CN106591555B - A kind of annealing process after non-directional cold-rolling silicon steel disc cold rolling - Google Patents
A kind of annealing process after non-directional cold-rolling silicon steel disc cold rolling Download PDFInfo
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- CN106591555B CN106591555B CN201610941103.7A CN201610941103A CN106591555B CN 106591555 B CN106591555 B CN 106591555B CN 201610941103 A CN201610941103 A CN 201610941103A CN 106591555 B CN106591555 B CN 106591555B
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- 238000000137 annealing Methods 0.000 title claims abstract description 216
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 130
- 238000005097 cold rolling Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 59
- 239000012298 atmosphere Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 60
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 50
- 239000003921 oil Substances 0.000 claims description 25
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- 239000001257 hydrogen Substances 0.000 claims description 15
- 229910052739 hydrogen Inorganic materials 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 14
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 5
- 239000011265 semifinished product Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000047 product Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- -1 reduce coercivity Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1266—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest between cold rolling steps
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
The invention discloses the annealing process after a kind of non-directional cold-rolling silicon steel disc cold rolling, specific step is as follows: S1 for annealing process after the non-directional cold-rolling silicon steel disc cold rolling: annealing furnace carried out the pre-heat treatment before the annealing for carrying out silicon steel sheet, S2: primary annealing, S3: the manufacture of the nitrogen atmosphere in annealing furnace, S4: the cooling processing after primary annealing, S5: secondary cold-rolling processing, S6: double annealing processing, S7: when double annealing in furnace hydrogeneous nitrogen atmosphere manufacture, S8: the quick raising of temperature in annealing furnace, S9: the cooling processing of silicon steel sheet, S10: the alkali cleaning of silicon steel sheet after cooling, S11: the drying and processing of silicon steel sheet.The present invention is heat-treated silicon steel sheet by the way of twice annealing process, while temperature when twice annealing process and furnace atmosphere are all made of different modes, so as to greatly improve the thermal effectiveness of silicon steel sheet.
Description
Technical field
Annealing process the present invention relates to silicon steel sheet technical field, after specially a kind of non-directional cold-rolling silicon steel disc cold rolling.
Background technique
Silicon steel sheet, English name are silicon lamination, it is a kind of carbon containing extremely low silicon-iron soft magnetic alloy,
General silicon content is 0.5~4.5%.Silicon, which is added, can be improved the resistivity and maximum permeability of iron, reduce coercivity, core loss
(iron loss) and magnetic aging.Annealing is a kind of metal heating processing technology, refers to for metal being heated slowly to certain temperature, is kept
Enough time, it is then cooling with Reasonable Speed.Purpose is to reduce hardness, improves machinability;Residual stress is eliminated, ruler is stablized
It is very little, reduce deformation and crackle tendency;Crystal grain is refined, tissue is adjusted, eliminates tissue defects.Exactly, annealing is a kind of pair of material
The heat treatment process of material, including metal material, nonmetallic materials.And the annealing purpose of new material is also deposited with conventional metals annealing
In the similarities and differences.Silicon steel sheet is made annealing treatment in process, and the effect of annealing directly influences the property of silicon steel sheet
Energy.
Summary of the invention
The purpose of the present invention is to provide the annealing process after a kind of non-directional cold-rolling silicon steel disc cold rolling, this is orientation-free cold-rolled
Specific step is as follows for annealing process after silicon steel sheet cold rolling:
S1: annealing furnace carried out the pre-heat treatment before the annealing for carrying out silicon steel sheet, before silicon steel sheet is put into, the preheating of annealing furnace
The temperature reached is 400-500 DEG C；
S2: the semi-finished product silicon steel sheet after cold rolling in silicon steel sheet manufacturing process is subjected to first time annealing, by silicon steel sheet
It is put into annealing furnace, the temperature of annealing furnace is quickly heated between 600-650 DEG C by the heating of annealing furnace, and annealing furnace quickly rises
The time of temperature controlled within 30 seconds；
S3: nitrogen is added into annealing furnace for the manufacture of the nitrogen atmosphere in annealing furnace, so that contain nitrogen in annealing furnace,
The annealing under nitrogen containing atmosphere is carried out, annealing time is 30-45 minutes；
S4: the cooling processing after primary annealing closes annealing furnace, the water circulation cooling system of annealing furnace is opened, to moving back
Fast cooling is melted down, is carried out by the way of silicon steel sheet descent of temperature, when the temperature of silicon steel sheet is reduced to 50-100 DEG C
Silicon steel sheet is taken out, an annealing process is completed；
S5: will carry out the silicon steel sheet after once making annealing treatment and carry out secondary cold-rolling processing, the silicon steel sheet after secondary cold-rolling into
Row double annealing processing；
S6: the silicon steel sheet after secondary cold-rolling carries out double annealing processing, carries out the pre-heat treatment to annealing furnace before double annealing,
Annealing furnace temperature after preheating controls between 600-650 DEG C；
S7: when double annealing in furnace hydrogeneous nitrogen atmosphere manufacture, only hydrogen and nitrogen gas atmosphere in furnace when double annealing, without free
Gas.
