Technique for adding lead to steel

Details Technique for adding lead to steel Technique for adding lead to steel

1981-07-06

1983-02-01

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 53, 75 58, C21B 702

Patent

active

043713955

ABSTRACT:
A resulfurized ferrous alloy including lead characterized in that the lead is well dispersed in the steel matrix and the free lead globules are controlled as to size, is produced by introducing the lead into a steel melt in the form of a fine lead sulfide (PbS), or galena powder. The alloy produced exhibits improved machinability, which characteristic is further enhanced by the formation of manganese sulfide particles which are well distributed and have minimum aspect ratio (i.e., are round) when the melt has been deoxidized with manganese.

REFERENCES:
patent: 2781258 (1957-02-01), Niedzwiedzki
patent: 3671224 (1972-06-01), North
patent: 3726669 (1973-04-01), Breyer
patent: 3756805 (1973-09-01), Ormaechea
patent: 3820982 (1974-06-01), Thomas
patent: 3836359 (1974-09-01), Thomas
patent: 3876422 (1975-04-01), Cantera
patent: 4056387 (1977-11-01), Cantera
patent: 4203763 (1980-05-01), Johnsson

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