Title:
SURFACE-COATED CUTTING TOOL WITH HARD COATING LAYER SHOWING EXCELLENT WEAR RESISTANCE AND CHIPPING RESISTANCE IN HIGH-SPEED CUTTING WORK
Document Type and Number:
Japanese Patent JP2015066644
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a surface-coated cutting tool which is excellent in chipping resistance and wear resistance.SOLUTION: There is provided the surface-coated cutting tool in which a hard coating layer with an average thickness of 1.0 to 10 μm is vapor-deposited on a surface of a tool base constituted of a WC-based alloy. In the surface-coated cutting tool, (a) the hard coating layer includes a compound nitride layer of Al and Ti and the Al content rate with respect to the total amount of Al and Ti in the layer is 0.65 to 0.75 (atomic ratio), and (b) in the range up to the position which is apart by 100 μm from the blade tip on a flank surface, the hard coating layer is lamination or alternative lamination of a thin layer A constituted of a cubic crystal structure only in which the crystal grain size length proportion of fine crystal grains of the grain size less than 0.1 μm is 50 to 90% and a thin layer B constituted of the mixture of a cubic crystal structure and a hexagonal crystal structure in which the proportion is 10 to 50%.
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Inventors:
KIMURA TAKAYUKI
TAKAHASHI MASAKUNI
SENBOKUYA KAZUAKI
TANAKA KOICHI
TAKAHASHI MASAKUNI
SENBOKUYA KAZUAKI
TANAKA KOICHI
Application Number:
JP2013203960A
Publication Date:
April 13, 2015
Filing Date:
September 30, 2013
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
B23B27/14; B23B51/00; B23C5/16
Attorney, Agent or Firm:
Kageyama Shuichi
Masayuki Miyake
Kurachi Yasuyuki
Kazuo Tomita
Masayuki Miyake
Kurachi Yasuyuki
Kazuo Tomita