CN109722576A - A kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials - Google Patents
A kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials Download PDFInfo
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- CN109722576A CN109722576A CN201910024662.5A CN201910024662A CN109722576A CN 109722576 A CN109722576 A CN 109722576A CN 201910024662 A CN201910024662 A CN 201910024662A CN 109722576 A CN109722576 A CN 109722576A
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Abstract
A kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials (5052 alloy), include the following steps: melting, refining standing, online processing, casting, the intensity of aluminum alloy materials is improved by this process, the internal stress value of aluminum alloy materials reduces, low speed casting, big crystal grain tissue can also be obtained, the tissue of ingot casting section gradient is more uniform.By high temperature soak, while eliminating macro-stress, microsegregation is eliminated, chemical component is more evenly.For the production of subsequent plate, the influence of hereditary internal stress is eliminated.
Description
Technical field
The present invention relates to a kind of aluminium alloy cast ingot preparation field more particularly to a kind of ultra-low residue stress aluminum alloy materials
Ingot casting process of preparing.
Background technique
The application of aluminium alloy in the industry increases year by year, but final product quality is irregular.Produce the aluminium alloy of high quality
Material becomes the task of top priority.Be constantly progressive development with science and technology, aluminium alloy extrusions constantly towards enlargement, integration,
The homogenization of structure property develops with high quality direction.Therefore high-performance aluminium alloy is prepared as hot spot concerned by people.
Traditional handicraft disadvantage: ingot structure complicated component, the second phase are unevenly distributed, and grain size is different in ingot casting, leads
Cause inside ingot macro-stress bigger than normal.Transgranular segregation leads to the presence of transgranular microstress, produces to the heredity of following process product
Raw increase influences.
There are the macro-stress of casting and transgranular and intercrystalline segregations in the process of production and processing, when casting for aluminum alloy materials
The internal stress of generation, internal stress when ingot casting are interspersed, and the internal stress in aluminum alloy materials is bigger, the aluminium produced
Sheet alloy is caused aluminum alloy plate materials product deflection in machining very big, is unable to satisfy due to the heredity of original gene
It is applied in the high-end devices such as semiconductor equipment, medical machinery equipment, electronic instrument.Stress can also cause answering for aluminum alloy materials
Power corrosion cracking, fatigue behaviour etc..
Therefore, this field needs to invent new treatment process, to reduce residual stress.
Summary of the invention
Point in view of the above problems provides a kind of super it is an object of the invention to overcome deficiency in the prior art
The ingot casting process of preparing of low residual stress aluminum alloy materials (5052 alloy), control aluminum alloy materials produce in casting process
The stress of raw inside, to the ingot casting demand of aluminum alloy plate materials when meeting the production of high-end equipment.
What the purpose of the present invention was realized by following technical solution:
A kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials, includes the following steps:
(1) melting: after igniting is completed in shove charge, when the fusing of furnace charge part, it is uniformly added into coverture, has just all been melted to furnace charge
Change, that is, be uniformly added into slagging agent, before aluminum alloy specimen refining, after being sufficiently stirred, sampling carries out constituent analysis and (uses
DF-100E direct-reading spectrometer), while controlling melting temperature range.
(2) refining is stood: gained melting sample is refined using N2+Cl2 method.
(3) online processing: gained refining stands addition refinement crystal grain, on-line filtration in sample and uses filter plate.
(4) casting technique: gained online processing sample is cast, and needs to control casting speed, ingot casting in casting technique
After carrying out high temperature soak, finished product is obtained.
A further improvement of the present invention is that: the coverture in the step (1) is uniformly added into 1 case (about 40kg), slag hitting
Agent is uniformly added into 1 case (about 40kg), and the range of sample smelting temperature is 710 DEG C~740 DEG C.
A further improvement of the present invention is that: the refining time in the step (2) about 20 minutes, pressure 0.6~
1.0MPa, 710 DEG C~740 DEG C of refining temperature, sample time of repose 20 minutes.
