CN103060822A - Blueing treatment process for semi-processed electrical steel rotor or stator - Google Patents
Blueing treatment process for semi-processed electrical steel rotor or stator Download PDFInfo
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- CN103060822A CN103060822A CN2013100012860A CN201310001286A CN103060822A CN 103060822 A CN103060822 A CN 103060822A CN 2013100012860 A CN2013100012860 A CN 2013100012860A CN 201310001286 A CN201310001286 A CN 201310001286A CN 103060822 A CN103060822 A CN 103060822A
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Abstract
The invention relates to a blueing treatment process for a semi-processed electrical steel rotor or stator, which is mainly used for solving the technical problems of high energy consumption, great pollution, high cost and the like of the prior art. The key points of the technical scheme are as follows: semi-processed electric steel is adopted for preparing a rotor or stator punched sheet, then oil firing, decarbonization, distressing and annealing are performed on the rotor or stator punched sheet, and blueing treatment is finally performed to prepare a finished product. The blueing treatment process is mainly used in production processes of rotor or stator iron cores of motors.
Description
Technical field
The present invention relates to the production technique of a kind of rotor or stator, especially a kind of production technique that adopts semi-technological electrical steel to produce rotor and stator.
Background technology
Energy-saving and emission-reduction, tapping a new source of energy will be the general trend of China's Economic development, half-technique non oriented electrical steel is that steel mill produces and meets punching performance requriements, user final annealing and form the electrical steel that uses magnetic after punching, it also is the directivity product produced of develop actively in the world, and developed country's electric machine iron core such as American-European North America adopts half handicraft products mostly, half technique cold rolling electric is after user's annealing, and performance improves greatly; Semi-technological electrical steel product punching postheat treatment has 20 ~ 40% siliconized plate not participate in thermal treatment, has saved the energy; And the layer that turns blue also can be in heat treatment process forms thereupon, do not need coating, and is simpler than coating process, and meets European Union " ROHS " command request; Its steel plate utilization ratio improves, the motor manufacturing cost reduces, and has very large development prospect.At present forming the development trend that half-technique non oriented electrical steel replaces full technological electrical steel, how turning blue efficiently to process runs into many difficulties in actual applications.
Summary of the invention
The purpose of this invention is to provide a kind of energy-saving and environmental protection, processing performance is good, production cost is lower semi-technological electrical steel rotor or the treatment process that turns blue of stator.
The technical solution adopted for the present invention to solve the technical problems is: it comprises following operation: after adopting semi-technological electrical steel to make rotor or stator punching, rotor or stator punching are carried out oil firing, decarburization stress relief annealing, and turning blue at last to process makes finished product.Described oil firing operation is: stator, the rotor punching that will enter in the oil-fired furnace are heated to 380 ~ 450 ℃ of technological temperatures, make the punching press lubricating oil burn off in the punching, purify punching sheet surface smooth finish.Described oil-fired furnace is provided with 2 hot spotss: the high-temperature gas that the first utilizes the DX producer gas generator to produce, then will add warm air and send into the oil-fired furnace bottom through utilidor and heat air heating through interchanger; It two is to be provided with electric heating spoke heat pipe at the oil-fired furnace side wall workpiece in the oil-fired furnace is heated and to be incubated; And be provided with pump circulation at the top of oil-fired furnace and stir blower fan, to guarantee temperature uniformity.
Decarburization stress relief annealing operation of the present invention is to carry out in the DX protective atmosphere; specifically may further comprise the steps: under the DX protective atmosphere, workpiece is heated to 800 ~ 900 ℃ and also is incubated; to eliminate the stress of sheet punching press, lamination generation; make workpiece decarburization, recrystallization; guarantee its homogeneous microstructure, have best iron loss and magnetic induction density.Heating, holding-zone spoke heat pipe are hung in burner hearth both sides workpiece are heated, and the top is equipped with thermal treatment Special water cooling blower fan to stirring in the stove, and is even to guarantee furnace temperature.Described DX gas ingredients is: CO2 is that 2.5 ~ 5%, CO is that 5 ~ 10.5%, H2 is 0.7 ~ 2.2, H2O≤0.1015, and all the other are N2.
The present invention also can be equipped with pressure cooling system in the slow cooling section of annealing furnace, described cooling system adopts air-cooled structure, be about to many stainless steel airducts and be installed in burner hearth interior both sides and top, the outer gas blower of stove is sent into cold wind in aweather managing, and on every airduct regulated valve is installed separately.
