Detection method of shock resistance of diamond compact

A technology of diamond composite sheet and impact resistance, which is applied in the direction of measuring devices, strength characteristics, instruments, etc., can solve problems such as easy deformation, poor data reliability, and increased contact area, achieve uniform density, solve instability and The effect of large error and high bending strength

Active Publication Date: 2015-10-21
河南亚龙金刚石制品股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have their own advantages and disadvantages: although the turning granite of the former is close to the actual use environment of PDC, the reliability of the measured data is poor, the process is complicated, and there are certain accidental factors in the cutting, such as the difference of natural granite in different origins. ...

Method used

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  • Detection method of shock resistance of diamond compact
  • Detection method of shock resistance of diamond compact
  • Detection method of shock resistance of diamond compact

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Ingredients: Weigh raw materials according to the following weight percentages: Co: 6%, WC: 89%, W: 3.5%, VC: 1%, CeO2: 0.5%;

[0029] (2) Sintering: Put the material obtained in step (1) into a mold for spark plasma sintering at a temperature of 1100° C., a pressure of 30 MPa, and a holding time of 30 minutes.

[0030] (3) Installation: install the cemented carbide prepared in step (2) on the workbench, and install the chamfered diamond composite sheet on the cantilever beam at the same time, and set the single impact energy value to 0.7J.

[0031] (4) Work: Turn on the power switch, the cantilever beam starts to move up and down, the lifting and falling height of the knife handle is 4cm, use the principle of gravity acceleration to detect the impact resistance of the diamond composite sheet, until visible cracks appear on the surface of the diamond composite sheet or break. Stop operate.

[0032] (5) Calculation: According to the product value of the number of i...

Embodiment 2

[0039] (1) Ingredients: Weigh raw materials according to the following weight percentages: Co: 15%, WC: 80%, W: 4%, VC: 0.5%, CeO2: 0.5%;

[0040] (2) Sintering: Put the material obtained in step (1) into a mold for spark plasma sintering at a temperature of 1300° C., a pressure of 10 MPa, and a holding time of 10 minutes.

[0041] (3) Installation: install the cemented carbide prepared in step (2) on the worktable, and install the chamfered diamond composite sheet on the cantilever beam at the same time, and set the single impact energy value to 1 J.

[0042] (4) Work: Turn on the power switch, the cantilever beam starts to move up and down, the lifting and falling height of the knife handle is 6cm, use the principle of gravity acceleration to detect the impact resistance of the diamond composite sheet, until visible cracks or breakage appear on the surface of the diamond composite sheet and stop operate.

[0043] (5) Calculation: According to the product value of the numb...

Embodiment 3

[0050](1) Ingredients: Weigh raw materials according to the following weight percentages: Co: 10%, WC: 85%, W: 3.5%, VC: 1%, CeO2: 0.5%;

[0051] (2) Sintering: Put the material obtained in step (1) into a mold for spark plasma sintering at a temperature of 1200° C., a pressure of 20 MPa, and a holding time of 20 minutes.

[0052] (3) Installation: install the cemented carbide prepared in step (2) on the workbench, and install the chamfered diamond composite sheet on the cantilever beam at the same time, and set the single impact energy value to 1.6J.

[0053] (4) Work: Turn on the power switch, the cantilever beam starts to move up and down, the lifting and falling height of the knife handle is 9cm, use the principle of gravity acceleration to detect the impact resistance of the diamond composite sheet, until visible cracks or breakage appear on the surface of the diamond composite sheet. operate.

[0054] (5) Calculation: According to the product value of the number of imp...

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Abstract

The invention discloses a detection method of shock resistance of a diamond compact. The method comprises the following steps: fixing a chamfered diamond compact on a knife handle; fixing a hard alloy on a working table; measuring the shock resistance of the diamond compact by combining the product value of a single shock energy value generated through the lifting and dropping of the knife handle and the shock frequency with the percentage of the correction factors of chamfer dimension and the damaged area, wherein the lifting and dropping height of the knife handle is 4-9 cm; the gravitational potential energy is converted into the single shock energy used in detection; the single shock energy value is 0.7-1.6 J; the single shock energy value is calculated through the law of conservation of mechanical energy. The method is small in test error and simple to operate, and can accurately reflect the shock resistance of the diamond compact.

Description

technical field [0001] The invention relates to a method for detecting impact resistance, in particular to a method for detecting impact resistance of a diamond composite sheet. Background technique [0002] Impact resistance refers to the ability of the sample to resist the impact load, which is often used to measure the toughness of the material under impact or the resistance to fracture. [0003] Diamond compact (referred to as PDC) is a superhard composite material composed of polycrystalline diamond layer and cemented carbide matrix. It not only has the hardness and wear resistance of diamond, but also has the impact resistance and weldability of cemented carbide. It has been widely used as geological, oil and gas well drilling tools and machining tools, especially as drill teeth for geological and oil and gas well drill bits, which have initially replaced traditional carbide drill teeth. When the diamond composite sheet is used as a drill tooth, it will be strongly im...

Claims

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Application Information

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IPC IPC(8): G01N3/303
Inventor 陈强花波波邓福铭轩敏杰王恒
Owner 河南亚龙金刚石制品股份有限公司
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