Case hardenable corrosion resistant steel alloy and article made

Details Case hardenable corrosion resistant steel alloy and article made Case hardenable corrosion resistant steel alloy and article made

1989-08-04

1991-03-26

Yee, Deborah

Alloys or metallic compositions

Ferrous

Nine percent or more chromium containing

148319, 148325, 148326, C22C 3852

Patent

active

050027298

ABSTRACT:
This invention provides a case hardening steel alloy and articles made therefrom which, when case hardened and heat treated, have high case hardness, corrosion resistance, high temperature capability and metal-to-metal wear resistance and high core ductility, impact toughness and fracture toughness. The alloy contains about 0.05-0.1 w/o C, 0.04 w/o max. N, 1.5 w/o max. Mn, 1 w/o max. Si, 11-15 w/o Cr, 1-3 w/o Mo, 1.5-3.5 w/o Ni, 3-8 w/o Co, 0.1-1 w/o V, and the balance Fe. In a preferred embodiment, the alloy is balanced according to Equation 1 (Eq.1) so that:

REFERENCES:
patent: 964003 (1977-11-01), Rehrer
patent: 2590835 (1952-04-01), Kirkby et al.
patent: 3154412 (1964-10-01), Kasak et al.
patent: 3316085 (1967-04-01), Grundman et al.
patent: 3663208 (1972-05-01), Kirby et al.

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