Efficient, abrasion-resistant and shock-resistant polycrystalline diamond compact
A technology of polycrystalline diamond and impact resistance, which is applied in earthwork drilling, drill bits, drilling equipment, etc. It can solve the problems of uneven surface of composite sheets, decline in impact resistance performance, and shortened service life, so as to achieve high drilling speed and improve impact resistance performance and increase the service life
Inactive Publication Date: 2012-07-25
JILIN UNIV
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Problems solved by technology
[0002] At present, there are many polycrystalline diamond composite sheet products at home and abroad. The surface of the polycrystalline diamond layer has various shapes, mainly to improve a certain performance of the composite sheet, or to increase the cutting efficiency of the composite sheet, or to improve the wear resistance of the composite sheet. Or enhance the impact resistance of the composite sheet, but improving one performance will reduce the other performance
For example, the application number is 201110001815.8 invention patent and ZL200620016041.0 utility model patent, mainly to improve the cutting efficiency of composite sheets, but due to the uneven surface of such composite sheets, the impact resistance performance has declined, and the service life will be reduced when cutting broken and complex rocks. Another example is the utility model patent No. 200820053178.2, which is mainly to increase the impact resistance of the composite sheet, but because the surface is spherical or arc-shaped, when cutting complete homogeneous rocks, the rock-breaking efficiency will decrease.
Method used
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Embodiment 1
[0016] see figure 1 and figure 2 As shown, in this embodiment, an anti-impact alloy layer 3 is added on the polycrystalline diamond layer 2, and the anti-impact alloy layer 3, the polycrystalline diamond layer 2 and the cemented carbide matrix layer 1 are combined together by a high temperature and high pressure method. The material of the anti-impact alloy layer 3 is hard alloy material, that is, YG6 alloy, and the thickness of the layer is 0.2-2 mm.
Embodiment 2
[0018] see image 3 and Figure 4 Shown, polycrystalline diamond layer 2 and anti-impact alloy layer 3 joint surfaces and anti-impact alloy layer 3 surface cross-sectional shapes are corrugated, and the axial direction of corrugated shape is consistent, and the corrugation of described corrugated is sinusoidal, and wavelength is 3mm, the amplitude is 0.5mm. The anti-impact alloy layer 3, the polycrystalline diamond layer 2 and the cemented carbide substrate layer 1 are bonded together by a high temperature and high pressure method.
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Abstract
The invention discloses an efficient, abrasion-resistant and shock-resistant polycrystalline diamond compact. A shock-resistant alloy layer is arranged on the surface of a polycrystalline diamond compact. Since a thin shock-resistant material layer is added to the surface of the polycrystalline diamond compact, the shock degree of the polycrystalline diamond compact can be reduced, shock resistance of the compact is enhanced, self-sharpening performance of polycrystalline diamond is improved, chip discharge environment of the polycrystalline diamond compact can be effectively improved by means of shock-resistant layers of different surface shapes, and shock resistance and cutting efficiency of the polycrystalline diamond compact can be improved. Applying the abrasion-resistant and shock-resistant polycrystalline diamond compact to a PDC (polycrystalline diamond compact) drill can enable the PDC drill to constantly keep quick drilling and improve abrasion quality of the compact, and by means of the shock resistance layer and the different surface shapes thereof, shock resistance, local hydraulic state, cutting conditions and the chip discharge environment of the PDC drill teeth can be improved, and rate of penetration is increased while the service life of the polycrystalline diamond compact is prolonged.
Description
technical field [0001] The invention belongs to the technical field of superhard composite materials, and relates to the drilling of soft to hard rocks, in particular to a PDC composite sheet suitable for various polycrystalline diamond (PDC) drill bits, and also to a PDC for metal cutting heads The composite sheet particularly relates to a high-efficiency wear-resistant and impact-resistant polycrystalline diamond composite sheet. Background technique [0002] At present, there are many polycrystalline diamond composite sheet products at home and abroad. The surface of the polycrystalline diamond layer has various shapes, mainly to improve a certain performance of the composite sheet, or to increase the cutting efficiency of the composite sheet, or to improve the wear resistance of the composite sheet. Or enhance the impact resistance of the composite sheet, but improving one performance will reduce the other performance. For example, the application number is 201110001815...
Claims
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IPC IPC(8): E21B10/46
Inventor 高科孙友宏谢晓波韩志武白文翔李小洋
Owner JILIN UNIV