CN104480386A - 0.2mm-thick non-oriented silicon steel for high-speed motor and production method of 0.2mm-thick non-oriented silicon steel - Google Patents
0.2mm-thick non-oriented silicon steel for high-speed motor and production method of 0.2mm-thick non-oriented silicon steel Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—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
- C21D8/1266—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 between cold rolling steps
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Abstract
The invention discloses 0.2mm-thick non-oriented silicon steel for a high-speed motor. The silicon steel comprises the following components in percentage by weight: 0.001-0.025 percent of C, 2.6-3.0 percent of Si, 0.25-0.55 percent of Al, 0.10-0.30 percent of Mn, less than or equal to 0.015 percent of P, 0.001-0.0025 percent of S and 0.001-0.0025 percent of N. The production method comprises the following steps: smelting by using a vacuum induction furnace, and casting steel ingots; cogging and heating; forging and heating; performing hot rolling; normalizing; pickling; performing primary cold rolling; performing intermediate annealing; performing secondary cold rolling; annealing the finished product; and performing conventional cooling, shearing, performing sample preparation, and measuring the magnetic and mechanical energy. The mechanical property yield ratio is more than or equal to 0.70 and less than or equal to 0.73 under the condition that the magnetic property P1.0/1k is less than or equal to 40w/kg and B5000 is more than or equal to 1.68T, and the service requirement of manufacturing an iron core of the high-speed motor is met.
Description
Technical field
The present invention relates to a kind of non orientating silicon steel and production method, belong to the thick non orientating silicon steel of a kind of used in high-speed motor 0.2mm and production method particularly.
Background technology
Along with the awakening of development of world economy and resource consumption, energy saving standard consciousness, require electromechanical equipment high efficiency and miniaturization.And the prerequisite realizing high efficiency is exactly to improve the speed of equipment operation, there is large development in the pot motor being thus greater than 10,000 r/min.Because the raising of frequency of utilization, proposes active demand to non orientating silicon steel: the electrical sheet making iron core is thin as much as possible, to obtain excellent electromagnetic performance, reduce inherent loss.But current process means, be difficult to obtain the product that magnetic meets the requirements in the process reducing thickness, main manifestations is exactly that manufacture difficulty is large, lumber recovery is low, magnetic difference.
High-speed electric expreess locomotive requires that non-oriented electrical steel has: 1, Thin Specs, to meet low-loss requirement; 2, low iron loss, during to ensure high speed rotating, temperature is no more than prescribed value; 3, high magnetic strength, to alleviate its weight and volume.4, mechanical property is moderate, the requirement that when intensity can not meet motor high speed rotating too high, again when should meet high speed punching, intensity can not be too low.
" manufacture method of non-oriented magnetic steel sheet strip " (JP1996060252), its chemical composition and wt% are: Si:0.5 ~ 4%, Al :≤1%, below Si+Al:4.5%, Mn:0.17 ~ 0.25%, C≤0.005%, N≤0.005%, all the other are Fe and remnants, obtain the non-oriented magnetic steel sheet strip of thickness of slab 0.1 ~ 0.25mm through common process.The sial element content range of this patent is larger, silicone content Si:>=3.3%, by regulating annealing temperature and atmosphere to obtain the good non-oriented magnetic steel sheet strip of frequency performance, mainly for be the adjustment of annealing atmosphere, but magnetic is not still very desirable, 2 ~ 3 examples in embodiment, are only had to meet P
1.0/400≤ 13w/kg, B
5000>=1.68T.Do not consider mechanical property.
