CN104878288A - Method for controlling silicon steel corrugated defects - Google Patents
Method for controlling silicon steel corrugated defects Download PDFInfo
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- CN104878288A CN104878288A CN201510267121.7A CN201510267121A CN104878288A CN 104878288 A CN104878288 A CN 104878288A CN 201510267121 A CN201510267121 A CN 201510267121A CN 104878288 A CN104878288 A CN 104878288A
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Abstract
The invention relates to the technical field of silicon steel production, and particularly relates to a method for controlling silicon steel corrugated defects. According to the method, thermal conductivity of steel is improved by adding alloying elements, meanwhile, an austenite recrystallization zone of steel is expanded and the structure of the steel is refined in a hot rolling process to reduce influences of a banded structure on surface quality, and meanwhile, that addition of alloying elements cannot influence an electromagnetic property of silicon steel is required. In a production process, through control over contents of Mn and other alloying elements and in combination with control over a hot rolling process, the problems of corrugated defects of grade non-oriented silicon steel in production of sheet billets are solved.
Description
Technical field
Silicon steel production technical field of the present invention is a kind of method controlling silicon steel corrugation defect specifically.
Background technology
In sheet billet production line production, during grade non-oriented silicon steel, surface there will be more serious corrugation defect problem, uncontrollable and the elimination by methods such as steel-making superheating temperature controls, there will be lamination coefficient in user's use procedure to reduce and motor performance such as not to conform at the problem, cause user normally to use.Because middle grade non-oriented silicon steel silicone content is high, when sheet billet production line is produced, in continuous casting billet structure, column crystal is too flourishing, cannot be completely broken when hot rolling is produced, formed along the banded structure of rolling direction, have the surface corrugations defect of serious feel after cold rolling.From metallographic structure analysis, be columanar structure close to 100% in the macrostructure of strand, hot-rolled sheet and cold-reduced sheet are thick banded structure, mainly the slab cooling speed of thinslab casting is fast, strand poor thermal conductivity during silicone content height, the columanar structure that formation group is large under thermograde effect.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method controlling silicon steel corrugation defect, by the control of alloying element, reduce strand columanar structure per-cent, improve the structural state of column crystal, and by the rolling of hot rolling technology, make strand columanar structure obtain fragmentation, obtain the hot-rolled sheet tissue of refinement, due to tissue heredity, the product corrugation defect after cold rolling is controlled.
The present invention realizes like this, a kind of method controlling silicon steel corrugation defect, adopt the technique of following order: hot metal pretreatment, converter smelting, external refining, sheet blank continuous casting, roller hearth type heating furnace, controlled rolling and controlled cooling, batch, pickling, single chassis rolling, continuous annealing and coating, according to mass percentage content, the chemical composition of prepared silicon steel is: Si:1.20% ~ 1.75%, Mn:0.90% ~ 1.10%, P≤0.035%, S :≤0.0060%, Als:0.20% ~ 0.30%, surplus is Fe and some inevitable impurity.
Preferred scheme further, according to mass percentage content, the chemical composition of prepared silicon steel is: Si:1.71% ~ 1.75%, Mn:1.10%, P≤0.025%, S :≤0.0060%, Als:0.20% ~ 0.30%, surplus is Fe and some inevitable impurity.
In preparation process further, hot rolling roughing two reduction in pass scope: 35 ~ 40mm in controlled rolling and controlled cooling step, hot rolling roughing first percentage pass reduction is: 30% ~ 35%, ensures the abundant refinement of original austenite grains.
Further, in controlled rolling and controlled cooling step, finish rolling finishing temperature is at 850 DEG C ± 15 DEG C, forms more forming core point, accumulate more strain energy in hot rolling microstructure, makes phase-change organization obtain abundant refinement.
