CN101082075A - Process and device for coating-free electrical steel annealing and bluing - Google Patents
Process and device for coating-free electrical steel annealing and bluing Download PDFInfo
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- CN101082075A CN101082075A CN 200610026997 CN200610026997A CN101082075A CN 101082075 A CN101082075 A CN 101082075A CN 200610026997 CN200610026997 CN 200610026997 CN 200610026997 A CN200610026997 A CN 200610026997A CN 101082075 A CN101082075 A CN 101082075A
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Abstract
The no-coating electric steel sheet annealing and blueing process includes the following steps: 1. annealing laminated no-coating silicon steel sheets inside a bell type furnace under hydrogen atmosphere; 2. vacuumizing the bell type furnace to vacuum degree lower than 95000 Pa after the silicon steel sheets are cooled slowly to 300-450 deg.c, and leading blueing water solution to the furnace before maintaining the temperature for 20-60 min; and 3. vacuumizing for the second time, filling nitrogen for cooling and discharging in the temperature lower than 150 deg.c. The process has high annealing quality, homogeneous blueing effect, and capacity of raising the magnetic induction coefficient of silicon steel sheets and lowering their iron loss.
Description
Technical field
The invention belongs to heat treatment technics, particularly be used to not have the annealing of coating electrical sheet lamination and turn blue technology and device.
Background technology
The equipment of handling with the annealing and the flange of no coating silicon steel production electric machine iron core mainly contains two kinds at present, and a kind of is early stage bell furnace or pit furnace+blueing furnace; Another kind is a continuous annealing furnace.
Early stage pit furnace, the function of not turning blue is come out of the stove annealed electric machine iron core sheet the technology that oxidation is turned blue in air about 300 ℃ in process of cooling.Technological process like this influences the various performance index of electric machine iron core.
Also have part producer to use bell furnace instead and realize the technology of turning blue of annealing; add a spot of hydrogen (can adopt purity nitrogen ammonification branch to vent one's spleen) with nitrogen or nitrogen and be protection gas; adopt the sheet annealing of loosing, send out blue mode; when being warmed up to about 300 ℃ after for some time oil removing; feed shielding gas and continue to be warmed up to 760～800 ℃ again; be incubated about 2 hours, annealed electric machine iron core sheet 450 ℃ of left and right sides water-filling steams in process of cooling are turned blue after the technology of handling, be cooled to below 300 ℃ and come out of the stove.The shortcoming of this technology is to loose bonding die and punching distortion usually take place after sheet is annealed, and directly influences follow-up lamination, and has many punchings to scrap.As " micromotor " 2005.1 disclosed " thermal treatment of compressor electric motor siliconized plate ".
Bonding die, oxidation and punching distortion because loosing, original bell furnace or pit furnace semi-technological electrical steel sheet usually take place after the sheet annealing, directly influence follow-up lamination, and produce and to have many punchings to scrap, and can't realize the operation that half technology silicon steel finished product stator (rotor) lamination is directly annealed and turned blue.
Summary of the invention
The objective of the invention is to develop a kind of no coating electrical steel annealing and turn blue technology and device, the finished product iron core after half technology is not promptly had the coating silicon steel punched chip and folds sheet carries out stress relieving and turns blue close-coupled processing.
For achieving the above object, technical scheme of the present invention is, no coating electrical steel annealing with turn blue technology, it comprises the steps:
1) will not have the coating silicon steel punched chip and fold sheet after the finished product iron core be placed in the bell furnace, under hydrogen atmosphere, carry out anneal;
2) when sample slow cooling to 300～450 ℃, the bell furnace inner cover is vacuumized, vacuum tightness＜-95000Pa, in stove, feed to turn blue and use aqueous medium, be incubated 20～60min simultaneously;
3) vacuumize back inflated with nitrogen cooling once more, after 150 ℃, come out of the stove.
Wherein, described aqueous medium is water, water vapour or turns blue and use reagent.
In the step 1) bell furnace inner cover is vacuumized, vacuum tightness＜-95000Pa.
In addition, the no coating electrical steel annealing of the present invention and the device that turns blue comprise that table, table end face are provided with at least one circle for the conduit that discharges the oil blackeite medium, offer porose on this conduit; The material frame is installed on the table; Inner cover covers at outside the material frame; Heating mantles covers at outside the inner cover; The shielding gas pipe connects and establishes in the furnace chamber, and an external vacuum pump; Recirculation blower is arranged under the table.
In addition, described conduit is to be provided with along table end face circumference.
Nozzle is also established in described supravasal hole, can regulate straying quatity as required.
