CN103060822B - 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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- CN103060822B CN103060822B CN201310001286.0A CN201310001286A CN103060822B CN 103060822 B CN103060822 B CN 103060822B CN 201310001286 A CN201310001286 A CN 201310001286A CN 103060822 B CN103060822 B CN 103060822B
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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 comprises: semi-processed electric steel is prepared by smelting molten iron, RH refining, CSP continuous casting, hot continuous rolling, acid pickling, cold rolling and annealing, a rotor or stator punched sheet is prepared by splitting and punching the semi-processed electric steel, 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, the general trend of Jiang Shi China Economic development taps a new source of energy, 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, also be the directivity product that develop actively is produced 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, simpler than coating process, and meet European Union " ROHS " command request; Its steel plate utilization ratio improves, 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 object 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: adopt semi-technological electrical steel by molten iron through smelting, RH is concise, CSP continuous casting, hot continuous rolling, pickling and cold rolling and annealing make after semi-technological electrical steel, through itemize punching press, make after rotor or stator punching, rotor or stator punching are carried out to oil firing, decarburization stress relief annealing, and finally turning blue to process makes finished product.Described oil firing operation is: the stator, the rotor punching that enter in oil-fired furnace are heated to 380 ~ 450 ℃ of technological temperatures, make the punching press lubricating oil burn off in 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 DX producer gas generator to produce,, then will add warm air and through utilidor, send into oil-fired furnace bottom and heat air heating through interchanger; It two is at oil-fired furnace side wall, to be provided with electric heating spoke heat pipe the workpiece in oil-fired furnace is heated and is incubated; And at the top of oil-fired furnace, be provided with pump circulation and stir blower fan, to guarantee temperature uniformity.
Decarburization stress relief annealing operation of the present invention is to carry out in DX protective atmosphere; specifically comprise the following steps: workpiece is heated to 800 ~ 900 ℃ and insulation under DX protective atmosphere; to eliminate the stress of sheet punching press, lamination generation; make workpiece decarburization, recrystallization; guarantee its homogeneous microstructure, there is best iron loss and magnetic induction density.Heat workpiece heating, holding-zone spoke heat pipe hanging both sides in burner hearth, and top is provided with thermal treatment Special water cooling blower fan to stirring in stove, to guarantee that furnace temperature is even.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.
The present invention also can be provided 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 arranged on both sides and the top in burner hearth, 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 vacuum nitrogen continuous annealing furnace, at N
2or N
2+ H
2protective atmosphere under; in continuous annealing furnace, 700～900 ℃ are carried out Full Annealing; when slow cooling is to approximately 450 ℃ again, pass into the water vapor processing of turning blue; keep turning blue for 2-2.5 hour processing; 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, in stove, be filled with high-temperature vapor and a small amount of DX protective atmosphere, keep turning blue for 2-2.5 hour processing, make punching sheet surface form the oxide film (Fe of one deck densification
3o
4).The inner bag of described blueing furnace can be made into sealing Ma Fushi structure, and to maintain furnace pressure be barotropic state.
Punching of the present invention can be by molten iron through smelting, RH is concise, CSP continuous casting, hot continuous rolling, pickling and cold rolling and annealing make after semi-technological electrical steel, after itemize punching press, makes punching.
Finally, 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 makes the punching of semi-processed cold-rolled non-oriented electrical steel stator and rotor by adopting controlled atmosphere oil firing, after annealing, turning blue, thereby replaces the method that existing full technique cold rolling non-oriented electrical steel is produced 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 and be less than 4.2W/kg, magnetic induction density B 50 is not less than 1.70T, compare with current full-technique non-oriented electrical steel national standard 50W470, iron loss reduces, magnetic induction density improves, (non-oriented electrical steel iron loss P1.5/50 as common in the B50A470 of Baosteel is less than 4.7 W/kg to have solved the conflicting problem of full technique cold rolling non-oriented electrical steel iron loss and magnetic induction density, magnetic induction density B 50 is not less than 1.64T, see the electrical steel product handbook of Baosteel).The present invention, by stress relieving and magnetic recrystallization annealing are combined, fully excavates and has utilized the potentiality of material, 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 feature 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, and finally carry out again electromagnetic performance check, layer outward appearance of turning blue and thickness and detect.
