CN107675107A - A kind of aluminium shell - Google Patents
A kind of aluminium shell Download PDFInfo
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- CN107675107A CN107675107A CN201711171036.6A CN201711171036A CN107675107A CN 107675107 A CN107675107 A CN 107675107A CN 201711171036 A CN201711171036 A CN 201711171036A CN 107675107 A CN107675107 A CN 107675107A
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- aluminium shell
- aluminum alloy
- carbon fiber
- short carbon
- temperature
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/08—Making alloys containing metallic or non-metallic fibres or filaments by contacting the fibres or filaments with molten metal, e.g. by infiltrating the fibres or filaments placed in a mould
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/02—Pretreatment of the fibres or filaments
- C22C47/04—Pretreatment of the fibres or filaments by coating, e.g. with a protective or activated covering
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/04—Light metals
- C22C49/06—Aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
Abstract
The present invention relates to a kind of aluminium shell, and in particular to a kind of reductor aluminium shell, belongs to aluminum products Material Field.Reductor aluminium shell of the present invention is made up of aluminum alloy materials, and the aluminum alloy materials include the component of following mass percent：Si：7.0 7.5%, Mg：0.5 0.8%, Cu：0.2 0.5%, Sr：0 0.06%, Ti：0.15 0.20%, short carbon fiber：0.2 0.25%, surplus Al.Reductor aluminium shell of the present invention adds the short carbon fiber of surface covering aluminum oxide coating in aluminum alloy materials, it is possible to increase the intensity of obtained aluminium shell；Meanwhile reductor aluminium shell of the present invention adds Al in preparation process3BC intermediate alloys, can refining aluminum alloy crystal grain, improve the mechanical property of alloy, particularly improve made from reductor aluminium shell plasticity and toughness.
Description
Invention field
The present invention relates to a kind of aluminium shell, belongs to aluminum products Material Field.
Background technology
Aluminium alloy is most widely used a kind of non-ferrous metal structural material in industry, especially in automobile, ship, aviation boat
There is extensive application in the field such as it.Aluminium alloy density is low, but intensity is high, can be near or above high-quality steel, and can be processed into
Various section bars, there is excellent conduction, heat conduction and corrosion resisting property.Using various shells made of aluminum alloy materials, because of processing side
Just, flexibility is high and class is high, can effectively lift the additional properties of product.Meanwhile aluminum alloy casing intensity is high, corrosion resisting property
It is good, internal instrument can be protected to be not affected or less affected by damage, so as to prolonged mechanical service life, enhancing mechanical performance.In automobile industry,
Especially in reductor, engine, speed changer, aluminum alloy casing plays very important effect.But because various apparatuses make
During, violent vibrations and friction are had, cause connection between each structure inside apparatus built on the sand, and influence
The service life of each element in apparatus.
The content of the invention
The present invention is in view of the above-mentioned problems existing in the prior art, it is proposed that a kind of material is reliable, intensity is high, the aluminium of rub resistance
Shell processed.
The above-mentioned purpose of the present invention is realized by following technical solution：A kind of aluminium shell, the aluminium shell is by aluminium
Alloy material is made, and the aluminum alloy materials include the component of following mass percent：Si：7.0-7.5%, Mg：0.5-
0.8%, Cu：0.2-0.5%, Sr：0-0.06%, Ti：0.15-0.20%, short carbon fiber：0.2-0.25%, surplus Al.
In aluminium shell of the present invention, Si content is 7.0-7.5%, adds Si in the present invention, can drop low-alloyed
Hot cracking tendency, reduction is loose, improves air-tightness, alloy casting character can be substantially improved by carrying high Si content.According to liquid metal
Mechanism of cessation flow understands that when alloy graining, its crystallization range is wider, and dendrite is more flourishing, and solid liquid interface leading portion is just
Relatively small number of solid phase can be separated out, liquid will stop flowing in the short period of time, Si quality in hypoeutectic al-si alloy
Fraction be no more than 7.5%, when Si containing measure it is on the upper side in limited time, its crystallization range is narrower, be advantageous to improve its mobility.
