CN109254081A - The method and apparatus for measuring graphite attribute inside gray cast iron - Google Patents
The method and apparatus for measuring graphite attribute inside gray cast iron Download PDFInfo
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- CN109254081A CN109254081A CN201811245001.7A CN201811245001A CN109254081A CN 109254081 A CN109254081 A CN 109254081A CN 201811245001 A CN201811245001 A CN 201811245001A CN 109254081 A CN109254081 A CN 109254081A
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- cast iron
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/015—Attenuation, scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
Abstract
Present disclose provides a kind of methods of graphite attribute inside measurement gray cast iron, obtain the attenuation coefficient of the gray cast iron material based on standard sample；Gray cast iron to be measured is detected, multiple a variety of data for gray cast iron to be measured are obtained；It is compared according to a variety of data detected with the attenuation coefficient of the gray cast iron material of standard sample, completes the measurement of graphite attribute inside gray cast iron.This method completion lossless quickly can be measured gray cast iron material graphite length scale, live product detection efficiency is remarkably improved in production testing, it is a kind of economic and practical detection method, and there is ease for use and applicability, and this method is simple and fast, economic and practical, detection efficiency is high.The disclosure additionally provides a kind of device of measurement gray cast iron inside graphite attribute.
Description
Technical field
This disclosure relates to field of measuring technique be tested, in particular to graphite attribute inside a kind of measurement gray cast iron
Method and apparatus.
Background technique
In the prior art, gray cast iron refers to the cast iron with flake graphite, has excellent machinability, castability
Energy and vibration absorbing performance, anti-attrition is good, and notch sensitivity is small, and compression strength is high, is widely used in the portions such as lathe fuselage, brake disc
Position, or even for manufacturing automobile engine.But since the intensity, hardness and plasticity of graphite are relatively low, Graphite Distribution is in metal
Matrix, the effective area decline that metallic matrix can be made to carry, while in the form of sheets, there are stress concentrations for sharp corner for graphite in gray cast iron
Phenomenon is an important factor for influencing Mechanical Properties of Grey Cast Iron, and graphite is coarseer, and the mechanical property of gray cast iron is poorer.Therefore to ash
The detection of cast iron graphite length scale is and its necessary.
Further, current common detection method is metallographic method, and metallographic method can intuitively show stone inside gray cast iron material
Situations such as black pattern, size and distribution, but this is a kind of destructive detection, fabricated part cannot be directed to, in addition to large-scale workpiece
It is also very inconvenient when sampling, while sample preparation difficulty is larger, and cannot represent completely monolith gray cast iron inside workpiece graphite pattern,
Size and distribution situations such as, along with detection cycle it is longer, be unfavorable for high-volume quickly detection, engineering application in by compared with
Big restriction.
Summary of the invention
In order to solve cannot to show graphite inside gray cast iron material for fabricated part and large-scale workpiece in the prior art
Pattern, size and distribution situation, and graphite inside the gray cast iron material of the fabricated part and large-scale workpiece detection for batch
Pattern, size and distribution situation do not have the problem of agility and high efficiency, and the embodiment of the present disclosure provides a kind of measurement ash casting
The method and apparatus of graphite attribute inside iron, and in particular to a kind of simple ultrasonic wave sending and receiving apparatus can be lossless quick
Ground is measured gray cast iron material graphite length scale, and live product detection efficiency is remarkably improved in production testing, is
A kind of economic and practical detection method, and there is ease for use and applicability.
In a first aspect, the embodiment of the present disclosure provides a kind of method of measurement gray cast iron inside graphite attribute, including following
Step: the attenuation coefficient of the gray cast iron material based on standard sample is obtained；Gray cast iron to be measured is detected, multiple be directed to is obtained
A variety of data of the gray cast iron to be measured；According to the gray cast iron material of a variety of data and standard sample that detect
The attenuation coefficient is compared, and completes the measurement of graphite attribute inside the gray cast iron.
