CN102312137B - Aluminum-silicon-magnesium Cast aluminium alloy gold and casting technique - Google Patents
Aluminum-silicon-magnesium Cast aluminium alloy gold and casting technique Download PDFInfo
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- CN102312137B CN102312137B CN201110267111.5A CN201110267111A CN102312137B CN 102312137 B CN102312137 B CN 102312137B CN 201110267111 A CN201110267111 A CN 201110267111A CN 102312137 B CN102312137 B CN 102312137B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
- C22C21/04—Modified aluminium-silicon alloys
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- 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 aluminum-silicon-magnesium Cast aluminium alloy gold and casting technique, this aluminium alloy component comprises the element of following mass percent: silicon 6.5-7.5；Magnesium 0.40-0.60；Titanium 0.10-0.30；Strontium 0.01-0.03；Ferrum≤0.20；Copper≤0.10；Zinc≤0.20；Manganese≤0.10；Beryllium≤0.01；Vanadium≤0.02；All the other are aluminum。Aluminum alloy casting technique includes: by A356.2 aluminium ingot shove charge melting；Add rotten material and carry out refine；Cast after standing the scheduled time；It is sequentially carried out solid solution, cooling, transfer and Ageing Treatment afterwards, instant invention overcomes Alar low strength, elongation percentage is on the low side, aluminum bronze system and aluminum zinc series alloy casting character and the poor deficiency of decay resistance, improve the tensile strength of aluminium alloy, toughness and casting character, cost is low, good corrosion resistance。
Description
Technical field
The present invention relates to aluminium alloy casting technology field, particularly relate to a kind of aluminum-silicon-magnesium Cast aluminium alloy gold with relatively high-tensile and elongation percentage comprehensive mechanical property and casting technique。
Background technology
Cast aluminium alloy gold is as traditional metal material, have that proportion is low, specific strength is high, easy processing, cost are low, heat dispersion and corrosion resistance and good, manufactured parts is flexibly, simply, it is easy to the features such as batch production, is widely used in the industries such as Aeronautics and Astronautics, automobile, machinery。Along with the development of modern industry, to Cast aluminium alloy gold, particularly increasing to having the demand golden compared with the Cast aluminium alloy of high-tensile and elongation percentage comprehensive mechanical property and excellent corrosion resistance, low cost。Through the development of decades, high strength cast aluminum alloys has formed complete series, and performance and the production technology of aluminium alloy all tend towards stability。
At present, high-strength aluminum alloy is mainly with Al-Cu-Mg and the Al-Zn-Mg-Cu alloy being base。Wherein, Al-Cu-Mg base alloy has good machining and welding performance, but casting character and decay resistance are poor。This kind of aluminium alloy is applied relatively wide on aeronautical product, is mainly used as the structural member bearing big load and heat-resisting part。Al-Zn-Mg-Cu base alloy excellent cutting performance, and when not carrying out solution treatment, at room temperature through the timeliness of short period, its intensity can be improved to a certain extent。But poor corrosion resistance, density is big, easily produces hot tearing during casting。
Owing to the industry requirement aluminium alloys such as automobile, machinery and communication have excellent casting character, such as good fluidity, air-tightness is good, shrinkage factor is little and hot cracking tendency is little, therefore, need to select and there is good mechanical property, physical property and machinability preferably, simultaneously corrosion resistance and good again, cost is low, and is suitable for the aluminium alloy of the high-intensity high-tenacity produced in enormous quantities, wherein, with kind at most, the widest Alar of purposes is for preferred object。Wherein, A356.2 aluminium alloy in U.S.'s ASTMB108 standard, its primary alloy constituent mass percent is 6.5-7.5%Si, 0.25-0.45%Mg, 0.08-0.20%Ti, and major impurity element is Fe≤0.20%, Cu≤0.20%, Mn≤0.10%, Zn≤0.10%, and residual components is Al。
