CN107276334B - A kind of electric machine iron core of low stress and preparation method thereof - Google Patents
A kind of electric machine iron core of low stress and preparation method thereof Download PDFInfo
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- CN107276334B CN107276334B CN201710577530.6A CN201710577530A CN107276334B CN 107276334 B CN107276334 B CN 107276334B CN 201710577530 A CN201710577530 A CN 201710577530A CN 107276334 B CN107276334 B CN 107276334B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
Abstract
The invention discloses electric machine iron core of a kind of low stress and preparation method thereof, the preparation method includes: that silicon steel sheet blank is carried out melting, obtains silicon steel molten liquid, wherein the temperature of melting is 1300-1380 DEG C, and the time of melting is 2-4h；Silicon steel molten liquid is ejected on chill roll and get rid of band, iron core blank M is obtained after cooled and solidified；Iron core blank is carried out to make annealing treatment for the first time respectively and second of annealing obtains iron core blank N；Iron core blank N is subjected to stretch-bending straightening processing, obtains electric machine iron core after cooling；Solving iron core can be influenced during the preparation process by material, heat treatment etc., biggish internal stress, the excessive arrangement that will affect magnetism molecule on iron core of internal stress be generated in stretch-bending straightening, and then lead to the problem of certain influence to the work of motor.
Description
Technical field
The present invention relates to iron core preparation fields, and in particular, to a kind of electric machine iron core of low stress and preparation method thereof.
Background technique
Iron core (magnetic core) plays the important and pivotal role inside entire motor, it is used to increase the magnetic flux of inductance coil
Amount has realized the maximum conversion of electromagnetic power.Iron core is usually to be formed by a stator and a rotor combination, and stator is usually made
For the part not rotated, and rotor is usually the interior location for being embedded in stator.Iron core during the preparation process can be by material, Re Chu
Reason etc. influences, and generates biggish internal stress in stretch-bending straightening, the excessive arrangement that will affect magnetism molecule on iron core of internal stress, in turn
Certain influence is generated to the work of motor.
Summary of the invention
The object of the present invention is to provide electric machine iron cores of a kind of low stress and preparation method thereof, solve iron core and are preparing
Cheng Zhonghui is influenced by material, heat treatment etc., biggish internal stress is generated in stretch-bending straightening, internal stress is excessive to be will affect on iron core
The arrangement of magnetism molecule, and then certain influence is led to the problem of to the work of motor.
To achieve the goals above, the present invention provides a kind of preparation method of the electric machine iron core of low stress, the preparations
Method includes:
(1) silicon steel sheet blank being subjected to melting, obtains silicon steel molten liquid, wherein the temperature of melting is 1300-1380 DEG C,
The time of melting is 2-4h；
(2) silicon steel molten liquid is ejected on chill roll and get rid of band, iron core blank M is obtained after cooled and solidified；
(3) iron core blank is carried out making annealing treatment for the first time respectively and second of annealing obtains iron core blank N,
In, the temperature of annealing is 800-850 DEG C for the first time, and the time of heat preservation is 2-4h, and the temperature of second of annealing is
650-700 DEG C, the time of heat preservation is 6-8h；
(4) iron core blank N is subjected to stretch-bending straightening processing, obtains electric machine iron core after cooling.
The present invention also provides a kind of electric machine iron core of low stress, the electric machine iron core is made by above-mentioned preparation method.
Through the above technical solutions, the present invention provides a kind of preparation method of the electric machine iron core of low stress, the preparation
Method includes: that silicon steel sheet blank is carried out melting, obtains silicon steel molten liquid, wherein the temperature of melting is 1300-1380 DEG C, is melted
The time of refining is 2-4h；Silicon steel molten liquid is ejected on chill roll and get rid of band, iron core blank M is obtained after cooled and solidified；It will
Iron core blank carries out making annealing treatment for the first time respectively and second of annealing obtains iron core blank N, wherein at first time annealing
The temperature of reason is 800-850 DEG C, and time of heat preservation is 2-4h, and the temperature of second of annealing is 650-700 DEG C, heat preservation when
Between be 6-8h；Iron core blank N is subjected to stretch-bending straightening processing, obtains electric machine iron core after cooling；By preparing work to electric machine iron core
The optimization of skill so that electric machine iron core obtained has lower internal stress, and then avoids magnetic point on the excessive influence iron core of internal stress
The problem of son arrangement.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or
Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively
It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more
New numberical range, these numberical ranges should be considered as specific open herein.
