CN104630619B - The high silicon steel of a kind of CSP production and preparation method - Google Patents

The high silicon steel of a kind of CSP production and preparation method Download PDF

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Publication number
CN104630619B
CN104630619B CN201510066055.7A CN201510066055A CN104630619B CN 104630619 B CN104630619 B CN 104630619B CN 201510066055 A CN201510066055 A CN 201510066055A CN 104630619 B CN104630619 B CN 104630619B
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rolling
temperature
less
column crystal
silicon steel
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CN104630619A (en
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欧阳页先
冯大军
骆忠汉
柳志敏
刘义滔
王春锋
万政武
李大明
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Wuhan Iron and Steel Co Ltd
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Wuhan Iron and Steel Group Corp
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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
    • 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
    • C21D8/1227—Warm rolling
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

The high silicon steel that a kind of CSP produces, its component and wt% be: C≤0.003%, Si:4.5% ~ 7.0%, Mn:0.25% ~ 1.0%, Al≤0.008%, S≤0.0050%, N≤0.0030%, [O]≤20PPm；Preparation method: smelt；Casting；Strand heats；Rolling；Batch；Bell furnace is incubated；Warm-rolling, i.e. cold rolling at temperature is 150 DEG C ~ 500 DEG C；High annealing.The present invention, in existing CSP equipment Foundations, uses suitable casting process, improves column crystal ratio, reduces column crystal size；Hot rolling technology is controlled, it is thus achieved that thinner bacillar structure, it is ensured that the rolling of warm-rolling.The present invention can production and processing type and the good high silicon steel of magnetic property.

