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Title:
CUTTING TOOL SINTERED ALLOY
Document Type and Number:
WIPO Patent Application WO/2016/111452
Kind Code:
A1
Abstract:
The present invention relates to a cutting tool sintered alloy, which is a Ti-based sintered alloy (hereinafter, referred to as "cermet") having a structure in which a core comprises a hard phase and a rim encompasses the core, and is capable of obtaining improved tool lifespan compared with a conventional cermet by controlling the hardness profile in a predetermined thickness range from the surface to the inside of a base material and a state of the core-rim structure. According to the present invention, the cutting tool sintered alloy is a sintered alloy obtained by sintering a material powder comprising: 40-94 wt% of a carbonitride containing Ti; 5-20 wt% of one or more metals selected from Fe, Co and Ni; and 1-40 wt% of a carbide or a carbonitride of one or more metals selected from groups IVa, Va and VIa metals in the periodic table, or a mixture thereof, wherein a functionally graded layer is formed from the surface to a depth of 80-150 μm, the maximum content of Ti is 50 wt% or more in the Ti composition profile from the surface to a depth of 5.0 μm, and the hardness from the surface to a depth of 20 μm is 90% or more of the surface hardness.

Inventors:
KIM, Hong-eun (55 Sandan-ro, Heungdeok-gu,Cheongju-si, Chungcheongbuk-do, 28589, KR)
OH, Se-ung (55 Sandan-ro, Heungdeok-gu,Cheongju-si, Chungcheongbuk-do, 28589, KR)
LEE, Dae-ki (55 Sandan-ro, Heungdeok-gu,Cheongju-si, Chungcheongbuk-do, 28589, KR)
AHN, Sun-yong (55 Sandan-ro, Heungdeok-gu,Cheongju-si, Chungcheongbuk-do, 28589, KR)
KIM, Young-heum (55 Sandan-ro, Heungdeok-gu,Cheongju-si, Chungcheongbuk-do, 28589, KR)
Application Number:
KR2015/012056
Publication Date:
July 14, 2016
Filing Date:
November 10, 2015
Export Citation:
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Assignee:
KORLOY INC. (1350, Nambusunhwan-ro,Geumcheon-gu, Seoul, 08536, KR)
International Classes:
C22C29/04; B22F3/10
Foreign References:
JP2009030130A2009-02-12
KR20080077849A2008-08-26
KR20060111103A2006-10-26
KR20130060542A2013-06-10
JP2002292507A2002-10-08
Attorney, Agent or Firm:
IAM PATNET FIRM (403 224, Bongeunsa-ro,Gangnam-gu, Seoul, 06135, KR)
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