CN110441306A - A method of sorbite percentage in measurement high carbon wire rod wire rod metallographic test block - Google Patents
A method of sorbite percentage in measurement high carbon wire rod wire rod metallographic test block Download PDFInfo
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- CN110441306A CN110441306A CN201910805642.1A CN201910805642A CN110441306A CN 110441306 A CN110441306 A CN 110441306A CN 201910805642 A CN201910805642 A CN 201910805642A CN 110441306 A CN110441306 A CN 110441306A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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Abstract
The embodiment of the present invention provides a kind of method for measuring sorbite percentage in the metallographic test block of high carbon wire rod wire rod, which comprises obtains the digital picture of high carbon wire rod wire rod metallographic test block；Digital picture is read by image processing software, obtain the rgb value of all pixels point in digital picture, RGB threshold value is set in image processing software, RGB threshold value is higher than the rgb value of all pixels point, the rgb value of digital picture medium pearlite field color is modified to higher than RGB threshold value；The percentage of the pixel number of entire digital picture is accounted for by the pixel number of perlitic range after image processing software statistics modification, pearlite accounts for the area percent of entire digital picture after being modified, and the area percent of remaining digital picture is the area percent that sorbite accounts for entire digital picture；By sorbitic area percent, the percentage by volume that sorbite accounts for entire metallographic test block is obtained；According to the technique and scheme of the present invention, size, shape and the distribution characteristics of measured phase can be shown visual and clearly.
Description
Technical field
The present invention relates to metal material tissue metallographic determination techniques field more particularly to a kind of measurement high carbon wire rod wire rod gold
The method of sorbite percentage in phase test block.
Background technique
Soxhlet body tissue is mainly obtained after high-carbon steel wire rod hot rolling, and there is good drawing property.82B high-carbon wire rod is raw
The primary raw material for producing high strength low relaxed prestress concrete structure steel wire and steel strand wires, since PC steel wire and steel strand wires are extensive
For key projects such as skyscraper, bridge, petrochemical industry, railways.As high-carbon steel wire rod yield increases substantially and its produces
The extensive use of product, factory and product industry also increasingly pay attention to its sorbite percentage index, it is desirable that high-carbon wire rod will have
Higher sorbite percentage.Method for measuring sorbite percentage, in view of the image analyzer of each model is mutual in the world at present
Incompatible and high power metallographic structure micro- feature, metallurgy industry standard (YB/T 169-2000) use quantitative metallography hand
The referee method that work detection method is detected as sorbite percentage.
Quantitative metallography, which refers to by measuring two-dimensional parametric in metallographic flour milling, calculates the side of metallographic structure content in three-dimensional space
Method.Regulation craft quantitative metallography method has grid number point method, grid division lines method, the measurement of microscope ocular scale in GB/T 15749
Method, and there are some drawbacks for the manual quantitative metallography measurement method of these types.When determining sorbitic determining ratio, different inspections
Analysis personnel or the same person are tested in different time, bigger resultant error often occurs in the result of measurement.And for
Other non-Metallographic Techniques engineering staffs can not show the size, shape and distribution characteristics of pearlite colony clear and intuitively.
Nowadays computer is widely used in metallographic processing system, there is numerous metallic phase image processing systems both at home and abroad.But
Since pearlitic structrure is lamellar structure, and image analysis system is to extract feature by gray threshold mutually to carry out processing survey
Amount, in this way when automatically extracting pearlite phase, picture system can only extract the bright synusia of pearlite, rather than complete pearly-lustre
Body group, hence it is evident that there are biggish errors.
Therefore the prior art has the following problems: when quantitative metallography method automatically extracts pearlite phase, image analysis system
It is to extract feature by gray threshold mutually to carry out processing measurement, in this way when automatically extracting pearlite phase, picture system only can
The bright synusia of extraction pearlite, rather than complete pearlite colony, hence it is evident that there are biggish errors.
Summary of the invention
The embodiment of the present invention provides a kind of method for measuring sorbite percentage in the metallographic test block of high carbon wire rod wire rod, the present invention
Purpose be for prior art traditional quantitative metallographic method measure sorbite percentage process the problem of, propose one kind
The method that sorbite percentage is accurately obtained to high-carbon wire rod sample.
