CN104046758A - Short-process efficient cold-rolling preparation method of high-silicon steel thin strip - Google Patents
Short-process efficient cold-rolling preparation method of high-silicon steel thin strip Download PDFInfo
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Abstract
The invention aims at providing a short-process efficient cold-rolling preparation method of a high-silicon steel thin strip. The preparation method is characterized in that the high-silicon steel thin strip is prepared by using a rapid solidification method, and the thickness of the high-silicon steel thin strip is reduced by using a cold rolling method, the surface quality is improved, and the high-frequency magnetic performance is improved; due to rapid solidification, the plasticity of high-silicon steel can be improved, and the thin strip with certain plasticity is obtained and can be wound into a coil; then, cold rolling is carried out, so that the degree of order of the high-silicon steel is further lowered, the plasticity of the high-silicon steel is improved, and a high-silicon steel thin strip coil is obtained; the thin strip obtained through rapid solidification has the advantages that the crystal grain size is obviously reduced, the degree of order is obviously lowered, and the microhardness change is not great, so that next-step cold rolling is facilitated; during cold rolling, the rolling reduction of first-time rolling is controlled, and then, the plasticity is further improved, so that the thin strip with the thinnest thickness of 0.02mm can be obtained. According to the preparation method, the production efficiency of the prepared high-silicon steel thin strip is high, and the product quality of the prepared high-silicon steel thin strip is good, so that the method can be widely implemented industrially and accordingly has a broad application prospect.
Description
Technical field
The present invention is based on technical field of metal material preparation, relate to the rapidly and efficiently short process making method of high silicon steel.
Technical background
High silicon steel refers generally to the silicon steel that silicon content exceedes 3.5% (weight ratio, lower same).Compared with common silicon steel (silicon content≤3.5%), high silicon steel, particularly siliceous 6.5% high silicon steel has higher resistivity and magnetic permeability, the lower feature such as coercive force, the magnetostriction coefficient close to zero, thereby there is lower iron loss and magnetostriction, to reducing energy consumption, to reduce noise significant.
But just because of the raising of silicone content, the non-constant of the temperature-room type plasticity of high silicon steel, is difficult to adopt that traditional heat is cold, this latten of cold rolling process scale operation.Therefore people, by adopting special preparation method, avoid its brittleness at room temperature and prepare this latten, and quick setting method is exactly one wherein.Its feature is exactly to adopt special heat-eliminating medium, makes its rapid solidification under liquid state.G.E.Fish etc. are at Journal of Applied Physics, 64 (10): 5370, in 1988, Frequency dependence of core loss in rapidly quenched Fe-6.5wt.%Si, report is prepared this alloy thin band with rapid solidification method.Directly get rid of band by liquid alloy list roller, obtain thin and narrow alloy thin band.A.H.Kasama etc. are at Materials Science and Engineering A, 449-451:375-377,2007, in Magnetic properties evaluation of spray formed and rolled Fe-6.5wt.%Si-1.0wt.%Al alloy, report utilizes spray-forming method to prepare alloy slab, then adopts hot rolling, cold rolling method to prepare this latten.The sheet material that reaction-injection moulding obtains hot rolling, cold rolling after thermal treatment, can obtain the thin plate that 0.6mm is thick.Wherein cold rollingly at 500 DEG C, carrying out, is not strict room temperature rolling.Because the hole that reaction-injection moulding produces is many, this latten magnetic property obtaining is not ideal.Y.Ono etc. is at Journal of Alloys and Compounds in addition, 289:277-284,1999, in Production process of grain orientation-controlled Fe-6.5mass%Si alloy fiber using spinning in gas atmosphere followed by winding in rotating liquid, report utilizes the method that water spins to prepare this alloy threadlet, can prepare diameter below 100 microns, length exceedes the high silicon steel wire material of 10 meters.Profit can only make wire sample in this way, can not obtain tabular sample.
The high silicon steel thin belt that utilizes quick setting method to prepare, obtaining the controlled high silicon steel thin belt of thickness in conjunction with follow-up cold rolling method is the feature of this patent.Strip prepared by rapid solidification, due to from unordered phase region rapid cooling, has at utmost suppressed the generation of high silicon steel ordered phase and has grown up, and strip has certain bending ability, can be wound around.Strip also has plastic working ability simultaneously, can utilize cold rolling process to carry out following process to strip.Following process not only can improve its surface quality, can also further reduce thickness, further improves high-gradient magnetism energy.Along with the rising of appliance applications frequency, iron core iron loss is serious.High silicon steel thin belt prepared by the present invention is adapted at high frequency and uses, the particularly high frequency more than 10kHz.
