CN110218917A - A kind of alloy aluminium bar and its preparation process containing rare earth element - Google Patents
A kind of alloy aluminium bar and its preparation process containing rare earth element Download PDFInfo
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- CN110218917A CN110218917A CN201910510498.9A CN201910510498A CN110218917A CN 110218917 A CN110218917 A CN 110218917A CN 201910510498 A CN201910510498 A CN 201910510498A CN 110218917 A CN110218917 A CN 110218917A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
Abstract
The invention discloses a kind of alloy aluminium bar and its preparation process containing rare earth element, belongs to field of aluminium alloy material preparation.The alloy aluminium bar includes following components in percentage by weight: Mg1.5-3.3%, Si0.7-1.1%, Cu1.0-1.7%, Fe0.04-0.1%, Mn0.35-0.7%, Ni0.2-0.6%, Ti0.07-0.12%, Y0.15-0.3%, Er0.07-0.1%, Gd0.05-0.11%, La0.07-0.24%, other metals and nonmetallic impurity element total amount are no more than 0.5%, and surplus is aluminium.The alloy aluminium bar is prepared by fusing-alloying-refining-ingot casting-Homogenization Treatments-extrusion forming.By adding rare earth element, dendrite net born of the same parents tissue can be refined, and the iron of acicular texture in molten aluminum is made to be changed into graininess, improve corrosion resistance, the mechanical performance of aluminium bar, reduce the surface roughness of the Al-alloy parts of its preparation.Alloy aluminium bar intensity produced by the present invention is high, and plasticity is high, excellent corrosion resistance, no Peeling Corrosion, stress corrosion and the tendency of intercrystalline corrosion, processing and good welding performance, suitable for the manufacture of auto parts, has excellent industrial application value.
Description
Technical field
The present invention relates to field of aluminium alloy material preparation, more particularly to a kind of alloy aluminium bar and its system containing rare earth element
Standby technique.
Background technique
Aluminium alloy with cost performance height, the Beauty, plasticity is good, specific strength is high, good corrosion resistance, strong processability the advantages that, quilt
It is widely used in the multiple fields such as automobile, machinery, aerospace.Aluminium bar is the very big a kind of intermediate production of usage amount in aluminium alloy
Product in conventional preparation techniques, are easy to produce some defects in fusion process, such as slag inclusion, stomata etc..These defects are easy
Cause alloy aluminium bar to occur tensile strength in the extrusion process in later period in the decline of anti-plasticity, the fabricated product enabled aluminum alloy to because
It cracks, squeeze dark line, graininess burr etc. and become waste product, to reduce the yield rate of aluminum profile.
Therefore, addition element and the preparation process for improving aluminium alloy in aluminium alloy are to improve aluminium alloy quality relatively to have
The method of effect.The component of aluminium alloy and the parameter of preparation process, mechanical property and surface effect to aluminium alloy have crucial
It influences, so the component of selection aluminium alloy and the parameter of preparation process are the processes of a worth long felt.
Summary of the invention
It is an object of that present invention to provide a kind of alloy aluminium bar and its preparation process containing rare earth element, to solve the prior art
The not high technical problem of the tensile property of existing alloy aluminium bar, elongation percentage.
For this purpose, the present invention proposes following scheme:
A kind of alloy aluminium bar containing rare earth element, the alloy aluminium bar includes following components in percentage by weight: Mg1.5-
3.3%, Si0.7-1.1%, Cu1.0-1.7%, Fe0.04-0.1%, Mn0.35-0.7%, Ni0.2-0.6%, Ti0.07-
0.12%, Y0.15-0.3%, Er0.07-0.1%, Gd0.05-0.11%, La0.07-0.24%, other metals and nonmetallic
Impurity element total amount be no more than 0.5%, surplus is aluminium.
Preferably, the alloy aluminium bar includes following components in percentage by weight: Mg2.6%, Si0.9%, Cu1.3%,
Fe0.7%, Mn0.5%, Ni0.42%, Ti0.1%, Y0.22%, Er0.08%, Gd0.087%, La0.16%, other metals
And nonmetallic impurity element total amount is no more than 0.5%, surplus is aluminium.
Preferably, aluminium used is fine aluminium, purity 99.8%.