The attenuation coefficient for obtaining the gray cast iron material based on standard sample includes: logical in one of the embodiments,
Cross declining for the gray cast iron material that at least one supersonic detector and at least one normal probe are set to the standard sample
Subtract coefficient to be received.
In one of the embodiments, it is described obtain the gray cast iron material based on standard sample attenuation coefficient include: by
The gray cast iron material of default graphite length scale is defined as the gray cast iron material of the standard sample；According to ultrasonic wave
A type pulse reflection method measures and calculates the attenuation coefficient of the gray cast iron material to ultrasonic wave of the standard sample,
In, the thickness of workpiece of the gray cast iron material based on the standard sample is t, and ultrasonic attenuation is x decibels, based on described
The attenuation coefficient of the gray cast iron material of standard sample is defined as k0, k0=x/t.
The gray cast iron of the basis detects in one of the embodiments, a variety of data and standard sample
The attenuation coefficient of material is compared, and the measurement for completing graphite attribute inside the gray cast iron includes: to the multiple of acquisition
It is extracted for the attenuation coefficient in a variety of data of the gray cast iron to be measured and is defined as k；It will be directed to described to be measured
The attenuation coefficient of the gray cast iron material of the attenuation coefficient and standard sample of gray cast iron carries out difference calculating
It compares, completes the measurement of graphite attribute inside the gray cast iron.
It is described in one of the embodiments, to be tried for the attenuation coefficient of the gray cast iron to be measured and the standard
The attenuation coefficient of the gray cast iron material of sample carries out difference calculating ratio pair, completes graphite attribute inside the gray cast iron
Measurement includes: the institute when the gray cast iron material of the attenuation coefficient and standard sample for the gray cast iron to be measured
It states attenuation coefficient and carries out difference calculating, difference then determines that graphite length is up to standard inside the gray cast iron to be measured less than 0.
It is described in one of the embodiments, to be tried for the attenuation coefficient of the gray cast iron to be measured and the standard
The attenuation coefficient of the gray cast iron material of sample carries out difference calculating ratio pair, completes graphite attribute inside the gray cast iron
Measurement includes: the institute when the gray cast iron material of the attenuation coefficient and standard sample for the gray cast iron to be measured
It states attenuation coefficient and carries out difference calculating, difference is greater than 0, then determines that graphite length is below standard inside the gray cast iron to be measured.
Second aspect, the embodiment of the present disclosure provide a kind of computer readable storage medium, are stored thereon with computer journey
The step of sequence, which realizes above-mentioned method when being executed by processor.
The third aspect, the embodiment of the present disclosure provide a kind of computer equipment, including memory, processor and are stored in
On reservoir and the computer program that can run on a processor, the processor realize above-mentioned method when executing described program
Step.
Fourth aspect, the embodiment of the present disclosure provide a kind of device of measurement gray cast iron inside graphite attribute, described device
It include: the first acquisition module, for obtaining the attenuation coefficient of the gray cast iron material based on standard sample；Second obtains module, uses
It is detected in gray cast iron to be measured, obtains multiple a variety of data for the gray cast iron to be measured；It compares and measurement module, use
It is compared according to a variety of data detected with the attenuation coefficient of the gray cast iron material of standard sample, it is complete
At the measurement of graphite attribute inside the gray cast iron.
The first acquisition module is straight at least one by least one supersonic detector in one of the embodiments,
Probe composition.
