Title:
PARTIALLY CARBURIZED HEAT TREATED STAINLESS FERRULE, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2015/060552
Kind Code:
A1
Abstract:
According to one aspect of the present invention, provided is a partially carburized heat treated stainless ferrule, wherein a first region has a first hardness, a second region has a second hardness, the first region comprises: a nitrogen layer in which the concentration of nitrogen is greater than that of carbon; and a carbon layer provided inside the nitrogen layer in which the concentration of carbon is greater than that of nitrogen, and the first hardness is greater than the second hardness. Through such partial heat treatment, the front portion of a region excluding a part to be heat treated is cured by heat treatment, thereby preventing a phenomenon in which rotational torque increases.
Inventors:
JUNG SAM RAE (KR)
NOH EUN SIK (KR)
NOH EUN SIK (KR)
Application Number:
PCT/KR2014/008936
Publication Date:
April 30, 2015
Filing Date:
September 25, 2014
Export Citation:
Assignee:
DK LOK CORP (KR)
JUNG SAM RAE (KR)
JUNG SAM RAE (KR)
International Classes:
C23C8/54
Foreign References:
| KR20010072424A | 2001-07-31 | |||
| KR100998055B1 | 2010-12-03 | |||
| KR101166673B1 | 2012-07-24 | |||
| KR20000027040A | 2000-05-15 |
Attorney, Agent or Firm:
LEE, JOON SUNG (KR)
이준성 (KR)
이준성 (KR)
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