CN109280784A - A kind of high-strength cast aluminium alloy material and preparation method thereof - Google Patents
A kind of high-strength cast aluminium alloy material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of high-strength cast aluminium alloy material and preparation method thereof, a kind of preparation method of high-strength cast aluminium alloy material, comprising the following steps: I, melting；II, iron is taken off；III, the metal lacked is added；IV, composition adjustment is carried out；V, degasification is refined；VI, rossing test；VII, casting are allowed to ingot.A kind of high-strength cast aluminium alloy material, the chemical element including following mass parts: Si:10~10.8 part, Fe:0.6~0.8 part, Cu:2.0~3.5 part；Mn:0.15~0.35 part, Mg:0.1~0.3 part, Zn:0.10~0.95 part, Al:83.45~85.95 part.The present invention not only has good appearance, preferable light weight effect, will not generate decrepitation, but also the performance requirement being able to satisfy on Automobile Part especially structural member, has wide applicability.
Description
Technical field
The present invention relates to a kind of preparation method more particularly to a kind of high-strength cast aluminium alloy material and preparation method thereof,
Belong to aluminum alloy materials technical field.
Background technique
With the continuous propulsion of automotive light weight technology, cast aluminium alloy gold is largely used in terms of each part of automobile, casting
The market demand for making aluminium alloy especially pack alloy increases year by year, because it is with good casting character and mechanical property
Energy, excellent air-tightness and mobility and hot-cracking resistance etc., are widely used on a variety of components, according to statistics, aluminium
Alloy-steel casting accounts for about the 77% of automobile aluminum amount, and wherein die casting accounts for the 50% of automobile aluminum amount, including automobile engine cylinder-body,
Cylinder cap, gearbox, diverter and electric machine casing etc..Since die casting is unable to heat treatment reinforcement, and asking there are shrinkage porosite and shrinkage cavity
Topic, die casting performance is not generally high, is unable to satisfy the requirement for further mitigating weight by Optimal Structure Designing.Currently, from
The cast aluminium alloy gold series of reinforcing only has Al-Zn series, this is that alloy in as-cast condition just has quenching structure feature, without
Heat treatment is achieved with high intensity, and the current existing aluminium alloy trade mark has good casting character, cutting ability, welding
Performance and dimensional stability can exempt deformation caused by quenching process and change in size, but generate decrepitation, and intensity is not
Height hinders the application of alloy.
Summary of the invention
In order to solve shortcoming present in above-mentioned technology, the present invention provides a kind of high-strength cast aluminium alloy materials
And preparation method thereof.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of high-strength cast aluminium alloy material
Preparation method, preparation method the following steps are included:
I, melting: the cast alumin(i)um slice of 1500~2000Kg being added into smelting furnace, is heated to 560 DEG C of cast alumin(i)um slices and starts to melt
Change, then proceed to be warming up to 680 DEG C, after its all fusing, the dross on obtained molten aluminum surface is disposed；Sampling uses
Direct-reading spectrometer measures the chemical component of molten aluminum in furnace, is adjusted by the way that cast alumin(i)um slice and wrought aluminium slice is added simultaneously into molten aluminum
The chemical component of molten aluminum is until the content of Zn is controlled at 1.05~1.2 parts in molten aluminum；
II, it takes off iron: after the cast alumin(i)um slice and wrought aluminium that 8500~9500Kg is added are sliced and all melt, it is floating to remove surface
Slag, temperature control at 630 DEG C~680 DEG C, the free ironware for sinking to furnace bottom are raked off, after sufficiently removing free iron, molten aluminum is put
To lower furnace, then its chemical component of sampling analysis, confirmation Zn content control heat up at 1.05~1.2 parts and prepare that alloy is added
Element；
III, the metal lacked is added according to the analysis report of chemical component in step II, specific steps are as follows:
When temperature of aluminum liquid is increased to 750 DEG C~800 DEG C, matched according to the content of 10.5 parts of Si, 2.8 parts of Cu, sequentially add simple substance Si,
Cu；It at lower furnace inside holding 20~25 minutes, is then stirred, the simple substance for beaing molten aluminum using trivet to ensure to be added is abundant
It melts；
IV, after alloy all melts, uniformly moved in furnace using nitrogen sparge tube, sampling analysis again after being sufficiently stirred；
Then fine aluminium 1500~2500Kg of leftover pieces that A00 aluminium or 99% or more aluminum content is added is required according to the chemical component of molten aluminum,
680 DEG C~720 DEG C are cooled to, carries out composition adjustment until chemical component meets the chemical composition of aluminum alloy materials；
V, temperature of aluminum liquid is adjusted between 700~740 DEG C, refining agent is added and carries out refining degasification, using 0.3~0.5%
Refining agent be blown into furnace together with N2, refine 30~45 minutes, be then directly blown into N2 degasification 20~30 minutes；
VI, degasification carry out rossing test before terminating, the smooth bubble-free of sample surrounding of rossing test is cast；Before casting
It is qualified to confirm whole compositions and air content, and confirms temperature of aluminum liquid at 700 DEG C ± 20 DEG C for sampling analysis again；
VII, can cast within standing 10 minutes or more after taking off the aluminium slag on molten aluminum surface completely is allowed to ingot.
