NITROGEN-CONTAINING CERMET - SUMITOMO ELECTRIC INDUSTRIES

Title:

NITROGEN-CONTAINING CERMET

Document Type and Number:

WIPO Patent Application WO/1990/010090

Kind Code:

A1

Abstract:

A cermet drill consisting of cermet composed of a hard dispersed phase and a combined metal phase is disclosed. The hard dispersed phase contains a titanium-containing metal atom group and a nitrogen-containing nonmetal atom group. The quantity of the titanium in the metal atom group ranges from 0.5 to 0.95 (both inclusive, the same applies hereinbelow) in terms of an atomic ratio. The quantity of the nitrogen in the nonmetal atom group ranges from 0.1 to 0.7 in terms of atomic ratio. The hard dispersed phase has a minute particle group of an average particle diameter of from 0.2 to 0.6 $g(m)m and a coarse particle group of an average particle diameter of from 1 to 3 $g(m)m. The volume ratio of the minute particle group to the coarse particle group ranges from 0.3 to 3. The weight percentage of the combined metal phase in the cermet ranges from 5 to 30. This cermet drill exhibits a high abrasion resistance, a high tenacity and a high thermal cracking resistance.

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Inventors:

ISOBE KAZUTAKA (JP)
NOMURA TOSHIO (JP)

Application Number:

PCT/JP1990/000200

Publication Date:

September 07, 1990

Filing Date:

February 21, 1990

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)

International Classes:

B23B51/00; C22C29/02; C22C29/04; (IPC1-7): B23B27/14; B23B51/00; C22C29/02; C22C29/16

Foreign References:

JPS63297537A	1988-12-05
JPS63109139A	1988-05-13
JPH06112846A	1994-04-22
JPS60208447A	1985-10-21

Other References: