CN109082607A - Non-oriented silicon steel and hot continuous rolling production method thereof - Google Patents
Non-oriented silicon steel and hot continuous rolling production method thereof Download PDFInfo
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Abstract
本发明涉及一种无取向硅钢热连轧生产方法，所述无取向硅钢的化学成分按质量百分比为：C≤0.0040％；Si：1.4％～1.6％；Mn：0.25％～0.4％；P：0.04％～0.07％；S≤0.005％；Al：0.2％～0.3％；N≤0.003％；V≤0.005％；Nb≤0.005％；U≤0.015％；Ni≤0.1％；Cr≤0.025％；Ti≤0.005％；Mo≤0.01％；其余为Fe和不可避免的杂质。优点是：使用上述工艺生产的无取向硅钢热轧钢卷质量合格，可作为优良的冷轧硅钢原料，板形指标凸度C40≤35μm，楔形C40≤20μm，热轧板形合格率≥95.7％。
The invention relates to a production method of hot continuous rolling of non-oriented silicon steel. The chemical composition of the non-oriented silicon steel is: C≤0.0040%; Si: 1.4%-1.6%; Mn: 0.25%-0.4%; P: 0.04%～0.07%; S≤0.005%; Al: 0.2%～0.3%; N≤0.003%; V≤0.005%; Nb≤0.005%; U≤0.015%; Ni≤0.1%; Cr≤0.025%; Ti ≤0.005%; Mo≤0.01%; the rest is Fe and unavoidable impurities. The advantages are: the non-oriented silicon steel hot-rolled steel coil produced by the above-mentioned process is of qualified quality and can be used as an excellent raw material for cold-rolled silicon steel. .
Description
Technical field
The invention belongs to hot continuous rolling production field more particularly to a kind of non-orientation silicon steels and its hot continuous rolling process.
Background technique
Silicon steel refers to that silicon content is 0.5% to 4.5% extremely low carbon duriron alloy, is divided because of structure and purposes difference
For non-orientation silicon steel and orientation silicon steel.Silicon steel is mainly used as the iron core of various motors, generator, compressor, motor and transformer,
It is the indispensable raw material product of the industries such as electric power, household electrical appliances.Because manufacturing technology is stringenter than general steel products, production technology it is complicated and
Content is higher, and silicon steel is once called " craftwork in steel products ", is the mark of a national steel industry development level.
Silicon steel sheet is divided to two kinds of hot rolling, cold rolling, and most commonly used currently on the market is cold-reduced silicon sheet.Cold rolled silicon steel is with heat
Roll strip raw material carry out cold rolling production, due to cold rolled silicon steel strip shape quality by hot rolling raw material hereditation larger, silicon steel
Cold rolling process is higher and higher to the quality requirement of hot rolling raw material, wherein hot-strip convexity C40≤35 μm are required, wedge-shaped C40≤
It is 20 μm, very narrow to the quality control interval requirement of hot-strip, once hot-rolled production process control is improper, it will result in quality
Unqualified, the silicon steel after influencing cold rolling is off quality.
Summary of the invention
In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a kind of non-orientation silicon steels and its heat for cold rolling
Continuous rolling process keeps non-orientation silicon steel primary quality measure qualified, and hot-rolled coil reaches plate shape index convexity C40≤35 μm,
Wedge-shaped C40≤20 μm, strip shape quality qualification rate >=95%, edge breach ratio of defects≤1.5%.
To achieve the above object, the invention is realized by the following technical scheme:
A kind of non-orientation silicon steel, the chemical component of the non-orientation silicon steel is by mass percentage are as follows: C≤0.0040%；Si:
1.4%~1.6%；Mn:0.25%~0.4%；P:0.04%~0.07%；S≤0.005%；Al:0.2%~0.3%；N≤
0.003%；V≤0.005%；Nb≤0.005%；Cu≤0.015%；Ni≤0.1%；Cr≤0.025%；Ti≤0.005%；
Mo≤0.01%；Remaining is Fe and inevitable impurity.
