CN111678824B - Metal sheet microhardness detection method - Google Patents
Metal sheet microhardness detection method Download PDFInfo
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- CN111678824B CN111678824B CN202010663961.6A CN202010663961A CN111678824B CN 111678824 B CN111678824 B CN 111678824B CN 202010663961 A CN202010663961 A CN 202010663961A CN 111678824 B CN111678824 B CN 111678824B
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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
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
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Abstract
The application belongs to the technical field of metal sheet hardness detection, and particularly relates to a metal sheet microhardness detection method, which comprises the following steps: winding a metal sheet to a predetermined thickness; preparing a sample by using a sample inlaying machine for the metal sheet wound to the preset thickness; grinding and polishing the sample; and (5) carrying out microhardness detection on the polished and polished sample. According to the method for detecting the microhardness of the metal sheet, the thickness of the metal sheet is increased in a winding mode, so that the thickness of the metal sheet meets the requirement of microhardness detection on the depth of an indentation and the requirement of microhardness detection on the distance of an edge, the pressure bearing capacity of the metal sheet can be enhanced by increasing the thickness of the metal sheet in the winding mode, serious deformation is avoided during microhardness detection, and a relatively accurate result can be obtained.
Description
Technical Field
The application belongs to the technical field of metal sheet hardness detection, and particularly relates to a metal sheet microhardness detection method.
Background
The hardness detection of the metal material is an important means for measuring the hardness degree of the metal material, and plays an important guiding role in the items of heat treatment process, mechanical property and the like of the metal material. The microhardness detection is directly carried out on the surface or the side surface of the material, the hardness value of the material can be directly obtained, and when the microhardness detection is carried out on a metal sheet, particularly the microhardness detection is carried out on the microhardness of a metal sheet strip and a metal foil, an accurate detection result is difficult to obtain due to the following reasons:
1) The metal sheet is small in thickness, and the microhardness detection is performed on the surface of the metal sheet, so that the metal sheet is easy to penetrate, and the requirement on the indentation depth of the microhardness detection is difficult to meet; microhardness detection is carried out on the side surface of the glass tube, so that the requirement of microhardness detection on the edge distance is difficult to meet;
2) When the metal sheet bears pressure, the metal sheet is easy to deform seriously, and the actual hardness of the metal sheet is difficult to obtain by directly carrying out microhardness detection on the metal sheet.
The present application has been made in view of the above-mentioned technical drawbacks.
Disclosure of Invention
In order to solve the technical problem, the application provides a method for detecting microhardness of a metal sheet.
The application provides a method for detecting microhardness of a metal sheet, which comprises the following steps:
winding a metal sheet to a predetermined thickness;
preparing a sample by using a sample inlaying machine for the metal sheet wound to the preset thickness;
grinding and polishing the sample;
and (5) carrying out microhardness detection on the polished and polished sample.
Preferably, in the method for detecting microhardness of a metal sheet, the winding of the metal sheet to a predetermined thickness specifically includes:
the metal sheet will be wound on the rod to a predetermined thickness.
Preferably, in the method for measuring micro-hardness of a metal sheet, the bar is made of carbon steel or alloy steel.
Preferably, in the method for detecting microhardness of a metal sheet, the polishing treatment is performed on the sample, and specifically includes:
and sequentially polishing the sample by 180#, 400#, 600# and 800# sandpaper.
Preferably, in the method for detecting microhardness of a metal sheet, the polishing treatment is performed on the sample, and specifically:
the sample was polished with a 2.5 μm polishing agent.
Preferably, in the method for detecting microhardness of a metal sheet, before the step of winding the metal sheet to a predetermined thickness, the method further includes:
and cleaning the surface of the metal sheet.
Preferably, in the method for detecting microhardness of a metal sheet, the cleaning of the surface of the metal sheet specifically includes:
the surface of the metal sheet is washed by absolute ethyl alcohol.
Preferably, in the method for detecting microhardness of a metal foil, before preparing a sample by using a sample setting machine, the method further includes:
the metal sheets wound to a predetermined thickness are bundled.
Preferably, in the method for detecting microhardness of a metal sheet, the metal sheet wound to a predetermined thickness is bundled, and specifically:
the metal sheet wound to a predetermined thickness is bundled with a wire.
Preferably, in the method for detecting microhardness of a metal sheet, the metal wire is a copper wire.
