High strength, tough alloy steel
Abstract
A high strength, tough alloy steel is formed by heating the steel to a temperature in the austenite range (1000.degree.-1100.degree. C.) to form a homogeneous austenite phase and then cooling the steel to form a microstructure of uniformly dispersed dislocated martensite separated by continuous thin boundary films of stabilized retained austenite. The steel includes 0.2-0.35 weight % carbon, at least 1% and preferably 3-4.5% chromium, and at least one other substitutional alloying element, preferably manganese or nickel. The austenite film is stable to subsequent heat treatment as by tempering (below 300.degree. C.) and reforms to a stable film after austenite grain refinement.
- Inventors:
-
- Berkeley, CA
- Albany, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 863434
- Patent Number(s):
- 4170497
- Assignee:
- Regents of University of California (Berkeley, CA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
C - CHEMISTRY C22 - METALLURGY C22C - ALLOYS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- strength; tough; alloy; steel; formed; heating; temperature; austenite; range; 1000; degree; -1100; form; homogeneous; phase; cooling; microstructure; uniformly; dispersed; dislocated; martensite; separated; continuous; boundary; films; stabilized; retained; 2-0; 35; weight; carbon; preferably; 3-4; chromium; substitutional; alloying; element; manganese; nickel; film; stable; subsequent; heat; treatment; tempering; below; 300; reforms; grain; refinement; subsequent heat; heat treatment; alloy steel; uniformly dispersed; stable film; austenite phase; alloying element; tough alloy; uniformly disperse; homogeneous austenite; austenite range; /148/
Citation Formats
Thomas, Gareth, and Rao, Bangaru V. N. High strength, tough alloy steel. United States: N. p., 1979.
Web.
Thomas, Gareth, & Rao, Bangaru V. N. High strength, tough alloy steel. United States.
Thomas, Gareth, and Rao, Bangaru V. N. Mon .
"High strength, tough alloy steel". United States. https://www.osti.gov/servlets/purl/863434.
@article{osti_863434,
title = {High strength, tough alloy steel},
author = {Thomas, Gareth and Rao, Bangaru V. N.},
abstractNote = {A high strength, tough alloy steel is formed by heating the steel to a temperature in the austenite range (1000.degree.-1100.degree. C.) to form a homogeneous austenite phase and then cooling the steel to form a microstructure of uniformly dispersed dislocated martensite separated by continuous thin boundary films of stabilized retained austenite. The steel includes 0.2-0.35 weight % carbon, at least 1% and preferably 3-4.5% chromium, and at least one other substitutional alloying element, preferably manganese or nickel. The austenite film is stable to subsequent heat treatment as by tempering (below 300.degree. C.) and reforms to a stable film after austenite grain refinement.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}
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