In order to achieve the above objectives, the embodiment of the present invention provides sorbite in a kind of measurement high carbon wire rod wire rod metallographic test block and contains
The method of amount, which comprises
Step A: the digital picture of high carbon wire rod wire rod metallographic test block is obtained；
Step B: reading the digital picture by image processing software, obtains all pixels point in the digital picture
Rgb value sets RGB threshold value in image processing software, and the RGB threshold value is higher than the rgb value of all pixels point, will be described
The rgb value of digital picture medium pearlite field color is modified to higher than RGB threshold value；
Step C: entire digitized map is accounted for by the pixel number that image processing software counts perlitic range after the modification
The percentage of the pixel number of picture obtains the area percent that pearlite after the modification accounts for entire digital picture, remaining number
The area percent of word image is the area percent that the sorbite accounts for entire digital picture；
Step D: by the sorbitic area percent, the volume hundred that the sorbite accounts for entire metallographic test block is obtained
Score.
Above-mentioned technical proposal have the following beneficial effects: the present invention by using human-computer interaction progress image enhancement contrast,
Perlitic range is smeared into the color for having bigger difference with sorbite gray scale, the pixel number that then statistics calculates the region accounts for
The percentage of the pixel number of whole image, it can Accurate Determining goes out sorbitic area percentage composition；The present invention only counts increasing
Region area after strong, it can intuitive, the sorbitic content of accurately measure can also clearly show pearlite colony
Size, shape and distribution characteristics, more fully to the understanding of Tissue distribution in high-carbon wire rod；So that the present invention is in exploitation 82B
In Wire Rod and subsequent optimizing process, more accurate sorbite percentage is obtained, accelerates development progress and period, is realized
The steady production of the product obtains stable mechanical performance and the good hot rolling high carbon wire rod wire rod of drawing property.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the process of sorbite percentage method in a kind of measurement high carbon wire rod wire rod metallographic test block of the embodiment of the present invention
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, for sorbite percentage side in a kind of measurement high carbon wire rod wire rod metallographic test block of the embodiment of the present invention
The flow chart of method, which comprises
It is hard to acquire high-carbon by optical microscopy under 500 times for the digital picture for obtaining the metallographic test block of high carbon wire rod wire rod
The microscopic digital image of drum metallographic test block, so that collected digital picture is more clear, preferably convenient for operator
Distinguish perlitic range and Soxhlet body region.
Operator reads the digital picture by image processing software, obtains all pixels point in the digital picture
Rgb value, in image processing software set RGB threshold value, the RGB threshold value be higher than all pixels point rgb value, by institute
The rgb value for stating digital picture medium pearlite field color is modified to higher than RGB threshold value, according in the digital picture set
Rgb value, the pixel number that perlitic range after the modification is counted by Photoshop image processing software account for entire number
The percentage of image pixel points, obtains the area percent that pearlite after the modification accounts for entire digital picture, and use 100% subtracts
Obtained pearlite area percent is gone, the area percent of remaining digital picture is that the sorbite accounts for entire digitized map
The area percent of picture.
It is acquired during metallographic quantitative determination and the micro-image of processing is digital picture, with JPEG or BMP format
It is stored in computer.There are three values in a computer for each pixel of digital picture to indicate (R- is red, G- is green, B- is blue),
The value range of each value is [0,255], and other colors are by these three values Lai compound expression.Such as R=255, G=0 when red,
B=0, R=0 when blue, G=0, B=255, etc., so only it is to be understood that the rgb value of some pixel can be carried out counting
It calculates, to calculate the area percentage of some particular color range in digital picture.
Further, when setting RGB threshold value in image processing software, R value is only set, using R as signals, G, B value are not
Setting, while RGB 2 values therein or 3 values can also be set.
For example, using R as signals, G, B value are not provided with, and are passed through when setting RGB threshold value in image processing software
Photoshop image processing software reads 1 digital picture, obtains the rgb value of all pixels point in digital picture are as follows: R is in 50-
80, G in 50-75, and B sets RGB threshold value, it is 100 that RGB threshold value, which is specifically set as R, G, B in 55-80 in image processing software
It is not provided with, is being revised as the R value of the digital picture medium pearlite field color by Photoshop image processing software
120, G, B is remained unchanged, and the quantity of pixel of all R values higher than 100 is counted by Photoshop image processing software,
The percentage that all R values account for entire Pixel of Digital Image points higher than the quantity of 100 pixel is calculated, obtained percentage is
Perlitic range accounts for the percentage of entire digital picture area, and use 100% subtracts obtained pearlite area percent, remaining
The area percent of digital picture be that the sorbite accounts for the area percent of entire digital picture.
