Transformation process for production of ultrahigh carbon steels and new alloys

Strum, Michael J; Goldberg, Alfred; Sherby, Oleg D; Landingham, Richard L

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Title: Transformation process for production of ultrahigh carbon steels and new alloys

Abstract

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.

Inventors:

Strum, Michael J ^[1]; Goldberg, Alfred ^[2]; Sherby, Oleg D ^[3]; Landingham, Richard L ^[2]

Pleasanton, CA
Livermore, CA
Palo Alto, CA

Issue Date:: 1995-01-01

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

OSTI Identifier:: 870047

Patent Number(s):: 5445685

Assignee:: Regents of University of California (Oakland, CA)

Patent Classifications (CPCs):: C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

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C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
C21D1/32 - Soft annealing, e.g. spheroidising
C21D6/00 - Heat treatment of ferrous alloys
C21D6/002 - {containing Cr

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DOE Contract Number:: W-7405-ENG-48

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: transformation; process; production; ultrahigh; carbon; steels; alloys; superplastic; properties; produced; heating; steel; containing; ferrite; carbide; phases; soaking; temperature; approximately; 50; degree; sufficient; time; major; portion; carbides; dissolve; austenite; matrix; cooling; controlled; manner; predetermined; limits; rate; obtain; substantially; spheroidal; alloy; compositions; contain; aluminum; solute; additions; promote; formation; fine; grain; size; improve; resistance; coarsening; forming; cooling rate; alloy composition; grain size; major portion; sufficient time; carbon steel; controlled manner; carbon steels; predetermined limits; fine grain; alloy compositions; compositions contain; ultrahigh carbon; formation process; carbide phases; /148/

Citation Formats


                    Strum, Michael J, Goldberg, Alfred, Sherby, Oleg D, and Landingham, Richard L. Transformation process for production of ultrahigh carbon steels and new alloys.  United States: N. p., 1995. 
        Web.

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                    Strum, Michael J, Goldberg, Alfred, Sherby, Oleg D, & Landingham, Richard L. Transformation process for production of ultrahigh carbon steels and new alloys.  United States.

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                    Strum, Michael J, Goldberg, Alfred, Sherby, Oleg D, and Landingham, Richard L. Sun .  
        "Transformation process for production of ultrahigh carbon steels and new alloys".  United States.  https://www.osti.gov/servlets/purl/870047.

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@article{osti_870047,

  title        = {Transformation process for production of ultrahigh carbon steels and new alloys},

  author       = {Strum, Michael J and Goldberg, Alfred and Sherby, Oleg D and Landingham, Richard L},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1995},

  month        = {1}

}

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Works referenced in this record:

Ultrahigh Carbon Steels
journal, June 1985

Sherby, O. D.; Oyama, T.; Kum, D. W.
JOM, Vol. 37, Issue 6
https://doi.org/10.1007/BF03257713

Structural superplasticity of a fine-grained and rapidly solidified ultra-high carbon-alloy tool steel X 245 VCr 10 5
journal, June 1991

Frommeyer, Georg; Speis, Hans-Josef
Steel Research, Vol. 62, Issue 6
https://doi.org/10.1002/srin.199101288

Effects of Chromium, Molybdenum and Vanadium on Spheroidization of Carbides in 0.8% Carbon Steel
journal, January 1977

Nakano, Taira; Kawatani, Hiroshi; Kinoshita, Shushi
Transactions of the Iron and Steel Institute of Japan, Vol. 17, Issue 2
https://doi.org/10.2355/isijinternational1966.17.110

Influence of nickel and vanadium on superplasticity in ultrahigh-carbon steels
journal, August 1978

Wadsworth, J.; Sherby, O. D.
Journal of Mechanical Working Technology, Vol. 2, Issue 1
https://doi.org/10.1016/0378-3804(78)90014-1

Damascus Steel Rediscovered?
journal, January 1979

Sherby, Oleg D.
Transactions of the Iron and Steel Institute of Japan, Vol. 19, Issue 7
https://doi.org/10.2355/isijinternational1966.19.381

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Similar Records

Title: Transformation process for production of ultrahigh carbon steels and new alloys

Abstract

Citation Formats

Ultrahigh Carbon Steels journal, June 1985

Structural superplasticity of a fine-grained and rapidly solidified ultra-high carbon-alloy tool steel X 245 VCr 10 5 journal, June 1991

Effects of Chromium, Molybdenum and Vanadium on Spheroidization of Carbides in 0.8% Carbon Steel journal, January 1977

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Structural superplasticity of a fine-grained and rapidly solidified ultra-high carbon-alloy tool steel X 245 VCr 10 5
journal, June 1991

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journal, January 1977

Influence of nickel and vanadium on superplasticity in ultrahigh-carbon steels
journal, August 1978

Damascus Steel Rediscovered?
journal, January 1979