CN116183419A - Method for testing friction and wear performance of cylindrical side plating layer - Google Patents

Method for testing friction and wear performance of cylindrical side plating layer Download PDF

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CN116183419A
CN116183419A CN202211646378.XA CN202211646378A CN116183419A CN 116183419 A CN116183419 A CN 116183419A CN 202211646378 A CN202211646378 A CN 202211646378A CN 116183419 A CN116183419 A CN 116183419A
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grinding
sample
testing
wear
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翟亚楠
付志强
卢硕
李岩
王婷
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China United Test & Certification Co ltd
China University of Geosciences Beijing
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China United Test & Certification Co ltd
China University of Geosciences Beijing
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/56—Investigating resistance to wear or abrasion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
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    • G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means

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Abstract

The invention discloses a method for testing frictional wear performance of a cylindrical side coating, and belongs to the technical field of frictional wear performance testing of materials. The test method comprises the steps of preparing a to-be-tested sample of a plating layer on the side surface of a cylinder, and adopting a ball as a counter grinding pair. The testing method mainly comprises two parts: firstly, enabling a counter grinding pair to contact with the side surface of a cylinder of a sample to be tested, and performing a reciprocating friction and wear test to obtain a friction coefficient; then, the cross-sectional area of the abrasion mark and the width of the abrasion mark were measured by a white light interferometer, and the abrasion volume of the cylindrical side plating was calculated by a formula. The testing method provided by the invention has the advantages of strong operability and easiness in implementation, solves the problem that the frictional wear performance of the cylindrical side plating layer is difficult to test, and can effectively test the frictional wear performance of the cylindrical side plating layer.

