CN103273043A - Method for preparing pure iron/columnar crystal high-silicon electrical steel composite plate blank - Google Patents
Method for preparing pure iron/columnar crystal high-silicon electrical steel composite plate blank Download PDFInfo
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- CN103273043A CN103273043A CN2013101987707A CN201310198770A CN103273043A CN 103273043 A CN103273043 A CN 103273043A CN 2013101987707 A CN2013101987707 A CN 2013101987707A CN 201310198770 A CN201310198770 A CN 201310198770A CN 103273043 A CN103273043 A CN 103273043A
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Abstract
The invention discloses a method for preparing a pure iron/columnar crystal high-silicon electrical steel composite plate blank and belongs to the field of preparation and processing technologies of metal material. An electromagnetic constraint directional solidification technology is adopted, plate-shaped columnar crystal texture high-silicon electrical steel serves as a substrate, and isometric crystal texture pure iron serves as composite layers on the two side faces, and the pure iron/columnar crystal high-silicon electrical steel composite plate blank is prepared. Good metallurgical bonding is achieved between the side faces of the columnar crystal high-silicon electrical steel and the pure iron. The prepared composite plate blank can improve the hydrostatic pressure of the side faces when the high-silicon electrical steel is rolled, and therefore, the problem of rolling edge cracking of the high-silicon electrical steel is effectively reduced or avoided. The method for preparing the pure iron/columnar crystal high-silicon electrical steel composite plate blank has important engineering significance.
Description
Technical field:
The present invention relates to a kind of technology of preparing of double metallic composite material, belong to metallic composite processing technology of preparing field, the preparation method of a kind of pure iron/column crystal high-silicon electrical steel composite plate blanks particularly is provided.
Background technology:
High-silicon electrical steel (Fe-6.5wt%Si alloy) is compared with common electrical sheet, have magnetostriction coefficient close to zero, excellent soft magnet performance such as iron loss is low.But the middle black brittleness of conventional cast texture high-silicon electrical steel is big, warm-rolling and when cold rolling the limit split very seriously, thereby be difficult to adopt conventional casting-roll process to prepare the band of thickness 0.1 ~ 0.3mm, had a strong impact on its extensive use at industrial circle.On the other hand, pure iron is cheap and plastic deformation ability is excellent.
Therefore, if high-silicon electrical steel and pure iron is compound, prepare double metallic composite material (pure iron is compounded in the side of high-silicon electrical steel slab), can be less or avoid the high-silicon electrical steel rolled edge to split, increase substantially the alloy lumber recovery.
Gu the preparation method of the bi-metal composite panel of existing open report or band is mainly solid-composite algorithm at present, as push composite algorithm [Xu Daxiang. bimetallic composite decorating board and manufacture method thereof. Chinese invention patent: CN102774069A, open day: 2012.11.14.], [Meng Liang such as roll-bonding method, Liu Jiabin, the field is beautiful. a kind of Cu/Ag ply-metal preparation method. and Chinese invention patent: CN1739913A, open day: 2006.03.01.], these methods all need the metal interface place that a large amount of plastic deformations take place, make surface metal-layer break, realize combination by plastic deformation and interatomic diffusion under pressure.The deformation performance of high-silicon electrical steel is poor, is difficult to realize that by large plastometric set bimetallic is compound.The research of the compound preparation double metallic composite material of relevant solid-liquid mainly concentrates on the bar, main method has centre spinning [square great achievement, Yao Man. the bimetal centrifugal casting control of process parameters. casting, 1997(6): 37-39.], continuous casting of two strands in parallel gradient composite algorithm [Zhang Weiwen, Zou Ganfeng, Deng Changning, Deng. prepare the experimental study of functionally gradient material (FGM) with continuous casing. Acta Metallurgica Sinica, 1998(34): 609-614.], two crystallizer continuous metal cast process [Xie Jianxin, Wu Chunjing, the Li Jing beautiful woman. multilayer materials one-step casting former and technology. Chinese invention patent: ZL98101042.3,2000.10.21.], [week becomes core-filled and continuously casted method for Xie Jianxin, Wu Chunjing, Deng. a kind of clad material one-step casting progressive forming equipment and technology. Chinese invention patent: ZL01109076.6,2003.9.3.] etc.Said method is widely used in preparing composite steel billet, Al-Si series alloy, copper-Zn-Al alloy composite, copper cover aluminum composite etc. respectively.But above-mentioned preparation method also comes with some shortcomings: (1) technology is complicated, and control requires high; (2) the bar-shaped composites of preparation that are fit to more; (3) prepared sample tissue is the conventional cast tissue, the difficult accurate control that realizes tissue.