Description

The high silicon steel of a kind of CSP production and preparation method
Technical field
The present invention relates to a kind of silicon steel and production method, specifically belong to the high silicon that a kind of CSP produces Steel and preparation method.
Background technology
Although the use frequency improving iron core can make motor working efficiency be improved significantly, and can be dramatically reduced The dimension and weight of iron core.But the raising of frequency can bring iron loss to increase with exponential form, and energy loses the most in a large number, also results in Magnetostriction increasing, noise drastically lift-rising is so that environment is by serious sound pollution.Its constrain motor high frequency and Miniaturization.
Along with the increase of silicone content, resistivity increases, and iron loss is gradually reduced, the iron loss when silicone content reaches 6～8%SiWt Minimum.Along with the increase of silicone content, permeability increases, and maximum occurs when 6.5%SiWt.The magnetic hysteresis of high silicon steel is stretched several It is zero.High silicon steel has the most superior magnetic when the magnetization (higher than 1000HZ) in high-frequency range compared with traditional silicon steel disc Learning performance, i.e. iron loss low 40～70%, magnetostriction is almost nil, high several times～tens times of permeability,
But, along with the increase of silicone content, processing under low temperature is become the most difficult, is i.e. difficult to be prepared as product. In order to improve its processing type, currently mainly there is following several preparation method:
1, deposition-diffusion method, is i.e. enriched with Si by various sedimentations such as CVD, PCVD, electrophoretic depositions at substrate4+, then lead to Cross High temperature diffusion, form the high silicon steel that surface silicon content is high.But, there is internal component and tissue odds in its product prepared Even, the uniformity of magnetic property is had an impact.It addition, process equipment is required high by this sedimentation, deposition medium SiCl4 etc. is to ring Environment pollution is the biggest.
2, powder metallurgic method, after i.e. being mixed by Fe powder and Si powder, compressing after annealing, siliconising are annealed, this kind of method pair Pore is difficult to control to being mingled with, and uniform in material also is difficult to ensure.
3, quick quenching technique, gets rid of band on single roller or double roller and directly gets rid of into amorphous height silicon strip, its surface quality and plate from liquid Type is poor, preparation difficulty.
4, controlled rolling method, carries out toughness reinforcing by such as the elements such as Ni, Ti, Cr, B, CU unit to material, the steel band manufactured in this way There is surface configuration good, the width of product and the wide feature of thickness range, but the interpolation of alloying element, affect to a certain extent Magnetic property.
The present invention is that flow process is short, steel billet is not required to be cooled to room temperature, technique is adjusted not having merely with CSP Energy-conservation power is strong, hot rolled plate good plate cut and the advantage of low cost, and by the casting process of the application, reduce column crystal size, And mate suitable hot rolling technology, it is thus achieved that and preferably bacillar structure, prepare magnetic property and the good high silicon steel of processing characteristics.
Through retrieval, Chinese Patent Application No. is the document of 200710099130.5, it discloses one " high silicon plate Cold rolling process ", though its can cold rolling for high silicon steel, but complex process, be not suitable for producing in enormous quantities.
Summary of the invention
The present invention is directed to internal component and uneven microstructure that prior art exists, it is right to have an impact the uniformity of magnetic property Process equipment requires high, and environmental pollution is the biggest or pore and being mingled with is difficult to control to, or surface quality and template poor, The deficiency of preparation difficulty, it is provided that a kind of column crystal volume ratio is not less than 90%, it is thus achieved that thinner bacillar structure, processing type and Magnetic property good siliceous 4.5 ~ 7% high silicon steel and preparation method thereof.
Realize the measure of above-mentioned purpose:
The high silicon steel that a kind of CSP produces, its component and weight percent content be: C≤0.003%, Si: 4.5% ~ 7.0%, Mn:0.25% ~ 1.0%, Al≤0.008%, S≤0.0050%, N≤0.0030%, [O]≤20PPm, its Remaining is Fe and inevitable impurity；Column crystal size≤1mm, column crystal ratio is not less than 90%, for bacillar structure.
The method preparing the high silicon steel that a kind of CSP produces, its step:
1) smelt by mentioned component；
2) casting, during it, control superheat of liquid steel is at 10 DEG C ~ 30 DEG C, and the rate of cooling of secondary cooling water section is not Less than 100 DEG C/min, carrying out wick-containing pressure after the solidification amount of molten steel reaches 10 ~ 30%, reduction ratio controls 5 ~ 25%, and controls Column crystal size≤1mm in strand, column crystal ratio is not less than 90%；
3) carry out strand heating, control heating-up temperature at 1100 DEG C ~ 1180 DEG C；
4) rolling, control finishing temperature is at 850 DEG C～950 DEG C, and the first percentage pass reduction is not less than 60%, last Percentage pass reduction is not less than 30%；Bacillar structure ratio is not less than 80%, fibrous tissue width≤50 μm；
5) batching, its temperature controls at 750 DEG C～800 DEG C；
6) being incubated at bell furnace, temperature retention time is not less than 2 hours, and uses nitrogen to protect；
7) carry out warm-rolling, carry out cold rolling at temperature is 150 DEG C ~ 500 DEG C, and controlled rolling passage≤4 passage, and first Reduction in pass is not less than 60%；
8) carrying out high annealing, control annealing temperature is at 1050 DEG C ~ 1150 DEG C, and is incubated at this temperature, temperature retention time Being not less than 10 hours, protective atmosphere is H2+N2Gaseous mixture, its H2: N2=1:3。
Essential element of the present invention and the effect of technology controlling and process and mechanism
