CN102417997B - Preparation method of reclaimed 7075 aluminum alloy containing rare earth - Google Patents
Preparation method of reclaimed 7075 aluminum alloy containing rare earth Download PDFInfo
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Abstract
The invention discloses a preparation method of reclaimed 7075 aluminum alloy containing rare earth. The invention belongs to the technical field of materials. the method comprises steps that: surface impurities are removed from waste 6063 aluminum; smelting material alloys are prepared; metal aluminum is heated until melted; a mixed salt is added to the melted aluminum; the waste 6063 aluminum is added to the mixture, and the mixture is melted; metal silicon, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy and Al-3Ti alloy are pressed in the mixture and are melted; Al-RE alloy, metal magnesium and excess metal magnesium and metal zinc are added to the mixture; the mixture is melted and heated; mixed gas of argon and nitrogen is delivered into the mixture; the mixture is settled and used for casting; a cast ingot is subject to preheating and hot rolling; the rolled material is subject to a solid solution treatment and water quenching; then the material is subject to an aging treatment for 15-20h under a temperature condition of 110-115 DEG C. With the method, the consumption of industrial pure aluminum is reduced, waste aluminum is cyclically utilized, and sustainable development of aluminum industries can be realized. The method has advantages of high recovery rate, low cost, and low pollution.
Description
Technical field
The invention belongs to the material technology field, particularly a kind of preparation method who contains the reclaimed 7075 aluminum alloy of rare earth.
Background technology
It is the superstrength wrought aluminium alloy that 7075 aluminium alloys belong to 7XXX, be widely used in aircraft industry, also have blow die, high youngster husband bulb, footwear mould, paper mould, be foamed into other heavily stressed structural parts against corrosion such as pattern, Tuo Lamo, model, anchor clamps, mechanical means, Mould Machining; Solution treatment can improve its plasticity, and thermal treatment can improve its intensity.
For a long time, 7075 aluminium alloys such as grade are all preparations take commercial-purity aluminium as main raw material mostly, commercial-purity aluminium generally makes with electrolytic process, in this process, consume a large amount of Mineral resources and the natural resourcess such as bauxite, coal, Wingdale and water, and discharge solid and the gas trade wastes such as a large amount of carbonic acid gas, red mud and fluoro-gas, brought huge pressure for physical environment and resource; Because the consumption of aluminium product increases day by day, produces a large amount of aluminium scraps, be present urgent problem if utilize these aluminium scraps to produce qualified aluminium alloy.
If can partly substitute fine aluminium with aluminium scrap, will reduce the consumption of fine aluminium, indirectly play the consumption that reduces fine aluminium, alleviate environmental stress.Alloy needle prepares the drawback of the existence of 7075 aluminium alloys to tradition, the present invention proposes and a kind ofly utilize waste and old 6063 aluminium alloys to prepare the technique of reclaimed 7075 aluminum alloy, this technique can reduce the consumption of commercial-purity aluminium, realize the recycle of waste aluminium alloy, realize the Sustainable development of aluminium industry, and this technique there are the advantages such as the aluminium scrap rate of recovery is high, cost is low, pollution is few.And in regeneration 7075 fusion process, add rare earth element, to guarantee the mechanical property of secondary aluminium alloy, reduce the tissue defects such as pore.
Summary of the invention
For the larger problem of energy consumption in traditional 7075 aluminium alloy preparation process, the invention provides a kind of preparation method who contains the reclaimed 7075 aluminum alloy of rare earth, utilize waste aluminum partly to substitute fine aluminium as raw material, reduce the consumption of fine aluminium, indirectly play the consumption that reduces fine aluminium, alleviate the effect of environmental stress.
