Process for making a martensitic steel alloy fuel cladding product
Patent
·
OSTI ID:867390
- Kennewick, WA
- Richland, WA
- West Richland, WA
This is a very narrowly defined martensitic steel alloy fuel cladding material for liquid metal cooled reactors, and a process for making such a martensitic steel alloy material. The alloy contains about 10.6 wt. % chromium, about 1.5 wt. % molybdenum, about 0.85 wt. % manganese, about 0.2 wt. % niobium, about 0.37 wt. % silicon, about 0.2 wt. % carbon, about 0.2 wt. % vanadium, 0.05 maximum wt. % nickel, about 0.015 wt. % nitrogen, about 0.015 wt. % sulfur, about 0.05 wt. % copper, about 0.007 wt. % boron, about 0.007 wt. % phosphorous, and with the remainder being essentially iron. The process utilizes preparing such an alloy and homogenizing said alloy at about 1000.degree. C. for 16 hours; annealing said homogenized alloy at 1150.degree. C. for 15 minutes; and tempering said annealed alloy at 700.degree. C. for 2 hours. The material exhibits good high temperature strength (especially long stress rupture life) at elevated temperature (500.degree.-760.degree. C.).
- Research Organization:
- WESTINGHOUSE HANFORD CO
- DOE Contract Number:
- AC06-76FF02170
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4927468
- OSTI ID:
- 867390
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
-760
/148/976/
007
015
05
10
1000
1150
15
16
37
500
700
85
alloy
alloy contains
alloy fuel
alloy material
annealed
annealing
boron
carbon
chromium
cladding
cladding material
contains
cooled
cooled reactor
cooled reactors
copper
defined
degree
elevated
elevated temperature
especially
essentially
essentially iron
exhibits
fuel
fuel cladding
homogenized
homogenizing
hours
iron
life
liquid
liquid metal
manganese
martensitic
martensitic steel
material
material exhibits
maximum
metal
metal cooled
minutes
molybdenum
narrowly
narrowly defined
nickel
niobium
nitrogen
phosphorous
preparing
process
process utilizes
product
reactors
remainder
rupture
silicon
steel
steel alloy
strength
stress
stress rupture
sulfur
temperature
temperature strength
tempering
utilizes
vanadium
wt
/148/976/
007
015
05
10
1000
1150
15
16
37
500
700
85
alloy
alloy contains
alloy fuel
alloy material
annealed
annealing
boron
carbon
chromium
cladding
cladding material
contains
cooled
cooled reactor
cooled reactors
copper
defined
degree
elevated
elevated temperature
especially
essentially
essentially iron
exhibits
fuel
fuel cladding
homogenized
homogenizing
hours
iron
life
liquid
liquid metal
manganese
martensitic
martensitic steel
material
material exhibits
maximum
metal
metal cooled
minutes
molybdenum
narrowly
narrowly defined
nickel
niobium
nitrogen
phosphorous
preparing
process
process utilizes
product
reactors
remainder
rupture
silicon
steel
steel alloy
strength
stress
stress rupture
sulfur
temperature
temperature strength
tempering
utilizes
vanadium
wt