The present application people's early-stage Study is found, cylindrical crystalline texture high-silicon electrical steel by the directional solidification preparation is compared with common equiaxed grain structure high-silicon electrical steel, the plastic deformation performance has obtained remarkable lifting [Xie J X, Fu H D, Zhang Z H, et al. Deformation twinning feature and its effects on significant enhancement of tensile ductility in columnar-grained Fe – 6.5wt.%Si alloy at intermediate temperatures. Intermetallics, 2012,23:20-26.].The technology of employing directional solidification+heat treatment+pack rolling has realized the preparation of high-silicon electrical steel strip, wherein pack rolling (clad material is stainless steel or pure iron etc.) can improve the deformed area hydrostatic pressure, reduce the inhomogeneous reduction of blank temperature in the operation of rolling, thereby alleviate or avoid rolled edge to split problem, improve the lumber recovery of high silicon steel band by a relatively large margin.[Xie Jianxin pays Hua Dong, Zhang Zhi person of outstanding talent, etc. a kind of short flow high efficiency preparing process of high-silicon electrical steel strip. Chinese invention patent, application number: 201010195520.4, the applying date: 2010.5.31.].Use sheath material and remove problems such as sheath material labor intensive material resources, complex process, cost height but this method also exists.
Patent of the present invention is based on above-mentioned patented technology, exploitation directly prepares the technology of the pure iron/column crystal high-silicon electrical steel composite plate blanks of the compound pure iron in high-silicon electrical steel sheet material both sides with columanar structure, by improving the plastic deformation performance of blank integral body, reach the purpose that improves high-silicon electrical steel strip preparation efficiency.
Summary of the invention:
The object of the present invention is to provide the high efficiency preparation method of a kind of pure iron/column crystal high-silicon electrical steel composite plate blanks, can realize realizing the effectively compound of pure iron and high silicon steel when the high-silicon electrical steel solidified structure is accurately controlled, give full play to the advantage of the remarkable lifting of column crystal high-silicon electrical steel plasticity and pure iron deformation performance excellence, for the preparation of high-silicon electrical steel band provides the high-performance blank.
The preparation method of a kind of pure iron/cylindrical crystalline texture high-silicon electrical steel composite plate blanks, it is characterized in that with tabular cylindrical crystalline texture high-silicon electrical steel be matrix, be the two sides composite bed with the equiaxed grain structure pure iron, and column crystal high-silicon electrical steel side form excellent metallurgical and is combined between pure iron; Concrete preparation technology is as follows:
(1) alloy blank is prepared: adopt vacuum induction to found the high-silicon electrical steel ingot casting, composition is Fe-(5.0 ~ 7.0) wt%Si, in 700 ~ 1100 ℃ of scopes ingot casting is forged into tabular blank as matrix; As the two sides composite bed, the thickness of one-sided composite bed is 0.5% ~ 10% of composite plate blanks overall width with industrial pure iron sheet; Tabular high-silicon electrical steel matrix and sheet pure iron composite bed surface clean is clean, oven dry;
(2) composite blank directional solidification: adopt the electromagnetic confinement directional solidification technique to prepare composite blank, concrete steps comprise:
A. adopt high purity quartz plate and sheet pure iron to be combined into composite mould, adopt the fire clay bonding between quartz plate and the pure iron sheet, dry after the alcohol wash;
B. the high-silicon electrical steel slab is put into composite mould; adopt high-frequency inductor that the high-silicon electrical steel slab is melted; strict control heating-up temperature is at 1460 ~ 1520 ℃; the type of cooling adopts and shifts out the casting mold water-cooled; casting mold shifts out speed control at 0.5 ~ 100mm/min; the fusing of assurance matrix; the pure iron composite bed does not melt; whole process is followed inert gas shielding; and then to make matrix be cylindrical crystalline texture high-silicon electrical steel; composite bed is the double metallic composite material slab of equiaxed grain structure pure iron, and high-silicon electrical steel and pure iron interface reach the metallurgical binding state.