And the addition of Mg elements can form hardening constituent Mg with Si2Si.With the increase of Mg contents, the tensile strength of alloy and
Yield strength all increases, and plasticity then declines with the increase of Mg contents.It is while important in Mg or Alar
Intensified element.During as cast condition, Mg mainly exists in addition to α (Al) matrix is solid-solution on a small quantity with larger-size Mg-Si phases.Cause
This, influence unobvious of the Mg to alloy casting state mechanical property, but after heat treatment, Mg invigoration effect is apparent.At solid solution
During reason, Mg dissolves in α (Al) matrix, with M during timeliness2Si phase disperse educts, make alloy strengthening.
Cu is the main alloy element of high-strength aluminum alloy, and it can improve the spread of precipitated phase, improves intergranular structure, such as
Grain boundary precipitate, crystal boundary improve along brilliant corrosive nature without Precipitation band.The higher alloy microscopic structure of amount containing Cu is finer and close,
And higher Cu contents always cause higher hardness.Therefore the Cu elements of above-mentioned content are added in the present invention.
In metallic element, Sc is best to the combination property effect for improving high strength alumin ium alloy.Sc be both magnesium-yttrium-transition metal again
It is rare earth metal.Sc can purify alloy, refined cast structure, the recrystallization for suppressing alloy, after Ageing Treatment, shape in alloy
Into Al3Sc coherent precipitates have strong pinning effect with respect to crystal grain and crystal boundary, there is extremely strong strong reinforcing effect to alloy, because
This, Sc can significantly improve the combination properties such as intensity, toughness, corrosion resistance and the heat resistance of alloy.
Zr elements are also commonly used for the microalloying of aluminium alloy.Zr directly separates out the A1 of tetragonal in alloy graining3Zr
Phase, refined cast structure；The Al that Zr is separated out during homogenization3Zr disperse phases can suppress to recrystallize.Numerous studies table
It is bright, compound addition Sc and Zr elements, polynary disperse phase A1 can be generated3(Sc, Zr) particle, it is not easy to grow up at high temperature, to suppression
System recrystallization, raising alloy high-temp intensity and toughness have positive effect.
In aluminium shell of the present invention, be also added into short carbon fiber in aluminum alloy materials, carbon fiber have high specific strength,
The excellent combination properties such as high ratio modulus, high temperature resistant, corrosion-resistant, conductive, heat conduction, low bulk and self-lubricating, and it is fine with continuous carbon
Dimension is compared, and short carbon fiber has the advantages that composite property isotropism, therefore short carbon is added in aluminium shell of the present invention
Fiber, the intensity of obtained decelerator shell can be increased.
Preferably, in aluminium shell of the present invention, the short carbon fiber is the short carbon fiber of surface covering aluminum oxide coating,
The present invention clean interfaces in aluminum oxide coating layer composite, is well combined by the covering aluminum oxide coating on short carbon fiber,
And aluminum oxide and fiber, with the reactionless generation of aluminium, can not only protect short carbon fiber, and obtained aluminium shell have it is excellent
Mechanical property.The short carbon fiber of the surface covering aluminum oxide coating is prepared by sol-gal process, the preparation method
Comprise the following steps：The short carbon fiber is prepared by sol-gal process, is specifically included：Will be short using continuous dipping process
Carbon fiber immerses glue, is heat-treated in a nitrogen atmosphere with 650-700 DEG C after drying, obtains surface covering aluminum oxide coating
Short carbon fiber；Wherein, described glue is using aluminium isopropoxide as presoma, and concentrated nitric acid is peptizing agent, and deionized water is solvent,
Hydrolysis stands what is obtained.