Preferably, in the method for detecting microhardness of a metal sheet, the microhardness detection of the polished and polished sample is specifically:
and (5) carrying out micro Vickers hardness detection on the polished and polished sample.
Drawings
FIG. 1 is a flow chart of a method for measuring microhardness of a metal sheet provided by the present application;
FIG. 2 is a schematic view of the structure provided by the present application for wrapping a metal sheet around a rod to a predetermined thickness and binding the sheet;
FIG. 3 is a partial sectional view taken along line A-A;
wherein, the first and the second end of the pipe are connected with each other,
1-a metal flake; 2-a metal wire; and 3-a bar material.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application.
The present application is described in further detail below with reference to fig. 1 to 3.
The application provides a method for detecting microhardness of a metal sheet, which comprises the following steps:
winding a metal sheet to a predetermined thickness;
preparing a sample by using a sample inlaying machine for the metal sheet wound to the preset thickness;
grinding and polishing the sample;
and (5) carrying out microhardness detection on the polished and polished sample.
With respect to the method for detecting microhardness of a metal sheet disclosed in the foregoing embodiments, it can be understood by those skilled in the art that the thickness of the metal sheet is increased in a winding manner, so that the thickness of the metal sheet meets the requirement of microhardness detection on the depth of an indentation and the requirement of microhardness detection on the distance of an edge, and the increase of the thickness of the metal sheet in a winding manner can enhance the capability of bearing pressure, avoid serious deformation during microhardness detection, and further obtain a relatively accurate result.
For the microhardness detection method of the metal sheet disclosed in the above embodiments, it can be understood by those skilled in the art that the metal sheet is wound to a predetermined thickness, and a specific value of the predetermined thickness can be determined by those skilled in the art according to actual conditions when implementing the microhardness detection method of the metal sheet, so that the winding thickness of the metal sheet can meet the requirements of microhardness detection on the indentation depth and the edge distance.
For the method for detecting microhardness of a metal sheet disclosed in the above embodiment, it can be understood by those skilled in the art that the grinding and polishing processes are performed on the sample to meet the surface quality requirement of microhardness detection, so as to ensure the precision of microhardness detection.
For the method for detecting microhardness of a metal sheet disclosed in the above embodiment, it can be understood by those skilled in the art that microhardness detection is performed on a polished and polished sample, and the microhardness detection can be performed on the polished and polished sample by a conventional method.
For the method for detecting microhardness of a metal sheet disclosed in the above embodiments, it can be understood by those skilled in the art that, when the method is used to detect microhardness of a metal sheet, the metal sheet without significant deformation or wrinkle should be selected as far as possible to detect, so as to prevent the accuracy of the detection result from being affected by the large deformation of the metal sheet during detection.
In some alternative embodiments, in the method for measuring microhardness of a metal sheet, the metal sheet is wound to a predetermined thickness, specifically:
a metal sheet will be wound on the bar to a predetermined thickness.
In some alternative embodiments, in the above method for measuring micro-hardness of a metal sheet, the rod is made of carbon steel or alloy steel so that the rod has a high hardness.
In some optional embodiments, in the method for detecting microhardness of a metal sheet, the polishing process is performed on the sample, specifically:
and sequentially polishing the sample by 180#, 400#, 600# and 800# sandpaper.
In some optional embodiments, in the method for detecting microhardness of a metal sheet, the polishing process is performed on the sample, specifically:
the sample was polished with a 2.5 μm polishing agent.
In some optional embodiments, in the method for measuring microhardness of a metal sheet, before winding the metal sheet to a predetermined thickness, the method further includes:
and cleaning the surface of the metal sheet.
In some alternative embodiments, in the method for measuring microhardness of a metal sheet, the cleaning of the surface of the metal sheet specifically includes:
the surface of the metal sheet is washed by absolute ethyl alcohol.
In some alternative embodiments, in the method for measuring microhardness of a metal sheet, before preparing a sample by using a sample setter, the method further includes:
and bundling the metal sheets wound to the preset thickness to prevent the wound metal sheets from loosening and influencing the detection result.
In some alternative embodiments, in the method for measuring microhardness of a metal sheet, the metal sheet wound to a predetermined thickness is bundled by:
the metal sheet wound to a predetermined thickness is bundled with a wire.