" manufacture method of low iron loss non-oriented magnetic steel sheet strip " (JP1996060311), its chemical composition and wt% are: Si:1 ~ 4%, Al :≤0.004%, Mn:0.17 ~ 0.20%, C≤0.005%, N≤0.005%, all the other are Fe and remnants, obtain the non-oriented magnetic steel sheet strip of thickness of slab 0.1 ~ 0.25mm through common process.The silicon content scope of this patent is comparatively large, and annealing temperature is higher.Control magnetic property by controlling grain size, but iron loss only tests the loss under intermediate frequency 400Hz, its value is still higher, P in embodiment
1.0/400average is 12.38w/kg, and magnetic strength is not mentioned, magnetic property is difficult to the requirement meeting high-speed electric expreess locomotive.Do not relate to mechanical property.
" the high frequency non-oriented magnetic steel sheet that the little surface of anisotropy is excellent and manufacture method thereof " (JP2001295003), its chemical composition and wt% are: C≤0.010%, Mn≤1.5%, Si≤4.0%, Al≤3.0%, and satisfy condition 3.0%≤Si+Mn+Al≤6.0% and condition 2.0%≤Si-Mn+2Al, be rolled into the band steel of about 0.10 ~ 0.25mm.This patent composition scope is comparatively wide in range, grain size and magnetic property is controlled by controlling secondary cold-rolling middle draft, finished surface roughness and annealing temperature, wherein, secondary cold-rolling interior thickness is not from 0.95 ~ 1.8mm etc., intermediate anneal temperature is more than 1000 DEG C, obtain good intermediate frequency iron loss and anisotropy, but magnetic strength is still lower, B
5000maximum value is only 1.62T.Also mechanical property is not considered.
" a kind of manufacture method of cold rolling non-orientation silicon steel thin belt " (CN101269384); its chemical composition and wt% are: C:0.001 ~ 0.005%; Si:2.4 ~ 3.5%, Mn:0.4 ~ 0.6%, Sn:0.07 ~ 0.2%; S:0.001 ~ 0.005%; P:0.001 ~ 0.005%, Al:0.4 ~ 1.0%, all the other are Fe and inevitable impurity; through overpickling, normalizing and twice cold rolling after annealing process, obtain the steel plate of 2.0 ~ 3.0mm.This patent adds alloying element Sn, and utilize the Grain Boundary Segregation of Sn to improve the final annealing texture of steel, add production cost and production difficulty, the magnetic strength obtained is also lower, and composition range also needs further optimization.Interior thickness and annealing process do not illustrate, and the mechanical property of production board is not also taken into account.
" non-oriented electrical steel of magnetic property and good mechanical performance and production method " (CN103667879A), its chemical composition and wt% are: C≤0.003%, Si:0.5 ~ 1.5%, Als:0.1 ~ 0.85%, Mn:0.1 ~ 0.9%, S≤0.003%, N≤0.003%, Sn or Nb of add-on≤0.15% or the mixing both it, all the other are Fe and inevitable impurity; And limit Si+Als+Mn 1.5 ~ 2.2%; (Als+Mn)/Si will meet in 0.8 ~ 1.4% scope simultaneously; after Low Temperature Hot Rolling and normalizing, obtain coarse grains, uniform hot-rolled sheet tissue, pickling, cold rolling, recrystallization annealing obtains the cold-reduced sheet that hardness is 110 ~ 140HV5; through final stress relief annealing, iron loss P
1.5/50≤ 2.50 w/kg, magnetic strength B
50>=1.75T, good processability.Document performance level is lower, and only for low frequency electric machine; Only use hardness to characterize processing characteristics, the mechanical performance index such as the intensity of motor high speed rotating are not explained.
In the prior art, the operating frequency of medium-high frequency motor and transformer higher than 50Hz, and obtains power frequency for the preparation of used in high-speed motor and is far longer than 50Hz and even 400Hz especially.With the iron loss under 400Hz and P
1.0/400can not satisfy the demands as guarantee value, the loss situation of material when accurately can not reflect that high-speed electric expreess locomotive works, but also economical not as test condition using very high frequency during test, and the applicant is in order to overcome this deficiency thus, adopts P
1.0/1kand B
5000as the magnetic property guarantee value of used in high-speed motor electrical steel, to provide the data of more close reality, reflection truth.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, new high frequency iron loss guarantee value tolerance concept P is provided
1.0/1k, with true, accurately reflection used in high-speed motor non orientating silicon steel magnetic property, and P
1.0/1k≤ 40w/kg, B
5000>=1.68T, the used in high-speed motor 0.2mm thick non orientating silicon steel of yield tensile ratio between 0.7 ~ 0.73 and production method.
