Title:
SURFACE-COATED CUTTING TOOL PROVIDING EXCELLENT CHIPPING RESISTANCE AND WEAR RESISTANCE IN STRONG INTERMITTENT CUTTING WORK
Document Type and Number:
WIPO Patent Application WO/2017/038618
Kind Code:
A1
Abstract:
Provided is a surface-coated cutting tool in which a hard coating layer comprising an alternating laminated structure of an A layer (1) and a B layer (2) is provided to a surface of a tool base (3), wherein the A layer (1) has a component composition of (Ti1-zAlz)N (where the atomic ratio is 0.4≤z≤0.7), and the B layer (2) has a component composition of (Cr1-x-yAlxMy)N (where the atomic ratio is 0.03≤x≤0.4, 0≤y≤0.05, M represents at least one element selected from: a Group 4a, 5a, or 6a element of the periodic table excluding Cr; B; and Si). The layer thickness tA of the A layer (1) and the layer thickness tB of the B layer (2) satisfy 0.67≤tB/tA≤2.0, the lattice constant a of crystal grains of the entire hard coating layer comprising the A layer (1) and the B layer (2) satisfies 4.10≤a≤4.20, the X-ray diffraction peak intensity ratio of a (200) surface and a (111) surface of the entire hard coating layer satisfies 2.0≤I(200)/I(111)≤10. Further, the plastic deformation work ratio Wplast/(Wplast+Welast) of the B layer (2) lies within the range of 0.35-0.50.
Inventors:
SATO SHUN (JP)
TAKAHASHI MASAKUNI (JP)
TAKAHASHI MASAKUNI (JP)
Application Number:
PCT/JP2016/074805
Publication Date:
March 09, 2017
Filing Date:
August 25, 2016
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP (JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16; C23C14/06; C23C14/48
Domestic Patent References:
| WO2006070509A1 | 2006-07-06 |
Foreign References:
| JP2012097303A | 2012-05-24 | |||
| JP2014091169A | 2014-05-19 | |||
| JP2011218513A | 2011-11-04 |
Other References:
PING LI: "Microstructure, mechanical and thermal properties of TiAlN/CrAlN multilayer coatings", INT. JOURNAL OF REFRACTORY METALS AND HARD MATERIALS, vol. 40, 2013, pages 51 - 57, XP055367773
See also references of EP 3342512A4
See also references of EP 3342512A4
Attorney, Agent or Firm:
SHIGA Masatake et al. (JP)
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