Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CONTINUOUS NITRIDING TREATMENT FURNACE AND CONTINUOUS NITRIDING TREATMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2018/062290
Kind Code:
A1
Abstract:
Provided is a continuous nitriding treatment furnace, wherein: the continuous nitriding treatment furnace is provided with a nitriding chamber, a heater, a first nitriding zone, and a second nitriding zone that is at a temperature 25-150°C lower than the temperature of atmospheric gas in the first nitriding zone; a configuration is adopted such that the atmospheric gas in the first nitriding zone flows into the second nitriding zone; and a configuration is adopted such that an iron nitride compound layer comprising an ε phase or comprising an ε phase and a γ' phase is formed on the surface of a steel member in the first nitriding zone, and a nitriding treatment for causing a γ' phase to precipitate on the iron nitride compound layer is performed in the second nitriding zone.

Inventors:
SHIMIZU KATSUSHIGE (JP)
HATANAKA HOKUTO (JP)
SUN BIN (JP)
KAWAHARA MASAKAZU (JP)
Application Number:
JP2017/034998
Publication Date:
April 05, 2018
Filing Date:
September 27, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DOWA THERMOTECH CO LTD (JP)
International Classes:
C23C8/26; C21D9/32; C22C38/00; C22C38/18; F27B9/04
Domestic Patent References:
WO2015046593A12015-04-02
Foreign References:
JP2016065263A2016-04-28
JPH04214852A1992-08-05
JP2013227674A2013-11-07
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (JP)
Download PDF: