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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 Lab. (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.. Mon . "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 = {1979},
month = {1}
}

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