The method and apparatus of graphite attribute, obtain based on standard sample inside a kind of measurement gray cast iron provided by the invention
The attenuation coefficient of gray cast iron material；Gray cast iron to be measured is detected, multiple a variety of data for gray cast iron to be measured are obtained；Root
It is compared according to a variety of data detected with the attenuation coefficient of the gray cast iron material of standard sample, completes graphite inside gray cast iron
The measurement of attribute.This method solves to show inside gray cast iron material for fabricated part and large-scale workpiece in the prior art
Graphite morphology, size and distribution situation, and inside the gray cast iron material of the fabricated part and large-scale workpiece detection for batch
Graphite morphology, size and distribution situation do not have the problem of agility and high efficiency, and complete lossless quickly to cast ash
Iron material graphite length scale is measured, and live product detection efficiency is remarkably improved in production testing, is a kind of economy
Applicable detection method, and there is ease for use and applicability, and this method is simple and fast, economic and practical, detection efficiency is high.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the embodiment of the present disclosure, below to needed in embodiment description
Attached drawing is briefly described:
Fig. 1 is that the step process for the method that one of one embodiment of the invention measures gray cast iron inside graphite attribute is shown
It is intended to；
Fig. 2 (a) is the short stone inside one of one embodiment of the invention measurement gray cast iron in the method for graphite attribute
The schematic diagram of black cast iron；
Fig. 2 (b) is the feldspar inside one of one embodiment of the invention measurement gray cast iron in the method for graphite attribute
The schematic diagram of black cast iron；And
Fig. 3 is the structural representation that one of one embodiment of the invention measures the device of graphite attribute inside gray cast iron
Figure.
Specific embodiment
The application is further discussed in detail with reference to the accompanying drawings and examples.
In following introductions, term " first ", " second " only for descriptive purposes, and should not be understood as instruction or dark
Show relative importance.Following introductions provide multiple embodiments of the disclosure, can replace or merge between different embodiments
Combination, therefore the application is it is also contemplated that all possible combinations comprising documented identical and/or different embodiments.Thus, such as
Fruit one embodiment include feature A, B, C, another embodiment include feature B, D, then the application also should be regarded as include containing
A, the every other possible combined embodiment of one or more of B, C, D, although the embodiment may be in the following contents
In have specific literature record.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure carries out further specifically the specific embodiment of the method and apparatus of graphite attribute inside present invention measurement gray cast iron
It is bright.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.
In view of problem of the prior art, the method and apparatus that the disclosure proposes a kind of measurement gray cast iron inside graphite attribute,
Come solve to show for fabricated part and large-scale workpiece in the prior art graphite morphology inside gray cast iron material, size and
Distribution situation, and for batch fabricated part and large-scale workpiece detection gray cast iron material inside graphite morphology, size and
Distribution situation does not have the problem of agility and high efficiency.This allow for it is efficient, accurate, quickly measurement gray cast iron inside graphite
The method of attribute becomes the work that an existing learning value has realistic meaning again.
As shown in Figure 1, measuring the process signal of the method for graphite attribute inside gray cast iron for one of one embodiment
Figure, specifically includes the following steps:
Step 102, the attenuation coefficient of the gray cast iron material based on standard sample is obtained.
In one embodiment, the attenuation coefficient for obtaining the gray cast iron material based on standard sample includes: by being arranged extremely
A few supersonic detector is received with attenuation coefficient of at least one normal probe to the gray cast iron material of standard sample.
Further, the attenuation coefficient for obtaining the gray cast iron material based on standard sample includes: by default graphite length etc.
The gray cast iron material of grade is defined as the gray cast iron material of standard sample；It is measured according to ultrasonic wave A type pulse reflection method and calculates mark
Attenuation coefficient of the gray cast iron material of quasi- sample to ultrasonic wave, wherein the thickness of workpiece of the gray cast iron material based on standard sample
For t, ultrasonic attenuation is x decibels, and the attenuation coefficient of the gray cast iron material based on standard sample is defined as k0, k0=x/t.
Step 104, gray cast iron to be measured is detected, obtains multiple a variety of data for gray cast iron to be measured.
Step 106, it is compared according to a variety of data detected with the attenuation coefficient of the gray cast iron material of standard sample,
Complete the measurement of graphite attribute inside gray cast iron.
