Method for detecting positions of cracks in diamond compacts

A technology for diamond composite sheets and internal cracks, which is applied in the direction of testing composite materials, measuring devices, and optical testing for flaws/defects. Simple operation effect

Active Publication Date: 2018-05-18
ZHUHAI JUXIN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These test methods are not only cumbersome, but also the diamond compacts after testing cannot be used continuously, that is to say, the diamond compacts tested by these existing methods have been scrapped

Method used

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  • Method for detecting positions of cracks in diamond compacts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for detecting the position of cracks inside a diamond composite sheet. The diamond composite sheet includes polycrystalline diamond and a diamond composite sheet substrate, wherein the polycrystalline diamond is sintered on the diamond composite sheet substrate through high temperature and high pressure sintering.

[0037] The matrix of the diamond compact is a tungsten carbide matrix, the matrix of the diamond compact contains cobalt with a mass fraction of 8% to 10%, and the diamond compact is completely soaked in copper sulfate with a concentration of 10g / L In the solution, take it out after soaking for 2 minutes, rinse it slightly with water, you can see that the diamond composite sheet is divided into copper-plated and non-copper-plated areas, and the dividing line between the two areas is the matrix of the diamond composite sheet during welding. location of internal cracks.

[0038] In the present invention, the copper plated area is shown as red, light r...

Embodiment 2

[0041] A method for detecting the internal crack position of a diamond composite sheet, the conditions are the same as in Example 1, except that the diamond composite sheet is soaked in a copper nitrate solution with a concentration of 50g / L for 50 seconds, and the diamond composite sheet The matrix contains cobalt with a mass fraction of 5% to 8%. As a result, it is found that the position of the internal crack detected by the method of the present invention is consistent with the position of the internal crack detected by the heat resistance test (fluorescence defect detection method), thus it can be seen that the detection method of the present invention is accurate.

Embodiment 3

[0043] A method for detecting the internal crack position of a diamond composite sheet, the conditions are the same as in Example 1, except that the diamond composite sheet is soaked in a copper chloride solution with a concentration of 1g / L for 30 minutes, and the diamond composite sheet The sheet substrate contains cobalt with a mass fraction of 10% to 12%. As a result, it is found that the position of the internal crack detected by the method of the present invention is consistent with the position of the internal crack detected by the heat resistance test (fluorescence defect detection method), thus it can be seen that the detection method of the present invention is accurate.

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Abstract

The invention discloses a method for detecting positions of cracks in diamond compacts. Each diamond compact is prepared from polycrystalline diamond and a diamond compact matrix, wherein the diamondcompact matrix contains cobalt; the diamond compact is completely soaked into a copper salt solution with a concentration as 0.001g / L to 120g / L, the diamond compact is taken out after being soaked for30 seconds to 5 hours, and the diamond compact is simply and slightly washed by water. According to the method disclosed by the invention, not only whether cracks exist in the diamond compacts can bedetected, but also the positions of the cracks in the diamond compacts be accurately detected. The method disclosed by the invention has no damage to the diamond compacts, and the detected diamond compacts can be utilized continuously like before detection; furthermore, the method has the advantages of simpleness in operation, convenience, quickness, high accuracy and good repeatability.

Description

technical field [0001] The invention belongs to the technical field of quality diagnosis of diamond composite sheets, and in particular relates to a method for detecting internal crack positions of diamond composite sheets. Background technique [0002] Polycrystalline Diamond Compact (PDC) is a composite material consisting of a polycrystalline diamond layer covered on the surface of a cemented carbide substrate. It is synthesized from diamond micropowder and cemented carbide substrate under ultra-high pressure and high temperature conditions. wear resistance, toughness and weldability. Polycrystalline diamond composite sheet combines the extremely high wear resistance of polycrystalline diamond and the high impact resistance of cemented carbide. The cutting edge of the diamond layer is sharp and self-sharpening, which can always keep the cutting edge sharp, so it is very suitable for the exploration of soft formations to medium-hard formations in petroleum and geological ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G01N21/75
CPCG01N21/75G01N21/8803G01N2021/751G01N2021/8472
Inventor 周勃张辰张琪冯秀鹏苏建安
Owner ZHUHAI JUXIN TECH DEV
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