COMBINED MATERIAL HAVING HIGH HARDNESS FOR TOOL

Japanese Patent JP3866305

B2

PURPOSE: To provide a combined material with high hardness for tool having extremely improved cutting properties, abrasion resistance and fracture resistance and a life much longer than that of a conventional tool by forming a hard heat-resistant coating film having a specific composition on the surface of a base comprising a CBN sintered material or a diamond sintered material.
CONSTITUTION: In a combined material with high hardness for tool having a base 2 comprising a CBN sintered material containing ≥20vol.% boron nitride of cubic system or a diamond sintered material containing ≥40vol.% of diamond, the material is provided with the following constitution. Namely, at least one layer of a hard heat-resistant coating film 1 consisting essentially of at least one element selected from C, N and O and Ti and Al is formed at a place participating in at least cutting. For example, a compound having a composition of the formula (TixAl1-x)N (0.3 ≤ x ≤ 0.5) is preferable as the hard heat-resistant coating film. The film thickness of the hard heat-resistant coating film is preferably 0.5-15μm. The combined material is optionally provided with an intermediate layer 3 or a surface layer 4.

Akatsuki Kukino
Tetsuo Nakai
Mitsuhiro Goto
Tsuyoshi Yoshioka
Makoto Setoyama

JP28737494A

January 10, 2007

October 27, 1994

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Sumitomo Electric Hardmetal Corp.

B23B27/14; B23B27/20; C04B41/87; C04B35/52; C04B35/583; C04B41/50; C04B41/52; C04B41/89; C22C26/00; C22C29/16; C23C14/06; C23C30/00; (IPC1-7): C04B41/87; B23B27/14; B23B27/20; C04B35/52; C04B35/583; C22C29/16; C23C14/06

JP3120352A
JP63176367A
JP5067705B2
JP59008679A

Takashi Koshiba

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