Characteristics of the present invention are to use hydrogen as shielding gas in the bell furnace stove; carrying out double technology silicon steel laminations product under 700～820 ℃ of high temperature anneals; in this temperature range; hydrogen reduces fully to specimen surface; make specimen surface clean very much and have high surfactivity, handle for turning blue and carried out good preparation.
Adopt before turning blue to vacuumize, make to be in vacuum state in the sheet of sample behind the lamination and the slit between the sheet, be easy to enter into after the medium that turns blue enters and reach the effect of evenly turning blue between the lamella.
Beneficial effect of the present invention
Use the heat treatment furnace of the present invention annealing device that turns blue, can better finish the semi-technological electrical steel lamination after annealing technological process of turning blue, the annealing quality that not only can guarantee but also can be sent out uniformly effect blue.Adopt this device not increasing the magnetic strength that can improve the silicon steel laminations product after annealing is turned blue under any production cost condition, reduce iron loss, improve the efficient of the finished product.According to test, electrical efficiency can improve about 1-2%, has eliminated problems such as bonding die, oxidation and punching distortion easily take place in original heat treatment furnace.
Description of drawings
Fig. 1 does not have the schema of the annealing of coating electrical steel and the technology of turning blue for the present invention;
Fig. 2 does not have the structural representation of the annealing of coating electrical steel and the device that turns blue for the present invention;
Fig. 3 is the A-A sectional view of Fig. 2.
Embodiment
Referring to Fig. 1, the no coating electrical steel annealing of the present invention and the technology of turning blue, finished product iron core after half technology promptly do not had the coating silicon steel punched chip and fold sheet is placed on (step 101) in the bell furnace, after carrying out inspection of hermetic seal, heating mantles is set, and atmosphere vacuumizes inflated with nitrogen (step 102) in the inner cover, vacuum pump system is extracted nitrogen out once more, feeds hydrogen and begins heating (step 103); Under hydrogen atmosphere, double technology--no coating silicon steel laminations product carries out anneal and be incubated 2-3 hour (step 104) under 700～820 ℃ of high temperature; When finished product iron core slow cooling to 300～450 ℃ (step 105), the bell furnace inner cover is vacuumized (step 106), vacuum tightness＜-95000Pa after, in stove, feed and turn blue with aqueous medium (water or water vapour or turn blue use reagent), (step 107); Be incubated 20～60min simultaneously, vacuumize once more and come out of the stove (step 108) discharging (step 109) after the back inflated with nitrogen is cooled fast to below 150 ℃.
Referring to Fig. 2, Fig. 3, the no coating electrical steel annealing of the present invention and the device that turns blue comprise, table 1 is provided with a circle conduit 7 along table 1 end face, offers porose 8 on this conduit; Material frame 2 is installed on the table 1; Inner cover 3 covers at outside the material frame 2; Heating mantles 4 covers at outside the inner cover; Shielding gas pipe 5 connects and establishes in the furnace chamber, and an external vacuum pump system 9; Recirculation blower 6 is arranged at table 1 time.
For obtaining well to turn blue homogeneity, along even spaced apart 20 holes 8 on the stainless conduit 7 of table circumferential direction configuration,, the homogeneous media of turning blue realizes in the stove turning blue so that being entered in table 1 end face, bin 2 bottoms.
When sending out blue the processing, the product 10 of lamination behind the half technology silicon steel punching is placed in the charging basket 2 on the table 1, inner cover 3 is set and compresses, after carrying out inspection of hermetic seal, heating mantles 4 is set, furnace air is extracted out, in stove, charge into nitrogen with vacuum pump system 9, vacuum pump system 9 is extracted nitrogen out once more, feeds hydrogen and begin to heat with heating mantles 4; Temperature is incubated after reaching the annealing temperature set(ting)value, slowly cool off subsequently, when temperature reaches when turning blue design temperature, with pumped vacuum systems 9 with vacuumize in the stove (＜-95000Pa), the stainless steel tube divider that distributes by turn blue medium pipeline 7 and the Fa Lan homogeneous media medium that will turn blue feeds in the stove, and at 350～400 ℃ of following insulation 20～60min, again with pumped vacuum systems 9 with vacuumize in the stove (＜-95000Pa), and feeding nitrogen, leave heating mantles 4 under order, cooling cowl is set, comes out of the stove after being cooled to 150 ℃, end of processing turns blue.
Claims (6)
1. do not have the annealing of coating electrical steel and turn blue technology, it comprises the steps:
1) will not have the coating silicon steel punched chip and fold sheet after the finished product iron core be placed in the bell furnace, under hydrogen atmosphere, carry out anneal then;
2) when sample slow cooling to 300～450 ℃, the bell furnace inner cover is vacuumized, vacuum tightness＜-95000Pa, in stove, feed to turn blue and use aqueous medium, be incubated 20～60min simultaneously;
3) vacuumize back inflated with nitrogen cooling once more, after 150 ℃, come out of the stove.