Utilize the present invention in existing CSP equipment Foundations, use continuous casting process, the uniqueness of rolling mill practice Design, improves column crystal ratio, reduces column crystal size；And hot rolling technology is controlled, it is thus achieved that thinner bacillar structure. Warm-rolling, it is ensured that head reduction in pass.
Molten steel composition design considerations is as follows:
C:C≤0.003%；Higher than 0.003%, finished product needs decarburizing annealing, forms internal oxidition, affects magnetic property.
Si:4.5% ~ 7.0%, Si is the essential element improving resistivity, is the most important alloying element reducing iron loss；But It is higher than 7.0%, and intensity is excessive, rolling difficulty；If less than 4.5%, magnetic property is poor.
Al:Al≤0.008%, the too high tiny AlN of easy precipitation, affect magnetic property.
Mn:0.25% ~ 1.0%, Mn acts primarily as solid S effect, and suitable Mn content can control the optimal precipitation of MnS the second phase With grow up, when its content is less than 0.25%, Gu the effect of S is weak, if higher than 1.0%, cost of alloy can be caused to increase, cold rolling be stranded Difficult.
The present invention use CSP produce high silicon steel process characteristic:
1) controlling the degree of superheat of molten steel, secondary cooling water Duan Qiangleng, wick-containing is depressed, to obtain column crystal≤1mm, and column crystal ratio The steel billet of >=90%.
2) accurately control tunnel temperature at 1100 DEG C ~ 1180 DEG C, with the precipitation of beneficially precipitated phase with grow up, and can obtain Good (100) texture.If temperature is higher than 1180 DEG C, in steel billet, the second phase is mingled with MnS and AlN solid solution and can not separate out and grow up. Second in cooling and the tiny precipitation of the operation of rolling therewith.If temperature is less than 1100 DEG C, increase the load of follow-up rolling.
3) rolling F1 reduction ratio is not less than 60%, and last percentage pass reduction is not less than 30%, forebay and the big pressure of afer bay Lower rate can be with attenuated fibers tissue.
4) accurately control finishing temperature, at 850 DEG C～950 DEG C, is because in this temperature range, it is possible to obtain good Tissue, and control offer condition for the temperature after batching.Why by oiler temperature control at 750 ~ 800 DEG C, it is to be Warm-rolling provides suitable temperature conditions.
5) hot rolled coil insulation, uses residual heat insulation, and temperature retention time is not less than 2 hours, makes temperature and even tissue, it is simple to after Continuous warm-rolling.
6) why warm-rolling, control its cold rolling temperature at 150 DEG C ~ 500 DEG C, rolling pass≤4 passage, the first passage pressure Lower amount >=60%, to obtain preferably rolling property, avoids DO3A large amount of precipitations with B2 brittlement phase.Heavy reduction can reduce rolling Passage, reduces thermal loss, it is ensured that temperature is at 150 DEG C ~ 500 DEG C.
The present invention compared with prior art, in existing CSP equipment Foundations, uses suitable teemer Skill, improves column crystal ratio, reduces column crystal size；Hot rolling technology is controlled, it is thus achieved that thinner bacillar structure, it is ensured that The rolling of warm-rolling.The present invention can production and processing type and the good high silicon steel of magnetic property.
Detailed description of the invention
Below the present invention is described in detail:
Table 1 is various embodiments of the present invention and comparative example chemical element value list；
Table 2 is the main technique value list of various embodiments of the present invention and comparative example；
Table 3 is the performance test results list of various embodiments of the present invention and comparative example.
Various embodiments of the present invention are prepared according to following technique:
1) smelt by mentioned component；
2) casting, during it, control superheat of liquid steel is at 10 DEG C ~ 30 DEG C, and the rate of cooling of secondary cooling water section is not Less than 100 DEG C/min, carrying out wick-containing pressure after the solidification amount of molten steel reaches 10 ~ 30%, reduction ratio controls 5 ~ 25%, and controls Column crystal size≤1mm in strand, column crystal ratio is not less than 90%；
3) carry out strand heating, control heating-up temperature at 1100 DEG C ~ 1180 DEG C；
4) rolling, control finishing temperature is at 850 DEG C～950 DEG C, and the first percentage pass reduction is not less than 60%, last Percentage pass reduction is not less than 30%；Bacillar structure ratio is not less than 80%, fibrous tissue width≤50 μm；
5) batching, its temperature controls at 750 DEG C～800 DEG C；
6) being incubated at bell furnace, temperature retention time is not less than 2 hours, and uses nitrogen to protect；
7) carry out warm-rolling, carry out cold rolling at temperature is 150 DEG C ~ 500 DEG C, and controlled rolling passage≤4 passage, and first Reduction in pass is not less than 60%；
8) carrying out high annealing, control annealing temperature is at 1050 DEG C ~ 1150 DEG C, and is incubated at this temperature, temperature retention time Being not less than 10 hours, protective atmosphere is H2+N2Gaseous mixture, its H2: N2=1:3。
Constituent content value list (wt%) of table 1 various embodiments of the present invention and comparative example
Embodiment C Si Mn Al S N [0](PPm)
1 0.0025 5.20 0.50 0.0030 0.0045 0.0015 18
2 0.0010 4.80 0.98 0.0048 0.0049 0.0018 15
3 0.0018 6.30 0.30 0.0016 0.002 0.0012 12
4 0.0026 6.50 0.28 0.0028 0.0035 0.001 10
5 0.0030 6.60 0.35 0.0065 0.0038 0.0026 8
6 0.0015 6.99 0.46 0.0075 0.0032 0.0016 13
7 0.0022 6.20 0.43 0.0019 0.0019 0.0028 17
1 0.0031 6.50 0.30 0.25 0.0051 0.0035 25
2 0.0018 6.30 0.35 0.30 0.0035 0.0018 13
3 0.0032 6.85 0.40 0.40 0.0062 0.0025 10
4 0.0010 4.75 0.50 0.15 0.0028 0.0026 18
The technological parameter value list of table 2 various embodiments of the present invention and comparative example
Table 3 is the performance test results list of various embodiments of the present invention and comparative example
Remarks: finished product thickness is 0.30mm.
From table 3 it can be seen that the high silicon steel warm-rolling using the present invention to produce is good, can be rolled into product thickness 0.30mm high Silicon steel.The power frequency of finished product and high frequency magnetic can be good, P1.0/400≤14W/kg, P1.0/1000≤61.50 W/kg.
This detailed description of the invention is only and most preferably enumerates, the not restricted enforcement to technical solution of the present invention.

