Amorphous iron based alloy and method of manufacture

Details Amorphous iron based alloy and method of manufacture Amorphous iron based alloy and method of manufacture

1995-04-24

1996-06-04

Sheehan, John

Metal treatment

Stock

Magnetic

148307, 420117, 420121, H01F 1153

Patent

active

055229476

ABSTRACT:
Disclosed are an amorphous iron based alloy having excellent magnetic characteristics as well as bendability and a method of manufacturing the amorphous iron based alloy.
The amorphous iron based alloy has a mean centerline Ra surface roughness of about 0.8 .mu.m or less and the formula Fe.sub.X B.sub.Y Si.sub.Z Mn.sub.a in approximate proportions wherein:
75<X<82 at %
7<Y<15 at %,
7<Z<17 at %, and
0.2<a<0.5 at %.
The method of manufacturing the amorphous iron based alloy comprises quenching and solidifying a molten alloy having the formula Fe.sub.X B.sub.Y Si.sub.Z Mn.sub.a in approximate proportions wherein:
75<X<82 at %
7<Y<15 at %,
7<Z<17 at %, and
0.2<a<0.5 at %, and
effecting the quenching and solidifying steps in a Co.sub.2. atmosphere containing H.sub.2 in an amount of about 1-4% by volume.

REFERENCES:
patent: 4587507 (1986-06-01), Takayama et al.
patent: 4637843 (1987-01-01), Takayama et al.

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