Deep cryogenic tempering process based on flashing liquid nitrog

Details Deep cryogenic tempering process based on flashing liquid nitrog Deep cryogenic tempering process based on flashing liquid nitrog

1997-10-30

1999-02-02

Ip, Sikyin

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148578, 148909, 62 64, 62 65, C21D 604

Patent

active

058659137

ABSTRACT:
A method for treating firearm barrels and components to achieve an end result of increased accuracy and extended barrel life. The method involves placing the firearm barrels and components into cryogenic processing and heat treating equipment. The processing temperature is then significantly lowered to about -300 F. and maintained for a predetermined time. The processing temperature is then raised back to ambient temperature. After achieving ambient temperature the processing temperature is then raised to about +300 F. and maintained for a predetermined time. Finally the processing temperature is lowered back to ambient temperature.

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