S8: the temperature in annealing furnace is quickly raised between 800-850 DEG C by the quick raising of temperature in annealing furnace,
Double annealing processing is carried out, annealing time controlled between 25-30 minutes, until annealing is completed；
S9: the cooling processing of silicon steel sheet is cooled down to the silicon steel sheet after double annealing, is carried out by the way of cooling oil
The fast cooling of silicon steel sheet, until the temperature of silicon steel sheet, which is reduced between 30-50 DEG C, can be completed the cold cooling of oil；
S10: being put into lye for silicon steel sheet is cleaned in the alkali cleaning of silicon steel sheet after cooling, the temperature control of lye
Between 60-70 DEG C；
S11: silicon steel sheet is dried in the drying and processing of silicon steel sheet, is done by the way of air-heater air blast
Dry processing.
It is 80% that nitrogen gas concn when making annealing treatment for the first time in the step S3 in annealing furnace, which is content, so that silicon steel sheet
Stabilizing annealing is handled under this atmosphere.
It is all nitrogen and hydrogen in annealing furnace in the step S7 in second of annealing, the gas of the hydrogen accounts for
The gas volume fractions of nitrogen are 2-8%.
In the step S9 use cooling oil cool down in cooling oil for anneal profession cooling oil.
Lye in the step S10 is sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 10-20%.
Compared with prior art, the beneficial effects of the present invention are: the present invention by the way of twice annealing process come to silicon
Steel disc is heat-treated, while temperature when twice annealing process and furnace atmosphere are all made of different modes, so as to big
The big thermal effectiveness for improving silicon steel sheet.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Embodiment 1
A kind of annealing process after non-directional cold-rolling silicon steel disc cold rolling, the lehr attendant after the non-directional cold-rolling silicon steel disc cold rolling
Specific step is as follows for skill:
S1: annealing furnace carried out the pre-heat treatment before the annealing for carrying out silicon steel sheet, before silicon steel sheet is put into, the preheating of annealing furnace
The temperature reached is 400 DEG C；
S2: the semi-finished product silicon steel sheet after cold rolling in silicon steel sheet manufacturing process is subjected to first time annealing, by silicon steel sheet
It is put into annealing furnace, the temperature of annealing furnace is quickly heated to 600 DEG C, the time that annealing furnace is rapidly heated by the heating of annealing furnace
Control is within 30 seconds；
S3: nitrogen is added into annealing furnace for the manufacture of the nitrogen atmosphere in annealing furnace, so that contain nitrogen in annealing furnace,
The annealing under nitrogen containing atmosphere is carried out, annealing time is 30 minutes；
S4: the cooling processing after primary annealing closes annealing furnace, the water circulation cooling system of annealing furnace is opened, to moving back
Fast cooling is melted down, is carried out by the way of silicon steel sheet descent of temperature, it, can be by silicon when the temperature of silicon steel sheet is reduced to 50 DEG C
Steel disc takes out, and completes an annealing process；
S5: will carry out the silicon steel sheet after once making annealing treatment and carry out secondary cold-rolling processing, the silicon steel sheet after secondary cold-rolling into
Row double annealing processing；
S6: the silicon steel sheet after secondary cold-rolling carries out double annealing processing, carries out the pre-heat treatment to annealing furnace before double annealing,
Annealing furnace temperature after preheating is controlled at 600 DEG C；
S7: when double annealing in furnace hydrogeneous nitrogen atmosphere manufacture, only hydrogen and nitrogen gas atmosphere in furnace when double annealing, without free
Gas；
S8: the temperature in annealing furnace is quickly raised to 800 DEG C, carried out secondary by the quick raising of temperature in annealing furnace
Annealing, annealing time were controlled at 25 minutes, until annealing is completed；
S9: the cooling processing of silicon steel sheet is cooled down to the silicon steel sheet after double annealing, is carried out by the way of cooling oil
The fast cooling of silicon steel sheet, until the temperature of silicon steel sheet is reduced to 30 DEG C the cold cooling of oil can be completed；
S10: being put into lye for silicon steel sheet is cleaned in the alkali cleaning of silicon steel sheet after cooling, the temperature control of lye
At 60 DEG C；
S11: silicon steel sheet is dried in the drying and processing of silicon steel sheet, is done by the way of air-heater air blast
Dry processing.