Advantage of the present invention:
(1) adopts the electromagnetic confinement directional solidification technique, shift out speed and accurately control by temperature, casting mold, guarantee high-silicon electrical steel matrix fusing back directional solidification and composite bed does not melt, when obtaining to have the cylindrical crystalline texture high-silicon electrical steel of good deformation performance, keep the integrality of both sides pure iron composite bed;
(2) be metallurgical binding between high-silicon electrical steel and the pure iron, can improve high-silicon electrical steel sidepiece hydrostatic pressure when rolling, thereby effectively alleviate or avoid the rolled edge of high-silicon electrical steel to split problem.
Description of drawings:
Fig. 1 is pure iron/column crystal high-silicon electrical steel composite blank preparation technology schematic diagram
The specific embodiment
Embodiment 1:
(1) alloy blank is prepared: adopt vacuum induction to found high-silicon electrical steel (Fe-6.5wt%Si) ingot casting, ingot casting forged into tabular blank in 850 ~ 1050 ℃ of scopes as matrix (size: 55mm * 6mm * 100mm); With the pure iron sheet of commodity production as side composite bed (size: 7mm * 2mm * 100mm).Tabular high-silicon electrical steel matrix and sheet pure iron composite bed surface clean is clean, oven dry.
(2) composite blank directional solidification: adopt the electromagnetic confinement directional solidification technique, composite blank is carried out the directional solidification preparation, concrete steps comprise: A. adopts the high purity quartz plate, and ((size: 7mm * 2mm * 100mm) is combined into composite mould for size: 64mm * 1.5mm * 100mm) and sheet pure iron, adopt the fire clay bonding between quartz plate and the pure iron sheet, dry after the alcohol wash; B. the high-silicon electrical steel slab is put into composite mould; adopt high-frequency inductor that the high-silicon electrical steel matrix is melted; strict control heating-up temperature is at 1480 ℃; the type of cooling adopts and shifts out the casting mold water-cooled; casting mold shifts out speed control at 1mm/min; the fusing of assurance matrix; the pure iron composite bed does not melt; whole process is followed inert gas shielding; and then to make matrix be cylindrical crystalline texture high-silicon electrical steel; composite bed is the double metallic composite material slab of equiaxed grain structure pure iron, and high-silicon electrical steel and pure iron interface reach metallurgical binding.
Embodiment 2:
(1) alloy blank is prepared: adopt vacuum induction to found high-silicon electrical steel (Fe-6wt%Si) ingot casting, ingot casting forged into tabular blank in 700 ~ 1000 ℃ of scopes as matrix (size: 60mm * 7mm * 200mm); With the pure iron sheet of commodity production as side composite bed (size: 8mm * 3mm * 200mm).Tabular high-silicon electrical steel matrix and sheet pure iron composite bed surface clean is clean, oven dry.
(2) composite blank directional solidification: adopt the electromagnetic confinement directional solidification technique that composite blank is carried out the directional solidification preparation, concrete steps comprise: A. adopts the high purity quartz plate, and ((size: 8mm * 3mm * 200mm) is combined into composite mould for size: 68mm * 1.5mm * 200mm) and sheet pure iron, adopt the fire clay bonding between quartz plate and the pure iron sheet, dry after the alcohol wash; B. the high-silicon electrical steel slab is put into composite mould; adopt high-frequency inductor that the high-silicon electrical steel matrix is melted; strict control heating-up temperature is at 1500 ℃; the type of cooling adopts and shifts out the casting mold water-cooled; casting mold shifts out speed control at 1.5mm/min; the fusing of assurance matrix; the pure iron composite bed does not melt; whole process is followed inert gas shielding; and then to make matrix be cylindrical crystalline texture high-silicon electrical steel; composite bed is the double metallic composite material slab of equiaxed grain structure pure iron, and high-silicon electrical steel and pure iron metallurgical interface reach combination.
