CN105300859A - Device for rapidly measuring grain size and magnetic domain wall width of oriented silicon steel sheet - Google Patents
Device for rapidly measuring grain size and magnetic domain wall width of oriented silicon steel sheet Download PDFInfo
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- CN105300859A CN105300859A CN201510887354.7A CN201510887354A CN105300859A CN 105300859 A CN105300859 A CN 105300859A CN 201510887354 A CN201510887354 A CN 201510887354A CN 105300859 A CN105300859 A CN 105300859A
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Abstract
The invention discloses a device for rapidly measuring the grain size and magnetic domain wall width of an oriented silicon steel sheet. The device comprises a sample platform and a developing component, wherein the developing component comprises a display window and a contact layer; the display window is a transparent glass plate or a transparent hard plastic plate; a liquid storage cavity used for containing a developing suspension liquid is formed between the display window and the contact layer; the display window is provided with a suspension liquid injection hole used for injecting the developing suspension liquid into the liquid storage cavity and a liquid storage cavity closed hole used for balancing the internal pressure of the liquid storage cavity; the suspension liquid injection hole and the liquid storage cavity closed hole can be opened or closed as needed; a magnet yoke is arranged in the sample platform and is provided with a magnetizing winding; after being electrified, the magnetizing winding is capable of magnetizing the oriented silicon steel sheet put on the sample platform. By virtue of adopting the powder pattern method theory, the device is capable of rapidly measuring the grain size and magnetic domain wall width of the oriented silicon steel sheet.
Description
Technical field
The present invention relates to a kind of grain-oriented Si steel sheet analysis and detection device, refer to a kind of device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width especially.
Background technology
Silicon steel is a kind of very important functional form metal material, especially orientation silicon steel, always high and famous with its complicated process of preparation, technical requirement.The loss of orientation silicon steel is one of its most crucial assessment of performance foundation.
Found by research for a long time, the loss of orientation silicon steel and its crystallite dimension, neticdomain wall width have close contacting.Crystal grain is too small, and grain boundary is just increased relatively, and in remagnetization process, magnetic hysteresis loss can obviously increase, and crystallite dimension is excessive, then magnetic domain domain wall motion speed increases, and directly causes eddy current loss to increase.How fast, accurately grain size and magnetic domain domain wall width, as two important indicators of orientation silicon steel, detect grain size and magnetic domain domain wall width becomes a research topic be of practical significance.
Because orientation silicon steel grain size is comparatively large, generally adopt macroscopic measurement, the artificial number of dies read in regular length.Powder pattern method and magneto-optical method are often adopted for observation of magnetic domain, by means of metaloscope or polarized light source, by the cup scale metered magnetic domain domain wall width on eyepiece.But not only to observe direction of magnetization in actual use, have some wedge-like farmland, 90 degree of closure domains etc. in magnetic domain, need to observe its angle.
Wei Yimin etc. propose a kind of employing γ Fe in " the dynamic Domain Observation of coating siliconized plate " (Wuhan Iron and Steel Plant technology 1985.5.28-31)
2o
3magnetic carries out the simple experimental device of Domain Observation.The structure of this device as shown in Figure 1, survey around magnetizing coil 21 at two of a fixed frame 20, and sample is positioned in the middle watch window 22 opened, in watch window 22, place mat and sample to be seen, then smear the γ Fe containing lubricant at sample surfaces
2o
3magnetic suspension, then after being energized to magnetizing coil 21, the situation of change of observing suspending liquid completes experiment.
Said apparatus mainly contains the shortcoming of the following aspects: 1. sample size is restricted, can only observe less sample, and the change of the crystal grain of orientation silicon steel is more complicated, and small sample is difficult to the actual conditions characterizing large scale sample; 2. observation suspension directly contacts with sample, can not reuse, comparatively waste after using, and repeated configuration suspending liquid time and effort consuming; 3. owing to being the neutral magnetic field formed by bilateral winding, the magnetic field conditions in center is comparatively complicated.
Summary of the invention
The object of the present invention is to provide a kind of device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width, grain size and the neticdomain wall width of siliconized plate can be measured easily and quickly.
