Metal treatment – Process of modifying or maintaining internal physical... – Carburizing or nitriding using externally supplied carbon or...
Patent
1992-01-17
1993-03-16
Yee, Deborah
Metal treatment
Process of modifying or maintaining internal physical...
Carburizing or nitriding using externally supplied carbon or...
C21D 106
Patent
active
051940973
ABSTRACT:
This invention relates to a method of nitriding steel material in a second heat treatment furnace after fluorinating the steel material in a first heat treat furnaceto form a deep and uniform nitrided layer. Then, steel material is treated smoothly by defining the ratio of establishing said both furnaces for fluorinating and niriding on the basis of treating time required for said both treatments since time required for each treatment is different.
REFERENCES:
patent: 5013371 (1991-05-01), Tahara et al.
Kitano Kenzo
Minato Teruo
Senbokuya Haruo
Tahara Masaaki
Daidousanso Co. Ltd.
Maizura Kogyo Co., Ltd.
Yee Deborah
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