Carburization treatment method

Details Carburization treatment method Carburization treatment method

2002-03-28

2009-08-18

Ip, Sikyin (Department: 1793)

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

C148S235000

Reexamination Certificate

active

07575643

ABSTRACT:
The invention provides a carburization treatment method in which the carburization treatment is conducted under a condition where an atmosphere within the furnace is maintained at a high carbon potential which is slightly blow a carbon solid solubility. Preferably, the internal pressure within the furnace is kept at 0.1 to 101 kPa, the hydrocarbon gas is one, two or more than two kinds of gases selected from the group consisting of C3H8, C3H6, C4H10, C2H2, C2H4, C2H6and CH4, while the oxidative gas is an air, an O2gas, or CO2gas.

REFERENCES:
patent: 4386973 (1983-06-01), Kawka et al.
patent: 5827375 (1998-10-01), Barbour
“Heat treating in vacuum furnaces and auxiliary equipment”, ASM Handbook, Heat Treating, vol. 4, 1991, sections “Introduction” and “Comparison of vacuum and atmosphere furnace processing.”

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