Process for heat-treating the head of railroad rail

Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal

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Details

148146, 148152, 266119, C21D 178

Patent

active

040999963

ABSTRACT:
In the process of heat-treating the head of a railroad rail wherein the rail is stressed so that the head forms a convex arc of predetermined height, the arc height is decreased about 14% after about 10% of the rail head has been heated, and then the original arc height is restored when about 40% of the rail head has been heated and then again decreased when about 60% of the rail head has been heated, and then finally the original arc height is again restored while the last 10% of the rail head length is heat treated.

REFERENCES:
patent: RE27221 (1971-11-01), Dewez, Jr. et al.
patent: 3662995 (1972-05-01), Armstrong

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