Described oil firing operation is: the stator, the rotor punching that enter in oil-fired furnace are heated to 380 ~ 450 ℃ of technological temperatures, make the punching press lubricating oil burn off in punching, purify punching sheet surface smooth finish, avoid punching to paste phenomenon, guarantee that punching has best insulating property.Oil-fired furnace heating is divided into two portions, and the one, the high-temperature gas that utilizes DX producer gas generator to produce,, then will add warm air and send into 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.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 is controlled as shown in the table:
Table 1:DX gas ingredients
| Title | CO 2 | CO | H 2 | H 2O | N 2 |
| % | 2.5~5 | 5~10.5 | 0.7~2.2 | ≤0.1015 | All the other |
Described decarburization stress relief annealing operation comprises: workpiece is heated to 800 ~ 900 ℃ and insulation under DX protective atmosphere; to eliminate the stress of sheet punching press, lamination generation; make workpiece decarburization, recrystallization, guarantee its homogeneous microstructure, there is best iron loss and magnetic induction density.Heat workpiece heating, holding-zone spoke heat pipe hanging both sides in burner hearth, and top is provided with thermal treatment Special water cooling blower fan to stirring in stove, to guarantee that furnace temperature is even.
Due to electrical sheet material, for high temperature, need a best rate of temperature fall during to borehole cooling, this speed is most important to its performance, so the slow cooling section of annealing furnace is provided with pressure cooling system, this system adopts air-cooled structure, many stainless steel airducts are arranged on both sides and top in burner hearth, the outer gas blower of stove is sent into cold wind in aweather managing, every airduct is all provided with separately regulated valve, the size that can open by regulated valve regulates the speed of cooling of workpiece, guarantees that workpiece temperature slow cooling speed meets processing requirement.
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), not oxidizable in installation process to guarantee stator and rotor.Blueing furnace inner bag is made into sealing Ma Fushi, and workpiece operation, heating are all carried out at Ma Funei, can maintain certain malleation, and steam-energy is infiltrated in stator and rotor punching lamination completely, and the oxide film of formation is finer and close, even.
Embodiment 2, treatment process of the present invention comprises: parent roll is divided into the billot that width is 294.00 (0.10/-0.20) mm on banding machine, punching continuously on high velocity ram machine, produce rotor for electromotor, the loose sheet of stator, these rotors, the loose sheet of stator are tied up to stator: 100/string (10.03kg), rotor: 150/string (9.90kg), note, the burr direction of all punchings need be all consistent with mark mouth, comprises anneal and final cartoning.The punching of tying up is stacked neatly up and down in annealing turnover iron case domestic demand, and punching endoporus is unobstructed up and down.Put on continuous annealing furnace feeding platform, first enter oil-fired furnace, at 400 ℃, by 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 ℃, slow cooling to 550 ℃ left and right, enter again 450-550 ℃ of blueing furnace, in blueing furnace, continue to pass into water vapor, keep turning blue for 2-2.5 hour processing, 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 user can be according to need with directly purchasing for motor manufacture, owing to there is no coating, there is 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 on banding machine, punching continuously on high velocity ram machine, produce rotor for electromotor, the loose sheet of stator, these rotors, the loose sheet of stator are tied up to stator: 100/string (14kg), rotor: 150/string (14kg), note, the burr direction of all punchings need be all consistent with mark mouth, comprises anneal and final cartoning.The punching of tying up is stacked neatly up and down in annealing turnover iron case domestic demand, and punching endoporus is unobstructed up and down.Put on continuous annealing furnace feeding platform, first enter oil-fired furnace, at 400 ℃, by 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 ℃, slow cooling is to 450-550 ℃ of left and right, enter again 530 ℃ of blueing furnaces, in blueing furnace, continue to pass into water vapor, keep turning blue for 2-2.5 hour processing, 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 user can be according to need with directly purchasing for motor manufacture, owing to there is no coating, there is the good feature of environmental protection and cost advantage.