Further, the cast alumin(i)um slice and wrought aluminium slice being added every time in step I in molten aluminum are controlled in 1200~1500Kg,
To be all molten into principle in the case where not heating up, and need to do a chemical composition analysis after every addition 2~3 times.
Further, in step I the step of descum are as follows: cast alumin(i)um slice contains some field trashes, can float after melting,
The dross on molten aluminum surface is raked off using creeper.
Further, the step of rossing is tested in step VI are as follows: molten aluminum is scooped on the insulating brick with hole, with molten aluminum
Solidification, gas can be precipitated inside molten aluminum and be presented on surface.
A kind of high-strength cast aluminium alloy material, the chemical element including following mass parts: Si:10~10.8 part, Fe:
0.6~0.8 part, Cu:2.0~3.5 part；Mn:0.15~0.35 part, Mg:0.1~0.3 part, Zn:0.10~0.95 part, Al:
83.45~85.95 parts.
The present invention, which provides a kind of reasonable aluminum alloy materials of formula, makes it have enough intensity to be able to satisfy automobile product to property
Can requirement, product made of the material not only has good appearance, preferable light weight effect, will not generate decrepitation,
But also it is able to satisfy the performance requirement on Automobile Part especially structural member, there is high intensity, while the aluminium alloy of this method manufacture
Material has lower dregginess and air content, substantially increases the yield rate of product.
The present invention mainly optimizes the composition proportion of aluminum alloy materials, it is made not only to be convenient for Die Casting, and
Meet the loading demands of Automobile Part product there are also enough intensity, mechanical performance, tensile strength are all larger than 300Mpa, extend
Rate is greater than 2.5%, is fully able to meet the loading demands as automobile spare part.In addition, this materials'use junked-auto, household electrical appliances
Etc. the miscellaneous aluminium that gives up as primary raw material, meet the requirement of national development circular economy, can be saved for country valuable ore resource and
The electric energy for producing primary aluminum and using, can be widely used in high-strength vehicle cast aluminium alloy material.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
A kind of preparation method of high-strength cast aluminium alloy material, comprising the following steps:
Melting: the cast alumin(i)um slice of 1500~2000Kg being added into smelting furnace, and cast alumin(i)um slice selects automobile engine, speed change
Aluminium scrap material of the cast aluminium alloy golds discard such as tank shell after cracking and sorting；It is heated to 560 DEG C of cast alumin(i)um slices to start to melt, then
680 DEG C are continuously heating to, after its all fusing, the dross on obtained molten aluminum surface is disposed；The step of descum are as follows:
Cast alumin(i)um slice contains some field trashes, can float after melting, rakes off by the dross on molten aluminum surface using creeper；Sampling, makes
The chemical component of molten aluminum in furnace is measured with direct-reading spectrometer, the foundation that chemical component at this time is only used as next stage to feed；It is right
All elements measure, and only Zn element is benchmark, as following ingredient foundation；By the way that cast alumin(i)um is added simultaneously into molten aluminum
Slice and wrought aluminium are sliced to adjust the chemical component of molten aluminum until the content of Zn is controlled at 1.05~1.2 parts in molten aluminum；Add every time
The cast alumin(i)um slice and wrought aluminium slice entered in molten aluminum is controlled in 1200~1500Kg, to be all molten into original in the case where not heating up
Then, and after every addition 2~3 times it needs to do a chemical composition analysis.Cast alumin(i)um is sliced and the multiple batches of addition of wrought aluminium slice point, specific to add
Entering quantity and sees Zn constituent content, cast alumin(i)um slice and wrought aluminium slice ingredient are not unalterable, therefore to do side adjustment in medial side,
But error will not be too big.