Specifically, be compared according to a variety of data detected with the attenuation coefficient of the gray cast iron material of standard sample,
The measurement of graphite attribute includes: the decaying in multiple a variety of data for gray cast iron to be measured to acquisition inside completion gray cast iron
Coefficient extracts and is defined as k；It will be for the decaying of the gray cast iron material of the attenuation coefficient and standard sample of gray cast iron to be measured
Coefficient carries out difference calculating ratio pair, completes the measurement of graphite attribute inside gray cast iron.It further, will be for gray cast iron to be measured
The attenuation coefficient of the gray cast iron material of attenuation coefficient and standard sample carries out difference calculating ratio pair, completes graphite category inside gray cast iron
Property measurement include: when for gray cast iron to be measured attenuation coefficient and standard sample gray cast iron material attenuation coefficient carry out it is poor
Value calculates, and difference then determines that graphite length is up to standard inside gray cast iron to be measured less than 0.When the attenuation coefficient for being directed to gray cast iron to be measured
Difference calculating is carried out with the attenuation coefficient of the gray cast iron material of standard sample, difference is greater than 0, then determines stone inside gray cast iron to be measured
Black length is below standard.
For graphite attribute inside a kind of more clear measurement gray cast iron proposed with accurately understanding with the application disclosure
Method, carry out following example.It should be noted that disclosure protection scope is not limited to following example.
As shown in Fig. 2 (a)-(b), Fig. 2 (a) is that one of one embodiment of the invention measures graphite category inside gray cast iron
The schematic diagram of short graphite cast iron in the method for property；Fig. 2 (b) is that one of one embodiment of the invention measures inside gray cast iron
The schematic diagram of long graphite cast iron in the method for graphite attribute.Specifically, the disclosure uses ultrasonic wave A type pulse reflection method, tool
Body principle are as follows: ultrasonic wave makees straightline propagation in even resilient medium, and reflection will be generated when encountering interface, in certain wavelength
Under the conditions of, the bigger reflection loss in interface is more obvious.There are a large amount of flake graphites inside gray cast iron material, this flake graphite is got over
Greatly, stronger to the reflex of ultrasonic wave, attenuation coefficient when ultrasonic wave is propagated inside it is also bigger.It declines by comparing
Subtract the size of coefficient, it will be able to infer graphite length and graphite length in the standard sample of known graphite length inside sample
Relationship, to rapidly judge whether the graphite length inside tested graphite cast iron up to standard.
It should be noted that detection method are as follows: using the gray cast iron material of known graphite length scale as standard sample, benefit
It is measured with ultrasonic wave sending and receiving apparatus, such as supersonic detector combination normal probe and is calculated the gray cast iron to ultrasonic wave
Attenuation coefficient k0, that is, thickness of workpiece is set as t, and ultrasonic attenuation is x decibels, then k0=x/t.Emitted using same set of ultrasonic wave
Reception device detects sample, calculates sample to the attenuation coefficient k of ultrasonic wave, finally compares k and k0's
Size, if: k-k0< 0 illustrates that sample is less than standard sample to the decaying system of ultrasonic wave to the attenuation coefficient of ultrasonic wave
Number, shorter with sample graphite length known to this, sample graphite length is up to standard；K-k0> 0, illustrates sample pair
The attenuation coefficient of ultrasonic wave is greater than standard sample to the attenuation coefficient of ultrasonic wave, knows that sample graphite length is longer with this,
Sample graphite length is not up to standard.
The method of graphite attribute, obtains the gray cast iron based on standard sample inside a kind of measurement gray cast iron provided by the invention
The attenuation coefficient of material；Gray cast iron to be measured is detected, multiple a variety of data for gray cast iron to be measured are obtained；According to detection
To a variety of data be compared with the attenuation coefficient of the gray cast iron material of standard sample, complete graphite attribute inside gray cast iron
Measurement.This method solves to show graphite shape inside gray cast iron material for fabricated part and large-scale workpiece in the prior art
Looks, size and distribution situation, and graphite shape inside the gray cast iron material of the fabricated part and large-scale workpiece detection for batch
Looks, size and distribution situation do not have the problem of agility and high efficiency, and completing can be lossless quickly to gray cast iron material
Graphite length scale is measured, and live product detection efficiency is remarkably improved in production testing, is a kind of economic and practical
Detection method, and there is ease for use and applicability, and this method is simple and fast, economic and practical, detection efficiency is high.
