CN108624787A - A kind of radiator aluminum alloy and preparation method thereof - Google Patents
A kind of radiator aluminum alloy and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to technical field of aluminum alloy technology, and in particular to a kind of radiator aluminum alloy and preparation method thereof.Radiator aluminum alloy is made of the raw material of following mass percent：Silicon 0.7 1.1%, magnesium 0.8 1.0%, iron 0.2 0.3%, copper 0.9 1.2%, manganese 0.30 0.45%, zinc 0.8 1.5%, chromium 0.07 0.12%, titanium 0.2 0.4%, zirconium 0.05 0.08%, strontium 0.010 0.025%, scandium 0.01 0.02%, surplus are aluminium and inevitable impurity element.Preparation method includes melting, refining, degasification, cast.The present invention has excellent heat conductivility, corrosion resistance and mechanical performance, and preparation method is simple for process easily-controllable, can significantly improve aluminium alloy micostructure, refines nodularization crystal grain, improves the mechanical strength of alloy, the product comprehensive performance of preparation is superior, stable quality.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology, and in particular to a kind of radiator aluminum alloy and preparation method thereof.
Background technology
Radiator is a kind of device being mainly used for for the easy heat generating components heat dissipation in mechanical equipment or high power electric appliance, more
By aluminium alloy, the materials such as brass or bronze are made.Aluminum alloy materials have higher cost performance and comprehensive performance, have become at present
First choice in terms of radiator material.
But there is the deficiencies of not high mechanical strength, poor corrosion resistance, bad thermal conductivity more in existing radiator aluminum alloy,
Limit its application；And aluminium alloy easily forms stomata, loose, the defects of being mingled in preparation process, directly affects aluminium alloy casting
Physical property, mechanical property and the performance of part, yields is low, production efficiency is not high.
Invention content
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of mechanical strengths
High and radiator aluminum alloy with good corrosion resistance and thermal conductivity.
The present invention another mesh be to provide a kind of radiator aluminum alloy preparation method, this method is simple for process easily-controllable,
The product comprehensive performance of preparation is superior, product quality stablize, high mechanical strength and have good corrosion resistance and thermal conductivity
Energy.
The purpose of the invention is achieved by the following technical solution：
A kind of radiator aluminum alloy is made of the raw material of following mass percent：
Silicon 0.7-1.1%, magnesium 0.8-1.0%, iron 0.2-0.3%, copper 0.9-1.2%, manganese 0.30-0.45%, zinc 0.8-
1.5%, chromium 0.07-0.12%, titanium 0.2-0.4%, zirconium 0.05-0.08%, strontium 0.010-0.025%, scandium 0.01-0.02%,
Surplus is aluminium and inevitable impurity element.
Further, the mass percent of the inevitable impurity element is not more than 0.1%.
The present invention adds the members such as zirconium, scandium by the way that the component ratios such as silicon, magnesium, copper in aluminium alloy are designed and are adjusted
Element, each ingredient cooperate, and the heterogeneous microstructure enabled aluminum alloy to is optimized, and the thermal conductivity of radiator aluminum alloy is improved
Can, while improving the corrosion resistance and mechanical performance of radiator aluminum alloy.
Another object of the present invention is achieved through the following technical solutions：
A kind of preparation method of radiator aluminum alloy, includes the following steps：
(1) aluminium ingot is devoted into smelting furnace, is heated to 660-705 DEG C, melting；It is added by the 0.2-0.3% of quality of ingot aluminum
Deslagging agent removes the gred；Molten aluminum after slagging-off is continued to be heated to 715-730 DEG C, is then proportionally added into aluminium-silicon intermediate alloy, aluminium-
Copper intermediate alloy, aluminium-manganese intermediate alloy, aluminium-chromium intermediate alloy, aluminium-titanium intermediate alloy, Al-Zr middle alloy, among aluminium-strontium
Alloy, aluminium-bearing master alloy and magnesium, iron, zinc, mixing；
(2) control temperature of aluminum liquid is 715-730 DEG C, and control temperature of aluminum liquid is 715-730 DEG C, refining agent is added, and use
Inert gas carries out purging refining, stands aluminium alloy melt after the completion of refining；
(3) online degasification is carried out to aluminum melt after standing；
(4) slagging-off is filtered to aluminum melt after degasification；
(5) aluminum melt after filtering and removing slag is cast in casting mould, aluminium alloy extrusions is obtained after cooling treatment.
