CN108225864A - The measuring method of material elongation percentage - Google Patents
The measuring method of material elongation percentage Download PDFInfo
- Publication number
- CN108225864A CN108225864A CN201810052798.2A CN201810052798A CN108225864A CN 108225864 A CN108225864 A CN 108225864A CN 201810052798 A CN201810052798 A CN 201810052798A CN 108225864 A CN108225864 A CN 108225864A
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- CN
- China
- Prior art keywords
- elongation percentage
- impression
- measuring method
- rectangular pyramid
- material elongation
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Classifications
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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
-
- 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
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
Abstract
The invention discloses a kind of measuring method of material elongation percentage, including step：A1：It is demarcated in material predeterminated position and treats pressure mark；A2：Utilize ball pressure head pressure material home position to be pressed；A3：The surface area of impression is measured by scanner.By foregoing description it is found that in the measuring method of material elongation percentage provided by the invention, material surface is directly pressed using ball pressure head, the elongation percentage of material is measured by indentation method, avoids the need for individually sampling, and then significantly reduce the measurement difficulty of material elongation percentage.
Description
Technical field
The present invention relates to material elongation percentage field of measuring technique, more particularly to a kind of measuring method of material elongation percentage.
Background technology
The elongation percentage of material is one of conventional mechanical property of material, and tensile property is evaluation metal material mechanics performance
The key technical indexes and important evidence.
Specifically, when carrying out the measurement of material elongation percentage, it is sampled first, then carries out experiment experiment, then measure
Deformation quantity, finally calculates the relative elongation of material, and then can obtain elongation percentage.However, carrying out material elongation percentage measurement
When, it is required to be sampled every time, since sampling process is more complicated, the measurement difficulty of material elongation percentage is caused to increase
Therefore, the measurement difficulty of material elongation percentage how is reduced, is the technical issues of those skilled in the art are urgently to be resolved hurrily.
Invention content
The object of the present invention is to provide a kind of measuring method of material elongation percentage, to reduce the measurement of material elongation percentage hardly possible
Degree.
To achieve the above object, the present invention provides a kind of measuring method of material elongation percentage, including step：
A1：It is demarcated in material predeterminated position and treats pressure mark；
A2：Pressure mark center is treated using ball pressure head pressure material；
A3：The surface area S of impression is measured by scanner1。
Preferably, the surface roughness Ra of the material predeterminated position is not more than 1.6 μm, and the diameter of surface flat part
More than 3 times of the ball pressure head diameter.
Preferably, the step A1 includes extruding in home position material surface to be pressed by micro Vickers first
Position centered on rectangular pyramid impression, then centered on rectangular pyramid impression, respectively to orthogonal both direction every solid
Fixed spacing generates lateral rectangular pyramid impression and the rectangular pyramid impression of longitudinal direction with the Vickers hardness.
Preferably, two neighboring rectangular pyramid impression center spacing d is more than 3 times of rectangular pyramid impression catercorner length.
Preferably, step A4 is further included：Centered on the rectangular pyramid impression of center, the distance center four for not generating deformation is searched
N-th of rectangular pyramid impression of pyramid impression, obtains impression initial area S0=π (nd)2, elongation percentage A%=(S1-S0)/S0。
Preferably, the scanner is 3D scanners.
Preferably, demarcate treat pressure mark before, treat detection position and carry out polishing processing.
In the above-mentioned technical solutions, the measuring method of material elongation percentage provided by the invention, including step：A1：In material
Predeterminated position, which is demarcated, treats pressure mark；A2：Utilize ball pressure head pressure material home position to be pressed；A3：Impression is measured by scanner
Surface area.It is direct using ball pressure head by foregoing description it is found that in the measuring method of the material elongation percentage provided in the application
Material surface is pressed, the elongation percentage of material is measured by indentation method, avoids the need for individually sampling, and then significantly reduce material and prolong
Stretch the measurement difficulty of rate.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
The structure diagram of rectangular pyramid impression before the pressure that Fig. 1 is provided by the embodiment of the present invention；
The structure diagram of rectangular pyramid impression after the pressure that Fig. 2 is provided by the embodiment of the present invention.
In wherein Fig. 1-2：1- rectangular pyramid impressions.
Specific embodiment
The core of the present invention is to provide a kind of measuring method of material elongation percentage, to reduce the measurement of material elongation percentage hardly possible
Degree.
In order to which those skilled in the art is made to more fully understand technical scheme of the present invention, below in conjunction with the accompanying drawings and embodiment party
The present invention is described in further detail for formula.
It please refers to Fig.1 and Fig. 2, in a kind of specific embodiment, material elongation percentage that the specific embodiment of the invention provides
Measuring method, including step：
A1：It is demarcated in material predeterminated position and treats pressure mark.
In order to improve measurement accuracy, it is preferred that the surface roughness Ra of material predeterminated position is not more than 1.6 μm, and surface
The diameter of flat part is more than 3 times of ball pressure head diameter.Specifically, it is preferable that demarcate treat pressure mark before, treat detection position into
Row polishes processing.
