CN106596708A - Method and device for quickly detecting carbonitriding network structure on surface of steel part - Google Patents
Method and device for quickly detecting carbonitriding network structure on surface of steel part Download PDFInfo
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- CN106596708A CN106596708A CN201611124815.6A CN201611124815A CN106596708A CN 106596708 A CN106596708 A CN 106596708A CN 201611124815 A CN201611124815 A CN 201611124815A CN 106596708 A CN106596708 A CN 106596708A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
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- General Health & Medical Sciences (AREA)
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a method and device for quickly detecting a carbonitriding network structure on the surface of a steel part. A complete loop is formed between a magnetic circuit iron core and a sample by ingeniously utilizing an electromagnetic induction principle, a magnetic field generated by a transmitting coil is made to pass the magnetic circuit iron core and the surface layer of the part and then pass a receiving coil to generate an induction current by adopting an alternating current with the specific potential current size and frequency, the induction current is amplified and then displayed with a gauge outfit, and by comparing the induction current with a standard current, the steel part sample containing the carbonitriding network structure can be conveniently and quickly detected. In this way, complex equipment does not need to be used, no destruction can be caused to the steel part, detection can be conducted in the production field, and an important role is achieved for improving the product quality and the production efficiency. The method and device are simple, easy to operate, low in cost and good in using effect.
Description
Technical field
The present invention relates to detection technique field, especially a kind of side of quick detection steel piece surface carbo-nitriding reticular tissue
Method and device.
Background technology
It is well known that metal material will be used in industrial products in large quantities, and the iron and steel parts of many are under arms
During due to specific performance requirement, its surface must carry out reinforcing heat treatment, and carbo-nitriding is exactly one kind therein, and it is
Activated nitrogen atom and nitrogen-atoms are penetrated into into steel surface, so as to the case hardness, wearability, corrosion stability and the resisting fatigue that improve part are strong
Degree, does not allow netted compound tissue (as shown in Figure 2) occur in the diffusion layer organization after usual carbo-nitriding, it can make infiltration layer
Plasticity is reduced, fragility increase, and the fatigue strength to carbo-nitriding workpiece is adversely affected, therefore, quickly and easily detect
Reticular tissue formulates technique to correct, and the production efficiency for improving the quality layer and product of steel part all has highly important reality
Meaning.
The content of the invention
The purpose of the present invention is：A kind of method and device of quick detection steel piece surface carbo-nitriding reticular tissue is provided,
Whether it can quickly detect steel piece surface containing carbo-nitriding reticular tissue, and method is simple, with low cost, existing to overcome
The deficiency of technology.
What the present invention was realized in：The method of quick detection steel piece surface carbo-nitriding reticular tissue, including following step
Suddenly：
1) standard specimen of carbo-nitriding reticular tissue is not had to constitute a complete loop with magnetic circuit iron core by one piece, and
One group of transmitting coil and receiving coil are respectively provided with magnetic circuit iron core, being powered to transmitting coil makes which produce magnetic field, produced
Magnetic field receiving coil is then passed through by standard specimen and magnetic circuit iron core, make a corresponding faradic current is produced in receiving coil
I0, by faradic current I0After being amplified by alternative current amplifier, then reading data are directly displayed from exchange gauge outfit, as mark
Quasi- electric current I1；
2) by sample to be tested adopt step 1) method operated, obtain measurement electric current I2；
3) compare measurement electric current I2With normalized current I1If measuring electric current I2With normalized current I1It is identical, then it represents that to be tested
The detection surface of sample does not have carbo-nitriding reticular tissue, if measurement electric current I2Less than normalized current I1More than 15%, then explanation is treated
There is carbo-nitriding reticular tissue in the detection surface of test specimens；
Step 1) and step 2) described in transmitting coil be powered electric current be alternating current, its potential be 8-12V, electric current
Size is 1-1.5A, and its frequency is 2000-2500HZ.
The device of quick detection steel piece surface carbo-nitriding reticular tissue, including magnetic circuit iron core, described magnetic circuit iron core is
Reverse U shape structure, is wound with transmitting coil in the side of magnetic circuit iron core, and transmitting coil is connected with power supply；In the another of magnetic circuit iron core
Side is wound with receiving coil, and receiving coil is connected with gauge outfit by alternative current amplifier.
