Free-cutting structural steel for machines

Details Free-cutting structural steel for machines Free-cutting structural steel for machines

1977-01-24

1978-09-19

Steiner, Arthur J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75123F, 75123G, 75123R, 75126G, 75126L, 75126R, 75128E, 75128R, 148 36, C22C 3860

Patent

active

041151119

ABSTRACT:
The present invention relates to a free-cutting structural steel for machines characterized by containing a range of 30-100 g/steel ton of oxide inclusions mainly composed of SiO.sub.2 40-60%, CaO 13-30% and Al.sub.2 O.sub.3 25-40%, the balance being less than 20% of other oxides and calcium 0.0002-0.0010%, and at least one of the following elements; lead 0.03-0.30% and sulfur 0.035-0.10%.

REFERENCES:
patent: 3630723 (1971-12-01), Asuda
patent: 3634074 (1972-01-01), Ito et al.
patent: 3652267 (1972-03-01), Ito et al.
patent: 3844773 (1974-10-01), Yamakoshi et al.
patent: 3948649 (1976-04-01), Takahashi et al.
Archiv fur das Eisenhuttenwesen, 33 Jahrgang Heft 12, Dec. 1962, pp. 841-851.
Journal of the Iron and Steel Institute, Oct. 1965, pp. 995-997.

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