Title:
VACUUM CARBURIZING METHOD FOR Cr AND/OR Mn-CONTAINING STEEL PARTS
Document Type and Number:
Japanese Patent JP3442737
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce carburizing treatment time for a Cr and/or Mn-containing steel parts made of SCR material, SCM material, SNCM material, stainless steel or the like, and to form a uniform carburized layer without complicating equipment and increasing the cost.
SOLUTION: In the vacuum carburizing treatment for the Cr and/or Mn- containing steel parts, the steel parts are heated to a carburizing temperature in a nonoxidizing atmosphere, then held under the feed of gaseous hydrocarbon and at the carburizing temperature under the pressure capable of reducing Cr oxide or Mn oxide for a prescribed time. Thereafter, a prescribed amount of carburizing gas is fed to carbonize the steel parts under the reduced pressure.
Inventors:
Hitoshi Ohta
Toshiyuki Matsuura
Teruyoshi Hirabayashi
Toshiyuki Matsuura
Teruyoshi Hirabayashi
Application Number:
JP2000375850A
Publication Date:
September 02, 2003
Filing Date:
December 11, 2000
Export Citation:
Assignee:
Chugai Furnace Industry Co., Ltd.
International Classes:
C23C8/22; C21D1/06; C21D1/773; C23C8/02; C23C8/80; (IPC1-7): C23C8/22; C23C8/02
Domestic Patent References:
| JP598417A | ||||
| JP649619A | ||||
| JP2000192106A | ||||
| JP61104066A |
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)
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