The application of A356.2 aluminium alloy is very wide, but intensity is not high。In order to improve the mechanical property of A356 alloy, the mode adopted at present has: carry out crystal grain thinning by the method for interpolation Na, Sr, Sb and Ti, B iso-metamorphism material。But, the aluminium alloy after above-mentioned process is difficult to stably reach the tensile strength of more than 300Mpa mostly, and elongation percentage is also on the low side。Also have by adding unit's usually crystal grain thinning such as rare earth, or increase extrusion process on this basis, to improve casting character and the mechanical property of aluminium alloy, but thus also make the founding of aluminium alloy more complicated, relatively costly。
Summary of the invention
A kind of casting character of offer is provided and mechanical property is good and the aluminum-silicon-magnesium Cast aluminium alloy of good corrosion resistance golden and casting technique。
In order to achieve the above object, the present invention proposes a kind of aluminum-silicon-magnesium Cast aluminium alloy gold, and described aluminium alloy component comprises the element of following mass percent:
Silicon 6.5-7.5；Magnesium 0.40-0.60；Titanium 0.10-0.30；Strontium 0.01-0.03；Ferrum≤0.20；Copper≤0.10；Zinc≤0.20；Manganese≤0.10；Beryllium≤0.01；Vanadium≤0.02；All the other are aluminum。
Preferably, described aluminium alloy tensile strength is more than 380Mpa；Elongation percentage is more than or equal to 7.8%；Brinell hardness is more than 85。
Preferably, the mass percentage content of each element forming described aluminium alloy is: silicon 7.021；Magnesium 0.463；Titanium 0.237；Strontium 0.018；Ferrum 0.183；Copper 0.040；Zinc 0.018；Manganese 0.098；Beryllium 0.003；Vanadium 0.019；All the other are aluminum；Described aluminium alloy tensile strength is 411Mpa, and elongation percentage is 8.04%。
Preferably, the mass percentage content of each element forming described aluminium alloy is: silicon 7.035；Magnesium 0.453；Titanium 0.229；Strontium 0.017；Ferrum 0.189；Copper 0.041；Zinc 0.019；Manganese 0.099；Beryllium 0.002；Vanadium 0.018；All the other are aluminum；Described aluminium alloy tensile strength is 400Mpa, and elongation percentage is 7.80%。
Preferably, the mass percentage content of each element forming described aluminium alloy is: silicon 7.087；Magnesium 0.459；Titanium 0.185；Strontium 0.014；Ferrum 0.169；Copper 0.063；Zinc 0.024；Manganese 0.089；Beryllium 0.002；Vanadium 0.017；All the other are aluminum；Described aluminium alloy tensile strength is 388Mpa, and elongation percentage is 10.02%。
The present invention also proposes a kind of aluminum-silicon-magnesium aluminum alloy casting technique, comprises the following steps:
By A356.2 aluminium ingot shove charge melting；
Aluminium ingot solution after melting adds rotten material, adopts bubble Filtration to carry out refine；
After the solution left standstill scheduled time after refine, cast at a predetermined temperature；
Solution after casting is sequentially carried out solid solution, cooling, transfer and Ageing Treatment。
Preferably, the temperature that described aluminium ingot solution carries out refine is 720 DEG C～730 DEG C, and refining time is 15～25 minutes；Solid solution temperature is 535 DEG C ± 5 DEG C, and the solution treatment time is 8h～10h；Aging temperature is 165 DEG C ± 5 DEG C, and aging time is 6h-8h。
A kind of aluminum-silicon-magnesium Cast aluminium alloy gold of present invention proposition and casting technique, overcome Alar low strength, elongation percentage is on the low side, and aluminum bronze system and aluminum zinc series alloy casting character and the poor deficiency of decay resistance, adopt aluminum-silicon-magnesium Cast aluminium alloy gold, improve the tensile strength of aluminium alloy, toughness and casting character, there is less costly and corrosion resistance and good advantage simultaneously。
Accompanying drawing explanation
Fig. 1 is the stress strain curve schematic diagram of aluminum-silicon-magnesium Cast aluminium alloy gold first embodiment of the present invention；
Fig. 2 is the stress strain curve schematic diagram of aluminum-silicon-magnesium Cast aluminium alloy of the present invention gold the second embodiment；
