CN107354377A - A kind of high magnetic strength hot-rolled orientation silicon steel steel plate and its production technology - Google Patents
A kind of high magnetic strength hot-rolled orientation silicon steel steel plate and its production technology Download PDFInfo
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- CN107354377A CN107354377A CN201710495174.3A CN201710495174A CN107354377A CN 107354377 A CN107354377 A CN 107354377A CN 201710495174 A CN201710495174 A CN 201710495174A CN 107354377 A CN107354377 A CN 107354377A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 85
- 239000010959 steel Substances 0.000 title claims abstract description 85
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 55
- 238000005516 engineering process Methods 0.000 title claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims abstract description 52
- 238000009749 continuous casting Methods 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims description 8
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000010583 slow cooling Methods 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 230000006698 induction Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 238000004134 energy conservation Methods 0.000 description 4
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- 241000277275 Oncorhynchus mykiss Species 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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Abstract
The present invention relates to a kind of high magnetic strength hot-rolled orientation silicon steel steel plate and its production technology, the chemical composition of high magnetic strength hot-rolled orientation silicon steel are as follows：Calculate by percentage to the quality, C ＜ 0.1%, Si：3.0~5.0%, Mn：0.05~0.20%, P：0.02~0.030%, S：0.005~0.009%, Al：0.00255~0.0284%, Ti≤0.002%, surplus are Fe and inevitable impurity.The production technology includes：Continuous casting steel billet feeding heating furnace is heated；The slab that heating furnace is sent out is subjected to thick dephosphorization, pressure fixed width, roughing, smart dephosphorization, finish rolling, section cooling successively and batched.The production technology is easy to batch steady production, and process costs are relatively low, and the high magnetic strength hot-rolled orientation silicon steel steel plate obtained can meet the size requirement of performance requirements of the finished product magnetic strength B800 more than 1.9T, lateral thickness difference less than 10 μm.
Description
Technical field
The present invention relates to metallurgical technology field, more particularly to a kind of high magnetic strength hot-rolled orientation silicon steel steel plate and its production work
Skill.
Background technology
The environmentally friendly call of green energy resource is built to realize that country establishes, the orientation silicon steel applied to extra-high voltage transformer is progressively
Break traditional hot-rolled high production technology, start the low temperature process conversion to efficient energy-saving.Hot-rolled orientation silicon steel is producing
Technique and technology need to meet that performance requirements of the high magnetic induction grain-oriented silicon steel finished product magnetic strength B800 more than 1.9T, lateral thickness difference are less than 10
μm size requirement and energy-saving production requirement.
Production technology of the prior art can not meet high magnetic induction grain-oriented silicon steel hot rolling raw material in performance, size and energy-saving square
The requirement in face.
The content of the invention
The invention provides a kind of high magnetic strength hot-rolled orientation silicon steel steel plate and its production technology, solves or part solves
Production technology of the prior art can not meet requirement of the high magnetic induction grain-oriented silicon steel hot rolling raw material in terms of performance, size and energy-conservation
Technical problem, realize and be easy to batch steady production, process costs are relatively low, and obtain high magnetic strength hot-rolled orientation silicon steel steel plate
The technique effect of the size requirement of performance requirements of the finished product magnetic strength B800 more than 1.9T, lateral thickness difference less than 10 μm can be met.
A kind of high magnetic strength hot-rolled orientation silicon steel steel plate provided by the invention, the high magnetic strength hot-rolled orientation silicon steel chemistry into
Divide as follows：Calculate by percentage to the quality, C ＜ 0.1%, Si：3.0~5.0%, Mn：0.05~0.20%, P：0.02~
0.030%th, S：0.005~0.009%, Al：0.00255~0.0284%, Ti≤0.002%, surplus is for Fe and unavoidably
Impurity.
Preferably, the chemical composition of the high magnetic strength hot-rolled orientation silicon steel is as follows：Calculate by percentage to the quality, C：
0.050~0.058%, Si：3.1~3.4%, Mn：0.09~0.11%, P：0.02~0.030%, S：0.005~
0.009%th, Al：0.00255~0.0284%, Ti≤0.002%, surplus are Fe and inevitable impurity.
