CN107626745A - It is a kind of to be used to control the method that strip edge splits - Google Patents
It is a kind of to be used to control the method that strip edge splits Download PDFInfo
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- CN107626745A CN107626745A CN201610569343.9A CN201610569343A CN107626745A CN 107626745 A CN107626745 A CN 107626745A CN 201610569343 A CN201610569343 A CN 201610569343A CN 107626745 A CN107626745 A CN 107626745A
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Abstract
The present invention relates to a kind of method for controlling strip edge to split, suitable for the cold-rolled process after orientation silicon steel normalizing treatment；Including：1) before cold rolling in cutting operation, steel edge portion is heated, and adjusts disc shear blade thereby side clearance and amount of lap；2) before cold rolling strip temperature control more than 60 DEG C；3) in cold rolling process, the 1st percentage pass reduction of control, rolling temperature, deformation velocity, tension force and working roll roughness.By taking above measure, the present invention can effectively reduce belt phenomenon caused by side is split, and then improve milling train production capacity, and reduction rolls useless amount and subtracts side amount, improves orientation silicon steel strip quality of edges and product lumber recovery.
Description
Technical field
The present invention relates to cold-strip steel technical field, more particularly to a kind of it is used to control the method that strip edge splits.
Background technology
Orientation silicon steel is due to silicone content height in raw material, coarse grains, and regular practice is handled before rolling, makes its fragility, hardness
Significantly rise, the increase of raw edges sensitiveness.Strip edge in normalizing unit circle shear cutting edge can produce micro-crack, in the operation of rolling
In bear large plastometric set and stretching, bending combined stress effect produce side split and extend, serious strip edge, which splits, to be often resulted in
Rolling broken belt, roll banding, cut the production accidents such as roller.In addition, it is to prevent strip edge splits from triggering broken belt in rear portion continuous annealing unit in production
Accident, cutting edge processing need to be carried out to strip by welding unit, therefore strip edge splits the raising that not only limit product lumber recovery,
And labor intensity and production cost are increased, cause no small economic loss to enterprise.
The content of the invention
The invention provides a kind of method for controlling strip edge to split, belt phenomenon caused by side is split can be effectively reduced,
And then milling train production capacity is improved, reduction rolls useless amount and subtracts side amount, improves orientation silicon steel strip quality of edges and product lumber recovery.
In order to achieve the above object, the present invention is realized using following technical scheme：
It is a kind of to be used to control the method that strip edge splits, suitable for the cold-rolled process after orientation silicon steel normalizing treatment；Including：
1) cutting operation before cold rolling；
Steel edge portion heater is set in normalizing unit circle shear porch, steel edge portion is heated to more than 50 DEG C, to carry
High steel edge portion plasticity and toughness, eliminate or reduce the generation of steel edge portion fragility micro-crack in shear history；
Disc shear blade thereby side clearance is adjusted to 280~290 μm, amount of lap is adjusted to -380~-390 μm, eliminates or subtracts
The generation and extension of steel edge portion micro-crack in few shear history；
2) strip temperature control before cold rolling；
Strip temperature control is more than 60 DEG C before cold rolling, and during less than this temperature, coil of strip is put into water bath heating device
Heated 10~50 minutes under fluidized state；
3) cold rolling process；
Control the 1st percentage pass reduction：The passage of cold rolling the 1st uses big percentage pass reduction and micro- webbing plate form control, first
Secondary reduction ratio 35~36%, template instrument edge thickness control is in 20~50I；Prevent fine fisssure in supplied materials edge hardened layer and hardened layer
Line extends in deformation process to be formed side and splits；
Rolling temperature control：After 1st passes, because strip processing hardening increases brittle property, cause strip crisp-tough
Sex reversal zero point raises, and rolls inside rear strip still coarse grains, and poor toughness, counter-bending power is low, inlet of rolling mill breast
Change flow quantity and use the low discharge for being less than 1500L/min, milling train port closing emulsion, controlled rolling band steel plate temperature is at 130 DEG C
More than；
Control deformation velocity：1st passes back plate temperature rise, controlled rolling speed are 90~110m/min, prevent by
The increase of strip yield strength, toughness reduction, fragility increase are caused in speed increase；
Control tension force：1st passes backward pull is down to less than 2 tons, and forward pull is controlled below 20 tons；
Control working roll roughness：Working roll roughness is controlled at 2.0~2.2 μm, further improves roll and strip edge
The coefficient of friction in portion, the resistance increase for making steel edge portion outwards flow, lateral displacement amount reduces, so that steel edge portion is laterally drawn
Stress reduces.
