Free cutting steel

Details Free cutting steel Free cutting steel

1985-06-17

1989-02-21

Yee, Deborah

Alloys or metallic compositions

Ferrous

Lead, bismuth, selenium, tellurium or calcium containing

420 86, 420 87, 420 88, 164459, 164473, C22C 3860

Patent

active

048063045

ABSTRACT:
Sulfur-containing free-cutting steel may have an improved machinability and fewer defects by adding certain amounts of Te, Pb and Bi to prevent elongation of sulfide inclusion particles, and by lowering Al-content to decrease Al.sub.2 O.sub.3 of oxide inclusions or by lowering O-content to decrease large Al.sub.2 O.sub.3 inclusion particles. The free-cutting steel may be produced by continuous casting.

REFERENCES:
patent: 3973950 (1976-08-01), Itoh et al.
patent: 4236939 (1980-12-01), Bhattacharya et al.
patent: 4255188 (1981-03-01), Riekels
patent: 4279646 (1981-07-01), Kato et al.
patent: 4326886 (1982-04-01), Abeyama et al.
patent: 4524819 (1985-06-01), Yoshimura
patent: 4719079 (1988-01-01), Katayama et al.

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