A kind of non-orientation silicon steel hot continuous rolling process, including smelting, heating, hot rolling, pickling, cold rolling and annealing:
1) continuous casting billet produces, and molten iron is skimmed through deep desulfurization process, desulfurized molten iron S≤0.0020%；Metal in Tundish mistake
Temperature is controlled at 25 DEG C or less；
2) 170~210min of time inside furnace is controlled；Control the control of the heating furnace soaking zone upper and lower surface furnace temperature temperature difference 30~
50℃；Tapping temperature is controlled at 1140 ± 20 DEG C；
3) roughing technology controlling and process
De-scaling after furnace, the first passage de-scaling of roughing R1, R2, remaining passage not de-scaling, the control of rough rolling working roll cooling pressure
0.8~0.95MPa of range, roughing 950~980 DEG C of control range of rolling temperature of extreme trace time, controls roughing R1, R2 or more roller speed
Balance is 1% or less；
4) finish-rolling process controls
Finish rolling slab de-scaling, interstand cooling water and gap cooling water are not put into, and cooling water pressure control range 0.75~
0.85MPa, finish rolling finishing temperature control 840~870 DEG C of target zone；Finish rolling threading 10.8~11.5m/s of speed control range,
Maximum mill speed 14.5m/s；
5) coiling technique controls
Section cooling uses rear cold mode, and section cooling final cooling temperature is controlled at 700 ± 20 DEG C；Batch the control of guide ruler pressure
4.8~6.4MPa.
Compared with prior art, the beneficial effects of the present invention are:
The non-orientation silicon steel coils of hot-rolled steel produced using above-mentioned technique is up-to-standard, and it is former to can be used as excellent cold rolled silicon steel
Material, wherein plate shape index convexity C40≤35 μm, wedge-shaped C40≤20 μm, hot rolled plate shape qualification rate >=95.7%, edge breach lack
The rate of falling into controllable≤1.2%.
Detailed description of the invention
Fig. 1 is the silicon steel organization chart of embodiment 1.
Fig. 2 is the silicon steel organization chart of embodiment 2.
Fig. 3 is the silicon steel organization chart of embodiment 3.
Specific embodiment
The present invention is described in detail below, it should be noted that implementation of the invention embodiment party not limited to the following
Formula.
Non-orientation silicon steel hot continuous rolling process, the chemical component of non-orientation silicon steel is by mass percentage are as follows: and C≤
0.0040%；Si:1.4%~1.6%；Mn:0.25%~0.4%；P:0.04%~0.07%；S≤0.005%；Al:
0.2%~0.3%；N≤0.003%；V≤0.005%；Nb≤0.005%；U≤0.015%；Ni≤0.1%；Cr≤
0.025%；Ti≤0.005%；Mo≤0.01%；Remaining is Fe and inevitable impurity.
Non-orientation silicon steel hot continuous rolling process, comprising the following steps:
1) continuous casting billet produces, and molten iron is skimmed through deep desulfurization process, desulfurized molten iron S≤0.0020%；Metal in Tundish mistake
Temperature is controlled at 25 DEG C or less；
2) the rolling front and back period does not produce steel grade of the heating temperature at 1230 DEG C or more；It is produced before from open rolling to rolling silicon steel
18 pieces or more mild steel transition materials, transition material rolling specs: for thickness from 4.0mm → 2.3mm gradually transition, width is silicon steel rolling
Finished width+30mm or more；Transition material steel slab below 2.75mm thickness specification, and SP constant width machine is not put into；
3) 170~210min of time inside furnace is controlled；Control the control of the heating furnace soaking zone upper and lower surface furnace temperature temperature difference 30~
50℃；Tapping temperature is controlled at 1140 ± 20 DEG C；
4) roughing technology controlling and process
De-scaling after furnace, the first passage de-scaling of roughing R1, R2, remaining passage not de-scaling, the control of rough rolling working roll cooling pressure
0.8~0.95MPa of range, roughing 950~980 DEG C of control range of rolling temperature of extreme trace time, controls roughing R1, R2 or more roller speed
Balance is 1% or less；
5) finish-rolling process controls
Finish rolling slab de-scaling, interstand cooling water and gap cooling water are not put into, the control of precision rolling working roll cooling water pressure
0.75~0.85MPa of range, finish rolling finishing temperature control 840~870 DEG C of target zone；Finish rolling threading speed control range 10.8
~11.5m/s, maximum mill speed 14.5m/s；
The independent adapted working roll of finish rolling F1, F2, the sinusoidal roll shape of roll shape use -50；Finish rolling F2, F3 frame side guide and guard installation is led
Wheel；
6) coiling technique controls
Section cooling uses rear cold mode, and section cooling final cooling temperature is controlled at 700 ± 20 DEG C；Batch the control of guide ruler pressure
4.8~6.4MPa.
