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Scratch hardness test method

A test method and technology of scratch hardness, applied in the direction of testing material hardness, etc., can solve the problems of insufficient accuracy of scratch hardness measurement, large measurement error, and material damage around the test piece, so as to achieve good popularity and test error Small and easy to operate

Inactive Publication Date: 2015-09-09
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many types of indenters used for scratch hardness testing, and the most commonly used one is the conical indenter. However, when the conical indenter is actually used, it will often cause damage to the surrounding materials of the test piece, resulting in large measurement errors. , so that the accuracy of the scratch hardness measurement is not good enough

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 Shown, a kind of scratch hardness test method, this test method specifically comprises the following steps:

[0038] (1) Clean the sample 1 to be tested and dry it;

[0039] (2) Fix the sample 1 to be tested on the base of the testing machine, and fix the contact pin 3 provided with the indenter 2 on the fixture of the testing machine, adjust the direction of the stylus so that the indenter 2 is perpendicular to the test machine Surface of sample 1;

[0040] (3) Set the pressure P and the scratching speed of the indenter 2 on the surface of the sample 1 to be tested by the testing machine;

[0041] (4) Turn on the power and carry out the scratch test;

[0042] (5) After the scratch test is finished, measure the scratch width at 3-5 places on the surface of the sample to be tested 1, and get the average value W of the scratch width;

[0043] (6) Calculate the scratch hardness value according to the average value of the scratch width product and the p...

Embodiment 2

[0052] The scratch hardness test method of the present embodiment specifically comprises the following steps:

[0053] (1) Clean the sample 1 to be tested and dry it;

[0054] (2) Fix the sample 1 to be tested on the base of the testing machine, and fix the contact pin 3 provided with the indenter 2 on the fixture of the testing machine, adjust the direction of the stylus so that the indenter 2 is perpendicular to the test machine Surface of sample 1;

[0055] (3) Set the pressure P and the scratching speed of the indenter 2 on the surface of the sample 1 to be tested by the testing machine;

[0056] (4) Turn on the power and carry out the scratch test;

[0057] (5) After the scratch test is finished, measure the scratch width at 3-5 places on the surface of the sample to be tested 1, and get the average value W of the scratch width;

[0058] (6) Calculate the scratch hardness value according to the average value of the scratch width product and the pressure P, the formula ...

Embodiment 3

[0067] The scratch hardness test method of the present embodiment specifically comprises the following steps:

[0068] (1) Clean the sample 1 to be tested and dry it;

[0069](2) Fix the sample 1 to be tested on the base of the testing machine, and fix the contact pin 3 provided with the indenter 2 on the fixture of the testing machine, adjust the direction of the stylus so that the indenter 2 is perpendicular to the test machine Surface of sample 1;

[0070] (3) Set the pressure P and the scratching speed of the indenter 2 on the surface of the sample 1 to be tested by the testing machine;

[0071] (4) Turn on the power and carry out the scratch test;

[0072] (5) After the scratch test is finished, measure the scratch width at 3-5 places on the surface of the sample to be tested 1, and get the average value W of the scratch width;

[0073] (6) Calculate the scratch hardness value according to the average value of the scratch width product and the pressure P, the formula i...

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Abstract

The invention relates to a scratch hardness test method. The test method comprises specific steps as follows: (1), a to-be-tested sample is cleaned and dried; (2), the to-be-tested sample is fixed on a base of a tester, a contact probe provided with a pressure head is fixed on a fixture of the tester, the direction of the contact probe is adjusted, and accordingly, the pressure head is perpendicular to the surface of the to-be-tested sample; (3), pressure P and a scratch speed of the pressure head on the surface of the to-be-tested sample are set through the tester; (4), a power supply is switched on, and a scratch test is performed; (5), after the scratch test ends, widths of 3-5 scratches on the surface of the to-be-tested sample are measured, and the average value W of the widths of the scratches is taken; (6), a scratch hardness value is calculated according to the average value W of the scratch widths and the pressure P. Compared with the prior art, the test method is simple and convenient to operate; the spherical pressure head is adopted for the test, difficulty for scratch measurement and errors of calculation of scratch hardness values can be reduced, the test accuracy is high, and the scratch hardness test method is economical and practical and has good universality.

Description

technical field [0001] The invention belongs to the technical field of material detection and relates to a scratch hardness test method. Background technique [0002] The scratch hardness test is to draw a trace on the surface of the material, and calculate the hardness of the material by measuring the width of the scratch. Scratch hardness is mainly applied to luxury materials and coating materials. The MMW-1A multifunctional vertical friction and wear testing machine can measure the friction properties of lubricants, metals, coatings, plastics, ceramics and other materials under a certain pressure, and it has a stepless speed regulation system. [0003] In scratch hardness testing, the most important step is to select a suitable indenter. At present, there are many types of indenters used for scratch hardness testing, and the most commonly used one is the conical indenter. However, when the conical indenter is actually used, it will often cause damage to the surrounding ...

Claims

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Application Information

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IPC IPC(8): G01N3/46
Inventor 朱星宇金晓怡周正珠田培培周强周晓磊
Owner SHANGHAI UNIV OF ENG SCI
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