Title:
cBN SINTERED BODY AND CUTTING TOOL
Document Type and Number:
Japanese Patent JP2021151943
Kind Code:
A
Abstract:
To provide a cubic boron nitride (cBN) sintered body and a cutting tool having crack propagation resistance and stability against thermal loads even in intermittent cutting process with depth of cut exceeding 0.1 mm.SOLUTION: A cBN sintered body and a cutting tool comprising 40 to 80 area% of cBN, and a binding phase comprising α and β phases, wherein the α phase is (Ti1-xVx) (C1-yNy) with an average composition of x=0.30-0.70, y=0.00-0.50, and 70-97 area% in the bound phase, and the β phase is a type of Al oxide, nitride, or boride with an average grain size of 0.05-0.40 μm, and 3-20 area% in the binder phase; and wherein the alpha phase has an A region and a B region, and the A region is (Ti1-xAVxA)(C1-yANyA), in which xA=0.10-0.30 and yA=0.00-0.50, and the B region is (Ti1-xBVxB)(C1-yBNyB) in which xB=0.70-0.90 and yB=0.00-0.50, and the sum of the A and B regions is more than 50 area% percent of the α phase.SELECTED DRAWING: Figure 1
Inventors:
TAKEI RYOTA
OKADA KAZUKI
OKADA KAZUKI
Application Number:
JP2020053654A
Publication Date:
September 30, 2021
Filing Date:
March 25, 2020
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
C04B35/5835; B23B27/14; B23B27/20
Attorney, Agent or Firm:
Kimura Koichi
Yasushi Yamada
Kageyama Shuichi
Yasushi Yamada
Kageyama Shuichi