CN116005042A - Aluminum-manganese alloy extrusion material and preparation method and application thereof - Google Patents
Aluminum-manganese alloy extrusion material and preparation method and application thereof Download PDFInfo
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- 238000001125 extrusion Methods 0.000 title claims abstract description 78
- 239000000463 material Substances 0.000 title claims abstract description 51
- -1 Aluminum-manganese Chemical compound 0.000 title claims abstract description 43
- 229910000914 Mn alloy Inorganic materials 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- 239000011572 manganese Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000000265 homogenisation Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 229910000765 intermetallic Inorganic materials 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 238000009749 continuous casting Methods 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 229910001152 Bi alloy Inorganic materials 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 239000007858 starting material Substances 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 239000000956 alloy Substances 0.000 abstract description 48
- 229910045601 alloy Inorganic materials 0.000 abstract description 46
- 238000012545 processing Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 238000010586 diagram Methods 0.000 description 13
- 229910052742 iron Inorganic materials 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 5
- 238000005204 segregation Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 4
- 239000011257 shell material Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910018131 Al-Mn Inorganic materials 0.000 description 2
- 229910018461 Al—Mn Inorganic materials 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910015136 FeMn Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 239000010419 fine particle Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 238000011056 performance test Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses an aluminum-manganese alloy extrusion material, a preparation method and application thereof, and belongs to the technical field of alloys. The aluminum-manganese alloy extrusion material comprises the following components in percentage by mass: mn:1.0-1.4%, si:0.2-0.3%, cu:0.08-0.12%, mg:0.01-0.03%, ti:0.01-0.05%, fe:0.25-0.85%, bi:0.05-0.1%, zr:0.05-0.1%, the sum of unavoidable impurities is less than or equal to 0.15%, the balance is Al, and Mg: bi=0.1 to 0.17; the Fe+Mn is more than or equal to 1.5% and less than or equal to 2.0%, and the aluminum-manganese alloy extrusion material prepared by adopting the specific composition and the processing technology has higher strength and better plasticity than 3003 alloy, and is expected to replace 3003 alloy to become a main material for manufacturing the power battery shell of the new energy automobile.
Description
Technical Field
The invention relates to the technical field of alloys, in particular to an aluminum-manganese alloy extrusion material, a preparation method and application thereof.
Background
The 3003 alloy is a common Al-Mn alloy, has good deformation processing forming property, heat conducting property and corrosion resistance, and is currently a main material for manufacturing the power battery shell of the new energy automobile. The weight of the power battery assembly accounts for 20-30% of the weight of the whole vehicle, and in order to lighten the weight of the battery and improve the endurance mileage, the thickness of the aluminum alloy battery shell is thinner and thinner. In order to ensure the deformation processing forming performance and the collision safety performance of the power battery, the requirements on the mechanical properties such as O-state plasticity, H14-state strength, plasticity and the like of the aluminum alloy material for the battery case are higher than those of the conventional 3003 aluminum alloy.
In view of the foregoing, there is a need for a new aluminum-manganese alloy extrusion, and a method for preparing and using the same.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an aluminum-manganese alloy extrusion material, a preparation method and application thereof.
The invention solves the technical problems by adopting the following technical scheme.
The invention provides an aluminum-manganese alloy extrusion material, which comprises the following components in percentage by mass: mn:1.0-1.4%, si:0.2-0.3%, cu:0.08-0.12%, mg:0.01-0.03%, ti:0.01-0.05%, fe:0.25-0.85%, bi:0.05-0.1%, zr:0.05-0.1%, the sum of unavoidable impurities is less than or equal to 0.15%, the balance is Al, and Mg: bi=0.1 to 0.17; fe+Mn is more than or equal to 1.5% and less than or equal to 2.0%.
The invention also provides a preparation method of the aluminum-manganese alloy extrusion material, which comprises the following steps: smelting raw materials into cast ingots according to the composition and mass percent of the aluminum-manganese alloy extrusion material, and then carrying out homogenization heat treatment and extrusion treatment.
The invention also provides an application of the aluminum-manganese alloy extrusion material in manufacturing a power battery shell material.
