Metal treatment – Process of modifying or maintaining internal physical... – Carburizing or nitriding using externally supplied carbon or...
Reexamination Certificate
2005-01-25
2005-01-25
Kastler, Scott (Department: 1742)
Metal treatment
Process of modifying or maintaining internal physical...
Carburizing or nitriding using externally supplied carbon or...
C266S080000, C266S252000
Reexamination Certificate
active
06846366
ABSTRACT:
There is provided an economical carburizing method and carburization apparatus capable of carrying out carburizing treatment with a quality as high as that in a normal case and a high reproducibility even if carburizing conditions differ from those in a normal case. A carburization apparatus for carrying out carburization in an atmosphere gas containing not more than 30% by volume of carbon monoxide under a pressure of 13 to 4,000 Pa has a carburizing chamber3for housing an object4to be treated; an oxygen sensor20for measuring an oxygen concentration in the atmosphere gas in the carburizing chamber3during carburization; and a mass flow controller5for adjusting a composition of the atmosphere gas in the carburizing chamber3according to a measurement result by the oxygen sensor20.
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Asai Shigeta
Kawata Kazuki
Sato Hatsuo
Sekiya Yoshiyuki
Kastler Scott
Oriental Engineering Co., Ltd.
Young & Basile P.C.
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