A further improvement of the present invention is that: the online degasification of the sample in the step (3) is removed using SDF birotor
The refinement crystal grain of gas, 300~400rpm of rotor speed, addition is Al-5Ti-B, using the twin-stage foamed ceramics of 30ppi+60ppi
Filter plate.
A further improvement of the present invention is that: sample is semi-continuous casting, cooling water pressure 150- in the step (4)
200Pa, the numerical value after reducing casting speed are 35-42mm/min, ingot casting thickness 510mm, the temperature 560 of ingot casting high temperature soak
~590 DEG C (general 5052 alloy soaking temperature is 550 DEG C).
A further improvement of the present invention is that: the aluminum alloy chemical composition are as follows: silicon (Si)≤0.1；Iron (Fe)≤0.2；
Copper (Cu): 0.05 ~ 0.1；Manganese (Mn): 0.06 ~ 0.1；Magnesium (Mg): 2.5 ~ 2.7；Chromium (Cr): 0.25 ~ 0.35；Zinc (Zn): 0.1；Titanium
(Ti): 0.005 ~ 0.01；Impurity≤0.15, surplus are aluminium (Al).
The beneficial effects of the present invention are: the content by controlling the element and impurity that form compound reduces Fe, Si
The ratio of content control Fe, Si.The transition elements such as Mn, Cr are added to, in order to inhibit to recrystallize and refine recrystal grain, are mentioned
High intensity prevents coarse intermetallic compound.Casting speed is reduced, cooling velocity is exactly reduced, makes ingot casting liquid point depth
It reduces, the Temperature Distribution of solid portion is more uniform, and the stress value for obtaining inside ingot reduces.Low speed casting, can also obtain
The tissue of big crystal grain tissue, ingot casting section gradient is more uniform.By high temperature soak, while eliminating macro-stress, eliminate brilliant
Interior segregation, chemical component is more evenly.For the production of subsequent plate, the influence of hereditary internal stress is eliminated.
Detailed description of the invention
Fig. 1 is yield strength, tensile strength, elongation percentage, residual stress measurement value, the residual stress abatement of aluminum alloy materials
Rate contrast table.
Specific embodiment
Below with reference to embodiment 1, embodiment 2 and embodiment 3, invention is further described in detail.
A kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials, includes the following steps:
Embodiment 1:
Melting is carried out first: after igniting is completed in shove charge, when the fusing of furnace charge part, being uniformly added into 1 case (about 40kg) coverture, to
Furnace charge just all melts, that is, is uniformly added into 1 case (about 40kg) and slagging agent is added, and before aluminum alloy specimen refining, carries out abundant
After stirring, sampling carries out constituent analysis (using DF-100E direct-reading spectrometer), while Control Assay smelting temperature is 725 DEG C；So
Sample is carried out refining standing afterwards: gained melting sample is refined using N2+Cl2 method, and refining time about 20 minutes, pressure
0.8MPa, 725 DEG C of refining temperature, sample time of repose 20 minutes；By online processing: the online degasification of sample is bis- using SDF
Rotor degasification, rotor speed 350rpm, the refinement crystal grain of addition are Al-5Ti-B, are made pottery using the twin-stage foam of 30ppi+60ppi
Porcelain filter plate；Finally carry out casting technique: gained online processing sample is cast, and sample is semi-continuous casting, cooling
Hydraulic pressure 175Pa, the numerical value after reducing casting speed are 38.5mm/min, ingot casting thickness 510mm, the temperature of ingot casting high temperature soak
575 DEG C (general 5052 alloy soaking temperature is 550 DEG C).Yield strength, the tension of the present embodiment treated aluminum alloy materials
Intensity, elongation percentage, residual stress measurement value, residual stress cut rate are shown in Fig. 1.