For achieving the above object, the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width designed by the present invention, comprise sample bench, profiling parts, described profiling parts comprise display window and contact layer, described display window is transparent glass plate or transparent hard plastic board, form the liquid storage chamber for filling profiling suspending liquid between described display window and contact layer, described liquid storage chamber is airtight thin layer cavity.Described display window is provided with the suspending liquid filling orifice for filling profiling suspending liquid in liquid storage chamber, and hold one's breath hole in the liquid storage chamber for balancing liquid storage cavity pressure, being held one's breath in hole in described suspending liquid filling orifice and liquid storage chamber can closure or openness as required; Described liquid storage chamber hold one's breath hole can inject profiling suspending liquid time balance liquid storage chamber in pressure, facilitate the injection of profiling suspending liquid, this injection process can adopt conventional syringe; Described suspending liquid filling orifice and liquid storage chamber hole of holding one's breath need not strictly be distinguished in use, can select one of them when injecting profiling suspending liquid, and another is connected with outside atmosphere as hole of holding one's breath, liquid storage chamber.Be provided with yoke in described sample bench, described yoke be provided with magnetization winding, the orientation silicon steel sample magnetization that can will be positioned on sample bench after described magnetization winding energising; The shape of yoke must ensure that yoke and print to be measured can form closed magnetic circuit in the process of magnetization sample, avoid leakage field on the impact of measuring.
During use, first get out profiling suspending liquid, the profiling powder in suspending liquid requires easy magnetization, remanent magnetism is little and be insoluble to corresponding suspending liquid, as Fe
3o
4magnetic; Open suspending liquid filling orifice and liquid storage chamber to hold one's breath hole, injected by profiling suspending liquid in described liquid storage chamber, hold one's breath hole in closed suspending liquid filling orifice and liquid storage chamber subsequently, shake profiling parts and profiling suspending liquid is evenly distributed in liquid storage chamber; During measurement, orientation silicon steel sample is placed on testing table, more profiling parts are placed on orientation silicon steel sample, by additional power source, electric current is applied to magnetization winding, realize the magnetization to yoke, magnetic flux is passed on orientation silicon steel sample, makes it be magnetized along rolling direction; After orientation silicon steel sample is magnetized; profiling powder can along crystal boundary edge assemble make magnetic domain and crystal grain profiling; process by importing computing machine after taking pictures; or adopt ruler, protractor etc. to carry out all angles measurement, grain size and the neticdomain wall width of tested grain-oriented Si steel sheet can be obtained further across simple computation.
Preferably, described contact layer is wear-resisting flexible plastic film, and its surrounding is bonded in the bottom of display window, leaves certain space as liquid storage chamber between described flexible plastic film and display window; Because the surface of orientation silicon steel sample is not definitely smooth, adopt wear-resisting flexible plastic film as contact layer, profiling suspending liquid can be made to be fitted in the surface of sample better, and profiling better effects if, measurement result is more accurate.Because when measuring, contact layer directly contacts with orientation silicon steel sample, and sample itself exists certain burr or sharp corner, therefore, wear-resisting flexible plastic film is adopted, can reduce contact layer in measuring process by sample scratch may, improve the serviceable life of profiling parts.
Preferably, described suspending liquid filling orifice and liquid storage chamber hold one's breath hole adopt the rubber stopper corresponding to its aperture carry out airtight.By extracting rubber stopper to open aperture; Rubber stopper can make aperture close beyond the Great Wall.Also can adopt at aperture internal fixtion one section of flexible pipe, by clip closure or openness aperture.
Preferably, described yoke is U-shaped structure, is made and fixedly form by orientation silicon steel lamination; Described magnetization winding is wrapped in the bottom of yoke; During measurement, the both upper ends thereof of described yoke contacts with the bottom surface of measured orientation silicon steel sample, contacts more abundant, magnetization and profiling effect better.
Preferably, the both sides of described display window are respectively arranged with the handle being convenient to mobile profiling parts.
Alternatively, described display window is printed with coordinate grid.Coordinate grid is generally arranged on the front of display window, reduces suspending liquid to the wearing and tearing of mesh lines.The coordinate acting as location survey point of coordinate grid, when needs calculate with when rolling to angle, also calculates the angle of each magnetic domain by coordinate system.
Alternatively, the outside of described display window longitudinally with is laterally respectively arranged with longitudinal scale and horizontal scale.Scale mark is generally arranged on the front of display window, to reduce the wearing and tearing of profiling suspending liquid to mesh lines.Longitudinal scale is identical with aforementioned coordinate grid with horizontal scale effect.Usually ruler, protractor is needed to carry out subsidiary.
Alternatively, described display window is also provided with soft cloth tape measure, soft cloth tape measure is more flexible when measuring, and is convenient for measuring crystal grain and the magnetic domain of different directions.
Alternatively, this device is provided with movable scale, the two ends of described movable scale are hinged with first connecting rod respectively, the end of described first connecting rod is hinged with second connecting rod, the end of described second connecting rod is hinged with slip clamp, the top of described sample bench is provided with two movable scale slide rails, and the slip clamp at the two ends of described movable scale is connected in movable scale slide rail respectively slidably.Movable scale by scale slide rail transverse shifting, is vertically moved by first connecting rod, second connecting rod and adjusts angle, can measure the crystal grain of center and magnetic domain neatly
Preferably, the thickness in described liquid storage chamber is 1mm ~ 3mm.
