CN113943884A - Preparation method of multi-component {100} texture non-oriented electrical steel - Google Patents
Preparation method of multi-component {100} texture non-oriented electrical steel Download PDFInfo
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- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 238000000137 annealing Methods 0.000 claims abstract description 63
- 230000006698 induction Effects 0.000 claims abstract description 32
- 238000011084 recovery Methods 0.000 claims abstract description 30
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000009749 continuous casting Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000005097 cold rolling Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000005266 casting Methods 0.000 claims description 19
- 238000003723 Smelting Methods 0.000 claims description 14
- 238000004321 preservation Methods 0.000 claims description 13
- 238000005554 pickling Methods 0.000 claims description 7
- 230000002441 reversible effect Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 238000001953 recrystallisation Methods 0.000 abstract description 5
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000013078 crystal Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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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
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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
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- 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
- 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
Abstract
The invention relates to the technical field of metallurgy, in particular to a preparation method of multi-component {100} texture non-oriented electrical steel. The method comprises the steps of preparing a non-oriented electrical steel cast strip with the thickness of 1.5-2.5 mm by controlling strip continuous casting parameters, directly cold-rolling the cast strip until the thickness is 0.35-0.50 mm, then performing pre-recovery annealing, and then performing finished product annealing, wherein the annealing temperature, time and heating and cooling rates are controlled in the process. The non-oriented electrical steel prepared by the invention has a multi-component {100} texture, and comprises {100} <001>, {100} <012> and {100} <011>, {100} texture components, the volume fraction of which reaches 25-39%, the rolling direction magnetic induction value is 1.71-1.78T, the transverse magnetic induction value is 1.70-1.76T, and the magnetic induction value in the 45-degree direction of the plate surface reaches 1.65-1.67T. The invention obviously enhances the {100} annealing texture by optimizing the annealing process and utilizing the synergistic effect of strong recovery and recrystallization of the {100} deformed texture, and the method is simple and effective.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a preparation method of multi-component {100} texture non-oriented electrical steel.
Background
The non-oriented electrical steel is an important iron core material of equipment such as a motor, a generator and the like. The properties of non-oriented electrical steel mainly include magnetic induction, iron loss and magnetic anisotropy, which directly affect the energy conversion efficiency of equipment. The magnetic induction of non-oriented electrical steel is mainly influenced by crystal texture, wherein the <001> crystal orientation is easy magnetization direction, and the <111> crystal orientation is hard magnetization direction. Therefore, the {100} texture is an ideal texture for non-oriented electrical steel. However, in the conventional flow mainly comprising thick slab continuous casting and thin slab continuous casting and rolling, the initial {100} texture is difficult to maintain due to severe hot rolling reduction, and strong gamma (<111 >/ND) and alpha ({11h } < 121/h >) magnetic unfavorable textures exist in a final annealed sheet, so that the magnetic induction value of the existing non-oriented electrical steel has a larger distance from the saturation magnetic induction intensity of the material. Therefore, the search for a novel production method of {100} texture is an important direction for improving non-oriented electrical steel.
The double-roller thin strip continuous casting is a sub-rapid solidification technology, and molten steel can be directly solidified into a thin strip with the thickness of 1-5 mm after passing through two rotating casting rollers and is directly used for a subsequent cold rolling process. Compared with the conventional process, the process for preparing the non-oriented electrical steel by the strip continuous casting process can save a serious hot rolling process and has the advantages of energy conservation and environmental protection. In addition, the patent published at present shows that the strip casting has obvious advantages in the aspect of preparing {100} texture non-oriented electrical steel, and the magnetic induction is greatly improved. However, it is worth noting that the {100} texture of the non-oriented electrical steel annealed plate prepared by the prior art only contains Cube ({100} <001>) components and strong Goss ({110} <001>) components, so that the non-oriented electrical steel is rolled to have larger magnetic property difference, namely large magnetic anisotropy, in the direction of 45 degrees with the plate surface. This is disadvantageous for non-oriented electrical steels that require isotropy. In fact, the thin-strip continuous casting non-oriented electrical steel cold-rolled plate also has more non-Cube-oriented {100} textures, such as {100} <011> and {100} <012> components, and the components have <100> crystal orientation which is easy to magnetize in the direction of 25-45 degrees of the plate surface, thereby being beneficial to weakening magnetic anisotropy. However, such texture components are difficult to be effectively converted into the {100} annealed structure in the continuous annealing process, so that the electrical steel has large magnetic anisotropy in the circumferential direction. In conclusion, the prior art approaches are still insufficient for the preparation of multi-component {100} textured nonoriented electrical steels with low magnetic anisotropy.
