Method for quenching railway rail heads

Details Method for quenching railway rail heads Method for quenching railway rail heads

1991-06-06

1993-02-02

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148581, 266 44, C21D 120, C21D 162

Patent

active

051835193

ABSTRACT:
A method of air quenching a railway rail with an apparatus develops a pearlite microstructure in the head of the longitudinally travelling rail as it travels under the apparatus. A primary air chamber at a controlled pressure provides air to the top and side surfaces of the rail heads. A secondary air chamber at a separately controlled pressure provides air to the shoulders of the rail heads. More than one quench unit may be used in series, in which case the pressures in the primary air chambers may progressively increase to increase the cooling rate.

REFERENCES:
patent: 4611789 (1986-09-01), Ackert et al.

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