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Method of machining a substrate

A machining and substrate technology, applied in the direction of stone processing equipment, stone processing tools, metal processing equipment, etc., can solve problems such as uneconomical and low cutting speed

Inactive Publication Date: 2010-03-24
ELEMENT SIX PRODION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since PCD begins to graphitize at around 700°C, this limits its use to lower cutting speeds when machining ferrous materials, making it uneconomical in some applications relative to carbide tools

Method used

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  • Method of machining a substrate
  • Method of machining a substrate
  • Method of machining a substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A mass of diamond particles is placed on a cemented carbide substrate with cobalt as a binder phase. This unbonded mass is placed in a molybdenum shell, and the shell is placed in the reaction zone of a conventional high pressure / high temperature plant. The contents of the housing are subjected to a temperature of about 1400°C and a pressure of about 5 GPa. These conditions are maintained long enough to produce a polycrystalline diamond layer having a surface bonded to the cemented carbide substrate and an opposite exposed surface. The polycrystalline diamond layer has a cobalt-containing second phase.

[0049] The shell is removed from the reaction zone. The molybdenum / molybdenum carbide layer is bonded to the outer surface of the polycrystalline diamond. The outer regions of the molybdenum / molybdenum carbide layer are removed by grinding, leaving a thin layer of material softer than polycrystalline diamond bonded to one of the major surfaces of the polycrystalline ...

Embodiment 2

[0052] A mass of diamond particles is placed on a cemented carbide substrate with cobalt as a binder phase. The average size (in equivalent diameter) of the diamond particles was about 6 microns (measured using a Malvern Mastersizer), and most particles were larger than about 2 microns and smaller than about 22 microns. The unbonded mass was placed in a niobium shell having an average wall thickness of about 250 microns, and the niobium shell itself was placed in a titanium shell having walls of about 150 microns thick. This doubly encapsulated reaction mass is placed in the reaction zone of conventional high pressure / high temperature equipment. The contents of the housing are subjected to a temperature of about 1400°C and a pressure of about 5 GPa. These conditions are maintained for a sufficient time to produce a polycrystalline diamond layer having a surface bonded to the cemented carbide substrate and an opposite exposed surface. This pressure and temperature cycle is t...

Embodiment 3

[0064] Another set of PCD tool inserts were fabricated and tested as in Example 2, except that the average size of the diamond particles was about 12 microns and the majority of the particles were larger than about 2 microns and less than about 25 microns in size. Sandstone milling test results are shown in Table 2 (distance to failure rounded to the nearest 50mm).

[0065] Table 2

[0066] Softer layer thickness (microns)

Failure distance (mm)

0

2,600

10

2,900

50

4,550

150

4,800

[0067] These results show the advantage of using a thicker, softer layer.

[0068] Again, no systematic difference in wear performance was observed.

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Abstract

The invention provides for a method of machining a substrate which includes the step of machining the substrate in an interrupted machining, impact machining or combination thereof operation using a tool which includes a tool component comprising a layer of polycrystalline diamond (12) having a working surface (16), a softer layer (20) containing a metal and bonded to the working surface (16) of the polycrystalline diamond layer (12) along an interface, the region (22) of the layer of poiycrystalline diamond (12) adjacent the interface containing some metal from the softer layer (20).

Description

Background technique [0001] The present invention relates to a method of machining a substrate. [0002] Superabrasive cutting elements or tool parts utilizing diamond compacts (also known as polycrystalline diamond (PCD)) and cubic boron nitride compacts (also known as PCBN) are widely used in drilling, milling, cutting and other such in grinding applications. The component or tool part typically comprises a PCD or PCBN layer bonded to a carrier, typically a cemented carbide carrier. The PCD or PCBN layer may exhibit sharp cutting edges or points or cutting or abrasive surfaces. [0003] PCD includes diamond particle materials containing substantial amounts of direct diamond-to-diamond bonds. The PCD will typically have a second phase comprising a diamond catalyst / solvent such as cobalt, nickel, iron or an alloy comprising one or more of these metals. The PCBN also typically contains a binder phase, which is typically a cBN catalyst or contains such a catalyst. Examples ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/12B23C5/20
CPCB22F7/06B23B27/20B23B2228/10B23B27/141B23B2226/315B22F2005/001C22C26/00E21B10/567C22C2204/00B22F2005/002B23C2228/10B28D1/02B23C2226/315Y10T409/303752Y10T82/10Y10T408/03Y10T83/04
Inventor C·J·比勒陀利乌斯P·M·哈登
Owner ELEMENT SIX PRODION
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