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Title: Method of making high strength, tough alloy steel

Abstract

A high strength, tough alloy steel, particularly suitable for the mining industry, 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 subsitutional 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:
 [1];  [2]
  1. Berkeley, CA
  2. Albany, CA
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
OSTI Identifier:
863435
Patent Number(s):
US 4170499
Assignee:
Regents of University of California (Berkeley, CA)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; strength; tough; alloy; steel; particularly; suitable; mining; industry; 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; subsitutional; alloying; element; manganese; nickel; film; stable; subsequent; heat; treatment; tempering; below; 300; reforms; grain; refinement; subsequent heat; particularly suitable; 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. Method of making high strength, tough alloy steel. United States: N. p., 1979. Web.
Thomas, Gareth, & Rao, Bangaru V. N. Method of making high strength, tough alloy steel. United States.
Thomas, Gareth, and Rao, Bangaru V. N. 1979. "Method of making high strength, tough alloy steel". United States. https://www.osti.gov/servlets/purl/863435.
@article{osti_863435,
title = {Method of making high strength, tough alloy steel},
author = {Thomas, Gareth and Rao, Bangaru V. N.},
abstractNote = {A high strength, tough alloy steel, particularly suitable for the mining industry, 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 subsitutional 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 = {},
url = {https://www.osti.gov/biblio/863435}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1979},
month = {Mon Jan 01 00:00:00 EST 1979}
}