The invention has the following beneficial effects:
the invention provides an aluminum-manganese alloy extrusion material and a preparation method thereofThe method and the application provide an aluminum-manganese alloy extrusion material which comprises the following components in percentage by mass: mn:1.0-1.4%, si:0.2-0.3%, cu:0.08-0.12%, mg:0.01-0.03%, ti:0.01-0.05%, fe:0.25-0.85%, bi:0.05-0.1%, zr:0.05-0.1%, the sum of unavoidable impurities is less than or equal to 0.15%, the balance is Al, and Mg: bi=0.1 to 0.17; fe+Mn is more than or equal to 1.5% and less than or equal to 2.0%, and the nano-scale Mg is generated by microalloying by adding Bi 3 Bi 2 The precipitated phase plays a role in pinning dislocation and subgrain boundary in the deformation process, so that the strength of the alloy is obviously improved, meanwhile, fe is used as a beneficial element, and the alloy adopts the proportion of high iron content, so that the requirement on raw materials is reduced, and the cost of the raw materials is reduced. The Fe element can also lighten the grain segregation of Mn element, and the microstructure is comprehensively regulated and controlled by adding microelements such as Bi, zr, ti and the like, so that the formation of coarse intermetallic compounds is avoided, the recrystallization temperature of the material is improved, the formation of coarse recrystallization structure after extrusion is inhibited, and the strength, the toughness and the yield of the extruded material are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram (magnification 2000) of an as-cast metallographic structure of the alloy provided in example 1;
FIG. 2 is a drawing (magnification 10000 times) of an as-cast metallographic structure of the alloy provided in example 1;
FIG. 3 is a metallographic structure diagram (500 times magnification) of the homogenized alloy state provided in example 1;
FIG. 4 is a metallographic structure diagram (magnification: 5000 times) of the homogenized alloy state provided in example 1;
FIG. 5 is a metallographic structure (500 times magnification) of the alloy provided in example 1 after extrusion;
FIG. 6 is a metallographic structure (magnification 5000 times) of the alloy provided in example 1 after extrusion;
FIG. 7 is a metallographic structure diagram (magnification 20000 times) of the alloy provided in example 1 after extrusion;
fig. 8 is a metallographic structure diagram (magnification 20000 times) of the alloy provided in example 1 after extrusion.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The embodiment of the invention provides an aluminum-manganese alloy extrusion material, a preparation method and application thereof, and the provided aluminum-manganese alloy extrusion material is an Al-Mn alloy material and an extrusion material with higher strength and plasticity than 3003 alloy.
The embodiment of the invention provides an aluminum-manganese alloy extrusion material, and a preparation method and application thereof.
In a first aspect, an embodiment of the present invention provides an aluminum-manganese alloy extrusion material, including the following components in percentage by mass: mn:1.0-1.4%, si:0.2-0.3%, cu:0.08-0.12%, mg:0.01-0.03%, ti:0.01-0.05%, fe:0.25-0.85%, bi:0.05-0.1%, zr:0.05-0.1%, the sum of unavoidable impurities is less than or equal to 0.15%, the balance is Al, and Mg: bi=0.1 to 0.17; fe+Mn is more than or equal to 1.5% and less than or equal to 2.0%.
The embodiment of the invention provides an aluminum-manganese alloy extrusion material, which comprises the following components: mn, si, cu, mg, ti, fe, bi, zr and Al, wherein:
mn plays a solid solution strengthening role, and can raise the recrystallization temperature of the alloy and avoid forming a coarse recrystallization structure during extrusion. The Mn content is too high, serious intracrystalline segregation is formed, a long-time homogenization heat treatment is required, a coarse grain structure is easily formed during extrusion, and the alloy strength and plasticity are reduced.
Fe can reduce Mn inThe solid solubility in aluminum reduces the segregation in Mn element crystal and can refine the casting structure. The total content of Fe and Mn needs to be controlled to be 1.5% -2.0%, for example, the content of Fe and Mn is too high, coarse Al can be generated 6 (FeMn) compound, reduce the mechanical property and yield of the extruded material;
si plays a role in improving the casting performance of the alloy and avoiding die sticking during extrusion. The Si content is too high, coarse AlFeMnSi compounds are formed, and the plasticity of the alloy is reduced.
The Cu element can improve the tensile strength of the alloy and improve the corrosion resistance of the alloy. However, when the Cu content exceeds 0.1%, the deformation resistance of the alloy increases and the plasticity decreases.
The Mg element reacts with Bi to generate nano-scale Mg 3 Bi 2 Can pin dislocation and sub-crystal structure to play the role of precipitation strengthening. If the ratio of Mg element to Bi is less than 0.1, the alloy contains excessive Bi, and the structure is liable to be over-burned during homogenization or extrusion. If the ratio of Mg element to Bi is higher than 0.17, excessive Mg is generated 2 Si compound reduces the elongation of the alloy and affects the welding performance of the material, resulting in reduced weld strength.
