CN204632490U - A kind of core iron for magnetic device - Google Patents
A kind of core iron for magnetic device Download PDFInfo
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- CN204632490U CN204632490U CN201520175890.XU CN201520175890U CN204632490U CN 204632490 U CN204632490 U CN 204632490U CN 201520175890 U CN201520175890 U CN 201520175890U CN 204632490 U CN204632490 U CN 204632490U
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Abstract
The utility model discloses a kind of core iron for magnetic device.This core iron not only comprises axle, and to be detoured the non-crystaline amorphous metal body formed on axle and through annealing in process by iron-based amorphous alloy ribbon material, also comprising for encapsulating this Fe-based amorphous alloy, making the encapsulated layer that itself and external environment are isolated.This core iron not only has excellent magnetic property, and can effectively avoid non-crystaline amorphous metal directly exposed on surface, slag, fracture is fallen through frictional impact, and the problem such as the stress sensitivity directly contacting and exist with external environment, other construction units is large, corrosion resistance is poor.
Description
Technical field
The utility model relates to a kind of core iron for magnetic devices such as electromagnet, electromagnetically operated valve, relay, electromagnetic lifters.
Background technology
The development of modern power electronics technology, the progress of active device, the volume and weight of electronic product greatly reduces, and has promoted to comprise the electronic devices and components of electromagnet, electromagnetically operated valve, relay and electromagnetic lifter to light, thin, little future development.Meanwhile, the national energy-saving reduction of discharging enforcement of policy and the trend of " low-carbon economy " have also promoted electromagnet, electromagnetically operated valve, relay and electromagnetic lifter to low energy consumption environmental protection future development.Therefore, the change to high frequency, low-loss, light weight, small size direction is also faced for the production technology of the core iron in the devices such as electromagnet, electromagnetically operated valve, relay, electromagnetic lifter.
In traditional handicraft, be soft-magnetic stainless steel, silicon steel, electrical pure iron etc. for the core iron material in the devices such as electromagnet, electromagnetically operated valve, relay, electromagnetic lifter.But these materials still need to be improved further as aspects such as its processing technology, magnetic property, energy consumptions during core iron material.
Such as, the pilot valve core iron of current electromagnetism four-way change-over valve adopts the preparation of stainless steel soft magnetism, but preparation process is complicated, time-consuming, effort and high energy consumption, stainless soft magnet performance is poor in addition, obtained four-way change-over valve exists that response speed is slow, exciting current large, the number of turn mainly with and the shortcoming such as energy consumption is high.Publication number is the preparation method that the patent of invention of CN 103805875A discloses a kind of stainless steel electromagnetically operated valve core iron, adopt high temperature sense melt furnace refining casting, more than 1200 DEG C forgings, turning processing and forming, more than 1000 DEG C normalizing heat treatments, and grind the processes such as processing, complex process, and high temperature forging and high temperature normalizing heat treatment process consume energy high.
Non-crystaline amorphous metal adopts fast solidification technology, the high-temperature molten steel of molten condition is ejected on the chill roll of High Rotation Speed, cool rapidly with the speed reaching 1,000,000 degree per second, make atom have little time to rearrange and be just solidified and the alloy material with longrange disorder microstructure formed.Compared with crystal alloy, non-crystaline amorphous metal all there occurs significant change in physical property, chemical property and mechanical performance etc.Fe-based amorphous alloy generally has the advantages such as high saturated magnetic induction, low-coercivity, high magnetic permeability and low-loss, meanwhile, due to non-crystaline amorphous metal manufacture and use procedure energy-conservation, be therefore called as " green material " and 21st century " dual-energy-saving " material.
Compared with soft-magnetic stainless steel, silicon steel, electrical pure iron etc., iron-base amorphous alloy material has following advantage:
(1) energy consumption is low: because amorphous metal soft magnetic material is higher than conventional crystal metal soft magnetic material resistivity, soft magnet performance is good, and iron-base amorphous alloy material is low as iron loss during core iron, is the 1/3-1/5 of ordinary silicon steel disc core iron;
(2) magnetic property is excellent: the magnetic permeability of Fe-based amorphous alloy can reach tens even hundred times of silicon steel, soft-magnetic stainless steel and electrical pure iron; (3) stability is high: the temperature stability of Fe-based amorphous alloy is high, aging stability is high, magnetic impact stability is high; In addition, the advantages such as Fe-based amorphous alloy also has that frequency adaptation scope, production technology are simple, environmental protection, price are low.Therefore, the combination property of the core iron prepared by Fe-based amorphous alloy is higher.