Based on the same inventive concept, a kind of device of measurement gray cast iron inside graphite attribute is additionally provided.Due to this device
The principle solved the problems, such as is similar to a kind of aforementioned measurement gray cast iron inside method of graphite attribute, and therefore, the implementation of the device can
To realize that overlaps will not be repeated according to the specific steps of preceding method.
As shown in figure 3, measuring the structural representation of the device of graphite attribute inside gray cast iron for one of one embodiment
Figure.The device 10 of graphite attribute includes: that the first acquisition module 200, second obtains module 400 and compares inside the measurement gray cast iron
With measurement module 600.
Wherein, the first acquisition module 200 is used to obtain the attenuation coefficient of the gray cast iron material based on standard sample；Second obtains
Modulus block 400 obtains multiple a variety of data for gray cast iron to be measured for detecting to gray cast iron to be measured；It compares and measures
Module 600 is used to be compared according to a variety of data detected with the attenuation coefficient of the gray cast iron material of standard sample, completes
The measurement of graphite attribute inside gray cast iron.
The device of graphite attribute, obtains module by first first and obtains inside a kind of measurement gray cast iron provided by the invention
The attenuation coefficient of gray cast iron material based on standard sample；Gray cast iron to be measured is detected by the second acquisition module again, is obtained
Take multiple a variety of data for gray cast iron to be measured；Eventually by comparison with measurement module according to a variety of data and mark detected
The attenuation coefficient of the gray cast iron material of quasi- sample is compared, and completes the measurement of graphite attribute inside gray cast iron.The device solves
Graphite morphology inside gray cast iron material, size and distribution feelings cannot be shown for fabricated part and large-scale workpiece in the prior art
Condition, and graphite morphology, size and distribution feelings inside the gray cast iron material of the fabricated part and large-scale workpiece detection for batch
Condition does not have the problem of agility and high efficiency, and completes lossless quickly to carry out gray cast iron material graphite length scale
Measurement, is remarkably improved live product detection efficiency in production testing, is a kind of economic and practical detection method, and have easy
With property and applicability, and this method is simple and fast, economic and practical, detection efficiency is high.
The embodiment of the invention also provides a kind of computer readable storage medium, stored on the computer readable storage medium
There is computer program, which is executed by processor in Fig. 1.
The embodiment of the invention also provides a kind of computer program products comprising instruction.When the computer program product exists
When being run on computer, so that the method that computer executes above-mentioned Fig. 1.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The basic principle of the disclosure is described in conjunction with specific embodiments above, however, it is desirable to, it is noted that in the disclosure
The advantages of referring to, advantage, effect etc. are only exemplary rather than limitation, must not believe that these advantages, advantage, effect etc. are the disclosure
Each embodiment is prerequisite.In addition, detail disclosed above is merely to exemplary effect and the work being easy to understand
With, rather than limit, it is that must be realized using above-mentioned concrete details that above-mentioned details, which is not intended to limit the disclosure,.
Above description is had been presented for for purposes of illustration and description.In addition, this description is not intended to the reality of the disclosure
It applies example and is restricted to form disclosed herein.Although already discussed above multiple exemplary aspects and embodiment, this field skill
Its certain modifications, modification, change, addition and sub-portfolio will be recognized in art personnel.
