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Patent Searching and Data


Title:
HEAT TREATMENT FURNACE
Document Type and Number:
WIPO Patent Application WO/2021/039677
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a heat treatment furnace for quenching that makes it possible to forgo the used of a converted gas and suitably prevent the appearance of a modified layer resulting from decarburization or the like in the surface of a treated object such as steel. A heat treatment furnace (10) according to one embodiment of the present invention is provided with: a gas supply unit (26) configured so as to supply a neutral gas or an inactive gas to a quenching heating chamber (12); and an internal structure such as a muffle (34) in the quenching heating chamber that is at least partially made from a graphite-based material.

Inventors:
TAKAHASHI SHINICHI (JP)
KANDA KIICHI (JP)
Application Number:
JP2020/031745
Publication Date:
March 04, 2021
Filing Date:
August 22, 2020
Export Citation:
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Assignee:
KANTO YAKIN KOGYO CO LTD (JP)
International Classes:
F27B9/04; C21D1/18; C21D1/63; C21D1/76; F27B9/06; F27B9/34; F27D7/06
Foreign References:
JP5517382B12014-06-11
JPS4942778B11974-11-16
JPH0411786B21992-03-02
JPH09101086A1997-04-15
Attorney, Agent or Firm:
YAMAZAKI Akihiro (JP)
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