At present, prepare the method for core iron normally by amorphous alloy material: adopt Fe-based amorphous band coiling to form tubular, then carry out annealing in process, finally the practical structures of core iron is processed needed for device.
But, mainly there are the following problems for the non-crystaline amorphous metal core iron that the method obtains: (1) fragility is large: Fe-based amorphous band fragility after annealing in process is larger, in the method, Fe-based amorphous band after coiling, annealing carries out structure processing, then direct as core iron application in the devices, exist on the one hand due to the hidden danger such as brittle cracking, fracture in the course of processing, through friction, collision, there is core iron and fall the problems such as slag, cracking, fracture in another aspect in application process; (2) stress sensitive, corrosion resistance are poor: in the iron core utilizing the method obtained, iron-base amorphous alloy material is directly exposed on surface, directly contact with external environment, surrounding structure elements in application process, thus cause that the stress sensitivity of this core iron is large, corrosion resistance is poor.
Utility model content
For the above-mentioned state of the art, the utility model aims to provide a kind of core iron for magnetic device, and this core iron has excellent magnetic property and mechanical property, has good decay resistance and shock resistance simultaneously.
In order to realize above-mentioned technical purpose, the technical scheme that the utility model adopts is:
A kind of core iron for magnetic device, comprise axle and be socketed in the non-crystaline amorphous metal body on axle, described non-crystaline amorphous metal body is that iron-based amorphous alloy ribbon material to detour on axle and to be formed through annealing in process, it is characterized in that: also comprise encapsulated layer, it is peripheral that described encapsulated layer is arranged on non-crystaline amorphous metal body, for encapsulating described Fe-based amorphous alloy body, itself and external environment are isolated.
As preferably, described encapsulated layer is one or more materials in epoxy resin, polyacetal resin, polyphenylene oxide etc.
As preferably, described encapsulated layer is double-layer structure, is made up of with the second encapsulated layer being arranged on the first encapsulated layer periphery the first encapsulated layer being arranged on non-crystaline amorphous metal body periphery.As preferred further, described first encapsulated layer is epoxy resin layer, and the second encapsulated layer is polyacetal resin layer.
Described shaft material is not limit, and comprises stainless steel, silicon steel, pure iron, epoxy resin, polyacetal resin etc.; As preferably, described shaft material is one or more materials in epoxy resin, polyacetal resin, polyphenylene oxide etc.
Described encapsulated layer, for filling the described non-crystaline amorphous metal body of envelope, makes itself and external environment isolate, and as preferably, described encapsulated layer is also arranged on axle side, simultaneously for encapsulating axle, itself and external environment is isolated.
Described magnetic device is not limit, and comprises the devices such as electromagnet, electromagnetically operated valve, relay, electromagnetic lifter.
The diameter of described axle is not limit, and can adjust according to the diameter of required core iron endoporus.
The utility model also proposes a kind of method preparing the above-mentioned core iron for magnetic device, comprises the steps:
(1) Fe-based amorphous band is detoured on axle, obtain non-crystaline amorphous metal body;
(2) the non-crystaline amorphous metal body that step (1) obtains is carried out annealing heat treatment;
(3) with encapsulating material, the non-crystaline amorphous metal body after step (2) process is encapsulated, make it to be isolated from the outside.
In described step (2), as preferably, annealing heat treatment is carried out in argon gas or nitrogen heat treatment furnace.
In described step (2), annealing heat treatment process is:: be first warming up to uniform temperature, then cool.As preferably, heat treated process of annealing is: be first warming up to 320 ~ 420 DEG C with certain heating rate, held for some time, air cooling after then cooling to room temperature with the furnace or being cooled to 200 DEG C.As preferred further, described heating rate is 3 ~ 10 DEG C/s, and described temperature retention time is 0.5 ~ 2h.
In described step (3), method for packing is not limit, and comprises the non-crystaline amorphous metal surface coating of aqueous encapsulating material, spraying or dipping lacquer obtained in step (2), then solidifies.