Disclosure of Invention
In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a method for producing a multi-component {100} texture non-oriented electrical steel, which can improve magnetic induction and reduce magnetic anisotropy.
The technical scheme of the invention is as follows:
a preparation method of multi-component {100} texture non-oriented electrical steel comprises the following steps:
(1) smelting and continuous casting: smelting molten steel according to set components, wherein the molten steel comprises the following chemical components in percentage by mass: 1.0-3.0% of Si, 0.3-0.5% of Al, 0.1-0.3% of Mn, 0.02-0.08% of P, less than or equal to 0.004% of C and the balance of Fe; obtaining a casting strip with the thickness of 1.5-2.5 mm by using a strip casting machine, wherein the superheat degree of molten steel is 30-50 ℃ during casting;
(2) rolling: after removing oxide scales from the cast strip by acid pickling, cold rolling the cast strip to a cold-rolled plate with the thickness of 0.35-0.50 mm by using a four-roller reversible rolling mill, wherein the single-pass reduction rate is 20-30%;
(3) pre-recovery annealing: pre-recovery annealing is carried out on the cold-rolled sheet, the annealing temperature is 400-500 ℃, and the heat preservation time is 10-30 min;
(4) annealing of a finished product: and annealing the pre-recovery annealed plate to obtain a finished product, wherein the annealing temperature is 900-1000 ℃, and the heat preservation time is 6-10 min.
According to the preparation method of the multi-component {100} texture non-oriented electrical steel, in the step (3), the temperature rise rate during pre-recovery annealing is more than or equal to 30 ℃/s, and the cooling rate is 20-40 ℃/s.
According to the preparation method of the multi-component {100} texture non-oriented electrical steel, in the step (4), the temperature rise rate of the finished product during annealing is more than or equal to 30 ℃/s, and the cooling rate is less than or equal to 40 ℃/s.
According to the preparation method of the multi-component {100} texture non-oriented electrical steel, in the step (4), the multi-component {100} texture exists in the non-oriented electrical steel finished product annealing plate, and the volume fraction of the components of the {100} <001>, {100} <012> and {100} <011>, {100} texture is 25-39%.
According to the preparation method of the multi-component {100} texture non-oriented electrical steel, in the step (4), the roll-direction magnetic induction value of the finished product annealed sheet of the non-oriented electrical steel is 1.71-1.78T, the transverse magnetic induction value is 1.70-1.76T, and the magnetic induction value in the 45-degree direction of the sheet surface is 1.65-1.67T.
The design idea of the invention is as follows:
firstly, preparing a non-oriented electrical steel cast strip with strong {100} texture and moderate thickness by controlling a strip continuous casting process, and obtaining more multi-component {100} deformation structures in a cold-rolled sheet by utilizing tissue inheritance; secondly, the stored energy of the large-size {100} deformation structure is reduced through pre-recovery annealing, the incubation period of strong recovery (or continuous recrystallization) of the large-size {100} deformation structure is shortened, and then the strong recovery of the {100} structures such as {100} <011>, {100} <012> and the like and the recrystallization of Cube structures are simultaneously realized, so that a multi-component {100} annealing texture is obtained, and the circumferential homogenization of the high magnetic induction of the non-oriented electrical steel is realized.
Compared with the prior art, the invention has the characteristics and beneficial effects that:
(1) according to the technical scheme, the initial structure of the cast strip is controlled, and a simple recovery annealing process is introduced to regulate and control the final recrystallization texture of the non-oriented electrical steel, so that the method is simple.
(2) The technical scheme of the invention solves the difficult problem that the {100} deformation zone is difficult to recrystallize, such as {100} <011>, {100} <012> and the like, realizes the efficient conversion of the {100} deformation structure to the {100} annealing structure through strong recovery, and prepares the non-oriented electrical steel with a multi-component {100} texture.
(3) The non-oriented electrical steel {100} texture obtained by the technical scheme of the invention has a high percentage of occupation, and the circumferential magnetic anisotropy is effectively improved.
Drawings
FIG. 1 is a microstructure of a non-oriented electrical steel prepared in example 3 of the present invention.
FIG. 2 is a recrystallized texture of a nonoriented electrical steel prepared in example 3 of the present invention.
FIG. 3 is a microstructure of a non-oriented electrical steel prepared in comparative example 1 of the present invention.
FIG. 4 is a recrystallized texture of a nonoriented electrical steel prepared according to comparative example 1 of the present invention.