The present invention provides a kind of preparation method of the electric machine iron core of low stress, the preparation method includes:
(1) silicon steel sheet blank being subjected to melting, obtains silicon steel molten liquid, wherein the temperature of melting is 1300-1380 DEG C,
The time of melting is 2-4h；
(2) silicon steel molten liquid is ejected on chill roll and get rid of band, iron core blank M is obtained after cooled and solidified；
(3) iron core blank is carried out making annealing treatment for the first time respectively and second of annealing obtains iron core blank N,
In, the temperature of annealing is 800-850 DEG C for the first time, and the time of heat preservation is 2-4h, and the temperature of second of annealing is
650-700 DEG C, the time of heat preservation is 6-8h；
(4) iron core blank N is subjected to stretch-bending straightening processing, obtains electric machine iron core after cooling.
In a preferred embodiment of the invention, in order to further eliminate the internal stress of electric machine iron core obtained,
Silicon steel sheet blank includes the raw material of following weight percent: aluminium: 0.12-0.14%, silicon: 1.5-2.1%, manganese: 0.05-0.1%, zinc:
0.03-0.05%, charcoal: 0.01-0.03% and balance iron.
In a preferred embodiment of the invention, in order to further eliminate the internal stress of electric machine iron core obtained,
In step (3), the preparation method further include: iron core blank is put into vacuum annealing furnace, in nitrogen and/or ar gas environment
It is middle to carry out annealing for the first time respectively and make annealing treatment for the second time.
In a preferred embodiment of the invention, in order to further eliminate the internal stress of electric machine iron core obtained,
Relative to 1 cubic metre of vacuum annealing furnace space, the injection rate of nitrogen and/or argon gas is 20-30L/min.
In a preferred embodiment of the invention, in order to enable electric machine iron core is capable of forming protective film, in step
(4) in, the preparation method further include: electric machine iron core obtained is subjected to processing of turning blue.
In a preferred embodiment of the invention, in order to enable electric machine iron core is capable of forming protective film, place of turning blue
The condition of reason includes at least: temperature is 300-400 DEG C, time 60-80min.
In a preferred embodiment of the invention, in order to further eliminate the internal stress of electric machine iron core obtained,
It is cooling using air-cooled by the way of in step (4), and cooling method includes: by stretch-bending straightening treated iron core blank N elder generation
It is cooled to 300-350 DEG C, continues to be cooled to room temperature after keeping the temperature 30-50min.
The present invention also provides a kind of electric machine iron core of low stress, the electric machine iron core is made by above-mentioned preparation method.
The present invention will be described in detail by way of examples below.
Embodiment 1
By silicon steel sheet blank carry out melting, obtain silicon steel molten liquid, wherein the temperature of melting be 1300 DEG C, melting when
Between be 2h；Silicon steel molten liquid is ejected on chill roll and get rid of band, iron core blank M is obtained after cooled and solidified；By iron core blank
It is put into vacuum annealing furnace, carries out annealing for the first time respectively in nitrogen environment and second of annealing obtains iron core blank
N(is expected relative to 1 cubic metre of vacuum annealing furnace space, and the injection rate of nitrogen is 20L/min), wherein at first time annealing
The temperature of reason is 800 DEG C, and the time of heat preservation is 2h, and the temperature of second of annealing is 650 DEG C, and the time of heat preservation is 6h；It will
Iron core blank N carries out stretch-bending straightening processing, by stretch-bending straightening treated iron core blank N is first cooled to 300 DEG C, keep the temperature 30min
After continue to be cooled to room temperature, the processing that then carries out turning blue (temperature is 300 DEG C, time 60min) obtains electric machine iron core A1,
In, silicon steel sheet blank includes the raw material of following weight percent: aluminium: 0.12%, silicon: and 1.5%, manganese: 0.05%, zinc: 0.03%, charcoal:
0.01% and balance iron.