The invention has the beneficial effects as follows: this device adopts powder pattern method principle, can measure grain-oriented Si steel sheet grain size and neticdomain wall width fast and accurately.By the magnetization to yoke, magnetic flux is passed to orientation silicon steel sample, magnetization more fast, evenly; Profiling suspending liquid is sealed in liquid storage chamber, and effectively prevent the mutual pollution of profiling suspending liquid and orientation silicon steel sample, therefore profiling suspending liquid can reuse; After measurement terminates, orientation silicon steel sample is without the need to cleaning and recoverable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device measuring grain-oriented Si steel sheet grain size and neticdomain wall width in background technology.
The structural representation of the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width of Fig. 2 designed by the present invention.
Fig. 3 is for sectional structure schematic diagram that the device of Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width intercepts along A-A direction in Fig. 2.
Fig. 4 is the perspective view of yoke in Fig. 2.
Wherein: profiling parts 1, yoke 2, movable scale 3, movable scale slide rail 4, soft cloth tape measure 5, suspending liquid filling orifice 6, liquid storage chamber hold one's breath hole 7, liquid storage chamber 8, handle 9, longitudinal scale 10, horizontal scale 11, display window 12, contact layer 13, magnetization winding 14, slip clamp 15, orientation silicon steel sample 16, sample bench 17, first connecting rod 18, second connecting rod 19, fixed frame 20, magnetizing coil 21, watch window 22
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Be illustrated in figure 1 the grain size of measurement grain-oriented Si steel sheet of the prior art and the device of neticdomain wall width, its structure is explained in detail in background technology part, repeats no more in this.
As shown in figs. 2 to 4, the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width designed by the present invention, this device mainly comprises profiling parts 1 and the separate part of sample bench 17 two, and profiling parts 1 comprise display window 12 and contact layer 13.Display window 12 is rectangular clear hard plastic plate, and its both sides are respectively arranged with a handles 9.Contact layer 13 is wear-resisting flexible plastic film, and its surrounding is bonded in the bottom of display window 12.About 1mm space is left as liquid storage chamber 8 between contact layer 13 and display window 12.Display window 12 is provided with the suspending liquid filling orifice 6 for filling profiling suspending liquid in liquid storage chamber 8, and hold one's breath hole 7 in the liquid storage chamber for balancing pressure in liquid storage chamber 8, suspending liquid filling orifice 6 and liquid storage chamber hole 7 of holding one's breath adopts the rubber stopper corresponding to its aperture to carry out airtight.
Be provided with yoke 2 in sample bench 17, yoke 2 is U-shaped structure, is made and fixedly form by orientation silicon steel lamination.Magnetization winding 14 is wrapped in the bottom of yoke 2.During measurement, orientation silicon steel sample 16 is placed on the upper opening position of yoke 2, a magnetic loop be jointly made up of yoke 2 and orientation silicon steel sample 16 can be formed after yoke 2 is magnetized, thus be reached for the object that orientation silicon steel sample 16 provides good magnetization environment.
The outside of display window 12 longitudinally with is laterally respectively arranged with longitudinal scale 10 and horizontal scale 11.The edge of display window 12 is provided with soft cloth tape measure 5.Sample bench 17 is provided with movable scale 3, the two ends of movable scale 3 are hinged with first connecting rod 18 respectively, the end of two first connecting rods 18 is hinged with second connecting rod 19 respectively, the end of two second connecting rods 19 is hinged with " ten " font slip clamp 15 respectively, the top of sample bench 17 is provided with two movable scale slide rails 4, movable scale slide rail 4 is " ten " font chute matched with slip clamp 15, and two slip clamps 15 are connected in movable scale slide rail 4 respectively slidably.
Adopt the step of this measurement device grain-oriented Si steel sheet grain size and neticdomain wall width as follows:
1) configure profiling suspending liquid, in this example, adopt Fe
3o
4suspending liquid.By a certain proportion of FeCl
2, FeCl
3and NaOH solution mixing, generate Fe under proper temperature
3o
4, and by Fe
3o
4leach.
2) by Fe
3o
4suspending liquid injects in the liquid storage chamber 8 under profiling parts 1, notes adjusting liquid storage cavity pressure by hole 7 of holding one's breath, liquid storage chamber, and ensures Fe
3o
4uniform suspension disperses.
3) orientation silicon steel sample 16 is cut into the silver that length and width are all greater than 120mm, required the sample surfaces of preparation smooth non-wrinkle, burr can not be excessive.
4) be positioned on sample bench 17 by orientation silicon steel sample 16, the rolling direction of orientation silicon steel sample 16 should be consistent with longitudinal scale 10 length direction, makes the direction of its easy magnetization consistent with the magnetic direction of generation.Orientation silicon steel sample 16 is sufficiently large, and has good contact with the two ends of yoke 2.