Bi element reacts with Mg to generate Mg 3 Bi 2 By retaining a certain amount of excessive nano-scale Bi, the alloy is prepared for Al (Fe, mn) Si and Al 6 The hard and brittle phases such as (Fe, mn) play a role in refining, so that the hard and brittle phases form fine and dispersed precipitated phases at crystal boundaries, thereby reducing adverse effects of Fe and Si and obviously improving the plasticity of the material.
Ti forms Al in the alloy 3 Ti particles play a role in refining alpha-Al.
Zr can form Al with Al 3 Zr prevents the formation of a coarse recrystallized structure during extrusion of the alloy.
In a second aspect, an embodiment of the present invention provides a method for preparing an aluminum-manganese alloy extrusion material, including: and casting the raw materials into cast ingots according to the composition and mass percent of the aluminum-manganese alloy extrusion material, and then carrying out homogenization heat treatment and extrusion treatment.
In an alternative embodiment, the raw materials are cast into ingots using a vertical semi-continuous casting process.
In an alternative embodiment, the method further comprises: and adding Bi or Bi alloy wires into the aluminum melt body at the position of the launder outside the smelting furnace in a wire feeding mode by a wire feeder.
In an alternative embodiment, the cooling rate of the ingot is controlled to be 10-20 ℃ per second so that the ingot grain size is less than 25 μm and the intermetallic size at the grain boundaries is less than 3 μm.
In an alternative embodiment, the homogenization heat treatment is: raising the temperature of the cast ingot to 580-625 ℃, preserving heat for 8-12h, and then discharging from the furnace for air cooling.
In an alternative embodiment, the homogenization heat treatment has a ramp rate of 10-15 deg.C/min.
In an alternative embodiment, the average size of the precipitated phase of the aluminum-manganese alloy ingot is made smaller than 2 μm by homogenization heat treatment.
In an alternative embodiment, the extrusion treatment is to saw cut the cast ingot into extrusion blanks and then extrude the extrusion blanks;
preferably, the temperature of the extrusion blank is controlled to be 450-500 ℃, the deformation of the extrusion blank is less than or equal to 96%, the outlet temperature of the extrusion barrel is lower than 530 ℃, and the thickness of the extrusion material is 0.3-1mm.
In a third aspect, embodiments of the present invention provide an application of an aluminum-manganese alloy extrusion material as a material for manufacturing a power battery case.
The features and capabilities of the present invention are described in further detail below with reference to examples.
The embodiment of the invention provides an aluminum-manganese alloy extrusion material, and a preparation method and application thereof.
The aluminum-manganese alloy extrusion material provided by the embodiment of the invention comprises the following chemical components in percentage by mass: mn:1.0-1.4%, si:0.2-0.3%, cu:0.08-0.12%, mg:0.01-0.03%, ti:0.01-0.05%, fe:0.25-0.85%, bi:0.05-0.1%, zr:0.05-0.1%, the sum of unavoidable impurities is less than or equal to 0.15%, and the balance is Al. Wherein, mg: bi=0.1 to 0.17; fe+Mn is more than or equal to 1.5% and less than or equal to 2.0%.
The preparation method of the aluminum-manganese alloy extrusion material comprises the following steps:
step one: semi-continuous casting
The raw materials are proportioned according to the composition and the mass percentage of the aluminum alloy, and are cast into round bars by adopting a vertical semi-continuous casting mode. Bi is easy to deposit at the bottom when directly added into a furnace due to high density, and is easy to volatilize when kept for a long time in the furnace. In order to ensure the Bi content in the alloy, the Bi or Bi alloy wires are added into an aluminum melt body in a mode of feeding wires by a wire feeder at the position of a launder.
The cooling speed of the round bar is controlled to be 10-20 ℃/s during casting, so that the grain size of the cast ingot is smaller than 25 mu m, and the intermetallic compound size on the grain boundary is smaller than 3 mu m. If the cooling rate is too high, the manganese element has serious intergranular segregation, needs to be homogenized for a long time, and is likely to form a coarse recrystallized structure during extrusion. The cooling rate is too low, and intermetallic compounds on the ingot grains and grain boundaries become coarse.
Step two: homogenization heat treatment of cast ingot
Manganese element has a low diffusion rate, and is solid-dissolved in a matrix in a supersaturated state during solidification, thereby generating intragranular segregation. Therefore, homogenization heat treatment is required before extrusion.
