Mitsui Engineering and Shipbuilding Company Limited

Metal Research Corporation

Toru Degawa

Tohei Ototani

Makoto Ebata

Kenichi Kusumoto

Gen Okuyama

Seiju Uchida

Akio Hashimoto

Kouzou Fujiwara

Takashi Satou

Kozo Fujiwara

Susumu Matsui

Kanicki Kusumoto

An iron base alloy is disclosed which consists essentially of 0.005%-7.0% of aluminum, 0.005-7.0% of silicon, 0.0001%-0.005% of magnesium, 0.0001-0.005% of calcium, 0.001%-0.002% of oxygen, 0.0001-0.002% of sulphur, and 0.0005%-0.003% of nitrogen, less than 2% of carbon, minor amounts of phosphorous and manganese and the remainder iron.

Iron based alloy having low contents of aluminum silicon, magnesium,

A method of producing an alloy containing at least one major ingredient selected from the group consisting of iron (Fe), cobalt (Co), and Nickel (Ni) and having low contents of sulphur, oxygen, and nitrogen, comprises steps of:

Method of producing an iron-, cobalt- and nickel-base alloy having low

Method of producing an iron; cobalt and nickel base alloy having low

Ti or a high-Ti alloy is melted in a container composed of high-purity CaO materials on its inner sides. The materials are composed of not less than 99% by weight of CaO, not more than 0.1% by weight of SiO.sub.2, not more than 0.02% by weight of Fe.sub.2 O.sub.3, and not more than 0.5% by weight in total of other metal oxides under a non-oxidizing atmosphere. CaO refractories for use in the melting of Ti or a high-Ti alloy contains not less than 99% by weight of CaO, not more than 0.1% by weight of SiO.sub.2, 0.02% by weight of Fe.sub.2 O.sub.3, and not more than 0.5% by weight of other metal oxides.

Method for melting Ti or a high-Ti alloy in CaO refractories

A lanthanide-containing alloy is produced by retaining the melt of this alloy by the use of a container having the inner surface formed of a calcia-based refractory possessing a CaO content of not less than 90% by weight in a non-oxidizing atmosphere.

Method for production of lanthanide-containing alloy

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Toru Degawa