The present invention removes the gred after first melting aluminium ingot, adds aluminium-titanium intermediate alloy, Al-Zr middle alloy, among aluminium-strontium
The intermediate alloys such as alloy, aluminium-bearing master alloy and other simple metal material, can refining aluminum alloy heterogeneous microstructure, hinder brilliant
Grain length is big and recrystallizes, and can reduce the harm of impurity, improves mechanical performance and the plastic processing of material, reduces rough surface
Degree.
Further, in the step (1), the mass percent of silicon is 12-15% in aluminium-silicon intermediate alloy, in Solder for Al-Cu Joint Welding
Between in alloy the mass percent of copper be 35-45%, the mass percent of manganese is 8-10% in aluminium-manganese intermediate alloy, in aluminium-chromium
Between in alloy the mass percent of chromium be 1-2%, the mass percent of titanium is 19-12% in aluminium-titanium intermediate alloy, in aluminum-zirconium
Between in alloy the mass percent of zirconium be 6-8%, the mass percent of strontium is 2-3% in aluminium-strontium intermediate alloy, among aluminium-scandium
The mass percent of scandium is 3-5% in alloy.
Further, in the step (1), aluminium ingot melting is using supersound process 6-10min, the supersonic frequency 16-
20kHz, ultrasound intensity 1.00kW/cm2-1.15kW/cm2。
Further, in the step (1), after aluminium ingot is mixed with intermediate alloy and magnesium, iron, zinc, using supersound process
8-15min, ultrasound intensity 1.00kW/cm2-1.15kW/cm2, the supersonic frequency is 16-20kHz.
By be ultrasonically treated, aluminium ingot fusing after with aluminium-titanium intermediate alloy, Al-Zr middle alloy, aluminium-strontium intermediate alloy,
The intermediate alloys such as aluminium-bearing master alloy and the mixing of other simple metal material, make the crystal grain of crystal growth by impact shock wave drastically
It smashes, it is suppressed that crystal grain is grown up, and while so that crystal grain is obtained refinement, crystal has also obtained even dispersion, to enable aluminum alloy to
Heterogeneous microstructure optimized, reduce the surface roughness and defect of aluminium alloy.
Further, in the step (2), the inert gas is argon gas, and the pressure of the argon gas is 0.3-0.5MPa,
Refining time is 20-25min, is purged to the dross on molten aluminum surface in refining process, by aluminium alloy melt after the completion of refining
It stands, time of repose 15-20min；
Further, in the step (2), the refining agent is made of the raw material of following parts by weight：Potassium fluoroaluminate 15-20
Part, 5-7 parts of attapulgite, 8-12 parts of calcirm-fluoride, 12-16 parts of potassium carbonate, 5-8 parts of barium sulfate, 4-6 parts of magnesium nitride, carbon trichloride
6-10 parts, 2-4 parts of anhydrous Aluminum chloride, 2-3 parts of activated carbon.
The refining agent of the present invention, degasification, slagging-off effect are good, are suitable for the refining of high-quality aluminum alloy, hence it is evident that improve finished product
Rate, and sodium salt is free of, the sodium salt in existing refining agent is efficiently solved to reducing fluidity of molten, the low-alloyed casting character of drop
Adverse effect, treated molten aluminum inner air vent and oxide inclusion content significantly reduce, and pinhole rate can reach 1-2 grades of standards,
Oxide inclusion is at 2 grades or so.
Further, in the step (3), using the online degasification method degasification of two level, the online degasification of the first order uses argon
Gas and chlorine mixed gas degasification, mixed gas flow 2-3m3/ t aluminum melts, the wherein flow-rate ratio of argon gas and chlorine are 1:
0.03-0.05；The online degasification in the second level uses argon gas degasification, argon flow amount 2-3m3/ t aluminum melts.
