Artificial diamond hard alloy clad sheet
A synthetic diamond and cemented carbide technology, applied in drilling equipment, earthwork drilling, drill bits, etc., can solve problems such as poor wear resistance and thermal stability of synthetic diamond carbide composite sheets, insufficient cobalt removal depth, etc.
Pending Publication Date: 2020-11-27
ZHUHAI JUXIN TECH DEV
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Problems solved by technology
[0004] The problem existing in the existing artificial diamond hard alloy composite sheet is that because the acidic chemical liquid only reacts with the working surface and the outer peripheral surface of the artificial diamond layer, the insufficient depth of cobalt removal leads to the wear resistance and poor thermal stability
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[0026] see figure 1 and figure 2 , figure 1 It is the structure diagram of the first viewing angle of the embodiment of the artificial diamond cemented carbide compact of the present invention. figure 2 It is a structural diagram of the second viewing angle of the embodiment of the synthetic diamond cemented carbide compact of the present invention. The synthetic diamond carbide composite sheet is cylindrical as a whole, and the z-axis direction in the figure is the thickness direction of the synthetic diamond carbide composite sheet. In the thickness direction, the synthetic diamond carbide composite sheet is composed of hard alloy layers 1 Composed of artificial diamond layer 2, hard alloy layer 1 is used as a hard alloy matrix, artificial diamond powder is pressed onto the hard alloy layer 1 by high temperature and high pressure to form a synthetic diamond hard alloy composite sheet. Compared with the cemented carbide layer 1, the artificial diamond layer 2 is thinner....
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Abstract
The invention provides an artificial diamond hard alloy clad sheet which comprises a hard alloy layer and an artificial diamond layer arranged sequentially. The artificial diamond layer is provided with a working surface back on to the hard alloy layer; the artificial diamond hard alloy clad sheet is provided with multiple permeation holes in the working surface; the permeation holes are blind holes located in the artificial diamond layer and extend along the thickness direction of the artificial diamond layer; and the multiple permeation holes are arranged along the periphery of the artificial diamond layer in a surrounding way. Through forming the permeation holes in the working surface, de-cobalt acid chemical liquid can enter, so that the contact area of the chemical liquid and the artificial diamond layer is increased; and in addition, the permeation holes extend along the depth direction of the artificial diamond layer, so that a de-cobalt area is increased in the depth direction, and the wear resistance and the heat stability of whole artificial diamond layer are improved.
Description
technical field [0001] The invention relates to the technical field of synthetic diamond hard alloy composite sheets, in particular to an artificial diamond hard alloy composite sheet with permeable hole groups on the working surface. Background technique [0002] Synthetic diamond carbide composite sheet, also known as polycrystalline diamond composite sheet, is a superhard material made of artificial diamond and cemented carbide under high temperature and high pressure. It not only has the high hardness and high wear resistance of diamond, but also has High impact resistance of cemented carbide. Synthetic diamond carbide composite sheets are widely used as high-efficiency cutting materials in the fields of oil drilling, natural gas drilling, geological exploration and machining. [0003] After the synthetic diamond cemented carbide composite sheet is formed, it is also necessary to decobalt the synthetic diamond layer to improve wear resistance and thermal stability. An ...
Claims
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IPC IPC(8): E21B10/56B22F7/00B22F7/08
CPCE21B10/56B22F7/004B22F7/08
Inventor 许洪新彭清戴文久
Owner ZHUHAI JUXIN TECH DEV