It is another object of the present invention to provide a kind of preparation method of above-mentioned aluminium shell, the preparation method includes
Following steps：
Addition prepares the composition of aluminum alloy materials after graphite crucible is preheated；700-750 DEG C is warming up to, adds Al3In BC
Between after alloy insulation 30-40min obtain melt；Heat up again and add Al-10Sr alterants, be incubated；725-730 DEG C is cooled to, is made
Refined with high-purity argon gas rotating and puffing argon method, aluminium shell blank of casting to obtain of being skimmed after cooling；After blank is heat-treated
Obtain aluminium shell semi-finished product；Aluminium shell is post-processed to obtain aluminium shell finished product.
In a kind of above-mentioned preparation method of aluminium shell, Al3The addition of BC intermediate alloys is aluminum alloy materials quality
0.5-0.7%.The present invention adds Al in the preparation method of aluminium shell3BC intermediate alloys, B will form ternary with Al, Mn
Compound, make Al3BC transformations completely form Al8Mn5BxAnd A14C3Phase；A13BC develops the A1 of generation in the melt4C3It is mutually primary crystal
α-Mg provide heterogeneous forming core substrate.And soaking time makes A13BC is to A14C3Transformation it is more abundant so that Al3Closed among BC
The thinning effect of gold is more preferably.
In a kind of above-mentioned preparation method of aluminium shell, by adding Al-10Sr alterants, α in alloy can be improved
(Al) chemical potential of phase, the forming core and growth ability of α (Al) phase, can be changed by adding Sr alterant elements when strengthening eutectic freezing
The form and size of Eutectic Silicon in Al-Si Cast Alloys, the plasticity and toughness of the mechanical property of alloy, particularly aluminium shell made from raising can be improved.As
It is preferred that the addition of Al-10Sr alterants is the 0.2-0.25% of melt quality.
In a kind of above-mentioned preparation method of aluminium shell, the temperature for adding Al-10Sr alterants is 760-770 DEG C, is protected
The warm time is 30-40min.Addition alterant temperature is too low, then alterant can not be fully dispersed in melt；Add alterant
Temperature is too high, and the oxidization burning loss of Sr elements can be caused serious, metamorphism decline.Soaking time is too short, then alterant can not fill
Tap, which is touched, causes effect to decline；If soaking time is long, melt continuous air-breathing in insulating process can be caused, hydrogen content increases
Add so that the defects of stomata occurs in alloy.Therefore the present invention uses said temperature and soaking time.
In a kind of above-mentioned preparation method of aluminium shell, the heat treatment is retrogression heat treatment, the retrogression heat treatment
Specifically include four-stage：First stage：Temperature is 460-465 DEG C, time 1-1.5h；Second stage：Temperature is 125-130
DEG C, time 13-13.5h；Phase III：Temperature is 190-195 DEG C, time 10-12min；Fourth stage：Temperature is 125-
130 DEG C, time 13-13.5h.The present invention returns the formation of the thick discontinuous phase of stage crystal boundary in higher temperature in short-term, big
Tend to toughness and tenacity that is smooth, and then improving alloy in angle and low-angle boundary.
Compared with prior art, the invention has the advantages that：
1st, aluminium shell of the present invention adds the short carbon fiber of surface covering aluminum oxide coating, Neng Gouti in aluminum alloy materials
The intensity for the aluminium shell that height obtains；
2nd, aluminium shell of the present invention adds Al in preparation process3BC intermediate alloys, can refining aluminum alloy crystal grain, together
When, Al-10Sr alterants are added, the chemical potential of α in alloy (Al) phase can be improved, the forming core of α (Al) phase when strengthening eutectic freezing
And growth ability, it can change the form and size of Eutectic Silicon in Al-Si Cast Alloys by adding Sr alterant elements, the mechanical property of alloy can be improved, it is special
It is not the plasticity and toughness of aluminium shell made from raising；
3rd, aluminium shell of the present invention is by using the rational aluminum alloy materials of compatibility, and uses specific preparation method, energy
Aluminium shell material is reliable made from enough making, intensity is high, rub resistance, in the reductor that is particularly suitable for use in, engine, speed changer.