In actual applications, the structure of core iron needed for device is often more complicated, and Fe-based amorphous band coiling is formed tubular non-crystaline amorphous metal by general employing at present, and then carries out structure processing, makes it structure identical with required core iron structure.But in practical operation, the difficulty of this structure processing is comparatively large, and the structure precision of the non-crystaline amorphous metal obtained is often lower.In order to reduce this structure difficulty of processing, improve structure precision, the utility model people optimizes above-mentioned steps (1), and the step (1) of this optimization comprises the steps (1-1) and step (1-2):
(1-1) establish Y direction along the thickness direction of the non-crystaline amorphous metal body in core iron to be prepared, the non-crystaline amorphous metal body in this core iron to be prepared is divided into some non-crystaline amorphous metal unit along Y-axis, in each unit, the width along X-direction is identical;
Iron-based amorphous alloy ribbon material is cut out into some Fe-based amorphous alloy subband materials; In each subband material, the width of this Fe-based amorphous alloy subband material is identical along its length; Make the width of one of them Fe-based amorphous alloy subband material corresponding along the width of X-direction with non-crystaline amorphous metal unit a certain in core iron to be prepared;
(1-2) axle is placed along X-direction, corresponding Fe-based amorphous alloy subband material is selected along the width of X-direction according to each non-crystaline amorphous metal unit, successively each Fe-based amorphous alloy subband material is carried out stacked detouring along Y-axis, detour the consistency of thickness of thickness and corresponding non-crystaline amorphous metal unit,, namely obtain the non-crystaline amorphous metal body identical with the non-crystaline amorphous metal body true form in core iron to be prepared.
In sum, the utility model adopts the core iron in iron-base amorphous alloy material formation magnetic device, utilize iron-base amorphous alloy material magnetic property is excellent, energy consumption is low, stability is high advantage to improve the magnetic property of core iron, reduce energy consumption, and improve the stability of core iron; And, the utility model arranges encapsulated layer in core iron periphery, non-crystaline amorphous metal body is encapsulated in wherein, not only effectively prevent non-crystaline amorphous metal body directly exposed on core iron surface, through friction, collide and fall the problems such as slag, cracking, fracture, and effectively prevent non-crystaline amorphous metal body and directly contact with external environment, surrounding structure elements in application process, cause the problem that the stress sensitivity of this core iron is large, corrosion resistance is poor, thus improve the useful life of core iron, ensure that the stable performance of magnetic device.
In addition, adopt preferred iron-based amorphous alloy ribbon material in the utility model to detour method, detour described in also overcoming the problem that body structure difficulty of processing is large, machining accuracy is low.
Therefore, core iron described in the utility model and preparation method thereof has a good application prospect in the magnetic device comprising core iron, and the operational environment that when being particularly useful for work, core iron exists residing for displacement, core iron has the practical application such as corrosivity.
Accompanying drawing explanation
Fig. 1 is the structural representation for the non-crystaline amorphous metal core iron of electromagnetically operated valve in the utility model embodiment 1;
Fig. 2 is for the non-crystaline amorphous metal core iron of electromagnetically operated valve and the coercive force comparison diagram of soft-magnetic stainless steel core iron in the utility model embodiment 1;
Fig. 3 be in the utility model embodiment 1 for the non-crystaline amorphous metal core iron of electromagnetically operated valve and soft-magnetic stainless steel core iron at different exciting magnetization curve figure after the match;
Fig. 4 is the striking experiment result for the non-crystaline amorphous metal core iron of the un-encapsulated of electromagnetically operated valve in the utility model embodiment 1;
Fig. 5 be in the utility model embodiment 1 for electromagnetically operated valve through encapsulation non-crystaline amorphous metal core iron compression experiment figure;
Fig. 6 is the structural representation for the non-crystaline amorphous metal core iron of electromagnetically operated valve in the utility model embodiment 3;
Fig. 7 is the structural representation for the non-crystaline amorphous metal core iron of electromagnetically operated valve in the utility model embodiment 4.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail, it is pointed out that the following stated embodiment is intended to be convenient to understanding of the present utility model, and any restriction effect is not play to it.
Reference numeral in Fig. 1,6,7 is: 1-axle, 2-connector, 3-first Fe-based amorphous alloy subband material, 4-second Fe-based amorphous alloy subband material, 5-the 3rd Fe-based amorphous alloy subband material, 6-first encapsulated layer, 7-second encapsulated layer.
Embodiment 1:
Present embodiments provide a kind of core iron for electromagnetically operated valve.As shown in Figure 1, this core iron comprises axle 1 and is socketed in the non-crystaline amorphous metal body on axle 1.
Axle 1 is stainless steel material.