5) by handle 9, profiling parts 1 are positioned over the surface of orientation silicon steel sample 16.
6) apply electric current by external dc power supply to magnetization winding 14, realize the magnetization to yoke 2, magnetic flux is passed to orientation silicon steel sample 16 by yoke 2, makes it be magnetized along rolling direction.
7) after orientation silicon steel sample 16 is magnetized, the Fe in profiling suspending liquid
3o
4magnetic domain after being magnetized according to sample and crystal grain situation are magnetized, and make Fe
3o
4assemble along crystal boundary edge.Size, the position of each crystal grain can be determined by longitudinal scale 10, horizontal scale 11, also carry out all angles measurement by soft cloth tape measure 5, movable scale 3 pairs of magnetic domains and crystal grain, also can directly take protractor directly to measure angle if desired.Crystallite dimension computing formula is that D=L/N, D represent crystallite dimension, and L represents lateral length, and N represents number of dies.For ensureing the accuracy measured, during measurement, N is generally not less than 10.
8) as observed Fe before measuring
3o
4there is aggregating state in suspending liquid, the suspending liquid in liquid storage chamber can be extracted out, re-use supersonic oscillations, will occur the Fe of aggregating state after after sealing
3o
4can reuse after suspending liquid dispersion.
Claims (10)
1., for a device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width, comprise profiling parts (1), sample bench (17), it is characterized in that:
Described profiling parts (1) comprise display window (12) and contact layer (13), described display window (12) is transparent glass plate or transparent hard plastic board, form the liquid storage chamber (8) for filling profiling suspending liquid between described display window (12) and contact layer (13), described liquid storage chamber (8) is airtight thin layer cavity; Described display window (12) is provided with the suspending liquid filling orifice (6) for filling profiling suspending liquid in liquid storage chamber (8), and hold one's breath hole (7) in the liquid storage chamber for balancing liquid storage chamber (8) interior pressure, being held one's breath in hole (7) in described suspending liquid filling orifice (6) and liquid storage chamber can closure or openness as required;
Yoke (2) is provided with in described sample bench, described yoke (2) is provided with magnetization winding (14), when orientation silicon steel sample (16) magnetization that can will be positioned on sample bench after magnetization winding (14) energising.
2. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to claim 1, it is characterized in that: described contact layer (13) is wear-resisting flexible plastic film, its surrounding is bonded in the bottom of display window (12), leaves certain space as liquid storage chamber (8) between described flexible plastic film and display window (12).
3. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to claim 1, is characterized in that: described suspending liquid filling orifice (6) and liquid storage chamber hole (7) of holding one's breath adopts the rubber stopper corresponding to its aperture to carry out airtight.
4. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to any one of claims 1 to 3, is characterized in that: described yoke (2) is U-shaped structure, is made and fixedly form by orientation silicon steel lamination; Described magnetization winding (14) is wrapped in the bottom of yoke (2); During measurement, the both upper ends thereof of described yoke (2) contacts with the bottom surface of measured orientation silicon steel sample (16).
5. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to any one of claims 1 to 3, is characterized in that: the both sides of described display window (12) are respectively arranged with the handle (9) being convenient to mobile profiling parts (1).
6. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to any one of claims 1 to 3, is characterized in that: (12) are printed with coordinate grid to described display window.
7. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to any one of claims 1 to 3, is characterized in that: the outside of described display window (12) longitudinally with is laterally respectively arranged with longitudinal scale (10) and horizontal scale (11).
8. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to claim 7, is characterized in that: described display window (12) is also provided with soft cloth tape measure (5).
9. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to claim 7, it is characterized in that: also comprise movable scale (3), the two ends of described movable scale (3) are hinged with first connecting rod (18) respectively, the end of described first connecting rod (18) is hinged with second connecting rod (19), the end of described second connecting rod (19) is hinged with slip clamp (15), the top of described sample bench (17) is provided with two movable scale slide rails (4), the slip clamp (15) at the two ends of described movable scale (3) is connected in movable scale slide rail (4) respectively slidably.
10. the device for Quick Measurement grain-oriented Si steel sheet grain size and neticdomain wall width according to any one of claims 1 to 3, is characterized in that: the thickness of described liquid storage chamber (8) is 1mm ~ 3mm.
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| CN108982336A (en) * | 2018-08-13 | 2018-12-11 | 武汉钢铁有限公司 | Realize orientation silicon steel crystal grain and the system and method that magnetic domain is observed simultaneously |
| CN112410525A (en) * | 2020-11-18 | 2021-02-26 | 无锡普天铁心股份有限公司 | Low-iron-loss oriented silicon steel magnetic domain refining device |
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