Realize the measure of above-mentioned purpose:
The thick non orientating silicon steel of used in high-speed motor 0.2mm, its component and weight percent content are; C:0.001 ~ 0.025%, Si:2.6 ~ 3.0%, Al:0.25 ~ 0.55%, Mn:0.10 ~ 0.30%, P≤0.015%, S:0.001-0.0025%, N:0.001-0.0025%, all the other are Fe and inevitable impurity; And meet Si
eq=Si+2Al-0.5Mn+2.92P is 3.0 ~ 4.0%.
Preferably: Si
eq3.4 ~ 3.8%.
Produce the method for the thick non orientating silicon steel of used in high-speed motor 0.2mm, its step:
1) employing vacuum induction furnace is divided to smelt, and control 0<C+S+N+O≤0.010%, and cast steel ingot;
2) cogging heating: by Heating Steel Ingots to 850 ~ 1000 DEG C, takes out after insulation 1 ~ 1.5h;
3) through forging post-heating, its heating and temperature control is at 1100 ~ 1150 DEG C, and soaking time is at 50 ~ 70min;
4) carry out hot rolling, control finish rolling finishing temperature at 780 ~ 860 DEG C; Be hot-rolled down to thickness of slab 2.0 ~ 2.5mm;
5) normalizing is carried out: normalizing heating and temperature control, at 950 ~ 1000 DEG C, is incubated 3 ~ 5min;
6) pickling is carried out: acid liquor temperature controls at 80 ~ 100 DEG C;
7) it is cold rolling to carry out first time: accumulative draft controls 68 ~ 80%, and interior thickness is 0.5 ~ 0.8mm;
8) carry out process annealing: its annealing temperature controls at 850 ~ 950 DEG C, annealing time is at 90 ~ 120s, and atmosphere is the gas mixture of H2 and N2, H in gas mixture
2volume content be not less than 30%;
9) second time is carried out cold rolling: its accumulative draft controls 57 ~ 77%, and finished product thickness is at 0.2 ± 0.015mm;
10) carry out finished products: its temperature controls at 920 ~ 980 DEG C, soaking time is 3 ~ 5min, and atmosphere is the gas mixture of H2 and N2, H in gas mixture
2volume content be not less than 30%;
11) carry out routinely cooling, shear, sample preparation, magnetic and mechanical property measure.
Preferably: intermediate anneal temperature is at 880 ~ 920 DEG C.
Preferably: the cold rolling accumulative draft of second time controls 64 ~ 69%.
The effect of each element and key control point in the present invention:
Silicon, aluminium and manganese: its three is main alloy element of the present invention are the prerequisites ensureing finished product magnetic property.Why by silicon equivalent weight (Si
eq) be limited in 3.0 ~ 4.0% scopes, be because silicon, aluminium and manganese can not only reduce high frequency iron loss, require Si
eq>=3.0%, make P
1.0/1k≤ 40w/kg; Si
eq>=4.0% also can make magnetic strength reduce simultaneously, thus requires Si
eq≤ 4.0%, ensure B5000<1.68T; In addition, the present invention is mainly used in high-frequency electric machines, thus also needs to have higher-strength, works as Si
eqcan not ensure during <3.0% that yield tensile ratio is greater than 0.7, works as Si
eqbecause yield tensile ratio is greater than 0.73 during >4.0%, and be difficult to high speed punching.Preferably: silicon equivalent weight (Si
eq) 3.4 ~ 3.8%.