2. no coating electrical steel annealing as claimed in claim 1 with turn blue technology, it is characterized in that described aqueous medium is water, water vapour or turns blue and use reagent.
3. the no coating electrical steel annealing as claimed in claim 1 and the technology of turning blue is characterized in that, in the step 1) bell furnace inner cover vacuumized, and vacuum tightness＜-95000Pa.
4. do not have the annealing of coating electrical steel and turn blue device, it is characterized in that, comprise,
Table, table end face are provided with at least one circle for the conduit that discharges the oil blackeite medium, and be porose along offering on the conduit;
The material frame is installed on the table;
Inner cover covers at outside the material frame;
Heating mantles covers at outside the inner cover;
The shielding gas pipe connects and establishes in the furnace chamber, and an external vacuum pump;
Recirculation blower is arranged under the table.
5. the no coating electrical steel annealing as claimed in claim 4 and the device that turns blue is characterized in that described conduit is to be provided with along table end face circumference.
6. the no coating electrical steel annealing as claimed in claim 4 and the device that turns blue is characterized in that nozzle is also established in described supravasal hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100269973A CN100467623C (en) | 2006-05-29 | 2006-05-29 | Process and device for coating-free electrical steel annealing and bluing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100269973A CN100467623C (en) | 2006-05-29 | 2006-05-29 | Process and device for coating-free electrical steel annealing and bluing |
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| Publication Number | Publication Date |
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| CN101082075A true CN101082075A (en) | 2007-12-05 |
| CN100467623C CN100467623C (en) | 2009-03-11 |
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| CNB2006100269973A Active CN100467623C (en) | 2006-05-29 | 2006-05-29 | Process and device for coating-free electrical steel annealing and bluing |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871041A (en) * | 2010-07-14 | 2010-10-27 | 吴建荣 | Continuous annealing bluing process of sheet punching work piece of cold rolling silicon steel sheet |
| CN101935746A (en) * | 2010-09-30 | 2011-01-05 | 株洲市变压器有限公司 | Annealing treatment method for coiled iron core of triangular coiled iron core transformer |
| CN102586566A (en) * | 2012-03-15 | 2012-07-18 | 青岛海立美达电机有限公司 | Heat treatment process for iron core of motor |
| CN103060822A (en) * | 2013-01-04 | 2013-04-24 | 湖南雪豹电器有限公司 | Blueing treatment process for semi-processed electrical steel rotor or stator |
| CN103066768A (en) * | 2013-01-04 | 2013-04-24 | 湖南雪豹电器有限公司 | Production craft utilizing semi-processed steel to produce motor rotor and motor stator |
| CN103147084A (en) * | 2013-01-23 | 2013-06-12 | 新余钢铁集团有限公司 | Vertical continuous annealing furnace bluing device and bluing technology thereof |
| CN103205550A (en) * | 2013-03-25 | 2013-07-17 | 浙江迪贝电气股份有限公司 | Synergism heat treatment technology for motor rotor |
| CN103333998A (en) * | 2013-07-15 | 2013-10-02 | 上海特波电机有限公司 | Annealing heat treatment method of motor iron core punching sheet |
| CN105112612A (en) * | 2015-09-06 | 2015-12-02 | 重庆赛迪热工环保工程技术有限公司 | Bell furnace platform |
| CN105132856A (en) * | 2015-08-24 | 2015-12-09 | 浙江格兰德机械有限公司 | Treatment process of rotor surface |
| CN106282904A (en) * | 2016-08-26 | 2017-01-04 | 安徽皖南电机股份有限公司 | The oxidation technology of motor stamping |
| CN107119178A (en) * | 2017-05-03 | 2017-09-01 | 南通长江电器实业有限公司 | A kind of dynamo sheet annealing process |
| CN109182907A (en) * | 2018-09-30 | 2019-01-11 | 日照钢铁控股集团有限公司 | A kind of method of endless rolling production half-technique non oriented electrical steel |
| CN110212712A (en) * | 2017-07-15 | 2019-09-06 | 芜湖乾凯材料科技有限公司 | Electric machine iron core of low stress and preparation method thereof |
