Metal treatment – Process of modifying or maintaining internal physical... – Carburizing or nitriding using externally supplied carbon or...
Patent
1991-01-22
1992-08-25
Dean, R.
Metal treatment
Process of modifying or maintaining internal physical...
Carburizing or nitriding using externally supplied carbon or...
148230, C21D 106
Patent
active
051415674
ABSTRACT:
Steel is nitrided first by treating the steel to be nitrided with NF.sub.3 at elevated temperatures to form a fluorinated layer on the steel, and then the steel is nitrided by heating in a nitriding atmosphere.
REFERENCES:
patent: 5013371 (1991-05-01), Tahara et al.
Kitano Kenzo
Minato Teruo
Tahara Masaaki
Tomoda Takakazu
Daidousanso Co., Ltd
Dean R.
Koehler Robert R.
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