CN104438328B - A kind of hot-rolling method improving non-orientation silicon steel magnetic property - Google Patents
A kind of hot-rolling method improving non-orientation silicon steel magnetic property Download PDFInfo
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- CN104438328B CN104438328B CN201410694842.1A CN201410694842A CN104438328B CN 104438328 B CN104438328 B CN 104438328B CN 201410694842 A CN201410694842 A CN 201410694842A CN 104438328 B CN104438328 B CN 104438328B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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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
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Manufacturing Of Steel Electrode Plates (AREA)
Abstract
A kind of hot-rolling method that can improve non-orientation silicon steel magnetic property: smelt, be casting continuously to form base；Strand is divided two sections of heating, wherein: entering heating furnace from strand and account for the 80 ~ 90% of conventional heating total time to the heating-up time being warming up to 950 ~ 1050 DEG C, being further continued for the time used by 1100 ~ 1150 DEG C that is warming up to is the 10 ~ 20% of conventional heating total time；Hot rolling；Routine carries out rear operation.The present invention utilizes existing equipment, at the heating-up temperature of strand being less than 1280 DEG C by control, can make again the B5000 >=1.7T of steel plate, P1.5/50≤2.3W/kg.
Description
Technical field
The present invention relates to a kind of method that non-orientation silicon steel produces, specifically belong to a kind of raising non-orientation silicon steel magnetic property
Hot-rolling method.
Background technology
Cold rolling non-oriented electrical steel is a kind of magnetically soft alloy material, mainly for the manufacture of motor and the iron core of electrical equipment, and iron
Damage and magnetic strength is the leading indicator weighing its performance.Affect non-orientation silicon steel iron loss because of have composition, crystal texture, impurity,
Field trash, internal stress, crystallite dimension, steel plate thickness etc..In the case of composition, finished product thickness are certain, the state of precipitated phase and
The control of texture just seems particular importance.At present, in traditional mode of production, the heating of strand uses walking beam furnace more,
It is four-part form heating, i.e. divides preheating section, the first bringing-up section, the second bringing-up section and soaking zone, soaking temperature control 1000～
1200 DEG C, each section of time basic difference is little, and all 50～80min, total time inside furnace compares and is about 270～340min；Essence
Roll finishing temperature ＞ 920 DEG C.Through analyzing, this heating technique makes the sulfide in steel plate and nitride be prone to solid solution, in hot rolling
During due to solid solubility along with steel billet temperature reduce and decline, the most again with small and dispersed shape separate out, move back at rear operation finished product
It is unfavorable for crystal grain long ambassador finished product crystal grains fine during fire, (111) texture component can be caused simultaneously to increase, finally make finished product
Magnetic degenerates.
Through retrieval, Chinese Patent Application No. is the document of 200310108197.2, discloses a kind of production orientation-free cold-rolled
The production method of electrical sheet.Though it makes heating of plate blank to 900～1150 DEG C, finishing temperature is 800～950 DEG C of (its finishing temperatures
Experimental example is all more than 800 DEG C), but it is applicable to the production line that similar casting limit, sheet billet limit is rolled, limit cast panel base thinner thickness,
It is 120～170mm, is not suitable for tradition steel-making at present, hot rolling line.
Chinese Patent Application No. is the document of 200810222024.6, it discloses and a kind of produces the cold of low-iron loss high-magnetic strength
Roll the manufacture method of non-oriented electrical steel, it is characterized in that composition does not contains Al or the low carbon low silicon electrician containing 0.005～0.60%Al
Steel, slab heating temperature is 900～1150 DEG C, and finishing temperature is 900～975 DEG C.Although document strand uses low-temperature heat
Technology, but its chemical composition being suitable for is Si:1.0～2.0%, 0～0.60%Al, and 1.5%≤Si+3Al≤3.2%, Mn:0.01
～0.40%, P :≤0.04%, S :≤0.01%, N :≤0.005%, O :≤0.025%, remaining is Fe and the most miscellaneous
Matter.It is not suitable for Si and the Al content higher No yield point trade mark.
