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Testing device and method of bonding strength of thermal spraying coating on metal surface

A thermal spray coating and bonding strength technology, applied in measuring devices, mechanical devices, instruments, etc., can solve problems such as difficult bonding strength measurement, and achieve the effect of eliminating adverse effects, simple test principle and simple operation.

Active Publication Date: 2014-08-27
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and device for testing the bonding strength of thermal sprayed coatings on metal surfaces, which can solve the problem that the bonding strength of high bonding strength (>80MPa) coatings is difficult to measure

Method used

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  • Testing device and method of bonding strength of thermal spraying coating on metal surface
  • Testing device and method of bonding strength of thermal spraying coating on metal surface

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Embodiment Construction

[0023] The testing process of the present invention is:

[0024] (1) Select the base material according to the test purpose to process and manufacture the base conical pin 7, insert the base conical pin 7 into the conical hole of the support block 5, and press the base conical pin 7 and the support block 5 with the pressing piece 6 and the bolt after connection;

[0025] (2) Place the above-mentioned connecting device on a lathe or a grinding machine for machining, so that the end faces of the base conical pin 7 and the support block 5 are on the same plane;

[0026] (3) After sandblasting the end face of the machined device, utilize thermal spraying equipment to prepare thermal spray coating 4 on the end faces of conical column pin 7 and support block 5. holes for protection;

[0027] (4) The pressure piece 6 of the test sample after the coating is prepared is unloaded, the position of the joint surface between the conical column pin 7 of the substrate and the coating 4 rem...

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Abstract

The invention relates to a testing device of bonding strength of a thermal spraying coating on a metal surface for testing the bonding strength of a coating with high bonding strength (larger than 80MPa). The testing device consists of a centering component and a testing specimen; the centering component comprises an upper part and a lower part, and respectively consists of an upper pull rod, an upper centering sleeve, a lower pull rod and a lower centering sleeve; the matched surfaces of the upper and lower pull rods with the upper and lower centering sleeves are spherical surfaces, and 360-degree centering fine tuning is realized under the effect of drawing force; the testing specimen consists of a loading block, a coating, a support block, a pressing sheet and a base body conical column pin; the center of the support block has a through conical hole with the taper of 15 degrees-30degrees equal to the taper of the base body conical column pin; the base body conical column pin passes through the conical hole of the support block, and the support block at the other side and the end surface of the base body conical column pin are in the same plane; the loading block and the pressing sheet have two round through holes which can be respectively connected with two threaded through holes of the support block by bolts. The testing device and the testing method have the characteristics of simple testing principle, simplicity and flexibility in operation, high result accuracy and the like.

Description

technical field [0001] The invention belongs to the technical field of coating bonding strength testing, and relates to a bonding strength testing device for thermal sprayed coatings on metal surfaces. Background technique [0002] Thermal spraying is an important surface engineering technology and an important means to improve the surface properties of materials. Functional coatings such as anti-corrosion, wear-resistant, heat-insulating, conductive, insulating, and sealing can be prepared through thermal spraying technology, which has been widely used in aerospace , automotive industry, information technology, optical engineering and other manufacturing and remanufacturing industries. In order to make the coating have a better strengthening and repairing effect, it is required that the coating and the substrate have a sufficiently high bonding strength to prevent the coating from falling off in extreme service environments. At present, technologies such as detonation spra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/04
Inventor 朱胜韩国峰王晓明姚巨坤刘玉项王之千周超极
Owner ACADEMY OF ARMORED FORCES ENG PLA
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