CUTTING TOOL OF SURFACE-COATED CEMENTED CARBIDE WITH ABRASION-RESISTANT COAT LAYER HAVING EXCELLENT ADHESION PERFORMANCE AND CHIPPING RESISTANCE

Japanese Patent JP3829322

B2

PROBLEM TO BE SOLVED: To provide a cutting tool of surface-coated cemented carbide with an abrasion-resistant coat layer having excellent adhesion performance and chipping resistance.
SOLUTION: On the surface of carbonized WC cemented carbide base material having an amorphous layer in a range of 1-50 nm from the surface formed by arc ion plating surface treatment, the abrasion-resistant coat layer is formed by physical vapor deposition. It is composed of (a) a primer tough layer comprising a titanium nitride layer with 0.1-5 μm average layer thickness, (b) a surface hard layer comprising a single layer or plural layers of a composite nitride layer and a composite carbon nitride layer satisfying a composition formula of (Ti1-XAlX)N and a composition formula of (Ti1-XAlX)C1-YNY (X is 0.15-0.65; and Y is 0.5-0.99 in atomic ratio), and having 0.5-15 μm average layer thickness, and (c) an upper hard layer comprising a single layer or plural layers of an Al oxide layer and an Al oxide-zirconium oxide mixed layer comprising zirconium oxide phase dispersed in Al oxide base, and having 0.5-10 μm average layer thickness.

Yasuhiko Tashiro
Tsuneki Okada
Nakamura Keishi

JP2002023095A

October 04, 2006

January 31, 2002

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Mitsubishi Materials Corporation

B23B27/14; B23C5/16; B23B51/00; C23C14/06; C23C14/08; C23C14/16; C23C16/36; (IPC1-7): B23B27/14; B23B51/00; B23C5/16; C23C14/06; C23C14/08; C23C14/16; C23C16/36

JP60224778A
JP9295204A
JP2001219306A
JP2003080405A
JP2003080406A
JP2003103406A
JP2003145318A

Kazuo Tomita
Kutaro Kamoi
Kageyama Shuichi

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