Machinable steel

Details Machinable steel Machinable steel

1978-09-12

1979-12-25

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, C21C 702

Patent

active

041803973

ABSTRACT:
Production of resulphurized steel with enhanced machinability having a sulphur content of between 0.05 and 0.20% by weight, in which an alkali earth metal having a high affinity for sulphur (eg. Calcium or Calcium bearing alloys) are added to a steel melt in sufficient quantity to provide in the steel when solidified, isolated globular sulphide inclusions. Calcium additions of between 0.02 and 0.20% by weight are proposed.

REFERENCES:
patent: 3980469 (1976-09-01), Forster
patent: 3992195 (1976-11-01), Klapdar
patent: 3998625 (1976-12-01), Koros
patent: 4004922 (1977-05-01), Thivellier
patent: 4066444 (1978-03-01), Kosmider
patent: 4076522 (1978-02-01), Yoshida
patent: 4083716 (1978-04-01), Yoshida
patent: 4121923 (1978-10-01), Gruner

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