Summary of the invention
The object of the present invention is to provide the cold rolling Preparation Method of the high silicon steel thin belt of a kind of short flow high efficiency.Its content is prepared high silicon steel thin belt by quick setting method exactly, reduces its thickness by cold rolling process, and improves surface quality, improves its high-gradient magnetism energy.Rapid solidification can improve the plasticity of high silicon steel, obtains having the strip of certain plasticity, and strip can coiling.Carry out afterwards cold rollingly, further reduce the degree of order of high silicon steel, improve its plasticity, obtain high silicon steel thin belt volume.The strip that rapid solidification obtains, grain-size obviously reduces, and the degree of order obviously reduces, and microhardness changes not quite, this will be conducive to the cold rolling of next step.In cold-rolled process, the draught of controlled rolling the first passage, further improves its plasticity, thereby can obtain the thinnest strip for 0.02mm thickness.
Concrete technical process is:
(1) raw material is prepared: be raw material with technically pure iron (technically pure iron DT0, iron level 99.5%), crystalline silicon (purity is 99.9%), carry out proportioning in the ratio of silicone content 6.5wt.%.
(2) rapid solidification gets rid of band: raw material is added to hot smelting, under fused solution, utilize and get rid of band method by its rapid solidification, obtain the high silicon steel thin belt of thickness at 0.03-0.06mm.
(3) cold rolling: the alloy thin band that rapid solidification is obtained carries out cold rolling, control draught, obtain the thin plate of thickness at 0.02-0.05mm.Cold rolling the first reduction in pass of the present invention is 15～25%, repeatedly cold rolling afterwards, until thickness reaches 0.02-0.05mm.
(4) final thermal treatment: by the cold rolling strip coiling obtaining, insulation layer is coated on surface, after 1100 DEG C, 2～5h insulation annealing, stove is cold, obtains the high silicon steel thin belt of magnetic property excellence.
The invention has the advantages that:
Rapid solidification is got rid of to band method and combine with cold-rolling practice, broken through traditional high silicon steel and be difficult to cold rolling feature.Obtain grain-size by quick setting method tiny, the high silicon steel thin belt that the degree of order is less, has improved the plasticity of high silicon steel, thereby can rolling and carry out cold working.
In the process of strip rapid solidification, the molten metal that pastes roller one side is subject to the chilling action of cooling copper roller and rapid solidification is solid-state.In process of setting, due to volume change, can form small pit at the strip that pastes roller one side.In the side away from copper roller, solidifying of molten metal is comparatively free, and integral surface roughness is large, affects the assembling coefficient of follow-up winding.And cold rolling processing not only can improve the surface quality of strip, improve assembling coefficient, and due to the reduction of thickness, iron loss under its high frequency is further reduced.
When cold rolling, the first passage adopts larger draught, stops the generation of middle crack.Simultaneously, due to larger deflection, further reduce the degree of order of ordered alloy, improve plasticity, below cold rolling carried out smoothly.
The present invention utilizes rapid solidification method, puies forward heavy alloyed deformability, realizes the cold roller and deformed of alloy.Due to rapid solidification, to get rid of band method preparation flow short, and get rid of with high silicon steel thin belt and have certain plasticity, can bending rolling, and there is certain cold working plastic deformation ability, and can be further cold rolling, the strip thickness obtaining is controlled, and surface quality is good.Because its production efficiency is high, good product quality, can be in industrial extensive realization, thereby has broad application prospects.
Brief description of the drawings
The high silicon steel rapid solidification of Fig. 1 cold rolling is for strip operational path
The high silicon steel rapid solidification of Fig. 2 cold rolling contrasts for strip magnetic property
Embodiment
For the high silicon steel of silicone content 6.5wt.%, utilize rapid solidification cold rolling to obtain the high silicon steel thin belt of magnetic property excellence for strip method, strip thickness 0.02-0.05mm, specific embodiments is as follows:
Embodiment 1
Prepare high silicon steel thin belt by quick setting method, utilize cold rolling process further to reduce its thickness, and improve surface quality, improve its high-gradient magnetism energy.In cold-rolled process, the draught of controlled rolling the first passage, further improves its plasticity, thereby can obtain the strip of 0.02mm thickness.Its operational path as shown in Figure 1.
Concrete technical process is:
(1) raw material is prepared: be raw material with technically pure iron (technically pure iron DT0, iron level 99.5%), crystalline silicon (purity is 99.9%), carry out proportioning in the ratio of silicone content 6.5wt.%.