A kind of alloy aluminium bar preparation process containing rare earth element, comprising the following steps:
Fusing: it is melted being warming up to 710-735 DEG C in aluminium ingot addition smelting furnace；
Alloying: Mg, Si, Cu, Fe, Mn, Ni, Ti element are added in smelting furnace, are heated to 750-790 DEG C, and keep the temperature
30min stirs with graphite rod and shakes molten metal, and the gas in molten metal is discharged, the slag of aluminum alloy melt surface is removed.
Refining: temperature is adjusted to 680-705 DEG C, Y, Er, Gd, La element is added, is passed through argon gas and carries out refining agent, removes
The injection refining of slag agent, pressure control claw the surface slag of molten aluminium alloy in 0.5-1.5Mpa, refining time 60min,
Refining is completed to stand 25min；
Ingot casting: when temperature is 680-715 DEG C, fining agent is added and carries out crystal grain refinement processing；Then it will refine resulting
Aluminium alloy melt passes through filtering and removing slag twice；By temperature control ingot casting at 700-710 DEG C.
Homogenization Treatments: being heated to 380-440 DEG C for alloy aluminium ingot casting, keeps the temperature 7-11h, then air-cooled to 50 DEG C or less；
Extrusion forming: extrusion die is heated to 450 DEG C, aluminium alloy cast ingot is heated to entering extrusion cylinder at 500-520 DEG C
It is squeezed, extrusion speed is set as 0.3-0.8mm/s, squeezes and completes to obtain final alloy aluminium bar.
Preferably, it is kept the temperature after temperature being heated to 778 DEG C in alloying.
Preferably, the quality that refining agent is added in refining is the 0.15-0.33% of aluminium alloy melt quality, and deslagging agent is added
Quality be aluminium alloy melt quality 0.2%.
Preferably, in refining by pressure control in 0.11Mpa.
Preferably, pass through filtering and removing slag twice described in ingot casting are as follows: after removing the gred by glass fiber filter cloth, then pass through
The foamed ceramic filter plate of 40ppi removes the gred.
Preferably, in Homogenization Treatments, alloy aluminium ingot casting is heated to 417 DEG C, keeps the temperature 9h.
Preferably, in extrusion forming, extrusion speed is set as 0.6mm/s.
The beneficial effect of the present invention compared with the prior art includes:
1. as shown in Table 1, embodiment 2 is optimum embodiment, the data of embodiment 1-3 are better than the data of comparative example 1-5.It is right
Ratio 5 is to be not added with tetra- kinds of elements of Y, Er, Gd, La, and performance is also declined.Embodiment 1-3 and comparative example 5 are carried out pair
Than；In terms of tensile strength, embodiment 1-3 improves 19.3%, 20.9%, 18.9% than comparative example 5 respectively；In yield strength
Aspect, embodiment 1-3 improve 36.5%, 39.5%, 34.6% than comparative example 5 respectively；In terms of elongation percentage, embodiment 1-3
28.6%, 32.9%, 21.7% is improved than comparative example 5 respectively.It can see from the rate of being correspondingly improved, alloy aluminium bar of the present invention
Formula and its preparation process can effectively improve gained alloy aluminium bar tensile strength, yield strength and elongation percentage.And it compares
The performance of example 1-5 alloy aluminium bar is below the performance of embodiment 1-3 alloy aluminium bar, also illustrates Y, Er, Gd, La element of addition
Play the role of improving the comprehensive performance of alloy aluminium bar.