Aluminum alloy chemical composition in above-mentioned technique are as follows: silicon (Si) 0.05；Iron (Fe) 0.2；Copper (Cu): 0.05；Manganese
(Mn): 0.08；Magnesium (Mg): 2.5；Chromium (Cr): 0.25；Zinc (Zn): 0.1；Titanium (Ti): 0.005；Impurity≤0.15, surplus are aluminium
(Al)。
Embodiment 2:
Melting is carried out first: after igniting is completed in shove charge, when the fusing of furnace charge part, being uniformly added into 1 case (about 40kg) coverture, to
Furnace charge just all melts, that is, is uniformly added into 1 case (about 40kg) and slagging agent is added, and before aluminum alloy specimen refining, carries out abundant
After stirring, sampling carries out constituent analysis (using DF-100E direct-reading spectrometer), while Control Assay smelting temperature is 710 DEG C；So
Sample is carried out refining standing afterwards: gained melting sample is refined using N2+Cl2 method, and refining time about 20 minutes, pressure
0.6MPa, 710 DEG C of refining temperature, sample time of repose 20 minutes；By online processing: the online degasification of sample is bis- using SDF
Rotor degasification, rotor speed 300rpm, the refinement crystal grain of addition are Al-5Ti-B, are made pottery using the twin-stage foam of 30ppi+60ppi
Porcelain filter plate；Finally carry out casting technique: gained online processing sample is cast, and sample is semi-continuous casting, cooling
Hydraulic pressure 150Pa, the numerical value after reducing casting speed are 35mm/min, ingot casting thickness 510mm, the temperature of ingot casting high temperature soak
560 DEG C (general 5052 alloy soaking temperature is 550 DEG C).Yield strength, the tension of the present embodiment treated aluminum alloy materials
Intensity, elongation percentage, residual stress measurement value, residual stress cut rate are shown in Table 1.
Aluminum alloy chemical composition in above-mentioned technique are as follows: strontium (Si) 0.1；Iron (Fe) 0.2；Copper (Cu): 0.1；Manganese (Mn):
0.06；Magnesium (Mg): 2.7；Chromium (Cr): 0.35；Zinc (Zn): 0.1；Antimony (Ti): 0.01；Impurity≤0.15, surplus are aluminium
(Al)。
Embodiment 3:
Melting is carried out first: after igniting is completed in shove charge, when the fusing of furnace charge part, being uniformly added into 1 case (about 40kg) coverture, to
Furnace charge just all melts, that is, is uniformly added into 1 case (about 40kg) and slagging agent is added, and before aluminum alloy specimen refining, carries out abundant
After stirring, sampling carries out constituent analysis (using DF-100E direct-reading spectrometer), while Control Assay smelting temperature is 740 DEG C；So
Sample is carried out refining standing afterwards: gained melting sample is refined using N2+Cl2 method, and refining time about 20 minutes, pressure
1.0MPa, 740 DEG C of refining temperature, sample time of repose 20 minutes；By online processing: the online degasification of sample is bis- using SDF
Rotor degasification, rotor speed 400rpm, the refinement crystal grain of addition are Al-5Ti-B, are made pottery using the twin-stage foam of 30ppi+60ppi
Porcelain filter plate；Finally carry out casting technique: gained online processing sample is cast, and sample is semi-continuous casting, cooling
Hydraulic pressure 200Pa, the numerical value after reducing casting speed are 42mm/min, ingot casting thickness 510mm, the temperature of ingot casting high temperature soak
590 DEG C (general 5052 alloy soaking temperature is 550 DEG C).Yield strength, the tension of the present embodiment treated aluminum alloy materials
Intensity, elongation percentage, residual stress measurement value, residual stress cut rate are shown in Table 1.
Aluminum alloy chemical composition in above-mentioned technique are as follows: strontium (Si) 0.1；Iron (Fe) 0.2；Copper (Cu): 0.06；Manganese (Mn):
0.1；Magnesium (Mg): 2.6；Chromium (Cr): 0.3；Zinc (Zn): 0.1；Antimony (Ti): 0.006；Impurity≤0.15, surplus are aluminium (Al).