Described power supply is variable frequency power source.
Transmitting coil is identical with the number of turn of receiving coil.
The present invention principle be：If there is carbo-nitriding reticular tissue, the alternation that transmitting coil is produced in sample surfaces
Magnetic field by during the sample because its carbo-nitriding reticular tissue reduces magnetic flux to the obstruction in magnetic field, and then in receiving coil
The induced potential of generation also reduces therewith, so the faradic current I shown in gauge outfit2Again smaller than the electric current I of standard specimen1, row
Go out and detect interference that may be present, then regard as the presence of unacceptable defect less than more than 15%.
As a result of above-mentioned technical proposal, compared with prior art, the present invention dexterously make use of the original of electromagnetic induction
Reason, makes a complete loop is constituted between magnetic circuit iron core and sample, using certain electrical potential size of current and the alternating current of frequency
Make the magnetic field that transmitting coil is produced in the received coil generation faradic current again by magnetic circuit iron core and part top layer after, this is felt
Induced current is shown with gauge outfit after amplifying, by contrasting with normalized current, you can conveniently and efficiently detected containing carbon nitrogen altogether
The steel part sample of reticular tissue is oozed, such mode is without using complicated equipment, nor steel part can be damaged,
Can be detected, be played an important role to improve product quality and production efficiency in production scene.Simple, cost of the invention
Cheap, using effect is good.
Description of the drawings
Structural representation of the accompanying drawing 1 for the present invention；
Accompanying drawing 2 is organized for the net carbide of steel piece surface.
Specific embodiment
Embodiments of the invention：The method of quick detection steel piece surface carbo-nitriding reticular tissue, comprises the steps：
1) standard specimen of carbo-nitriding reticular tissue is not had to constitute a complete loop with magnetic circuit iron core by one piece, and
One group of transmitting coil and receiving coil are respectively provided with magnetic circuit iron core, being powered to transmitting coil makes which produce magnetic field, produced
Magnetic field receiving coil is then passed through by standard specimen and magnetic circuit iron core, make a corresponding faradic current is produced in receiving coil
I0, by faradic current I0After being amplified by alternative current amplifier, then reading data are directly displayed from exchange gauge outfit, as mark
Quasi- electric current I1；
2) by sample to be tested adopt step 1) method operated, obtain measurement electric current I2；
3) compare measurement electric current I2With normalized current I1If measuring electric current I2With normalized current I1It is identical, then it represents that to be tested
The detection surface of sample does not have carbo-nitriding reticular tissue, if measurement electric current I2Less than normalized current I1, then illustrate the inspection of sample to be tested
Survey surface and there is carbo-nitriding reticular tissue；
Step 1) and step 2) described in be alternating current to the electric current that transmitting coil is powered, its potential is that 12V, electric current are big
It is little for 1.2A, its frequency is 2000HZ.
The device of quick detection steel piece surface carbo-nitriding reticular tissue, including magnetic circuit iron core 1, described magnetic circuit iron core 1
For reverse U shape structure, transmitting coil 2 is wound with the side of magnetic circuit iron core 1, transmitting coil 2 is connected with variable frequency power source 3；In magnetic circuit
The opposite side of iron core 1 is wound with receiving coil 4, and receiving coil 4 is connected with gauge outfit 6 by alternative current amplifier 5；Transmitting coil 2 with connect
The number of turn of take-up circle 4 is identical.
During use, standard specimen or sample to be tested are placed on into the position of detection zone 7, make the test surfaces 8 of sample with
The bottom good contact of magnetic circuit iron core 1.
Inventor adopts such scheme, and the cold-working mould to pacifying the production in 2015 of big forge plant is detected.
From in January, 2015-December, the cold-working mould from the same batch production of every month is one group to inventor, Zong Gongqu
12 groups of sample, per group samples 5.Detected using said method, the normalized current I for obtaining first1For 0.78A, and to sample
Testing result in, the measurement electric current I of 1-11 month all samples2With normalized current I1Difference is less than 3%；But, December
Sample detection result, its detection electric current I2Size be respectively 0.47A, 0.49A, 0.51A, 0.51A and 0.52A, its all sample
The detection electric current I of product2Be above standard electric current I1More than 15%, then all detection samples are detected through optical microscope, knot
Fruit finds that the sample of the 1-11 months is entirely absent carbo-nitriding reticular tissue, and the 5 of December samples have carbo-nitriding net
Shape is organized, and this is completely the same with the test result of the present invention.