It is 80% that nitrogen gas concn when making annealing treatment for the first time in the step S3 in annealing furnace, which is content, so that silicon steel sheet
Stabilizing annealing is handled under this atmosphere.
It is all nitrogen and hydrogen in annealing furnace in the step S7 in second of annealing, the gas of the hydrogen accounts for
The gas volume fractions of nitrogen are 2%.
In the step S9 use cooling oil cool down in cooling oil for anneal profession cooling oil.
Lye in the step S10 is sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 10%.
Embodiment 2
A kind of annealing process after non-directional cold-rolling silicon steel disc cold rolling, the lehr attendant after the non-directional cold-rolling silicon steel disc cold rolling
Specific step is as follows for skill:
S1: annealing furnace carried out the pre-heat treatment before the annealing for carrying out silicon steel sheet, before silicon steel sheet is put into, the preheating of annealing furnace
The temperature reached is 450 DEG C；
S2: the semi-finished product silicon steel sheet after cold rolling in silicon steel sheet manufacturing process is subjected to first time annealing, by silicon steel sheet
It is put into annealing furnace, the temperature of annealing furnace is quickly heated to 620 DEG C, the time that annealing furnace is rapidly heated by the heating of annealing furnace
Control is within 30 seconds；
S3: nitrogen is added into annealing furnace for the manufacture of the nitrogen atmosphere in annealing furnace, so that contain nitrogen in annealing furnace,
The annealing under nitrogen containing atmosphere is carried out, annealing time is 38 minutes；
S4: the cooling processing after primary annealing closes annealing furnace, the water circulation cooling system of annealing furnace is opened, to moving back
Fast cooling is melted down, is carried out by the way of silicon steel sheet descent of temperature, it, can be by silicon when the temperature of silicon steel sheet is reduced to 75 DEG C
Steel disc takes out, and completes an annealing process；
S5: will carry out the silicon steel sheet after once making annealing treatment and carry out secondary cold-rolling processing, the silicon steel sheet after secondary cold-rolling into
Row double annealing processing；
S6: the silicon steel sheet after secondary cold-rolling carries out double annealing processing, carries out the pre-heat treatment to annealing furnace before double annealing,
Annealing furnace temperature after preheating is controlled at 620 DEG C；
S7: when double annealing in furnace hydrogeneous nitrogen atmosphere manufacture, only hydrogen and nitrogen gas atmosphere in furnace when double annealing, without free
Gas.
S8: the temperature in annealing furnace is quickly raised to 825 DEG C, carried out secondary by the quick raising of temperature in annealing furnace
Annealing, annealing time were controlled at 28 minutes, until annealing is completed；
S9: the cooling processing of silicon steel sheet is cooled down to the silicon steel sheet after double annealing, is carried out by the way of cooling oil
The fast cooling of silicon steel sheet, until the temperature of silicon steel sheet is reduced to 40 DEG C the cold cooling of oil can be completed；
S10: being put into lye for silicon steel sheet is cleaned in the alkali cleaning of silicon steel sheet after cooling, the temperature control of lye
At 65 DEG C；
S11: silicon steel sheet is dried in the drying and processing of silicon steel sheet, is done by the way of air-heater air blast
Dry processing.
It is 80% that nitrogen gas concn when making annealing treatment for the first time in the step S3 in annealing furnace, which is content, so that silicon steel sheet
Stabilizing annealing is handled under this atmosphere.
It is all nitrogen and hydrogen in annealing furnace in the step S7 in second of annealing, the gas of the hydrogen accounts for
The gas volume fractions of nitrogen are 6%.