Further, in the step (5), the aluminum melt after cast is cooled to room temperature with 120-140 DEG C/h rates, places
22-26h；It is warming up to 300-320 DEG C with the rate of 80-90 DEG C/h again, keeps the temperature 2-3h；Then with the rate liter of 100-120 DEG C/h
Temperature keeps the temperature 2-3h to 450-480 DEG C；It is cooled to 160-200 DEG C with the rate of 40-50 DEG C/h again, keeps the temperature 2-3h；Again with 60-80
DEG C/rate of h is cooled to room temperature, it is finally putting into liquid nitrogen and handles 90-120min, take out.The present invention by above-mentioned treatment process,
Aluminium alloy plasticity at room temperature is improved, and improves cold and hot deformation technique, alloy is made to be squeezed with tiny grain structure and height
Performance is pressed, its machining property is improved, improves mechanical strength.
Beneficial effects of the present invention：The present invention is by being designed and adjusting to the component ratios such as silicon, magnesium, copper in aluminium alloy
Whole, and add the elements such as zirconium, scandium, each ingredient cooperates, and radiator aluminum alloy is made to have excellent heat conductivility, corrosion-resistant
Property and mechanical performance.The preparation method of aluminium alloy is simple for process easily-controllable, can significantly improve aluminium alloy micostructure, and refinement nodularization is brilliant
Grain changes the second phase morphology, improves the mechanical strength of alloy, and the product comprehensive performance of preparation is superior, and product quality is stablized, and has
Good corrosion resistance and heat conductivility.
Specific implementation mode
For the ease of the understanding of those skilled in the art, with reference to embodiment, the present invention is further illustrated, real
The content that the mode of applying refers to not is limitation of the invention.
Embodiment 1
In the present embodiment, a kind of radiator aluminum alloy is made of the raw material of following mass percent：
Silicon 0.7%, magnesium 1.0%, iron 0.2%, copper 1.2%, manganese 0.30%, zinc 1.5%, chromium 0.07%, titanium 0.4%, zirconium
0.05%, strontium 0.025%, scandium 0.01%, surplus are aluminium and inevitable impurity element.
Further, the mass percent of the inevitable impurity element is not more than 0.1%.
In the present embodiment, a kind of preparation method of radiator aluminum alloy includes the following steps：
(1) aluminium ingot is devoted into smelting furnace, is heated to 660 DEG C, melting；It is removed by 0.2% addition deslagging agent of quality of ingot aluminum
Slag；Molten aluminum after slagging-off is continued to be heated to 715 DEG C, be then proportionally added into aluminium-silicon intermediate alloy, Solder for Al-Cu Joint Welding intermediate alloy,
In aluminium-manganese intermediate alloy, aluminium-chromium intermediate alloy, aluminium-titanium intermediate alloy, Al-Zr middle alloy, aluminium-strontium intermediate alloy, aluminium-scandium
Between alloy and magnesium, iron, zinc, mixing；
(2) control temperature of aluminum liquid is 715 DEG C, refining agent is added, and carry out purging refining using inert gas, refining is completed
Aluminium alloy melt is stood afterwards；
(3) online degasification is carried out to aluminum melt after standing；
(4) slagging-off is filtered to aluminum melt after degasification；
(5) aluminum melt after filtering and removing slag is cast in casting mould, aluminium alloy extrusions is obtained after cooling treatment.
Further, in the step (1), the mass percent of silicon is 12% in aluminium-silicon intermediate alloy, among Solder for Al-Cu Joint Welding
The mass percent of copper is 35% in alloy, and the mass percent of manganese is 8% in aluminium-manganese intermediate alloy, in aluminium-chromium intermediate alloy
The mass percent of chromium is 1%, and the mass percent of titanium is 9% in aluminium-titanium intermediate alloy, the matter of zirconium in Al-Zr middle alloy
It is 6% to measure percentage, and the mass percent of strontium is 2% in aluminium-strontium intermediate alloy, the quality percentage of scandium in aluminium-bearing master alloy
Than being 3%.
Further, in the step (1), aluminium ingot melting is surpassed using 6min, the supersonic frequency 16kHz is ultrasonically treated
Sound intensity 1.00kW/cm2。
Further, in the step (1), after aluminium ingot is mixed with intermediate alloy and magnesium, iron, zinc, using supersound process
8min, ultrasound intensity 1.00kW/cm2, the supersonic frequency is 16kHz.