The applicant is less than 1200 DEG C for realizing slab heating temperature, applies also for tradition steel-making, hot rolling production
Line produces the high grade non-oriented silicon steel that Si and Al content is higher, realizes low-temperature heat simultaneously and improves the magnetic of steel plate further
The method for producing non-oriented silicon steel of energy, finds through great many of experiments, by controlling heating technique and the control of slab at hot-rolled process
Finish rolling open rolling processed and finishing temperature, so that it may so that the problems referred to above are effectively solved, make magnetic be further enhanced, thus
Meet the needs of electromechanical industries development.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, it is provided that one utilizes existing equipment, by controlling the heating of strand
At temperature is less than 1200 DEG C, the B5000 >=1.7T of steel plate can be improved again, the raising non-orientation silicon steel of P1.5/50≤2.3W/kg
The hot-rolling method of magnetic property.
Realize the measure of above-mentioned purpose:
A kind of hot-rolling method improving non-orientation silicon steel magnetic property, its step:
1) smelt, be casting continuously to form base；
2) strand divides two sections to heat, wherein: enter heating furnace to the intensification being warming up to 950 ~ 1050 DEG C from strand
Time accounts for the 80 ~ 90% of conventional heating total time, and being further continued for the time used by 1100 ~ 1150 DEG C that is warming up to is conventional heating total time
10 ~ 20%；
3) carry out hot rolling: after conventional roughing, carry out finish rolling, and control finish rolling start rolling temperature at 880 ~ 950 DEG C, essence
Roll finishing temperature at 750 ~ 800 DEG C；
4) routine carries out rear operation.
It is characterized in that, its be suitable for composition and weight percent content be: C≤0.005%, Si:2.7～3.5%, Mn:
0.1～1.0%, Al:0.6～1.5%, S≤0.002%, N≤0.003%, other for Fe and is unavoidably mingled with, and thickness is 210
～the strand of 230mm.
Heating of plate blank is used two-part to heat by the present invention, i.e. steel plate is heated to 950～1050 DEG C by first paragraph, and these rank
The heat time of section accounts for the 80 ~ 90% of conventional heating total time；Second segment is heated to 1100～1150 DEG C, the time used by this stage
For conventional heating total time 10 ~ 20%.First paragraph humidity province is AlN, MnS Coarsening Temperature district, if heating-up temperature is less than 950
DEG C, and the time is short, is roughened weak effect.
Explanation to finish-rolling process, why the present invention uses Low Temperature Finish technique in the hot fine rolling stage, i.e. controls it
Start rolling temperature is less than 950 DEG C, and finish rolling finishing temperature is less than 800 DEG C, is owing in experiments it is found that, uses Low Temperature Finish to increase
And (110) texture is favourable (100)；Such as start rolling temperature more than 950 DEG C and finishing temperature more than 800 DEG C, to increase (100) and
(110) texture declines.
The present invention compared with prior art, utilizes existing equipment, by controlling the heating-up temperature to strand less than 1280
At DEG C, the B5000 >=1.7T of steel plate, P1.5/50≤2.3W/kg can be made again.
Detailed description of the invention
Below the present invention is described in detail:
Table 1 is the chemical component table of various embodiments of the present invention and comparative example；
Table 2 is various embodiments of the present invention and the main technologic parameters of comparative example and magnetic property list.
Various embodiments of the present invention produce according to following steps:
1) smelt, be casting continuously to form base；
2) strand divides two sections to heat, wherein: enter heating furnace to the intensification being warming up to 950 ~ 1050 DEG C from strand
Time accounts for the 80 ~ 90% of conventional heating total time, and being further continued for the time used by 1100 ~ 1150 DEG C that is warming up to is conventional heating total time
10 ~ 20%；
3) carry out hot rolling: after conventional roughing, carry out finish rolling, and control finish rolling start rolling temperature at 880 ~ 950 DEG C, essence
Roll finishing temperature at 750 ~ 800 DEG C；
4) routine carries out rear operation.