II, iron is taken off；After the cast alumin(i)um slice and wrought aluminium that 8500~9500Kg is added are sliced and all melt, it is floating to remove surface
Slag, temperature control at 630 DEG C~680 DEG C, the free ironware for sinking to furnace bottom are raked off, after sufficiently removing free iron, molten aluminum is put
To lower furnace, then its chemical component of sampling analysis, confirmation Zn content control heat up at 1.05~1.2 parts and prepare that alloy is added
Element；
III, the metal lacked is added according to the analysis report of chemical component in step II, specific steps are as follows:
When temperature of aluminum liquid is increased to 750 DEG C~800 DEG C, matched according to the content of 10.5 parts of Si, 2.8 parts of Cu, sequentially add simple substance Si,
Cu；Quality is wherein added according to obtained by actually measured data magnitude of recruitment；At lower furnace inside holding 20~25 minutes, then stirred
It mixes, beats molten aluminum using trivet to ensure that the simple substance being added sufficiently has melted；
IV, after alloy all melts, uniformly moved in furnace using nitrogen sparge tube, sampling analysis again after being sufficiently stirred；
Then fine aluminium 1500~2500Kg of leftover pieces that A00 aluminium or 99% or more aluminum content is added is required according to the chemical component of molten aluminum,
680 DEG C~720 DEG C, after being all melt into molten aluminum are cooled to, carries out composition adjustment until chemical component meets the change of aluminum alloy materials
Learn composition；It must assure that comprising required multi-element chemical composition, and chemical composition analysis all uses direct reading spectrometry,
Direct reading spectrometry carries out quick elemental analysis to solid metal sample using electric arc/spark excitation direct reading spectrometry.By
In containing some impurity in cast alumin(i)um slice and wrought aluminium slice, thus in resulting molten aluminum containing no more than 0.05 part other are single
The summation of impurity element, impurity element is not more than 0.15 part.
V, temperature of aluminum liquid is adjusted between 700~740 DEG C, adjusts temperature, temperature properly directly refines, and temperature is low then to be needed
It heats up；Refining agent is added and carries out refining degasification, using 0.3~0.5% refining agent and N2It is blown into furnace together, refining 30~
45 minutes, then directly it is blown into N2Degasification 20~30 minutes；
VI, degasification carry out rossing test before terminating, the smooth bubble-free of sample surrounding of rossing test is cast；Before casting
It is qualified to confirm whole compositions and air content, and confirms temperature of aluminum liquid at 700 DEG C ± 20 DEG C for sampling analysis again；Scrape skin test
The step of testing are as follows: molten aluminum is scooped on the insulating brick with hole, with the solidification of molten aluminum, gas can be precipitated inside molten aluminum and be presented on
Surface.
VII, can cast within standing 10 minutes or more after taking off the aluminium slag on molten aluminum surface completely is allowed to ingot.
A kind of high-strength cast aluminium alloy material, the chemical element including following mass parts: Si:10~10.8 part, Fe:
0.6~0.8 part, Cu:2.0~3.5 part；Mn:0.15~0.35 part, Mg:0.1~0.3 part, Zn:0.10~0.95 part, Al:
83.45~85.95 parts.
Below with reference to embodiment, the present invention is described in further detail.
