CN107630173A - A kind of high-strength aluminum alloy processing technology - Google Patents
A kind of high-strength aluminum alloy processing technology Download PDFInfo
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- CN107630173A CN107630173A CN201710869887.1A CN201710869887A CN107630173A CN 107630173 A CN107630173 A CN 107630173A CN 201710869887 A CN201710869887 A CN 201710869887A CN 107630173 A CN107630173 A CN 107630173A
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Abstract
The invention discloses a kind of high-strength aluminum alloy processing technology, using silicon, pure magnesium, pure vanadium, fine aluminium, iron as raw material, by the direct quenching of die casting, precipitation of the silicon in process of setting in aluminium alloy is controlled, so as to improve the pattern of silicon in die casting, improve the mechanical property of die casting.The present invention, by adding quantitative magnesium, vanadium, ferro element, becomes the addition of aluminium alloy, especially ferro element with high intensity, high rigidity, serves the effect of crystal grain thinning, the intensity of alloy is greatly improved using two kinds of elements of sial as alloy bulk.
Description
Technical field
Invention is related to a kind of high-strength aluminum alloy processing technology, belongs to inorganic metallic materials field.
Background technology
Aluminium alloy has preferable electric conductivity because its intensity is high, in light weight, be widely used in Aero-Space,
The technical fields such as automobile making turn into the optimal material of automotive light weight technology.Because aluminium alloy vehicle outer body panel mouldability,
Dent resistance, baking hardenability japanning after and thus obtained high mechanical strength, so as to manufacture have more Thin Specs and
Sheet material lighter while that there is grade surface smoothness.Intensity, the mouldability of alloy can significantly be prompted by improving content in aluminium alloy
Energy and corrosion resistance, but delayed yield and Le Desi lines be present, easily there is the shortcomings that " pebbling ".And existing it can expire simultaneously
Sufficient aluminum alloy plate materials hemming performance and the aluminium alloy processing technology of surface painting brush two aspect performance requirements of linear energy are complicated, and raw material
It is required that more harsh, cost is higher.
The content of the invention
It is an object of the invention to provide a kind of high-strength aluminum alloy processing technology, and the present invention is mainly with two kinds of members of sial
Element is alloy bulk, by adding a certain amount of magnesium, iron, iron and carrying out heat treatment, is prepared with higher-strength
Aluminium alloy and preparation method.
High-strength aluminum alloy processing technology, it is characterised in that this method comprises the following steps：
Step 1, take 23.6 parts of technical grade pure silicon, 9.2 parts of pure magnesium, 2.8 parts of pure vanadium, 48.0 parts of fine aluminium, 0.4 part of iron, be placed in it is non-from
Consumption is true
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Step 2, taken out after melted alloy cast ingot is cooled down into 10 minutes in smelting furnace；
Step 3, Muffle furnace is warming up to 1000 DEG C, is put into alloy cast ingot and is incubated 30 minutes, ensure ingot casting whole heat penetration, stir aluminium
Alloy liquid, stirring should be carried out steadily, stress not play too big wave, to prevent in oxide entrapment melt, stirring 3 hours,
Liquid is enabled aluminum alloy to sufficiently to mix；
Step 4, stirring are stood after terminating, and time of standing is 20min, and after standing, the slag thing in aluminum alloy melt body can be isolated
Come, and polymerize blocking, take out ingot casting from Muffle furnace, multi- pass rolling deformation is carried out on fast transfer to two roll surface milling trains；
Placed into after the completion of step 5, rolling for the first time in Muffle furnace and be incubated 3 minutes, taking-up is quickly rolled in the same direction for the second time again
System, is circulated according to this, and the control of each volume under pressure finally makes alloy pig deflection reach 70% the 9% of alloy pig original depth；
Step 6, last a time deformation after, sheet alloy is positioned in quenching medium and is cooled to room temperature；
Step 7, the sheet alloy surface that will be cooled to room temperature are stripped off the skin and obtain high-strength aluminum alloy with figuring of surface.
