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Title:
METHOD FOR USING HEAT TREATMENT FURNACE, METHOD OF HEAT TREATMENT, AND HEAT TREATMENT FURNACE
Document Type and Number:
Japanese Patent JP2010070791
Kind Code:
A
Abstract:

To provide a heat treatment furnace which can keep a stable nitriding quality for a long period of time.

The heat treatment furnace heats a steel material in a predetermined atmosphere to halogenate and nitride the steel material. An alloy containing 50 mass% to 80 mass% Ni and 0 mass% to 20 mass% Fe is used as a material that composes the surface of a structure in the furnace, which is exposed to a treatment space in which the steel material is nitrided. Thereby, the surface of the structure in the furnace hardly causes a nitriding reaction, and the heat treatment furnace can halogenate and nitride an article to be treated stably for a long period of time, and can stably form a nitrided layer on all steel materials including a steel type which is hard to be nitrided, according to the purpose of the treatment.


Inventors:
Watanabe, Takanori
Sakata, Tomohiro
Iwamura, Hideaki
Application Number:
JP2008000238174
Publication Date:
April 02, 2010
Filing Date:
September 17, 2008
Export Citation:
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Assignee:
AIR WATER INC
International Classes:
C23C8/26; C21D1/00; C21D1/06; C22C19/05; C23C8/02; C23C8/08; C23C8/32; F27B5/10; F27D3/12
Attorney, Agent or Firm:
森本 直之