Embodiment one:
A kind of preparation method of high-strength cast aluminium alloy material, comprising the following steps:
I, melting: the cast alumin(i)um slice of 2000Kg being added into smelting furnace, is heated to 560 DEG C of cast alumin(i)um slices and starts to melt, so
After be continuously heating to 680 DEG C, after its all fusing after, the dross on obtained molten aluminum surface is disposed；Sampling, uses direct-reading light
Spectrometer measures the chemical component of molten aluminum in furnace, adjusts molten aluminum by the way that cast alumin(i)um slice and wrought aluminium slice is added simultaneously into molten aluminum
Chemical component is until the content of Zn is controlled at 1.05 parts in molten aluminum；
II, iron is taken off；After the cast alumin(i)um slice and wrought aluminium that 9500Kg is added are sliced and all melt, surface scum, temperature are removed
The free ironware for sinking to furnace bottom is raked off at 630 DEG C, after sufficiently removing free iron, molten aluminum is put to lower furnace, is then taken by degree control
Sample analyzes its chemical component, and at 1.05 parts, heating prepares that alloying element is added for confirmation Zn content control；
III, the metal lacked is added according to the analysis report of chemical component in step II, specific steps are as follows:
When temperature of aluminum liquid is increased to 750 DEG C, is matched according to the content of 10.5 parts of Si, 2.8 parts of Cu, sequentially add simple substance Si, Cu；Under
It furnace inside holding 20 minutes, is then stirred, beats molten aluminum using trivet to ensure that the simple substance being added sufficiently has melted；
IV, after alloy all melts, uniformly moved in furnace using nitrogen sparge tube, sampling analysis again after being sufficiently stirred；
Then the fine aluminium leftover pieces 1500Kg that A00 aluminium or 99% or more aluminum content is added is required according to the chemical component of molten aluminum, is cooled to
680 DEG C, composition adjustment is carried out until chemical component meets the chemical composition of aluminum alloy materials；
V, temperature of aluminum liquid is adjusted between 700 DEG C, be added refining agent carry out refining degasification, using 0.3% refining agent with
N2 is blown into furnace together, is refined 30 minutes, is then directly blown into N2 degasification 20 minutes；
VI, degasification carry out rossing test before terminating, the smooth bubble-free of sample surrounding of rossing test is cast；Before casting
It is qualified to confirm whole compositions and air content, and confirms temperature of aluminum liquid at 680 DEG C for sampling analysis again；
VII, can cast within standing 10 minutes or more after taking off the aluminium slag on molten aluminum surface completely is allowed to ingot.
According to the high-strength cast aluminium alloy material that method made above obtains, the chemical element including following mass parts:
Si:10 parts, Fe:0.6 parts, Cu:2.0 parts；Mn:0.15 parts, Mg:0.3 parts, Zn:0.95 parts, Al:85.85 parts.
The sample of cast aluminium alloy material casting manufactured in the present embodiment is subjected to tensile property test, as a result are as follows: tension
Intensity is 328Mpa, yield strength 187Mpa, elongation percentage 3.15%, and Bu Shi intensity is 118.2HBW, dregginess 0/20,
Air-blowing quantity is 0.15cc/100gAl.
Embodiment two:
A kind of preparation method of high-strength cast aluminium alloy material, comprising the following steps:
I, melting: the cast alumin(i)um slice of 1850Kg being added into smelting furnace, is heated to 560 DEG C of cast alumin(i)um slices and starts to melt, so
After be continuously heating to 680 DEG C, after its all fusing after, the dross on obtained molten aluminum surface is disposed；Sampling, uses direct-reading light
Spectrometer measures the chemical component of molten aluminum in furnace, adjusts molten aluminum by the way that cast alumin(i)um slice and wrought aluminium slice is added simultaneously into molten aluminum
Chemical component is until the content of Zn is controlled at 1.1 parts in molten aluminum；
II, iron is taken off；After the cast alumin(i)um slice and wrought aluminium that 9100Kg is added are sliced and all melt, surface scum, temperature are removed
The free ironware for sinking to furnace bottom is raked off at 645 DEG C, after sufficiently removing free iron, molten aluminum is put to lower furnace, is then taken by degree control
Sample analyzes its chemical component, and at 1.1 parts, heating prepares that alloying element is added for confirmation Zn content control；
III, the metal lacked is added according to the analysis report of chemical component in step II, specific steps are as follows:
When temperature of aluminum liquid is increased to 765 DEG C, is matched according to the content of 10.5 parts of Si, 2.8 parts of Cu, sequentially add simple substance Si, Cu；Under
It furnace inside holding 21 minutes, is then stirred, beats molten aluminum using trivet to ensure that the simple substance being added sufficiently has melted；
IV, after alloy all melts, uniformly moved in furnace using nitrogen sparge tube, sampling analysis again after being sufficiently stirred；
Then the fine aluminium leftover pieces 1800Kg that A00 aluminium or 99% or more aluminum content is added is required according to the chemical component of molten aluminum, is cooled to
695 DEG C, composition adjustment is carried out until chemical component meets the chemical composition of aluminum alloy materials；
V, temperature of aluminum liquid is adjusted between 715 DEG C, be added refining agent carry out refining degasification, using 0.4% refining agent with
N2It is blown into furnace together, refines 35 minutes, be then directly blown into N2Degasification 23 minutes；
VI, degasification carry out rossing test before terminating, the smooth bubble-free of sample surrounding of rossing test is cast；Before casting
It is qualified to confirm whole compositions and air content, and confirms temperature of aluminum liquid at 700 DEG C for sampling analysis again；
VII, can cast within standing 10 minutes or more after taking off the aluminium slag on molten aluminum surface completely is allowed to ingot.