Stress relieving of the present invention is processed also can adopt the vacuum nitrogen continuous annealing furnace; under the protective atmosphere of N2 or N2+H2; 700～900 ℃ are carried out Full Annealing in continuous annealing furnace; pass into the water vapor processing of turning blue when slow cooling is to about 450 ℃ again; make oxide film that the surface of punching forms one deck densification as insulating film, then lamination is made into rotor or stator core.
The operation of turning blue of the present invention comprises: under 450 ~ 550 ℃ of furnace temperature, be filled with high-temperature vapor and a small amount of DX protective atmosphere in stove, make punching sheet surface form the oxide film (Fe3O4) of one deck densification.The inner bag of described blueing furnace can be made into sealing Ma Fushi structure, and to keep furnace pressure be barotropic state.
Punching of the present invention can be by molten iron through smelting, after RH is concise, CSP continuous casting, hot continuous rolling, pickling and cold rolling and annealing makes semi-technological electrical steel, making punching after the itemize punching press.
At last, after detecting, electromagnetic performance check, layer outward appearance of turning blue and thickness can produce.
The invention has the beneficial effects as follows: the present invention is by adopting the controlled atmosphere oil firing, make the punching of semi-processed cold-rolled non-oriented electrical steel stator and rotor after annealing, turning blue, thereby replaces the method that existing full technique cold rolling non-oriented electrical steel is produced the stator and rotor punching.The semi-processed cold-rolled non-oriented electrical steel stator of processing by the inventive method, rotor product electromagnetic performance can reach P1.5/50 less than 4.2W/kg, magnetic induction density B 50 is not less than 1.70T, compare with present full-technique non-oriented electrical steel national standard 50W470, iron loss reduces, magnetic induction density improves, the conflicting problem of full technique cold rolling non-oriented electrical steel iron loss and magnetic induction density that solved is (such as the common non-oriented electrical steel iron loss of the B50A470 P1.5/50 of Baosteel less than 4.7 W/kg, magnetic induction density B 50 is not less than 1.64T, sees the electrical steel product handbook of Baosteel).The present invention fully excavates and has utilized the potentiality of material by stress relieving and magnetic recrystallization annealing are combined, and takes full advantage of resource, and the layer that turns blue forms in heat treatment process thereupon, do not need coating, simpler than coating process, meet European Union " ROHS " command request.In sum, the characteristics such as that the present invention has is energy-conservation, reduction of discharging, environmental protection, and also processing performance is good, production cost is lower.It can be widely used in producing in the explained hereafter such as rotor and stator core.
Embodiment
Below in conjunction with embodiment the present invention is described in further details.
Embodiment 1, and it comprises following operation technical process of the present invention: oil firing → decarburization stress relief annealing → turn blue, carry out at last electromagnetic performance check, layer outward appearance of turning blue and thickness again and detect.
Described oil firing operation is: stator, the rotor punching that will enter in the oil-fired furnace are heated to 380 ~ 450 ℃ of technological temperatures, make the punching press lubricating oil burn off in the punching, purify punching sheet surface smooth finish, avoid punching to paste phenomenon, guarantee that punching has best insulating property.The oil-fired furnace heating is divided into two portions, and the one, the high-temperature gas that utilizes the DX producer gas generator to produce, then will add warm air and send into the oil-fired furnace bottom through utilidor air heating through interchanger; The 2nd, side wall arranges that electric heating spoke heat pipe heats, is incubated workpiece.The top is provided with pump circulation and stirs blower fan, accelerates furnace air and flows, and improves heating efficiency, guarantees temperature uniformity.
Described DX gas ingredients control is as shown in the table:
Table 1:DX gas ingredients
| Title | CO2 | CO | H2 | H2O | N2 |
| % | 2.5~5 | 5~10.5 | 0.7~2.2 | ≤0.1015 | All the other |
Described decarburization stress relief annealing operation comprises: under the DX protective atmosphere workpiece is heated to 800 ~ 900 ℃ and also is incubated; to eliminate the stress of sheet punching press, lamination generation; make workpiece decarburization, recrystallization, guarantee its homogeneous microstructure, have best iron loss and magnetic induction density.Heating, holding-zone spoke heat pipe are hung in burner hearth both sides workpiece are heated, and the top is equipped with thermal treatment Special water cooling blower fan to stirring in the stove, and is even to guarantee furnace temperature.
Because electrical sheet material needs the rate of temperature fall an of the best during to borehole cooling for high temperature, this speed is most important to its performance, so the slow cooling section of annealing furnace is equipped with pressure cooling system, this system adopts air-cooled structure, many stainless steel airducts are installed in both sides and top in the burner hearth, the outer gas blower of stove is sent into cold wind in aweather managing, every airduct all is equipped with separately regulated valve, the speed of cooling that can regulate workpiece by the size that regulated valve is opened guarantees that workpiece temperature slow cooling speed meets processing requirement.