2. addition rare earth element in, the aluminum alloy organization for adding Y is finer and closely woven, can be improved aluminium alloy inoxidizability and
Ductility, high-temperature corrosion resistance performance are greatly improved, and after adding Y, aluminum alloy surface can form the protectiveness of continuous densification
Oxidation film can hinder the diffusion of oxygen, sulphur to immerse, and the corrosion resistance enabled aluminum alloy to gets a promotion.The addition of Er can formed
Al3Er, can significant refining alloy as-cast grain, can inhibit to recrystallize to a certain extent, alloy thermal stability be improved, with this
The tensile strength and hardness of the alloy under different heat treatment state can be improved simultaneously, Er can refine dendrite net born of the same parents tissue, mention
High recrystallization temperature.Gd element refines aluminium alloy crystal of the present invention more, effectively increases the mechanical performance of aluminium alloy；La
Element can enable aluminum alloy to molten hydrogen amount in melt and reduce, and the needle pore defect of resulting casting improves significantly, and it is molten to reduce aluminium alloy
The Precipitating pressure of hydrogen in liquid.The data of the tensile strength of embodiment 2 and comparative example 1-5 and yield strength are compared respectively,
It can be found that tetra- kinds of elements of Y, Er, Gd, La produce synergistic effect.In tensile strength test, embodiment 2 is mentioned than comparative example 1
High 13.6 (433.8-420.2=13.6)；Embodiment 2 improves 22.4 (433.8-411.4=22.4) than comparative example 2；It is real
It applies example 2 and improves 15.1 (433.8-418.7=15.1) than comparative example 3；Embodiment 2 improves 11.7 (433.8- than comparative example 4
422.1=11.7)；Embodiment 2 improves 74.9 (433.8-358.9=74.9) than comparative example 5；Wherein the number of embodiment 2
Being added summation according to the data that comparative example 1-4 is individually subtracted is 62.8 (13.6+22.4+15.1+11.7=62.8), this numerical value is small
74.9 (62.8 < 74.9) reduced in the case that embodiment 2 is relative to the comparative example 5 for not adding Gd, Y, Er, Ce element；With
Every group of the numerical value of comparative example 1-4 is individually subtracted as Effect value in embodiment 2, and Y, Er, Gd, La element make in the combination of alloy aluminium bar
Effect value ratio Y, Er, Gd, La element uses individually the sum of Effect value increase rate α=(74.9- in alloy aluminium bar
62.8) 62.8 × 100%=19.27% of ÷, that is, the Effect value of tensile strength improves 19.27% in the case where being applied in combination.
In yield strength test, embodiment 2 improves 14.9 (264.7-249.8=14.9) than comparative example 1；Embodiment 2 is than comparison
Example 2 improves 18.5 (264.7-246.2=18.5)；Embodiment 2 improves 14.6 (264.7-250.1=than comparative example 3
14.6)；Embodiment 2 improves 16.2 (264.7-248.5=16.2) than comparative example 4；Embodiment 2 improves 75 than comparative example 5
(164.7-189.7=75)；It is 64.2 that the data that comparative example 1-4 is individually subtracted in the data of embodiment 2, which are wherein added summation,
(14.9+18.5+14.6+16.2=64.2), this numerical value are less than embodiment 2 relative to pair for not adding Gd, Y, Er, Ce element
75 (64.2 < 75) reduced in the case where ratio 5；Every group of the numerical value of comparative example 1-4 is individually subtracted as effect using embodiment 2
Value, Y, Er, Gd, La element are single respectively in alloy aluminium bar in Effect value ratio Y, Er, Gd, La element that alloy aluminium bar is applied in combination
The sum of only using effect value increase rate α=(75-64.2) 64.2 × 100%=16.82% of ÷, that is, bend in the case where being applied in combination
The Effect value for taking intensity improves 16.82%.Illustrate that Y, Er, Gd, La element generate corresponding synergistic effect, alloy aluminium bar it is comprehensive
Performance is closed, each component is indispensable.
3. alloy aluminium bar intensity produced by the present invention is high, plasticity is high, excellent corrosion resistance, and no Peeling Corrosion, stress are rotten
The tendency of erosion and intercrystalline corrosion, processing and good welding performance have excellent industrial application valence suitable for the manufacture of auto parts
Value.
Specific embodiment
Invention is further described in detail With reference to embodiment.It is emphasized that following the description is only
It is merely exemplary, the range and its application being not intended to be limiting of the invention.
Embodiment 1
A kind of alloy aluminium bar containing rare earth element, the alloy aluminium bar includes following components in percentage by weight:
Mg1.5%, Si0.7%, Cu1.0%, Fe0.04%, Mn0.35%, Ni0.2%, Ti0.07%, Y0.15%, Er0.07%,
Gd0.05%, La0.07%, other metals and nonmetallic impurity element total amount are no more than 0.5%, and surplus is aluminium.
Aluminium used is fine aluminium, purity 99.8%.