Further, in the step (2), the inert gas is argon gas, and the pressure of the argon gas is 0.3MPa, refining
Time is 20min, is purged to the dross on molten aluminum surface in refining process, stands aluminium alloy melt after the completion of refining, quiet
It is 15min to set the time；
Further, in the step (2), the refining agent is made of the raw material of following parts by weight：15 parts of potassium fluoroaluminate,
5 parts of attapulgite, 8 parts of calcirm-fluoride, 12 parts of potassium carbonate, 5 parts of barium sulfate, 4 parts of magnesium nitride, 6 parts of carbon trichloride, anhydrous Aluminum chloride 2
Part, 2 parts of activated carbon.
Further, in the step (3), using the online degasification method degasification of two level, the online degasification of the first order uses argon
Gas and chlorine mixed gas degasification, mixed gas flow 2m3/ t aluminum melts, the wherein flow-rate ratio of argon gas and chlorine are 1:
0.03；The online degasification in the second level uses argon gas degasification, argon flow amount 2m3/ t aluminum melts.
Further, in the step (5), the aluminum melt after cast is cooled to room temperature with 120 DEG C/h rates, places 22h；
300 DEG C are warming up to the rate of 80 DEG C/h again, keeps the temperature 2h；Then 450 DEG C are warming up to the rate of 100 DEG C/h, keep the temperature 2h；Again with
The rate of 40 DEG C/h is cooled to 160 DEG C, keeps the temperature 2h；It is cooled to room temperature again with the rate of 50 DEG C/h, is finally putting into liquid nitrogen and handles
90min takes out.
Embodiment 2
The present embodiment difference from example 1 is that：
In the present embodiment, a kind of radiator aluminum alloy is made of the raw material of following mass percent：
Silicon 1.1%, magnesium 0.8%, iron 0.3%, copper 0.9%, manganese 0.45%, zinc 0.8%, chromium 0.12%, titanium 0.2%, zirconium
0.08%, strontium 0.010%, scandium 0.02%, surplus are aluminium and inevitable impurity element.
Further, the mass percent of the inevitable impurity element is not more than 0.1%.
In the present embodiment, a kind of preparation method of radiator aluminum alloy includes the following steps：
(1) aluminium ingot is devoted into smelting furnace, is heated to 705 DEG C, melting；It is removed by 0.3% addition deslagging agent of quality of ingot aluminum
Slag；Molten aluminum after slagging-off is continued to be heated to 730 DEG C, be then proportionally added into aluminium-silicon intermediate alloy, Solder for Al-Cu Joint Welding intermediate alloy,
In aluminium-manganese intermediate alloy, aluminium-chromium intermediate alloy, aluminium-titanium intermediate alloy, Al-Zr middle alloy, aluminium-strontium intermediate alloy, aluminium-scandium
Between alloy and magnesium, iron, zinc, mixing；
(2) control temperature of aluminum liquid is 730 DEG C, refining agent is added, and carry out purging refining using inert gas, refining is completed
Aluminium alloy melt is stood afterwards；
(3) online degasification is carried out to aluminum melt after standing；
(4) slagging-off is filtered to aluminum melt after degasification；
(5) aluminum melt after filtering and removing slag is cast in casting mould, aluminium alloy extrusions is obtained after cooling treatment.
Further, in the step (1), the mass percent of silicon is 15% in aluminium-silicon intermediate alloy, among Solder for Al-Cu Joint Welding
The mass percent of copper is 45% in alloy, and the mass percent of manganese is 10% in aluminium-manganese intermediate alloy, aluminium-chromium intermediate alloy
The mass percent of middle chromium is 2%, and the mass percent of titanium is 12% in aluminium-titanium intermediate alloy, zirconium in Al-Zr middle alloy
Mass percent is 8%, and the mass percent of strontium is 3% in aluminium-strontium intermediate alloy, the quality hundred of scandium in aluminium-bearing master alloy
Divide than being 5%.
Further, in the step (1), aluminium ingot melting is surpassed using 10min, the supersonic frequency 20kHz is ultrasonically treated
Sound intensity 1.15kW/cm2。
Further, in the step (1), after aluminium ingot is mixed with intermediate alloy and magnesium, iron, zinc, using supersound process
15min, ultrasound intensity 1.15kW/cm2, the supersonic frequency is 16-20kHz.
