Creep resistant, precipitation-dispersion-strengthened, martensitic stainless steel and method thereof

Patent · Tue May 10 00:00:00 EDT 1994

OSTI ID:7109058

Buck, R F

An iron-based, corrosion-resistant, precipitation strengthened, martensitic steel essentially free of delta ferrite for use at high temperatures has a nominal composition of 0.05--0.1 C, 8--12 Cr, 1--5 Co, 0.5--2.0 Ni, 0.41--1.0 Mo, 0.1--0.5 Ti, and the balance iron. This steel is different from other corrosion-resistant martensitic steels because its microstructure consists of a uniform dispersion of fine particles, which are very closely spaced, and which do not coarsen at high temperatures. Thus at high temperatures this steel combines the excellent creep strength of dispersion-strengthened steels, with the ease of fabricability afforded by precipitation hardenable steels. 2 figures.

• Research Organization: Carnegie-Mellon University
• DOE Contract Number: FG07-89ER12892
• Assignee: Robert F. Buck, North Huntingdon, PA (United States)
• Patent Number(s): US 5310431; A
• Application Number: PPN: US 7-957724
• OSTI ID: 7109058
• Resource Relation: Patent File Date: 7 Oct 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MARTENSITIC STEELS
CORROSION RESISTANCE
CREEP
MICROSTRUCTURE
CARBON ADDITIONS
CHEMICAL COMPOSITION
CHROMIUM ALLOYS
COBALT ALLOYS
MOLYBDENUM ADDITIONS
NICKEL ADDITIONS
NICKEL ALLOYS
TITANIUM ADDITIONS
ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
STEELS
TITANIUM ALLOYS
360100* - Metals & Alloys