Claims (4)
1. a kind of method of quick detection steel piece surface carbo-nitriding reticular tissue, it is characterised in that：Comprise the steps：
1) standard specimen of carbo-nitriding reticular tissue is not had to constitute a complete loop with magnetic circuit iron core by one piece, and in magnetic
One group of transmitting coil and receiving coil are respectively provided with the iron core of road, being powered to transmitting coil makes which produce magnetic field, produced magnetic
Field is then passed through receiving coil by standard specimen and magnetic circuit iron core, produces a corresponding faradic current I in making receiving coil0,
By faradic current I0After being amplified by alternative current amplifier, then reading data, as standard are directly displayed from exchange gauge outfit
Electric current I1；
2) by sample to be tested adopt step 1) method operated, obtain measurement electric current I2；
3) compare measurement electric current I2With normalized current I1If measuring electric current I2With normalized current I1It is identical, then it represents that sample to be tested
Detection surface does not have carbo-nitriding reticular tissue, if measurement electric current I2Less than normalized current I1More than 15%, then illustrate to be tested
There is carbo-nitriding reticular tissue in the detection surface of sample；
Step 1) and step 2) described in transmitting coil be powered electric current be alternating current, its potential be 8-12V, size of current
For 1-1.5A, its frequency is 2000-2500HZ.
2. a kind of device for realizing the method for claim 1, including magnetic circuit iron core (1), it is characterised in that：Described magnetic
Road iron core (1) is reverse U shape structure, is wound with transmitting coil (2), transmitting coil (2) and power supply in the side of magnetic circuit iron core (1)
(3) connect；Receiving coil (4) is wound with the opposite side of magnetic circuit iron core (1), receiving coil (4) is by alternative current amplifier (5) and table
Head (6) connection.
3. device according to claim 2, it is characterised in that：Described power supply (3) is variable frequency power source.
4. device according to claim 2, it is characterised in that：Transmitting coil (2) is identical with the number of turn of receiving coil (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611124815.6A CN106596708A (en) | 2016-12-08 | 2016-12-08 | Method and device for quickly detecting carbonitriding network structure on surface of steel part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611124815.6A CN106596708A (en) | 2016-12-08 | 2016-12-08 | Method and device for quickly detecting carbonitriding network structure on surface of steel part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106596708A true CN106596708A (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611124815.6A Withdrawn CN106596708A (en) | 2016-12-08 | 2016-12-08 | Method and device for quickly detecting carbonitriding network structure on surface of steel part |
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| CN (1) | CN106596708A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02162276A (en) * | 1989-04-28 | 1990-06-21 | Nkk Corp | Method and apparatus for magnetic measuring |
| CN102422153A (en) * | 2009-02-25 | 2012-04-18 | 住友金属工业株式会社 | Carburization detection method |
| CN102435666A (en) * | 2011-10-11 | 2012-05-02 | 南昌航空大学 | Method for evaluating stress concentration and fatigue damage based on feature permeability detection |
| CN103238064A (en) * | 2010-10-26 | 2013-08-07 | 高周波热錬株式会社 | Quenching depth measuring method and quenching depth measuring device |
-
2016
- 2016-12-08 CN CN201611124815.6A patent/CN106596708A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02162276A (en) * | 1989-04-28 | 1990-06-21 | Nkk Corp | Method and apparatus for magnetic measuring |
| CN102422153A (en) * | 2009-02-25 | 2012-04-18 | 住友金属工业株式会社 | Carburization detection method |
| CN103238064A (en) * | 2010-10-26 | 2013-08-07 | 高周波热錬株式会社 | Quenching depth measuring method and quenching depth measuring device |
| CN102435666A (en) * | 2011-10-11 | 2012-05-02 | 南昌航空大学 | Method for evaluating stress concentration and fatigue damage based on feature permeability detection |
Non-Patent Citations (2)
| Title |
|---|
| 杭亮 等: "基于ARM7的硅钢片铁损测试仪", 《机电工程》 * |
| 陈爱霞 等: "磁通量的变化对线圈中感应电流的影响", 《科技传播》 * |
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