The component list (%wt) of table 1 various embodiments of the present invention and comparative example
Table 2 various embodiments of the present invention and the main technologic parameters of comparative example and magnetic property list
From Table 2, it can be seen that embodiment 1～7 uses the technique of the present invention, slab stops 80 950～1050 DEG C of sections
～the heat time of 90%, stopping 10～the heat time of 20% at 1100～1150 DEG C of temperature sections, it is right that product magnetic property is better than
Ratio, comparative example is also adopted by identical heating-up temperature, but two sections of heat time differences.Comparative example 3 is conventional four sections of heating techniques,
Each section of time equalization, and finishing temperature is too high, finished product magnetic property is poor relative to the inventive method.
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 hot-rolling method improving non-orientation silicon steel magnetic property, it is characterised in that:
It is applicable to composition and weight percent content is: C≤0.005%, Si:2.7～3.5%, Mn:0.1～1.0%, Al:0.5
～1.5%, S≤0.002%, N≤0.003%, other is Fe and being unavoidably mingled with, and the strand that thickness is 210～230mm；Its
Step:
1) smelt, be casting continuously to form base；
2) strand divides two sections to heat, wherein: enter heating furnace to the heating-up time being warming up to 950 ~ 1050 DEG C from strand
Account for the 80 ~ 90% of conventional heating total time, be further continued for that the time used by 1100 ~ 1150 DEG C that is warming up to is conventional heating total time 10 ~
20%；
3) carry out hot rolling: after conventional roughing, carry out finish rolling, and control finish rolling start rolling temperature at 880 ~ 950 DEG C, finish rolling finish to gauge
Temperature is at 750 ~ 800 DEG C；
4) routine carries out rear operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410694842.1A CN104438328B (en) | 2014-11-27 | 2014-11-27 | A kind of hot-rolling method improving non-orientation silicon steel magnetic property |
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| CN201410694842.1A CN104438328B (en) | 2014-11-27 | 2014-11-27 | A kind of hot-rolling method improving non-orientation silicon steel magnetic property |
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| CN104438328A CN104438328A (en) | 2015-03-25 |
| CN104438328B true CN104438328B (en) | 2016-08-24 |
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| CN106048208B (en) * | 2016-08-12 | 2017-12-12 | 武汉钢铁有限公司 | Fe Mn series austenite nonmagnetic steel forging methods |
| KR102120276B1 (en) * | 2018-09-27 | 2020-06-08 | 주식회사 포스코 | Non-oriented electrical steel sheet and method for manufacturing the same |
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| JPS5823411A (en) * | 1981-08-05 | 1983-02-12 | Nippon Steel Corp | Nondirectional electromagnetic steel plate having superior magnetism and manufacture therefor |
| US5062905A (en) * | 1989-08-18 | 1991-11-05 | Nippon Steel Corporation | Method of producing non-oriented magnetic steel plate having high magnetic flux density |
| JP4280004B2 (en) * | 2001-06-01 | 2009-06-17 | 新日本製鐵株式会社 | Semi-processed non-oriented electrical steel sheet with extremely excellent iron loss and magnetic flux density and method for producing the same |
| CN101358272B (en) * | 2008-09-05 | 2010-07-28 | 首钢总公司 | Method for preparing high grade non-oriented electrical steel adding rare earth cerium |
| CN101358317B (en) * | 2008-09-05 | 2010-09-22 | 首钢总公司 | Method for preparing high silicium calcareous non-oriented electrical steel |
| CN101748263B (en) * | 2008-12-12 | 2011-07-27 | 鞍钢股份有限公司 | Method for heating directional silicon steel slab |
| CN101906577B (en) * | 2010-07-16 | 2012-10-17 | 武汉钢铁(集团)公司 | Non-oriented electrical steel produced by sheet continuous casting and rolling and method thereof |
| CN102776346A (en) * | 2012-07-06 | 2012-11-14 | 河北钢铁股份有限公司邯郸分公司 | Hot rolling method for producing non-oriented electrical steel by continuously casting and rolling non-traditional sheet blank |
| CN102925793B (en) * | 2012-11-27 | 2014-12-10 | 武汉钢铁(集团)公司 | Non-oriented electrical steel with magnetic induction greater than or equal to 1.8 T and production method thereof |
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Effective date of registration: 20170711 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Patentee after: WUHAN IRON AND STEEL Co.,Ltd. Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: WUHAN IRON AND STEEL (GROUP) Corp. |
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Granted publication date: 20160824 Termination date: 20211127 |