Fig. 3 is the stress strain curve schematic diagram of aluminum-silicon-magnesium Cast aluminium alloy of the present invention gold the 3rd embodiment；
Fig. 4 is aluminum-silicon-magnesium aluminum alloy casting technique one embodiment schematic flow sheet of the present invention。
In order to make technical scheme clearly, understand, be described in further detail below in conjunction with accompanying drawing。
Detailed description of the invention
Solution for embodiment of the invention is mainly: on the basis of existing A356.2 aluminium alloy, goes bad and forms containing following mass percent: silicon 6.5-7.5；Magnesium 0.40-0.60；Titanium 0.10-0.30；Strontium 0.01-0.03；Ferrum≤0.20；Copper≤0.10；Zinc≤0.20；Manganese≤0.10；Beryllium≤0.01；Vanadium≤0.02；All the other are the element of aluminum, by melting, refine, casting, solid solution, cooling, transfer and Ageing Treatment, obtain the aluminum-silicon-magnesium Cast aluminium alloy gold of tensile strength and elongation percentage height, casting character and corrosion resistance and good。
In order to overcome Alar low strength in prior art, elongation percentage is on the low side, and aluminum bronze system and aluminum zinc series alloy casting character and the poor deficiency of decay resistance, the present invention provides the aluminum-silicon-magnesium Cast aluminium alloy gold of a kind of high intensity, high tenacity, good casting property, have less costly, the advantage of corrosion resistance and good simultaneously。This aluminum-silicon-magnesium Cast aluminium alloy gold is rotten on existing A356.2 aluminium ingot basis forming, and its concrete component comprises the element of following mass percent:
Silicon 6.5-7.5；Magnesium 0.40-0.60；Titanium 0.10-0.30；Strontium 0.01-0.03；Ferrum≤0.20；Copper≤0.10；Zinc≤0.20；Manganese≤0.10；Beryllium≤0.01；Vanadium≤0.02；All the other are aluminum。
By the elementary composition aluminium alloy tensile strength of above-mentioned mass percent more than 380Mpa；Elongation percentage is more than or equal to 7.8%；Brinell hardness is more than 85。
Specifically, a kind of aluminum-silicon-magnesium Cast aluminium alloy gold that first embodiment of the invention proposes, the mass percentage content of each element forming this aluminium alloy is: silicon 7.021；Magnesium 0.463；Titanium 0.237；Strontium 0.018；Ferrum 0.183；Copper 0.040；Zinc 0.018；Manganese 0.098；Beryllium 0.003；Vanadium 0.019；All the other are aluminum。
The present embodiment aluminum-silicon-magnesium Cast aluminium alloy gold foundry technology process is:
After A356.2 aluminium ingot shove charge melting, adopt bubble to filter (GBF) method and the solution after melting is carried out refine, gas in bubble Filtration can adopt argon or nitrogen, while refine, rotten material can be added in refine solution, this rotten material can adopt al-sr alloy solution, with better crystal grain thinning, to improve casting character and the mechanical property of aluminium alloy。
Above-mentioned bubble Filtration belongs to existing current techique, is not described in detail here。
Wherein, refining temperature can be 725 DEG C ± 5 DEG C, and the time is 15 minutes, in the process of refine, carries out taking off Slag treatment simultaneously。
After refine completes, after the such as 10 minutes solution left standstill scheduled time after refine, detect the hydrogen content in solution, dregginess and material composition, after detection is qualified, cast at 720 DEG C ± 5 DEG C。Then, through excess temperature be 535 DEG C ± 5 DEG C, the time be the solution treatment of 10 hours, cool down followed by the warm water of 35 DEG C-60 DEG C, transfer time need to less than 20 seconds, then through the Ageing Treatment of 165 DEG C ± 5 DEG C, 6 hours。
The present embodiment is by the Cast aluminium alloy gold stress strain curve after the turning of test rod top layer as shown in Figure 1。The diameter of this test rod is 9.92mm, and maximum pull is 31.77KN (thousand newton), and tensile strength is 411Mpa, elongation after fracture and elongation percentage is 8.04%。
A kind of aluminum-silicon-magnesium Cast aluminium alloy gold that second embodiment of the invention proposes, the mass percentage content of each element forming this aluminium alloy is: silicon 7.035；Magnesium 0.453；Titanium 0.229；Strontium 0.017；Ferrum 0.189；Copper 0.041；Zinc 0.019；Manganese 0.099；Beryllium 0.002；Vanadium 0.018；All the other are aluminum。
