Method for obtaining iron-based alloys allowing in particular th

Details Method for obtaining iron-based alloys allowing in particular th Method for obtaining iron-based alloys allowing in particular th

1979-04-03

1981-09-22

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 53, 75 58, 75123L, 75134S, C22C 3308

Patent

active

042908051

ABSTRACT:
This invention relates to the use of lanthanum in the production of iron-based alloys. Accordingly, is provided a method comprising adding at least 0.0001 to about 0.5 to 2 weight percent of lanthanum to said iron-based alloy during its production. Thus the solidification curve is modified, as shown in FIG. 2, thereby reducing or preventing certain defects of said alloys, such as pinholes and cavities in spheroidal graphite cast-irons, carbides in flaky graphite grey-iron; the castability, rollability and anisotropy of steels are improved.

REFERENCES:
patent: 3065070 (1962-11-01), Otani
patent: 3492118 (1970-01-01), Mickelson
patent: 3666570 (1972-05-01), Korchynsky
patent: 3729309 (1973-04-01), Kawawa
patent: 3765875 (1973-10-01), Septier
patent: 3816103 (1974-06-01), Link
patent: 3871870 (1975-03-01), Nemoto
patent: 3928083 (1975-12-01), Gondo
patent: 3997338 (1976-12-01), Eeghem
patent: 4042381 (1977-08-01), Thomas
patent: 4086086 (1978-04-01), Dawson

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