Embodiment
It is below the embodiment of the present invention, the present invention is further limited.
Embodiment 1
Addition prepares the composition of aluminum alloy materials after graphite crucible is preheated, wherein, the composition of aluminum alloy materials specifically wraps
Include the composition of following mass percent：Si：7.0%, Mg：0.5%, Cu：0.2%, Sr：0%, Ti：0.15%, short carbon fiber：
0.2%, surplus Al；700 DEG C are warming up to, adds the Al that quality is aluminum alloy materials quality 0.5%3It is incubated after BC intermediate alloys
30min obtains melt；760 DEG C are warming up to again, and adds the Al-10Sr alterants of melt quality 0.2%, are incubated 30min；It is cooled to
725 DEG C, refined using high-purity argon gas rotating and puffing argon method, aluminium shell blank of casting to obtain of being skimmed after cooling；Blank is carried out
Aluminium shell semi-finished product are obtained after heat treatment, wherein, it is heat-treated and specifically includes four ranks for retrogression heat treatment, the retrogression heat treatment
Section：First stage：Temperature is 460 DEG C, time 1h；Second stage：Temperature is 125 DEG C, time 13h；Phase III：Temperature
For 190 DEG C, time 10min；Fourth stage：Temperature is 125 DEG C, time 13h；Aluminium shell is post-processed to obtain aluminium
Shell finished product processed.
Embodiment 2
Addition prepares the composition of aluminum alloy materials after graphite crucible is preheated, wherein, the composition of aluminum alloy materials specifically wraps
Include the composition of following mass percent：Si：7.2%, Mg：0.6%, Cu：0.3%, Sr：0.02%, Ti：0.16%, short carbon is fine
Dimension：0.21%, surplus Al；710 DEG C are warming up to, adds the Al that quality is aluminum alloy materials quality 0.55%3BC intermediate alloys
Insulation 32min obtains melt afterwards；762 DEG C are warming up to again, and adds the Al-10Sr alterants of melt quality 0.21%, are incubated
32min；726 DEG C are cooled to, is refined using high-purity argon gas rotating and puffing argon method, aluminium shell base of casting to obtain of being skimmed after cooling
Part；Aluminium shell semi-finished product are obtained after blank is heat-treated, wherein, it is heat-treated as retrogression heat treatment, the retrogression heat treatment
Specifically include four-stage：First stage：Temperature is 461 DEG C, time 1.1h；Second stage：Temperature is 126 DEG C, and the time is
13.1h；Phase III：Temperature is 191 DEG C, time 11min；Fourth stage：Temperature is 126 DEG C, time 13.1h；By aluminium
Shell processed is post-processed to obtain aluminium shell finished product.
Embodiment 3
Addition prepares the composition of aluminum alloy materials after graphite crucible is preheated, wherein, the composition of aluminum alloy materials specifically wraps
Include the composition of following mass percent：Si：7.3%, Mg：0.65%, Cu：0.35%, Sr：0.03%, Ti：0.18%, short carbon
Fiber：0.23%, surplus Al；730 DEG C are warming up to, adds the Al that quality is aluminum alloy materials quality 0.6%3BC intermediate alloys
Insulation 35min obtains melt afterwards；765 DEG C are warming up to again, and adds the Al-10Sr alterants of melt quality 0.23%, are incubated
35min；727 DEG C are cooled to, is refined using high-purity argon gas rotating and puffing argon method, aluminium shell base of casting to obtain of being skimmed after cooling
Part；Aluminium shell semi-finished product are obtained after blank is heat-treated, wherein, it is heat-treated as retrogression heat treatment, the retrogression heat treatment
Specifically include four-stage：First stage：Temperature is 463 DEG C, time 1.3h；Second stage：Temperature is 128 DEG C, and the time is
13.3h；Phase III：Temperature is 193 DEG C, time 11min；Fourth stage：Temperature is 128 DEG C, time 13.3h；By aluminium
Shell processed is post-processed to obtain aluminium shell finished product.