Non-crystaline amorphous metal body is hollow cylindrical, and as shown in Figure 1, namely this non-crystaline amorphous metal body is made up of the first non-crystaline amorphous metal unit closely connected together, the second non-crystaline amorphous metal unit and the 3rd non-crystaline amorphous metal unit its cross-sectional structure.First non-crystaline amorphous metal unit, the second non-crystaline amorphous metal unit, the 3rd non-crystaline amorphous metal unit are all in hollow cylindrical.If Y direction is along the thickness direction of this non-crystaline amorphous metal body, then along Y-axis positive direction, be followed successively by the first non-crystaline amorphous metal unit, the second non-crystaline amorphous metal unit, the 3rd non-crystaline amorphous metal unit.Further, the first non-crystaline amorphous metal unit, the second non-crystaline amorphous metal unit, the 3rd non-crystaline amorphous metal unit are not identical along the width of X-direction; First non-crystaline amorphous metal unit, the second non-crystaline amorphous metal unit, the 3rd non-crystaline amorphous metal unit are not identical along the thickness of Y direction.
This core iron also comprises the encapsulated layer being arranged on non-crystaline amorphous metal body periphery, for by this axle 1 and non-crystaline amorphous metal body and the external world isolated.This encapsulated layer is double-layer structure, by being arranged on first encapsulated layer of axle 1 with non-crystaline amorphous metal body periphery, and is arranged on the second encapsulated layer composition of the first encapsulated layer periphery.First encapsulated layer is epoxy resin layer, and the second encapsulated layer is polyacetal resin layer.
Below this core iron is called non-crystaline amorphous metal core iron, the preparation method of this non-crystaline amorphous metal core iron is as follows:
(1) structure of the non-crystaline amorphous metal body according to Fig. 1, prepare the iron-based amorphous alloy ribbon material of different in width: the first Fe-based amorphous alloy subband material 3, its width is identical along the width of X-direction with the first non-crystaline amorphous metal unit; Second Fe-based amorphous alloy subband material 4, its width is identical along the width of X-direction with the second non-crystaline amorphous metal unit; 3rd Fe-based amorphous alloy subband material 5, its width is identical along the width of X-direction with the 3rd non-crystaline amorphous metal unit;
(2) place axle 1 along X-direction, along Y-axis, the first Fe-based amorphous alloy subband material 3 is detoured on axle 1, until its thickness reaches the thickness of the first non-crystaline amorphous metal unit along Y direction, obtain the first non-crystaline amorphous metal unit;
Second Fe-based amorphous alloy subband material 4 is detoured on the first non-crystaline amorphous metal unit, until its thickness reaches the thickness of the second non-crystaline amorphous metal unit along Y direction, obtains the second non-crystaline amorphous metal unit;
3rd Fe-based amorphous alloy subband material 5 is detoured on the second non-crystaline amorphous metal unit, until its thickness reaches the thickness of the 3rd non-crystaline amorphous metal unit along Y direction, obtains the 3rd non-crystaline amorphous metal unit; This first non-crystaline amorphous metal unit, the second non-crystaline amorphous metal unit and the 3rd non-crystaline amorphous metal unit composition non-crystaline amorphous metal body;
(3) the non-crystaline amorphous metal body that step (2) obtains is carried out annealing heat treatment: in argon gas or nitrogen heat-treatment furnace, first 320 ~ 420 DEG C are warming up to 3 ~ 10 DEG C/s heating rate, insulation 0.5 ~ 2h, then cools to room temperature with the furnace or air cooling after being cooled to 200 DEG C;
(4) epoxy resin is coated in the both side surface of the non-crystaline amorphous metal surface after step (3) process and axle 1, after solidification, obtains the first encapsulated layer; Then, polyacetal resin is coated in the first encapsulated layer surface, after solidification, obtains the second encapsulated layer.
By the coercive force of the above-mentioned obtained non-crystaline amorphous metal core iron of DC B-H instrument test, the coercive force of test result with the soft-magnetic stainless steel core iron with same structure is contrasted, as shown in Figure 2, the coercive force showing this non-crystaline amorphous metal core iron is 5.6A/m, much smaller than the coercive force of soft-magnetic stainless steel core iron.