In some alternative embodiments, in the method for measuring microhardness of a metal sheet, the metal wire is a copper wire.
In some optional embodiments, in the method for detecting microhardness of a metal sheet, the microhardness of the ground and polished sample is detected by:
and (5) carrying out micro Vickers hardness detection on the polished and polished sample.
To demonstrate the effectiveness of the method for measuring microhardness of a metal sheet disclosed in the present application, the following tests are given in the examples of the present application:
directly carrying out microhardness detection on a metal copper strip, namely carrying out microhardness detection on a single-layer copper strip;
the microhardness detection method of the metal sheet disclosed by the embodiment of the application is used for carrying out microhardness detection on the metal copper strip, namely microhardness detection is carried out on a multilayer winding copper strip;
the results of microhardness measurements on single-layer copper strips and on multi-layer wound copper strips are shown in the following table:
as can be seen from the comparison in the above table, the results of microhardness detection performed on a single-layer copper strip and microhardness detection performed on a multi-layer wound copper strip are significantly different, wherein in the results of microhardness detection performed on a single-layer copper strip, the hardness value has a large discreteness and poor stability, and the hardness values detected on the surface and the side are small as a whole; in the detection result of microhardness detection on the multilayer winding copper strip, the hardness value is relatively stable, and the hardness value of the detection result meets the standard requirement.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.
Claims (8)
1. A method for detecting microhardness of a metal sheet is characterized by comprising the following steps:
selecting a metal sheet without obvious deformation or wrinkle, tightly winding multiple layers of metal sheets on the bar, wherein the multiple layers of metal sheets reach the preset thickness;
bundling a plurality of layers of metal sheets tightly wound on the bar to a predetermined thickness;
bundling a plurality of layers of metal sheets tightly wound on a bar material to a preset thickness, and preparing a sample by using a sample inlaying machine;
grinding and polishing the sample;
and (5) carrying out microhardness detection on the polished and polished sample.
2. The method for detecting microhardness of a metal sheet according to claim 1,
the rod is made of carbon steel or alloy steel.
3. The method for detecting microhardness of a metal sheet according to claim 1,
the sample is polished, and the method specifically comprises the following steps:
and sequentially polishing the sample by 180#, 400#, 600# and 800# sandpaper.
4. The method for detecting microhardness of a metal sheet according to claim 1,
the polishing treatment of the sample specifically comprises the following steps:
the sample was polished with a 2.5 μm polishing agent.
5. The method for detecting microhardness of a metal sheet according to claim 1,
before the metal sheet is tightly wound on the bar, the method also comprises the following steps:
and cleaning the surface of the metal sheet.
6. The method for detecting microhardness of a metal sheet according to claim 5,
the method for cleaning the surface of the metal sheet specifically comprises the following steps:
the surface of the metal sheet is washed by absolute ethyl alcohol.
7. The method for detecting microhardness of a metal sheet according to claim 1,
bundling a plurality of layers of metal sheets tightly wound on a bar material to a preset thickness, specifically:
a plurality of layers of metal sheets tightly wound on a bar to a predetermined thickness are bundled with a wire.
8. The method for detecting microhardness of a metal sheet according to claim 7,
the metal wire is a copper wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010663961.6A CN111678824B (en) | 2020-07-10 | 2020-07-10 | Metal sheet microhardness detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010663961.6A CN111678824B (en) | 2020-07-10 | 2020-07-10 | Metal sheet microhardness detection method |
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| Publication Number | Publication Date |
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| CN111678824A CN111678824A (en) | 2020-09-18 |
| CN111678824B true CN111678824B (en) | 2023-03-24 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR46728E (en) * | 1935-04-12 | 1936-08-10 | Machine for testing the hardness of metals, especially hard metals or thin blades | |
| CH412401A (en) * | 1961-05-03 | 1966-04-30 | Billingsfors Langed Ab | Method and device for testing the strength of a conveyed web of sheet or foil material |
| JP3266457B2 (en) * | 1995-05-25 | 2002-03-18 | 住友金属工業株式会社 | Automatic Rockwell hardness tester |
| CN103926139B (en) * | 2014-03-27 | 2016-04-20 | 济南大学 | A kind of fixture for measuring thin micro-thin hardened layer and method |
| CN111220490A (en) * | 2018-11-26 | 2020-06-02 | 青海大学 | Method for testing hardness of metal sheet sample |
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