The present invention compared with prior art, beneficial effect is: the present invention is by adding alloying element, improve the thermal conductivity of steel, expand the austenite recrystallization district of steel simultaneously, in course of hot rolling, refinement is carried out to the tissue of steel, reduce the impact of banded structure Surface Quality, require that the interpolation of alloying element can not affect the electromagnetic performance of silicon steel itself simultaneously.In process of production, controlled by the content of the alloying elements such as Mn, in conjunction with the control of hot rolling technology, solve the corrugation defect problem of grade non-oriented silicon steel in thin slab production.Used by the test of the companies such as siemens, Bai Xue group, pile pieces coefficient and motor performance all reach service requirements.The present invention, under the prerequisite not reducing silicon steel electromagnetic performance, solves the corrugation defect problem in thin slab in grade silicon steel production process, improves the competitiveness of product in market and added value.
By the interpolation of the alloying elements such as Mn, the grain-size of refinement continuously cast bloom, reduce columanar structure's per-cent in strand, improve the structural state of column crystal, the interpolation of alloying element simultaneously can expand austenite recrystallization district, in the hot rolling by improving the draught of roughing passage, making full use of the controlled rolling of austenite recrystallization district and carrying out crystal grain thinning, obtain the austenite structure of refinement more, make the columanar structure of strand obtain abundant fragmentation.In conjunction with low finishing temperature control, in hot rolling microstructure, form more forming core point, accumulate more strain energy, make phase-change organization obtain further refinement.
The present invention is by the control of alloying element, reduce strand columanar structure per-cent, improve the structural state of column crystal, and by the rolling of hot rolling technology, strand columanar structure is made to obtain fragmentation, obtain the hot-rolled sheet tissue of refinement, due to tissue heredity, the product corrugation defect after cold rolling is controlled.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
A kind of method controlling silicon steel corrugation defect, adopt the technique of following order: hot metal pretreatment, converter smelting, external refining, sheet blank continuous casting, roller hearth type heating furnace, controlled rolling and controlled cooling, batch, pickling, single chassis rolling, continuous annealing and coating, according to mass percentage content, the chemical composition of prepared silicon steel is: Si:1.71%, Mn:1.10%, P:0.025%, S:0.0030%, Als:0.30%, surplus is Fe and some inevitable impurity.
In preparation process, other step all adopts conventional technique still to exist, hot rolling roughing two reduction in pass scope demand fulfillment: 35mm in controlled rolling and controlled cooling step, hot rolling roughing first percentage pass reduction is: 30%, for ensureing the abundant refinement of original austenite grains.
In controlled rolling and controlled cooling step, finish rolling finishing temperature is at 850 DEG C, forms more forming core point, accumulate more strain energy in hot rolling microstructure, makes phase-change organization obtain abundant refinement.
Embodiment 2
A kind of method controlling silicon steel corrugation defect, adopt the technique of following order: hot metal pretreatment, converter smelting, external refining, sheet blank continuous casting, roller hearth type heating furnace, controlled rolling and controlled cooling, batch, pickling, single chassis rolling, continuous annealing and coating, according to mass percentage content, the chemical composition of prepared silicon steel is: Si:1.75%, Mn:1.10%, P≤0.035%, S :≤0.0060%, Als:0.20%, surplus is Fe and some inevitable impurity.
In preparation process, hot rolling roughing two reduction in pass scope: 40mm in controlled rolling and controlled cooling step, hot rolling roughing first percentage pass reduction is: 35%, ensures the abundant refinement of original austenite grains.
In controlled rolling and controlled cooling step, finish rolling finishing temperature is at 865 DEG C, forms more forming core point, accumulate more strain energy in hot rolling microstructure, makes phase-change organization obtain abundant refinement.
In the above embodiments, by the interpolation of alloying element ratio, the grain-size of refinement continuously cast bloom, reduce columanar structure's per-cent in strand, improve the structural state of column crystal, the interpolation of alloying element simultaneously can expand austenite recrystallization district, in the hot rolling by improving the draught of roughing passage, make full use of the controlled rolling of austenite recrystallization district and carry out crystal grain thinning, obtain the austenite structure of refinement more, make the columanar structure of strand obtain abundant fragmentation.In conjunction with low finishing temperature control, in hot rolling microstructure, form more forming core point, accumulate more strain energy, make phase-change organization obtain further refinement.After testing, the surface of steel plate is without corrugation defect.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. one kind controls the method for silicon steel corrugation defect, it is characterized in that, adopt the technique of following order: hot metal pretreatment, converter smelting, external refining, sheet blank continuous casting, roller hearth type heating furnace, controlled rolling and controlled cooling, batch, pickling, single chassis rolling, continuous annealing and coating, according to mass percentage content, the chemical composition of prepared silicon steel is: Si:1.20% ~ 1.75%, Mn:0.90% ~ 1.10%, P≤0.035%, S :≤0.0060%, Als:0.20% ~ 0.30%, surplus is Fe and some inevitable impurity.