By the above-mentioned obtained non-crystaline amorphous metal core iron of DC B-H instrument test at different exciting magnetization curve after the match, test result and the soft-magnetic stainless steel core iron with same structure are contrasted at different exciting magnetization curve after the match, as shown in Figure 3, show the magnetic flux density of this non-crystaline amorphous metal core iron under 2.5Oe, 10Oe exciting field and be respectively 1.1Oe, 1.41Oe, far above the magnetic flux density of soft-magnetic stainless steel core iron under 30Oe exciting field.
Therefore, the non-crystaline amorphous metal core iron in the present embodiment 1 has excellent soft magnet performance, can realize very high magnetic flux density under lower magnetizing field, adopts that the iron magnet exciting coil number of turn of the electromagnetically operated valve of this non-crystaline amorphous metal core iron is few, electric current is little, can realize low energy consumption.
Tested the Vickers hardness of this non-crystaline amorphous metal core iron by Vickers hardness instrument, the Vickers hardness of test result with the soft-magnetic stainless steel core iron with same structure is contrasted, as shown in the table:
| Non-crystaline amorphous metal core iron | Soft-magnetic stainless steel core iron | |
| Vickers hardness (HV) | 980 | 270 |
Show the hardness of this non-crystaline amorphous metal core iron far above the soft-magnetic stainless steel core iron with same structure.Therefore, if do not take low-durometer material to encapsulate this non-crystaline amorphous metal core iron, other elements in electromagnetically operated valve will be worn, and cause the electromagnetically operated valve life-span to reduce.
Carry out striking experiment to the non-crystaline amorphous metal core iron of the un-encapsulated obtained after above-mentioned steps (3) process, as shown in Figure 4, there is fracture and fragmentation in the non-crystaline amorphous metal core iron periphery of this un-encapsulated.
By universal testing machine, compression experiment is carried out to the non-crystaline amorphous metal core iron through encapsulation obtained after above-mentioned steps (4) process, result as shown in Figure 5, show this non-crystaline amorphous metal core iron through encapsulation and there is very high intensity, the stressed of electromagnetically operated valve can be met and impact requirement.
Embodiment 2:
Present embodiments provide a kind of core iron for electromagnet.This core iron structure is substantially identical with the core iron structure in embodiment 1, and difference is axle 1 is epoxide resin material.
The preparation method of this core iron is substantially identical with the preparation method in embodiment 1, and difference is axle 1 is epoxide resin material.
Embodiment 3:
Present embodiments provide a kind of core iron for electromagnet.The structure of this core iron as shown in Figure 6, this structure is substantially identical with the core iron structure in embodiment 2, this core iron of difference also comprises connector 2, one end of this connector 2 is connected with axle 1 through encapsulated layer, the other end is for connecting other functional units, core iron can be realized by this connector 2 to be connected with the function of other functional units extraneous, such as electrical connection etc.
The preparation method of this core iron is substantially identical with the preparation method in embodiment 2, difference first adopts stainless steel shaft in step (2), first non-crystaline amorphous metal subband material is detoured on this stainless steel shaft, in step (3), take out this stainless steel shaft after annealing heat treatment, then infusion epoxy resin forms epoxy resin axle.This preparation method is specific as follows:
(1) identical with the step (1) in embodiment 1;
(2) the first Fe-based amorphous alloy subband material 3 is detoured on stainless steel shaft, until its thickness reaches the thickness of the first non-crystaline amorphous metal unit along Y direction, obtain the first non-crystaline amorphous metal unit;
Second Fe-based amorphous alloy subband material 4 is detoured on the first non-crystaline amorphous metal unit, until its thickness reaches the thickness of the second non-crystaline amorphous metal unit along Y direction, obtains the second non-crystaline amorphous metal unit;
3rd Fe-based amorphous alloy subband material 5 is detoured on the second non-crystaline amorphous metal unit, until its thickness reaches the thickness of the 3rd non-crystaline amorphous metal unit along Y direction, obtains the 3rd non-crystaline amorphous metal unit; This first non-crystaline amorphous metal unit, the second non-crystaline amorphous metal unit and the 3rd non-crystaline amorphous metal unit composition non-crystaline amorphous metal body;
(3) identical with the step (3) in embodiment 1;
(4) take out stainless steel shaft, obtain quill shaft, wherein infusion epoxy resin, inserted in this epoxy resin connector 2 one end, the other end is outside exposed, then solidifies simultaneously;
(5) apply epoxy resin in the both side surface of the non-crystaline amorphous metal surface after step (4) process and epoxy resin axle, after solidification, obtain the first encapsulated layer; Then, polyacetal resin is coated in the first encapsulated layer surface, after solidification, obtains the second encapsulated layer; Wherein, connector 2 one end is connected with epoxy resin through this second dress layer, the first encapsulated layer, and the other end is for connecting other functional units extraneous.