| CN112176158A (en) * | 2020-10-09 | 2021-01-05 | 新疆八一钢铁股份有限公司 | Annealing and bluing process for common cold-rolled coil |
| CN112226608A (en) * | 2020-09-07 | 2021-01-15 | 江阴市南闸中天电器有限公司 | Heat treatment process for silicon steel sheet |
| CN114302972A (en) * | 2020-08-03 | 2022-04-08 | 丰田纺织株式会社 | Heat treatment method and heat treatment furnace |
-
2006
- 2006-05-29 CN CNB2006100269973A patent/CN100467623C/en active Active
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871041A (en) * | 2010-07-14 | 2010-10-27 | 吴建荣 | Continuous annealing bluing process of sheet punching work piece of cold rolling silicon steel sheet |
| CN101871041B (en) * | 2010-07-14 | 2011-09-14 | 吴建荣 | Continuous annealing bluing process of sheet punching work piece of cold rolling silicon steel sheet |
| CN101935746A (en) * | 2010-09-30 | 2011-01-05 | 株洲市变压器有限公司 | Annealing treatment method for coiled iron core of triangular coiled iron core transformer |
| CN101935746B (en) * | 2010-09-30 | 2013-01-23 | 株洲市变压器有限公司 | Annealing treatment method for coiled iron core of triangular coiled iron core transformer |
| CN102586566A (en) * | 2012-03-15 | 2012-07-18 | 青岛海立美达电机有限公司 | Heat treatment process for iron core of motor |
| CN103066768A (en) * | 2013-01-04 | 2013-04-24 | 湖南雪豹电器有限公司 | Production craft utilizing semi-processed steel to produce motor rotor and motor stator |
| CN103060822B (en) * | 2013-01-04 | 2014-07-16 | 湖南雪豹电器有限公司 | Blueing treatment process for semi-processed electrical steel rotor or stator |
| CN103060822A (en) * | 2013-01-04 | 2013-04-24 | 湖南雪豹电器有限公司 | Blueing treatment process for semi-processed electrical steel rotor or stator |
| CN103147084A (en) * | 2013-01-23 | 2013-06-12 | 新余钢铁集团有限公司 | Vertical continuous annealing furnace bluing device and bluing technology thereof |
| CN103205550A (en) * | 2013-03-25 | 2013-07-17 | 浙江迪贝电气股份有限公司 | Synergism heat treatment technology for motor rotor |
| CN103205550B (en) * | 2013-03-25 | 2015-10-21 | 浙江迪贝电气股份有限公司 | A kind of Synergism heat treatment technology for motor rotor |
| CN103333998A (en) * | 2013-07-15 | 2013-10-02 | 上海特波电机有限公司 | Annealing heat treatment method of motor iron core punching sheet |
| CN105132856B (en) * | 2015-08-24 | 2017-12-22 | 格兰德电气有限公司 | The handling process of rotor surface |
| CN105132856A (en) * | 2015-08-24 | 2015-12-09 | 浙江格兰德机械有限公司 | Treatment process of rotor surface |
| CN105112612A (en) * | 2015-09-06 | 2015-12-02 | 重庆赛迪热工环保工程技术有限公司 | Bell furnace platform |
| CN106282904A (en) * | 2016-08-26 | 2017-01-04 | 安徽皖南电机股份有限公司 | The oxidation technology of motor stamping |
| CN107119178A (en) * | 2017-05-03 | 2017-09-01 | 南通长江电器实业有限公司 | A kind of dynamo sheet annealing process |
| CN110212712A (en) * | 2017-07-15 | 2019-09-06 | 芜湖乾凯材料科技有限公司 | Electric machine iron core of low stress and preparation method thereof |
| CN110212712B (en) * | 2017-07-15 | 2021-09-07 | 芜湖乾凯材料科技有限公司 | Low-stress motor iron core and preparation method thereof |
| CN109182907A (en) * | 2018-09-30 | 2019-01-11 | 日照钢铁控股集团有限公司 | A kind of method of endless rolling production half-technique non oriented electrical steel |
| CN109182907B (en) * | 2018-09-30 | 2021-09-07 | 日照钢铁控股集团有限公司 | Method for producing semi-process non-oriented electrical steel by endless rolling |
| CN114302972A (en) * | 2020-08-03 | 2022-04-08 | 丰田纺织株式会社 | Heat treatment method and heat treatment furnace |
| CN114302972B (en) * | 2020-08-03 | 2024-02-09 | 丰田纺织株式会社 | Heat treatment method and heat treatment furnace |
| CN112226608A (en) * | 2020-09-07 | 2021-01-15 | 江阴市南闸中天电器有限公司 | Heat treatment process for silicon steel sheet |
| CN112176158A (en) * | 2020-10-09 | 2021-01-05 | 新疆八一钢铁股份有限公司 | Annealing and bluing process for common cold-rolled coil |
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| Publication number | Publication date |
|---|---|
| CN100467623C (en) | 2009-03-11 |
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