Carbon, sulphur, nitrogen, oxygen: are all impurity elements of the present invention, unfavorable to magnetic property, need strictly to control, therefore require 0<C+S+N+O≤0.010%.
Phosphorus is residual element, unfavorable to magnetic property, requires control P≤0.015%.
Technology controlling and process aspect:
Why the cogging Heating temperature of steel ingot is designed to 850 ~ 1000 DEG C, soaking time controls at 1 ~ 1.5h, main it is considered that steel ingot will be grilled thoroughly on the one hand (be heated to more than 850 DEG C, be incubated more than 1h); Reduce on the other hand scaling loss (temperature control less than 1000 DEG C, be incubated 1.5h within) as far as possible.
Why control at 1100 ~ 1150 DEG C by Heating Steel Ingots temperature, insulation 50 ~ 70min, mainly because lower than 1100 DEG C, rolling pressure is large, is difficult to roll target thickness; Higher than 1150 DEG C, easily separate out MnS, AlN and Cu
2the second phase particles such as S, unfavorable to product performance; Soaking time controls at 50 ~ 70min, mainly in order to promote that secondary crystal grows and hot rolling needs; Why by finishing temperature control at 780 ~ 860 DEG C, mainly lower than 780 DEG C, because rolling pressure causes greatly template bad; Easily produce iron scale higher than 860 DEG C, be unfavorable for pickling.
Why by normalizing heating and temperature control at 950 ~ 1000 DEG C, insulation 3 ~ 5min, mainly because temperature is less than 3min lower than 950 DEG C and soaking time, all can not reach microstructure homogenization; Temperature is greater than 5min higher than 1000 DEG C and soaking time, not only easily separates out second phase particles but also cause energy dissipation, is also unfavorable for rear operation rolling.
Why first time cold rolling accumulative draft is controlled 68 ~ 80%, mainly retrain by raw thickness and interior thickness.Draft is too little, and rolling pass is more, and burden cold rolling is for the second time heavier; Draft is comparatively large, and interior thickness is too small, is unfavorable for forming the cold roller and deformed texture favourable to magnetic property.
Why control at 850 ~ 950 DEG C by intermediate anneal temperature, insulation is 90 ~ 120s, mainly because temperature is less than 90s lower than 850 DEG C and soaking time, can not reach desirable recrystallized structure; Temperature is greater than 120s higher than 950 DEG C and soaking time, cold rolling unfavorable to second time.Preferably: intermediate anneal temperature is 880 ~ 920 DEG C.
Why the cold rolling accumulative draft of second time is controlled 55 ~ 77%, mainly retrain by interior thickness and finished product thickness.Draft is too little, and rolling pass is more, and finished product template is bad on the contrary; Draft is comparatively large, is unfavorable for forming the cold roller and deformed texture favourable to magnetic property.Preferably: the cold rolling accumulative draft of second time controls 64 ~ 69%.
Why control at 920 ~ 980 DEG C by finished products temperature, insulation 3 ~ 5min, mainly because temperature is less than 3min lower than 920 DEG C and soaking time, can not reach recrystallize effect; Temperature is greater than 5min higher than 980 DEG C and soaking time, excessive unfavorable to punching to the grain fineness number of finished product tissue.
The present invention, by controlling silicon equivalent weight 3.0 ~ 4.0% and impurity element 0<C+S+N+O≤0.010%, is to give full play to the advantageous effect of main alloy element in physical metallurgy; By strictly controlling impurity element total amount and process optimization, produce a kind of used in high-speed motor non-oriented electrical steel strip that magnetic property and mechanical property are taken into account.It can reduce high frequency iron loss raising magnetic strength on the one hand and realize having excellent magnetic characteristics, and makes the P under 1000Hz high frequency
1.0/1k≤ 40w/kg; Ensure the high strength of production board on the other hand, meet the service requirements of high-speed electric expreess locomotive.
