Metal treatment – Compositions – Heat treating
Patent
1978-03-01
1986-05-27
Andrews, Melvyn J.
Metal treatment
Compositions
Heat treating
148425, 148427, 148442, C21D 914
Patent
active
045913935
ABSTRACT:
Certain high strength alloys lacking resistance to hydrogen embrittlement are cold worked and heat treated utilizing critical preselected conditions to result in a unique alloy having increased resistance to hydrogen embrittlement without unacceptable loss of strength. It is theorized that this unexpected improved resistance correlates with the concentration of certain elements, such as phosphorus and sulfur as impurities on the crystallographic boundary surfaces of the alloy.
REFERENCES:
patent: 3645726 (1972-02-01), Copson et al.
patent: 3767385 (1973-10-01), Slaney
patent: 4026583 (1977-05-01), Gottlieb
Berkowitz Barry J.
Greer James B.
Jacobs Dawn F.
Kane Russell D.
Andrews Melvyn J.
Exxon Production Research Co.
Exxon Research & Engineering Co.
Nametz Michael A.
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