The beneficial effects of the present invention are: the content by controlling the element and impurity that form compound reduces Fe, Si
The ratio of content control Fe, Si.The transition elements such as Mn, Cr are added to, in order to inhibit to recrystallize and refine recrystal grain, are mentioned
High intensity prevents coarse intermetallic compound.Casting speed is reduced, cooling velocity is exactly reduced, makes ingot casting liquid point depth
It reduces, the Temperature Distribution of solid portion is more uniform, and the stress value for obtaining inside ingot reduces.Low speed casting, can also obtain
The tissue of big crystal grain tissue, ingot casting section gradient is more uniform.By high temperature soak, while eliminating macro-stress, eliminate brilliant
Interior segregation, chemical component is more evenly.For the production of subsequent plate, the influence of hereditary internal stress is eliminated.
The yield strength of aluminum alloy materials after embodiment 1, embodiment 2, the process of embodiment 3, is prolonged at tensile strength
It stretches rate, residual stress measurement value, residual stress cut rate contrast table and sees Fig. 1.
The above-mentioned implementation enumerated is only to illustration of the present invention, is not restriction made for the present invention.The present invention is also
It can be implemented using other way, herein not redundant one by one.All technical solutions formed using equivalent replacement or transformation,
Belong to the present invention claims protection scope.
Claims (6)
1. a kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials, which is characterized in that include the following steps:
(1) melting: after igniting is completed in shove charge, when the fusing of furnace charge part, it is uniformly added into coverture, has just all been melted to furnace charge
Change, that is, be uniformly added into slagging agent, before aluminum alloy specimen refining, after being sufficiently stirred, sampling carries out constituent analysis and (uses
DF-100E direct-reading spectrometer), while controlling melting temperature range；
(2) refining is stood: gained melting sample is refined using N2+Cl2 method；
(3) online processing: gained refining stands addition refinement crystal grain, on-line filtration in sample and uses filter plate；
(4) cast: gained online processing sample is cast, and needs to control casting speed in casting technique, and ingot casting carries out high temperature
After soaking, finished product is obtained.
2. a kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials according to claim 1, feature
Be: the coverture in the step (1) is uniformly added into 1 case (about 40kg), and slagging agent is uniformly added into 1 case (about 40kg), sample
The range of smelting temperature is 710 DEG C~740 DEG C.
3. a kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials according to claim 1, feature
It is: the refining time in the step (2) about 20 minutes, 0.6~1.0MPa of pressure, 710 DEG C~740 DEG C of refining temperature, examination
Sample time of repose 20 minutes.
4. a kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials according to claim 1, feature
Be: the online degasification of the sample in the step (3) uses the degasification of SDF birotor, 300~400rpm of rotor speed, addition
Refinement crystal grain be Al-5Ti-B, using 30ppi+60ppi twin-stage foamed ceramic filter plate filter.
5. a kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials according to claim 1, feature
Be: in the step (4) sample be semi-continuous casting, cooling water pressure 150-200Pa, reduce casting speed after numerical value be
35-42mm/min, ingot casting thickness 510mm, 560~590 DEG C of temperature (the general 5052 alloy soaking temperature of ingot casting high temperature soak
It is 550 DEG C).
6. a kind of ingot casting process of preparing of ultra-low residue stress aluminum alloy materials according to claim 1, feature
It is: the aluminum alloy chemical composition are as follows: silicon (Si)≤0.1；Iron (Fe)≤0.2；Copper (Cu): 0.05 ~ 0.1；Manganese (Mn):
0.06~0.1；Magnesium (Mg): 2.5 ~ 2.7；Chromium (Cr): 0.25 ~ 0.35；Zinc (Zn): 0.1；Titanium (Ti): 0.005 ~ 0.01；Impurity≤
0.15, surplus is aluminium (Al).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113862534A (en) * | 2021-10-08 | 2021-12-31 | 上海交通大学 | Method for regulating and controlling tissue inheritance of aluminum alloy material and method for preparing 7085 aluminum alloy thick plate |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103008342A (en) * | 2012-12-27 | 2013-04-03 | 亚洲铝业（中国）有限公司 | Production method of 5052-H32 aluminum alloy plate-strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113862534A (en) * | 2021-10-08 | 2021-12-31 | 上海交通大学 | Method for regulating and controlling tissue inheritance of aluminum alloy material and method for preparing 7085 aluminum alloy thick plate |
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Application publication date: 20190507 |