Fracture-tough, high hardness stainless steel and method of making same
A cyrogenically-formed and tempered stainless steel having improved fracture toughness and corrosion resistance at a given hardness level, said steel including at least about 11 weight % Cr for corrosion resistance, at least about 0.28 weight % C for hardness, one or more refractory metal carbide formers in an amount selected to form M2C-type carbides, where M is the refractory metal(s), Cr and/or Fe, Co and Ni in amounts selected to provide an as-quenched austenitic microstructure cryogenically-deformable to a martensitic microstructure including a minor amount of post deformation retained austenite, and the balance essentially Fe, said steel having a cyrogenically-formed martensitic microstructure tempered to include a minor, controlled amount of post-deformation retained austenite and dispersed M[sub 2]C-type carbides.
- Assignee:
- Northwestern Univ., Evanston, IL (United States)
- Patent Number(s):
- US 5221372; A
- Application Number:
- PPN: US 7-835616
- OSTI ID:
- 6404775
- Resource Relation:
- Patent File Date: 13 Feb 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
STAINLESS STEELS
CORROSION RESISTANCE
MECHANICAL PROPERTIES
MICROSTRUCTURE
CARBIDES
CHEMICAL COMPOSITION
FRACTURE PROPERTIES
HARDNESS
TEMPERING
ALLOYS
CARBON COMPOUNDS
CRYSTAL STRUCTURE
HEAT TREATMENTS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
STEELS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies
360105 - Metals & Alloys- Corrosion & Erosion