Apparatus for air quenching railway heads

Details Apparatus for air quenching railway heads Apparatus for air quenching railway heads

1987-03-19

1990-07-03

Sheehan, John P.

Metallurgical apparatus

Means treating solid metal

By contact with gas

266251, 266259, 266249, C21D 904

Patent

active

049384600

ABSTRACT:
Air quenching apparatus develops a pearlite microstructure in the head of a longitudinally travelling railroad 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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