System for cooling shape-rolled rails

Details System for cooling shape-rolled rails System for cooling shape-rolled rails

2007-07-23

2010-12-21

Kastler, Scott (Department: 1733)

Metallurgical apparatus

With control means responsive to sensed condition

With means supplying a treating agent

C266S114000

Reexamination Certificate

active

07854883

ABSTRACT:
A system for cooling a hot rail of rail steel to a fine perlitic or ferritic or perlitic/ferritic structure has a plurality of separate cooling modules with independently adjustable cooling parameters. The rail is guided downstream through the modules of the cooling stretch and through intermediate zones between the modules so as to cool the surface of the rail in each of the modules and to subject the rail to destressing or stress relief between the modules. Sensors in each of the intermediate zones detect the actual surface temperature of the rail in the respective zones, and a controller connected to the modules and to the sensors varies the cooling parameters of the cooling modules in dependence on the detected temperatures in the respective upstream zones to ensure a defined temperature in the rail that lies above a critical temperature at which bainitic structure components are formed.

REFERENCES:
patent: 4243441 (1981-01-01), Wilson
patent: 6689230 (2004-02-01), Meyer et al.
patent: 2004/0187974 (2004-09-01), Kuppers et al.
patent: 1013759 (2003-02-01), None
patent: WO-03/012151 (2003-02-01), None

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