Preferably, the thickness of the continuous casting steel billet of the high magnetic strength hot-rolled orientation silicon steel steel plate is 180~250mm；
The thickness of the intermediate slab of the high magnetic strength hot-rolled orientation silicon steel steel plate is 35~45mm；
The thickness of the production board of the high magnetic strength hot-rolled orientation silicon steel steel plate is 1.6~4mm.
Preferably, the thickness of the continuous casting steel billet of the high magnetic strength hot-rolled orientation silicon steel steel plate is 230mm；
The thickness of the intermediate slab of the high magnetic strength hot-rolled orientation silicon steel steel plate is 40mm；
The thickness of the production board of the high magnetic strength hot-rolled orientation silicon steel steel plate is 2.5mm.
Based on same inventive concept, present invention also provides a kind of production work of high magnetic strength hot-rolled orientation silicon steel steel plate
Skill, for producing the high magnetic strength hot-rolled orientation silicon steel steel plate, comprise the following steps：
Continuous casting steel billet feeding heating furnace is heated；The temperature of the addition heating furnace of the continuous casting steel billet is more than etc.
In 250 DEG C；
It is cold that the slab that the heating furnace is sent out carries out thick dephosphorization, pressure fixed width, roughing, smart dephosphorization, finish rolling, laminar flow successively
But and batch；Intermediate slab is obtained after the completion of the roughing；Production board is obtained after the completion of the finish rolling；
The slab is come out of the stove to the Wen Duxiajiang that the roughing is completed less than or equal to 140 DEG C；It is described at the end of the roughing
The temperature of intermediate slab is more than or equal to 1010 DEG C；The reduction ratio of the roughing is more than or equal to 80%；
When the roughing is accomplished to the finish rolling and started, the Wen Duxiajiang of the intermediate slab is less than or equal to 20 DEG C；
At the end of the finish rolling starts to the finish rolling, the Wen Duxiajiang of the intermediate slab is less than or equal to 80 DEG C；
The coiling temperature is 500~600 DEG C.
Preferably, the detailed process for carrying out the thick dephosphorization, the pressure fixed width and the roughing is：
The slab is carried out successively after coming out of the stove：Thick dephosphorization, constant width machine progress pressure fixed width, R1 dephosphorization, E1, R1 roughing mill enter
Row roughing, R2 dephosphorization, E2, R2 roughing mill carry out roughing.
Preferably, the roughing number of E1, R1 roughing mill is 1 passage；
The roughing number of E2, R2 roughing mill is 3 passages.
Preferably, E2, R2 roughing mill carries out obtaining the intermediate slab after the completion of roughing；
Before the intermediate slab carries out smart dephosphorization, the intermediate slab on roller-way is incubated by stay-warm case；
Wherein, the intermediate slab conveyed since the roller-way between the finish rolling E2, R2 roughing mill passes out to
Cheng Zhong, the Wen Duxiajiang of the intermediate slab are less than or equal to 20 DEG C.
Preferably, being incubated by the continuous casting steel billet offline rear straight dress, stacking slow cooling and holding pit, make the continuous casting plate
The temperature of the addition heating furnace of base is more than or equal to 250 DEG C.
Preferably, during the finish rolling, head threading 11~12m/s of speed limiting of the intermediate slab, acceleration is most
Big amplitude limit is 0.2m/s2。
One or more technical schemes provided herein, have at least the following technical effects or advantages：
Temperature is controlled as a result of core of the end temp as full technique is rolled using roughing, by entering to hot rolling each operation
The rational processing parameter setting of row, the rolling mill practice of slab include thick dephosphorization, pressure fixed width, roughing, smart dephosphorization, finish rolling, laminar flow
Cool down and batch；The temperature of the addition heating furnace of continuous casting steel billet is more than or equal to 250 DEG C, at a temperature of slab is come out of the stove to roughing completion
Drop is less than or equal to 140 DEG C；At the end of roughing, the temperature of intermediate slab is more than or equal to 1010 DEG C；The reduction ratio of roughing is more than or equal to
80%；When roughing is accomplished to finish rolling and started, the Wen Duxiajiang of intermediate slab is less than or equal to 20 DEG C；Finish rolling starts to finish rolling to terminate
When, the Wen Duxiajiang of intermediate slab is less than or equal to 80 DEG C；Coiling temperature is 500~600 DEG C, and it is low temperature work to ensure the production technology
Skill, not only have the function that energy-saving, moreover it is possible to batch it is stable produce high magnetic strength hot-rolled orientation silicon steel steel plate, and steel plate into
Product can meet user to the size requirement of performance requirements of the steel plate magnetic strength B800 more than 1.9T, lateral thickness difference less than 10 μm.So,
Efficiently solving production technology of the prior art can not meet high magnetic induction grain-oriented silicon steel hot rolling raw material in performance, size and energy-conservation
The technical problem of the requirement of aspect, realize and be easy to batch steady production, process costs are relatively low, and the high magnetic strength hot rolling obtained takes
The skill of the size requirement of performance requirements of the finished product magnetic strength B800 more than 1.9T, lateral thickness difference less than 10 μm can be met to silicon steel steel plate
Art effect.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the production technology of high magnetic strength hot-rolled orientation silicon steel steel plate provided by the invention.
Embodiment
The embodiment of the present application provides a kind of high magnetic strength hot-rolled orientation silicon steel steel plate and its production technology, solves or part
Solving production technology of the prior art can not meet high magnetic induction grain-oriented silicon steel hot rolling raw material in terms of performance, size and energy-conservation
Requirement technical problem, realize and be easy to batch steady production, process costs are relatively low, and obtain high magnetic strength hot-rolled orientation silicon
Steel steel plate can meet the technology effect of the size requirement of performance requirements of the finished product magnetic strength B800 more than 1.9T, lateral thickness difference less than 10 μm
Fruit.
A kind of high magnetic strength hot-rolled orientation silicon steel steel plate provided by the invention, the chemical composition of high magnetic strength hot-rolled orientation silicon steel is such as
Under：Calculate by percentage to the quality, C ＜ 0.1%, Si：3.0~5.0%, Mn：0.05~0.20%, P：0.02~0.030%, S：
0.005~0.009%, Al：0.00255~0.0284%, Ti≤0.002%, surplus are Fe and inevitable impurity.Gao Ci
The thickness for feeling the continuous casting steel billet of hot-rolled orientation silicon steel steel plate is 180~250mm；The intermediate plate of high magnetic strength hot-rolled orientation silicon steel steel plate
The thickness of base is 35~45mm；The thickness of the production board of high magnetic strength hot-rolled orientation silicon steel steel plate is 2~4mm.
As a kind of preferred embodiment, the chemical composition of high magnetic strength hot-rolled orientation silicon steel is as follows：By percentage to the quality
Calculate, C：0.050~0.058%, Si：3.1~3.4%, Mn：0.09~0.11%, P：0.02~0.030%, S：0.005~
0.009%th, Al：0.00255~0.0284%, Ti≤0.002%, surplus are Fe and inevitable impurity.High magnetic strength hot rolling
The thickness of the continuous casting steel billet of orientation silicon steel steel plate is 230mm；The thickness of the intermediate slab of high magnetic strength hot-rolled orientation silicon steel steel plate is
40mm；The thickness of the production board of high magnetic strength hot-rolled orientation silicon steel steel plate is 2.5mm.
Based on same inventive concept, present invention also provides a kind of production work of high magnetic strength hot-rolled orientation silicon steel steel plate
Skill, for producing the high magnetic strength hot-rolled orientation silicon steel steel plate, comprise the following steps：
S1：Continuous casting steel billet feeding heating furnace is heated；The temperature of the addition heating furnace of continuous casting steel billet is more than or equal to 250
℃；It is incubated by continuous casting steel billet offline rear straight dress, stacking slow cooling and holding pit, makes the temperature of the addition heating furnace of continuous casting steel billet big
In equal to 250 DEG C.