Embodiment 4
Addition prepares the composition of aluminum alloy materials after graphite crucible is preheated, wherein, the composition of aluminum alloy materials specifically wraps
Include the composition of following mass percent：Si：7.4%, Mg：0.72%, Cu：0.42%, Sr：0.05%, Ti：0.19%, short carbon
Fiber：0.24%, surplus Al；740 DEG C are warming up to, adds the Al that quality is aluminum alloy materials quality 0.65%3Closed among BC
38min is incubated after gold and obtains melt；768 DEG C are warming up to again, and adds the Al-10Sr alterants of melt quality 0.24%, are incubated
38min；729 DEG C are cooled to, is refined using high-purity argon gas rotating and puffing argon method, aluminium shell base of casting to obtain of being skimmed after cooling
Part；Aluminium shell semi-finished product are obtained after blank is heat-treated, wherein, it is heat-treated as retrogression heat treatment, the retrogression heat treatment
Specifically include four-stage：First stage：Temperature is 464 DEG C, time 1.4h；Second stage：Temperature is 129 DEG C, and the time is
13.4h；Phase III：Temperature is 194 DEG C, time 11min；Fourth stage：Temperature is 129 DEG C, time 13.4h；By aluminium
Shell processed is post-processed to obtain aluminium shell finished product.
Embodiment 5
Addition prepares the composition of aluminum alloy materials after graphite crucible is preheated, wherein, the composition of aluminum alloy materials specifically wraps
Include the composition of following mass percent：Si：7.5%, Mg：0.8%, Cu：0.5%, Sr：0.06%, Ti：0.2%, short carbon is fine
Dimension：0.25%, surplus Al；750 DEG C are warming up to, adds the Al that quality is aluminum alloy materials quality 0.7%3After BC intermediate alloys
Insulation 40min obtains melt；770 DEG C are warming up to again, and adds the Al-10Sr alterants of melt quality 0.25%, are incubated 40min；
730 DEG C are cooled to, is refined using high-purity argon gas rotating and puffing argon method, aluminium shell blank of casting to obtain of being skimmed after cooling；By base
Part obtains aluminium shell semi-finished product after being heat-treated, wherein, it is heat-treated and is specifically included for retrogression heat treatment, the retrogression heat treatment
Four-stage：First stage：Temperature is 465 DEG C, time 1.5h；Second stage：Temperature is 130 DEG C, time 13.5h；The
Three stages：Temperature is 195 DEG C, time 12min；Fourth stage：Temperature is 130 DEG C, time 13.5h；Aluminium shell is entered
Row post processing obtains aluminium shell finished product.
Comparative example 1
With differing only in for embodiment 1, the comparative example aluminium shell is made of common commercially available aluminium alloy, other and reality
Apply that example 1 is identical, and here is omitted.
Comparative example 2
It is fine that short carbon is not contained in the aluminum alloy materials used with differing only in for embodiment 1, the comparative example aluminium shell
Dimension, other are same as Example 1, and here is omitted.
Comparative example 3
Short carbon fiber table in the aluminum alloy materials used with differing only in for embodiment 1, the comparative example aluminium shell
Face does not have covering aluminum oxide coating, and other are same as Example 1, and here is omitted.
Comparative example 4
With differing only in for embodiment 1, the comparative example aluminium shell is in preparation process without addition Al3Closed among BC
Gold, other are same as Example 1, and here is omitted.
Comparative example 5
With differing only in for embodiment 1, the comparative example aluminium shell goes bad in preparation process without addition Al-10Sr
Agent, other are same as Example 1, and here is omitted.
Aluminium shell in embodiment 1-5 and comparative example 1-5 is subjected to performance detection, testing result is as shown in table 1.