The present embodiment aluminum-silicon-magnesium Cast aluminium alloy gold foundry technology process is identical with above-mentioned first embodiment, and the Cast aluminium alloy gold stress strain curve after the top layer turning of the present embodiment test rod is as shown in Figure 2。The diameter of this test rod is 9.89mm, and maximum pull is 30.784KN, and tensile strength is 400Mpa, and elongation after fracture is 7.80%。
A kind of aluminum-silicon-magnesium Cast aluminium alloy gold that third embodiment of the invention proposes, the mass percentage content of each element forming this aluminium alloy is: silicon 7.087；Magnesium 0.459；Titanium 0.185；Strontium 0.014；Ferrum 0.169；Copper 0.063；Zinc 0.024；Manganese 0.089；Beryllium 0.002；Vanadium 0.017；All the other are aluminum。
The present embodiment aluminum-silicon-magnesium Cast aluminium alloy gold foundry technology process is identical with above-mentioned first embodiment。Cast aluminium alloy gold stress strain curve after the top layer turning of the present embodiment test rod is as shown in Figure 3。This specimen finish is 10.2mm, and maximum pull is 31.740KN, and tensile strength is 388Mpa, and elongation after fracture is 10.02%。
The aluminum-silicon-magnesium Cast aluminium alloy gold that the embodiment of the present invention proposes overcomes Alar low strength, elongation percentage is on the low side, and aluminum bronze system and aluminum zinc series alloy casting character and the poor deficiency of decay resistance, adopt aluminum-silicon-magnesium Cast aluminium alloy gold, improve the tensile strength of aluminium alloy, toughness and casting character, there is less costly and corrosion resistance and good advantage simultaneously。
As shown in Figure 4, one embodiment of the invention proposes a kind of aluminum-silicon-magnesium aluminum alloy casting technique, including:
Step S101, by A356.2 aluminium ingot shove charge melting；
Step S102, adds rotten material in the aluminium ingot solution after melting, adopt bubble Filtration to carry out refine；
Wherein, adding rotten material in refining process is for better crystal grain thinning, to improve casting character and the mechanical property of aluminium alloy。Rotten material can be al-sr alloy, also can adopt its allometamorphism material as required。Gas in bubble Filtration can adopt argon or nitrogen。
Refining temperature in refining process can select 720 DEG C～730 DEG C, and refining time can select 15～25 minutes。
Additionally, in refining process, carry out pulling out Slag treatment, to improve the purity of aluminium alloy simultaneously。
Step S103, after the solution left standstill scheduled time after refine, casts at a predetermined temperature；
Wherein, the scheduled time can select 10-15 minute, in this step, after the solution left standstill scheduled time after refine, it is necessary to the detection hydrogen content of solution, dregginess and material composition；After testing result is qualified, then cast at the temperature of 715 DEG C～725 DEG C。
Step S104, is sequentially carried out solid solution, cooling, transfer and Ageing Treatment to the solution after casting。
In the present embodiment, solid solution temperature can select 535 DEG C ± 5 DEG C, and the solution treatment time can be 8h～10h (hour)；Aging temperature can be 165 DEG C ± 5 DEG C, and aging time can be 6h-8h。
The mass percent of each component of the aluminium alloy made by the above-mentioned technique of the present embodiment is respectively as follows: silicon 6.5-7.5；Magnesium 0.40-0.60；Titanium 0.10-0.30；Strontium 0.01-0.03；Ferrum≤0.20；Copper≤0.10；Zinc≤0.20；Manganese≤0.10；Beryllium≤0.01；Vanadium≤0.02；All the other are aluminum。
The tensile strength of above-mentioned aluminium alloy is more than 380Mpa；Elongation percentage is more than or equal to 7.8%；Brinell hardness is more than 85。
