Method for the fabrication of steels with high machinability

Details Method for the fabrication of steels with high machinability Method for the fabrication of steels with high machinability

1983-11-02

1985-07-30

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, C21C 702

Patent

active

045319723

ABSTRACT:
The invention relates to the methods for the preparation of steels with high machinability, comprising globular inclusions which allow for high cutting speeds by means of carbide tools.
The method according to the invention consists of introducing into a liquid steel which has been deoxidized carefully with aluminum, and desulfurized, additions of calcium and sulfur, carried out by a cored wire, the contents obtained being from 20 to 100 ppm calcium and 150 to 500 ppm sulfur.
The steels prepared under this method offer a particular aptitude for high speed machining with the aid of carbide cutting tools.

REFERENCES:
patent: 3467167 (1969-09-01), Mahin
patent: 3575695 (1971-04-01), Miyashita
patent: 3649253 (1971-03-01), Kaess
patent: 4057420 (1977-11-01), Brace
patent: 4094666 (1978-06-01), Ototani
patent: 4286984 (1981-09-01), Luyckx

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