Further, in the step (2), the inert gas is argon gas, and the pressure of the argon gas is 0.5MPa, refining
Time is 25min, is purged to the dross on molten aluminum surface in refining process, stands aluminium alloy melt after the completion of refining, quiet
It is 20min to set the time；
Further, in the step (2), the refining agent is made of the raw material of following parts by weight：20 parts of potassium fluoroaluminate,
7 parts of attapulgite, 12 parts of calcirm-fluoride, 16 parts of potassium carbonate, 8 parts of barium sulfate, 6 parts of magnesium nitride, 10 parts of carbon trichloride, anhydrous Aluminum chloride
4 parts, 3 parts of activated carbon.
Further, in the step (3), using the online degasification method degasification of two level, the online degasification of the first order uses argon
Gas and chlorine mixed gas degasification, mixed gas flow 3m3/ t aluminum melts, the wherein flow-rate ratio of argon gas and chlorine are 1:
0.05；The online degasification in the second level uses argon gas degasification, argon flow amount 3m3/ t aluminum melts.
Further, in the step (5), the aluminum melt after cast is cooled to room temperature with 140 DEG C/h rates, places 26h；
It is warming up to 300-320 DEG C with the rate of 90 DEG C/h again, keeps the temperature 3h；Then 480 DEG C are warming up to the rate of 120 DEG C/h, keep the temperature 3h；
200 DEG C are cooled to the rate of 50 DEG C/h again, keeps the temperature 3h；It is cooled to room temperature, is finally putting into liquid nitrogen with the rate of 80 DEG C/h again
120min is handled, is taken out.
Embodiment 3
In the present embodiment, a kind of radiator aluminum alloy is made of the raw material of following mass percent：
Silicon 1.0%, magnesium 0.9%, iron 0.25%, copper 1.1%, manganese 0.40%, zinc 1.2%, chromium 0.09%, titanium 0.3%, zirconium
0.05-0.08%, strontium 0.020%, scandium 0.015%, surplus are aluminium and inevitable impurity element.
Further, the mass percent of the inevitable impurity element is not more than 0.1%.
In the present embodiment, a kind of preparation method of radiator aluminum alloy includes the following steps：
(1) aluminium ingot is devoted into smelting furnace, is heated to 700 DEG C, melting；It is removed by 0.25% addition deslagging agent of quality of ingot aluminum
Slag；Molten aluminum after slagging-off is continued to be heated to 720 DEG C, be then proportionally added into aluminium-silicon intermediate alloy, Solder for Al-Cu Joint Welding intermediate alloy,
In aluminium-manganese intermediate alloy, aluminium-chromium intermediate alloy, aluminium-titanium intermediate alloy, Al-Zr middle alloy, aluminium-strontium intermediate alloy, aluminium-scandium
Between alloy and magnesium, iron, zinc, mixing；
(2) control temperature of aluminum liquid is 720 DEG C, refining agent is added, and carry out purging refining using inert gas, refining is completed
Aluminium alloy melt is stood afterwards；
(3) online degasification is carried out to aluminum melt after standing；
(4) slagging-off is filtered to aluminum melt after degasification；
(5) aluminum melt after filtering and removing slag is cast in casting mould, aluminium alloy extrusions is obtained after cooling treatment.
Further, in the step (1), the mass percent of silicon is 14% in aluminium-silicon intermediate alloy, among Solder for Al-Cu Joint Welding
The mass percent of copper is 40% in alloy, and the mass percent of manganese is 9% in aluminium-manganese intermediate alloy, in aluminium-chromium intermediate alloy
The mass percent of chromium is 1.5%, and the mass percent of titanium is 11% in aluminium-titanium intermediate alloy, zirconium in Al-Zr middle alloy
Mass percent is 7%, and the mass percent of strontium is 2.5% in aluminium-strontium intermediate alloy, the quality of scandium in aluminium-bearing master alloy
Percentage is 4%.
Further, in the step (1), aluminium ingot melting is surpassed using 8min, the supersonic frequency 18kHz is ultrasonically treated
Sound intensity 1.10kW/cm2。
Further, in the step (1), after aluminium ingot is mixed with intermediate alloy and magnesium, iron, zinc, using supersound process
12min, ultrasound intensity 1.10kW/cm2, the supersonic frequency is 18kHz.