A kind of alloy aluminium bar preparation process containing rare earth element, comprising the following steps:
Fusing: it is melted being warming up to 710 DEG C in aluminium ingot addition smelting furnace；
Alloying: Mg, Si, Cu, Fe, Mn, Ni, Ti element are added in smelting furnace, are heated to 750 DEG C, and keep the temperature
30min stirs with graphite rod and shakes molten metal, and the gas in molten metal is discharged, the slag of aluminum alloy melt surface is removed.
Refining: temperature is adjusted to 680 DEG C, Y, Er, Gd, La element is added, is passed through argon gas and carries out refining agent, deslagging agent
Injection refining, be added refining agent quality be aluminium alloy melt quality 0.15%, be added deslagging agent quality be aluminium alloy
The 0.2% of melt quality, pressure control claw the surface slag of molten aluminium alloy in 0.5Mpa, refining time 60min, essence
Refining is completed to stand 25min；
Ingot casting: when temperature is 680 DEG C, fining agent is added and carries out crystal grain refinement processing；Then resulting aluminium will be refined to close
After golden melt is removed the gred by glass fiber filter cloth, then the foamed ceramic filter plate slagging-off for passing through 40ppi；Temperature control is existed
Ingot casting at 700 DEG C.
Homogenization Treatments: being heated to 380 DEG C for alloy aluminium ingot casting, keeps the temperature 7h, then air-cooled to 50 DEG C or less；
Extrusion forming: extrusion die is heated to 450 DEG C, aluminium alloy cast ingot is heated to entering extrusion cylinder progress at 500 DEG C
It squeezes, extrusion speed is set as 0.3mm/s, squeezes and completes to obtain final alloy aluminium bar.
Embodiment 2
A kind of alloy aluminium bar containing rare earth element, the alloy aluminium bar includes following components in percentage by weight:
Mg2.6%, Si0.9%, Cu1.3%, Fe0.7%, Mn0.5%, Ni0.42%, Ti0.1%, Y0.22%, Er0.08%,
Gd0.087%, La0.16%, other metals and nonmetallic impurity element total amount are no more than 0.5%, and surplus is aluminium.
Aluminium used is fine aluminium, purity 99.8%.
A kind of alloy aluminium bar preparation process containing rare earth element, comprising the following steps:
Fusing: it is melted being warming up to 720 DEG C in aluminium ingot addition smelting furnace；
Alloying: Mg, Si, Cu, Fe, Mn, Ni, Ti element are added in smelting furnace, are heated to 778 DEG C, and keep the temperature
30min stirs with graphite rod and shakes molten metal, and the gas in molten metal is discharged, the slag of aluminum alloy melt surface is removed.
Refining: temperature is adjusted to 693 DEG C, Y, Er, Gd, La element is added, is passed through argon gas and carries out refining agent, deslagging agent
Injection refining, be added refining agent quality be aluminium alloy melt quality 0.24%, be added deslagging agent quality be aluminium alloy
The 0.2% of melt quality, pressure control claw the surface slag of molten aluminium alloy in 0.11Mpa, refining time 60min, essence
Refining is completed to stand 25min；
Ingot casting: when temperature is 695 DEG C, fining agent is added and carries out crystal grain refinement processing；Then resulting aluminium will be refined to close
After golden melt is removed the gred by glass fiber filter cloth, then the foamed ceramic filter plate slagging-off for passing through 40ppi；Temperature control is existed
Ingot casting at 704 DEG C.
Homogenization Treatments: being heated to 417 DEG C for alloy aluminium ingot casting, keeps the temperature 9h, then air-cooled to 50 DEG C or less；
Extrusion forming: extrusion die is heated to 450 DEG C, aluminium alloy cast ingot is heated to entering extrusion cylinder at 500-520 DEG C
It is squeezed, extrusion speed is set as 0.6mm/s, squeezes and completes to obtain final alloy aluminium bar.
Embodiment 3
A kind of alloy aluminium bar containing rare earth element, the alloy aluminium bar includes following components in percentage by weight:
Mg3.3%, Si1.1%, Cu1.7%, Fe0.1%, Mn1.5%, Ni0.6%, Ti0.12%, Y0.3%, Er0.1%,
Gd0.11%, La0.24%, other metals and nonmetallic impurity element total amount are no more than 0.5%, and surplus is aluminium.
Aluminium used is fine aluminium, purity 99.8%.