The C++ program code for wherein measuring rgb value is as follows:
By the sorbitic area percent, the percentage by volume that the sorbite accounts for entire metallographic test block is obtained,
It is to be realized by exchangeable formulas, the exchangeable formulas is AA=VV；Wherein, AAFor phase area percentage to be measured, VVFor phase to be measured
Percentage by volume.
Specifically, the exchangeable formulas is AA=VVThe P in national GB/T 15749P=LL=AA=VV；Wherein, PPFor
Crosspoint percentage to be measured, LLFor phase transversal percentage to be measured, AAFor phase area percentage to be measured, VVFor phase volume percentage to be measured
Number.
It should be understood that the particular order or level of the step of during disclosed are the examples of illustrative methods.Based on setting
Count preference, it should be appreciated that in the process the step of particular order or level can be in the feelings for the protection scope for not departing from the disclosure
It is rearranged under condition.Appended claim to a method is not illustratively sequentially to give the element of various steps, and not
It is to be limited to the particular order or level.
In above-mentioned detailed description, various features are combined together in single embodiment, to simplify the disclosure.No
This published method should be construed to reflect such intention, that is, the embodiment of theme claimed needs to compare
It is relatively clear comprehensively to understand meaning or content represented by the feature stated in each claim.On the contrary, such as appended right
As claim reflects, the present invention is in the state fewer than whole features of disclosed single embodiment.Therefore, institute
Attached claims are hereby expressly incorporated into detailed description, and wherein each claim is used as alone of the invention individual
Preferred embodiment.
For can be realized any technical staff in the art or using the present invention, above to disclosed embodiment into
Description is gone.To those skilled in the art；The various modifications mode of these embodiments will be apparent from, and this
The General Principle of text definition can also be suitable for other embodiments on the basis of not departing from the spirit and scope of the disclosure.
Therefore, the disclosure is not limited to embodiments set forth herein, but most wide with principle disclosed in the present application and novel features
Range is consistent.
Description above includes the citing of one or more embodiments.Certainly, in order to describe above-described embodiment and description portion
The all possible combination of part or method is impossible, but it will be appreciated by one of ordinary skill in the art that each implementation
Example can do further combinations and permutations.Therefore, embodiment described herein is intended to cover fall into the appended claims
Protection scope in all such changes, modifications and variations.In addition, with regard to term used in specification or claims
The mode that covers of "comprising", the word is similar to term " includes ", just as " including " solved in the claims as transitional word
As releasing.In addition, the use of any one of specification in claims term "or" being to indicate " non-exclusionism
Or ".
Those skilled in the art will also be appreciated that the various illustrative components, blocks that the embodiment of the present invention is listed
(illustrative logical block), unit and step can by electronic hardware, computer software, or both knot
Conjunction is realized.For the replaceability (interchangeability) for clearly showing that hardware and software, above-mentioned various explanations
Property component (illustrative components), unit and step universally describe their function.Such function
It can be that the design requirement for depending on specific application and whole system is realized by hardware or software.Those skilled in the art
Can be can be used by various methods and realize the function, but this realization is understood not to for every kind of specific application
Range beyond protection of the embodiment of the present invention.
Various illustrative logical blocks or unit described in the embodiment of the present invention can by general processor,
Digital signal processor, specific integrated circuit (ASIC), field programmable gate array or other programmable logic devices, discrete gate
Or transistor logic, discrete hardware components or above-mentioned any combination of design carry out implementation or operation described function.General place
Managing device can be microprocessor, and optionally, which may be the processor, controller, microcontroller of any fixation
Device or state machine.Processor can also be realized by the combination of computing device, such as digital signal processor and microprocessor,
Multi-microprocessor, one or more microprocessors combine a digital signal processor core or any other like configuration
To realize.