Description

Method for testing friction and wear performance of cylindrical side plating layer
Technical Field
The invention belongs to the technical field of friction and wear performance test of materials, and particularly relates to a method for testing friction and wear performance of a cylindrical side plating layer.
Background
The frictional wear performance of a material is one of the indicators for evaluating its service life. At present, the existing friction and wear performance testing methods, such as ball-disc rotation (reciprocating) friction and wear, pin-disc rotation (reciprocating) friction and wear, ring-block friction and wear, all require that at least one of the contact surfaces of the friction fit pair is a plane. However, in practical engineering applications, there are many cylindrical workpieces, in which the frictional wear performance is improved by preparing a coating on the surface, so that the service life is prolonged, and there is still a difficulty in how to test the frictional wear performance of the surface coating and evaluate the service life.
Disclosure of Invention
The invention aims to provide a method for testing friction and wear properties of a cylindrical side plating layer, which is characterized by comprising the following steps:
step 1, installing a sample to be tested, enabling the position to be tested of the side surface of a cylinder to be horizontally upwards, enabling the height of the cylinder to be parallel to the reciprocating motion direction, and ensuring that the sample cannot shake in the testing process;
step 2, installing a grinding pair right above the sample to be tested, and installing the grinding pair in a clamp to ensure that the grinding pair cannot roll in the clamp in the test process; then, the relative positions of the sample to be tested and the counter grinding pair are adjusted, so that the sample to be tested and the counter grinding pair are ensured to be in good contact;
step 3, setting test parameters including load F z The reciprocating stroke L, the reciprocating frequency f, the test temperature T, the lubrication condition and the test time T;
step 4, performing friction and wear test, and after the counter grinding pair contacts the sample to be tested, loading F z Vertically loaded on the counter grinding pairThe test parameters set in the step 3 do reciprocating motion on the horizontal direction right below the opposite grinding pair of the test sample, and the test is stopped after the time t; after the test is finished, calculating the average value of the friction coefficient mu recorded by the friction and wear testing machine; the friction coefficient μ=friction force F x Load F z ；
Step 5, calculating the abrasion volume V of the cylindrical side plating layer, and selecting at least 3 in the direction perpendicular to the length direction of the abrasion mark ～ 5 positions, as shown in FIG. 2, the cross-sectional area A of the grinding mark was measured using a white light interferometer i And width W of wear scar i The wear volume V is calculated by the following formula,
V＝V 1 +V 2
V 1 ＝A·L
Figure BDA0004009757490000021
Figure BDA0004009757490000022
Figure BDA0004009757490000023
/>
wherein V is the abrasion volume, A is the average value of the cross-sectional areas of abrasion marks; l is the length of the grinding mark; w is the average value of the width of the grinding mark; r is the radius of the cylinder with the coating. n is the total number of times the white light interferometer measures the cross-sectional area of the grinding mark or the width of the grinding mark, and i is the order of measurement.
The thickness of the plating layer on the surface of the sample to be tested is uniform.
The material of the pair grinding pair is a metal or ceramic material with high hardness.
The beneficial effects of the invention are as follows: the method provided by the invention has the advantages of strong operability and easiness in realization, can effectively measure the frictional wear performance of the cylindrical side plating layer, and solves the problem that the frictional wear performance of the cylindrical side plating layer is difficult to measure; the friction and wear performance of the cylindrical side plating layer can be effectively tested.
Drawings
FIG. 1 is a schematic diagram showing the frictional wear performance test of a cylindrical side coating.
FIG. 2 is a schematic view of the abrasion mark generated by the side coating of the cylinder after the frictional abrasion test.
Wherein 101 is a sample to be detected, and 102 is a pair grinding pair; 201 is the cross-sectional area of the grinding mark, 202 is the width of the grinding mark, 203 is V 1 204 is V 2 。
Detailed Description
The invention provides a method for testing friction and wear properties of a cylindrical side coating, which is further described by referring to the accompanying drawings:
a schematic diagram of the reciprocating frictional wear test of the cylindrical side plating is shown in fig. 1. The test of the friction and wear performance of the cylindrical side plating layer comprises the following steps:
step 1, a sample 1 to be tested is arranged on a sample table of a reciprocating frictional wear testing machine, so that the position to be tested of the side surface of a cylinder is horizontally upwards, and the height of the cylinder is parallel to the reciprocating motion direction, thereby ensuring that the sample 1 to be tested cannot shake in the testing process; and the plating thickness of the surface of the sample 1 to be measured is uniform.
Step 2, installing the counter grinding pair 2 in a clamp, and ensuring that the counter grinding pair cannot roll in the clamp in the test process; the relative positions of the to-be-measured sample 1 and the counter grinding pair 2 are adjusted, so that the counter grinding pair 2 is positioned right above the to-be-measured sample 1, and good contact between the to-be-measured sample and the counter grinding pair is ensured;
step 3, setting test parameters including load F z The reciprocating stroke L, the reciprocating frequency f, the test temperature T, the lubrication condition and the test time T; after the test is finished, calculating the average value of the friction coefficient mu;
step 4, performing friction and wear test, and after the counter grinding pair contacts the sample to be tested, loading F z The test parameters set in the step 3 are reciprocated in the horizontal direction right below the counter grinding pair, and the test is stopped after the time t; after the test is finished, a frictional wear testing machine is calculatedThe average value of the friction coefficient mu recorded; the friction coefficient μ=friction force F x Load F z ；
Step 5, calculating the abrasion volume V of the cylindrical side plating layer, and selecting at least 3 in the direction perpendicular to the length direction of the abrasion mark ～ 5 positions, as shown in fig. 2, wherein 101 is a sample to be tested, and 102 is a pair of grinding pairs; 201 is the cross-sectional area of the grinding mark, 202 is the width of the grinding mark, 203 is V 1 204 is V 2 。
Cross-sectional area A of grinding mark measured by white light interferometer i And width W of wear scar i The wear volume V is calculated by the following formula.
V＝V 1 +V 2
V 1 ＝A·L
Figure BDA0004009757490000041
Figure BDA0004009757490000042
Figure BDA0004009757490000043
Wherein V is the abrasion volume, A is the average value of the cross-sectional areas of abrasion marks; l is the length of the grinding mark; w is the average value of the width of the grinding mark; r is the radius of the cylinder with the coating. n is the total number of times the white light interferometer measures the cross-sectional area of the grinding mark or the width of the grinding mark, and i is the order of measurement.
Example 1
And (3) testing a sample: the diameter of the alloy is 11.1mm, and the coating is an anodic oxide film.
Pairing grinding pair: si with diameter of 6mm 3 N 4 Ceramic balls.
Test parameters: load F Z 5N, a reciprocating stroke L of 2.5mm, a reciprocating frequency f of 5Hz, a test temperature T of room temperature, a lubrication condition of dry friction, and a test time T of 20min。
Test results: the average value of the friction coefficient μ was 0.805, the cross-sectional area of the wear scar and the width of the wear scar were measured by a white light interferometer, the measurement results are shown in table 1, and the calculation results of the wear volume are shown in table 2.
TABLE 1 measurement results of cross-sectional area and width of grinding marks in example 1
Measuring position 1 2 3
Wear scar cross-sectional area A/μm 2 10474.24 12259.23 9963.43
Wear scar width W/μm 827.00 833.99 827.00
Table 2 calculation of wear volume in example 1
A/μm 2 W/μm V 1 /mm 3 V 2 /mm 3 V/mm 3
10898.96 829.33 2.72×10 -2 2.16×10 -2 4.88×10 -2
Example 2
And (3) testing a sample: the diameter of the alloy is 14mm, and the coating is an anodic oxide film.
Pairing grinding pair: GCr15 bearing steel ball with diameter of 6 mm.
Test parameters: load F Z The reciprocating stroke L is 2.5mm, the reciprocating frequency f is 5Hz, the test temperature T is room temperature, the lubrication condition is dry friction, and the test time T is 20min.
Test results: the average value of the friction coefficient mu was 0.758, the cross section joint of the wear scar and the width of the wear scar were measured by a white light interferometer, the measurement results are shown in Table 3, and the calculation results of the wear volume are shown in Table 4.
TABLE 3 measurement results of cross-sectional area and width of grinding marks in example 2
Measuring position 1 2 3
Wear scar cross-sectional area A/μm 2 15251.36 13702.84 12260.59
Wear scar width W/μm 874.44 864.74 861.24
Table 4 calculation of wear volume in example 2
A/μm 2 W/μm V 1 /mm 3 V 2 /mm 3 V/mm 3
13738.26 866.80 3.43×10 -2 1.94×10 -2 5.37×10 -2
Example 3
And (3) testing a sample: the diameter of the titanium alloy is 7.45mm, and the coating is an anodic oxide film.
Pairing grinding pair: si with diameter of 6mm 3 N 4 Ceramic balls.
Test parameters: load F Z The reciprocating stroke L is 2.5mm, the reciprocating frequency f is 5Hz, the test temperature T is room temperature, the lubrication condition is dry friction, and the test time T is 20min.
Test results: the average value of the friction coefficient μ was 0.947, the cross section joint of the wear scar and the width of the wear scar were measured by a white light interferometer, the measurement results are shown in table 5, and the calculation results of the wear volume are shown in table 6.
TABLE 5 measurement results of cross-sectional area and width of grinding marks in example 3
Measuring position 1 2 3
Wear scar cross-sectional area A/μm 2 6443.27 8070.55 7304.02
Wear scar width W/μm 857.34 857.34 826.94
Table 6 calculation of wear volume in example 3
A/μm 2 W/μm V 1 /mm 3 V 2 /mm 3 V/mm 3
7272.61 847.21 1.82×10 -2 3.41×10 -2 5.23×10 -2