Embodiment 1
The non-orientation silicon steel hot rolled strip that a kind of thickness 2.3mm, width 1060mm are produced in the present embodiment, by following step
Suddenly it is produced:
1) silicon steel slab ingredient: C:0.0029%；Si:1.6%；Mn:0.31%；P:0.059%；S:0.0049%；Al:
0.26%；N:0.0016%；V:0.003%；Nb:0.0014%；Cu:0.0097%；Ni:0.0061%；Cr:0.0111%；
Ti:0.00111%；Mo:0.0025%；23 DEG C of molten steel overheat, using continuous casting machine casting at width 1100mm, thickness 200mm, length
Spend the continuous casting billet of 11500mm；
2) from the open rolling of silicon steel rolling cycle to the rolling silicon steel 18 pieces of mild steel SPHC in front row as transition material, the rolling of transition material
With a thickness of 4.0mm → 2.3mm, gradually transition is thinned, and transition material rolling width is that 1250mm → 1100mm is gradually reduced；
3) silicon steel strip finished product rolling specs: thickness 2.3mm, width 1060mm；
4) heating process: 190~200min of time inside furnace controls the practical furnace temperature temperature difference 35 of heating furnace soaking zone upper and lower surface
~45 DEG C, control 1125~1145 DEG C of tapping temperature；
5) the double investment of De-scaling box after furnace, cleared scale on surface；Roughing R1, R2 rack roll 3 passages, roughing respectively
The first passage de-scaling of R1, R2, remaining passage not de-scaling, rough rolling working roll cooling pressure 0.8~0.95MPa of control range, roughing
Extreme trace time rolling temperature controls 955~977 DEG C of target zone, and control roughing R1, R2 up-down rollers velocity balance is 1% or less；Control
38~40mm of silicon steel workpiece thickness that roughing processed rolls；
6) the cleared intermediate base scale on surface of dephosphorization case, finish rolling operation of rolling interstand cooling water and roller are utilized before finish rolling
It stitches cooling water to close, precision rolling working roll cooling water pressure is controlled in 0.75~0.85MPa；Finish rolling finishing temperature control 840~860
℃；Finish rolling threading speed 10.8m/s, maximum mill speed 14.5m/s；
7) the independent adapted working roll of finish rolling F1, F2, the sinusoidal roll shape of roll shape use -50；The control of F1, F2 mill guide wheel opening degree
In 1080~1090mm；
8) section cooling uses rear cold mode, and section cooling final cooling temperature is controlled at 690~715 DEG C, batches guide ruler pressure
Control 4.8~6.4MPa；
9) using non-orientation silicon steel hot rolled strip convexity C40:22~33 μm of this technique production, the μ of wedge-shaped C40:-15~13
M, hot-rolling edge cracking ratio of defects 0.86%, plate shape qualification rate 98.7%, hot-strip tissue is as shown in Figure 1, tissue is tied again to be coarse
Crystalline substance tissue, strip surface quality and plate shape well meet cold rolled silicon steel production needs, the magnetic property after pickling and cold-rolling annealing production
Reach: 3.74~3.95W/kg of iron loss P15/50 range；1.665~1.679T of magnetic strength B5000/50 range.
Embodiment 2
The non-orientation silicon steel hot rolled strip that a kind of thickness 2.3mm, width 1125mm are produced in the present embodiment, by following step
Suddenly it is produced:
1) silicon steel slab ingredient: C:0.0027%；Si:1.57%；Mn:0.35%；P:0.052%；S:0.0049%；
Al:0.28%；N:0.0012%；V:0.002%；Nb:0.0011%；Cu:0.0085%；Ni:0.0063%；Cr:
0.0175%；Ti:0.00133%；Mo:0.0011%；24 DEG C of molten steel overheat, using continuous casting machine casting at width 1165mm, thickness
Spend the continuous casting billet of 200mm, length 11500mm；
2) from the open rolling of silicon steel rolling cycle to the rolling silicon steel 18 pieces of mild steel SPHC in front row as transition material, the rolling of transition material
With a thickness of 4.0mm → 2.3mm, gradually transition is thinned, and transition material rolling width is that 1250mm → 1150mm is gradually reduced；
3) silicon steel strip finished product rolling specs: thickness 2.3mm, width 1165mm；
4) heating process: 187~202min of time inside furnace controls the practical furnace temperature temperature difference 38 of heating furnace soaking zone upper and lower surface
~49 DEG C, control 1122~1144 DEG C of tapping temperature；
5) the double investment of De-scaling box after furnace, cleared scale on surface；Roughing R1, R2 rack roll 3 passages, roughing respectively
The first passage de-scaling of R1, R2, remaining passage not de-scaling, rough rolling working roll cooling pressure 0.8~0.92MPa of control range, roughing