The step of method described in the embodiment of the present invention or algorithm can be directly embedded into hardware, processor execute it is soft
The combination of part module or the two.Software module can store in RAM memory, flash memory, ROM memory, EPROM storage
Other any form of storaging mediums in device, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or this field
In.Illustratively, storaging medium can be connect with processor, so that processor can read information from storaging medium, and
It can be to storaging medium stored and written information.Optionally, storaging medium can also be integrated into the processor.Processor and storaging medium can
To be set in asic, ASIC be can be set in user terminal.Optionally, processor and storaging medium also can be set in
In different components in the terminal of family.
In one or more exemplary designs, above-mentioned function described in the embodiment of the present invention can be in hardware, soft
Part, firmware or any combination of this three are realized.If realized in software, these functions be can store and computer-readable
On medium, or it is transferred on a computer readable medium in the form of one or more instructions or code forms.Computer readable medium includes electricity
Brain storaging medium and convenient for so that computer program is allowed to be transferred to from a place telecommunication media in other places.Storaging medium can be with
It is that any general or special computer can be with the useable medium of access.For example, such computer readable media may include but
It is not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storages, disk storage or other magnetic storage devices or other
What can be used for carry or store with instruct or data structure and it is other can be by general or special computer or general or specially treated
The medium of the program code of device reading form.In addition, any connection can be properly termed computer readable medium, example
Such as, if software is to pass through a coaxial cable, fiber optic cables, double from a web-site, server or other remote resources
Twisted wire, Digital Subscriber Line (DSL) are defined with being also contained in for the wireless way for transmitting such as example infrared, wireless and microwave
In computer readable medium.The disk (disk) and disk (disc) includes compress disk, radium-shine disk, CD, DVD, floppy disk
And Blu-ray Disc, disk is usually with magnetic replicate data, and disk usually carries out optically replicated data with laser.Combinations of the above
Also it may be embodied in computer readable medium.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of method of sorbite percentage in measurement high carbon wire rod wire rod metallographic test block characterized by comprising
Step A: the digital picture of high carbon wire rod wire rod metallographic test block is obtained；
Step B: reading the digital picture by image processing software, obtains the RGB of all pixels point in the digital picture
Value sets RGB threshold value in image processing software, and the RGB threshold value is higher than the rgb value of all pixels point, by the number
The rgb value of word image medium pearlite field color is modified to higher than RGB threshold value；
Step C: entire digital picture is accounted for by the pixel number that image processing software counts perlitic range after the modification
The percentage of pixel number obtains the area percent that pearlite after the modification accounts for entire digital picture, remaining digitized map
The area percent of picture is the area percent that the sorbite accounts for entire digital picture；
Step D: by the sorbitic area percent, the volume basis that the sorbite accounts for entire metallographic test block is obtained
Number.
2. the method according to claim 1, wherein the step A specifically:
By optical microscopy, the microscopic digital image of high carbon wire rod wire rod metallographic test block is acquired under 500 times.
3. the method according to claim 1, wherein the step B specifically:
According to the rgb value in the digital picture set, pearl after the modification is measured by Photoshop image processing software
The pixel number in body of light region accounts for the percentage of entire Pixel of Digital Image points, and use 100% subtracts obtained pearly-lustre dignity
Product percentage, the remaining percentage obtained is sorbite area percent.
4. obtaining the method according to claim 1, wherein described by the sorbitic area percent
The sorbite accounts for the percentage by volume of entire metallographic test block, is realized by exchangeable formulas:
The exchangeable formulas is AA=VV；
Wherein, AAFor phase area percentage to be measured, VVFor phase volume percentage to be measured.
5. the method according to claim 1, wherein the setting RGB threshold value in image processing software is specific
Include:
When setting RGB threshold value in image processing software, R value is only set, using R as signals, G, B value are not provided with.
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Cited By (2)
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| CN112326296A (en) * | 2020-10-20 | 2021-02-05 | 柳州钢铁股份有限公司 | Sampling method and system suitable for analyzing metallographic structure and Agt performance relation |
| CN113466230A (en) * | 2021-06-29 | 2021-10-01 | 武汉钢铁有限公司 | Quantitative measurement method for pearlite and sorbite content of high-carbon steel wire |
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Application publication date: 20191112 |