Homogenizing in a rapid heating mode at a heating rate of 10-15 deg.C/min. Heating to 580-625 deg.C, holding for 8-12 hr, discharging and air cooling to homogenize Al (Fe, mn) Si and Al 6 The average size of the precipitated phase such as (Fe, mn) is less than 2 μm.
Step three: extrusion
Sawing the cast ingot to obtain an extrusion blank. The extrusion temperature of the extrusion blank is 450-500 ℃, the deformation is less than or equal to 96%, the outlet temperature of the extrusion cylinder is lower than 530 ℃, and the thickness of the obtained extrusion material is 0.3-1mm.
The alloys having the compositions shown in Table 1 were cast into round ingots having a diameter of Φ127mm by semi-continuous casting. Homogenizing, and extruding with a forward extruder. Casting, homogenization and extrusion parameters are shown in table 2. The material number is 1-8, and the processing technology number is A-F.
Table 1 chemical composition of the alloy (%)
Table 2 processing technique
Experimental results:
the analysis of the spectrum of the micron-sized precipitated phase on the grain boundary was performed by scanning electron microscopy, and the results are shown in table 3 below:
TABLE 3 analysis of precipitated phase energy spectrum
Because the specks are larger when the energy spectrum is struck, not only are the precipitated phases struck, but also the matrix is struck, so the element proportions in the table 3 also contain the elements in the matrix. And simultaneously combining the basic composition, structure and X-ray diffraction analysis result of the alloy phase, the composition of the precipitated phase of the obtained aluminum-manganese alloy extrusion material mainly comprises Al (Fe, mn) Si and Al 6 (Fe, mn) and the like, and nano Bi element reacts with Mg element to generate Mg 3 Bi 2 Fine particles.
The appearance of the prepared aluminum-manganese alloy extrusion material is tested, and the result is as follows:
fig. 1 is a metallographic structure diagram (magnified 2000 times) of the alloy as-cast provided in example 1, and it can be seen that: the average grain size was about 16. Mu.m.
Fig. 2 is a metallographic structure diagram (magnified 10000 times) of the alloy as cast state provided in example 1, and it can be seen that: the intermetallic size of the cast rod is less than 3 μm when the cast rod is in an as-cast state.
Fig. 3 is a metallographic structure diagram (500 times enlarged) of the homogenized alloy provided in example 1, and it can be seen that: intermetallic compounds are uniformly distributed at grain boundaries.
Fig. 4 is a metallographic structure diagram (magnification 5000 times) of the homogenized alloy provided in example 1, and it can be seen that: the average size of intermetallic compounds at the grain boundaries is less than 2 μm.
Fig. 5 is a metallographic structure diagram (500 times enlarged) of the alloy provided in example 1 after extrusion, and it can be seen that: after extrusion, grain structure is refined.
Fig. 6 is a metallographic structure diagram (magnification 5000 times) of the alloy provided in example 1 after extrusion, and it can be seen that: the average size of the intermetallic compound is less than or equal to 2 microns.
Fig. 7 is a metallographic structure diagram (magnification 20000 times) of the alloy provided in example 1 after extrusion, and it can be seen that: in the figure, the white bright point is Bi, the bulk phase is AlFeMnSi compound, and the AlFeMnSi compound is converted into an approximate sphere under the action of nano Bi.
Fig. 8 is a metallographic structure diagram (magnification 20000 times) of the alloy provided in example 1 after extrusion, and it can be seen that: the alloy contains nano-scale Mg 3 Bi 2 And (3) phase (C).
The aluminum-manganese alloy extruded material prepared in the above way was subjected to performance test, wherein the test standard of tensile strength and yield strength is referred to GB/T16865-2013, the test standard of elongation after break is referred to GB/T16865-2013, and the test standard of hardness is referred to GB/T231.1-2018, and the results are shown in Table 4.
TABLE 4 Properties of aluminum manganese alloy extrudates
As can be seen from table 4 above, the aluminum-manganese alloy extrusion material prepared by adopting the scheme provided by the embodiment of the invention has excellent performance, and the aluminum-manganese alloy extrusion material provided by the embodiment of the invention has better performance than 3003 alloy, and when the alloy composition is changed or the process conditions are different, the overall performance of the obtained aluminum-manganese alloy extrusion material is obviously reduced, so that the prepared aluminum-manganese alloy extrusion material has higher strength and better plasticity than 3003 alloy by adopting the specific composition and processing technology.