A kind of alloy aluminium bar preparation process containing rare earth element, comprising the following steps:
Fusing: it is melted being warming up to 735 DEG C in aluminium ingot addition smelting furnace；
Alloying: Mg, Si, Cu, Fe, Mn, Ni, Ti element are added in smelting furnace, are heated to 790 DEG C, and keep the temperature
30min stirs with graphite rod and shakes molten metal, and the gas in molten metal is discharged, the slag of aluminum alloy melt surface is removed.
Refining: temperature is adjusted to 705 DEG C, Y, Er, Gd, La element is added, is passed through argon gas and carries out refining agent, deslagging agent
Injection refining, pressure control claws the surface slag of molten aluminium alloy in 1.5Mpa, refining time 60min, and refining is completed
Stand 25min；
Ingot casting: when temperature is 715 DEG C, fining agent is added and carries out crystal grain refinement processing；Then resulting aluminium will be refined to close
After golden melt is removed the gred by glass fiber filter cloth, then the foamed ceramic filter plate slagging-off for passing through 40ppi；Temperature control is existed
Ingot casting at 710 DEG C.
Homogenization Treatments: being heated to 440 DEG C for alloy aluminium ingot casting, keeps the temperature 11h, then air-cooled to 50 DEG C or less；
Extrusion forming: extrusion die is heated to 450 DEG C, aluminium alloy cast ingot is heated to entering extrusion cylinder progress at 520 DEG C
It squeezes, extrusion speed is set as 0.8mm/s, squeezes and completes to obtain final alloy aluminium bar.
Comparative example 1
The component and each component percentage, processing step of alloy aluminium bar are substantially the same manner as Example 2, have only the difference is that group
Y element is not added in point.
Comparative example 2
The component and each component percentage, processing step of alloy aluminium bar are substantially the same manner as Example 2, have only the difference is that group
Er element is not added in point.
Comparative example 3
The component and each component percentage, processing step of alloy aluminium bar are substantially the same manner as Example 2, have only the difference is that group
Gd element is not added in point.
Comparative example 4
The component and each component percentage, processing step of alloy aluminium bar are substantially the same manner as Example 2, have only the difference is that group
La element is not added in point.
Comparative example 5
The component and each component percentage, processing step of alloy aluminium bar are substantially the same manner as Example 2, have only the difference is that group
Y, Er, Gd, La element are not added in point.
Alloy aluminium bar obtained by embodiment 1-3, comparative example 1-5 is prepared into the alloy aluminium bar of Φ 30mm, according to GB/
T3191-1998 is tested, and acquired results are as shown in table 1.
The test result of alloy aluminium bar made from 1 embodiment 1-3 of table, comparative example 1-5
| Group | Tensile strength (MPa) | Yield strength (MPa) | Elongation percentage (%) |
| Embodiment 1 | 428.1 | 259.0 | 20.7 |
| Embodiment 2 | 433.8 | 264.7 | 21.4 |
| Embodiment 3 | 426.7 | 255.3 | 19.6 |
| Comparative example 1 | 420.2 | 249.8 | 18.1 |
| Comparative example 2 | 411.4 | 246.2 | 17.4 |
| Comparative example 3 | 418.7 | 250.1 | 18.2 |
| Comparative example 4 | 422.1 | 248.5 | 17.6 |
| Comparative example 5 | 358.9 | 189.7 | 16.1 |
As shown in Table 1, embodiment 2 is optimum embodiment, and the data of embodiment 1-3 are better than the data of comparative example 1-5.Comparison
Example 5 is to be not added with tetra- kinds of elements of Y, Er, Gd, La, and performance is also declined.Embodiment 1-3 and comparative example 5 are compared；
In terms of tensile strength, embodiment 1-3 improves 19.3%, 20.9%, 18.9% than comparative example 5 respectively；In yield strength side
Face, embodiment 1-3 improve 36.5%, 39.5%, 34.6% than comparative example 5 respectively；In terms of elongation percentage, embodiment 1-3 points
28.6%, 32.9%, 21.7% is not improved than comparative example 5.It can see from the rate of being correspondingly improved, alloy aluminium bar of the present invention
Formula and its preparation process can effectively improve tensile strength, yield strength and the elongation percentage of gained alloy aluminium bar.And comparative example
The performance of 1-5 alloy aluminium bar is below the performance of embodiment 1-3 alloy aluminium bar, also illustrates that Y, Er, Gd, La element of addition rise
The effect for improving the comprehensive performance of alloy aluminium bar is arrived.
