CN103769551B - The production technology of a kind of aluminium silicon magnesium system Birmasil - Google Patents
The production technology of a kind of aluminium silicon magnesium system Birmasil Download PDFInfo
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- CN103769551B CN103769551B CN201410021616.7A CN201410021616A CN103769551B CN 103769551 B CN103769551 B CN 103769551B CN 201410021616 A CN201410021616 A CN 201410021616A CN 103769551 B CN103769551 B CN 103769551B
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Abstract
The production technology of a kind of aluminium silicon magnesium system Birmasil.The present invention can solve existing aluminum alloy cast technology for making needle pore defect, macrostructure's coarse grains and the large problem of deviation.The steps include: that in smelting furnace, add silicon, aluminium, magnesium and additive carries out refining, make composition, temperature arrive requirement; Is 10-20cm laid at stove eye 0.5m-1.5m place in its bottom distance? AlTi5B or AlTi5 B alloy wire 1.5-2.5Kg; Open stove eye to release; Treat melting alloy wire in chute, with wire feeder feeding AlTi5B or AlTi5 silk; Semi-continuous casting is carried out, technological parameter: casting temperature 660-715 DEG C, melt flow 105-250Kg/min, casting speed 85-240mm/min, cooling water temperature 15-45 DEG C, cooling water flow 1455-3500L/h when aluminum melt height is 8-12cm in crystallizer.The present invention makes casting crystalline grain degree reach more than 3 grades, and pinhole rate reaches 2 or 1 grades, and physical property surpasses GB.
Description
Technical field
The present invention relates to Alloys Casting technology field, especially the casting technique of aluminium alloy.
Background technology
Alsimay has good casting character, medium mechanical property and good corrosion resistance, and due to its light weight, combination property is good, and particularly founding is superior, is widely used in Aeronautics and Astronautics, defence and military and civil area.
The casting technique of aluminum current silicon magnesium system alloy mainly adopts continuous casting machine
rawproduce trapezoidal ingot, it is in trapezoidal metal die that aluminum melt pours into cross section, and metal die outer surface, through water-cooled, makes the aluminum melt cooling forming in mould.When operating because casting drop is large, liquid fluctuating is larger, easy generation oxide inclusions, add the probability that finished ingot produces needle pore defect, simultaneously because aluminum melt intensity of cooling in grinding tool is relatively weak, and each position cooling condition differs greatly, and causes final alloy pig grain size relatively thick, and the crystal grain at alloy pig edge and center DEG C deviation is comparatively large, reduces physical property and the stability of aluminium alloy ingots.In order to improve the performance of Casting Al-Si magnesium system alloy further, be necessary to improve its casting technique.
Summary of the invention
Object of the present invention is solve the needle pore defect of Casting Al-Si magnesium line aluminium alloy and macrostructure's coarse grains and the larger problem of deviation.
The technical scheme realizing foregoing invention object is as follows:
A production technology for aluminium silicon magnesium system Birmasil, adopts semicontinuous casting technique, and ingot casting cross sectional shape be circle or rectangle or square, and its processing step is as follows:
1) in smelting furnace, add industrial silicon, aluminium ingot, magnesium ingot and additive carry out refining, make composition and temperature arrive the designing requirement of aluminum melt;
2) 10-20cmAlTi5B or AlTi5 B alloy wire 1.5-2.5Kg is laid at its bottom distance stove eye 0.5m-1.5m place;
3) open smelting furnace eye, by meeting composition, the aluminum melt of temperature conditions releases;
4) after the melting alloy wire laid in advance in chute, open wire feeder, feed AlTi5B or AlTi5 silk;
5) when in crystallizer, aluminum melt height reaches 8-12cm, open casting machine and carry out semi-continuous casting, process parameter control is:
Casting temperature 660-715 DEG C
Aluminum melt flow 105-250Kg/min
Casting speed 85-240mm/min
Cooling water temperature 15-45 DEG C
Cooling water flow 1455-3500L/h.
6) use stopper adjust flux, reach stable setting casting speed;
When adopting semicontinuous casting technique to produce, melt flows drop and disturbance reduce relatively, and the slag making taxis of melt in flow process reduces, and the probability that final products needle pore defect is occurred reduces relatively.
Ingot casting cross section is circular or polygon, as ingot casting cross section be circular time, cool in production process more evenly, inner macrostructure crystal grain is more tiny.
AlTi5B(AlTi5 is fed online with wire feeder) object of silk is refining aluminum alloy macrostructure crystal grain, improves final products physical property; Also can play the effect of adjustment chemical analysis in addition.