In summary, the embodiment of the invention provides an aluminum-manganese alloy extrusion material, a preparation method and application thereof, and the aluminum-manganese alloy extrusion material comprises the following components in percentage by mass: mn:1.0-1.4%, si:0.2-0.3%, cu:0.08-0.12%, mg:0.01-0.03%, ti:0.01-0.05%, fe:0.25-0.85%, bi:0.05-0.1%, zr:0.05-0.1%, the sum of unavoidable impurities is less than or equal to 0.15%, the balance is Al, and Mg: bi=0.1 to 0.17; fe+Mn is more than or equal to 1.5% and less than or equal to 2.0%, and the prepared aluminum-manganese alloy extrusion material has higher strength and better plasticity than 3003 alloy by adopting specific composition and processing technology, and is expected to replace 3003 alloy to become a main material for manufacturing a power battery shell of a new energy automobile.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The aluminum-manganese alloy extrusion material is characterized by comprising the following components in percentage by mass: mn:1.0-1.4%, si:0.2-0.3%, cu:0.08-0.12%, mg:0.01-0.03%, ti:0.01-0.05%, fe:0.25-0.85%, bi:0.05-0.1%, zr:0.05-0.1%, the sum of unavoidable impurities is less than or equal to 0.15%, the balance is Al, and Mg: bi=0.1 to 0.17; fe+Mn is more than or equal to 1.5% and less than or equal to 2.0%.
2. A method of producing the aluminum-manganese alloy extrusion as recited in claim 1, comprising: and casting the raw materials into cast ingots according to the composition and mass percent of the aluminum-manganese alloy extrusion material, and then carrying out homogenization heat treatment and extrusion treatment.
3. The method of claim 2, wherein the starting material is formed into ingots by vertical semi-continuous casting.
4. A method of preparing as claimed in claim 3, further comprising: and adding Bi or Bi alloy wires into the aluminum melt body at the position of the launder outside the smelting furnace in a wire feeding mode by a wire feeder.
5. A method of producing a steel sheet according to claim 3, wherein the cooling rate of the ingot is controlled at 10-20 ℃/s during casting so that the grain size of the ingot is less than 25 μm and the intermetallic compound size at the grain boundaries is less than 3 μm.
6. The method according to claim 2, wherein the homogenizing heat treatment is: raising the temperature of the cast ingot to 580-625 ℃, preserving heat for 8-12h, and then discharging from the furnace for air cooling.
7. The method according to claim 6, wherein the temperature rising rate of the homogenizing heat treatment is 10-15 ℃/min.
8. The method according to claim 6, wherein the average size of the precipitated phase of the aluminum-manganese alloy ingot is smaller than 2 μm by the homogenization heat treatment.
9. The method of manufacturing according to claim 2, wherein the extrusion process is: sawing the ingot after the homogenization heat treatment to form an extrusion blank, and extruding;
preferably, the temperature of the extrusion blank is controlled to be 450-500 ℃, the deformation of the extrusion blank is less than or equal to 96%, the outlet temperature of the extrusion barrel is lower than 530 ℃, and the thickness of the extrusion material is 0.3-1mm.
10. Use of the aluminium-manganese alloy extrudate according to claim 1 or the aluminium-manganese alloy extrudate prepared by the method according to any one of claims 2 to 9 as a material for the manufacture of power battery housings.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400807A (en) * | 2017-07-25 | 2017-11-28 | 杨仲彬 | A kind of power battery case aluminium alloy and its processing method |
| CN109158845A (en) * | 2018-08-13 | 2019-01-08 | 南宁市安和机械设备有限公司 | A kind of preparation method and automobile radiators of Ultrathin automobile radiating circular tube |
| CN115537590A (en) * | 2022-09-14 | 2022-12-30 | 山东裕航特种合金装备有限公司 | Preparation method of valve body material for automobile stamping |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400807A (en) * | 2017-07-25 | 2017-11-28 | 杨仲彬 | A kind of power battery case aluminium alloy and its processing method |
| CN109158845A (en) * | 2018-08-13 | 2019-01-08 | 南宁市安和机械设备有限公司 | A kind of preparation method and automobile radiators of Ultrathin automobile radiating circular tube |
| CN115537590A (en) * | 2022-09-14 | 2022-12-30 | 山东裕航特种合金装备有限公司 | Preparation method of valve body material for automobile stamping |
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