Compared with prior art, the beneficial effects of the invention are as follows：
1) effectively depth is split on lifting strip quality of edges, control side, reduces belt phenomenon caused by side is split；
2) milling train rolls useless amount and reduced, and milling train lumber recovery improves；
3) ensure strip production each operation be normally carried out, milling train production capacity improve, cutting edge amount reduce, improve enterprise productivity and
Economic benefit.
Embodiment
It is of the present invention a kind of for controlling the method that strip edge splits, suitable for cold-rolled after orientation silicon steel normalizing treatment
Journey；Including：
1) cutting operation before cold rolling；
Steel edge portion heater is set in normalizing unit circle shear porch, steel edge portion is heated to more than 50 DEG C, to carry
High steel edge portion plasticity and toughness, eliminate or reduce the generation of steel edge portion fragility micro-crack in shear history；
Disc shear blade thereby side clearance is adjusted to 280~290 μm, amount of lap is adjusted to -380~-390 μm, eliminates or subtracts
The generation and extension of steel edge portion micro-crack in few shear history；
2) strip temperature control before cold rolling；
Strip temperature control is more than 60 DEG C before cold rolling, and during less than this temperature, coil of strip is put into water bath heating device
Heated 10~50 minutes under fluidized state；
3) cold rolling process；
Control the 1st percentage pass reduction：The passage of cold rolling the 1st uses big percentage pass reduction and micro- webbing plate form control, first
Secondary reduction ratio 35~36%, template instrument edge thickness control is in 20~50I；Prevent fine fisssure in supplied materials edge hardened layer and hardened layer
Line extends in deformation process to be formed side and splits；
Rolling temperature control：After 1st passes, because strip processing hardening increases brittle property, cause strip crisp-tough
Sex reversal zero point raises, and rolls inside rear strip still coarse grains, and poor toughness, counter-bending power is low, inlet of rolling mill breast
Change flow quantity and use the low discharge for being less than 1500L/min, milling train port closing emulsion, controlled rolling band steel plate temperature is at 130 DEG C
More than；
Control deformation velocity：1st passes back plate temperature rise, controlled rolling speed are 90~110m/min, prevent by
The increase of strip yield strength, toughness reduction, fragility increase are caused in speed increase；
Control tension force：1st passes backward pull is down to less than 2 tons, and forward pull is controlled below 20 tons；
Control working roll roughness：Working roll roughness is controlled at 2.0~2.2 μm, further improves roll and strip edge
The coefficient of friction in portion, the resistance increase for making steel edge portion outwards flow, lateral displacement amount reduces, so that steel edge portion is laterally drawn
Stress reduces.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment】
Cold rolling after orientation silicon steel normalizing treatment, following each operation take control measure respectively：
1) cutting operation before cold rolling；
Facts have proved the orientation silicon steel after normalizing treatment it is crisp-ductility transmition point temperature 50 DEG C of degree left and right, therefore in normalizing
Unit circle shear porch sets steel edge portion heater, and steel edge portion is heated into 80 DEG C；
The size of shearing side clearance and amount of lap directly influences the generation and extension of raw edges, therefore by disc shear blade thereby side
Gap is adjusted to 280 μm (being 410 μm during conventional production), and amount of lap is adjusted to -380 (being -450 μm during conventional production)；
2) strip temperature control before cold rolling；
Strip temperature control is more than 60 DEG C before cold rolling, and during less than this temperature, coil of strip is put into water bath heating device
Heated 10~50 minutes under fluidized state；Strip heating inequality or overlong time are prevented, causes surface scale serious.
3) cold rolling process；
Control the 1st percentage pass reduction：During conventional production, the passage of orientation silicon steel first uses big percentage pass reduction and meagre side
Plate form control, making in supplied materials edge hardened layer and hardened layer micro-crack, easily extension forms side and split in deformation process.This implementation
In example, the passage of cold rolling the 1st uses big percentage pass reduction and micro- webbing plate form control, (the conventional production of the first percentage pass reduction 36%
When be that 37%), template instrument edge thickness control is in 30I；Prevent that micro-crack was deforming in supplied materials edge hardened layer and hardened layer
Extension forms side and split in journey；Steel edge portion is adjusted to micro- webbing template by meagre side plate type, be advantageous to cut down the formation split of side with
Extension.
Rolling temperature control：After 1st passes, because strip processing hardening increases brittle property, cause strip crisp-tough
Sex reversal zero point raises, and rolls inside rear strip still coarse grains, and poor toughness, counter-bending power is low, inlet of rolling mill breast
Change the low discharge that flow quantity uses 1500L/min, milling train port closing emulsion, controlled rolling band steel plate temperature is more than 140 DEG C；
Control deformation velocity：1st passes back plate temperature rise, controlled rolling speed are 100m/min, are prevented due to speed
Degree increase causes the increase of strip yield strength, toughness reduction, fragility increase；
Control tension force：1st passes backward pull is down to 2 tons by 3 tons, and forward pull is controlled at 20 tons, and according to template, preceding
The sliding appropriate adjustment of value；
Control working roll roughness：Working roll roughness is controlled at 2.0~2.2 μm, further improves roll and strip edge
The coefficient of friction in portion, the resistance increase for making steel edge portion outwards flow, lateral displacement amount reduces, so that steel edge portion is laterally drawn
Stress reduces.