Described aluminum alloy quenching agent preparation method is as follows
Step 1,0.8 part of stearic acid, 18 parts of cornstarch, 14 portions of palm fibres are put oil and are dissolved in 10 parts of polyethers first, mixed
Liquid, it is subsequently added into the water of 3 times of mixeding liquid volume and is transferred in reactor, reaction condition is 150 DEG C, 800r/min, 3MPa, instead
Be 2h between seasonable, after reaction terminates, temperature is down to 80 DEG C, adds 4 parts of laurates and 3 parts of butyl acetates, quiet after stirring 10min
Put；
Step 2, then centrifuged, centrifugal rotational speed 12000r/min, centrifugation time 10min, take supernatant after centrifugation, add
Add 9 parts of sodium benzoates, 3 parts of arsenic butters, 8 parts of D-Asps and 10 parts of polyethylene glycol, after stirring, temperature rises to 63
DEG C, 1h is incubated, room temperature is finally cooled to, paraffin oil seal, produces.
Beneficial effect：High-strength aluminum alloy prepared by the present invention, it is former from aluminum alloy solidification principle, extrusion process and heat treatment
Reason is set out, and by the direct quenching of die casting, precipitation of the silicon in process of setting in aluminium alloy is controlled, so as to improve in die casting
The pattern of silicon, improves the mechanical property of die casting, while alloying element M parts, V and Fe in alloy is solid-solution in matrix and is formed
Supersaturated solid solution, improve mechanical property；Modification Si-Na-LTA nano materials of addition have excellent Space expanding,
So that metal crystalline phase interface fusion is even closer, while carries out process annealing processing using compounding quenching medium, eliminate workpiece and quench
Thermal stress after burning hot processing, improves its yield strength.The present invention directly utilizes the facility of existing extrusion process, to die casting Al mono-
The M parts line aluminium alloys of Si mono- carry out Strengthening and Toughening, have not only saved the energy but also have improved its mechanical property, and had expanded the application of aluminum alloy die casting
Scope.It can be rated as with novelty, creativeness, the good technology of practicality.
Embodiment
Embodiment 1
High-strength aluminum alloy processing technology, comprises the following steps：
Step 1, take 23.6 parts of technical grade pure silicon, 9.2 parts of pure magnesium, 2.8 parts of pure vanadium, 48.0 parts of fine aluminium, 0.4 part of iron, be placed in it is non-from
Consume in vacuum arc melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, the smelting time of each each sample 1 minute,
Obtain the uniform alloy cast ingot of composition；
Step 2, taken out after melted alloy cast ingot is cooled down into 10 minutes in smelting furnace；
Step 3, Muffle furnace is warming up to 1000 DEG C, is put into alloy cast ingot and is incubated 30 minutes, ensure ingot casting whole heat penetration, stir aluminium
Alloy liquid, stirring should be carried out steadily, stress not play too big wave, to prevent in oxide entrapment melt, stirring 3 hours,
Liquid is enabled aluminum alloy to sufficiently to mix；
Step 4, stirring are stood after terminating, and time of standing is 20min, and after standing, the slag thing in aluminum alloy melt body can be isolated
Come, and polymerize blocking, take out ingot casting from Muffle furnace, multi- pass rolling deformation is carried out on fast transfer to two roll surface milling trains；
Placed into after the completion of step 5, rolling for the first time in Muffle furnace and be incubated 3 minutes, taking-up is quickly rolled in the same direction for the second time again
System, is circulated according to this, and the control of each volume under pressure finally makes alloy pig deflection reach 70% the 9% of alloy pig original depth；
Step 6, last a time deformation after, sheet alloy is positioned in quenching medium and is cooled to room temperature；
Step 7, the sheet alloy surface that will be cooled to room temperature are stripped off the skin and obtain high-strength aluminum alloy with figuring of surface.
Described aluminum alloy quenching agent preparation method is as follows
Step 1,0.8 part of stearic acid, 18 parts of cornstarch, 14 portions of palm fibres are put oil and are dissolved in 10 parts of polyethers first, mixed
Liquid, it is subsequently added into the water of 3 times of mixeding liquid volume and is transferred in reactor, reaction condition is 150 DEG C, 800r/min, 3MPa, instead
Be 2h between seasonable, after reaction terminates, temperature is down to 80 DEG C, adds 4 parts of laurates and 3 parts of butyl acetates, quiet after stirring 10min
Put；
Step 2, then centrifuged, centrifugal rotational speed 12000r/min, centrifugation time 10min, take supernatant after centrifugation, add
Add 9 parts of sodium benzoates, 3 parts of arsenic butters, 8 parts of D-Asps and 10 parts of polyethylene glycol, after stirring, temperature rises to 63
DEG C, 1h is incubated, room temperature is finally cooled to, paraffin oil seal, produces.