Dominant mechanism of the present invention is:
pass throughimprove the intensity of cooling of melt in process of setting and cooling uniformity, make the product that final products are produced relative to traditional continuous casting machine
its macrostructurecrystal grain is more tiny and more even, improves product physical property.
The present invention is applicable to the production of other Birmasil, comprises aluminum bronze system, Al-Si-Cu-based, high purity alumina-magnesia etc.
Above technique adopts semicontinuous casting technique, and in casting process, the temperature of aluminum liquid in shunting disk must control within the scope of technological requirement, and extrusion ingot length, every 0.5m tracing detection one-step casting temperature, runaways if occur, should adjust in time.Control each link in operating process well, make liquid level held stationary.According to manufacturing technique requirent, control product casting length well, avoid the generation of long or short chi phenomenon.
Produced high performance Cast aluminium alloy ingot by application the method, grain size reaches more than 3 grades, and pinhole rate reaches 2 grades or 1 grade, and under product ontology tensile sample rod T6 condition of heat treatment, tensile strength δ b is greater than 340MPa, and percentage elongation δ 5 is greater than 7%; Physical property is far above national standard.
Detailed description of the invention
Now by the following example, technical solution of the present invention is described further.
embodiment 1
1) in smelting furnace, add the industrial silicon of 3303 and the above trade mark that calculate, the aluminium ingot meeting and join bag and require is added on industrial silicon top, 1 ~ 3mm potassium or sodium salt aluminum melt coverture is sprinkled at aluminium ingot surface uniform, behind heat solid material to 450 ~ 550 DEG C, add the aluminum melt meeting and join bag and require, solid material in intensification melting furnace, stir and heat up, when in stove, melt temperature reaches between 730 ~ 830 DEG C, add titanium additives (commercially available aluminium titanium intermediate alloy or 75Ti agent), stir 10 ~ 45min, be cooled to 690 ~ 730 DEG C, add metal magnesium ingot, stir 10 ~ 15min, be warming up to 710 ~ 740 DEG C, by injection refining machine, with nitrogen or argon gas for carrier, aluminum melt carbon trichloride refining agent is evenly sprayed in melt, carry out refining slagging-off, nitrogen or argon flow amount are 10 ~ 35NL/min(1000NL/min=1m
3/ min), gas pressure is 0.1 ~ 0.3MPa, and refining agent consumption is 2 ~ 6Kg/t-Al, and refining is complete, and in stove, melt temperature controls at 670 ~ 740 DEG C.
2) 10-25cmAlTi5B or AlTi5 B alloy wire 1.5-2.5Kg is laid at its bottom distance stove eye 0.5m-1.5m place.
3) open smelting furnace eye, the aluminum melt that above-mentioned refining is good is released.
4) after the melting alloy wire laid in advance in chute, open wire feeder, feed AlTi5B or AlTi5 silk;
5) when aluminum melt height reaches 8-12cm in crystallizer, open casting machine and carry out semi-continuous casting, ingot casting cross section is circular, and process parameter control is:
Casting diameter is ZLD114A alloy circle ingot casting (ingot casting quantity is 24) of 112mm.
Casting temperature: 660 DEG C ~ 700 DEG C
Aluminum melt flow is: 150 ~ 155Kg/min
Casting speed: 235 ~ 240mm/min
Cooling water temperature: 15 DEG C ~ 45 DEG C
Cooling water flow: 2050 ~ 2100L/h.
6) use stopper adjust flux, reach stable setting casting speed;
Physical property
。
embodiment 2:
Processing step (1) is identical with embodiment 1 with (6) to (4), and processing step (5) is as follows:
When high DEG C of aluminum melt in crystallizer reaches 8-12cm, open casting machine and carry out semi-continuous casting, ingot casting cross section is polygon, and process parameter control is:
Ingot casting cross section is polygon, and sectional area is 9847mm
2zLD114A alloy cast ingot (ingot casting quantity is 72).
Casting temperature: 660 DEG C ~ 715 DEG C
Aluminum melt flow is: 240 ~ 250Kg/min
Casting speed: 125 ~ 130mm/min
Cooling water temperature: 15 DEG C ~ 45 DEG C
Cooling water flow: 3450 ~ 3500L/h
Physical property
。
embodiment 3:
Processing step (1) is identical with embodiment 1 with (6) to (4), and processing step (5) is as follows:
When high DEG C of aluminum melt in crystallizer reaches 8-12cm, open casting machine and carry out semi-continuous casting, ingot casting cross section is square, and process parameter control is:
Ingot casting cross section is polygon, and sectional area is 37994mm
2zLD114A alloy cast ingot (ingot casting quantity is 12).
Casting temperature: 660 DEG C ~ 715 DEG C
Aluminum melt flow is: 105 ~ 110Kg/min
Casting speed: 85 ~ 90mm/min
Cooling water temperature: 15 DEG C ~ 45 DEG C
Cooling water flow: 1455 ~ 1460L/h
Physical property
。
Each example all reaches goal of the invention above.
Claims (4)
1. a production technology for aluminium silicon magnesium system Birmasil, adopts semicontinuous casting technique, adds wire feeding process, it is characterized by processing step as follows in chute:
(1) in smelting furnace, add industrial silicon, aluminium ingot, magnesium ingot and additive carry out refining, make composition and temperature arrive the designing requirement of aluminum melt;
(2) 10-20cmAlTi5B or AlTi5 B alloy wire 1.5-2.5Kg is laid at its bottom distance stove eye 0.5m-1.5m place;
(3) open smelting furnace eye, by meeting composition, the aluminum melt of temperature conditions releases;
(4) treat that the melting alloy wire laid in advance in chute is complete, open wire feeder, feed AlTi5B or AlTi5 silk;
(5) when in crystallizer, aluminum melt height reaches 8-12cm, open casting machine and carry out semi-continuous casting, process parameter control is:
Casting temperature 660-715 DEG C
Aluminum melt flow 105-250Kg/min
Casting speed 85-240mm/min
Cooling water temperature 15-45 DEG C
Cooling water flow 1455-3500L/h;
(6) use stopper adjust flux, reach stable setting casting speed.
2. the production technology of the aluminium silicon magnesium line aluminium alloy belonging to claim 1, is characterized by the ingot casting cross section of casting machine for circular.
3. the production technology of the aluminium silicon magnesium line aluminium alloy belonging to claim 1, the ingot casting cross section that it is characterized by casting machine is polygon.
4. the production technology of the aluminium silicon magnesium line aluminium alloy belonging to claim 1 or 2 or 3, is characterized by preferred casting technological parameter as follows:
Casting temperature 660-700 DEG C
Aluminum melt flow 150-155Kg/min
Casting speed 235-240mm/min
Cooling water temperature 15-45 DEG C
Cooling water flow 2050-2100L/h.
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| CN111168021B (en) * | 2019-12-11 | 2022-01-25 | 山东创新金属科技有限公司 | Casting process of aluminum alloy round ingot for forging hub |
| CN114769542B (en) * | 2022-03-18 | 2024-03-15 | 云南云铝泽鑫铝业有限公司 | Casting process for bar production of 6-series aluminum-magnesium-silicon alloy |
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| KR20010017893A (en) * | 1999-08-16 | 2001-03-05 | 이구택 | A method for monitoring the casting in the continuous slab caster |
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| CN101333614A (en) * | 2007-06-29 | 2008-12-31 | 东北大学 | Structural material piece of magnesium-containing silumin and method for preparing same |
| CN101417388A (en) * | 2008-12-12 | 2009-04-29 | 江苏大学 | Preparation method of light high-intensity aluminum base home-position composite material for cable bridge frame |
| CN102274956A (en) * | 2011-08-31 | 2011-12-14 | 西南铝业（集团）有限责任公司 | Method for refining grains of 2219 alloy major-diameter round billets |
| CN102888540A (en) * | 2012-10-25 | 2013-01-23 | 江苏常铝铝业股份有限公司 | Aluminum foil for air conditioner having high heat exchange efficiency and manufacturing method thereof |
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Patent Citations (6)
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|---|---|---|---|---|
| KR20010017893A (en) * | 1999-08-16 | 2001-03-05 | 이구택 | A method for monitoring the casting in the continuous slab caster |
| CN1609247A (en) * | 2003-10-22 | 2005-04-27 | 湖南百富瑞材料有限责任公司 | High strength aluminium alloy and producing process |
| CN101333614A (en) * | 2007-06-29 | 2008-12-31 | 东北大学 | Structural material piece of magnesium-containing silumin and method for preparing same |
| CN101417388A (en) * | 2008-12-12 | 2009-04-29 | 江苏大学 | Preparation method of light high-intensity aluminum base home-position composite material for cable bridge frame |
| CN102274956A (en) * | 2011-08-31 | 2011-12-14 | 西南铝业（集团）有限责任公司 | Method for refining grains of 2219 alloy major-diameter round billets |
| CN102888540A (en) * | 2012-10-25 | 2013-01-23 | 江苏常铝铝业股份有限公司 | Aluminum foil for air conditioner having high heat exchange efficiency and manufacturing method thereof |
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| 半连续铸锭缺陷及其预防措施（3）;彭学仕等;《铝加工》;19931028;第16卷(第5期);第1-10页 * |
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