CN201913211U - Device for improving internal structure of slab - Google Patents
Device for improving internal structure of slab Download PDFInfo
- Publication number
- CN201913211U CN201913211U CN2010206605217U CN201020660521U CN201913211U CN 201913211 U CN201913211 U CN 201913211U CN 2010206605217 U CN2010206605217 U CN 2010206605217U CN 201020660521 U CN201020660521 U CN 201020660521U CN 201913211 U CN201913211 U CN 201913211U
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- light
- slab
- fan
- casting blank
- shaped section
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Abstract
The utility model provides a device for improving an internal structure of a slab, wherein, electromagnetic stirrers and light-pressing lower rollers are used at the same time and are arranged back and forth; the electromagnetic stirrers are fixed at the junction part of a fan-shaped section and a bending section of a continuous casting secondary cooling zone of the slab; and the light-pressing lower rollers are arranged at a solidification tail end at the lower part of the fan-shaped section. A linear magnetic field generated by the electromagnetic stirrers acts on molten steel, so that columnar crystals can be smashed, and more isometric crystals are generated. Light-pressing lower devices positioned at the solidification tail end can compensate the volumetric shrinkage when the molten steel is solidified, a solidified structure can be more uniform and compact, and center segregation and center porosity can be reduced, so that the internal structure of a casting blank can be improved remarkably. The device is adopted to produce the high carbon steel casting blank of mode 45, center porosity, subsurface cracks, core cracks, shrinkage holes and subsurface bubbles of the high carbon steel casting blank of mode 45 can reach zero grade, the center segregation can reach C0.5 grade, and the average value of the equiaxial crystal rate can reach more than 50 percent.
Description
Technical field
The utility model belongs to the continuous casting installation for casting technical field, particularly a kind of compound device that is used to improve the slab interior tissue.
Background technology
Steel billet can produce center segregation and center porosity in the continuous casting and solidifying process, this segregation and loose very big to properties of product harm has worsened the impact flexibility, particularly low-temperature impact toughness of steel and the anti-fatigue performance and the welding performance of product; Serious center segregation and center porosity also can cause centre burst, have become one of restraining factors that improve continuous casting billet quality.
" electromagnetic agitation " technology is to promote molten steel to flow by apply travelling-magnetic-field at the casting machine diverse location, disperses the degree of superheat, makes solidified structure more tiny, improves the internal soundness of strand." gently depressing " technology is at solidification end strand to be carried out shallow draft, volume contraction during with compensation enrichment segregation element solidification of molten steel, the molten steel that prevents this place flows to the strand central cross, thereby make solidified structure even compact more, play the effect that improves center segregation and reduce center porosity.Two kinds of technology can both be improved the internal soundness of strand, and electromagnetic agitating technology can produce wide and thin equiax crystal but can't implement the variation of volume, and the technology of gently depressing can be implemented the variation of volume and can't produce equiax crystal.A lot of about the technical research that two kinds of technology are used separately, but do not appear in the newspapers as yet about the action effect that both are used in combination.
Summary of the invention
The purpose of this utility model aims to provide a kind ofly can produce wide and thin equiaxed grain structure, and the volume contraction in the time of can replenishing the liquid core again and solidify is eliminated shrinkage cavity and loose, improves the compound device of strand internal soundness.
For this reason, the solution taked of the utility model is:
A kind of device that improves the slab interior tissue, comprise magnetic stirrer and light depress roller row, it is characterized in that, magnetic stirrer and light depress roller row are provided with simultaneously, magnetic stirrer is fixed on the intersection of sheet billet continuous casting secondary cooling zone fan-shaped section and bending section, and light depress roller row are placed in the casting blank solidification end of fan-shaped section bottom.
The beneficial effects of the utility model are:
Because the utility model is arranged on the intersection of sheet billet continuous casting secondary cooling zone fan-shaped section and bending section with magnetic stirrer, the linear magnetic field of electromagnetic mixing apparatus generation affacts on the molten steel, can smash column crystal, generates more equiax crystal.And the volume contraction of the light screwdown gear of being located at solidification end can compensate solidification of molten steel the time prevents that molten steel from flowing to the strand central cross, thereby makes solidified structure even compact more, reduces center segregation and center porosity, significantly improves casting blank inner organization.Adopt the utility model to produce 45# high-carbon steel strand, its center porosity, subcrack, core crackle, shrinkage cavity and rimhole are 0 grade, and center segregation is the C0.5 level, and equiaxial crystal ratio mean value reaches more than 50%.