Detailed Description
In the specific implementation process, the non-oriented electrical steel casting strip with the thickness of 1.5-2.5 mm is prepared by controlling strip continuous casting parameters, and is subjected to pre-recovery annealing and finished product annealing after being directly cold-rolled to the thickness of 0.35-0.50 mm, wherein the annealing temperature, time and heating and cooling rates are controlled in the process. The non-oriented electrical steel prepared by the invention has a multi-component {100} texture, comprises {100} <001>, {100} <012> and {100} <011>, {100} texture components in a proportion of 25-39%, and has a rolling direction magnetic induction value of 1.71-1.78T, a transverse magnetic induction value of 1.70-1.76T, and a magnetic induction value of 1.65-1.67T in a 45-degree direction of a plate surface.
The present invention is further illustrated in detail by the following examples and comparative examples.
Example 1
In this example, the preparation method of the multi-component {100} texture non-oriented electrical steel is as follows:
(1) smelting and continuous casting: smelting molten steel according to the components, wherein the molten steel comprises the following chemical components in percentage by mass: si 1.2%, Al 0.3%, Mn 0.1%, P0.03%, C0.0025%, and the balance Fe. A casting strip with the thickness of 1.60mm is obtained by utilizing a thin strip caster, and the superheat degree of molten steel is 30 ℃ during casting.
(2) Rolling: and (3) pickling the cast strip to remove the iron scale, and cold-rolling the cast strip to a cold-rolled plate with the thickness of 0.35mm by using a four-roller reversible rolling mill, wherein the single-pass reduction rate is 20-30%.
(3) Pre-recovery annealing: and (3) pre-recovery annealing is carried out on the cold-rolled sheet, the annealing temperature is 500 ℃, the heat preservation time is 10min, the heating rate is 35 ℃/s, and the cooling rate is 20 ℃/s.
(4) Annealing of a finished product: and (3) annealing the pre-recovery annealing plate to obtain a finished product, wherein the annealing temperature is 900 ℃, the heat preservation time is 10min, the heating rate is 40 ℃/s, and the cooling rate is 20 ℃/s.
In this example, the obtained finished annealed sheet of non-oriented electrical steel was a multi-component {100} texture including {100} <001>, {100} <012> and {100} <011>, {100} texture components in a volume fraction of 29%. The rolling direction magnetic induction value is 1.78T, the transverse magnetic induction value is 1.76T, and the magnetic induction value in the 45-degree direction of the plate surface is 1.67T.
Example 2
In this example, the preparation method of the multi-component {100} texture non-oriented electrical steel is as follows:
(1) smelting and continuous casting: smelting molten steel according to the components, wherein the molten steel comprises the following chemical components in percentage by mass: si 1.2%, Al 0.3%, Mn 0.1%, P0.03%, C0.0032%, and the balance Fe. A casting strip with the thickness of 1.60mm is obtained by utilizing a thin strip caster, and the superheat degree of molten steel is 30 ℃ during casting.
(2) Rolling: and (3) pickling the cast strip to remove the iron scale, and cold-rolling the cast strip to a cold-rolled plate with the thickness of 0.35mm by using a four-roller reversible rolling mill, wherein the single-pass reduction rate is 20-30%.
(3) Pre-recovery annealing: and (3) pre-recovery annealing is carried out on the cold-rolled sheet, the annealing temperature is 400 ℃, the heat preservation time is 30min, the heating rate is 35 ℃/s, and the cooling rate is 20 ℃/s.
(4) Annealing of a finished product: and (3) annealing the pre-recovery annealing plate to obtain a finished product, wherein the annealing temperature is 900 ℃, the heat preservation time is 10min, the heating rate is 40 ℃/s, and the cooling rate is 20 ℃/s.
In this example, the obtained finished annealed sheet of non-oriented electrical steel was a multi-component {100} texture including {100} <001>, {100} <012> and {100} <011>, {100} texture components in a volume fraction of 25%. The rolling direction magnetic induction value is 1.77T, the transverse magnetic induction value is 1.76T, and the magnetic induction value in the 45-degree direction of the plate surface is 1.65T.
Example 3
In this example, the preparation method of the multi-component {100} texture non-oriented electrical steel is as follows:
(1) smelting and continuous casting: smelting molten steel according to the components, wherein the molten steel comprises the following chemical components in percentage by mass: 2.8% of Si, 0.5% of Al, 0.3% of Mn, 0.08% of P, 0.0018% of C and the balance of Fe. A casting strip with the thickness of 2.5mm is obtained by utilizing a thin strip caster, and the superheat degree of molten steel is 50 ℃ during casting.
(2) Rolling: and (3) pickling the cast strip to remove the iron scale, and cold-rolling the cast strip to a cold-rolled plate with the thickness of 0.50mm by using a four-roller reversible rolling mill, wherein the single-pass reduction rate is 20-30%.