2. according to the method for control silicon steel corrugation defect according to claim 1, it is characterized in that, according to mass percentage content, the chemical composition of prepared silicon steel is: Si:1.71% ~ 1.75%, Mn:1.10%, P≤0.025%, S :≤0.0060%, Als:0.20% ~ 0.30%, surplus is Fe and some inevitable impurity.
3. according to the method for control silicon steel corrugation defect according to claim 1, it is characterized in that, hot rolling roughing two reduction in pass scope: 35 ~ 40mm in controlled rolling and controlled cooling step, hot rolling roughing first percentage pass reduction is: 30% ~ 35%, ensures the abundant refinement of original austenite grains.
4. according to the method for control silicon steel corrugation defect according to claim 1, it is characterized in that, in controlled rolling and controlled cooling step, finish rolling finishing temperature is at 850 DEG C ± 15 DEG C, forms more forming core point in hot rolling microstructure, accumulate more strain energy, make phase-change organization obtain abundant refinement.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719078A (en) * | 2019-03-19 | 2020-09-29 | 江苏集萃冶金技术研究院有限公司 | Production method of non-oriented silicon steel for eliminating corrugated defects |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS532332A (en) * | 1976-06-29 | 1978-01-11 | Nippon Steel Corp | Production of nondirectional electrical steel sheet having excellent surface property |
| CN1548569A (en) * | 2003-05-12 | 2004-11-24 | 宝山钢铁股份有限公司 | Indirectional electric steel plate without corrugated fault and its making process |
| CN101139681A (en) * | 2007-10-26 | 2008-03-12 | 山西太钢不锈钢股份有限公司 | High grade cold rolling non-oriented silicon steel and method for manufacturing same |
| CN103266266A (en) * | 2013-05-27 | 2013-08-28 | 钢铁研究总院 | Low-grade non-oriented silicon steel produced in continuous casting and rolling processes of sheet billet and preparation method thereof |
| CN103388106A (en) * | 2013-06-27 | 2013-11-13 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with high magnetic induction and low iron loss, and manufacturing method thereof |
-
2015
- 2015-05-22 CN CN201510267121.7A patent/CN104878288A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS532332A (en) * | 1976-06-29 | 1978-01-11 | Nippon Steel Corp | Production of nondirectional electrical steel sheet having excellent surface property |
| CN1548569A (en) * | 2003-05-12 | 2004-11-24 | 宝山钢铁股份有限公司 | Indirectional electric steel plate without corrugated fault and its making process |
| CN101139681A (en) * | 2007-10-26 | 2008-03-12 | 山西太钢不锈钢股份有限公司 | High grade cold rolling non-oriented silicon steel and method for manufacturing same |
| CN103266266A (en) * | 2013-05-27 | 2013-08-28 | 钢铁研究总院 | Low-grade non-oriented silicon steel produced in continuous casting and rolling processes of sheet billet and preparation method thereof |
| CN103388106A (en) * | 2013-06-27 | 2013-11-13 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with high magnetic induction and low iron loss, and manufacturing method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 张金柱 等: "《薄板坯连铸装备及生产技术》", 31 August 2007, 冶金工业出版社 * |
| 高振宇 等: "无取向硅钢中高牌号产品瓦楞缺陷的控制技术", 《2011年鞍山市自然科学学术成果优秀论文集》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719078A (en) * | 2019-03-19 | 2020-09-29 | 江苏集萃冶金技术研究院有限公司 | Production method of non-oriented silicon steel for eliminating corrugated defects |
| CN111719078B (en) * | 2019-03-19 | 2021-06-15 | 江苏集萃冶金技术研究院有限公司 | Production method of non-oriented silicon steel for eliminating corrugated defects |
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Application publication date: 20150902 |