Magnet alloy useful for a magnetic recording and reproducing hea

Details Magnet alloy useful for a magnetic recording and reproducing hea Magnet alloy useful for a magnetic recording and reproducing hea

1981-09-09

1984-04-03

Sheehan, John P.

Alloys or metallic compositions

Nickel base

Iron or manganese containing

420441, 420442, 420457, 420460, 148 3155, 148121, C22C 1903

Patent

active

044407203

ABSTRACT:
A magnet alloy useful for a magnetic recording and reproducing head consist f by weight of 70 to 86% of nickel, more than 1% and less than 14% of niobium, and 0.001 to 3% of beryllium as main ingredients and 0.01 to 10% of total amount of subingredients selected from the group consisting of not more than 8% of molybdenum, not more than 7% of chromium, not more than 10% of tungsten, not more than 7% of titanium, not more than 7% of vanadium, not more than 10% of manganese, not more than 7% of germanium, not more than 5% of zirconium, not more than 2% of rare earth metal, not more than 10% of tantalum, not more than 1% of boron, not more than 5% of aluminum, not more than 5% of silicon, not more than 5% of tin, not more than 5% of antimony, not more than 10% of cobalt and not more than 10% of copper, a small amount of impurities and the remainder iron and having initial permeability of more than 3,000, maximum permeability of more than 5,000, and Vickers hardness of more than 130.

REFERENCES:
patent: 1910309 (1933-05-01), Smith et al.
patent: 2289566 (1942-07-01), Adamoli
patent: 3343949 (1967-09-01), Wikle
patent: 3743550 (1973-07-01), Masumoto et al.
patent: 3807992 (1974-04-01), Komatsu et al.
patent: 3837933 (1974-09-01), Masumoto et al.

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