DRILL TIP AND DRILL BIT - MITSUBISHI MATERIALS CORP

Title:

DRILL TIP AND DRILL BIT

Document Type and Number:

WIPO Patent Application WO/2016/084914

Kind Code:

A1

Abstract:

This drill tip performs drilling when attached to the leading end of a drill bit, and comprises a tip main body and a hard layer which is coated on at least the leading end of the tip main body and is formed from a hard diamond sintered body harder than the tip main body, wherein, from the surface side to the tip main body side of the hard layer, the hard layer comprises at least two high-hardness layers and, arranged between said high-hardness layers, a low-hardness layer which has a hardness lower than that of the high-hardness layers.

More Like This:

WO/2010/099512	DRILL BIT FOR EARTH BORING
WO/2017/070993	ALLOY DRILL AND MANUFACTURING METHOD THEREOF

Inventors:

AKHMADI EKO WARDOYO (JP)
MATSUO TOSHIHIKO (JP)
SAKURAZAWA CHIHIRO (JP)

Application Number:

PCT/JP2015/083276

Publication Date:

June 02, 2016

Filing Date:

November 26, 2015

Export Citation:

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Assignee:

MITSUBISHI MATERIALS CORP (JP)

International Classes:

E21B10/46

Domestic Patent References:

WO2013064433A2

2013-05-10

Foreign References:

JP2013513031A	2013-04-18
US6315065B1	2001-11-13
US9097111B2	2015-08-04
US20140060937A1	2014-03-06
JPS63295482A	1988-12-01

Other References: