CN108637019A - A kind of production method improving non-orientation silicon steel lumber recovery - Google Patents
A kind of production method improving non-orientation silicon steel lumber recovery Download PDFInfo
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- CN108637019A CN108637019A CN201810289219.6A CN201810289219A CN108637019A CN 108637019 A CN108637019 A CN 108637019A CN 201810289219 A CN201810289219 A CN 201810289219A CN 108637019 A CN108637019 A CN 108637019A
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- steel
- silicon steel
- orientation silicon
- rolling
- lumber recovery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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Abstract
The present invention relates to a kind of production methods improving non-orientation silicon steel lumber recovery, and after intermediate base is sheared on head, into De-scaling box, calculate F1 finishing stands bites time and belt steel temperature, and finishing mill is stung steel signal and switches to rolling force mode by first-level machine L1.Each rack roll gap zero compensation gapZero values after mm finishing mill unit roll change open rolling are set into one group of initial value and applied in roll gap model.When mm finishing mill unit rolls, spread factor is added in AGC compensation models and participates in calculating control.The present invention can prevent non-orientation silicon steel hot-strip end narrowing.
Description
Technical field
The present invention relates to non-orientation silicon steel quality of production control technology fields, more particularly to a kind of raising non-orientation silicon steel
The production method of lumber recovery.
Background technology
It is well known that silicon steel manufacturing process is complicated, production difficulty is big, with high content of technology, and the manufacturing cycle is longer, is typical
Long flow product, thus its manufacturing cost gains a special interest.
To improve silicon steel product lumber recovery, in the prior art：
A kind of patent " raising orientation silicon steel of the application number CN201210002670.8 of Wuxi Hua Jing new materials Co., Ltd
Cold rolling process with cold rolling lumber recovery " proposes, connects one section on the head of the coiled oriented silicon steel band of required cold rolling and guides steel band into, institute
It states and guides the length of steel band into and be more than orientation silicon steel strip length and winder that milling train is batched on winder when starting normal cold rolling
To the sum of the spacing between roll centre；The thickness that thickness of strips is guided into width not less than the oriented silicon steel band of required cold rolling
With width；It starts uncoiler, milling train and winder and carries out cold rolling.The invention is by using guiding steel band into as cold rolling and start and tie
The primer of beam section ensures the complete complete of each passage cold-rolled process, steel taping head tail lumber recovery is orientated to improve.
The patent of the application number CN201210237500.8 of Capital Iron ＆ Steel General Co be " a kind of consideration to strip steel convexity and Edge Drop Control
Working roll and its roll contour design method " proposes that the roll shape curve equation for designing Heat Working Rolls is R (x)=b6x6+b5x5+
b4x4+b3x3+b2x2+ b1x+b0, x ∈ [0, lw].The working roll is rolled for hot-tandem unit downstream rack working roll
When silicon steel, parabola, which bears convexity segmentation, can make up roller heat convex degree learning, and conical curve segmentation, which can drop strip edge, to be controlled,
Make hot rolled silicon steel that there is good cross-sectional outling shape, to provide good plate shape condition for follow-up cold rolling, reduces silicon steel
The trimming amount of finished product, improves the lumber recovery of product.
The application number CN201310334277.3 of Shoudu Iron and Steel Co Qian'an steel Co., Ltd patent " it is a kind of improve high silicon without
The method that oriented electrical steel rolls lumber recovery ", this method includes：Before mill starts rolling, strip is preheated, strip into
When row uncoiler threading, by strip on coiling machine pre-wound, then each passes of mill successively, adjust cooling
The emulsification flow quantity of strip makes the emulsification flow velocity of the inlet of each passage of mill in 2200L/min-2500L/
Within min, the emulsification flow velocity in the exit of each passage of mill is within 1900L/min-2200L/min, strip
The exit of each passage of the mill temperature between 70 DEG C -90 DEG C.The invention is by adjusting strip two
The temperature in the exit of each passage of ten roller mills ensures that stablizing for rolling carries out between 70 DEG C -90 DEG C.
" a kind of short route high yield prepares high silicon to the patent of the application number CN201310199428.9 of University of Science ＆ Technology, Beijing
The method of electrical sheet band " proposes, more common etc. using the plastic deformation ability of directional solidification cylindrical crystalline texture high-silicon electrical steel
On the basis of axis polycrystalline alloy significantly improves this characteristic, one layer of plastic deformation is coated in column crystal high-silicon electrical steel slab both sides
The pure iron haveing excellent performance is alleviated or avoided the side in high-silicon electrical steel during mild room temperature rolling and splits problem, final to realize height
It is prepared by the short route high yield of silicon electric steel band.