Claims (4)
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: by molten iron through smelting, RH is concise, CSP continuous casting, hot continuous rolling, pickling and cold rolling and annealing make after semi-technological electrical steel, through itemize punching press, make after rotor or stator punching, rotor or stator punching are carried out to oil firing, decarburization stress relief annealing, and finally turning blue to process makes finished product; Described oil firing operation is: the stator, the rotor punching that enter in oil-fired furnace are heated to 380 ~ 450 ℃ of technological temperatures, make the punching press lubricating oil burn off in 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 DX producer gas generator to produce,, then will add warm air and through utilidor, send into oil-fired furnace bottom and heat air heating through interchanger; It two is at oil-fired furnace side wall, to be provided with electric heating spoke heat pipe the workpiece in oil-fired furnace is heated and is incubated; And at the top of oil-fired furnace, be provided with pump circulation and stir blower fan, to guarantee temperature uniformity; Described decarburization stress relief annealing operation is to carry out in DX protective atmosphere, specifically comprise the following steps: workpiece is heated to 800 ~ 900 ℃ and insulation under DX protective atmosphere, to eliminate the stress of sheet punching press, lamination generation, make workpiece decarburization, recrystallization, guarantee its homogeneous microstructure, there is best iron loss and magnetic induction density, heat workpiece heating, holding-zone spoke heat pipe hanging both sides in burner hearth, top is provided with thermal treatment Special water cooling blower fan to stirring in stove, to guarantee that furnace temperature is even; 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; Slow cooling section at annealing furnace is provided with pressure cooling system, described cooling system adopts air-cooled structure, be about to many stainless steel airducts and be arranged on both sides and the top in burner hearth, the outer gas blower of stove is sent into cold wind in aweather managing, and on every airduct, regulated valve is installed separately; Described stress relieving is processed and is adopted vacuum nitrogen continuous annealing furnace, at N
2or N
2+ H
2protective atmosphere under; in continuous annealing furnace, 700～900 ℃ are carried out Full Annealing; when slow cooling is to approximately 450 ℃ again, to passing in blueing furnace, comprise the water vapor processing of turning blue; keep turning blue for 2-2.5 hour processing; the inner bag of blueing furnace is made into sealing Ma Fushi structure; and to maintain furnace pressure be barotropic state, 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 described operation of turning blue comprises: under 450 ~ 550 ℃ of furnace temperature, in blueing furnace, be filled with high-temperature vapor and a small amount of DX protective atmosphere, keep turning blue for 2-2.5 hour processing, make punching sheet surface form the oxide film of one deck densification.
2. the treatment process that turns blue of semi-technological electrical steel rotor or stator according to claim 1, it is characterized in that: parent roll is divided into the billot that width is 294.00 (0.10/-0.20) mm on banding machine, punching continuously on high velocity ram machine, produce rotor for electromotor, the loose sheet of stator, these rotors, the loose sheet of stator are tied up to stator: 100/string, rotor: 150/string, the punching of tying up is stacked neatly up and down in annealing turnover iron case domestic demand, and punching endoporus is unobstructed up and down; Put on continuous annealing furnace feeding platform, first enter oil-fired furnace, at 400 ℃, by 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 to 550 ℃ left and right, enter again 450-550 ℃ of blueing furnace, in blueing furnace, continue to pass into water vapor, keep turning blue for 2-2.5 hour processing, make oxide film that the surface of punching forms one deck densification as insulating film, then lamination is made into rotor for electromotor, stator.
3. the treatment process that turns blue of semi-technological electrical steel rotor or stator according to claim 1, it is characterized in that: parent roll is divided into the billot that width is 332.00 (0/-0.10) mm on banding machine, punching continuously on high velocity ram machine, produce rotor for electromotor, the loose sheet of stator, these rotors, the loose sheet of stator are tied up to stator: 100/string, rotor: 150/string, the punching of tying up is stacked neatly up and down in annealing turnover iron case domestic demand, and punching endoporus is unobstructed up and down; Put on continuous annealing furnace feeding platform, first enter oil-fired furnace, at 400 ℃, by 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 450-550 ℃ of left and right, enter again 530 ℃ of blueing furnaces, in blueing furnace, continue to pass into water vapor, keep turning blue for 2-2.5 hour processing, make oxide film that the surface of punching forms one deck densification as insulating film, then lamination is made into rotor for electromotor, stator.
4. the treatment process that turns blue of semi-technological electrical steel rotor or stator according to claim 1, is characterized in that: after electromagnetic performance check, layer outward appearance of turning blue and thickness detect, can produce.
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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 |
| CN104329927B (en) * | 2014-10-11 | 2016-08-24 | 浙江迪贝电气股份有限公司 | Continuous annealing is turned blue the special wind-guiding drying device of continuous tunnel furnace oil-removing area |
| CN105132659B (en) * | 2015-09-11 | 2017-08-22 | 格兰德电气有限公司 | The Technology for Heating Processing of stator core and rotor core |
| 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 |
| 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 |
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| JP6944146B1 (en) * | 2020-08-03 | 2021-10-06 | トヨタ紡織株式会社 | Heat treatment method and heat treatment furnace |
| CN114069986B (en) * | 2021-10-25 | 2024-01-19 | 马鞍山钢铁股份有限公司 | Method for processing motor iron core of high-efficiency compressor |
| JP7341404B1 (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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