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

Patent · 01 January 1994

OSTI ID:869287

Buck, Robert F ^[1]

---

1. N. Huntingdon, PA

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.

• Research Organization: Carnegie-Mellon University
• Sponsoring Organization: USDOE
• DOE Contract Number: FG07-89ER12892
• Assignee: Buck, Robert F. (North Huntingdon, PA)
• Patent Number(s): US 5310431
• OSTI ID: 869287
• Country of Publication: United States
• Language: English

Related Subjects

/148/
05-0
1-0
1-5
41-1
5-2
8-12
afforded
balance
balance iron
closely
closely spaced
coarsen
combines
composition
consists
corrosion-resistant
creep
creep resistant
delta
delta ferrite
dispersion
dispersion-strengthened
ease
essentially
essentially free
excellent
fabricability
ferrite
fine
fine particle
fine particles
free
hardenable
iron
iron-based
martensitic
martensitic stainless
martensitic steel
method
microstructure
nominal
nominal composition
particles
precipitation
precipitation hardenable
precipitation strengthened
precipitation-dispersion-strengthened
resistant
spaced
stainless
stainless steel
steel
steels
strength
strengthened
structure consist
temperatures
uniform
uniform dispersion