Boron containing, iron-manganese-zirconium master-alloy

Details Boron containing, iron-manganese-zirconium master-alloy Boron containing, iron-manganese-zirconium master-alloy

1981-04-24

1982-10-12

Rutledge, L. Dewayne

Alloys or metallic compositions

Zirconium or hafnium base

420434, 420581, C22C 1600, C22C 2200, C22C 3000

Patent

active

043538657

ABSTRACT:
This invention relates to special ferromanganese type master-alloys, such as normally are added to steels during the process of melting and/or deoxidation, except that in the new master-alloy substantial amounts of zirconium and boron are added to make the new material especially suitable as an addition for boron in various boron-containing steels.
A typical aim composition for the new Fe-Mn-Zr-B master-alloy would be about 20% Fe, about 40% Mn, about 35% Zr, about 2.5% B, about 2.0% C, and the balance residual elements with preferably not more than about 0.5% Al. It can be noted that the ratio of the Zr to the B contents is about 14:1. This means that for a steel addition of 0.0025% B, an amount of 0.035% Zr would be available in the steel to enhance the hardenability contribution of the B to the steel and to prevent "fading" of the boron during the heating operations.

REFERENCES:
patent: 4116682 (1978-09-01), Polk et al.
patent: 4311523 (1982-01-01), Luycky

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