Adopt non-crystaline amorphous metal core iron obtained in the method for testing testing example 2-3 in embodiment 1 coercive force and at different exciting magnetization curve after the match, the coercive force that result shows this non-crystaline amorphous metal core iron is much smaller than the coercive force of soft-magnetic stainless steel with same structure, magnetic flux density is far above the magnetic flux density of soft-magnetic stainless steel with same structure, and namely this non-crystaline amorphous metal core iron has excellent magnetic property.
Adopt Vickers hardness and the impact resistance of non-crystaline amorphous metal core iron obtained in the method for testing testing example 2-3 in embodiment 1, result shows the hardness of this non-crystaline amorphous metal core iron far above the soft-magnetic stainless steel core iron with same structure; When this non-crystaline amorphous metal core iron un-encapsulated, its peripheral appearance ruptures and fragmentation; When this non-crystaline amorphous metal core iron has very high tolerance and resistance to impact after encapsulation.
Embodiment 4:
Present embodiments provide a kind of core iron for electromagnet.This core iron structure as shown in Figure 7, this structure is substantially identical with the core iron structure in embodiment 3, difference is the encapsulated layer being positioned at non-crystaline amorphous metal body left end face is the single layer structure that epoxy resin is formed, and compared with other portion faces of non-crystaline amorphous metal body, this left end face is thinner.This structural design is conducive to the magnetic attraction improving core iron.
The preparation method of this core iron is substantially identical with the preparation method in embodiment 3, and when difference is preparation the first encapsulated layer, the epoxy resin that non-crystaline amorphous metal body left end face coating thickness is thinner, obtains the first encapsulated layer after solidification; Then, except the epoxy resin layer position of this thinner thickness, polyacetal resin is coated in first all the other positions, encapsulated layer surface, after solidification, obtains the first encapsulated layer.
Above-described embodiment is used for explaining and the utility model is described; instead of the utility model is limited; in the protection range of spirit of the present utility model and claim, any amendment make the utility model and change, all fall into protection range of the present utility model.
Claims (6)
1. the core iron for magnetic device, comprise axle, and to be socketed on axle and to be detoured the non-crystaline amorphous metal body formed on axle and through annealing in process by iron-based amorphous alloy ribbon material, it is characterized in that: also comprise and be arranged on described non-crystaline amorphous metal body periphery, for filling the described Fe-based amorphous alloy of envelope, make the encapsulated layer that itself and external environment are isolated.
2. as claimed in claim 1 for the core iron of magnetic device, it is characterized in that: described encapsulated layer is double-layer structure, be made up of the first encapsulated layer being arranged on non-crystaline amorphous metal body periphery and the second encapsulated layer of being arranged on the first encapsulated layer periphery.
3., as claimed in claim 1 for the core iron of magnetic device, it is characterized in that: described encapsulated layer is also arranged on axle side.
4. as claimed in claim 1 for the core iron of magnetic device, it is characterized in that: described core iron also comprises connector, one end of this connector is connected with axle through encapsulated layer, and the other end is for connecting other functional units.
5. the core iron for magnetic device as described in claim arbitrary in Claims 1-4, is characterized in that: described magnetic device is electromagnet, electromagnetically operated valve, relay or electromagnetic lifter.
6. the core iron for magnetic device as described in claim arbitrary in Claims 1-4, is characterized in that: the diameter of described axle can adjust according to the diameter of required core iron endoporus.
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| CN106158224A (en) * | 2015-03-26 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | A kind of core iron for magnetic device and preparation method thereof |
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| CN106158224A (en) * | 2015-03-26 | 2016-11-23 | 中国科学院宁波材料技术与工程研究所 | A kind of core iron for magnetic device and preparation method thereof |
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Effective date of registration: 20220922 Address after: No. 189 Guangming Road, Zhuangshi street, Zhenhai District, Ningbo City, Zhejiang Province Patentee after: Ningbo magnetic materials Application Technology Innovation Center Co.,Ltd. Address before: 315201, No. 519, Zhuang Avenue, Zhenhai District, Zhejiang, Ningbo Patentee before: NINGBO INSTITUTE OF MATERIALS TECHNOLOGY & ENGINEERING, CHINESE ACADEMY OF SCIENCES |