In the present embodiment, the side of orientation silicon steel strip finished product is split deep-controlled within 10mm, breaks caused by being split due to side
Band rate drops to 2.6% by 40%；Milling train lumber recovery brings up to 90% by 65%, and milling train overall output per manshift brings up to volume 8 by volume 5.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (1)
1. a kind of be used to control the method that strip edge splits, suitable for the cold-rolled process after orientation silicon steel normalizing treatment；Its feature exists
In, including：
1) cutting operation before cold rolling；
Steel edge portion heater is set in normalizing unit circle shear porch, steel edge portion is heated to more than 50 DEG C, to improve band
Steel edge plasticity and toughness, eliminate or reduce the generation of steel edge portion fragility micro-crack in shear history；
Disc shear blade thereby side clearance is adjusted to 280~290 μm, amount of lap is adjusted to -380~-390 μm, eliminates or reduces and cuts
The generation and extension of steel edge portion micro-crack during cutting；
2) strip temperature control before cold rolling；
Strip temperature control is more than 60 DEG C before cold rolling, during less than this temperature, coil of strip is put into water bath heating device and seethed with excitement
Heated 10~50 minutes under state；
3) cold rolling process；
Control the 1st percentage pass reduction：The passage of cold rolling the 1st uses big percentage pass reduction and micro- webbing plate form control, the first passage pressure
Lower rate 35~36%, template instrument edge thickness control is in 20~50I；Prevent that micro-crack exists in supplied materials edge hardened layer and hardened layer
Extension forms side and split in deformation process；
Rolling temperature control：After 1st passes, because strip processing hardening increases brittle property, cause strip it is crisp-toughness turns
Temperature critical point raises, and rolls inside rear strip still coarse grains, and poor toughness, counter-bending power is low, inlet of rolling mill emulsion
Flow uses the low discharge less than 1500L/min, and milling train port closing emulsion, controlled rolling band steel plate temperature is more than 130 DEG C；
Control deformation velocity：1st passes back plate temperature rise, controlled rolling speed are 90~110m/min, are prevented due to speed
Degree increase causes the increase of strip yield strength, toughness reduction, fragility increase；
Control tension force：1st passes backward pull is down to less than 2 tons, and forward pull is controlled below 20 tons；
Control working roll roughness：Working roll roughness is controlled at 2.0~2.2 μm, further raising roll and steel edge portion
Coefficient of friction, the resistance increase for making steel edge portion outwards flow, lateral displacement amount reduces, so that steel edge portion horizontal tensile stress
Reduce.
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| CN201610569343.9A CN107626745A (en) | 2016-07-18 | 2016-07-18 | It is a kind of to be used to control the method that strip edge splits |
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| CN201610569343.9A CN107626745A (en) | 2016-07-18 | 2016-07-18 | It is a kind of to be used to control the method that strip edge splits |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363878A (en) * | 2018-12-26 | 2020-07-03 | 山西建龙实业有限公司 | Production control method for edge crack defect of hot rolled steel strip |
| CN113000606A (en) * | 2021-02-23 | 2021-06-22 | 马鞍山钢铁股份有限公司 | Method for stably producing high-grade non-oriented electrical steel in batches |
| CN113020278A (en) * | 2021-03-05 | 2021-06-25 | 武汉钢铁有限公司 | Method for prejudging cold rolling brittle failure occurrence of oriented silicon steel |
| CN113042532A (en) * | 2021-03-12 | 2021-06-29 | 武汉钢铁有限公司 | Bi-containing high magnetic induction oriented silicon steel hot-rolled strip steel edge quality control method |
| CN113403463A (en) * | 2021-05-25 | 2021-09-17 | 鞍钢股份有限公司 | Production method for improving cold rolling processability of oriented silicon steel |