In the element of addition rare earth, the aluminum alloy organization for adding Y is finer and closely woven, and the inoxidizability of aluminium alloy can be improved and prolong
Malleability, high-temperature corrosion resistance performance are greatly improved, and after adding Y, aluminum alloy surface can form the protectiveness oxygen of continuous densification
Change film, the diffusion of oxygen, sulphur can be hindered to immerse, the corrosion resistance enabled aluminum alloy to gets a promotion.The addition of Er can formed
Al3Er, can significant refining alloy as-cast grain, can inhibit to recrystallize to a certain extent, alloy thermal stability be improved, with this
The tensile strength and hardness of the alloy under different heat treatment state can be improved simultaneously, Er can refine dendrite net born of the same parents tissue, mention
High recrystallization temperature.Gd element refines aluminium alloy crystal of the present invention more, effectively increases the mechanical performance of aluminium alloy；La
Element can enable aluminum alloy to molten hydrogen amount in melt and reduce, and the needle pore defect of resulting casting improves significantly, and it is molten to reduce aluminium alloy
The Precipitating pressure of hydrogen in liquid.The data of the tensile strength of embodiment 2 and comparative example 1-5 and yield strength are compared respectively,
It can be found that tetra- kinds of elements of Y, Er, Gd, La produce synergistic effect.In tensile strength test, embodiment 2 is mentioned than comparative example 1
High 13.6 (433.8-420.2=13.6)；Embodiment 2 improves 22.4 (433.8-411.4=22.4) than comparative example 2；It is real
It applies example 2 and improves 15.1 (433.8-418.7=15.1) than comparative example 3；Embodiment 2 improves 11.7 (433.8- than comparative example 4
422.1=11.7)；Embodiment 2 improves 74.9 (433.8-358.9=74.9) than comparative example 5；Wherein the number of embodiment 2
Being added summation according to the data that comparative example 1-4 is individually subtracted is 62.8 (13.6+22.4+15.1+11.7=62.8), this numerical value is small
74.9 (62.8 < 74.9) reduced in the case that embodiment 2 is relative to the comparative example 5 for not adding Gd, Y, Er, Ce element；With
Every group of the numerical value of comparative example 1-4 is individually subtracted as Effect value in embodiment 2, and Y, Er, Gd, La element make in the combination of alloy aluminium bar
Effect value ratio Y, Er, Gd, La element uses individually the sum of Effect value increase rate α=(74.9- in alloy aluminium bar
62.8) 62.8 × 100%=19.27% of ÷, that is, the Effect value of tensile strength improves 19.27% in the case where being applied in combination.
In yield strength test, embodiment 2 improves 14.9 (264.7-249.8=14.9) than comparative example 1；Embodiment 2 is than comparison
Example 2 improves 18.5 (264.7-246.2=18.5)；Embodiment 2 improves 14.6 (264.7-250.1=than comparative example 3
14.6)；Embodiment 2 improves 16.2 (264.7-248.5=16.2) than comparative example 4；Embodiment 2 improves 75 than comparative example 5
(164.7-189.7=75)；It is 64.2 that the data that comparative example 1-4 is individually subtracted in the data of embodiment 2, which are wherein added summation,
(14.9+18.5+14.6+16.2=64.2), this numerical value are less than embodiment 2 relative to pair for not adding Gd, Y, Er, Ce element
75 (64.2 < 75) reduced in the case where ratio 5；Every group of the numerical value of comparative example 1-4 is individually subtracted as effect using embodiment 2
Value, Y, Er, Gd, La element are single respectively in alloy aluminium bar in Effect value ratio Y, Er, Gd, La element that alloy aluminium bar is applied in combination
The sum of only using effect value increase rate α=(75-64.2) 64.2 × 100%=16.82% of ÷, that is, bend in the case where being applied in combination
The Effect value for taking intensity improves 16.82%.Illustrate that Y, Er, Gd, La element generate corresponding synergistic effect, alloy aluminium bar it is comprehensive
Performance is closed, each component is indispensable.