According to the high-strength cast aluminium alloy material that method made above obtains, the chemical element including following mass parts:
Si:10.3 parts, Fe:0.7 parts, Cu:2.5 parts；Mn:0.22 parts, Mg:0.28 parts, Zn:0.85 parts, Al:85.01 parts.
The sample of cast aluminium alloy material casting manufactured in the present embodiment is subjected to tensile property test, as a result are as follows: tension
Intensity is 335Mpa, yield strength 198Mpa, elongation percentage 3.08%, and Bu Shi intensity is 109.8HBW, dregginess 0/20,
Air-blowing quantity is 0.18cc/100gAl.
Embodiment three:
A kind of preparation method of high-strength cast aluminium alloy material, comprising the following steps:
I, melting: the cast alumin(i)um slice of 1650Kg being added into smelting furnace, is heated to 560 DEG C of cast alumin(i)um slices and starts to melt, so
After be continuously heating to 680 DEG C, after its all fusing after, the dross on obtained molten aluminum surface is disposed；Sampling, uses direct-reading light
Spectrometer measures the chemical component of molten aluminum in furnace, adjusts molten aluminum by the way that cast alumin(i)um slice and wrought aluminium slice is added simultaneously into molten aluminum
Chemical component is until the content of Zn is controlled at 1.15 parts in molten aluminum；
II, iron is taken off；After the cast alumin(i)um slice and wrought aluminium that 8800Kg is added are sliced and all melt, surface scum, temperature are removed
The free ironware for sinking to furnace bottom is raked off at 680 DEG C, after sufficiently removing free iron, molten aluminum is put to lower furnace, is then taken by degree control
Sample analyzes its chemical component, and at 1.15 parts, heating prepares that alloying element is added for confirmation Zn content control；
III, the metal lacked is added according to the analysis report of chemical component in step II, specific steps are as follows:
When temperature of aluminum liquid is increased to 800 DEG C, is matched according to the content of 10.5 parts of Si, 2.8 parts of Cu, sequentially add simple substance Si, Cu；Under
It furnace inside holding 25 minutes, is then stirred, beats molten aluminum using trivet to ensure that the simple substance being added sufficiently has melted；
IV, after alloy all melts, uniformly moved in furnace using nitrogen sparge tube, sampling analysis again after being sufficiently stirred；
Then the fine aluminium leftover pieces 2500Kg that A00 aluminium or 99% or more aluminum content is added is required according to the chemical component of molten aluminum, is cooled to
720 DEG C, composition adjustment is carried out until chemical component meets the chemical composition of aluminum alloy materials；
V, temperature of aluminum liquid is adjusted between 740 DEG C, be added refining agent carry out refining degasification, using 0.5% refining agent with
N2It is blown into furnace together, refines 45 minutes, be then directly blown into N2Degasification 30 minutes；
VI, degasification carry out rossing test before terminating, the smooth bubble-free of sample surrounding of rossing test is cast；Before casting
It is qualified to confirm whole compositions and air content, and confirms temperature of aluminum liquid at 720 DEG C for sampling analysis again；
VII, can cast within standing 10 minutes or more after taking off the aluminium slag on molten aluminum surface completely is allowed to ingot.