(2) rapid solidification gets rid of band: raw material is added to hot smelting, under fused solution, utilize and get rid of band method by its rapid solidification, obtain the high silicon steel thin belt of thickness at 0.03mm.
(3) cold rolling: the alloy thin band that rapid solidification is obtained carries out cold rolling, control draught, the first reduction in pass is controlled at 15%, obtains the strip that thickness is 0.02mm afterwards after draught per pass 10%, 3 passage.
(4) final thermal treatment: by the cold rolling strip coiling obtaining, insulation layer is coated on surface, after 1100 DEG C, 2h insulation annealing, stove is cold, obtains the high silicon steel thin belt of magnetic property excellence, strip magnetic property: P
0.1/10k=3.9W/kg, P
0.05/10k=1.0W/kg, P
0.05/20k=2.7W/kg, P
0.07/40k=14.5W/kg.
Embodiment 2
Prepare high silicon steel thin belt by quick setting method, utilize cold rolling process further to reduce its thickness, and improve surface quality, improve its high-gradient magnetism energy.In cold-rolled process, the draught of controlled rolling the first passage, further improves its plasticity, thereby can obtain the strip of 0.03mm thickness.As shown in Figure 1, its magnetic property as shown in Figure 2 for its operational path.
(1) raw material is prepared: be raw material with technically pure iron (technically pure iron DT0, iron level 99.5%), crystalline silicon (purity is 99.9%), carry out proportioning in the ratio of silicone content 6.5wt.%.
(2) rapid solidification gets rid of band: raw material is added to hot smelting, under fused solution, utilize and get rid of band method by its rapid solidification, obtain the high silicon steel thin belt of thickness at 0.05mm.
(3) cold rolling: the alloy thin band that rapid solidification is obtained carries out cold rolling, control draught, the first reduction in pass is controlled at 25%, obtains the strip that thickness is 0.03mm afterwards after every time 10%, 3 passage.
(4) final thermal treatment: by the cold rolling strip coiling obtaining, insulation layer is coated on surface, after 1100 DEG C, 3h insulation annealing, stove is cold, obtains the high silicon steel thin belt of magnetic property excellence, strip magnetic property: P
0.1/10k=4.8W/kg, P
0.05/10k=1.3W/kg, P
0.05/20k=3.2W/kg, P
0.07/40k=17.1W/kg.Its magnetic property and the magnetic property cold rolling and strip that chemical vapour deposition (CVD) method prepares contrast as shown in Figure 2.
Embodiment 3
Prepare high silicon steel thin belt by quick setting method, utilize cold rolling process further to reduce its thickness, and improve surface quality, improve its high-gradient magnetism energy.In cold-rolled process, the draught of controlled rolling the first passage, further improves its plasticity, thereby can obtain the strip of 0.05mm thickness.Its operational path as shown in Figure 1.
(1) raw material is prepared: be raw material with technically pure iron (technically pure iron DT0, iron level 99.5%), crystalline silicon (purity is 99.9%), carry out proportioning in the ratio of silicone content 6.5wt.%.
(2) rapid solidification gets rid of band: raw material is added to hot smelting, under fused solution, utilize and get rid of band method by its rapid solidification, obtain the high silicon steel thin belt of thickness at 0.06mm.
(3) cold rolling: the alloy thin band that rapid solidification is obtained carries out cold rolling, control draught, the first reduction in pass is controlled at 20%, obtains the strip that thickness is 0.05mm.
(4) final thermal treatment: by the cold rolling strip coiling obtaining, insulation layer is coated on surface, after 1100 DEG C, 5h insulation annealing, stove is cold, obtains the high silicon steel thin belt of magnetic property excellence, strip magnetic property: P
0.1/10k=5.5W/kg, P
0.05/10k=1.8W/kg, P
0.05/20k=4.0W/kg, P
0.07/40k=21.8W/kg.