In the step S9 use cooling oil cool down in cooling oil for anneal profession cooling oil.
Lye in the step S10 is sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 15%.
Embodiment 3
A kind of annealing process after non-directional cold-rolling silicon steel disc cold rolling, the lehr attendant after the non-directional cold-rolling silicon steel disc cold rolling
Specific step is as follows for skill:
S1: annealing furnace carried out the pre-heat treatment before the annealing for carrying out silicon steel sheet, before silicon steel sheet is put into, the preheating of annealing furnace
The temperature reached is 500 DEG C；
S2: the semi-finished product silicon steel sheet after cold rolling in silicon steel sheet manufacturing process is subjected to first time annealing, by silicon steel sheet
It is put into annealing furnace, the temperature of annealing furnace is quickly heated to 650 DEG C, the time that annealing furnace is rapidly heated by the heating of annealing furnace
Control is within 30 seconds；
S3: nitrogen is added into annealing furnace for the manufacture of the nitrogen atmosphere in annealing furnace, so that contain nitrogen in annealing furnace,
The annealing under nitrogen containing atmosphere is carried out, annealing time is 45 minutes；
S4: the cooling processing after primary annealing closes annealing furnace, the water circulation cooling system of annealing furnace is opened, to moving back
Fast cooling is melted down, is carried out by the way of silicon steel sheet descent of temperature, when the temperature of silicon steel sheet is reduced to 100 DEG C, can be incited somebody to action
Silicon steel sheet takes out, and completes an annealing process；
S5: will carry out the silicon steel sheet after once making annealing treatment and carry out secondary cold-rolling processing, the silicon steel sheet after secondary cold-rolling into
Row double annealing processing；
S6: the silicon steel sheet after secondary cold-rolling carries out double annealing processing, carries out the pre-heat treatment to annealing furnace before double annealing,
Annealing furnace temperature after preheating is controlled at 650 DEG C；
S7: when double annealing in furnace hydrogeneous nitrogen atmosphere manufacture, only hydrogen and nitrogen gas atmosphere in furnace when double annealing, without free
Gas；
S8: the temperature in annealing furnace is quickly raised to 850 DEG C, carried out secondary by the quick raising of temperature in annealing furnace
Annealing, annealing time were controlled at 30 minutes, until annealing is completed；
S9: the cooling processing of silicon steel sheet is cooled down to the silicon steel sheet after double annealing, is carried out by the way of cooling oil
The fast cooling of silicon steel sheet, until the temperature of silicon steel sheet is reduced to 50 DEG C the cold cooling of oil can be completed；
S10: being put into lye for silicon steel sheet is cleaned in the alkali cleaning of silicon steel sheet after cooling, the temperature control of lye
At 70 DEG C；
S11: silicon steel sheet is dried in the drying and processing of silicon steel sheet, is done by the way of air-heater air blast
Dry processing.
It is 80% that nitrogen gas concn when making annealing treatment for the first time in the step S3 in annealing furnace, which is content, so that silicon steel sheet
Stabilizing annealing is handled under this atmosphere.
It is all nitrogen and hydrogen in annealing furnace in the step S7 in second of annealing, the gas of the hydrogen accounts for
The gas volume fractions of nitrogen are 8%.
In the step S9 use cooling oil cool down in cooling oil for anneal profession cooling oil.
Lye in the step S10 is sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 20%.