According to the high-strength cast aluminium alloy material that method made above obtains, the chemical element including following mass parts:
Si:10.6 parts, Fe:0.8 parts, Cu:3.0 parts；Mn:0.35 parts, Mg:0.26 parts, Zn:0.80 parts, Al:84.07 parts.
The sample of cast aluminium alloy material casting manufactured in the present embodiment is subjected to tensile property test, as a result are as follows: tension
Intensity is 320Mpa, yield strength 195Mpa, elongation percentage 3.12%, and Bu Shi intensity is 118.3HBW, dregginess 0/20,
Air-blowing quantity is 0.18cc/100gAl.
Example IV:
A kind of preparation method of high-strength cast aluminium alloy material, comprising the following steps:
I, melting: the cast alumin(i)um slice of 1500Kg being added into smelting furnace, is heated to 560 DEG C of cast alumin(i)um slices and starts to melt, so
After be continuously heating to 680 DEG C, after its all fusing after, the dross on obtained molten aluminum surface is disposed；Sampling, uses direct-reading light
Spectrometer measures the chemical component of molten aluminum in furnace, adjusts molten aluminum by the way that cast alumin(i)um slice and wrought aluminium slice is added simultaneously into molten aluminum
Chemical component is until the content of Zn is controlled at 1.2 parts in molten aluminum；
II, iron is taken off；After the cast alumin(i)um slice and wrought aluminium that 8500g is added are sliced and all melt, surface scum, temperature are removed
The free ironware for sinking to furnace bottom is raked off at 660 DEG C, after sufficiently removing free iron, molten aluminum is put to lower furnace, is then sampled by control
Its chemical component is analyzed, at 1.2 parts, heating prepares that alloying element is added for confirmation Zn content control；
III, the metal lacked is added according to the analysis report of chemical component in step II, specific steps are as follows:
When temperature of aluminum liquid is increased to 780 DEG C, is matched according to the content of 10.5 parts of Si, 2.8 parts of Cu, sequentially add simple substance Si, Cu；Under
It furnace inside holding 23 minutes, is then stirred, beats molten aluminum using trivet to ensure that the simple substance being added sufficiently has melted；
IV, after alloy all melts, uniformly moved in furnace using nitrogen sparge tube, sampling analysis again after being sufficiently stirred；
Then the fine aluminium leftover pieces 2100Kg that A00 aluminium or 99% or more aluminum content is added is required according to the chemical component of molten aluminum, is cooled to
705 DEG C, composition adjustment is carried out until chemical component meets the chemical composition of aluminum alloy materials；
V, temperature of aluminum liquid is adjusted between 730 DEG C, be added refining agent carry out refining degasification, using 0.45% refining agent with
N2It is blown into furnace together, refines 40 minutes, be then directly blown into N2Degasification 26 minutes；
VI, degasification carry out rossing test before terminating, the smooth bubble-free of sample surrounding of rossing test is cast；Before casting
It is qualified to confirm whole compositions and air content, and confirms temperature of aluminum liquid at 710 DEG C for sampling analysis again；
VII, can cast within standing 10 minutes or more after taking off the aluminium slag on molten aluminum surface completely is allowed to ingot.
According to the high-strength cast aluminium alloy material that method made above obtains, the chemical element including following mass parts:
Si:10.8 parts, Fe:0.7 parts, Cu:3.5 parts；Mn:0.29 parts, Mg:0.25 parts, Zn:0.90 parts, Al:83.45 parts.
The sample of cast aluminium alloy material casting manufactured in the present embodiment is subjected to tensile property test, as a result are as follows: tension
Intensity is 341Mpa, yield strength 202Mpa, elongation percentage 3.24%, and Bu Shi intensity is 115.4HBW, dregginess 0/20,
Air-blowing quantity is 0.20cc/100gAl.
