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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- 238000005096 rolling process Methods 0.000 title claims abstract description 81
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 239000000498 cooling water Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000005097 cold rolling Methods 0.000 claims description 10
- 238000009749 continuous casting Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000005098 hot rolling Methods 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 12
- 239000010959 steel Substances 0.000 abstract description 12
- 238000012797 qualification Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000007704 transition Effects 0.000 description 16
- 239000000463 material Substances 0.000 description 13
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003908 quality control method 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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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
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- 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
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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Abstract
The invention relates to a hot continuous rolling production method of non-oriented silicon steel, which comprises the following chemical components in percentage by mass: c is less than or equal to 0.0040 percent; si: 1.4% -1.6%; mn: 0.25 to 0.4 percent; p: 0.04 to 0.07 percent; s is less than or equal to 0.005 percent; al: 0.2% -0.3%; n is less than or equal to 0.003 percent; v is less than or equal to 0.005 percent; nb is less than or equal to 0.005 percent; u is less than or equal to 0.015 percent; ni is less than or equal to 0.1 percent; cr is less than or equal to 0.025 percent; ti is less than or equal to 0.005 percent; mo is less than or equal to 0.01 percent; the balance of Fe and inevitable impurities. The advantages are that: the non-oriented silicon steel hot-rolled steel coil produced by the process has qualified quality and can be used as an excellent cold-rolled silicon steel raw material, the plate shape index convexity C40 is less than or equal to 35 mu m, the wedge C40 is less than or equal to 20 mu m, and the hot-rolled plate shape qualification rate is more than or equal to 95.7 percent.
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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