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Method for detecting defects in inclined plane of hard alloy cubic anvil

A technology of cemented carbide and detection method, which is applied in the direction of using sonic/ultrasonic/infrasonic waves to analyze solids, and achieves the effect of simple detection method and high detection accuracy

Active Publication Date: 2021-11-30
ZHUZHOU HARD ALLOY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no ultrasonic testing method or related report on the 40-42° and 44-46° surfaces of the cemented carbide six-sided top, so a kind of defect on the 40-42° and 44-46° surface of the cemented carbide six-sided top is developed. The detection method is of great significance

Method used

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  • Method for detecting defects in inclined plane of hard alloy cubic anvil
  • Method for detecting defects in inclined plane of hard alloy cubic anvil
  • Method for detecting defects in inclined plane of hard alloy cubic anvil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The invention provides a method for detecting a cemented carbide six-sided anvil, comprising the following steps:

[0031] Taking the top of the cemented carbide anvil as the testing surface, select 12 cemented carbide anvils as test samples, numbered 1-12.

[0032] 1. Preparation of comparison test block and calibration of instrument

[0033] Make a comparison test block, the specific structure is as follows figure 1 As shown, the phased array ultrasonic detector adopts omniscan MX2, and the phased array probe adopts a 16-chip probe with a frequency of 10MHz, a pitch of 0.3-1.0mm, a chip width of 6-10mm, and a wedge with an angle of 40-70°. The ultrasonic energy can be easily transmitted to the inside of the test block and can meet the requirements of scanning the edge, 40-42° surface and 44-46° surface of the entire anvil.

[0034] The punching diagram of the comparison test block is as follows figure 2 As shown, use a 15mm long iron wire with a diameter of 1mm in...

Embodiment 2

[0043]The invention provides a method for detecting defects on the deformed surface of a cemented carbide anvil. Each edge of an anvil is detected, and 12 anvils are selected as detection samples, numbered 13-24. The same sensitivity and sensitivity as in Example 1 are adopted. The scanning method is used for detection, and the probe is placed at the bottom of the anvil to detect the edge. The detection results are shown in Table 2:

[0044] Table 2 Test results

[0045]

[0046] Figure 8 A defect was found for the No. 17 top hammer sample, which was found to be a crack by wire cutting.

Embodiment 3

[0048] The invention provides a method for detecting defects in the inclined plane of a cemented carbide top hammer, which detects defects on the 40-42° surface of a cemented carbide top hammer, and selects 12 top hammers as test samples, numbered 25-36, adopted and implemented For the same sensitivity and scanning method as Example 2, put the probe at the bottom for detection, and the detection results are shown in Table 3:

[0049] Table 3 Test results

[0050]

[0051] Figure 9 It is the defect waveform of No. 31 anvil, which was confirmed to be a dirty hole by wire cutting.

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Abstract

The invention discloses a method for detecting defects in an inclined plane of a hard alloy cubic anvil. The method comprises the following steps of preparing a reference test block made of the same material according to the hard alloy composition of the hard alloy cubic anvil to be detected, and forming a detection hole and an arc line on the inclined plane of the reference test block; arranging a probe of a phased array ultrasonic detector at the top or the bottom of the reference test block for testing, acquiring the transverse wave sound velocity of the anvil material, correcting the detector, and setting detection sensitivity; setting test parameters of the phased array ultrasonic detector; and then carrying out flaw detection on the bottom of the hard alloy cubic anvil to be detected, and judging the specific position of a defect. According to the method, a detection method, selection of a probe and an optimal configuration wedge block of the probe are designed according to the characteristics of the inclined planes and the edges of the hard alloy cubic anvil, and the sound velocity of the material of the anvil, the detection sensitivity and the correction of a detection instrument are completed by designing a test block so that the defect detection of the inclined planes and the edges of the hard alloy cubic anvil is realized.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic flaw detection, and relates to a method for detecting defects in the slope of a hard alloy six-sided anvil. Background technique [0002] Due to its high hardness and corrosion resistance, artificial diamond is widely used in cutting, grinding, drilling and other purposes. As its use becomes wider and its demand grows, the methods driving its synthesis continue to improve. It is mainly produced by the static ultra-high pressure (5-10GPa) and high temperature (1100-3000°C) technology, through the reaction of carbonaceous materials such as graphite and certain metal materials. [0003] Carbide six-sided anvil is used in artificial diamond cavity due to its high hardness, high strength, heat resistance and corrosion resistance. Synthetic diamond synthesis cavity is composed of six anvils to form a closed space, using this cavity to apply high pressure and high temperature to react carbonaceous m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/04
Inventor 卢少武余琳
Owner ZHUZHOU HARD ALLOY GRP CO LTD