CN102181675A - Process for preparing aluminum alloy slab ingot - Google Patents
Process for preparing aluminum alloy slab ingot Download PDFInfo
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- CN102181675A CN102181675A CN 201110089703 CN201110089703A CN102181675A CN 102181675 A CN102181675 A CN 102181675A CN 201110089703 CN201110089703 CN 201110089703 CN 201110089703 A CN201110089703 A CN 201110089703A CN 102181675 A CN102181675 A CN 102181675A
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- aluminium
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- chute
- sound intensity
- degasification
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Abstract
The invention discloses a process for preparing an aluminum alloy slab ingot, which is characterized by comprising the following steps of: performing two passes of on-line degassing on aluminum liquid discharged from a water outlet of a smelting furnace in a chute by using high-purity N2 or Ar, performing two passes of on-line filtering, and performing high-sound intensity ultrasonic treatment; and keeping the temperature of between 485 and 495 DEG C on an aluminum ingot produced from a crystallization furnace, and rolling for 1 to 10 passes by using a rolling mill.
Description
Technical field
The present invention relates to a kind of non-ferrous metal preparation technology, relate in particular to the preparation technology of aluminium alloy flat bloom.
Background technology
At present, the preparation method of aluminium alloy flat bloom is a lot, but following whole or one to two problem of ubiquity: 1,＜40 intercrystalline slag inclusion; 2, the component segregation on the cross section; 3, the grain size on the cross section is inhomogeneous; 4, there is shrinkage porosite (hole) in the centre of ingot.
Summary of the invention
The objective of the invention is to improve a kind of preparation technology who overcomes the aluminium alloy flat bloom of the problems referred to above.
Technical process of the present invention is: aluminium ingot fusing in the smelting furnace, 10 ~ 30 minutes → aluminium of flux winding-up degasification liquid is put into and is left standstill stove and leave standstill the online bipolar filtration of the online twice degasification → chute of 10 ~ 40 minutes → chute → high sound intensity ultrasonic wave → crystallizing wheel → rolling → scale hot shears in T＜780 ℃ → stove.
High-purity N 2 or Ar are used in online twice degasification of described chute.
Described high sound intensity ultrasonication locates to install additional the high sound intensity ultrasonic sound appratus before aluminium liquid enters crystallizing wheel, utilize the high sound intensity ultrasonic wave to improve the homogeneity of composition, effectively solves the component segregation problem.
Described rolling use milling train carries out 1 ~ 10 passage.
After the aluminium liquid after the high sound intensity ultrasonication solidified through the crystallizing wheel water-cooled, crystal grain obtained refinement.To remain on 485 ~ 495 ℃ from the aluminium ingot that crystallizing wheel comes out, and carry out the rolling of 1 ~ 10 passage through milling train again, further thinning microstructure is eliminated inner shrinkage porosite (hole), make organize finer and close.
Through the ingot casting of this explained hereafter, interior tissue is even, and ɑ-Al is fully refinement mutually, and Si is mutually slick and sly tiny, and crystal boundary does not have slag inclusion, the densification of ingot casting section structure, and homogeneous grain size, composition does not have segregation.
Description of drawings
Fig. 1 is the slab ingot metallographic comparison diagram (amplifying 100 times) of prior art and the present invention's preparation.
Fig. 2 is the slab ingot metallographic comparison diagram (amplifying 200 times) of prior art and the present invention's preparation.
Fig. 3 is the slab ingot metallographic comparison diagram ((amplifying 300 times) of prior art and the present invention's preparation.
Fig. 4 is the slab ingot scanning electron microscope comparison diagram (amplifying 100 times) of prior art and the present invention's preparation.
Fig. 5 is the slab ingot scanning electron microscope comparison diagram (amplifying 200 times) of prior art and the present invention's preparation.
Fig. 6 is the slab ingot scanning electron microscope comparison diagram (amplifying 500 times) of prior art and the present invention's preparation.
Fig. 7 is the slab ingot scanning electron microscope comparison diagram (amplifying 1000 times) of prior art and the present invention's preparation.
Fig. 8 is the slab ingot scanning electron microscope comparison diagram (amplifying 2000 times) of prior art and the present invention's preparation.