The above technological invention is not in view of non-orientation silicon steel is undergone phase transition in finishing stands easily, so as to cause between rack
Steel is drawn to cause width narrowing；It does not consider by improving Hot Strip Width hit rate, especially inhibiting band steel end narrowing,
Method to improve silicon steel product lumber recovery.
Make a general survey of the full process stream journey of silicon steel manufacture, it can be seen that it is hot-rolled down to cold rolling process, especially Hot Strip Width and orders
Middle rate has conclusive effect to the size of cold-rolling pickling cutting edge amount, it is the vital of influence silicon steel product lumber recovery
Index.
Jiangsu and Zhejiang Provinces and In Guangdong Province are one of major consumers market of domestic non-orientation silicon steel, use the trade mark of non-orientation silicon steel
Including 50W800,50W600,50W1000,50W1300 etc., it is 50W800 that wherein dosage is maximum.
For Ning Gang in the producing initial stage of 50W800 steel grades, Hot Strip Width hit rate is low, and all coil of strips have head
Drawing down situation；This defect also has generation in the production of other grade non-oriented silicon steels.The present inventor hot rolling production in find,
Since the special Ultra-low carbon of non-orientation silicon steel+high silicon ingredient constitutes feature and special hot rolling technology system, completed in two-phase section
Finish rolling so that its in finishing stands there are phase transition phenomena, phase transformation cause strip deformation temperature and resistance of deformation it is accurate pre-
Survey is very difficult, and since bigger variation, tower-loop control unstability occur for resistance of deformation, roll gap is susceptible to larger deviation,
Not only cause to draw steel to cause width narrowing between rack, is also easy to cause thickness thinning, rolling stability is deteriorated.
As seen from Figure 1, peaceful steel non-orientation silicon steel producing initial stage, the wide control ability index Cpk of hot rolling plate are only -0.72, are shown
Show its process control capabilities wretched insufficiency.
It is undergone phase transition between finishing stand when due to non-orientation silicon steel hot rolling, leads to F1 racks and F2 racks in crossing process
Between draw steel, at this time kink hightension rise set；Risen after set self study is adjusted in place after kink, strip steel head by 2.5~3m of drawing down,
Through finish rolling overall process, until at F7 rack outlets, this drawing down zone length has reached 20m or so；Later strip width is transferred to normally
Value.
By daily order requirement, the specification of non-orientation silicon steel hot rolled coil be mainly 2.75~3.0 (thickness) × 1215~
1260 (width) mm, continuous casting billet are produced by long ruler base, 2.75 × 1215mm specification hot rolling full-lengths 850m；3.0×1215mm
Specification hot rolling full-length 785m.By the requirement of cold-rolling pickling unit cutting edge technique, Hot Strip Width only allows plus tolerance, needs
The width narrow rule section of every volume hot-strip 20m or so is cut off, then lumber recovery will directly reduce about 2.5%.For width specifications
For the hot-strip of 1260mm, total length is shorter, if cutting off the width narrow rule section strip steel of same length, lumber recovery is lower.
Invention content
Technical problem to be solved by the invention is to provide a kind of production methods improving non-orientation silicon steel lumber recovery, prevent
Non-orientation silicon steel hot-strip end narrowing.
The technical solution adopted by the present invention to solve the technical problems is：It provides and a kind of improving non-orientation silicon steel lumber recovery
Production method, after intermediate base is sheared on head, into De-scaling box, calculate F1 finishing stands bites time and belt steel temperature, by
Finishing mill is stung steel signal and switches to rolling force mode by first-level machine L1.
Each rack roll gap zero compensation gapZero values after mm finishing mill unit roll change open rolling are set into one group of initial value and are applied to roller
In slit die type.
Finish rolling start rolling temperature is controlled at 1000~1030 DEG C, and control slab is come out of the stove at 1140~1190 DEG C.
Heating process, de-scaling system and threading speed in curing oven reduce tension setting value between finishing stand, to improve two
Grade machine L2 model specification precision；And speed regulation function is utilized, to obviously drawing the rack of steel to carry out velocity compensation.
Heating process in curing oven of the present invention, it is ensured that board briquette is consistent between different heating heat.Meanwhile the present invention cures
De-scaling system and threading speed, tension setting value is subtracted with improving two level machine L2 model specification precision between suitably reducing finishing stand
Draw the trend of steel in slow head.Also, speed regulation function is utilized, to obviously drawing the rack of steel to carry out velocity compensation.
When mm finishing mill unit rolls, spread factor is added as compensation factor in AGC compensation models and participates in calculating control.
Advantageous effect
Due to the adoption of the above technical solution, compared with prior art, the present invention having the following advantages that and actively imitating
Fruit：
Each rack roll gap zero compensation gapZero values after mm finishing mill unit roll change open rolling are set an initial value and applied by the present invention
In roll gap model, first block of steel of open rolling draws steel, piling of steel to significantly reduce between rack, to inhibit strip steel head drawing down；And
And when mm finishing mill unit rolling, spread factor is added in AGC compensation models, significantly mitigates current AGC to rolling stability shadow
It rings, finish rolling stability significantly improves, thus strip width drawing down is greatly decreased.