The present invention is heat-treated silicon steel sheet by the way of twice annealing process, while when twice annealing process
Temperature and furnace atmosphere are all made of different modes, so as to greatly improve the thermal effectiveness of silicon steel sheet.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. the annealing process after a kind of non-directional cold-rolling silicon steel disc cold rolling, it is characterised in that: the non-directional cold-rolling silicon steel disc cold rolling
Specific step is as follows for annealing process afterwards:
S1: annealing furnace carried out the pre-heat treatment before the annealing for carrying out silicon steel sheet, and before silicon steel sheet is put into, the preheating of annealing furnace reaches
Temperature be 400-500 DEG C；
S2: the semi-finished product silicon steel sheet after cold rolling in silicon steel sheet manufacturing process is subjected to first time annealing, silicon steel sheet is put into
The temperature of annealing furnace is quickly heated between 600-650 DEG C by annealing furnace, the heating of annealing furnace, what annealing furnace was rapidly heated
Time controlled within 30 seconds；
S3: nitrogen is added into annealing furnace for the manufacture of the nitrogen atmosphere in annealing furnace, so that containing nitrogen in annealing furnace, carries out
Annealing under nitrogen containing atmosphere, annealing time are 30-45 minutes；
S4: the cooling processing after primary annealing closes annealing furnace, the water circulation cooling system of annealing furnace is opened, to retracting furnace
Fast cooling is carried out by the way of silicon steel sheet descent of temperature, can be by silicon when the temperature of silicon steel sheet is reduced to 50-100 DEG C
Steel disc takes out, and completes an annealing process；
S5: the silicon steel sheet after once making annealing treatment will be carried out and carry out secondary cold-rolling processing, the silicon steel sheet after secondary cold-rolling carries out two
Secondary annealing；
S6: the silicon steel sheet after secondary cold-rolling carries out double annealing processing, carries out the pre-heat treatment, preheating to annealing furnace before double annealing
Annealing furnace temperature afterwards controls between 600-650 DEG C；
S7: when double annealing in furnace hydrogeneous nitrogen atmosphere manufacture, only hydrogen and nitrogen gas atmosphere in furnace, does not contain air when double annealing；
S8: the temperature in annealing furnace is quickly raised between 800-850 DEG C by the quick raising of temperature in annealing furnace, is carried out
Double annealing processing, annealing time controlled between 25-30 minutes, until annealing is completed；
S9: the cooling processing of silicon steel sheet is cooled down to the silicon steel sheet after double annealing, silicon steel is carried out by the way of cooling oil
The fast cooling of piece, until the temperature of silicon steel sheet, which is reduced between 30-50 DEG C, can be completed the cold cooling of oil；
S10: being put into lye for silicon steel sheet is cleaned in the alkali cleaning of silicon steel sheet after cooling, and the temperature of lye is controlled in 60-
Between 70 DEG C；
S11: silicon steel sheet is dried in the drying and processing of silicon steel sheet, and place is dried by the way of air-heater air blast
Reason.
2. the annealing process after a kind of non-directional cold-rolling silicon steel disc cold rolling according to claim 1, it is characterised in that: described
Nitrogen gas concn when making annealing treatment for the first time in step S3 in annealing furnace is that content is 80%, so that silicon steel sheet is steady under this atmosphere
Fixed annealing.
3. the annealing process after a kind of non-directional cold-rolling silicon steel disc cold rolling according to claim 1, it is characterised in that: described
It is all nitrogen and hydrogen in annealing furnace in step S7 in second of annealing, the gas of the hydrogen accounts for the gas body of nitrogen
Product ratio is 2-8%.
4. the annealing process after a kind of non-directional cold-rolling silicon steel disc cold rolling according to claim 1, it is characterised in that: described
In step S9 use cooling oil cool down in cooling oil for anneal profession cooling oil.
5. the annealing process after a kind of non-directional cold-rolling silicon steel disc cold rolling according to claim 1, it is characterised in that: described
Lye in step S10 is sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 10-20%.
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| CN107385178B (en) * | 2017-07-18 | 2019-04-23 | 浙江华赢特钢科技有限公司 | A kind of annealing process of improved non-directional cold-rolling silicon steel disc |
| CN110293375A (en) * | 2019-07-02 | 2019-10-01 | 浙江百润轴承有限公司 | A kind of production technology of thin-wall bearing |
| CN111020150B (en) * | 2019-08-14 | 2021-03-09 | 钢铁研究总院 | Method for preparing ultrathin silicon steel by low-temperature step-by-step annealing |
| CN111118273A (en) * | 2019-12-21 | 2020-05-08 | 包头市威丰稀土电磁材料股份有限公司 | Production process of oriented silicon steel thin strip |
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| WO1997022723A1 (en) * | 1995-12-19 | 1997-06-26 | Pohang Iron & Steel Co., Ltd. | Process for producing nondirectional electrical steel sheet excellent in close adhesion of insulating film |
| CN1982483A (en) * | 2005-12-16 | 2007-06-20 | 上海申群物资有限公司 | Production of non-directional cold-rolling silicon steel disc |
| CN102634729A (en) * | 2012-04-01 | 2012-08-15 | 首钢总公司 | Preparation method for low-iron-loss, high-induction and high-mark non-oriented silicon steel |
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