Rail hardening machine and method

Details Rail hardening machine and method Rail hardening machine and method

1978-06-21

1980-05-06

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148130, 148152, 266115, 266127, C21D 178

Patent

active

042016029

ABSTRACT:
A technique for heat treating the upper surface of the head of an in situ rail is disclosed. A car carrying an induction heater followed by an air quencher and then an air and water quencher is passed along the track. In this way the upper surface of the rail head passes through successive stages of heating from ambient temperature, austenization, hardening, tempering and cooling to ambient temperature thus bringing about desired hardening of the rail head. The tendency of the rail to bend concave upwardly due to this heat treatment is counteracted by applying an upward mechanical force to the rail to tend to bend the rail in the opposite direction i.e. concave downwardly. The mechanical force is applied by a lifting mechanism carried on the rail car, the lifting mechanism progressively bending the rail simultaneously with the heat treatment.

REFERENCES:
patent: 3193270 (1965-07-01), Dewez, Jr. et al.
patent: 3266956 (1966-08-01), Bennewitz et al.
patent: 3275481 (1966-09-01), Adams, Jr.
patent: 4099996 (1978-07-01), Toleikis, Jr.

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