The described operation of turning blue comprises: under 450 ~ 550 ℃ of furnace temperature, be filled with high-temperature vapor and a small amount of DX protective atmosphere in stove, make punching sheet surface form the oxide film (Fe of one deck densification
3O
4), to guarantee that stator and rotor are difficult for oxidation in the installation process.The blueing furnace inner bag is made into sealing Ma Fushi, and workpiece operation, heating are all carried out at Ma Funei, can keep certain malleation, and steam-energy is infiltrated in the stator and rotor punching lamination fully, and the oxide film of formation is finer and close, even.
Embodiment 2, treatment process of the present invention comprises: it is the 294.00 (0.10/-0.20) billots of mm that parent roll is divided into width at banding machine, continuously punching on high velocity ram machine, produce rotor for electromotor, the loose sheet of stator, these rotors, the loose sheet of stator are tied up stator: 100/string (10.03kg), rotor: 150/string (9.90kg), notice that the burr direction of all punchings need be all consistent with the mark mouth, comprise anneal and final cartoning.The punching of tying up is stacked up and down neatly in annealing turnover iron case domestic demand, and the punching endoporus is unobstructed up and down.Put on the continuous annealing furnace feeding platform, at first enter oil-fired furnace, 400 ℃ with punching press lubricating oil burn off, purify punching sheet surface, improve smooth finish, avoid punching to paste phenomenon.Then at CO, CO
2, H
2, N
2And a small amount of H
2Under the controlled atmosphere of O, in annealing furnace, anneal for 800-900 ℃, about slow cooling to 550 ℃, enter again 450-550 ℃ of blueing furnace, continue to pass into water vapor in the blueing furnace, keep the processing of turning blue in 2-2.5 hour, make oxide film that the surface of punching forms one deck densification as insulating film, then lamination is made into rotor for electromotor, stator.All the other are with embodiment 1.
Semi-processed cold-rolled non-oriented electrical steel rotor, stator after this method is processed, its iron loss is less than 4.2W/kg, and magnetic induction density is not less than 1.70T, and the user can be used for the motor manufacturing with directly purchasing according to need, owing to do not have coating, have the good feature of environmental protection and cost advantage.
Embodiment 3, treatment process of the present invention comprises: parent roll is divided into the billot that width is 332.00 (0/-0.10) mm at banding machine, continuously punching on high velocity ram machine, produce rotor for electromotor, the loose sheet of stator, these rotors, the loose sheet of stator are tied up stator: 100/string (14kg), rotor: 150/string (14kg), notice that the burr direction of all punchings need be all consistent with the mark mouth, comprise anneal and final cartoning.The punching of tying up is stacked up and down neatly in annealing turnover iron case domestic demand, and the punching endoporus is unobstructed up and down.Put on the continuous annealing furnace feeding platform, at first enter oil-fired furnace, 400 ℃ with punching press lubricating oil burn off, purify punching sheet surface, improve smooth finish, avoid punching to paste phenomenon.Then under the controlled atmosphere of CO, CO2, H2, N2 and a small amount of H2O, in annealing furnace, anneal for 800-900 ℃, slow cooling is to about 450-550 ℃, enter again 530 ℃ of blueing furnaces, continue to pass into water vapor in the blueing furnace, keep the processing of turning blue in 2-2.5 hour, make oxide film that the surface of punching forms one deck densification as insulating film, then lamination is made into rotor for electromotor, stator.
Semi-processed cold-rolled non-oriented electrical steel rotor, stator after this method is processed, its iron loss is less than 4.2W/kg, and magnetic induction density is not less than 1.70T, and the user can be used for the motor manufacturing with directly purchasing according to need, owing to do not have coating, have the good feature of environmental protection and cost advantage.
Claims (10)
1. the treatment process that turns blue of a semi-technological electrical steel rotor or stator, it is characterized in that it comprises following operation: after adopting semi-technological electrical steel to make rotor or stator punching, rotor or stator punching are carried out oil firing, decarburization stress relief annealing, and turning blue at last to process makes finished product.
2. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 1, it is characterized in that its described oil firing operation is: stator, the rotor punching that will enter in the oil-fired furnace are heated to 380 ~ 450 ℃ of technological temperatures, make the punching press lubricating oil burn off in the punching, purify punching sheet surface smooth finish.
3. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 2, it is characterized in that: described oil-fired furnace is provided with 2 hot spotss: the high-temperature gas that the first utilizes the DX producer gas generator to produce,, then will add warm air and send into oil-fired furnace bottom through utilidor and heat air heating through interchanger; It two is to be provided with electric heating spoke heat pipe at the oil-fired furnace side wall workpiece in the oil-fired furnace is heated and to be incubated; And be provided with pump circulation at the top of oil-fired furnace and stir blower fan, to guarantee temperature uniformity.
4. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 1, it is characterized in that: described decarburization stress relief annealing operation is to carry out in the DX protective atmosphere, specifically may further comprise the steps: under the DX protective atmosphere, workpiece is heated to 800 ~ 900 ℃ and also is incubated, to eliminate sheet punching press, the stress that lamination produces, make the workpiece decarburization, recrystallization, guarantee its homogeneous microstructure, has best iron loss and magnetic induction density, heating, holding-zone spoke heat pipe is hung in burner hearth both sides workpiece is heated, the top is equipped with thermal treatment Special water cooling blower fan to stirring in the stove, and is even to guarantee furnace temperature; Described DX gas ingredients is: CO
2Be that 2.5 ~ 5%, CO is 5 ~ 10.5%, H
2Be 0.7 ~ 2.2, H
2O≤0.1015, all the other are N
2
5. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 4, it is characterized in that: the slow cooling section at annealing furnace is equipped with pressure cooling system, described cooling system adopts air-cooled structure, be about to many stainless steel airducts and be installed in burner hearth interior both sides and top, the outer gas blower of stove is sent into cold wind in aweather managing, and on every airduct regulated valve is installed separately.
6. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 1, it is characterized in that: described stress relieving is processed and is adopted the vacuum nitrogen continuous annealing furnace, at N
2Or N
2+ H
2Protective atmosphere under; 700～900 ℃ are carried out Full Annealing in continuous annealing furnace; pass into the water vapor processing of turning blue when slow cooling is to about 450 ℃ again, make oxide film that the surface of punching forms one deck densification as insulating film, then lamination is made into rotor or stator core.
7. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 1; it is characterized in that: the described operation of turning blue comprises: under 450 ~ 550 ℃ of furnace temperature; in stove, be filled with high-temperature vapor and a small amount of DX protective atmosphere, make punching sheet surface form the oxide film (Fe of one deck densification
3O
4).
8. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 1, it is characterized in that: the inner bag of described blueing furnace is made into sealing Ma Fushi structure, and to keep furnace pressure be barotropic state.
9. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 1, it is characterized in that: described punching is through smelting, after RH is concise, CSP continuous casting, hot continuous rolling, pickling and cold rolling and annealing makes semi-technological electrical steel, making punching after the itemize punching press by molten iron.
10. the treatment process that turns blue of described semi-technological electrical steel rotor or stator according to claim 1 is characterized in that: can produce after electromagnetic performance check, layer outward appearance of turning blue and thickness detect.
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|---|---|---|---|
| CN201310001286.0A CN103060822B (en) | 2013-01-04 | 2013-01-04 | Blueing treatment process for semi-processed electrical steel rotor or stator |
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| CN103060822B CN103060822B (en) | 2014-07-16 |
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| 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 |
| CN104329927A (en) * | 2014-10-11 | 2015-02-04 | 浙江迪贝电气股份有限公司 | Special air guide dryer for continuous annealing blueing tunnel furnace oil removal area |
| CN105132659A (en) * | 2015-09-11 | 2015-12-09 | 浙江格兰德机械有限公司 | Heat treatment technology for stator cores and rotor cores |
| CN106048507A (en) * | 2016-07-18 | 2016-10-26 | 华南理工大学 | Decarburizing annealing and blueing treatment method for Si-free Mn-containing semi-processed non-oriented silicon steel |
| CN106086354A (en) * | 2016-07-18 | 2016-11-09 | 华南理工大学 | A kind of production method of the coating non-oriented electrical steel 50W600 that turns blue |
| 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 |
| CN107739785A (en) * | 2017-09-22 | 2018-02-27 | 宁国井田机电有限公司 | A kind of idle call stator core Technology for Heating Processing |
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| 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 |
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| CN114069986A (en) * | 2021-10-25 | 2022-02-18 | 马鞍山钢铁股份有限公司 | High-efficiency compressor motor iron core processing method |
| JP7341405B1 (en) | 2022-12-27 | 2023-09-11 | トヨタ紡織株式会社 | Heat treatment furnace and heat treatment method |
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