipitates, and mitigates or eliminates Laves and Z-phase formation. A creep resistant martensitic steel may be fabricated by preparing a melt comprised of the overall composition followed by at least austenizing and tempering. The creep resistant alloy exhibits improved high-temperature creep strength in the temperature environment of around 650.degree. C.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 31 00:00:00 EST 2017},
month = {Tue Jan 31 00:00:00 EST 2017}
}
Works referenced in this record:
Martenstitic stainless steel with improved machinability
patent, June 1995
- Bletton, Olivier; Bayol, Jacques; Terrien, Pascal
- US Patent Document 5,427,635
Rotor for steam turbine and manufacturing method thereof
patent, July 1998
- Ishii, Ryuichi; Tsuda, Yoichi; Yamada, Masayuki
- US Patent Document 5,779,821
Martensitic alloy steels having intermetallic compounds and precipitates as a substitute for cobalt
patent, April 2004
- Bahmiller, Arthur J.
- US Patent Document 6,723,182
Fine-grained martensitic stainless steel and method thereof
patent, May 2005
- Buck, Robert F.
- US Patent Document 6,890,393
Carbo-nitrided case hardened martensitic stainless steels
patent, March 2007
- Chin, Herbert A.; Ogden, William P.; Haluck, David A.
- US Patent Document 7,186,304
Corrosion-resistant, cold-formable, machinable, high strength, martensitic stainless steel
patent, September 2011
- Magee, Jr., John H.
- US Patent Document 8,017,071