S2：It is cold that the slab that heating furnace is sent out is subjected to thick dephosphorization, pressure fixed width, roughing, smart dephosphorization, finish rolling, laminar flow successively
But and batch；Intermediate slab is obtained after the completion of roughing；Production board is obtained after the completion of finish rolling；Slab is come out of the stove to the temperature of roughing completion
It is dropped by less than being equal to 140 DEG C；The temperature of intermediate slab is more than or equal to 1010 DEG C at the end of roughing；The reduction ratio of roughing is more than or equal to
80%；When roughing is accomplished to finish rolling and started, the Wen Duxiajiang of intermediate slab is less than or equal to 20 DEG C；Finish rolling starts to finish rolling to terminate
When, the Wen Duxiajiang of intermediate slab is less than or equal to 80 DEG C；Coiling temperature is 500~600 DEG C.
Wherein, the production technology rolls core of the end temp as full technique using roughing and controls temperature, by each to hot rolling
Process carries out rational processing parameter setting, and it be low temperature process to ensure the production technology, not only have the function that it is energy-saving, and also
What can be stablized in batches produces high magnetic strength hot-rolled orientation silicon steel steel plate, and steel plate finished product can meet that user is big to steel plate magnetic strength B800
The size requirement of performance requirement, lateral thickness difference less than 10 μm in 1.9T.
Further, the detailed process for carrying out thick dephosphorization, pressure fixed width and roughing is：Slab is carried out successively after coming out of the stove：Slightly
Dephosphorization, constant width machine carry out pressure fixed width, R1 dephosphorization, E1, R1 roughing mill progress roughing, R2 dephosphorization, the progress of E2, R2 roughing mill slightly
Roll.The thick row's descaling header of de-scaling two realizes individually control, only opens the single descaling header of entrance.Roughing pattern is：E1, R1 roughing
The roughing number of machine is 1 passage；The roughing number of E2, R2 roughing mill is 3 passages.Pass through thick descaling header Valve controlling, roughing
The temperature drop that Schema control terminates to realize slab to come out of the stove to roughing rolling is no more than 140 DEG C.
Further, E2, R2 roughing mill carry out obtaining intermediate slab after the completion of roughing；Intermediate slab carry out smart dephosphorization it
Before, the intermediate slab on roller-way is incubated by stay-warm case；Wherein, intermediate slab is since passing out to E2, R2 roughing mill
In roller-way course of conveying between finish rolling, the Wen Duxiajiang of intermediate slab is less than or equal to 20 DEG C.
Further, during finish rolling, head threading 11~12m/s of speed limiting of intermediate slab, acceleration maximum amplitude limit is
0.2m/s2, on the one hand ensure that finish rolling region temperature drop is no more than 80 DEG C by above-mentioned control, while strip steel head template is straight.
The production of the high magnetic strength hot-rolled orientation silicon steel steel plate of the application offer is provided below by specific embodiment
Technique and its hot-rolled orientation silicon steel steel plate of acquisition：
Embodiment one
Technique：Continuous casting steel billet feeding heating furnace is heated；The temperature of the addition heating furnace of continuous casting steel billet is 255 DEG C；
The slab that heating furnace is sent out is subjected to thick dephosphorization, constant width machine progress pressure fixed width, R1 dephosphorization, the progress of E1, R1 roughing mill slightly successively
Roll, R2 dephosphorization, E2, R2 roughing mill carry out roughing, smart dephosphorization, finish rolling, section cooling and batch；Intermediate plate is obtained after the completion of roughing
Base；Production board is obtained after the completion of finish rolling；Realize that slab is come out of the stove to thick by thick descaling header Valve controlling, roughing Schema control
Roll 110 DEG C of the temperature drop terminated, roughing 1020 DEG C of end temp of rolling；The reduction ratio of roughing is equal to 86%；Roughing is accomplished to
When finish rolling starts, before intermediate slab carries out smart dephosphorization, the intermediate slab on roller-way is incubated by stay-warm case, intermediate plate
10 DEG C of the Wen Duxiajiang of base.During finish rolling, the head threading speed limiting 11m/s of intermediate slab, acceleration maximum amplitude limit is 0.2m/
s2, 72 DEG C of the Wen Duxiajiang of intermediate slab；938 DEG C of the temperature of production board when finish rolling is completed；Section cooling pattern uses leading portion
Intensive refrigerating mode, every group of cooling manifold is using 4 groups of upper header and the patterns of 4 groups of unlatchings simultaneously of lower collector pipe.Coiling temperature is 510
℃。
The chemical constituent of the production board of acquisition is：Calculate by percentage to the quality, C：0.052%th, Si：3.2%th, Mn：
0.09%th, P：0.025%th, S：0.007%th, Al：0.00259%th, Ti：0.0018%, surplus is Fe and inevitable impurity.