Finishing mill is stung steel signal and switches to rolling force mode by the present invention, and realization accurately tracks strip steel head, is shortened anti-
The time is presented, while reducing tension setting value between finishing stand, improves L2 model specification precision, further slows down head and steel is drawn to become
Gesture.
Description of the drawings
Fig. 1 is peaceful steel hot rolling non-orientation silicon steel width accuracy control ability figure in the prior art；
Fig. 2 is the wide controlling curve figure of plate before hot rolling non-orientation silicon steel quality improvement；
Fig. 3 is the wide controlling curve figure of plate after hot rolling non-orientation silicon steel quality improvement.
Specific implementation mode
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, people in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiments of the present invention are related to a kind of production method improving non-orientation silicon steel lumber recovery, and intermediate base is cut on head
After cutting, into De-scaling box, the final setup algorithm of finishing stand starts, and calculates F1 finishing stands and bites time and belt steel temperature.
Strip steel head is accurately tracked to realize, shortens feedback time, finishing mill is stung steel signal by L1 first-level machines and switched to by the present invention
Force mode is rolled, specifically, proceeding by strip tracking by signal " strip is cut in cropping ", then continuously utilizes main transmission speed
Strip position in degree tracking traveling, when strip reaches F1 finishing stands, strip tracking is synchronized using rolling force signal.
After intermediate base is sheared on head, into De-scaling box, the final setup algorithm of finishing stand starts, when calculating F1 bites
Between and belt steel temperature.Different from existing production technology scheme, the present invention is to realize to accurately track strip steel head, when shortening feedback
Between, finishing mill is stung into steel signal by first-level machine L1 and switches to rolling force mode, specifically, being opened by signal " strip is cut in cropping "
Begin to carry out strip tracking, the strip position in then continuously being advanced using main transmission speed tracing, when strip reaches F1, strip
Tracking is synchronized using rolling force signal.
It is found in production, when switching to production electrical sheet by other steel grades, mm finishing mill unit roll change rolling often open rolling easily occurs
Several leading piece of (especially first piece) steel head drawing down.From two level machine L2 model angle analysis, since first piece of steel model of open rolling is each short
Phase coefficient is 0, and model accuracy is very poor at this time, need to be wait rolling first block of steel and after Model Self-Learning, each short-term coefficient of model
Just there are learning value, model accuracy to be likely to improve.Because each rack roll gap zero compensation gapZero values are all clear after roll change open rolling
Zero, former pieces of second flow precision of such open rolling are poor, and second flow mismatch, which is easily led to, between rack draws steel or piling of steel, when drawing steel serious
Cause strip steel head narrow rule.
For this purpose, an initial value is arranged to gapZero in present embodiment, advised by the self study of gapZero after tracking open rolling
Rule, a large amount of statistical data analysis have obtained the first Value Data (see the table below) of typical case of one group of gapZero, and have been applied to roll gap
In model, tracking first piece of each kink of steel of open rolling plays set situation, finds to draw steel, piling of steel phenomenon to significantly reduce between rack, to press down
Strip steel head drawing down is made.
GapZero initial values are applied in roll gap model by present embodiment, and tracking first piece of each kink of steel of open rolling plays set feelings
Condition finds to draw steel, piling of steel phenomenon to significantly reduce between rack, to inhibit strip steel head drawing down.
Present embodiment is 1000~1030 DEG C from stability contorting finish rolling start rolling temperature and starts with, and optimizes slab heating temperature control
System, suitable control slab are come out of the stove at 1140~1190 DEG C；Heating process in curing oven, it is ensured that board briquette between different heating heat
Unanimously.Meanwhile the present invention cures de-scaling system and threading speed, appropriate tension setting value between reducing finishing stand, to improve L2
Two level machine model specification precision slows down the trend that steel is drawn on head.Also, speed regulation function is utilized, to obviously drawing the rack of steel
Carry out velocity compensation.
The strip steel specification of head narrow rule is analyzed to identify in production, if it find that there is microcephaly, the short row of time update
Journey coefficient prevents follow-up finishing rolling step head narrow rule.
To be undergone phase transition between finishing stand when solving non-orientation silicon steel hot rolling, the difficulty for causing the threading operation of rolling unstable
Topic, both at home and abroad the technical solution adopted is that being used as compensation factor to participate in calculating control mill stiffness and strip plastic coefficient,
But self study calculates and control, meeting more aggravate AGC roll gap compensation rates it was verified that silicon steel plastic coefficient compensation factor is added
Influence, to substantially influence of rolled stability.Present embodiment is adopted alternatively, that is, is not counted in silicon steel plastic coefficient benefit
The factor is repaid, but spread factor is added in AGC compensation, influences of the current AGC to rolling stability can be mitigated in this way, finish rolling is steady
Qualitative enhancing, strip width drawing down are greatly decreased.
