Ultra-high strength steel having improved resistance to environm

Details Ultra-high strength steel having improved resistance to environm Ultra-high strength steel having improved resistance to environm

1976-05-10

1977-04-26

Schafer, Richard E.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75211, 148126, B22F 316, C22C 105

Patent

active

040199010

ABSTRACT:
An ultra-high strength steel composition of matter having a substantially martensitic matrix with a dispersion therein of a critical amount of metal oxide particles and characterized by increased resistance to environmental stress corrosion cracking. The metal oxide particles are selected from the group consisting of CaO, BaO, MgO, SrO and mixtures thereof, in the range of 0.1 to less than 3 mole percent. A powder metallurgy process to produce articles of manufacture from the composition of matter is disclosed.

REFERENCES:
patent: 3666851 (1972-05-01), Chaklader
patent: 3676079 (1972-07-01), Morgan
patent: 3698891 (1972-10-01), Patil et al.
patent: 3954458 (1976-05-01), Roberts
patent: 3975193 (1976-08-01), Nayar

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