Table 1：Aluminium shell test result in embodiment 1-5 and comparative example 1-5
As can be seen from the above results, aluminium shell of the present invention adds Al in preparation process3BC intermediate alloys, Neng Gouxi
Change aluminium alloy crystal grain, meanwhile, Al-10Sr alterants are added, the chemical potential of α in alloy (Al) phase can be improved, strengthen eutectic freezing
When α (Al) phase forming core and growth ability, can change the form and size of Eutectic Silicon in Al-Si Cast Alloys by adding Sr alterant elements, conjunction can be improved
The plasticity and toughness of the mechanical property of gold, particularly aluminium shell made from raising, the reductor that is particularly suitable for use in, engine, speed changer
In.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but simultaneously
Do not deviate by the spirit of the present invention or surmount scope defined in appended claims.
It is skilled to this area although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (8)
1. a kind of aluminium shell, it is characterised in that the aluminium shell is made up of aluminum alloy materials, and the aluminum alloy materials include
The component of following mass percent：Si：7.0-7.5%, Mg：0.5-0.8%, Cu：0.2-0.5%, Sr：0-0.06%, Ti：
0.15-0.20%, short carbon fiber：0.2-0.25%, surplus Al；Wherein, the short carbon fiber applies for surface coating alumina
The short carbon fiber of layer.
2. a kind of aluminium shell according to claim 1, it is characterised in that the short carbon fiber passes through collosol and gel legal system
It is standby to form, specifically include：Short carbon fiber is immersed by glue using continuous dipping process, after drying in a nitrogen atmosphere and 650-
It is heat-treated at 700 DEG C, obtains the short carbon fiber of surface covering aluminum oxide coating.
3. a kind of aluminium shell according to claim 2, it is characterised in that described glue is using aluminium isopropoxide as forerunner
Body, concentrated nitric acid are peptizing agent, and deionized water is solvent, and hydrolysis stands what is obtained.
4. a kind of preparation method of aluminium shell as claimed in claim 1, it is characterised in that the preparation method includes as follows
Step：Addition prepares the composition of aluminum alloy materials after graphite crucible is preheated；700-750 DEG C is warming up to, adds Al3Closed among BC
30-40min is incubated after gold and obtains melt；Heat up again and add Al-10Sr alterants, be incubated；725-730 DEG C is cooled to, refines, take off
Slag is cast to obtain aluminium shell blank；Aluminium shell semi-finished product are obtained after blank is heat-treated；Aluminium shell is post-processed
Obtain aluminium shell finished product.
5. the preparation method of aluminium shell according to claim 4, it is characterised in that the Al3The addition of BC intermediate alloys
Measure as the 0.5-0.7% of aluminum alloy materials quality.
6. the preparation method of aluminium shell according to claim 4, it is characterised in that the Al-10Sr alterants add
Enter the 0.2-0.25% that amount is melt quality.
7. the preparation method of aluminium shell according to claim 4, it is characterised in that add the temperature of Al-10Sr alterants
Spend for 760-770 DEG C, soaking time 30-40min.
8. the preparation method of aluminium shell according to claim 4, it is characterised in that the heat treatment is at relapsing fever
Reason, the retrogression heat treatment specifically include four-stage：First stage：Temperature is 460-465 DEG C, time 1-1.5h；Second
Stage：Temperature is 125-130 DEG C, time 13-13.5h；Phase III：Temperature is 190-195 DEG C, time 10-12min；
Fourth stage：Temperature is 125-130 DEG C, time 13-13.5h.
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| CN201711171036.6A CN107675107A (en) | 2017-11-22 | 2017-11-22 | A kind of aluminium shell |
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| CN201711171036.6A CN107675107A (en) | 2017-11-22 | 2017-11-22 | A kind of aluminium shell |
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| CN105200272A (en) * | 2015-10-14 | 2015-12-30 | 江苏大学 | Extrusion casting method for wrought aluminum alloy lampshade |
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