Claims (1)
1. the preparation method of pure iron/cylindrical crystalline texture high-silicon electrical steel composite plate blanks, it is characterized in that with tabular cylindrical crystalline texture high-silicon electrical steel be matrix, be the two sides composite bed with the equiaxed grain structure pure iron, and column crystal high-silicon electrical steel side form excellent metallurgical and is combined between pure iron; Concrete preparation technology is as follows:
(1) alloy blank is prepared: adopt vacuum induction to found the high-silicon electrical steel ingot casting, composition is Fe-(5.0 ~ 7.0) wt%Si, in 700 ~ 1100 ℃ of scopes ingot casting is forged into tabular blank as matrix; As the two sides composite bed, the thickness of one-sided composite bed is 0.5% ~ 10% of composite plate blanks overall width with industrial pure iron sheet; Tabular high-silicon electrical steel matrix and sheet pure iron composite bed surface clean is clean, oven dry;
(2) composite blank directional solidification: adopt the electromagnetic confinement directional solidification technique to prepare composite blank, concrete steps comprise:
A. adopt high purity quartz plate and sheet pure iron to be combined into composite mould, adopt the fire clay bonding between quartz plate and the pure iron sheet, dry after the alcohol wash;
B. the high-silicon electrical steel slab is put into composite mould; adopt high-frequency inductor that the high-silicon electrical steel slab is melted; strict control heating-up temperature is at 1460 ~ 1520 ℃; the type of cooling adopts and shifts out the casting mold water-cooled; casting mold shifts out speed control at 0.5 ~ 100mm/min; the fusing of assurance matrix; the pure iron composite bed does not melt; whole process is followed inert gas shielding; and then to make matrix be cylindrical crystalline texture high-silicon electrical steel; composite bed is the double metallic composite material slab of equiaxed grain structure pure iron, and high-silicon electrical steel and pure iron interface reach the metallurgical binding state.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086592A (en) * | 2016-07-21 | 2016-11-09 | 昆明理工大学 | A kind of preparation method of the wear-resisting iron and steel of carbide oriented growth |
Citations (5)
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|---|---|---|---|---|
| JP2001026822A (en) * | 1999-05-10 | 2001-01-30 | Daido Steel Co Ltd | Silicon steel sheet and its manufacture |
| CN1528921A (en) * | 2003-09-25 | 2004-09-15 | 武汉理工大学 | High-silica silicon-steel sheet heat treatment and multiple cold-rolling method |
| CN101049669A (en) * | 2007-05-14 | 2007-10-10 | 北京科技大学 | Preparation method for cold rolling sheet of duriron |
| CN101352725A (en) * | 2008-09-02 | 2009-01-28 | 北京科技大学 | High-silicon steel directional solidification and bar plate cold rolling method for directly producing light sheet |
| CN101886215A (en) * | 2010-05-31 | 2010-11-17 | 北京科技大学 | Short-flow high-efficiency preparation method of thin high-silicon electrical steel strip |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001026822A (en) * | 1999-05-10 | 2001-01-30 | Daido Steel Co Ltd | Silicon steel sheet and its manufacture |
| CN1528921A (en) * | 2003-09-25 | 2004-09-15 | 武汉理工大学 | High-silica silicon-steel sheet heat treatment and multiple cold-rolling method |
| CN101049669A (en) * | 2007-05-14 | 2007-10-10 | 北京科技大学 | Preparation method for cold rolling sheet of duriron |
| CN101352725A (en) * | 2008-09-02 | 2009-01-28 | 北京科技大学 | High-silicon steel directional solidification and bar plate cold rolling method for directly producing light sheet |
| CN101886215A (en) * | 2010-05-31 | 2010-11-17 | 北京科技大学 | Short-flow high-efficiency preparation method of thin high-silicon electrical steel strip |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086592A (en) * | 2016-07-21 | 2016-11-09 | 昆明理工大学 | A kind of preparation method of the wear-resisting iron and steel of carbide oriented growth |
| CN106086592B (en) * | 2016-07-21 | 2017-12-22 | 昆明理工大学 | A kind of preparation method of the wear-resisting steel of carbide oriented growth |
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