Claims (10)
1. a kind of method of graphite attribute inside measurement gray cast iron, which comprises the following steps:
Obtain the attenuation coefficient of the gray cast iron material based on standard sample；
Gray cast iron to be measured is detected, multiple a variety of data for the gray cast iron to be measured are obtained；
It is compared according to a variety of data detected with the attenuation coefficient of the gray cast iron material of standard sample,
Complete the measurement of graphite attribute inside the gray cast iron.
2. the method for graphite attribute inside measurement gray cast iron according to claim 1, which is characterized in that the acquisition is based on
The attenuation coefficient of the gray cast iron material of standard sample includes: directly to be visited by the way that at least one supersonic detector is arranged at least one
Head receives the attenuation coefficient of the gray cast iron material of the standard sample.
3. the method for graphite attribute inside measurement gray cast iron according to claim 1, which is characterized in that the acquisition is based on
The attenuation coefficient of the gray cast iron material of standard sample includes:
The gray cast iron material of default graphite length scale is defined as to the gray cast iron material of the standard sample；
Institute of the gray cast iron material to ultrasonic wave of the standard sample is measured and calculated according to ultrasonic wave A type pulse reflection method
State attenuation coefficient, wherein the thickness of workpiece of the gray cast iron material based on the standard sample is t, ultrasonic attenuation x
Decibel, the attenuation coefficient of the gray cast iron material based on the standard sample are defined as k0, k0=x/t.
4. the method for graphite attribute inside measurement gray cast iron according to claim 1, which is characterized in that described according to detection
To a variety of data be compared with the attenuation coefficient of the gray cast iron material of standard sample, complete it is described ash casting
The measurement of graphite attribute includes: inside iron
Attenuation coefficient in multiple a variety of data for the gray cast iron to be measured of acquisition is extracted and is defined as
k；
It will decline described in the gray cast iron material of the attenuation coefficient for being directed to the gray cast iron to be measured with the standard sample
Subtract coefficient and carry out difference calculating ratio pair, completes the measurement of graphite attribute inside the gray cast iron.
5. the method for graphite attribute inside measurement gray cast iron according to claim 4, which is characterized in that described to be directed to institute
The attenuation coefficient progress for stating the attenuation coefficient of gray cast iron to be measured and the gray cast iron material of the standard sample is poor
It is worth calculating ratio pair, the measurement for completing graphite attribute inside the gray cast iron includes:
It declines when being directed to described in the gray cast iron material of the attenuation coefficient of the gray cast iron to be measured with the standard sample
Subtract coefficient and carry out difference calculating, difference then determines that graphite length is up to standard inside the gray cast iron to be measured less than 0.
6. the method for graphite attribute inside measurement gray cast iron according to claim 4, which is characterized in that described to be directed to institute
The attenuation coefficient progress for stating the attenuation coefficient of gray cast iron to be measured and the gray cast iron material of the standard sample is poor
It is worth calculating ratio pair, the measurement for completing graphite attribute inside the gray cast iron includes:
It declines when being directed to described in the gray cast iron material of the attenuation coefficient of the gray cast iron to be measured with the standard sample
Subtract coefficient and carry out difference calculating, difference is greater than 0, then determines that graphite length is below standard inside the gray cast iron to be measured.
7. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is held by processor
The step of any one of claim 1-6 the method is realized when row.
8. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that the processor realizes side described in any one of described claim 1-6 when executing described program
The step of method.
9. the device of graphite attribute inside a kind of measurement gray cast iron, which is characterized in that described device includes:
First obtains module, for obtaining the attenuation coefficient of the gray cast iron material based on standard sample；
Second obtains module, for detecting to gray cast iron to be measured, obtains multiple a variety of numbers for the gray cast iron to be measured
According to；
Compare with measurement module, for the institute according to the gray cast iron material of a variety of data and standard sample detected
It states attenuation coefficient to be compared, completes the measurement of graphite attribute inside the gray cast iron.
10. the device of graphite attribute inside measurement gray cast iron according to claim 9, which is characterized in that described first obtains
Modulus block is made of at least one supersonic detector and at least one normal probe.
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