Amorphous iron based alloy and method of manufacture

摘要

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 FeXBYSiZMna 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 FeXBYSiZMna 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 Co2. atmosphere containing H2 in an amount of about 1-4% by volume.