The present invention compared with prior art, is ensureing magnetic property P
1.0/1k≤ 40w/kg, B
5000under the prerequisite of>=1.68T, take into account mechanical property yield tensile ratio 0.70≤0.73, meet the service requirements manufacturing high-speed electric expreess locomotive iron core.
Accompanying drawing explanation
Fig. 1 is the metallographic structure of the present invention's sample after process annealing;
Fig. 2 be the present invention after secondary cold-rolling interior thickness to finished product iron loss P
1.0/400impact.
Embodiment
Below the present invention is described in detail:
Table 1 is the value list of various embodiments of the present invention and comparative example;
Table 2 is the main technologic parameters list of various embodiments of the present invention and comparative example;
Table 3 is various embodiments of the present invention and the list of comparative example Performance Detection situation.
Various embodiments of the present invention are produced according to following steps:
1) vacuum induction furnace is adopted to smelt, and control 0<C+S+N+O≤0.010%, and cast steel ingot;
2) cogging heating: by Heating Steel Ingots to 850 ~ 1000 DEG C, takes out after insulation 1 ~ 1.5h;
3) through forging post-heating, its heating and temperature control is at 1100 ~ 1150 DEG C, and soaking time is at 50 ~ 70min;
4) carry out hot rolling, control finish rolling finishing temperature at 780 ~ 860 DEG C; Be hot-rolled down to thickness of slab 2.0 ~ 2.5mm;
5) normalizing is carried out: normalizing heating and temperature control, at 950 ~ 1000 DEG C, is incubated 3 ~ 5min;
6) pickling is carried out: acid liquor temperature controls at 80 ~ 100 DEG C;
7) it is cold rolling to carry out first time: accumulative draft controls 68 ~ 80%, and interior thickness is 0.5 ~ 0.8mm;
8) carry out process annealing: its annealing temperature controls at 850 ~ 950 DEG C, annealing time is at 90 ~ 120s, and atmosphere is the gas mixture of H2 and N2, H in gas mixture
2volume content be not less than 30%;
9) second time is carried out cold rolling: its accumulative draft controls 57 ~ 77%, and finished product thickness is at 0.2 ± 0.015mm;
10) carry out finished products: its temperature controls at 920 ~ 980 DEG C, soaking time is 3 ~ 5min, and atmosphere is the gas mixture of H2 and N2, H in gas mixture
2volume content be not less than 30%;
11) carry out routinely cooling, shear, sample preparation, magnetic and mechanical property measure.
The value list (wt%) of table 1 various embodiments of the present invention and comparative example
The main technologic parameters list (one) of table 2 various embodiments of the present invention and comparative example
The main technologic parameters list (two) of table 2 various embodiments of the present invention and comparative example
The main technologic parameters list (three) of table 2 various embodiments of the present invention and comparative example
Table 3 various embodiments of the present invention and the list of comparative example Performance Detection situation
As seen from Table 3, comparative example 1: because of Si
eq=2.96%<3.0% and C+S+N+O=0.0103%>0.010%, causes P
1.0/1k=43.9 > 40w/kg and yield tensile ratio=0.683<0.70, high frequency iron loss is higher and yield tensile ratio is on the low side; Comparative example 2: although C+S+N+O=0.0098%≤0.010%, Si
eq=2.91%<3.0%, causes P
1.0/1k=44.8>40w/kg and yield tensile ratio=0.675<0.70, high frequency iron loss is higher and yield tensile ratio is on the low side; Comparative example 3: although Si
eq=3.03%>3.0%, but C+S+N+O=0.0115% >0.010%, cause P
1.0/1k=44.8>40w/kg and yield tensile ratio=0.694 <0.70, high frequency iron loss is higher and yield tensile ratio is on the low side.Comparative example 17: although C+S+N+O=0.0093%<0.010%, Si
eq=4.22%>4.0%, causes B
5000=1.678<1.68T, magnetic strength is on the low side; Comparative example 18: although C+S+N+O=0.0083%< 0.010%, Si
eq=4.22%>4.0%, causes P
1.0/1k=41.4>40w/kg and yield tensile ratio=0.731>0.73, high frequency iron loss and yield tensile ratio higher; Comparative example 19: because of C+S+N+O=0.0113% > 0.010% and Si
eq=4.70%>4.0%, causes B
5000=1.670<1.68T and yield tensile ratio=0.747>0.73, magnetic strength is on the low side and yield tensile ratio is higher; Comparative example 20: because of C+S+N+O=0.0109%>0.010% and Si
eq=4.83% >4.0%, causes P
1.0/1k=40.3>40w/kg and yield tensile ratio=0.748>0.73, high frequency iron loss and yield tensile ratio higher.Only has Si
eq=3.0 ~ 4.0%, and the embodiment of C+S+N+O≤0.010%, magnetic property (P could be met simultaneously
1.0/1k≤ 40w/kg, B
5000>=1.68T) and mechanical property (0.70≤yield tensile ratio≤0.73) requirement.
