FIELD: drill bits, particularly characterized by wear resisting parts, for example, diamond inserts.
SUBSTANCE: abrasive material layer has inner part cooperating with base surface, the first intermediate part brought into contact with inner part, the second intermediate part touching the first one and outer part brought into contact with the second intermediate part. Outer part includes super-hard abrasive particles having at least three different dimensions. Inner, the first and the second intermediate parts are made of differing compositions.
EFFECT: provision of stepped change of abrasive material layer expansion between base and outer part thereof.
18 cl, 7 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ABRASIVE TOOL | 2007 |
|
RU2447985C2 |
| ABRASIVE COMPACTS | 2007 |
|
RU2453623C2 |
| ULTRAHARD DIAMOND COMPOSITES | 2008 |
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RU2463372C2 |
| ABRASIVE MATERIALS WITH COATING | 2005 |
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RU2368489C2 |
| METHOD OF PRODUCING POLYCRYSTALLINE COMPOSITE MATERIAL | 2011 |
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RU2525005C2 |
| ABRASIVE COMPACT FROM POLYCRYSTALLINE DIAMOND | 2007 |
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| COMPOSITE INSERTS WITH POLYCRYSTALLINE DIAMONDS | 2010 |
|
RU2503522C2 |
| CUTTING TOOL BASED ON POLYCRYSTALLINE CUBIC BORON NITRIDE AND METHOD OF MANUFACTURING THEREOF (VERSIONS) | 1996 |
|
RU2161087C2 |
| COATED ABRASIVES | 2005 |
|
RU2372371C2 |
| INSERT FOR CRUSHING TOOL, METHOD OF ITS PRODUCTION AND TOOL WITH SAID INSERT | 2009 |
|
RU2532932C2 |