The thickness of continuous casting steel billet is 230mm；The thickness of intermediate slab is 38mm；The thickness of production board is 2.5mm.
Embodiment two
Technique：Continuous casting steel billet feeding heating furnace is heated；The temperature of the addition heating furnace of continuous casting steel billet is 462 DEG C；
The slab that heating furnace is sent out is subjected to thick dephosphorization, constant width machine progress pressure fixed width, R1 dephosphorization, the progress of E1, R1 roughing mill slightly successively
Roll, R2 dephosphorization, E2, R2 roughing mill carry out roughing, smart dephosphorization, finish rolling, section cooling and batch；Intermediate plate is obtained after the completion of roughing
Base；Production board is obtained after the completion of finish rolling；Realize that slab is come out of the stove to thick by thick descaling header Valve controlling, roughing Schema control
Roll 105 DEG C of the temperature drop terminated, roughing 1025 DEG C of end temp of rolling；The reduction ratio 90% of roughing；Roughing is accomplished to finish rolling
During beginning, before intermediate slab carries out smart dephosphorization, the intermediate slab on roller-way is incubated by stay-warm case, intermediate slab
Temperature declines 15 DEG C.During finish rolling, the head threading speed limiting 12m/s of intermediate slab, acceleration maximum amplitude limit is 0.2m/s2,
75 DEG C of the Wen Duxiajiang of intermediate slab；935 DEG C of the temperature of production board when finish rolling is completed；Section cooling pattern is intensive using leading portion
Refrigerating mode, every group of cooling manifold is using 4 groups of upper header and the patterns of 4 groups of unlatchings simultaneously of lower collector pipe.Coiling temperature is 550 DEG C.
The chemical constituent of the production board of acquisition is：Calculate by percentage to the quality, C：0.054%th, Si：3.4%th, Mn：
0.1%th, P：0.02%th, S：0.008%th, Al：0.00262%th, Ti：0.0018%, surplus is Fe and inevitable impurity.Even
The thickness of cast panel base is 235mm；The thickness of intermediate slab is 42mm；The thickness of production board is 2.3mm.
Embodiment three
Technique：Continuous casting steel billet feeding heating furnace is heated；The temperature of the addition heating furnace of continuous casting steel billet is 568 DEG C；
The slab that heating furnace is sent out is subjected to thick dephosphorization, constant width machine progress pressure fixed width, R1 dephosphorization, the progress of E1, R1 roughing mill slightly successively
Roll, R2 dephosphorization, E2, R2 roughing mill carry out roughing, smart dephosphorization, finish rolling, section cooling and batch；Intermediate plate is obtained after the completion of roughing
Base；Production board is obtained after the completion of finish rolling；Realize that slab is come out of the stove to thick by thick descaling header Valve controlling, roughing Schema control
Roll 120 DEG C of the temperature drop terminated, roughing 1018 DEG C of end temp of rolling；The reduction ratio 92% of roughing；Roughing is accomplished to finish rolling
During beginning, before intermediate slab carries out smart dephosphorization, the intermediate slab on roller-way is incubated by stay-warm case, intermediate slab
Temperature declines 13 DEG C.During finish rolling, the head threading speed limiting 11m/s of intermediate slab, acceleration maximum amplitude limit is 0.2m/s2,
76 DEG C of the Wen Duxiajiang of intermediate slab；929 DEG C of the temperature of production board when finish rolling is completed；Section cooling pattern is intensive using leading portion
Refrigerating mode, every group of cooling manifold is using 4 groups of upper header and the patterns of 4 groups of unlatchings simultaneously of lower collector pipe.Coiling temperature is 580 DEG C.