Above-described embodiment is only the best and enumerates, and is not the restriction to embodiments of the present invention.
Claims (5)
1. the thick non orientating silicon steel of used in high-speed motor 0.2mm, its component and weight percent content are; C:0.001 ~ 0.025%, Si:2.6 ~ 3.0%, Al:0.25 ~ 0.55%, Mn:0.10 ~ 0.30%, P≤0.015%, S:0.001-0.0025%, N:0.001-0.0025%, all the other are Fe and inevitable impurity; And meet Si
eq=Si+2Al-0.5Mn+2.92P is 3.0 ~ 4.0%.
2. the thick non orientating silicon steel of used in high-speed motor 0.2mm as claimed in claim 1, is characterized in that: Si
eq3.4 ~ 3.8%.
3. produce the method for the thick non orientating silicon steel of used in high-speed motor 0.2mm, its step:
1) vacuum induction furnace is adopted to smelt, and control 0<C+S+N+O≤0.010%, and cast steel ingot;
2) cogging heating: by Heating Steel Ingots to 850 ~ 1000 DEG C, takes out after insulation 1 ~ 1.5h;
3) through forging post-heating, its heating and temperature control is at 1100 ~ 1150 DEG C, and soaking time is at 50 ~ 70min;
4) carry out hot rolling, control finish rolling finishing temperature at 780 ~ 860 DEG C; Be hot-rolled down to thickness of slab 2.0 ~ 2.5mm;
5) normalizing is carried out: normalizing heating and temperature control, at 950 ~ 1000 DEG C, is incubated 3 ~ 5min;
6) pickling is carried out: acid liquor temperature controls at 80 ~ 100 DEG C;
7) it is cold rolling to carry out first time: accumulative draft controls 68 ~ 80%, and interior thickness is 0.5 ~ 0.8mm;
8) carry out process annealing: its annealing temperature controls at 850 ~ 950 DEG C, annealing time is at 90 ~ 120s, and atmosphere is the gas mixture of H2 and N2, H in gas mixture
2volume content be not less than 30%;
9) second time is carried out cold rolling: its accumulative draft controls 57 ~ 77%, and finished product thickness is at 0.2 ± 0.015mm;
10) carry out finished products: its temperature controls at 920 ~ 980 DEG C, soaking time is 3 ~ 5min, and atmosphere is the gas mixture of H2 and N2, H in gas mixture
2volume content be not less than 30%;
11) carry out routinely cooling, shear, sample preparation, magnetic and mechanical property measure.
4. method of producing the thick non orientating silicon steel of used in high-speed motor 0.2mm as claimed in claim 3, is characterized in that: intermediate anneal temperature is at 880 ~ 920 DEG C.