Claims (1)
1. a cold rolling Preparation Method for the high silicon steel thin belt of short flow high efficiency, is characterized in that preparing high silicon steel thin belt by quick setting method, utilizes subsequently cold rolling process further to reduce its thickness, improves surface quality, improves high-gradient magnetism energy; In cold-rolled process, the draught of controlled rolling the first passage, further improves its plasticity, thereby can obtain the strip of the controlled scope of thickness at 0.02-0.05mm thickness; Concrete technical process is:
(1) raw material is prepared: taking technically pure iron, crystalline silicon as raw material, carry out proportioning in the ratio of silicone content 6.5wt.%; Technically pure iron: iron level 99.5%, crystalline silicon purity is 99.9%;
(2) rapid solidification gets rid of band: raw material is added to hot smelting, under fused solution, utilize and get rid of band method by its rapid solidification, obtain the high silicon steel thin belt of thickness at 0.03-0.06mm;
(3) cold rolling: the alloy thin band that rapid solidification is obtained carries out cold rolling, control draught, obtain the thin plate of thickness at 0.02-0.05mm; Cold rolling the first reduction in pass of the present invention is 15～25%, repeatedly cold rolling afterwards, until thickness reaches 0.02-0.05mm;
(4) final thermal treatment: by the cold rolling strip coiling obtaining, insulation layer is coated on surface, after 1100 DEG C, 2～5h insulation annealing, stove is cold, obtains the high silicon steel thin belt of magnetic property excellence.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282501A (en) * | 2016-09-27 | 2017-01-04 | 北京科技大学 | A kind of heat treatment method of rapid solidification height silicon steel thin belt |
| CN106957948A (en) * | 2017-04-19 | 2017-07-18 | 北京科技大学 | A kind of boron-containing high-silicon steel strip and preparation method thereof |
| CN111069287A (en) * | 2019-12-25 | 2020-04-28 | 北京科技大学 | High-silicon steel plate strip and preparation method thereof |
| CN112846118A (en) * | 2021-01-05 | 2021-05-28 | 北京科技大学 | Method for preparing high-magnetic-performance phosphorus-containing silicon steel thin strip by using strip throwing method |
| CN114807559A (en) * | 2022-05-09 | 2022-07-29 | 国网智能电网研究院有限公司 | Low-loss low-magnetostriction oriented silicon steel material and preparation method thereof |
| CN115821166A (en) * | 2022-11-17 | 2023-03-21 | 华誉智造(上海)新材料有限公司 | Rollable high-silicon steel strip and preparation and application thereof |
| WO2023100765A1 (en) * | 2021-11-30 | 2023-06-08 | 学校法人トヨタ学園 | Method for producing thin silicon steel strip |
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| JPH03285018A (en) * | 1990-03-30 | 1991-12-16 | Nippon Steel Corp | Manufacture of grain-oriented high magnetic flux density magnetic steel sheet |
| JPH05279741A (en) * | 1991-12-26 | 1993-10-26 | Nippon Steel Corp | Manufacture of grain-oriented silicon steel sheet |
| CN101049669A (en) * | 2007-05-14 | 2007-10-10 | 北京科技大学 | Preparation method for cold rolling sheet of duriron |
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Patent Citations (3)
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| JPH03285018A (en) * | 1990-03-30 | 1991-12-16 | Nippon Steel Corp | Manufacture of grain-oriented high magnetic flux density magnetic steel sheet |
| JPH05279741A (en) * | 1991-12-26 | 1993-10-26 | Nippon Steel Corp | Manufacture of grain-oriented silicon steel sheet |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282501A (en) * | 2016-09-27 | 2017-01-04 | 北京科技大学 | A kind of heat treatment method of rapid solidification height silicon steel thin belt |
| CN106957948A (en) * | 2017-04-19 | 2017-07-18 | 北京科技大学 | A kind of boron-containing high-silicon steel strip and preparation method thereof |
| CN111069287A (en) * | 2019-12-25 | 2020-04-28 | 北京科技大学 | High-silicon steel plate strip and preparation method thereof |
| CN112846118A (en) * | 2021-01-05 | 2021-05-28 | 北京科技大学 | Method for preparing high-magnetic-performance phosphorus-containing silicon steel thin strip by using strip throwing method |
| CN112846118B (en) * | 2021-01-05 | 2022-03-25 | 北京科技大学 | Method for preparing high-magnetic-performance phosphorus-containing silicon steel thin strip by using strip throwing method |
| WO2023100765A1 (en) * | 2021-11-30 | 2023-06-08 | 学校法人トヨタ学園 | Method for producing thin silicon steel strip |
| CN114807559A (en) * | 2022-05-09 | 2022-07-29 | 国网智能电网研究院有限公司 | Low-loss low-magnetostriction oriented silicon steel material and preparation method thereof |
| CN114807559B (en) * | 2022-05-09 | 2023-07-18 | 国网智能电网研究院有限公司 | Low-loss low-magnetostriction oriented silicon steel material and preparation method thereof |
| CN115821166A (en) * | 2022-11-17 | 2023-03-21 | 华誉智造(上海)新材料有限公司 | Rollable high-silicon steel strip and preparation and application thereof |
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