Embodiment five:
A kind of preparation method of high-strength cast aluminium alloy material, comprising the following steps:
I, melting: the cast alumin(i)um slice of 1750Kg being added into smelting furnace, is heated to 560 DEG C of cast alumin(i)um slices and starts to melt, so
After be continuously heating to 680 DEG C, after its all fusing after, the dross on obtained molten aluminum surface is disposed；Sampling, uses direct-reading light
Spectrometer measures the chemical component of molten aluminum in furnace, adjusts molten aluminum by the way that cast alumin(i)um slice and wrought aluminium slice is added simultaneously into molten aluminum
Chemical component is until the content of Zn is controlled at 1.12 parts in molten aluminum；
II, iron is taken off；After the cast alumin(i)um slice and wrought aluminium that 9000g is added are sliced and all melt, surface scum, temperature are removed
The free ironware for sinking to furnace bottom is raked off at 655 DEG C, after sufficiently removing free iron, molten aluminum is put to lower furnace, is then sampled by control
Its chemical component is analyzed, at 1.12 parts, heating prepares that alloying element is added for confirmation Zn content control；
III, the metal lacked is added according to the analysis report of chemical component in step II, specific steps are as follows:
When temperature of aluminum liquid is increased to 775 DEG C, is matched according to the content of 10.5 parts of Si, 2.8 parts of Cu, sequentially add simple substance Si, Cu；Under
It furnace inside holding 22 minutes, is then stirred, beats molten aluminum using trivet to ensure that the simple substance being added sufficiently has melted；
IV, after alloy all melts, uniformly moved in furnace using nitrogen sparge tube, sampling analysis again after being sufficiently stirred；
Then the fine aluminium leftover pieces 2000Kg that A00 aluminium or 99% or more aluminum content is added is required according to the chemical component of molten aluminum, is cooled to
700 DEG C, composition adjustment is carried out until chemical component meets the chemical composition of aluminum alloy materials；
V, temperature of aluminum liquid is adjusted between 720 DEG C, be added refining agent carry out refining degasification, using 0.40% refining agent with
N2 is blown into furnace together, is refined 37 minutes, is then directly blown into N2 degasification 25 minutes；
VI, degasification carry out rossing test before terminating, the smooth bubble-free of sample surrounding of rossing test is cast；Before casting
It is qualified to confirm whole compositions and air content, and confirms temperature of aluminum liquid at 700 DEG C for sampling analysis again；
VII, can cast within standing 10 minutes or more after taking off the aluminium slag on molten aluminum surface completely is allowed to ingot.
According to the high-strength cast aluminium alloy material that method made above obtains, the chemical element including following mass parts:
Si:10.4 parts, Fe:0.75 parts, Cu:2.7 parts；Mn:0.25 parts, Mg:0.10 parts, Zn:0.10 parts, Al:85.95 parts.
The sample of cast aluminium alloy material casting manufactured in the present embodiment is subjected to tensile property test, as a result are as follows: tension
Intensity is 330Mpa, yield strength 194Mpa, elongation percentage 3.16%, and Bu Shi intensity is 114.3HBW, dregginess 0/20,
Air-blowing quantity is 0.19cc/100gAl.
Comparative experiments: tensile property test is carried out to similar products, as a result are as follows: tensile strength 196Mpa, yield strength
For 102Mpa, elongation percentage 1.28%, Bu Shi intensity is 78.4HBW, dregginess 2/20, air-blowing quantity 0.4cc/100gAl.
Aluminum alloy materials, which are made, in the present invention has excellent tensile strength and elongation percentage, and tensile strength can achieve 300MPa
More than, elongation percentage reaches 2.5% or more, can satisfy the requirement of automobile spare part load；Good casting property, can be with molding structure
Complicated casting, when casting, the aluminum water mobility of the trade mark material is better than general cast aluminium alloy gold；Processing performance is good, because of alloy
The special proportion of element, tissue is interior to be existed without blocky Si and harmful phase, has good chip；The aluminium alloy of this method manufacture
Material has lower dregginess and air content, respectively reaches 0/20 and 0.20cc/100gAl level, keeps the yield rate of product big
To improve.
Above embodiment is not limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the scope of technical solution of the present invention, also belong to this hair
Bright protection scope.