Embodiment 2
20.6 parts of technical grade pure silicon, 10.2 parts of pure magnesium, 2.8 parts of pure vanadium, 48.0 parts of fine aluminium, 0.4 part of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 3
23.6 parts of technical grade pure silicon, 9.2 parts of pure magnesium, 2.8 parts of pure vanadium, 38.0 parts of fine aluminium, 0.8 part of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 4
25.6 parts of technical grade pure silicon, 11.2 parts of pure magnesium, 2.8 parts of pure vanadium, 40.0 parts of fine aluminium, 0.4 part of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 5
30.6 parts of technical grade pure silicon, 9.2 parts of pure magnesium, 2.8 parts of pure vanadium, 38.0 parts of fine aluminium, 0.6 part of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 6
23.6 parts of technical grade pure silicon, 9.2 parts of pure magnesium, 3.8 parts of pure vanadium, 48.0 parts of fine aluminium, 1.4 parts of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 7
20.6 parts of technical grade pure silicon, 10.2 parts of pure magnesium, 4.8 parts of pure vanadium, 38.0 parts of fine aluminium, 0.1 part of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 8
20.6 parts of technical grade pure silicon, 19.2 parts of pure magnesium, 1.8 parts of pure vanadium, 48.0 parts of fine aluminium, 0.4 part of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 9
13.6 parts of technical grade pure silicon, 0.2 part of pure magnesium, 2.8 parts of pure vanadium, 48.0 parts of fine aluminium, 2.4 parts of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 10
26.6 parts of technical grade pure silicon, 10.2 parts of pure magnesium, 7.8 parts of pure vanadium, 45.0 parts of fine aluminium, 0.4 part of iron are taken, it is true to be placed in non-consumable
In empty arc-melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each the smelting time 1.0 of sample divides every time
Clock, obtain the uniform alloy cast ingot of composition.
Remaining step and embodiment 1 are identical.
Embodiment 11
Compared with Example 1, it is different to be to replace pure silicon, remaining step and formula with modified Si-Na-LTA nano materials
Identical with embodiment 1, modified Si-Na-LTA preparation method of nano material is as follows：
Step 1, take 23.6 parts of modified Si-Na-LTA nano materials, 9.2 parts of pure magnesium, 2.8 parts of pure vanadium, 48.0 parts of fine aluminium, iron
0.4 part, it is placed in non-consumable vacuum arc melting furnace, in vacuum 2.0x10^-2Pa melt backs 9 times, each each sample
Smelting time 1.0 minutes, obtain the uniform alloy cast ingot of composition.
Described modification Si-Na-LTA preparation method of nano material is as follows：
Step 1, by 200 parts of particle diameters be 30nm nano silicon oxide put into the aqueous solution, with 3000rpm stirring at 20 DEG C
After speed mechanical stirring 15min, the aqueous dispersions of nano silicon oxide are obtained；Add into the aqueous dispersions of obtained nano silicon oxide
Enter 15 parts of modifer L monothio salicylic acids, at a temperature of 80 DEG C, stirred under 3000rpm rotating speed, obtain modified nano silicon oxide
Suspension；The suspension of gained is spray-dried, the rotating speed of spray drying is 16000rpm, and the temperature of spray drying is
100 DEG C, obtain organic acidifying nano-silicon；
Step 2, by 300 parts of organic acidifying nano-silicon and 100 parts of Na-LTA zeolite powders, activate, be distributed at 500 DEG C
In 10L ethanol, the mixture of compound and ethanol is transferred in the three-necked flask equipped with 2L ammoniacal liquor after ball milling, by temperature
60 DEG C are increased to, 1h is heated, the 1L then added TEOS, continues stirring 6, the slurries filtration that will be obtained, 3 are washed with ethanol
It is secondary, finally obtain modified Si-Na-LTA nano materials.
Reference examples 1
It is with the difference of embodiment 1：In step 1 prepared by aluminium alloy, in vacuum 2.0x10^-2Pa melt backs 3 times, often
The smelting time of secondary each sample 1.0 minutes, remaining step is identical with embodiment 1.
Reference examples 2
It is with the difference of embodiment 1：In step 1 prepared by aluminium alloy, in vacuum 2.0x10^-2Pa melt backs 6 times, often
The smelting time of secondary each sample 1.0 minutes, remaining step is identical with embodiment 1.