Embodiment 2
By silicon steel sheet blank carry out melting, obtain silicon steel molten liquid, wherein the temperature of melting be 1380 DEG C, melting when
Between be 4h；Silicon steel molten liquid is ejected on chill roll and get rid of band, iron core blank M is obtained after cooled and solidified；By iron core blank
It is put into vacuum annealing furnace, carries out annealing for the first time respectively in an argon atmosphere and second of annealing obtains iron core blank
N(is expected relative to 1 cubic metre of vacuum annealing furnace space, and the injection rate of argon gas is 30L/min), wherein at first time annealing
The temperature of reason is 850 DEG C, and the time of heat preservation is 4h, and the temperature of second of annealing is 700 DEG C, and the time of heat preservation is 8h；It will
Iron core blank N carries out stretch-bending straightening processing, by stretch-bending straightening treated iron core blank N is first cooled to 350 DEG C, keep the temperature 50min
After continue to be cooled to room temperature, the processing that then carries out turning blue (temperature is 400 DEG C, time 80min) obtains electric machine iron core A2,
In, silicon steel sheet blank includes the raw material of following weight percent: aluminium: 0.14%, silicon: and 2.1%, manganese: 0.1%, zinc: 0.05%,
Charcoal: 0.03% and balance iron.
Embodiment 3
By silicon steel sheet blank carry out melting, obtain silicon steel molten liquid, wherein the temperature of melting be 1340 DEG C, melting when
Between be 3h；Silicon steel molten liquid is ejected on chill roll and get rid of band, iron core blank M is obtained after cooled and solidified；By iron core blank
It is put into vacuum annealing furnace, carries out annealing for the first time respectively in nitrogen and ar gas environment and second of annealing obtains
For iron core blank N(relative to 1 cubic metre of vacuum annealing furnace space, the injection rate of nitrogen and argon gas is 25L/min), wherein
The temperature of annealing is 820 DEG C for the first time, and the time of heat preservation is 3h, and the temperature of second of annealing is 670 DEG C, heat preservation
Time is 7h；Iron core blank N is subjected to stretch-bending straightening processing, treated that iron core blank N is first cooled to 320 by stretch-bending straightening
DEG C, continue to be cooled to room temperature after keeping the temperature 40min, the processing that then carries out turning blue (temperature is 350 DEG C, time 70min) obtains electricity
Machine iron core A3, wherein silicon steel sheet blank includes the raw material of following weight percent: aluminium: 0.13%, silicon: 1.8%, manganese: 0.07%,
Zinc: 0.04%, charcoal: 0.02% and balance iron.
Comparative example 1
It is carried out according to the method for embodiment 3, unlike, the temperature of annealing is 700 DEG C for the first time, the time of heat preservation
For 1h, the temperature of second of annealing is 600 DEG C, and the time of heat preservation is 5h, obtains electric machine iron core D1.
Comparative example 2
It is carried out according to the method for embodiment 3, unlike, the temperature of annealing is 900 DEG C for the first time, the time of heat preservation
For 5h, the temperature of second of annealing is 750 DEG C, and the time of heat preservation is 9h, obtains electric machine iron core D2.
Table 1
| Embodiment number | Relative permeability | Saturation induction density emu/g |
| Embodiment 1 | 100 | 162 |
| Embodiment 2 | 110 | 168 |
| Embodiment 3 | 105 | 165 |
| Embodiment 4 | 85 | 132 |
| Comparative example 1 | 80 | 135 |
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (8)
1. a kind of preparation method of the electric machine iron core of low stress, which is characterized in that the preparation method includes:
(1) silicon steel sheet blank is subjected to melting, obtains silicon steel molten liquid, wherein the temperature of melting is 1300-1380 DEG C, melting
Time be 2-4h；
(2) silicon steel molten liquid is ejected on chill roll and get rid of band, iron core blank M is obtained after cooled and solidified；
(3) iron core blank is carried out making annealing treatment for the first time respectively and second of annealing obtains iron core blank N, wherein the
The temperature once made annealing treatment is 800-850 DEG C, and the time of heat preservation is 2-4h, and the temperature of second of annealing is 650-700
DEG C, the time of heat preservation is 6-8h；
(4) iron core blank N is subjected to stretch-bending straightening processing, obtains electric machine iron core after cooling.
2. preparation method according to claim 1, wherein silicon steel sheet blank includes the raw material of following weight percent: aluminium:
0.12-0.14%, silicon: 1.5-2.1%, manganese: 0.05-0.1%, zinc: 0.03-0.05%, charcoal: 0.01-0.03% and balance iron.
3. preparation method according to claim 1, wherein in step (3), the preparation method further include: by iron core
Blank is put into vacuum annealing furnace, carries out annealing for the first time respectively in nitrogen and/or ar gas environment and second is annealed
Processing.
