Title:
超硬工具及びその製造方法
Document Type and Number:
Japanese Patent JP6569376
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a hard metal tool having excellent tool life.SOLUTION: A hard metal tool 1 has a sintered body 2. The sintered body 2 contains a cemented carbide component and a nitride production component. The cemented carbide component consisting 2 or more kinds selected from a group consisting of WC, Co, TiC and TaC and contains at least WC and Co. The nitride production component consists of 2 or more kinds selected from a first group and a second group and contains at least one kind selected from the first group and one kind selected from the second group. The total content of the nitride production component is 2.0 to 5.0 mass% based on 100 mass% of the cemented carbide component. The sintered body 2 has a nitride layer 3 containing nitride of the above described nitride production component on a surface layer. The nitride layer 3 has a process hardened layer 4 containing nitride of the above described nitride production component on a surface layer. The first group:Al, V and Si. The second group:Cr, Mo and Zr.SELECTED DRAWING: Figure 1
Inventors:
Osamu Kanda
Takuya Matsumoto
Landlord Kenshiro
Takuya Matsumoto
Landlord Kenshiro
Application Number:
JP2015159753A
Publication Date:
September 04, 2019
Filing Date:
August 13, 2015
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B22F3/24; B23B27/14; B23B51/00; C04B35/56; C22C1/05; C22C29/08; C22C32/00; C23C8/24
Domestic Patent References:
| JP2012045661A | ||||
| JP2254144A | ||||
| JP7026368A | ||||
| JP2007056333A | ||||
| JP56150184A | ||||
| JP2002210525A | ||||
| JP2008264988A | ||||
| JP2007268656A | ||||
| JP2016078136A |
Foreign References:
| US20090098372 |
Attorney, Agent or Firm:
Ascend Patent Business Corporation