Claims (5)
1. a kind of preparation method of high-strength cast aluminium alloy material, it is characterised in that: the preparation method comprises the following steps:
I, melting: the cast alumin(i)um slice of 1500~2000Kg being added into smelting furnace, is heated to 560 DEG C of cast alumin(i)um slices and starts to melt,
It then proceedes to be warming up to 680 DEG C, after its all fusing, the dross on obtained molten aluminum surface is disposed；Sampling, uses direct-reading
Spectrometer measures the chemical component of molten aluminum in furnace, adjusts molten aluminum by the way that cast alumin(i)um slice and wrought aluminium slice is added simultaneously into molten aluminum
Chemical component until molten aluminum in Zn content control at 1.05~1.2 parts；
II, it takes off iron: after the cast alumin(i)um slice and wrought aluminium that 8500~9500Kg is added are sliced and all melt, removing surface scum,
Temperature is controlled at 630 DEG C~680 DEG C, and the free ironware for sinking to furnace bottom is raked off, after sufficiently removing free iron, molten aluminum is put under
Furnace, then its chemical component of sampling analysis, confirmation Zn content control heat up at 1.05~1.2 parts and prepare that alloying element is added；
III, the metal lacked is added according to the analysis report of chemical component in step II, specific steps are as follows: by aluminium
When liquid temperature is increased to 750 DEG C~800 DEG C, is matched according to the content of 10.5 parts of Si, 2.8 parts of Cu, sequentially add simple substance Si, Cu；
It at lower furnace inside holding 20~25 minutes, is then stirred, the simple substance for beaing molten aluminum using trivet to ensure to be added is sufficiently molten
Solution；
IV, after alloy all melts, uniformly moved in furnace using nitrogen sparge tube, sampling analysis again after being sufficiently stirred；Then
Fine aluminium 1500~2500Kg of leftover pieces that A00 aluminium or 99% or more aluminum content is added, cooling are required according to the chemical component of molten aluminum
To 680 DEG C~720 DEG C, composition adjustment is carried out until chemical component meets the chemical composition of aluminum alloy materials；
V, temperature of aluminum liquid is adjusted between 700~740 DEG C, refining agent is added and carries out refining degasification, using 0.3~0.5% essence
Refine agent and N2It is blown into furnace together, refines 30~45 minutes, be then directly blown into N2Degasification 20~30 minutes；
VI, degasification carry out rossing test before terminating, the smooth bubble-free of sample surrounding of rossing test is cast；Before casting again
It is qualified to confirm whole compositions and air content, and confirms temperature of aluminum liquid at 700 DEG C ± 20 DEG C for sampling analysis；
VII, can cast within standing 10 minutes or more after taking off the aluminium slag on molten aluminum surface completely is allowed to ingot.
2. the preparation method of high-strength cast aluminium alloy material according to claim 1, it is characterised in that: the step I
In cast alumin(i)um slice in molten aluminum and wrought aluminium slice control are added every time in 1200~1500Kg, in the case where not heating up all
It is molten into principle, and needs to do a chemical composition analysis after every addition 2~3 times.
3. the preparation method of high-strength cast aluminium alloy material according to claim 1, it is characterised in that: the step I
The step of middle descum are as follows: cast alumin(i)um slice contains some field trashes, can float after melting, using creeper by molten aluminum surface
Dross, which is raked off, to be come.
4. the preparation method of high-strength cast aluminium alloy material according to claim 1, it is characterised in that: the step VI
The step of middle rossing is tested are as follows: molten aluminum is scooped on the insulating brick with hole, with the solidification of molten aluminum, gas can analyse inside molten aluminum
It is presented on surface out.
5. a kind of high-strength cast aluminium alloy material as made from preparation method described in claim 1, it is characterised in that: described
Aluminum alloy materials include the chemical element of following mass parts: Si:10~10.8 part, Fe:0.6~0.8 part, Cu:2.0~3.5 part；
Mn:0.15~0.35 part, Mg:0.1~0.3 part, Zn:0.10~0.95 part, Al:83.45~85.95 part.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0457340A1 (en) * | 1990-05-18 | 1991-11-21 | Toyota Jidosha Kabushiki Kaisha | Titanium-aluminium alloy and process for producing the same |
| CN103243246A (en) * | 2013-05-24 | 2013-08-14 | 怡球金属资源再生（中国）股份有限公司 | High-quality and high-hardness aluminum alloy ingot and production method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0457340A1 (en) * | 1990-05-18 | 1991-11-21 | Toyota Jidosha Kabushiki Kaisha | Titanium-aluminium alloy and process for producing the same |
| CN103243246A (en) * | 2013-05-24 | 2013-08-14 | 怡球金属资源再生（中国）股份有限公司 | High-quality and high-hardness aluminum alloy ingot and production method thereof |
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