Claims (3)

1. The method for testing the friction and wear performance of the cylindrical side plating layer is characterized by comprising the following steps of:
step 1, installing a sample to be tested, enabling a region to be tested on the side surface of a cylinder to face upwards horizontally, and ensuring that the height of the cylinder is parallel to the reciprocating motion direction, so as to ensure that the sample cannot shake in the testing process;
step 2, installing the counter grinding pair in a clamp, ensuring that the counter grinding pair does not roll in the clamp in the test process, and installing the installed counter grinding pair above a sample to be tested; then, the relative positions of the sample to be measured and the counter grinding pair are adjusted to ensure that the counter grinding pair is positioned at a position of 1mm right above the area to be measured;
step 3, setting test parameters including load F z The reciprocating stroke L, the reciprocating frequency f, the test temperature T, the lubrication condition and the test time T;
step 4, performing friction and wear test, and after the counter grinding pair contacts the sample to be tested, loading F z The test parameters set in the step 3 are reciprocated in the horizontal direction right below the counter grinding pair, and the test is stopped after the time t; after the test is finished, calculating the average value of the friction coefficient mu recorded by the friction and wear testing machine; the friction coefficient μ=friction force F x Load F z ；
Step 5, calculating the abrasion volume V of the cylindrical side coating, selecting at least 3-5 positions in the direction perpendicular to the length direction of the abrasion mark, and measuring the cross section area A of the abrasion mark by using a white light interferometer i And width W of wear scar i The wear volume V is calculated by the following formula,
V＝V 1 +V 2
V 1 ＝A·L
Figure FDA0004009757480000011
Figure FDA0004009757480000012
Figure FDA0004009757480000013
wherein V is the abrasion volume, A is the average value of the cross-sectional areas of abrasion marks; l is the length of the grinding mark; w is the average value of the width of the grinding mark; r is the radius of the cylinder with the coating; n is the total number of times the white light interferometer measures the cross-sectional area of the grinding mark or the width of the grinding mark, and i is the order of measurement.
2. The method for testing the frictional wear performance of the cylindrical side coating according to claim 1, wherein the surface coating thickness of the test sample is uniform.
3. The method for testing the frictional wear performance of the side coating of the cylinder according to claim 1, wherein the material of the pair of grinding pairs is a metal or ceramic material with high hardness.
CN202211646378.XA 2022-12-21 2022-12-21 Method for testing friction and wear performance of cylindrical side plating layer Pending CN116183419A (en)

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