The above content is combine it is specific/further detailed description of the invention for preferred embodiment, cannot
Assert that specific implementation of the invention is only limited to these instructions.General technical staff of the technical field of the invention is come
It says, without departing from the inventive concept of the premise, some replacements or modifications can also be made to the embodiment that these have been described,
And these substitutions or variant all shall be regarded as belonging to protection scope of the present invention.
Claims (10)
1. a kind of alloy aluminium bar containing rare earth element, which is characterized in that the alloy aluminium bar includes the group of following weight percent
Point: Mg1.5-3.3%, Si0.7-1.1%, Cu1.0-1.7%, Fe0.04-0.1%, Mn0.35-0.7%, Ni0.2-0.6%,
Ti0.07-0.12%, Y0.15-0.3%, Er0.07-0.1%, Gd0.05-0.11%, La0.07-0.24%, other metals and
Nonmetallic impurity element total amount is no more than 0.5%, and surplus is aluminium.
2. the alloy aluminium bar containing rare earth element as described in claim 1, which is characterized in that the alloy aluminium bar includes following heavy
Measure percentage component: Mg2.6%, Si0.9%, Cu1.3%, Fe0.7%, Mn0.5%, Ni0.42%, Ti0.1%,
Y0.22%, Er0.08%, Gd0.087%, La0.16%, other metals and nonmetallic impurity element total amount are no more than
0.5%, surplus is aluminium.
3. the alloy aluminium bar containing rare earth element as claimed in claim 1 or 2, which is characterized in that aluminium used is fine aluminium, purity
It is 99.8%.
4. a kind of alloy aluminium bar preparation process as described in any one of claims 1-3 containing rare earth element, which is characterized in that packet
Include following steps:
Fusing: it is melted being warming up to 710-735 DEG C in aluminium ingot addition smelting furnace；
Alloying: Mg, Si, Cu, Fe, Mn, Ni, Ti element are added in smelting furnace, are heated to 750-790 DEG C, and keep the temperature
30min stirs with graphite rod and shakes molten metal, and the gas in molten metal is discharged, the slag of aluminum alloy melt surface is removed.
Refining: temperature is adjusted to 680-705 DEG C, Y, Er, Gd, La element is added, is passed through argon gas and carries out refining agent, deslagging agent
Injection refining, pressure control claws the surface slag of molten aluminium alloy in 0.5-1.5Mpa, refining time 60min, refines
It completes to stand 25min；
Ingot casting: when temperature is 680-715 DEG C, fining agent is added and carries out crystal grain refinement processing；Then resulting aluminium will be refined to close
Golden melt passes through filtering and removing slag twice；By temperature control ingot casting at 700-710 DEG C.
Homogenization Treatments: being heated to 380-440 DEG C for alloy aluminium ingot casting, keeps the temperature 7-11h, then air-cooled to 50 DEG C or less；
Extrusion forming: extrusion die is heated to 450 DEG C, aluminium alloy cast ingot is heated to entering extrusion cylinder progress at 500-520 DEG C
It squeezes, extrusion speed is set as 0.3-0.8mm/s, squeezes and completes to obtain final alloy aluminium bar.
5. the alloy aluminium bar preparation process containing rare earth element as claimed in claim 4, which is characterized in that by temperature in alloying
It is kept the temperature after being heated to 778 DEG C.
6. the alloy aluminium bar preparation process containing rare earth element as claimed in claim 4, which is characterized in that refining is added in refining
The quality of agent is the 0.15-0.33% of aluminium alloy melt quality, and the quality that deslagging agent is added is aluminium alloy melt quality
0.2%.
7. the alloy aluminium bar preparation process containing rare earth element as claimed in claim 4, which is characterized in that by air pressure control in refining
System is in 0.11Mpa.
8. the alloy aluminium bar preparation process containing rare earth element as claimed in claim 4, which is characterized in that lead to described in ingot casting
After filtering and removing slag twice are as follows: after being removed the gred by glass fiber filter cloth, then the foamed ceramic filter plate slagging-off for passing through 40ppi.
9. the alloy aluminium bar preparation process containing rare earth element as claimed in claim 4, which is characterized in that in Homogenization Treatments
In, alloy aluminium ingot casting is heated to 417 DEG C, keeps the temperature 9h.
10. the alloy aluminium bar preparation process containing rare earth element as claimed in claim 4, which is characterized in that in extrusion forming,
Extrusion speed is set as 0.6mm/s.
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