Transformation process for production of ultrahigh carbon steels and new alloys
- Pleasanton, CA
- Livermore, CA
- Palo Alto, CA
Ultrahigh carbon steels with superplastic properties are produced by heating a steel containing ferrite and carbide phases to a soaking temperature approximately 50.degree. C. above the A.sub.1 transformation temperature, soaking the steel above the A.sub.1 temperature for a sufficient time that the major portion of the carbides dissolve into the austenite matrix, and then cooling the steel in a controlled manner within predetermined limits of cooling rate or transformation temperature, to obtain a steel having substantially spheroidal carbides. New alloy compositions contain aluminum and solute additions which promote the formation of a fine grain size and improve the resistance of the carbides to coarsening at the forming temperature.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Number(s):
- US 5445685
- OSTI ID:
- 870047
- Country of Publication:
- United States
- Language:
- English
Influence of nickel and vanadium on superplasticity in ultrahigh-carbon steels
|
journal | August 1978 |
Structural superplasticity of a fine-grained and rapidly solidified ultra-high carbon-alloy tool steel X 245 VCr 10 5
|
journal | June 1991 |
Damascus Steel Rediscovered?
|
journal | January 1979 |
Ultrahigh Carbon Steels
|
journal | June 1985 |
Effects of Chromium, Molybdenum and Vanadium on Spheroidization of Carbides in 0.8% Carbon Steel
|
journal | January 1977 |
Similar Records
First semi-annual progress report on development of superplastic steel processing: A joint R and D effort between industry and a national laboratory: Caterpillar Inc. , Peoria, IL; Ladish Co. , Inc. , Cudahy, WI; North Star Steel Company, Monroe, MI; Lawrence Livermore National Laboratory, Livermore, CA
Ultrahigh carbon steel for automotive applications
Related Subjects
50
additions
alloy
alloy composition
alloy compositions
alloys
aluminum
approximately
austenite
carbide
carbide phases
carbides
carbon
carbon steel
carbon steels
coarsening
compositions
compositions contain
contain
containing
controlled
controlled manner
cooling
cooling rate
degree
dissolve
ferrite
fine
fine grain
formation
formation process
forming
grain
grain size
heating
improve
limits
major
major portion
manner
matrix
obtain
phases
portion
predetermined
predetermined limits
process
produced
production
promote
properties
rate
resistance
size
soaking
solute
spheroidal
steel
steels
substantially
sufficient
sufficient time
superplastic
temperature
time
transformation
ultrahigh
ultrahigh carbon