Under the conditions of industrialized production, above-mentioned technological measure is applied using 50W800 as the non-orientation silicon steel of representative heat
In roll process, the wide quality improvement significant effect of plate, (abscissa is strip length side as shown in Figures 2 and 3 for quality in kind comparison
To).By Fig. 2 and Fig. 3 it is found that before improving, strip steel head region drawing down is apparent；After improvement, strip steel head region drawing down phenomenon
It disappears, and overall width is strict controlled in the margin of tolerance.
It is not difficult to find that finishing mill is stung steel signal by the present invention switches to rolling force mode, realize to strip steel head accurately with
Track shortens feedback time, while reducing tension setting value raising L2 model specification precision between finishing stand, slows down head and draws steel
Trend.
Claims (5)
1. it is a kind of improve non-orientation silicon steel lumber recovery production method, which is characterized in that intermediate base head shear after, into except
Squama case, calculate F1 finishing stands bites time and belt steel temperature, and finishing mill, which is stung steel signal, by first-level machine L1 switches to rolling
Force mode.
2. the production method according to claim 1 for improving non-orientation silicon steel lumber recovery, which is characterized in that by mm finishing mill unit
Each rack roll gap zero compensation gapZero values set one group of initial value and applied in roll gap model after roll change open rolling.
3. the production method according to claim 1 for improving non-orientation silicon steel lumber recovery, which is characterized in that finish rolling open rolling temperature
At 1000~1030 DEG C, control slab is come out of the stove at 1140~1190 DEG C for degree control.
4. the production method according to claim 1 for improving non-orientation silicon steel lumber recovery, which is characterized in that add in curing oven
Thermal process, de-scaling system and threading speed reduce tension setting value between finishing stand, to improve two level machine L2 model specification essences
Degree；And speed regulation function is utilized, to obviously drawing the rack of steel to carry out velocity compensation.
5. the production method according to claim 1 for improving non-orientation silicon steel lumber recovery, which is characterized in that mm finishing mill unit is rolled
When processed, spread factor is added as compensation factor in AGC compensation models and participates in calculating control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810289219.6A CN108637019A (en) | 2018-04-03 | 2018-04-03 | A kind of production method improving non-orientation silicon steel lumber recovery |
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| CN201810289219.6A CN108637019A (en) | 2018-04-03 | 2018-04-03 | A kind of production method improving non-orientation silicon steel lumber recovery |
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Cited By (4)
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| CN110899338A (en) * | 2019-11-29 | 2020-03-24 | 张家港宏昌钢板有限公司 | Preparation method of hot-rolled strip steel |
| CN114682630A (en) * | 2022-04-06 | 2022-07-01 | 安阳钢铁股份有限公司 | Hot rolling process of non-oriented silicon steel |
| CN115055918A (en) * | 2022-06-17 | 2022-09-16 | 首钢智新迁安电磁材料有限公司 | Continuous rolling method of non-oriented silicon steel |
| CN115446113A (en) * | 2022-09-28 | 2022-12-09 | 湖南宏旺新材料科技有限公司 | Cold rolling process for improving oil burning defect of surface of silicon steel plate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110899338A (en) * | 2019-11-29 | 2020-03-24 | 张家港宏昌钢板有限公司 | Preparation method of hot-rolled strip steel |
| CN114682630A (en) * | 2022-04-06 | 2022-07-01 | 安阳钢铁股份有限公司 | Hot rolling process of non-oriented silicon steel |
| CN114682630B (en) * | 2022-04-06 | 2023-12-05 | 安阳钢铁股份有限公司 | Hot rolling process of non-oriented silicon steel |
| CN115055918A (en) * | 2022-06-17 | 2022-09-16 | 首钢智新迁安电磁材料有限公司 | Continuous rolling method of non-oriented silicon steel |
| CN115055918B (en) * | 2022-06-17 | 2023-09-19 | 首钢智新迁安电磁材料有限公司 | Continuous rolling method of non-oriented silicon steel |
| CN115446113A (en) * | 2022-09-28 | 2022-12-09 | 湖南宏旺新材料科技有限公司 | Cold rolling process for improving oil burning defect of surface of silicon steel plate |
| CN115446113B (en) * | 2022-09-28 | 2024-04-26 | 湖南宏旺新材料科技有限公司 | Cold rolling process for improving oil burning defect of silicon steel plate surface |
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Application publication date: 20181012 |