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SURFACE-COATED CUBIC BORON NITRIDE SINTERED MATERIAL TOOL
The present invention is directed to a surface-coated cubic boron nitride sintered material tool including a cBN substrate and a hard coating layer formed on a surface of the cBN substrate and having an alternate laminated structure of A layer and B layer. A peak of the grain size distribution of cBN grains in the cBN sintered material is present within a range of a grain size from 0.50 to 1.00 μm. The A layer has a composition of (Ti1-xAlx)N (0.4≤x≤0.7 in an atomic ratio). The B layer has a composition of (Cr1-y-zAlyMz)N (0.03≤y≤0.6 and 0≤z≤0.05 in an atomic ratio). An X-ray diffraction peak of a (200) plane is present at a position of a diffraction angle of 43.6 plus or minus 0.1 degrees, and a plastic deformation work ratio of the B layer is 0.35 to 0.50.
SURFACE-COATED CUBIC BORON NITRIDE SINTERED MATERIAL TOOL
The present invention is directed to a surface-coated cubic boron nitride sintered material tool including a cBN substrate and a hard coating layer formed on a surface of the cBN substrate and having an alternate laminated structure of A layer and B layer. A peak of the grain size distribution of cBN grains in the cBN sintered material is present within a range of a grain size from 0.50 to 1.00 μm. The A layer has a composition of (Ti1-xAlx)N (0.4≤x≤0.7 in an atomic ratio). The B layer has a composition of (Cr1-y-zAlyMz)N (0.03≤y≤0.6 and 0≤z≤0.05 in an atomic ratio). An X-ray diffraction peak of a (200) plane is present at a position of a diffraction angle of 43.6 plus or minus 0.1 degrees, and a plastic deformation work ratio of the B layer is 0.35 to 0.50.
SURFACE-COATED CUBIC BORON NITRIDE SINTERED MATERIAL TOOL
MAEKAWA TAKUYA (author) / TAKAHASHI MASAKUNI (author) / SATO SHUN (author) / YUMOTO KENJI (author)
2019-04-18
Patent
Electronic Resource
English
SURFACE-COATED CUBIC BORON NITRIDE SINTERED MATERIAL TOOL
| European Patent Office | 2019
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