DIAMOND COATED CEMENTED CARBIDE CUTTING TOOL

Title:

DIAMOND COATED CEMENTED CARBIDE CUTTING TOOL

Document Type and Number:

WIPO Patent Application WO/2018/174139

Kind Code:

A1

Abstract:

Provided is a diamond coated cemented carbide cutting tool, wherein (1) the average particle diameter of WC particles is 0.5 to 0.9 μm, (2) the maximum height difference (Rz) of the peaks and valleys of the boundary face of a substrate is 0.5 to 1.0 μm, the maximum distance (Δ) between peaks and valleys is 0.5 to 1.5 μm, and the length (Ye) of the diamond coating in a region in which the binder phase is removed is 0.5 to 2.0 μm, (3) WC particles for which L1 is 0.4 to 0.8 μm, L2 is 0.2 to 0.4 μm, and (L1)/(L2) is 1.5 to 2.5, are 70% or more of the area in the substrate boundary face, (4) the average particle diameter of diamond crystals in a region 0.5 to 1.5 μm from the substrate boundary face is 0.1 to 0.3 μm, and (5) there are columnar crystals for which the ratio of the angular deviation in the growth direction to the thickness direction within 10 degrees is 90% or more and/or the <110> orientation ratio is from 30 to 70%.

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Inventors:

SHIKADA SHINICHI (JP)
TOMINAGA AKIMITSU (JP)
TAKASHIMA HIDEAKI (JP)

Application Number:

PCT/JP2018/011328

Publication Date:

September 27, 2018

Filing Date:

March 22, 2018

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP (JP)

International Classes:

B23B27/14; B23B27/20; B23B51/00; B23C5/16; C01B32/26; C23C16/27

Foreign References:

JP2015030043A	2015-02-16
JP2006500235A	2006-01-05
JP2011020179A	2011-02-03
JPH06190609A	1994-07-12
US5855974A	1999-01-05
JP2017056084A	2017-03-23
JPH11193479A	1999-07-21
JP2002079406A	2002-03-19

Other References: