CN104775060B - A kind of production of aluminum alloy continuous casting tandem rolling base and heat treatment method - Google Patents
A kind of production of aluminum alloy continuous casting tandem rolling base and heat treatment method Download PDFInfo
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Abstract
The invention belongs to technical field of nonferrous metal processing, the production of more particularly to 5052 aluminum alloy continuous casting tandem rolling bases and heat treatment method.The step of the step of the step of the step of it includes melting, continuous casting, tandem rolling, the step of of batching and heat treatment, it is characterised in that：Ha Ziliete casting and rolling process is used after melting, melting step includes three refinement steps, specially dispensing, the melting of alloy aluminium liquid, initial refining, skim, add alloying element, double refining, adjust alloying component, three refinings, degassing and filtration, standings.The key technology that 5052 alloy plate materials and heat treatment are produced using air-sea flux is solved, the blank of the domestic production technology has been filled up, with higher economic benefit and practical value.
Description
Technical field
The invention belongs to technical field of nonferrous metal processing, at the production of more particularly to 5052 aluminum alloy continuous casting tandem rolling bases and heat
Reason method.
Background technology
5052 alloys be the heat treatment of Al-Mg systems can not enhanced type rust-preventing aluminum alloy, with good formability, solderability,
The characteristics such as moderate strength, are widely used in defence and military and civil area.It is commonly used for the interior trim of automobile, bottle cap, fuel tanker, instrument
Table, various container aluminium sheet alloys, building and ornament materials such as shutter etc., with the development of relevant industries, 5052 aluminium alloys
The demand of sheet material can be increasing.
5052 sheet alloys of production are still produced based on 5052 alloys with hot rolling for base mode both at home and abroad at present, and technology
Very ripe, its technological process is:Melting one purifies one crop end of an ingot casting one, one hot rolling one of heating of milling face one and packed, still
There is the shortcomings of technological process length, production cycle length, high cost and highly energy-consuming in the method；Also Some Enterprises attempt using casting
Roll and produce 5052 aluminum alloy plate materials for base mode, the advantage such as have inexpensive, flow short, environmentally friendly with slab hot-rolling mode compared with,
But the problems such as surface quality and component segregation easily occurs in continuous casting and rolling blank, has influence on the performance of its final cold rolling product；And connect
Casting tandem rolling be two techniques of continuous casting and tandem rolling in succession together with rolling mill practice, the equipment used is U.S. Ha Zilietelian
Tandem mill is cast, first aluminum alloy melt is injected in conticaster and casts out blank, then directly it is rolled by three tandem mills, can be given birth to
More than 2.0mm cast rolled aluminium stock is produced, this technique is also known as air-sea flux, rolling is reheated compared to traditional first casting
And the production technology of continuous casting and rolling eliminate the casting of big plate ingot, ingot blank saw head milling face reheat again, the roughing of big processing capacity
The multiple tracks link such as machine split rolling method, the aluminum finstock tissue characteristic of this technique productions also between casting and semi-continuous casting,
Properties of product are better than continuous casting and rolling plate, but slightly worse compared with hot rolled plate.But air-sea flux is compared with other two kinds of techniques, energy-conservation drop
Consumption, it is cost-effective, with obvious economic benefit and social benefit；Current air-sea flux is few in China's application, production
Technology is also immature, production complex alloys and acquires a certain degree of difficulty during compared with wide plate band, and easily surface segregation is formed during continuous casting
With the casting flaw such as hole this, produce the subsurface inclusion thing aggregation of made-up belt upper surface and influence product surface quality, especially continuous casting
The aluminum alloy hot rolling band of rolling production 5052 has typical variant texture and strong beta rolling texture, annealing and cold rolling energy
It is enough consumingly to influence Mechanical Properties of Aluminum Alloys.It is domestic at present using air-sea flux produce in 5052 alloying technologys also not into
It is ripe, while also lacking the comprehensive analysis to its tissue signature, performance change and stability and research, it is unfavorable for production process
Optimization and the raising of product quality.The development of the technique is set to receive very big limitation
In summary, a kind of 5052 aluminum alloy continuous casting tandem rolling base production and heat-treating methods are developed, are not only changed domestic
At present using air-sea flux produce 5052 aluminum alloy strips it is technologic immature and unstable, make it is cold rolling after sheet material power
Learn performance and meet and use upper requirement, while also provided the necessary technical deposit to mass produce 5052 sheet alloys from now on,
With important theory significance and production practical value；The producer using Ha Ziliete production lines production Aluminum Plate and Strip domestic at present
And it is few, most of manufacturers lack the understanding to Ha Ziliete production lines, so research air-sea flux and heat treatment side
Method is significantly to the technology of this technique productions Aluminum sheets foil.
The content of the invention
It is an object of the invention to provide a kind of production of 5052 aluminum alloy continuous casting tandem rolling blank and heat-treating methods, it is allowed to full
The requirement and the requirement of product quality of the follow-up cold-rolling process of foot.
The purpose of the present invention is realized by following technical proposal
1. the chemical composition of 5052 aluminium alloys of the invention is being shown in Table 1.
The alloy composition unit of table 1：%
2. a kind of production of aluminum alloy continuous casting tandem rolling base and heat treatment method, including the step of the step of melting, continuous casting, company
The step of rolling, the step of batch and the step of heat treatment, it is characterised in that：Ha Ziliete continuous casting and rolling technologies are used after melting
Skill, melting step includes three refinement steps, specially dispensing, the melting of alloy aluminium liquid, initial refining, skim, add alloy first
Element, double refining, adjustment alloying component, three refinings, degassing and filtration, standings.
The casting and rolling process process of the present invention includes：The initial refining one of one alloy aluminium liquid melting of dispensing one is skimmed an addition
One double refining of alloying element-adjustment alloying component-tri- time refining-degassing and filtration-standing-continuous casting-tandem rolling-volume
It take-is heat-treated.
3. melting
In described burden process, in alloying ingredient, electrolytic aluminium liquid is 85wt%, and solid material is 15%, and solid material includes aluminium
Ingot, 5052 waste materials, magnesium ingot and other alloying element dispensings.
First add aluminium ingot, 5052 waste materials and enter electrolytic aluminium liquid, add No. two covertures and use electromagnetic agitation, the temperature of smelting furnace
Degree control is carried out between initial refining in stove, 710 ~ 720 DEG C of refining temperature between for 750 ~ 760 DEG C, and refining uses Ar+Cl2
Refining and electromagnetic agitation, skim, adjusting component adds Fe agent, Si agent, Cr additives, stands reaction after refining.
No. two coverture compositions are by KCl, MgCl2And BaCl2The powder solvent of composition, which is that aluminium alloy is special, to be covered
Lid agent.
Reaction 20min is stood, then carries out double refining, refining temperature is controlled between 720 ~ 750 DEG C, and refining is still used
Ar+Cl2Refining and electromagnetic agitation；Magnesium ingot, sample examination adjusting component are added after composition is qualified；Added by chute before degasification
Bar-shaped Al-5Ti-1B fining agents；Stand and carried out after 10 ~ 20min between third time refining, 725 ~ 745 DEG C of refining temperature, refining is adopted
Use N2+Cl2Refining.
Grain refiner, which enters Ti content after aluminium liquid, will reach 0.015%.
The present invention is handled and on-line filtration online using SINF depassing units.
Before continuous casting and after 20 min of start, hydrogen is surveyed respectively once in preceding case position, and hydrogen content is less than 0.12ml/100gAl；
4. continuous casting
The present invention uses Ha Ziliete conticasters, and the aluminium alloy of continuous casting 5052 uses Y steel band of model, SS lips；Graphite coating system
Half an hour is sprayed once system before casting, and in casting process, breach, which occurs, in strip edge to be sprayed；Cast first half small
Shi Qidong steel brushes are cleared up steel band, then by steel band spraying be changed to that pattern is preliminarily sprayed, steel band is preliminarily sprayed；
The casting parameters of the present invention：
The control of case temperature of aluminum liquid is 670 ~ 700 DEG C before during continuous casting；Cast 35 DEG C of coolant water temperature.
The length of casting region die cavity is 2362mm.
Casting speed：8.0 ~ 9.0m/min of starting up speed, casting speed uses 10 ~ 11m/min.
510 ~ 560 DEG C of caster outlet board temperature edge.
5052 continuous casting billet sizes of above continuous casting process production：19mm×1650mm×L.
5. continuous rolling process
The technological process of tandem rolling：Start confirmation-parameter setting-analog rolling-milling train signal is sent to casting machine-casting
The frame threading of beginning-cutting ends of band materials -3, which bite-is helped, is rolled into the normally rolling of work(- rolling condition foundation-plate form control -.
Tandem rolling road of the present invention sub-distribution：
19mm (continuous casting billet) → 11mm → 6.5mm → 3.7mm.
The continuous rolling process of the present invention is realized in the tandem mill frame milling trains of MINO tri-；Finishing temperature control is between 170 ~ 230 DEG C；
Plate form control is 0.2 ~ 0.5%；Finish to gauge thickness: 5.3±0.05mm；Coil diameter: 1700~1800mm；Strip width：1630~
1640mm。
3. 5052 cast rolled aluminium stock annealing process
It is fast using the continuous billet casting surface cooling velocity of air-sea flux, so surface microstructure is tiny, intercrystalline precipitation
Second mutually its alloying element can not be separated out due to quick cooling, be solid-solubilized in supersaturatedly in matrix, and middle part is cold
But speed is relatively slow a lot；Distribution, form, size surface and the middle difference of second phase, are also easy to produce surface segregation and hole
The casting flaws such as hole；Continuous casting and rolling simultaneously, which produces 5052 aluminum alloy hot rolling bands, has typical variant structure and strong beta rolling
Texture, and Mechanical Properties of Aluminum Alloys can consumingly be influenceed with cold rolling by making annealing treatment.
To eliminate the inhomogeneities of composition and tissue, the coarse grains after finished products are prevented, and obtain good final power
Performance is learned, continuous casting and rolling volume need to be annealed；Annealing process is：Annealing temperature is between 330~360 DEG C, annealing time control
System was at 11~15 hours.
It is as follows using the key technology and advantage of the present invention：
1. the present invention is mainly reflected in the following aspects for the crucial production technology of Ha Ziliete casting and rolling process
Alloying ingredient is：85% electrolytic aluminium liquid, 15% aluminium ingot and magnesium ingot and other alloying element dispensings.
For 5052 aluminium alloy smelting temperature controls between 750 ~ 760 DEG C, refining for the first time uses Ar+Cl2Refining and
Electromagnetic agitation；Double refining temperature control after standing is between 720 ~ 750 DEG C, and refining still uses Ar+Cl2Refining and electromagnetism
Stirring；
The control of case temperature of aluminum liquid is 670 ~ 700 DEG C before during continuous casting；Cast 35 DEG C of coolant water temperature；The length of casting region die cavity is
2362mm；Casting speed：The m/min of starting up speed 8.0 ~ 9.0, casting speed uses 10 ~ 11m/min；Caster outlet strip temperature
Spend 510 ~ 560 DEG C of edge；
Continuous rolling process is:19mm (continuous casting billet) → 11mm → 6.5mm → 3.7mm；Finishing temperature is more than 170 DEG C.
2. the present invention solves the key technology for 5052 aluminum alloy continuous casting tandem rolling base production technologies and heat treatment, for even
Casting connects
The more preferable mouldability of follow-up cold rolling and sheet material of rolling stock provides good structure property basis.It is continuous with using
The technology of cast-rolled strip production sheet material is compared, and by being heat-treated to the plate that air-sea flux is produced, reduces casting process
Form, distribution and the shape of the casting flaws such as the surface segregation of generation, the phase of control second and compound, while changing continuous casting and rolling
Textured finish and component in production process, increase recrystallization texture, and reducing hot rolled plate has typical variant structure and strong beta
Rolling texture, so as to influence the mechanical property and follow-up deep shaping property of follow-up cold rolling rear 5052 aluminum alloy plate materials.
According to 5052 plates of this technique productions, the mechanical property reached after being cold-rolled to 1.23 ~ 0.95 mm is：Tension
Intensity σb：300~310 MPa, elongation percentage δ：3.0%~3.5 %.
In summary, production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base are proposed using the present invention, is solved
The key technology of 5052 alloy plate materials and heat treatment is produced using air-sea flux, the sky of the domestic production technology is solved
In vain, have
Higher economic benefit and practical value.
Embodiment
Below in conjunction with embodiment, the invention will be further elaborated.Embodiment is merely to illustrate the present invention, without
It is to limit the present invention in any way.
Embodiment
Using 85% electrolytic aluminium liquid, 15% solid material（99.70% technical pure aluminium ingot, the waste material of solid 5052, magnesium ingot etc.）Match somebody with somebody
The alloy is made, the furnace charge of the aluminum alloy smelting furnace of 20t capacity is met, chemical composition strictly presses 5052 aluminum alloy chemical composition scopes
Perform.Smelting temperature is set as 750~7600C, initial refining temperature is 7150C, second and third time refining temperature be
7350C；Using SNIF degasification, Al-5Ti-1B crystal grain thinning agent is added by chute before degasification, the control of fining agent addition is
10m/min；Hydrogen content control is within 0.12ml/100gAl in melt；Preceding 680 ± 5 DEG C of case casting temperature, through on-line checking,
Surveying chemical composition is
。
Using Ha Ziliete conticasters, the aluminium alloy of continuous casting 5052 uses Y steel band of model, SS lips；Graphite coating system is in casting
Half an hour is sprayed once before making, and in casting process, breach, which occurs, in strip edge to be sprayed again；Half an hour opens before casting
Dynamic steel brush is cleared up steel band, then by steel band spraying is changed to that pattern is preliminarily sprayed, steel band is preliminarily sprayed.
The control of case temperature of aluminum liquid is 680 ± 5 DEG C before during continuous casting；Cast 35 DEG C of coolant water temperature.
Casting speed：The m/min of starting up speed 8.7, casting speed uses 10.4m/min.
540 DEG C of caster outlet board temperature edge.
5052 continuous casting billet sizes of above continuous casting process production：19mm×1650mm×L.
Continuous rolling process is realized in the tandem mill frame milling trains of MINO tri-；Finishing temperature control is at 200 DEG C；Plate form control is 0.3%；
Finish to gauge thickness: 5.3±0.05mm；Coil diameter：1700~1800mm；1630 ~ 1640mm of strip width.
Tandem rolling road of the present invention sub-distribution：
19mm (continuous casting billet) → 11mm → 6.5mm → 3.7mm.
Above continuous casting and rolling volume is annealed, annealing process is： 340℃/12h
By this plate of 5 batch of technique productions 5052, the mechanical property reached after being cold-rolled to 1.23 and 0.95mm such as table 2.
The mechanical performance index of 5052 cast rolled aluminium stocks, after heat treatment cold rolled sheet that are produced using air-sea flux
Meet mark
Alignment request.
Mechanical property after the cast rolled aluminium stock of table 2 5052 is cold rolling
| Lot number | Alloy | Specification | Tensile strength | Elongation percentage |
| TR4851 | 5052 | 1.23 | 307 | 3.3 |
| TR4852 | 5052 | 1.23 | 300 | 3.5 |
| TR4853 | 5052 | 1.23 | 302 | 3.4 |
| TR4854 | 5052 | 0.95 | 312 | 3.4 |
| TR4855 | 5052 | 0.95 | 310 | 3.5 |
Claims (9)
1. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base, including the step of the step of melting, continuous casting, tandem rolling
Step, the step of batch and the step of heat treatment, it is characterised in that：Ha Ziliete casting and rolling process is used after melting, is melted
Refining step includes three refinement steps, specially dispensing, the melting of alloy aluminium liquid, initial refining, skim, add alloying element, two
Secondary refining, adjustment alloying component, three refinings, degassing and filtration, standings；
The step of melting is：
Alloying ingredient, electrolytic aluminium liquid is 85wt%, and solid material is 15%, solid material include aluminium ingot, 5052 waste materials, magnesium ingot and other
Alloying element dispensing；
First add aluminium ingot, 5052 waste materials and enter electrolytic aluminium liquid, add No. two covertures and use electromagnetic agitation, the temperature control of smelting furnace
System is carried out between initial refining in stove, 710~720 DEG C of refining temperature between 750~760 DEG C, and refining uses Ar+Cl2Refining
And electromagnetic agitation, skimmed after refining, adjusting component adds Fe agent, Si agent, Cr additives, stands reaction；
Reaction 20min is stood, then carries out double refining, refining temperature is controlled between 720~750 DEG C, and refining still uses Ar+
Cl2Refining and electromagnetic agitation；Magnesium ingot, sample examination adjusting component are added after composition is qualified；Rod is added before degasification by chute
Shape Al-5Ti-1B fining agents；Stand and carried out after 10~20min between third time refining, 725~745 DEG C of refining temperature, refining is adopted
Use N2+Cl2Refining.
2. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base as claimed in claim 1, it is characterised in that：It is described
No. two coverture compositions are by KCl, MgCl2And BaCl2The powder solvent of composition, is the special coverture of aluminium alloy.
3. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base as claimed in claim 1, it is characterised in that：Crystal grain
Fining agent, which enters Ti content after aluminium liquid, will reach 0.015%.
4. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base as claimed in claim 1, it is characterised in that：Using
SINF depassing units are handled and on-line filtration online.
5. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base as claimed in claim 1, it is characterised in that：Continuous casting
Using Ha Ziliete conticasters, the aluminium alloy of continuous casting 5052 uses Y steel band of model, SS lips；Graphite coating system is half small before casting
Shi Jinhang is sprayed once, and in casting process, breach, which occurs, in strip edge to be sprayed；Half an hour starts steel brush to steel before casting
Band is cleared up, and then by steel band spraying is changed to that pattern is preliminarily sprayed, steel band is preliminarily sprayed.
6. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base as claimed in claim 5, it is characterised in that continuous casting
Technological parameter is：The control of case temperature of aluminum liquid is 670~700 DEG C before during continuous casting；Cast 35 DEG C of coolant water temperature；The length of casting region die cavity
Spend for 2362mm；Casting speed：8.0~9.0m/min of starting up speed, casting speed uses 10~11m/min；Caster outlet plate
510~560 DEG C of band temperature edge；5052 continuous casting billet sizes of above continuous casting process production：19mm×1650mm×L.
7. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base as claimed in claim 5, it is characterised in that：Continuous casting
After preceding and start 20min, hydrogen is surveyed respectively once in preceding case position, hydrogen content is less than 0.12ml/100gAl.
8. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base as claimed in claim 5, it is characterised in that tandem rolling
Technological process be：Start confirmation-parameter setting-analog rolling-milling train signal sends to casting machine-casting and starts-band
The frame threading of crop -3, which bite-is helped, is rolled into the normally rolling of work(- rolling condition foundation-plate form control -.
9. production and the heat treatment method of a kind of aluminum alloy continuous casting tandem rolling base as claimed in claim 8, it is characterised in that：Tandem rolling
Passage is assigned as：19mm continuous casting billet → 11mm → 6.5mm → 3.7mm；Continuous rolling process is realized in the tandem mill frame milling trains of MINO tri-；
Finishing temperature control is between 170~230 DEG C；Plate form control is 0.2~0.5%；Finish to gauge thickness:5.3±0.05mm；Coil diameter:
1700~1800mm；Strip width：1630~1640mm.
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