(3) Pre-recovery annealing: and (3) pre-recovery annealing is carried out on the cold-rolled sheet, the annealing temperature is 500 ℃, the heat preservation time is 10min, the heating rate is 30 ℃/s, and the cooling rate is 35 ℃/s.
(4) Annealing of a finished product: and (3) annealing the pre-recovery annealing plate to obtain a finished product, wherein the annealing temperature is 1000 ℃, the heat preservation time is 6min, the heating rate is 30 ℃/s, and the cooling rate is 30 ℃/s.
The structure of the non-oriented silicon steel sheet obtained in this example is shown in fig. 1, and the annealing texture is shown in fig. 2. As can be seen from FIGS. 1 and 2, the non-oriented electrical steel prepared by the method has more large-sized grains, the length-diameter ratio of the grains is larger, and the appearance of the grains is different from that of the conventional recrystallized grains, and the grains belong to strong recovery. The texture of the annealed plate is a multi-component {100} texture comprising {100} <001>, {100} <012> and {100} <011> components, and the volume fraction of the {100} texture components reaches 39%. The rolling direction magnetic induction value is 1.73T, the transverse magnetic induction value is 1.71T, the 45-degree direction magnetic induction value of the plate surface is 1.67T, and the magnetic anisotropy is small.
Example 4
In this example, the preparation method of the multi-component {100} texture non-oriented electrical steel is as follows:
(1) smelting and continuous casting: smelting molten steel according to the components, wherein the molten steel comprises the following chemical components in percentage by mass: 2.8% of Si, 0.5% of Al, 0.3% of Mn, 0.08% of P, 0.0027% of C and the balance of Fe. A casting strip with the thickness of 2.5mm is obtained by utilizing a thin strip caster, and the superheat degree of molten steel is 50 ℃ during casting.
(2) Rolling: and (3) pickling the cast strip to remove the iron scale, and cold-rolling the cast strip to a cold-rolled plate with the thickness of 0.50mm by using a four-roller reversible rolling mill, wherein the single-pass reduction rate is 20-30%.
(3) Pre-recovery annealing: and (3) pre-recovery annealing is carried out on the cold-rolled sheet, the annealing temperature is 500 ℃, the heat preservation time is 30min, the heating rate is 30 ℃/s, and the cooling rate is 20 ℃/s.
(4) Annealing of a finished product: and (3) annealing the pre-recovery annealing plate to obtain a finished product, wherein the annealing temperature is 1000 ℃, the heat preservation time is 6min, the heating rate is 30 ℃/s, and the cooling rate is 30 ℃/s.
In this example, the obtained annealed sheet of the finished nonoriented electrical steel had a multicomponent {100} texture including {100} <001>, {100} <012> and {100} <011>, {100} texture components in a volume fraction of 31%. The rolling direction magnetic induction value is 1.72T, the transverse magnetic induction value is 1.71T, and the magnetic induction value in the 45-degree direction of the plate surface is 1.65T.
Comparative example 1
In this comparative example, the preparation method of the multi-component {100} texture non-oriented electrical steel is as follows:
(1) smelting and continuous casting: smelting molten steel according to the components, wherein the molten steel comprises the following chemical components in percentage by mass: 2.8% of Si, 0.5% of Al, 0.3% of Mn, 0.08% of P, 0.0023% of C and the balance of Fe. A casting strip with the thickness of 2.5mm is obtained by utilizing a thin strip caster, and the superheat degree of molten steel is 50 ℃ during casting.
(2) Rolling: and (3) pickling the cast strip to remove the iron scale, and cold-rolling the cast strip to a cold-rolled plate with the thickness of 0.50mm by using a four-roller reversible rolling mill, wherein the single-pass reduction rate is 20-30%.
(3) Annealing of a finished product: and annealing the cold-rolled sheet to obtain a finished product, wherein the annealing temperature is 1000 ℃, the heat preservation time is 6min, the heating rate is 30 ℃/s, and the cooling rate is 30 ℃/s.
In the comparative example, the structure of the obtained non-oriented electrical steel sheet is shown in fig. 3, and the recrystallized texture is shown in fig. 4. As can be seen from fig. 3 and 4, the {100} texture is only a strong {100} <001> component, and the volume fraction of the {100} texture component is only 18.7%. Compared with the non-oriented electrical steel in example 3, the {100} component is single, and the content is reduced by 20.3%. The magnetic induction value in the 45 DEG direction of the plate surface was only 1.63T, which is lower than that of example 3.