Fig. 9 is the slab ingot scanning electron microscope comparison diagram (amplifying 5000 times) of prior art and the present invention's preparation.
Embodiment
Technical process of the present invention is: aluminium ingot fusing in the smelting furnace, 10 ~ 30 minutes → aluminium of flux winding-up degasification liquid is put into and is left standstill stove and leave standstill the online bipolar filtration of the online twice degasification → chute of 10 ~ 40 minutes → chute → high sound intensity ultrasonic wave → crystallizing wheel → rolling → scale hot shears in T＜780 ℃ → stove.
Embodiment 1: technical process of the present invention is: aluminium ingot fusing in the smelting furnace, 10 ~ 30 minutes → aluminium of flux winding-up degasification liquid is put into and is left standstill stove and leave standstill the online bipolar filtration of the online twice degasification → chute of 10 ~ 40 minutes → chute → high sound intensity ultrasonic wave → crystallizing wheel → rolling → scale hot shears in T＜780 ℃ → stove.
Use high-purity N 2, the twice on-line filtration is carried out in the online degasification of aluminium liquid process twice to emitting from the smelting furnace water outlet in chute again, carries out the high sound intensity ultrasonication then.Before aluminium liquid enters crystallizing wheel, locate to install additional the high sound intensity ultrasonic sound appratus, utilize the high sound intensity ultrasonic wave to improve the homogeneity of composition, effectively solve the component segregation problem.
After the aluminium liquid after the high sound intensity ultrasonication solidified through the crystallizing wheel water-cooled, crystal grain obtained refinement.To remain on from the aluminium ingot that crystallizing wheel comes out about 485 ℃, and carry out the rolling of 5 passages through milling train again, further thinning microstructure is eliminated inner shrinkage porosite (hole), make organize finer and close.
Embodiment 2: technical process of the present invention is: aluminium ingot fusing in the smelting furnace, 10 ~ 30 minutes → aluminium of flux winding-up degasification liquid is put into and is left standstill stove and leave standstill the online bipolar filtration of the online twice degasification → chute of 10 ~ 40 minutes → chute → high sound intensity ultrasonic wave → crystallizing wheel → rolling → scale hot shears in T＜780 ℃ → stove.
Use high-purity Ar, the twice on-line filtration is carried out in the online degasification of aluminium liquid process twice to emitting from the smelting furnace water outlet in chute again, carries out the high sound intensity ultrasonication then.Before aluminium liquid enters crystallizing wheel, locate to install additional the high sound intensity ultrasonic sound appratus, utilize the high sound intensity ultrasonic wave to improve the homogeneity of composition, effectively solve the component segregation problem.
After the aluminium liquid after the high sound intensity ultrasonication solidified through the crystallizing wheel water-cooled, crystal grain obtained refinement.To remain on 490 ℃ from the aluminium ingot that crystallizing wheel comes out, and carry out the rolling of 7 passages through milling train again, further thinning microstructure is eliminated inner shrinkage porosite (hole), make organize finer and close.
Embodiment 3: technical process of the present invention is: aluminium ingot fusing in the smelting furnace, 10 ~ 30 minutes → aluminium of flux winding-up degasification liquid is put into and is left standstill stove and leave standstill the online bipolar filtration of the online twice degasification → chute of 10 ~ 40 minutes → chute → high sound intensity ultrasonic wave → crystallizing wheel → rolling → scale hot shears in T＜780 ℃ → stove.
Use high-purity N 2, the twice on-line filtration is carried out in the online degasification of aluminium liquid process twice to emitting from the smelting furnace water outlet in chute again, carries out the high sound intensity ultrasonication then.Before aluminium liquid enters crystallizing wheel, locate to install additional the high sound intensity ultrasonic sound appratus, utilize the high sound intensity ultrasonic wave to improve the homogeneity of composition, effectively solve the component segregation problem.
After the aluminium liquid after the high sound intensity ultrasonication solidified through the crystallizing wheel water-cooled, crystal grain obtained refinement.To remain on 495 ℃ from the aluminium ingot that crystallizing wheel comes out, and carry out the rolling of 10 passages through milling train again, further thinning microstructure is eliminated inner shrinkage porosite (hole), make organize finer and close.
Claims (4)
1. the preparation technology of an aluminium alloy flat bloom, technology comprises: aluminium ingot fusing in the smelting furnace, flux winding-up degasification is 10 ~ 30 minutes in T＜780 ℃, stove, and aluminium liquid is put into and left standstill stove and left standstill 10 ~ 40 minutes, online twice degasification of chute, the online bipolar filtrations of chute etc. is characterized in that: use high-purity N 2 or Ar, the online degasification of aluminium liquid process twice to emitting from the smelting furnace water outlet in chute, carry out the twice on-line filtration again, carry out the high sound intensity ultrasonication then; Remain on 485 ~ 495 ℃ from crystal growing furnace output aluminium ingot, carry out the rolling of 1 ~ 10 passage with milling train.
2. according to the preparation technology of the described a kind of aluminium alloy flat bloom of claim 1, it is characterized in that: use high-purity N 2, the twice on-line filtration is carried out in the online degasification of aluminium liquid process twice to emitting from the smelting furnace water outlet in chute again, carries out the high sound intensity ultrasonication then; Remain on 485 ℃ from crystal growing furnace output aluminium ingot, carry out the rolling of 5 passages with milling train.
3. according to the preparation technology of the described a kind of aluminium alloy flat bloom of claim 2, it is characterized in that: use high-purity Ar, the twice on-line filtration is carried out in the online degasification of aluminium liquid process twice to emitting from the smelting furnace water outlet in chute again, carries out the high sound intensity ultrasonication then; Remain on 490 ℃ from crystal growing furnace output aluminium ingot, carry out the rolling of 7 passages with milling train.
4. according to the preparation technology of the described a kind of aluminium alloy flat bloom of claim 3, it is characterized in that: use high-purity N 2, the twice on-line filtration is carried out in the online degasification of aluminium liquid process twice to emitting from the smelting furnace water outlet in chute again, carries out the high sound intensity ultrasonication then; Remain on 495 ℃ from crystal growing furnace output aluminium ingot, carry out the rolling of 10 passages with milling train.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110089703 CN102181675A (en) | 2011-04-09 | 2011-04-09 | Process for preparing aluminum alloy slab ingot |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110089703 CN102181675A (en) | 2011-04-09 | 2011-04-09 | Process for preparing aluminum alloy slab ingot |
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| CN102181675A true CN102181675A (en) | 2011-09-14 |
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| CN 201110089703 Pending CN102181675A (en) | 2011-04-09 | 2011-04-09 | Process for preparing aluminum alloy slab ingot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280729A (en) * | 2019-08-06 | 2019-09-27 | 中南大学 | A kind of method that multi-source ultrasonic wave auxiliary D.C.casting prepares big specification 7XXX line aluminium alloy slab ingot |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693012A (en) * | 2005-05-20 | 2005-11-09 | 东北轻合金有限责任公司 | Method for founding aluminium alloy slab ingot |
| US20090000760A1 (en) * | 2007-06-26 | 2009-01-01 | Kang Won Duck | Mold for air-slip type noncircular continuous casting and casting method of aluminum alloy using the same |
| CN101758206A (en) * | 2009-11-11 | 2010-06-30 | 苏州有色金属研究院有限公司 | Casting method capable of improving quality of aluminum and aluminum alloy ingots |
-
2011
- 2011-04-09 CN CN 201110089703 patent/CN102181675A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693012A (en) * | 2005-05-20 | 2005-11-09 | 东北轻合金有限责任公司 | Method for founding aluminium alloy slab ingot |
| US20090000760A1 (en) * | 2007-06-26 | 2009-01-01 | Kang Won Duck | Mold for air-slip type noncircular continuous casting and casting method of aluminum alloy using the same |
| CN101758206A (en) * | 2009-11-11 | 2010-06-30 | 苏州有色金属研究院有限公司 | Casting method capable of improving quality of aluminum and aluminum alloy ingots |
Non-Patent Citations (1)
| Title |
|---|
| 《有色金属加工》 20081031 沈海鸥 用电解铝液生产铝合金扁锭的熔体净化 17-19 1-4 第37卷, 第5期 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280729A (en) * | 2019-08-06 | 2019-09-27 | 中南大学 | A kind of method that multi-source ultrasonic wave auxiliary D.C.casting prepares big specification 7XXX line aluminium alloy slab ingot |
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Application publication date: 20110914 |