Description of drawings
Accompanying drawing is that the device that improves the slab interior tissue is installed and used view.
Among the figure: crystallizer 1, magnetic stirrer 2, strand 3, light depress roller row 4.
The specific embodiment
By accompanying drawing as seen, the utility model mainly is the secondary cooling zone that magnetic stirrer 2 and light depress roller row 4 is arranged on simultaneously crystallizer 1 bottom, magnetic stirrer 2 is fixed on the fan-shaped section of sheet billet continuous casting secondary cooling zone and the intersection of bending section, and light 4 of depress roller row are installed in the end that fan-shaped section bottom strand 3 solidifies.With 200 * 1450 mm slab casters, producing 45# high-carbon steel is example, thick 200 mm of base, 20 ℃ of the degrees of superheat, pulling rate 1.5 m/min, electromagnetic agitation electric current 380A, frequency 3.5Hz is that reduction ratio 0.8mm/m is depressed in 0.4～0.7 zone at strand center solid rate, produce 10 stoves continuously, production run is steady.With dendrite check strand grain structure, its strand internal soundness significantly improves.
Claims (1)
1. device that improves the slab interior tissue, comprise magnetic stirrer and light depress roller row, it is characterized in that, magnetic stirrer and light depress roller row are provided with simultaneously, magnetic stirrer is fixed on the intersection of sheet billet continuous casting secondary cooling zone fan-shaped section and bending section, and light depress roller row are placed in the casting blank solidification end of fan-shaped section bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206605217U CN201913211U (en) | 2010-12-15 | 2010-12-15 | Device for improving internal structure of slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206605217U CN201913211U (en) | 2010-12-15 | 2010-12-15 | Device for improving internal structure of slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201913211U true CN201913211U (en) | 2011-08-03 |
Family
ID=44413027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206605217U Expired - Fee Related CN201913211U (en) | 2010-12-15 | 2010-12-15 | Device for improving internal structure of slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201913211U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226949A (en) * | 2013-06-19 | 2014-12-24 | 鞍钢股份有限公司 | Method for decreasing degree of segregation of C in castings |
| CN104959562A (en) * | 2015-07-23 | 2015-10-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Large billet heavy rail steel continuous casting method |
| CN104889357B (en) * | 2014-03-05 | 2017-01-11 | 鞍钢股份有限公司 | Method for reducing center segregation and total oxygen content of high-strength steel |
| CN107081413A (en) * | 2017-04-01 | 2017-08-22 | 唐山钢铁集团有限责任公司 | The method for improving Steels for High Rise Buildings continuous casting billet central dense degree |
| CN113118400A (en) * | 2021-04-20 | 2021-07-16 | 东北大学 | Homogenized slab continuous casting production method under outfield cooperative control action |
| CN113134585A (en) * | 2021-04-20 | 2021-07-20 | 东北大学 | Homogenization square billet continuous casting production method under action of outfield cooperative control |
-
2010
- 2010-12-15 CN CN2010206605217U patent/CN201913211U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226949A (en) * | 2013-06-19 | 2014-12-24 | 鞍钢股份有限公司 | Method for decreasing degree of segregation of C in castings |
| CN104889357B (en) * | 2014-03-05 | 2017-01-11 | 鞍钢股份有限公司 | Method for reducing center segregation and total oxygen content of high-strength steel |
| CN104959562A (en) * | 2015-07-23 | 2015-10-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Large billet heavy rail steel continuous casting method |
| CN107081413A (en) * | 2017-04-01 | 2017-08-22 | 唐山钢铁集团有限责任公司 | The method for improving Steels for High Rise Buildings continuous casting billet central dense degree |
| CN113118400A (en) * | 2021-04-20 | 2021-07-16 | 东北大学 | Homogenized slab continuous casting production method under outfield cooperative control action |
| CN113134585A (en) * | 2021-04-20 | 2021-07-20 | 东北大学 | Homogenization square billet continuous casting production method under action of outfield cooperative control |
| CN113118400B (en) * | 2021-04-20 | 2022-04-22 | 东北大学 | Homogenized slab continuous casting production method under outfield cooperative control action |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20161215 |