Process for welding cast iron

Details Process for welding cast iron Process for welding cast iron

1987-12-28

1988-12-27

Godici, Nicholas P.

Metal fusion bonding

Process

Using dynamic frictional energy

228114, 22826314, B23K 2012

Patent

active

047935421

ABSTRACT:
An improved friction-welding process for effecting a joint between steel and nodular graphite-containing cast iron by using (i) a short friction-generating time so as to minimize diffusion of carbon into steel and (ii) an elevated forging pressure so as to effect a quantitative ejection of carburized melt but avoid formation of a weld laminate, is provided, as well as a nodular graphite-containing cast iron of grade 40.3 S, suitable for use in friction-welding and comprising about 280-320 graphite nodules per mm.sup.2, 280-300 ferrite grains per mm.sup.2 and a spherulite proportion of about at least 95% by weight of the graphite precipitations.

REFERENCES:
DVS (German Welding Engineering Association); Instruction Sheet 2909, Part 1; (Mar. 1980).
Schweissen Und Schneiden (1985), Heft 2; pp. 60-65; Prof. Dr.-Ing. Helmut Richter and Dipl.-Ing. Alfred Palzkill, Wuppertal.
Konstruieren+Giessen 11 (1962) Nr. 2; pp. 33-37; H. Richter and A. Palzkill.

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