The chemical constituent of the production board of acquisition is：Calculate by percentage to the quality, C：0.056%th, Si：3.3%th, Mn：
0.11%th, P：0.030%th, S：0.008%th, Al：0.0280%th, Ti：0.002%, surplus is Fe and inevitable impurity.Even
The thickness 230mm of cast panel base；The thickness of intermediate slab is 40mm；The thickness of production board is 1.8mm.
One or more technical schemes provided herein, have at least the following technical effects or advantages：
Temperature is controlled as a result of core of the end temp as full technique is rolled using roughing, by entering to hot rolling each operation
The rational processing parameter setting of row, the rolling mill practice of slab include thick dephosphorization, pressure fixed width, roughing, smart dephosphorization, finish rolling, laminar flow
Cool down and batch；The temperature of the addition heating furnace of continuous casting steel billet is more than or equal to 250 DEG C, at a temperature of slab is come out of the stove to roughing completion
Drop is less than or equal to 140 DEG C；The temperature of intermediate slab is more than or equal to 1010 DEG C at the end of roughing；The reduction ratio of roughing is more than or equal to
80%；When roughing is accomplished to finish rolling and started, the Wen Duxiajiang of intermediate slab is less than or equal to 20 DEG C；Finish rolling starts to finish rolling to terminate
When, the Wen Duxiajiang of intermediate slab is less than or equal to 80 DEG C；Coiling temperature is 500~600 DEG C, and it is low temperature work to ensure the production technology
Skill, not only have the function that energy-saving, moreover it is possible to batch it is stable produce high magnetic strength hot-rolled orientation silicon steel steel plate, and steel plate into
Product can meet user to the size requirement of performance requirements of the steel plate magnetic strength B800 more than 1.9T, lateral thickness difference less than 10 μm.So,
Efficiently solving production technology of the prior art can not meet high magnetic induction grain-oriented silicon steel hot rolling raw material in performance, size and energy-conservation
The technical problem of the requirement of aspect, realize and be easy to batch steady production, process costs are relatively low, and the high magnetic strength hot rolling obtained takes
The skill of the size requirement of performance requirements of the finished product magnetic strength B800 more than 1.9T, lateral thickness difference less than 10 μm can be met to silicon steel steel plate
Art effect.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not limited to this hair
It is bright, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., it should be included in the present invention
Protection domain within.
Claims (10)
- A kind of 1. high magnetic strength hot-rolled orientation silicon steel steel plate, it is characterised in thatThe chemical composition of the high magnetic strength hot-rolled orientation silicon steel is as follows：Calculate by percentage to the quality, C ＜ 0.1%, Si：3.0~ 5.0%th, Mn：0.05~0.20%, P：0.02~0.030%, S：0.005~0.009%, Al：0.00255~0.0284%, Ti≤0.002%, surplus are Fe and inevitable impurity.
- 2. high magnetic strength hot-rolled orientation silicon steel steel plate as claimed in claim 1, it is characterised in thatThe chemical composition of the high magnetic strength hot-rolled orientation silicon steel is as follows：Calculate by percentage to the quality, C：0.050~0.058%, Si：3.1~3.4%, Mn：0.09~0.11%, P：0.02~0.030%, S：0.005~0.009%, Al：0.00255~ 0.0284%th, Ti≤0.002%, surplus are Fe and inevitable impurity.
- 3. high magnetic strength hot-rolled orientation silicon steel steel plate as claimed in claim 1, it is characterised in thatThe thickness of the continuous casting steel billet of the high magnetic strength hot-rolled orientation silicon steel steel plate is 180~250mm；The thickness of the intermediate slab of the high magnetic strength hot-rolled orientation silicon steel steel plate is 35~45mm；The thickness of the production board of the high magnetic strength hot-rolled orientation silicon steel steel plate is 1.6~4mm.
- 4. high magnetic strength hot-rolled orientation silicon steel steel plate as claimed in claim 3, it is characterised in thatThe thickness of the continuous casting steel billet of the high magnetic strength hot-rolled orientation silicon steel steel plate is 230mm；The thickness of the intermediate slab of the high magnetic strength hot-rolled orientation silicon steel steel plate is 40mm；The thickness of the production board of the high magnetic strength hot-rolled orientation silicon steel steel plate is 2.5mm.