The results of the embodiment and the comparative example show that the annealing process is optimized, and the strong recovery and recrystallization synergistic effect of the {100} deformed structure is utilized, so that the {100} annealed texture is obviously enhanced, and the method is simple and effective.
Claims (5)
1. A preparation method of multi-component {100} texture non-oriented electrical steel is characterized by comprising the following steps:
(1) smelting and continuous casting: smelting molten steel according to set components, wherein the molten steel comprises the following chemical components in percentage by mass: 1.0-3.0% of Si, 0.3-0.5% of Al, 0.1-0.3% of Mn, 0.02-0.08% of P, less than or equal to 0.004% of C and the balance of Fe; obtaining a casting strip with the thickness of 1.5-2.5 mm by using a strip casting machine, wherein the superheat degree of molten steel is 30-50 ℃ during casting;
(2) rolling: after removing oxide scales from the cast strip by acid pickling, cold rolling the cast strip to a cold-rolled plate with the thickness of 0.35-0.50 mm by using a four-roller reversible rolling mill, wherein the single-pass reduction rate is 20-30%;
(3) pre-recovery annealing: pre-recovery annealing is carried out on the cold-rolled sheet, the annealing temperature is 400-500 ℃, and the heat preservation time is 10-30 min;
(4) annealing of a finished product: and annealing the pre-recovery annealed plate to obtain a finished product, wherein the annealing temperature is 900-1000 ℃, and the heat preservation time is 6-10 min.
2. The method for preparing the multi-component {100} texture non-oriented electrical steel as claimed in claim 1, wherein in the step (3), the temperature rise rate during pre-recovery annealing is not less than 30 ℃/s, and the cooling rate is 20-40 ℃/s.
3. The method for preparing the multi-component {100} texture non-oriented electrical steel as claimed in claim 1, wherein in the step (4), the temperature rise rate during annealing of the finished product is not less than 30 ℃/s, and the cooling rate is not more than 40 ℃/s.
4. The method for preparing the multi-component {100} textured nonoriented electrical steel as claimed in claim 1, wherein in the step (4), the multi-component {100} texture exists in the finished product annealed sheet of the nonoriented electrical steel, and the volume fraction of the components of the {100} <001>, {100} <012> and {100} <011>, {100} texture is 25-39%.
5. The preparation method of the multi-component {100} texture non-oriented electrical steel as claimed in claim 1, wherein in the step (4), the rolled-direction magnetic induction value of the finished non-oriented electrical steel product annealed plate is 1.71-1.78T, the transverse magnetic induction value is 1.70-1.76T, and the magnetic induction value of the plate surface in the 45-degree direction is 1.65-1.67T.
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| US20140216606A1 (en) * | 2012-03-27 | 2014-08-07 | Nam-Hoe Heo | Non-oriented Electrical Steel Strip Having Excellent Magnetic Properties and Production Method Thereof |
| CN107245644A (en) * | 2017-05-10 | 2017-10-13 | 东北大学 | Based on the high magnetic strength of thin strap continuous casting, low iron loss Thin Specs non-orientation silicon steel preparation method |
| CN108277335A (en) * | 2018-01-29 | 2018-07-13 | 东北大学 | A method of enhancing thin strap continuous casting non-orientation silicon steel { 100 } recrystallization texture |
| CN110923581A (en) * | 2019-11-26 | 2020-03-27 | 长春工业大学 | Method for preparing high-magnetic-induction non-oriented silicon steel based on pre-annealing |
| CN112877527A (en) * | 2021-01-11 | 2021-06-01 | 长春工业大学 | Method for preparing high-strength non-oriented electrical steel based on critical deformation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140216606A1 (en) * | 2012-03-27 | 2014-08-07 | Nam-Hoe Heo | Non-oriented Electrical Steel Strip Having Excellent Magnetic Properties and Production Method Thereof |
| CN107245644A (en) * | 2017-05-10 | 2017-10-13 | 东北大学 | Based on the high magnetic strength of thin strap continuous casting, low iron loss Thin Specs non-orientation silicon steel preparation method |
| CN108277335A (en) * | 2018-01-29 | 2018-07-13 | 东北大学 | A method of enhancing thin strap continuous casting non-orientation silicon steel { 100 } recrystallization texture |
| CN110923581A (en) * | 2019-11-26 | 2020-03-27 | 长春工业大学 | Method for preparing high-magnetic-induction non-oriented silicon steel based on pre-annealing |
| CN112877527A (en) * | 2021-01-11 | 2021-06-01 | 长春工业大学 | Method for preparing high-strength non-oriented electrical steel based on critical deformation |
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