Compared to existing technology, the aluminum-silicon-magnesium Cast aluminium alloy gold of embodiment of the present invention proposition and casting technique, overcome Alar low strength, elongation percentage is on the low side, and aluminum bronze system and aluminum zinc series alloy casting character and the poor deficiency of decay resistance, adopt aluminum-silicon-magnesium Cast aluminium alloy gold, improve the tensile strength of aluminium alloy, toughness and casting character, there is less costly and corrosion resistance and good advantage simultaneously。
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or flow process conversion; or directly or indirectly it is used in other relevant technical field, all in like manner include in the scope of patent protection of the present invention。
Claims (7)
1. an aluminum-silicon-magnesium Cast aluminium alloy gold, it is characterised in that described aluminium alloy component comprises the element of following mass percent:
Silicon 6.5-7.5；Magnesium 0.40-0.60；Titanium 0.10-0.30；Strontium 0.01-0.03；Ferrum≤0.20；Copper is more than zero and≤0.10；Zinc is more than zero and≤0.20；Manganese is more than zero and≤0.10；Beryllium is more than zero and≤0.01；Vanadium is more than zero and≤0.02；All the other are aluminum；
The tensile strength of described aluminium alloy is more than 380Mpa；Elongation percentage is more than or equal to 7.8%。
2. aluminium alloy according to claim 1, it is characterised in that the Brinell hardness of described aluminium alloy is more than 85。
3. aluminium alloy according to claim 2, it is characterised in that the mass percentage content of each element forming described aluminium alloy is: silicon 7.021；Magnesium 0.463；Titanium 0.237；Strontium 0.018；Ferrum 0.183；Copper 0.040；Zinc 0.018；Manganese 0.098；Beryllium 0.003；Vanadium 0.019；All the other are aluminum；Described aluminium alloy tensile strength is 411Mpa, and elongation percentage is 8.04%。
4. aluminium alloy according to claim 2, it is characterised in that the mass percentage content of each element forming described aluminium alloy is: silicon 7.035；Magnesium 0.453；Titanium 0.229；Strontium 0.017；Ferrum 0.189；Copper 0.041；Zinc 0.019；Manganese 0.099；Beryllium 0.002；Vanadium 0.018；All the other are aluminum；Described aluminium alloy tensile strength is 400Mpa, and elongation percentage is 7.80%。
5. aluminium alloy according to claim 2, it is characterised in that the mass percentage content of each element forming described aluminium alloy is: silicon 7.087；Magnesium 0.459；Titanium 0.185；Strontium 0.014；Ferrum 0.169；Copper 0.063；Zinc 0.024；Manganese 0.089；Beryllium 0.002；Vanadium 0.017；All the other are aluminum；Described aluminium alloy tensile strength is 388Mpa, and elongation percentage is 10.02%。
6. the casting technique of the aluminum-silicon-magnesium Cast aluminium alloy gold as according to any one of claim 1-5, it is characterised in that comprise the following steps:
By A356.2 aluminium ingot shove charge melting；
Aluminium ingot liquation after melting adds rotten material, adopts bubble Filtration to carry out refine；
After liquation after refine is stood the scheduled time, cast at a predetermined temperature；
Solution after casting is sequentially carried out solid solution, cooling, transfer and Ageing Treatment。
7. casting technique according to claim 6, it is characterised in that the temperature that described aluminium ingot liquation carries out refine is 720 DEG C～730 DEG C, and refining time is 15～25 minutes；Solid solution temperature is 535 DEG C ± 5 DEG C, and the solution treatment time is 8h～10h；Aging temperature is 165 DEG C ± 5 DEG C, and aging time is 6h-8h。
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| CN201110267111.5A CN102312137B (en) | 2011-09-09 | 2011-09-09 | Aluminum-silicon-magnesium Cast aluminium alloy gold and casting technique |
| PCT/CN2012/076106 WO2013034001A1 (en) | 2011-09-09 | 2012-05-25 | Al-si-mg cast aluminum alloy and process for casting same |
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| CN201110267111.5A CN102312137B (en) | 2011-09-09 | 2011-09-09 | Aluminum-silicon-magnesium Cast aluminium alloy gold and casting technique |
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| CN115305391B (en) * | 2022-08-10 | 2023-06-06 | 中南大学 | Low-energy-consumption aluminum-silicon-magnesium alloy and preparation method thereof |
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| WO2013034001A1 (en) | 2013-03-14 |
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