- A kind of 5. production technology of high magnetic strength hot-rolled orientation silicon steel steel plate, for producing the height described in any one of Claims 1 to 44 Magnetic strength hot-rolled orientation silicon steel steel plate, it is characterised in that comprise the following steps：Continuous casting steel billet feeding heating furnace is heated；The temperature of the addition heating furnace of the continuous casting steel billet is more than or equal to 250℃；The slab that the heating furnace is sent out carry out successively thick dephosphorization, pressure fixed width, roughing, smart dephosphorization, finish rolling, section cooling and Batch；Intermediate slab is obtained after the completion of the roughing；Production board is obtained after the completion of the finish rolling；The slab is come out of the stove to the Wen Duxiajiang that the roughing is completed less than or equal to 140 DEG C；At the end of the roughing, the centre The temperature of slab is more than or equal to 1010 DEG C；The reduction ratio of the roughing is more than or equal to 80%；When the roughing is accomplished to the finish rolling and started, the Wen Duxiajiang of the intermediate slab is less than or equal to 20 DEG C；At the end of the finish rolling starts to the finish rolling, the Wen Duxiajiang of the intermediate slab is less than or equal to 80 DEG C；The coiling temperature is 500~600 DEG C.
- 6. the production technology of high magnetic strength hot-rolled orientation silicon steel steel plate as claimed in claim 5, it is characterised in thatThe detailed process for carrying out the thick dephosphorization, the pressure fixed width and the roughing is：The slab is carried out successively after coming out of the stove：Thick dephosphorization, constant width machine carry out pressure fixed width, R1 dephosphorization, the progress of E1, R1 roughing mill slightly Roll, R2 dephosphorization, E2, R2 roughing mill carry out roughing.
- 7. the production technology of high magnetic strength hot-rolled orientation silicon steel steel plate as claimed in claim 6, it is characterised in thatThe roughing number of E1, R1 roughing mill is 1 passage；The roughing number of E2, R2 roughing mill is 3 passages.
- 8. the production technology of high magnetic strength hot-rolled orientation silicon steel steel plate as claimed in claim 6, it is characterised in thatE2, R2 roughing mill carries out obtaining the intermediate slab after the completion of roughing；Before the intermediate slab carries out smart dephosphorization, the intermediate slab on roller-way is incubated by stay-warm case；Wherein, the intermediate slab is since the roller-way course of conveying between the finish rolling E2, R2 roughing mill passes out to, The Wen Duxiajiang of the intermediate slab is less than or equal to 20 DEG C.
- 9. the production technology of high magnetic strength hot-rolled orientation silicon steel steel plate as claimed in claim 5, it is characterised in thatIt is incubated by the continuous casting steel billet offline rear straight dress, stacking slow cooling and holding pit, described in the addition for making the continuous casting steel billet The temperature of heating furnace is more than or equal to 250 DEG C.
- 10. the production technology of high magnetic strength hot-rolled orientation silicon steel steel plate as claimed in claim 5, it is characterised in thatDuring the finish rolling, head threading 11~12m/s of speed limiting of the intermediate slab, acceleration maximum amplitude limit is 0.2m/ s2。
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| CN110340144A (en) * | 2019-07-02 | 2019-10-18 | 北京首钢股份有限公司 | A kind of hot rolling method of thin gauge ultra high silicon silicon steel |
| CN114535315A (en) * | 2022-02-08 | 2022-05-27 | 山西太钢不锈钢股份有限公司 | Process for preventing high magnetic induction oriented silicon steel from hot rolling edge crack |
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| CN114535315A (en) * | 2022-02-08 | 2022-05-27 | 山西太钢不锈钢股份有限公司 | Process for preventing high magnetic induction oriented silicon steel from hot rolling edge crack |
| CN114535315B (en) * | 2022-02-08 | 2023-10-20 | 山西太钢不锈钢股份有限公司 | Process for preventing hot rolling edge crack of high-magnetic-induction oriented silicon steel |
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