Reference examples 3
It is with the difference of embodiment 1：In step 3 prepared by aluminium alloy, Muffle furnace is warming up to 600 DEG C, is put into alloy cast ingot
Insulation 40 minutes, guarantee ingot casting whole heat penetration, remaining step are identical with embodiment 1.
Reference examples 4
It is with the difference of embodiment 1：In step 3 prepared by aluminium alloy, Muffle furnace is warming up to 1400 DEG C, is put into alloy cast ingot
Insulation 20 minutes, guarantee ingot casting whole heat penetration, remaining step are identical with embodiment 1.
Reference examples 5
It is with the difference of embodiment 1：In step 5 prepared by aluminium alloy, each volume under pressure control is in alloy pig original depth
6%, alloy pig deflection is reached 60%, remaining step is identical with embodiment 1.
Reference examples 6
It is with the difference of embodiment 1：In step 5 prepared by aluminium alloy, each volume under pressure control is in alloy pig original depth
12%, alloy pig deflection is reached 80%, remaining step is identical with embodiment 1.
Reference examples 7
It is with the difference of embodiment 1：In aluminum alloy quenching agent preparation process 1, by 1.0 parts of stearic acid, 8 parts of cornstarch, 14
Part palm fibre puts oil and is dissolved in 10 parts of polyethers, obtains mixed liquor, is subsequently added into the water of 3 times of mixeding liquid volume and is transferred to reactor
In,
Remaining step is identical with embodiment 1.
Reference examples 8
It is with the difference of embodiment 1：In aluminum alloy quenching agent preparation process 1, by 3.5 parts of stearic acid, 12 parts of cornstarch, 7
Part palm fibre puts oil and is dissolved in 10 parts of polyethers, obtains mixed liquor, is subsequently added into the water of 3 times of mixeding liquid volume and is transferred to reactor
In, remaining step is identical with embodiment 1.
Reference examples 9
It is with the difference of embodiment 1：In aluminum alloy quenching agent preparation process 2, addition 4 parts of sodium benzoates, 12 parts of arsenic butters,
4 parts of D-Asps and 10 parts of polyethylene glycol, remaining step are identical with embodiment 1.
Reference examples 10
It is with the difference of embodiment 1：In aluminum alloy quenching agent preparation process 2, addition 10 parts of sodium benzoates, 6 parts of arsenic butters,
1 part of D-Asp and 3 parts of polyethylene glycol, remaining step are identical with embodiment 1.
Alloy after rolling is processed into by standard tensile specimen using cutting on line machine, in instron5982 Mechanics Performance Testings
Its tensile mechanical properties is tested on machine, draw speed is：0.375mm/min, and drawn with extensometer all-the-way tracking measurement sample
Length change during stretching.
Specific experiment data are as follows
Test result indicates that the aluminium alloy that process annealing processing is carried out using compounding quenching medium is used in embodiment 1, in silicon
Ratio with aluminium is 1:2, the proportioning fixation of other metallic elements is that the intensity of alloy is best, and reaches prior art more than 2 times
Yield strength；Embodiment 2 arrives embodiment 6, changes the dosage of each metallic element respectively, has difference to the mechanical strength of aluminium alloy
The influence of degree；It is worth noting that embodiment 11 uses modified Si-Na-LTA nano materials make it that alloy yield strength is notable
Improve, illustrate that modified zeolite nano material has more preferable optimization function to the structure of alloy；Reference examples 1 and reference examples 2 are divided
Jiang Di alloy melting number so that the yield strength of alloy is decreased obviously, and illustrates that melting number influences the melting of alloy very little
Performance；Reference examples 2 and reference examples 3 change temperature rise and the soaking time of Muffle furnace, and the intensity of alloy is not still high, illustrate that temperature rise walks
The melting of rapid alloy is most important；Reference examples 5 and reference examples 6 change alloy pig rolling original depth and final deformation quantity, effect
Fruit is simultaneously bad, illustrates that rolling thickness is unsuitable too high；Reference examples 7 to reference examples 10 change aluminum alloy quenching agent raw material proportioning and
Dosage, it have impact on the property of quenching medium synthesis so that mechanical performance of the alloy after low temperature quenching processing is decreased obviously；Therefore,
The aluminium alloy prepared using the present invention has excellent mechanical strength.