Claims (1)

1. the method preparing the high silicon steel that a kind of CSP produces, its step:
1) by component and weight percent content it is: C≤0.003%, Si: 4.5% ~ 7.0%, Mn:0.25% ~ 1.0%, Al≤ 0.008%, S≤0.0050%, N≤0.0030%, [O]≤20PPm, remaining is smelted for Fe and inevitable impurity；Post Shape crystalline substance size≤1mm, column crystal ratio is not less than 90%, for bacillar structure；
2) casting, during it, control superheat of liquid steel is at 10 DEG C ~ 30 DEG C, and the rate of cooling of secondary cooling water section is not less than 100 DEG C/min, carrying out wick-containing pressure after the solidification amount of molten steel reaches 10 ~ 30%, reduction ratio controls 5 ~ 25%, and controls strand Middle column crystal size≤1mm, column crystal ratio is not less than 90%；
3) carry out strand heating, control heating-up temperature at 1100 DEG C ~ 1180 DEG C；
4) rolling, control finishing temperature is at 850 DEG C～950 DEG C, and the first percentage pass reduction is not less than 60%, last passage Reduction ratio is not less than 30%；Bacillar structure ratio is not less than 80%, fibrous tissue width≤50 μm；
5) batching, its temperature controls at 750 DEG C～800 DEG C；
6) being incubated at bell furnace, temperature retention time is not less than 2 hours, and uses nitrogen to protect；
7) carry out warm-rolling, carry out cold rolling at temperature is 150 DEG C ~ 500 DEG C, and controlled rolling passage≤4 passage, and the first passage Drafts is not less than 60%；
8) carrying out high annealing, control annealing temperature is at 1050 DEG C ~ 1150 DEG C, and is incubated at this temperature, and temperature retention time is the lowest In 10 hours, protective atmosphere was H2+N2Gaseous mixture, its H2: N2=1:3。
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Publication number Priority date Publication date Assignee Title
CN105063473B (en) * 2015-09-07 2017-01-11 东北大学 Method for manufacturing non-oriented high-silicon steel cold-rolled sheet based on strip cast rolling and DID (deformation induced disordering)
CN105112617B (en) * 2015-09-25 2018-06-12 包头市威丰稀土电磁材料股份有限公司 Cold-rolled orientation silicon steel high-temperature annealing process
CN108277434B (en) * 2018-03-19 2020-08-04 武汉钢铁有限公司 Precipitation strengthening ferritic steel with yield strength of 900MPa and production method thereof
CN115383408A (en) * 2022-09-09 2022-11-25 甘肃酒钢集团宏兴钢铁股份有限公司 Rolling process of high-manganese non-magnetic steel

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CN102126110A (en) * 2011-01-18 2011-07-20 东北大学 Method for manufacturing high-silicon steel thin strip
CN102151695A (en) * 2011-01-18 2011-08-17 东北大学 Manufacturing method of Cold-rolled non-oriented high-silicon steel thin strip
CN102816972A (en) * 2012-09-07 2012-12-12 武汉钢铁(集团)公司 Clad high silicon steel hot rolled plate and method for preparing same
CN103074476A (en) * 2012-12-07 2013-05-01 武汉钢铁(集团)公司 Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing
CN104120234A (en) * 2014-07-02 2014-10-29 东北大学 Preparation method of high-magnetic-induction non-oriented high-silicon steel thin plate

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CN101935800A (en) * 2010-09-30 2011-01-05 东北大学 High-silicon-steel thin belt and preparation method thereof
CN102002567A (en) * 2010-12-15 2011-04-06 北京科技大学 Production method of oriented high-silicon-steel thin plates
CN102126110A (en) * 2011-01-18 2011-07-20 东北大学 Method for manufacturing high-silicon steel thin strip
CN102151695A (en) * 2011-01-18 2011-08-17 东北大学 Manufacturing method of Cold-rolled non-oriented high-silicon steel thin strip
CN102816972A (en) * 2012-09-07 2012-12-12 武汉钢铁(集团)公司 Clad high silicon steel hot rolled plate and method for preparing same
CN103074476A (en) * 2012-12-07 2013-05-01 武汉钢铁(集团)公司 Method for producing high-magnetic-induction oriented silicon strips through three-stage normalizing
CN104120234A (en) * 2014-07-02 2014-10-29 东北大学 Preparation method of high-magnetic-induction non-oriented high-silicon steel thin plate

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