Specifically, the step specifically includes：It is pressed first by micro Vickers in material surface home position to be pressed
Go out position centered on rectangular pyramid impression 1；Then it is every to orthogonal both direction respectively centered on rectangular pyramid impression 1
Lateral rectangular pyramid impression 1 and the rectangular pyramid impression 1 of longitudinal direction are generated every the fixed spacing Vickers hardness.
A2：Utilize ball pressure head pressure material home position to be pressed.
Specifically, the position of adjustment ball pressure head, it is ensured that the center of ball pressure head Center-to-Center rectangular pyramid impression 1 overlaps, and applies
It loads lotus and generates spherical impression on surface；
A3：The surface area of impression is measured by scanner.
In order to improve measurement accuracy, it is preferable that scanner is 3D scanners.
By foregoing description it is found that in the measuring method of material elongation percentage provided in the application specific embodiment, directly
The elongation percentage that pressure material surface measures material by indentation method is connect, avoids the need for individually sampling, and then significantly reduce material
The measurement difficulty of elongation percentage.
To improve measurement accuracy, impression spacing cannot be too big, it is preferable that two neighboring 1 center spacing d of rectangular pyramid impression is more than
3 times of rectangular pyramid impression catercorner length.
Further, the measuring method of the material elongation percentage further includes step A4：Centered on center rectangular pyramid impression 1, look into
N-th of rectangular pyramid impression 1 of the distance center rectangular pyramid impression 1 for not generating deformation is looked for, such as shown in Fig. 2, the four of label mark
Pyramid impression 1 is undeformed impression, specifically, the shape of comparison rectangular pyramid impression 1, finds the rectangular pyramid impression not deformed
1 (using center as starting point, n-th, due to symmetrical, four direction is all that n-th of rectangular pyramid impression 1 does not deform), as
Boundary calculates deformed area S using 3D scanning softwares1, the area S before deformation0It can obtain in this way：It is exactly initial that n, which is multiplied by d,
Radius, S0=π (nd)2, elongation percentage A%=(S1-S0)/S0, as shown in Fig. 2, n=4.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications of these embodiments will be apparent for those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide range caused.
Claims (7)
1. a kind of measuring method of material elongation percentage, which is characterized in that including step：
A1：It is demarcated in material predeterminated position and treats pressure mark；
A2：Pressure mark center is treated using ball pressure head pressure material；
A3：The surface area S of impression is measured by scanner1。
2. the measuring method of material elongation percentage according to claim 1, which is characterized in that the table of the material predeterminated position
Surface roughness Ra is not more than 1.6 μm, and the diameter of surface flat part is more than 3 times of the ball pressure head diameter.
3. the measuring method of material elongation percentage according to claim 1, which is characterized in that the step A1 includes logical first
Micro Vickers position centered on home position material surface to be pressed extrudes rectangular pyramid impression (1) is crossed, then with four
Centered on pyramid impression (1), generated respectively to orthogonal both direction every the fixed spacing Vickers hardness horizontal
To rectangular pyramid impression (1) and longitudinal direction rectangular pyramid impression (1).
4. the measuring method of material elongation percentage according to claim 3, which is characterized in that two neighboring rectangular pyramid impression
(1) spacing d in center is more than 3 times of rectangular pyramid impression catercorner length.
5. the measuring method of material elongation percentage according to claim 4, which is characterized in that further include step A4：With center
Centered on rectangular pyramid impression (1), n-th of rectangular pyramid impression of the distance center rectangular pyramid impression (1) for not generating deformation is searched
(1), impression initial area S is obtained0=π (nd)2, elongation percentage A%=(S1-S0)/S0。
6. the measuring method of material elongation percentage according to claim 1, which is characterized in that the scanner is scanned for 3D
Instrument.
7. the measuring method of the material elongation percentage according to any one of claim 1-6, which is characterized in that wait to press demarcating
Before mark, treat detection position and carry out polishing processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052798.2A CN108225864B (en) | 2018-01-19 | 2018-01-19 | Method for measuring elongation of material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810052798.2A CN108225864B (en) | 2018-01-19 | 2018-01-19 | Method for measuring elongation of material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108225864A true CN108225864A (en) | 2018-06-29 |
| CN108225864B CN108225864B (en) | 2020-10-20 |
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|---|---|---|---|
| CN201810052798.2A Active CN108225864B (en) | 2018-01-19 | 2018-01-19 | Method for measuring elongation of material |
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| CN108225864B (en) | 2020-10-20 |
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Address after: No. 2096, Beijing New Energy Technology Research Institute Patentee after: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION Co.,Ltd. Address before: No. 2096, Beijing New Energy Technology Research Institute Patentee before: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION CENTER Address after: No. 2096, Beijing New Energy Technology Research Institute Patentee after: Guoneng boiler and Pressure Vessel Inspection Co.,Ltd. Address before: No. 2096, Beijing New Energy Technology Research Institute Patentee before: GUODIAN BOILER AND PRESSURE VESSEL INSPECTION Co.,Ltd. |