Extreme trace time rolling temperature controls 950~975 DEG C of target zone, and control roughing R1, R2 up-down rollers velocity balance is 1% or less；Control
38~40mm of silicon steel workpiece thickness that roughing processed rolls；
6) the cleared intermediate base scale on surface of dephosphorization case, finish rolling operation of rolling interstand cooling water and roller are utilized before finish rolling
It stitches cooling water to close, precision rolling working roll cooling water pressure is controlled in 0.75~0.85MPa；Finish rolling finishing temperature control 840~860
℃；Finish rolling threading speed 10.8m/s, maximum mill speed 14.1m/s；
7) the independent adapted working roll of finish rolling F1, F2, the sinusoidal roll shape of roll shape use -50；The control of F1, F2 mill guide wheel opening degree
In 1185~1196mm；
8) section cooling uses rear cold mode, and section cooling final cooling temperature is controlled at 687~712 DEG C, batches guide ruler pressure
Control 4.8~6.4MPa；
9) using non-orientation silicon steel hot rolled strip convexity C40:18~34 μm of this technique production, the μ of wedge-shaped C40:-16~11
M, hot-rolling edge cracking ratio of defects 0.89%, plate shape qualification rate 98.5%, hot-strip tissue is as shown in Fig. 2, tissue is tied again to be coarse
Crystalline substance tissue, surface quality and plate shape well meet cold rolled silicon steel production needs, and magnetic property reaches after pickling and cold-rolling annealing production:
3.69~3.85W/kg of iron loss P15/50 range；1.663~1.676T of magnetic strength B5000/50 range.
Embodiment 3
The non-orientation silicon steel hot rolled strip that a kind of thickness 2.3mm, width 1185mm are produced in the present embodiment, by following step
Suddenly it is produced:
1) silicon steel slab ingredient: C:0.0029%；Si:1.57%；Mn:0.36%；P:0.051%；S:0.0042%；
Al:0.29%；N:0.0009%；V:0.001%；Nb:0.0012%；Cu:0.0087%；Ni:0.0039%；Cr:
0.0105%；Ti:0.00102%；Mo:0.0010%；25 DEG C of molten steel overheat, using continuous casting machine casting at width 1225mm, thickness
Spend the continuous casting billet of 200mm, length 11500mm；
2) from the open rolling of silicon steel rolling cycle to the rolling silicon steel 18 pieces of mild steel SPHC in front row as transition material, the rolling of transition material
With a thickness of 4.0mm → 2.3mm, gradually transition is thinned, and transition material rolling width is that 1280mm → 1205mm is gradually reduced；
3) silicon steel strip finished product rolling specs: thickness 2.3mm, width 1185mm；
4) heating process: 175~201min of time inside furnace controls the practical furnace temperature temperature difference 40 of heating furnace soaking zone upper and lower surface
~49 DEG C, control 1120~1140 DEG C of tapping temperature；
5) the double investment of De-scaling box after furnace, cleared scale on surface；Roughing R1, R2 rack roll 3 passages, roughing respectively
The first passage de-scaling of R1, R2, remaining passage not de-scaling, rough rolling working roll cooling pressure 0.80~0.89MPa of control range, roughing
Extreme trace time rolling temperature controls 952~974 DEG C of target zone, and control roughing R1, R2 up-down rollers velocity balance is 1% or less；Control
38~40mm of silicon steel workpiece thickness that roughing processed rolls；
7) the cleared intermediate base scale on surface of dephosphorization case, finish rolling operation of rolling interstand cooling water and roller are utilized before finish rolling
It stitches cooling water to close, precision rolling working roll cooling water pressure is controlled in 0.78~0.85MPa；Finish rolling finishing temperature control 841~860
℃；Finish rolling threading speed 10.8m/s, maximum mill speed 14.4m/s；
8) the independent adapted working roll of finish rolling F1, F2, the sinusoidal roll shape of roll shape use -50；The control of F1, F2 mill guide wheel opening degree
In 1205~1220mm；
9) section cooling uses rear cold mode, and section cooling final cooling temperature is controlled at 692~715 DEG C, batches guide ruler pressure
Control 4.8~6.4MPa；
10) using non-orientation silicon steel hot rolled strip convexity C40:20~32 μm of this technique production, wedge-shaped C40:-11~13
μm, hot-rolling edge cracking ratio of defects 0.91%, plate shape qualification rate 98.9%, hot-strip tissue is as shown in figure 3, tissue is tied again to be coarse
Crystalline substance tissue, surface quality and plate shape well meet cold rolled silicon steel production needs, and magnetic property reaches after pickling and cold-rolling annealing production:
Iron loss P15/50:3.72~3.89W/kg；Magnetic strength B5000/50:1.667~1.681T.
