High speed tool steel having high toughness

Details High speed tool steel having high toughness High speed tool steel having high toughness

1977-03-11

1978-09-26

Steiner, Arthur J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75126D, 75126E, 75126F, 75126H, 75126J, 148 36, C22C 3822, C22C 3824, C22C 3826, C22C 3828

Patent

active

041166841

ABSTRACT:
A high speed tool steel having high toughness as well as excellent wear resistance and heat resistance characteristics, this steel contains, by weight, C 0.7 - 1.4%, Si 0.5% max., Mn 0.5% max., Cr 3 - 6%, W 1 - 3.2%, Mo 5.5 - 7.5%, V 1 - 3.5%, Co 15% max., N 0.02 - 0.1%, one or more of Ti, Nb, and Zr 0.02 - 0.1% in total and the balance being Fe and incidental impurities. The relationship between tungsten and molybdenum contents of the steel is expressed in the formulated range 12% .ltoreq. W + 2Mo .ltoreq. 16%.

REFERENCES:
patent: 2084329 (1937-06-01), Emmons
patent: 2147121 (1939-02-01), Emmons
patent: 2147122 (1939-02-01), Emmons
patent: 2983601 (1961-05-01), Fletcher et al.
patent: 2996376 (1961-08-01), Nehrenberg
patent: 3012879 (1961-12-01), Schempp et al.
patent: 3105723 (1963-10-01), Hamaker, Jr.
patent: 3295966 (1967-01-01), Steven
patent: 3850621 (1974-11-01), Haberling et al.

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