Further, in the step (2), the inert gas is argon gas, and the pressure of the argon gas is 0.4MPa, refining
Time is 22min, is purged to the dross on molten aluminum surface in refining process, stands aluminium alloy melt after the completion of refining, quiet
It is 18min to set the time；
Further, in the step (2), the refining agent is made of the raw material of following parts by weight：18 parts of potassium fluoroaluminate,
6 parts of attapulgite, 9 parts of calcirm-fluoride, 14 parts of potassium carbonate, 7 parts of barium sulfate, 5 parts of magnesium nitride, 7 parts of carbon trichloride, anhydrous Aluminum chloride 3
Part, 2.5 parts of activated carbon.
Further, in the step (3), using the online degasification method degasification of two level, the online degasification of the first order uses argon
Gas and chlorine mixed gas degasification, mixed gas flow 2.5m3/ t aluminum melts, the wherein flow-rate ratio of argon gas and chlorine are 1:
0.034；The online degasification in the second level uses argon gas degasification, argon flow amount 2.5m3/ t aluminum melts.
Further, in the step (5), the aluminum melt after cast is cooled to room temperature with 130 DEG C/h rates, places for 24 hours；
310 DEG C are warming up to the rate of 85 DEG C/h again, keeps the temperature 2.5h；Then 460 DEG C are warming up to the rate of 100-120 DEG C/h, heat preservation
2.5h；180 DEG C are cooled to the rate of 45 DEG C/h again, keeps the temperature 2.5h；It is cooled to room temperature, is finally putting into the rate of 60 DEG C/h again
100min is handled in liquid nitrogen, is taken out.
Embodiment 4
In the present embodiment, a kind of radiator aluminum alloy is made of the raw material of following mass percent：
Silicon 0.9%, magnesium 0.9%, iron 0.26%, copper 0.95%, manganese 0.35%, zinc 0.8-1.5%, chromium 0.09%, titanium
0.3%, zirconium 0.06%, strontium 0.020%, scandium 0.018%, surplus are aluminium and inevitable impurity element.
Further, the mass percent of the inevitable impurity element is not more than 0.1%.
In the present embodiment, a kind of preparation method of radiator aluminum alloy includes the following steps：
(1) aluminium ingot is devoted into smelting furnace, is heated to 690 DEG C, melting；Slagging-off is added by the 0.2-0.3% of quality of ingot aluminum
Agent removes the gred；Molten aluminum after slagging-off is continued to be heated to 725 DEG C, is then proportionally added into aluminium-silicon intermediate alloy, Solder for Al-Cu Joint Welding centre is closed
Gold, aluminium-manganese intermediate alloy, aluminium-chromium intermediate alloy, aluminium-titanium intermediate alloy, Al-Zr middle alloy, aluminium-strontium intermediate alloy, aluminium-
Bearing master alloy and magnesium, iron, zinc, mixing；
(2) control temperature of aluminum liquid is 725 DEG C, refining agent is added, and carry out purging refining using inert gas, refining is completed
Aluminium alloy melt is stood afterwards；
(3) online degasification is carried out to aluminum melt after standing；
(4) slagging-off is filtered to aluminum melt after degasification；
(5) aluminum melt after filtering and removing slag is cast in casting mould, aluminium alloy extrusions is obtained after cooling treatment.
Further, in the step (1), the mass percent of silicon is 14% in aluminium-silicon intermediate alloy, among Solder for Al-Cu Joint Welding
The mass percent of copper is 38% in alloy, and the mass percent of manganese is 9% in aluminium-manganese intermediate alloy, in aluminium-chromium intermediate alloy
The mass percent of chromium is 1.6%, and the mass percent of titanium is 11% in aluminium-titanium intermediate alloy, zirconium in Al-Zr middle alloy
Mass percent is 7%, and the mass percent of strontium is 2% in aluminium-strontium intermediate alloy, the quality hundred of scandium in aluminium-bearing master alloy
Divide than being 4%.
Further, in the step (1), aluminium ingot melting is surpassed using 7min, the supersonic frequency 20kHz is ultrasonically treated
Sound intensity 1.15kW/cm2。
Further, in the step (1), after aluminium ingot is mixed with intermediate alloy and magnesium, iron, zinc, using supersound process
12min, ultrasound intensity 1.15kW/cm2, the supersonic frequency is 20kHz.
