Method of making one-piece tubular axle blanks and the produced

Details Method of making one-piece tubular axle blanks and the produced Method of making one-piece tubular axle blanks and the produced

1981-12-21

1983-04-19

Stallard, W.

Metal treatment

Compositions

Heat treating

148 39, C21D 908

Patent

active

043804802

ABSTRACT:
A method for the economical manufacture of one-piece tubular axle blanks of the type having a center portion with journals at both ends. The method involves quenching a length of a preheated steel tube followed by tempering and then swaging at both ends by forging or hammering. The areas of transition between the center portion and the respective journals are thickened by upsetting, and the ends of the axle blank are subsequently locally heat treated by annealing.

REFERENCES:
patent: 1967317 (1934-07-01), Mogford et al.
patent: 2632235 (1953-03-01), Doyle et al.
patent: 3492116 (1970-01-01), Kenneford et al.
patent: 3535910 (1970-10-01), Connolly
patent: 3966507 (1976-06-01), Herbert
patent: 4204892 (1980-05-01), Economopoulos

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