4. preparation method according to claim 3, wherein relative to 1 cubic metre of vacuum annealing furnace space, nitrogen and/
Or the injection rate of argon gas is 20-30L/min.
5. preparation method according to claim 1 or 2, wherein in step (4), the preparation method further include: will make
The electric machine iron core obtained carries out processing of turning blue.
6. preparation method according to claim 5, wherein the condition for processing of turning blue includes at least: temperature 300-400
DEG C, time 60-80min.
7. preparation method according to claim 1 or 2, wherein cooling by the way of air-cooled and cold in step (4)
But method include: by stretch-bending straightening treated iron core blank N is first cooled to 300-350 DEG C, continue after keeping the temperature 30-50min
It is cooled to room temperature.
8. a kind of electric machine iron core of low stress, which is characterized in that the electric machine iron core is as described in any one of claim 1-7
Preparation method be made.
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| CN201710577530.6A CN107276334B (en) | 2017-07-15 | 2017-07-15 | A kind of electric machine iron core of low stress and preparation method thereof |
| CN201910518803.9A CN110212712B (en) | 2017-07-15 | 2017-07-15 | Low-stress motor iron core and preparation method thereof |
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| CN201710577530.6A CN107276334B (en) | 2017-07-15 | 2017-07-15 | A kind of electric machine iron core of low stress and preparation method thereof |
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| CN115011767A (en) * | 2022-06-14 | 2022-09-06 | 国网智能电网研究院有限公司 | Heat-resisting notch oriented silicon steel three-dimensional wound iron core and annealing method and device thereof |
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| AT388394B (en) * | 1987-01-09 | 1989-06-12 | Vni Instrument Inst | METHOD FOR PRODUCING CUTTING TOOL |
| CN100467623C (en) * | 2006-05-29 | 2009-03-11 | 宝山钢铁股份有限公司 | Process and device for coating-free electrical steel annealing and bluing |
| JP5183550B2 (en) * | 2009-03-30 | 2013-04-17 | 日新製鋼株式会社 | Soft magnetic metal material parts with improved corrosion resistance and manufacturing method thereof |
| CN101630883B (en) * | 2009-08-14 | 2011-09-07 | 镇江中虎弹簧有限公司 | Manufacturing process of stator |
| CN102337384A (en) * | 2011-09-15 | 2012-02-01 | 上海日港置信非晶体金属有限公司 | Destressing method and device for amorphous alloy transformer iron core |
| CN102367547B (en) * | 2011-10-31 | 2013-03-13 | 山西太钢不锈钢股份有限公司 | Manufacture method of high-silicon aluminum content non-oriented silicon steel strip |
| JP5872334B2 (en) * | 2012-03-07 | 2016-03-01 | 新日鐵住金ステンレス株式会社 | Soft magnetic stainless steel fine wire and method for producing the same |
| CN103066768B (en) * | 2013-01-04 | 2014-03-12 | 湖南雪豹电器有限公司 | Production craft utilizing semi-processed steel to produce motor rotor and motor stator |
| KR101898368B1 (en) * | 2014-07-02 | 2018-09-12 | 신닛테츠스미킨 카부시키카이샤 | Non-oriented magnetic steel sheet, and manufacturing method for same |
| CN104911324B (en) * | 2015-07-09 | 2016-10-05 | 福建安顺变压器有限公司 | Stalloy vacuum annealing process |
| CN105950979B (en) * | 2016-07-11 | 2017-11-03 | 钢铁研究总院 | The crystal grain orientation pure iron and method of a kind of use secondary cold-rolling method manufacture |
| CN106653344A (en) * | 2016-11-15 | 2017-05-10 | 北京科技大学 | Preparation method of soft magnetic core of high silicon steel for medium and high frequency |
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Effective date of registration: 20230321 Address after: 048000 Mishan Industrial Park, Gaoping economic and Technological Development Zone, Gaoping City, Jincheng City, Shanxi Province Patentee after: Kangshuo (Shanxi) Low Stress Manufacturing System Technology Research Institute Co.,Ltd. Address before: 241000 Business Incubation Park No. 415, Weiqi Road, Yijiang District, Wuhu City, Anhui Province Patentee before: WUHU QIANKAI MATERIAL TECHNOLOGY Co.,Ltd. |