Claims (2)
1. a kind of non-orientation silicon steel, which is characterized in that the chemical component of the non-orientation silicon steel is by mass percentage are as follows: C≤
0.0040%；Si:1.4%~1.6%；Mn:0.25%~0.4%；P:0.04%~0.07%；S≤0.005%；Al:
0.2%~0.3%；N≤0.003%；V≤0.005%；Nb≤0.005%；Cu≤0.015%；Ni≤0.1%；Cr≤
0.025%；Ti≤0.005%；Mo≤0.01%；Remaining is Fe and inevitable impurity.
2. a kind of non-orientation silicon steel hot continuous rolling process according to claim 1, including smelting, heating, hot rolling, acid
It washes, cold rolling and annealing, it is characterised in that:
1) continuous casting billet produces, and molten iron is skimmed through deep desulfurization process, desulfurized molten iron S≤0.0020%；The Metal in Tundish degree of superheat
Control is at 25 DEG C or less；
2) 170~210min of time inside furnace is controlled；The control of the heating furnace soaking zone upper and lower surface furnace temperature temperature difference is controlled at 30~50 DEG C；
Tapping temperature is controlled at 1140 ± 20 DEG C；
3) roughing technology controlling and process
De-scaling after furnace, the first passage de-scaling of roughing R1, R2, remaining passage not de-scaling, rough rolling working roll cooling pressure control range
0.8~0.95MPa, roughing 950~980 DEG C of control range of rolling temperature of extreme trace time, controls roughing R1, R2 up-down rollers velocity balance
It is 1% or less；
4) finish-rolling process controls
Finish rolling slab de-scaling, interstand cooling water and gap cooling water are not put into, and cooling water pressure control range 0.75~
0.85MPa, finish rolling finishing temperature control 840~870 DEG C of target zone；Finish rolling threading 10.8~11.5m/s of speed control range,
Maximum mill speed 14.5m/s；
5) coiling technique controls
Section cooling uses rear cold mode, and section cooling final cooling temperature is controlled at 700 ± 20 DEG C；Batch guide ruler pressure control 4.8
~6.4MPa.
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| CN110586657A (en) * | 2019-09-04 | 2019-12-20 | 鞍钢股份有限公司 | Production method for reducing crack defects of hot-rolled edge of non-oriented silicon steel |
| CN110976513A (en) * | 2019-10-30 | 2020-04-10 | 张家港宏昌钢板有限公司 | Hot rolling production method for improving hot rolling temperature hit rate of silicon steel |
| CN112342465A (en) * | 2020-10-20 | 2021-02-09 | 张家港宏昌钢板有限公司 | Hot-rolled low-cost non-oriented silicon steel W600 and manufacturing method thereof |
| CN113083896A (en) * | 2021-02-20 | 2021-07-09 | 张家港宏昌钢板有限公司 | Process for controlling burr-like thickness fluctuation of silicon steel and silicon steel sheet product prepared by same |
| CN114472518A (en) * | 2021-12-24 | 2022-05-13 | 安阳钢铁股份有限公司 | Method for improving thickness precision of hot continuous rolling non-oriented silicon 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 |
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| CN110586657A (en) * | 2019-09-04 | 2019-12-20 | 鞍钢股份有限公司 | Production method for reducing crack defects of hot-rolled edge of non-oriented silicon steel |
| CN110976513A (en) * | 2019-10-30 | 2020-04-10 | 张家港宏昌钢板有限公司 | Hot rolling production method for improving hot rolling temperature hit rate of silicon steel |
| CN112342465A (en) * | 2020-10-20 | 2021-02-09 | 张家港宏昌钢板有限公司 | Hot-rolled low-cost non-oriented silicon steel W600 and manufacturing method thereof |
| CN113083896A (en) * | 2021-02-20 | 2021-07-09 | 张家港宏昌钢板有限公司 | Process for controlling burr-like thickness fluctuation of silicon steel and silicon steel sheet product prepared by same |
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| CN114472518A (en) * | 2021-12-24 | 2022-05-13 | 安阳钢铁股份有限公司 | Method for improving thickness precision of hot continuous rolling non-oriented silicon steel |
| CN114472518B (en) * | 2021-12-24 | 2023-12-29 | 安阳钢铁股份有限公司 | Method for improving thickness precision of hot continuous rolling non-oriented silicon 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 |
| WO2024022109A1 (en) * | 2022-07-29 | 2024-02-01 | 宝山钢铁股份有限公司 | Non-oriented electrical steel sheet having high magnetic flux density, and manufacturing method therefor |
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