| CN113403455A (en) * | 2021-06-17 | 2021-09-17 | 张家港扬子江冷轧板有限公司 | Production method of non-oriented silicon steel |
| CN113458142A (en) * | 2021-07-05 | 2021-10-01 | 湖南华菱涟源钢铁有限公司 | Medium-temperature common oriented silicon steel and preparation method thereof |
| CN113621887A (en) * | 2021-07-23 | 2021-11-09 | 山东钢铁集团日照有限公司 | Production method of low-cost cold-rolled steel strip raw material for packing belt |
| CN113751517A (en) * | 2021-09-13 | 2021-12-07 | 鞍钢股份有限公司 | Control method for improving cold rolling strip breakage of high-grade non-oriented silicon steel |
| CN114045433A (en) * | 2021-11-10 | 2022-02-15 | 张家港扬子江冷轧板有限公司 | Ultra-low iron loss non-oriented silicon steel and production method thereof |
| CN114769336A (en) * | 2022-04-27 | 2022-07-22 | 鞍钢股份有限公司 | Rolling method for inhibiting cold rolling edge crack of oriented silicon steel |
| CN115433869A (en) * | 2022-09-23 | 2022-12-06 | 无锡普天铁心股份有限公司 | Method for improving wide-direction magnetic uniformity of low-temperature high-magnetic-induction oriented silicon steel plate |
| CN115569986A (en) * | 2022-09-26 | 2023-01-06 | 山东新美达科技材料有限公司 | Rolling method for rolling 0.115-750 mm narrow strip cold-rolled low-carbon steel coil by wide rolling mill |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363878A (en) * | 2018-12-26 | 2020-07-03 | 山西建龙实业有限公司 | Production control method for edge crack defect of hot rolled steel strip |
| CN113000606B (en) * | 2021-02-23 | 2022-05-24 | 马鞍山钢铁股份有限公司 | Method for stably producing high-grade non-oriented electrical steel in batches |
| CN113000606A (en) * | 2021-02-23 | 2021-06-22 | 马鞍山钢铁股份有限公司 | Method for stably producing high-grade non-oriented electrical steel in batches |
| CN113020278A (en) * | 2021-03-05 | 2021-06-25 | 武汉钢铁有限公司 | Method for prejudging cold rolling brittle failure occurrence of oriented silicon steel |
| CN113020278B (en) * | 2021-03-05 | 2022-07-22 | 武汉钢铁有限公司 | Method for prejudging cold rolling brittle failure occurrence of oriented silicon steel |
| CN113042532A (en) * | 2021-03-12 | 2021-06-29 | 武汉钢铁有限公司 | Bi-containing high magnetic induction oriented silicon steel hot-rolled strip steel edge quality control method |
| CN113403463A (en) * | 2021-05-25 | 2021-09-17 | 鞍钢股份有限公司 | Production method for improving cold rolling processability of oriented silicon steel |
| CN113403455A (en) * | 2021-06-17 | 2021-09-17 | 张家港扬子江冷轧板有限公司 | Production method of non-oriented silicon steel |
| CN113403455B (en) * | 2021-06-17 | 2024-03-19 | 张家港扬子江冷轧板有限公司 | Production method of unoriented silicon steel |
| CN113458142A (en) * | 2021-07-05 | 2021-10-01 | 湖南华菱涟源钢铁有限公司 | Medium-temperature common oriented silicon steel and preparation method thereof |
| CN113621887A (en) * | 2021-07-23 | 2021-11-09 | 山东钢铁集团日照有限公司 | Production method of low-cost cold-rolled steel strip raw material for packing belt |
| CN113621887B (en) * | 2021-07-23 | 2022-06-10 | 山东钢铁集团日照有限公司 | Production method of low-cost cold-rolled steel strip raw material for packing belt |
| CN113751517A (en) * | 2021-09-13 | 2021-12-07 | 鞍钢股份有限公司 | Control method for improving cold rolling strip breakage of high-grade non-oriented silicon steel |
| CN114045433A (en) * | 2021-11-10 | 2022-02-15 | 张家港扬子江冷轧板有限公司 | Ultra-low iron loss non-oriented silicon steel and production method thereof |
| CN114769336A (en) * | 2022-04-27 | 2022-07-22 | 鞍钢股份有限公司 | Rolling method for inhibiting cold rolling edge crack of oriented silicon steel |
| CN114769336B (en) * | 2022-04-27 | 2023-03-17 | 鞍钢股份有限公司 | Rolling method for inhibiting cold rolling edge crack of oriented silicon steel |
| CN115433869A (en) * | 2022-09-23 | 2022-12-06 | 无锡普天铁心股份有限公司 | Method for improving wide-direction magnetic uniformity of low-temperature high-magnetic-induction oriented silicon steel plate |
| CN115569986A (en) * | 2022-09-26 | 2023-01-06 | 山东新美达科技材料有限公司 | Rolling method for rolling 0.115-750 mm narrow strip cold-rolled low-carbon steel coil by wide rolling mill |
| CN115569986B (en) * | 2022-09-26 | 2023-05-05 | 山东新美达科技材料有限公司 | Rolling method for rolling 0.115 x 750mm narrow-band cold-rolled low-carbon steel coil by wide rolling mill |
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