Further, in the step (2), the inert gas is argon gas, and the pressure of the argon gas is 0.35MPa, essence
The refining time is 20min, is purged to the dross on molten aluminum surface in refining process, stands aluminium alloy melt after the completion of refining,
Time of repose is 20min；
Further, in the step (2), the refining agent is made of the raw material of following parts by weight：17 parts of potassium fluoroaluminate,
6 parts of attapulgite, 9 parts of calcirm-fluoride, 14 parts of potassium carbonate, 7 parts of barium sulfate, 6 parts of magnesium nitride, 7 parts of carbon trichloride, anhydrous Aluminum chloride 3
Part, 2 parts of activated carbon.
Further, in the step (3), using the online degasification method degasification of two level, the online degasification of the first order uses argon
Gas and chlorine mixed gas degasification, mixed gas flow 2m3/ t aluminum melts, the wherein flow-rate ratio of argon gas and chlorine are 1:
0.03；The online degasification in the second level uses argon gas degasification, argon flow amount 3m3/ t aluminum melts.
Further, in the step (5), the aluminum melt after cast is cooled to room temperature with 130 DEG C/h rates, places for 24 hours；
It is warming up to 300-320 DEG C with the rate of 90 DEG C/h again, keeps the temperature 2h；Then 480 DEG C are warming up to the rate of 110 DEG C/h, keep the temperature 3h；
170 DEG C are cooled to the rate of 50 DEG C/h again, keeps the temperature 3h；It is cooled to room temperature, is finally putting into liquid nitrogen with the rate of 80 DEG C/h again
90min is handled, is taken out.
Embodiment 5
The present embodiment and embodiment 3 the difference is that：
In the present embodiment, a kind of radiator aluminum alloy is made of the raw material of following mass percent：
Silicon 0.8%, magnesium 0.85%, iron 0.22%, copper 1.1%, manganese 0.35%, zinc 1.4%, chromium 0.09%, titanium 0.35%,
Zirconium 0.06%, strontium 0.015%, scandium 0.016%, surplus are aluminium and inevitable impurity element.
It is 210-240W/Km by radiator aluminum alloy thermal conductivity made from the present embodiment 1-5, Tensile strength is
360-400MPa, yield strength 270-310MPa, intercrystalline corrosion drag are not less than level Four, and anti-strip corrosive nature is in PA
Grade.Wherein, intercrystalline corrosion drag is measured using GB/T 7998-2005 aluminium alloy intercrystalline corrosion assay methods, anti-strip corrosivity
It can be measured using the Peeling Corrosion test method of GB/T 22639-2008 aluminium alloy converted products.The radiator aluminium of the present invention
Alloy has excellent heat conductivility, mechanical strength and corrosion resistance.
Above-described embodiment is the preferable implementation of the present invention, and in addition to this, the present invention can be realized with other manner,
Any obvious replacement is not departed under the premise of present inventive concept within protection scope of the present invention.
Claims (10)
1. a kind of radiator aluminum alloy, it is characterised in that：It is made of the raw material of following mass percent：
Silicon 0.7-1.1%, magnesium 0.8-1.0%, iron 0.2-0.3%, copper 0.9-1.2%, manganese 0.30-0.45%, zinc 0.8-
1.5%, chromium 0.07-0.12%, titanium 0.2-0.4%, zirconium 0.05-0.08%, strontium 0.010-0.025%, scandium 0.01-0.02%,
Surplus is aluminium and inevitable impurity element.
2. radiator aluminum alloy according to claim 1, it is characterised in that：The matter of the inevitable impurity element
It measures percentage and is not more than 0.1%.
