Cobalt removal device for polycrystalline diamond compact and cobalt removal method applying cobalt removal device

A technology of polycrystalline diamond and composite sheet is applied in the field of decobalt device of polycrystalline diamond composite sheet, which can solve the problems of fluctuation, shorten the time of decobalt treatment, and easily corrode the cemented carbide substrate, so as to reduce and improve the sealing requirements. Stability, impact weakening effect

Active Publication Date: 2022-08-09
武汉锐特金刚石有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the related technologies mentioned above, the inventor believes that there is the following defect: when using the cobalt removal solution to decobalt the polycrystalline diamond compact, not only the hard The risk of the high-quality alloy substrate being easily corroded, and the greater the decobalt depth required by the design, the longer the actual decobalt treatment time will be. Osmotic activity of acid ions in polycrystalline diamond for shorter decobalt treatment duration
However, after ultrasonic vibration is used, the liquid level of the decobalt solution will inevitably fluctuate, which will affect the control of the cobalt removal depth of the polycrystalline layer, and even lead to the phenomenon of uneven decobalt depth of the polycrystalline layer, which will eventually affect Consistency of wear resistance of polycrystalline diamond compact

Method used

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  • Cobalt removal device for polycrystalline diamond compact and cobalt removal method applying cobalt removal device
  • Cobalt removal device for polycrystalline diamond compact and cobalt removal method applying cobalt removal device
  • Cobalt removal device for polycrystalline diamond compact and cobalt removal method applying cobalt removal device

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Embodiment 1

[0058] The embodiment of the present application discloses a decobalt device for a polycrystalline diamond composite sheet. refer to figure 1 , the polycrystalline diamond composite sheet decobalt device includes a solution tank 1 containing a decobalt liquid and a decobalt mold 2. The solution tank 1 is provided with a heating device 3 and a vibration device 4. The heating device 3 can be an electric heating rod, a heat exchange The oscillating device 4 can be an ultrasonic vibrating rod, a stirring rod, etc., but the part extending into the decobalt liquid of the above-mentioned equipment needs to be provided with a corrosion-resistant layer on the outside, such as a PTFE coating or a sheath.

[0059] The solution tank 1 is provided with a deck 5, and the decobalt mold 2 is installed on the deck 5 and the polycrystalline layer of the polycrystalline diamond composite sheet in the decobalt mold 2 is immersed in the decobalt solution of the solution tank 1. A wave suppression...

Embodiment 2

[0086] The embodiment of the present application discloses a decobalt device for a polycrystalline diamond composite sheet. refer to Figure 4 , the difference from Example 1 is that: in order to further reduce the excessive surging phenomenon of the decobalt solution at the through hole 61, the wave suppression cylinder 7 is fixed on the lower end face of the wave suppression plate 6 on the peripheral side of the through hole 61, and the wave suppression cylinder is 7 The inner diameter is larger than the diameter of the through hole 61 . The wave suppression cylinder 7 can be hollowed out as a whole, or only the upper part can be hollowed out, which can not only weaken the excessive flow surging to a certain extent, but also retain the additive effect of the shock effect on reducing the decobalt time as much as possible. Of course, the wave suppressor 7 is also made of a corrosion-resistant material, preferably polytetrafluoroethylene.

[0087] Therefore, in specific imple...

Embodiment 3

[0089] The embodiment of the present application discloses a decobalt device for a polycrystalline diamond composite sheet. refer to Figure 5 , and the difference from Embodiment 1 is: the mold sleeve 21 is composed of two sections and is divided into an upper section 211 with one end open and a lower section 212 with both ends open, and the adjacent inner walls of the upper section 211 and the lower section 212 are provided with a common accommodating The ring groove 213 of the corrosion-resistant sealing ring 22, and the upper section 211 and the lower section 212 are threadedly connected; at the same time, the lower section 212 is made of corrosion-resistant PTFE, and the upper section 211 can be made of any hard material, such as steel, aluminum alloy , engineering plastics, etc., and the screwed part of the lower section 212 should be wrapped outside the screwed part of the upper section 211; further, the outer wall of the lower section 212 should also be provided with s...

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Abstract

The invention relates to the field of diamond compact processing, and particularly discloses a polycrystalline diamond compact cobalt removal device and a cobalt removal method applying the device.The device comprises a solution tank and a cobalt removal mold, heating equipment and oscillation equipment are arranged in the solution tank, a clamping base is erected on the solution tank, and the cobalt removal mold is arranged on the clamping base. The cobalt removal mold is installed on the clamping seat, a polycrystalline layer of a polycrystalline diamond compact in the cobalt removal mold is immersed in cobalt removal liquid in the solution tank, and a wave suppression plate flush with the liquid level in the solution tank is arranged in the solution tank. The wave suppression plate is made of a corrosion-resistant material, and a through hole for a polycrystalline layer of the polycrystalline diamond compact to penetrate through is formed in the wave suppression plate in a penetrating manner. The method has the effects of being short in cobalt removal time, high in cobalt removal efficiency and accurate and controllable in cobalt removal depth.

Description

technical field [0001] The application relates to the field of diamond composite sheet processing, in particular to a polycrystalline diamond composite sheet decobalt device and a decobalt method using the device. Background technique [0002] Polycrystalline diamond composite sheet is widely used in petroleum and geological drilling and metal cutting. It is mainly composed of cemented carbide matrix and diamond powder sintered under high temperature and high pressure, including cemented carbide matrix and polycrystalline diamond layer compounded on the matrix ( Also called polycrystalline layer). In the production process, 5-10% by mass of cobalt powder is usually mixed with the diamond micropowder to promote the formation of polycrystalline diamond from the diamond micropowder. [0003] However, when the drill bit equipped with the polycrystalline diamond compact is in contact with the rock at high speed and cutting, it will generate very high heat due to friction. At hig...

Claims

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Application Information

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IPC IPC(8): B22F3/24
CPCB22F3/24B22F2003/244
Inventor 贺凯
Owner 武汉锐特金刚石有限公司
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