Title:
COATED POLYCRYSTALLINE CBN TOOL
Document Type and Number:
WIPO Patent Application WO/2012/005275
Kind Code:
A1
Abstract:
Provided is a coated polycrystalline cBN tool which exhibits improved abrasion resistance and improved breakage resistance and has a tool life longer than that of a conventional tool. A coated polycrystalline cBN tool which consists of both a base of a sintered cBN compact and a coating layer lying on the surface of the base, characterized in that: the sintered cBN compact consists of 73 to 84vol% of cBN and 16 to 27vol% of a binder phase and unavoidable impurities; the cBN has a mean particle diameter of 1.5 to 4.0μm; the average of thickness of the binder phase is 0.05 to 0.5μm; the standard deviation of thickness of the binder phase is 0.5μm or less; and the coating layer comprises an upper layer consisting of Ti(CxN(1-x)), an intermediate layer consisting of a metal, a lower layer consisting of an alternating laminate composed of (Ti(1-y)Siy)N thin layers and (Al(1-z)Crz)N thin layers, and a lowermost layer consisting of (Al(1-a)Cra)N.
Inventors:
KUDO, Takahide (())
工藤 貴英 (())
MIURA, Hiroyuki (())
工藤 貴英 (())
MIURA, Hiroyuki (())
Application Number:
JP2011/065424
Publication Date:
January 12, 2012
Filing Date:
July 06, 2011
Export Citation:
Assignee:
TUNGALOY CORPORATION (11-1, Yoshima-Kogyodanchi Iwaki-sh, Fukushima 44, 〒9701144, JP)
株式会社タンガロイ (〒44 福島県いわき市好間工業団地１１－１ Fukushima, 〒9701144, JP)
KUDO, Takahide (())
工藤 貴英 (())
株式会社タンガロイ (〒44 福島県いわき市好間工業団地１１－１ Fukushima, 〒9701144, JP)
KUDO, Takahide (())
工藤 貴英 (())
International Classes:
B23B27/14; B23B27/20; C04B35/583; C04B41/89; C23C14/06
Attorney, Agent or Firm:
TSUKUNI, Hajime (KASUMIGASEKI TOKYU Bldg, 3-7-1 Kasumigaseki, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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Claims:
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