3. according to the preparation method of claim 1-2 any one of them radiator aluminum alloys, it is characterised in that：Including following
Step：
(1) aluminium ingot is devoted into smelting furnace, is heated to 660-705 DEG C, melting；Slagging-off is added by the 0.2-0.3% of quality of ingot aluminum
Agent removes the gred；Molten aluminum after slagging-off is continued to be heated to 715-730 DEG C, is then proportionally added into aluminium-silicon intermediate alloy, Solder for Al-Cu Joint Welding
Between alloy, aluminium-manganese intermediate alloy, aluminium-chromium intermediate alloy, aluminium-titanium intermediate alloy, Al-Zr middle alloy, aluminium-strontium intermediate alloy,
Aluminium-bearing master alloy and magnesium, iron, zinc, mixing；
(2) control temperature of aluminum liquid is 715-730 DEG C, refining agent is added, and carry out purging refining using inert gas, refining is completed
Aluminium alloy melt is stood afterwards；
(3) online degasification is carried out to aluminum melt after standing；
(4) slagging-off is filtered to aluminum melt after degasification；
(5) aluminum melt after filtering and removing slag is cast in casting mould, aluminium alloy extrusions is obtained after cooling treatment.
4. the preparation method of radiator aluminum alloy according to claim 3, it is characterised in that：In the step (1),
The mass percent of silicon is 12-15% in aluminium-silicon intermediate alloy, and the mass percent of copper is 35- in Solder for Al-Cu Joint Welding intermediate alloy
45%, the mass percent of manganese is 8-10% in aluminium-manganese intermediate alloy, and the mass percent of chromium is 1- in aluminium-chromium intermediate alloy
2%, the mass percent of titanium is 19-12% in aluminium-titanium intermediate alloy, and the mass percent of zirconium is 6- in Al-Zr middle alloy
8%, the mass percent of strontium is 2-3% in aluminium-strontium intermediate alloy, and the mass percent of scandium is 3- in aluminium-bearing master alloy
5%.
5. the preparation method of radiator aluminum alloy according to claim 3, it is characterised in that：In the step (1), aluminium
Ingot melting is using supersound process 6-10min, the supersonic frequency 16-20kHz, ultrasound intensity 1.00kW/cm2-1.15kW/cm2。
6. the preparation method of radiator aluminum alloy according to claim 3, it is characterised in that：In the step (1), aluminium
After ingot is mixed with intermediate alloy and magnesium, iron, zinc, using supersound process 8-15min, the supersonic frequency 16-20kHz, ultrasound
Intensity 1.00kW/cm2-1.15kW/cm2。
7. the preparation method of radiator aluminum alloy according to claim 3, it is characterised in that：In the step (2), institute
It is argon gas to state inert gas, and the pressure of the argon gas is 0.3-0.5MPa, refining time 20-25min, to aluminium in refining process
The dross on liquid surface is purged, and stands aluminium alloy melt after the completion of refining, time of repose 15-20min.
8. the preparation method of radiator aluminum alloy according to claim 3, it is characterised in that：In the step (2), institute
Refining agent is stated to be made of the raw material of following parts by weight：15-20 parts of potassium fluoroaluminate, 5-7 parts of attapulgite, 8-12 parts of calcirm-fluoride, carbon
Sour potassium 12-16 parts, 5-8 parts of barium sulfate, 4-6 parts of magnesium nitride, 6-10 parts of carbon trichloride, 2-4 parts of anhydrous Aluminum chloride, activated carbon 2-3
Part.
9. the preparation method of radiator aluminum alloy according to claim 3, it is characterised in that：In the step (3), adopt
With the online degasification method degasification of two level, the online degasification of the first order is using argon gas and chlorine mixed gas degasification, mixed gas flow
For 2-3m3/ t aluminum melts, the wherein flow-rate ratio of argon gas and chlorine are 1:0.03-0.05；The online degasification in the second level is removed using argon gas
Gas, argon flow amount 2-3m3/ t aluminum melts.
10. the preparation method of radiator aluminum alloy according to claim 3, it is characterised in that：In the step (5),
Aluminum melt after cast is cooled to room temperature with 120-140 DEG C/h rates, places 22-26h；It is heated up again with the rate of 80-90 DEG C/h
To 300-320 DEG C, 2-3h is kept the temperature；Then it is warming up to 450-480 DEG C with the rate of 100-120 DEG C/h, keeps the temperature 2-3h；Again with 40-
The rate of 50 DEG C/h is cooled to 160-200 DEG C, keeps the temperature 2-3h；It is cooled to room temperature again with the rate of 60-80 DEG C/h, is finally putting into liquid
90-120min is handled in nitrogen, is taken out.
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