5. method of producing the thick non orientating silicon steel of used in high-speed motor 0.2mm as claimed in claim 3, is characterized in that: the cold rolling accumulative draft of second time controls 64 ~ 69%.
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| CN105886932A (en) * | 2016-05-09 | 2016-08-24 | 武汉钢铁股份有限公司 | Non-oriented silicon steel for high-power-factor motor and production method |
| CN107138525A (en) * | 2017-05-02 | 2017-09-08 | 内蒙古包钢钢联股份有限公司 | The method that think gauge silicon steel raw material is rolled into standard thickness cold-rolled products |
| CN107974543A (en) * | 2017-12-12 | 2018-05-01 | 武汉钢铁有限公司 | A kind of production method of thickness≤0.20mm low temperature high magnetic induction grain-oriented silicon steels |
| CN108411205A (en) * | 2018-04-09 | 2018-08-17 | 内蒙古工业大学 | The method that CSP flows produce high-magnetic induction, low-iron loss non-oriented electrical steel |
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| WO2020204107A1 (en) * | 2019-04-03 | 2020-10-08 | 日本製鉄株式会社 | Electromagnetic steel sheet and method for manufacturing same |
| CN112538592A (en) * | 2020-09-17 | 2021-03-23 | 武汉钢铁有限公司 | Non-oriented silicon steel for high-speed motor with frequency of more than or equal to 10000Hz and production method |
| WO2022176933A1 (en) * | 2021-02-17 | 2022-08-25 | 日本製鉄株式会社 | Non-oriented electromagnetic steel sheet and manufacturing method therefor |
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| CN107138525A (en) * | 2017-05-02 | 2017-09-08 | 内蒙古包钢钢联股份有限公司 | The method that think gauge silicon steel raw material is rolled into standard thickness cold-rolled products |
| CN107974543A (en) * | 2017-12-12 | 2018-05-01 | 武汉钢铁有限公司 | A kind of production method of thickness≤0.20mm low temperature high magnetic induction grain-oriented silicon steels |
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| CN108411205A (en) * | 2018-04-09 | 2018-08-17 | 内蒙古工业大学 | The method that CSP flows produce high-magnetic induction, low-iron loss non-oriented electrical steel |
| CN108411205B (en) * | 2018-04-09 | 2019-07-09 | 内蒙古工业大学 | The method of CSP process production high-magnetic induction, low-iron loss non-oriented electrical steel |
| JPWO2020204107A1 (en) * | 2019-04-03 | 2021-04-30 | 日本製鉄株式会社 | Electrical steel sheet and its manufacturing method |
| WO2020204107A1 (en) * | 2019-04-03 | 2020-10-08 | 日本製鉄株式会社 | Electromagnetic steel sheet and method for manufacturing same |
| JP6863528B2 (en) * | 2019-04-03 | 2021-04-21 | 日本製鉄株式会社 | Electrical steel sheet and its manufacturing method |
| CN111235461A (en) * | 2020-03-04 | 2020-06-05 | 内蒙古科技大学 | High-strength non-oriented electrical steel for rare earth-containing high-carbon new energy drive motor and manufacturing method thereof |
| CN112538592A (en) * | 2020-09-17 | 2021-03-23 | 武汉钢铁有限公司 | Non-oriented silicon steel for high-speed motor with frequency of more than or equal to 10000Hz and production method |
| CN112538592B (en) * | 2020-09-17 | 2022-02-01 | 武汉钢铁有限公司 | Non-oriented silicon steel for high-speed motor with frequency of more than or equal to 10000Hz and production method |
| WO2022176933A1 (en) * | 2021-02-17 | 2022-08-25 | 日本製鉄株式会社 | Non-oriented electromagnetic steel sheet and manufacturing method therefor |
| WO2023090138A1 (en) * | 2021-11-17 | 2023-05-25 | Ｊｆｅスチール株式会社 | Non-oriented electrical steel sheet and method for producing same, and method for producing motor cores |
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