Title:
METHOD FOR FORMING HARD LAYER ON TITANIUM, AND TALLOY HAVING HARD LAYER FORMED BY SAME
Document Type and Number:
WIPO Patent Application WO/2013/141422
Kind Code:
A1
Abstract:
The present invention relates to a method for forming a hard layer, having excellent and functionally gradient properties, on the surface of titanium at low cost. According to the present invention, the method for forming the hard layer comprises the steps of: (a) inserting the titanium in a heat treatment device, ventilating the same, and maintaining the air pressure to be 10-4 torr or less; (b) preprocessing the titanium by heating the same at 730 ~ 800℃ for 10 min.~ 5 hours and removing the oxide film formed on the surface of the titanium; (c) injecting one or more gases selected from nitrogen, oxygen, and carbon into the heat treatment device and heating the titanium at 740 ~ 950℃ for 30 min.~20 hours, thereby forming the hard layer, having a density nine times greater than the gas, on the surface of the talloy; and (d) cooling the titanium.
Inventors:
LEE DONG GEUN (KR)
LEE YONG TAI (KR)
LEE YONG TAI (KR)
Application Number:
PCT/KR2012/002146
Publication Date:
September 26, 2013
Filing Date:
March 23, 2012
Export Citation:
Assignee:
KOREA MACH & MATERIALS INST (KR)
LEE DONG GEUN (KR)
LEE YONG TAI (KR)
LEE DONG GEUN (KR)
LEE YONG TAI (KR)
International Classes:
C23C8/24; C22C14/00; C23C8/02; C23C8/80
Foreign References:
| JP2001301400A | 2001-10-31 | |||
| JP2001081544A | 2001-03-27 | |||
| JPH05331617A | 1993-12-14 | |||
| KR100773886B1 | 2007-11-06 |
Other References:
JEONG, HYEON GYEONG ET AL.: "Improvement of Surface Properties of CP-Titanium by Thermo-Chemical Treatment (TCT) Process", KOREAN JOURNAL OF METALS AND MATERIALS, vol. 49, no. 9, 25 September 2011 (2011-09-25), pages 692 - 698
Attorney, Agent or Firm:
IAM PATENT FIRM (KR)
특허법인아이엠 (KR)
특허법인아이엠 (KR)
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