Claims (4)
1. a kind of high-strength aluminum alloy processing technology, it is characterised in that this method comprises the following steps：
Step 1, silex, pure magnesium, pure vanadium, fine aluminium, pure iron are taken, be placed in non-consumable vacuum arc melting furnace, in vacuum
2.0x10^-2Pa melt backs 9 times, the smelting time of each sample 1 minute, obtains the uniform alloy cast ingot of composition every time；
Step 2, taken out after melted alloy cast ingot is cooled down into 10 minutes in smelting furnace；
Step 3, Muffle furnace is warming up to 1000 DEG C, is put into alloy cast ingot and is incubated 30 minutes, ensure ingot casting whole heat penetration, stir aluminium
Alloy liquid, stirring should be carried out steadily, stress not play too big wave, to prevent in oxide entrapment melt, stirring 3 hours,
Liquid is enabled aluminum alloy to sufficiently to mix；
Step 4, stirring are stood after terminating, and time of standing is 20min, and after standing, the slag thing in aluminum alloy melt body can be isolated
Come, and polymerize blocking, take out ingot casting from Muffle furnace, multi- pass rolling deformation is carried out on fast transfer to two roll surface milling trains；
Placed into after the completion of step 5, rolling for the first time in Muffle furnace and be incubated 3 minutes, taking-up is quickly rolled in the same direction for the second time again
System, is circulated according to this, and the control of each volume under pressure finally makes alloy pig deflection reach 70% the 9% of alloy pig original depth；
Step 6, last a time deformation after, sheet alloy is positioned in quenching medium and is cooled to room temperature；
Step 7, the sheet alloy surface that will be cooled to room temperature are stripped off the skin and obtain high-strength aluminum alloy with figuring of surface.
A kind of 2. high-strength aluminum alloy processing technology according to claim 1, it is characterised in that
Described quenching medium preparation method is as follows：
Step 1,0.8 part of stearic acid, 18 parts of cornstarch, 14 portions of palm fibres are put oil and are dissolved in 10 parts of polyethers first, mixed
Liquid, it is subsequently added into the water of 3 times of mixeding liquid volume and is transferred in reactor, reaction condition is 150 DEG C, 800r/min, 3MPa, instead
Be 2h between seasonable, after reaction terminates, temperature is down to 80 DEG C, adds 4 parts of laurates and 3 parts of butyl acetates, quiet after stirring 10min
Put；
Step 2, then centrifuged, centrifugal rotational speed 12000r/min, centrifugation time 10min, take supernatant after centrifugation, add
Add 9 parts of sodium benzoates, 3 parts of arsenic butters, 8 parts of D-Asps and 10 parts of polyethylene glycol, after stirring, temperature rises to 63
DEG C, 1h is incubated, room temperature is finally cooled to, paraffin oil seal, produces.
A kind of 3. high-strength aluminum alloy processing technology according to claim 1：It is characterized in that described silex is to receive
Rice silica flour.
A kind of 4. high-strength aluminum alloy processing technology according to claim 1：It is characterized in that
Described silex is Si-Na-LTA nano materials, and preparation method is as follows：
Step 1, by 200g particle diameters be 30nm nano silicon oxide put into the aqueous solution, with 3000rpm stirring at 20 DEG C
After speed mechanical stirring 15min, the aqueous dispersions of nano silicon oxide are obtained；Add into the aqueous dispersions of obtained nano silicon oxide
Enter 15g modifer L monothio salicylic acids, at a temperature of 80 DEG C, stirred under 3000rpm rotating speed, obtain modified nano silicon oxide
Suspension；The suspension of gained is spray-dried, the rotating speed of spray drying is 16000rpm, and the temperature of spray drying is
100 DEG C, obtain organic acidifying nano-silicon；
Step 2, organic acidifying nano-silicon and 100gNa-LTA zeolite powders by 300g, activate at 500 DEG C, are distributed to
In 10L ethanol, the mixture of compound and ethanol is transferred in the three-necked flask equipped with 2L ammoniacal liquor after ball milling, by temperature
60 DEG C are increased to, 1h is heated, the 1L then added TEOS, continues stirring 6, the slurries filtration that will be obtained, 3 are washed with ethanol
It is secondary, finally obtain modified Si-Na-LTA nano materials.
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Cited By (1)
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| CN107876091A (en) * | 2017-11-13 | 2018-04-06 | 江苏师范大学 | A kind of preparation method of catalyst for ethanol delydration to ethylene |
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Application publication date: 20180126 |