Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1978-05-15
1979-07-24
Steiner, Arthur J.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75123K, 75123L, 75123J, 75128C, 75128W, 148 36, C22C 3802, C22C 3806
Patent
active
041621573
ABSTRACT:
A secondary hardening alloy steel composition consisting essentially of about 0.25-0.5% carbon, about 0.5-1.0% manganese, about 1.5-3.0% nickel, about 0-1.0% chromium, about 1.75-2.5% molybdenum, about 0-0.4% vanadium, and an additive selected from about 1-3% aluminum and a combination of at least about 1% aluminum and at least about 1% silicon for a combined Al+Si content of about 2-4%, the balance being iron and impurity elements. The present steel composition has the following characteristics: it exhibits a flat tempering response, it is hardenable upon tempering to a Rockwell C hardness of at least 50, and it has an improved combination of hardness vs. toughness properties after tempering in the secondary hardening range. A method of preparation is also described.
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Bhat Manjeshwar S.
Garrison, Jr. Warren M.
Parker Earl R.
Zackay Victor F.
Bernheim William S.
Croft Irene S.
Gaither R. S.
Steiner Arthur J.
The United States of America as represented by the United States
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