The preparation method who contains the reclaimed 7075 aluminum alloy of rare earth of the present invention carries out according to the following steps:
1, waste and old 6063 aluminium alloys is cleaned the removal surface impurity and dry again its composition of rear chemical examination;
2, prepare metallic aluminium, Pure Silicon Metal, MAGNESIUM METAL, metallic zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-RE alloy as the melting material alloys, make total composition of melting material alloys and waste and old 6063 aluminium alloys be by weight percentage Si0.35%, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, RE0.05 ~ 0.5%, surplus is aluminium, prepares simultaneously excess metal magnesium, and excess metal magnesium accounts for 3 ~ 5% of MAGNESIUM METAL gross weight in the molten alloy material; Wherein the weight of waste and old 6063 aluminium alloys accounts for 45 ~ 55% of melting material alloys and waste and old 6063 aluminium alloy gross weights;
3, the metallic aluminium of preparing is put into induction furnace, be heated to 850 ± 5 ℃, add mixing salt after the metallic aluminium fusing, add again waste and old 6063 aluminium alloys, then reheat to 850 ± 5 ℃ and make whole material meltings obtain melts; Described mixing salt composition be KCl45 ~ 48% by weight percentage, NaCl30 ~ 32%, Na
3AlF
620 ~ 25%, mixing salt add-on be 0.1 ~ 0.4% of metallic aluminium gross weight;
4, in melt, add Pure Silicon Metal, with bell jar Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy and Al-3Ti alloy are pressed in the melt to whole material meltings again;
5, be pressed into Al-RE alloy, MAGNESIUM METAL, excess metal magnesium and metallic zinc with bell jar, to whole material meltings, then be warming up to 800 ± 5 ℃, the mixed gas that passes into argon gas and nitrogen in the melt carries out degasification to melt, stop when the hydrogen weight content is less than the 0.1mL/100g melt to the melt, pour into a mould after melt left standstill 15 ~ 30min, obtain aluminium alloy cast ingot;
6, aluminium alloy cast ingot is carried out thermal pretreatment at 440 ~ 480 ℃ of insulation 1.2 ~ 1.5h, then rolling under 440 ~ 480 ℃ of conditions, compression ratio is 60 ~ 80%, obtains hot rolling aluminium alloy;
7, with hot rolling aluminium alloy at 300 ~ 340 ℃ of anneal 120 ~ 150min, eliminate internal stress, then be cooled to normal temperature and carry out cold rollingly, compression ratio is 30 ~ 50%, obtains cold rolling aluminium alloy;
8, with cold rolling aluminium alloy solution treatment 1.2 ~ 1.5h under 450 ~ 460 ℃ of conditions, then Water Quenching is to normal temperature;
9, with the ageing treatment 15 ~ 20h under 110 ~ 115 ℃ of conditions of the cold rolling aluminium alloy after the shrend, make the reclaimed 7075 aluminum alloy that contains rare earth.
Waste and old 6063 aluminium alloys are cleaned in the aforesaid method removed surface impurity drying to refer to weight concentration 5 ~ 10% and temperature to be that 65 ± 5 ℃ sodium hydroxide solution cleans the removal surface impurity again, water is cleared sodium hydroxide solution out again, then at 150 ~ 200 ℃ of oven dry 20 ~ 40min.
In the aforesaid method, waste and old 6063 aluminium alloys of adding are to be divided at least 3 batches of addings, and the timed interval of adjacent twice adding is 20 ~ 25min.
Al-RE alloy in the aforesaid method is the Al-10La alloy.
The volume ratio of two kinds of gases is 1:1 in argon gas in the aforesaid method and the mixed gas of nitrogen.
The tensile strength of the reclaimed 7075 aluminum alloy that contains rare earth that aforesaid method obtains is 590 ~ 650MPa, and unit elongation δ is 12 ~ 15%.
In the method for the present invention waste aluminium alloy is added the rate of recovery of energy Effective Raise waste aluminium alloy in batches, in aluminium alloy, add the mechanical property that rare earth can guarantee secondary aluminium alloy, reduce the tissue defects such as pore; The reclaimed 7075 aluminum alloy performance that obtains is better than 7075 conventional aluminium alloys.
Method of the present invention has reduced the consumption of commercial-purity aluminium, realizes the recycle of waste aluminium alloy, realizes the Sustainable development of aluminium industry, and has the advantages such as the aluminium scrap rate of recovery is high, cost is low, pollution is few.
Embodiment
The weight purity of the MAGNESIUM METAL that adopts in the embodiment of the invention, metallic zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-10La alloy 〉=99.8%; The weight purity of metallic aluminium and Pure Silicon Metal 〉=99.3%.
The argon gas that adopts in the embodiment of the invention and the bulk purity of nitrogen 〉=99.95%.
The KCl that adopts in the embodiment of the invention, NaCl and Na
3AlF
6Be the general industry product, weight purity 〉=99%.
Embodiment 1
Be that 65 ± 5 ℃ sodium hydroxide solution clean to be removed surface impurity with waste and old 6063 aluminium alloys with weight concentration 5% and temperature, water is cleared sodium hydroxide solution out again, then at 150 ~ 200 ℃ of oven dry 30min, chemically examines its composition again;
Prepare metallic aluminium, Pure Silicon Metal, MAGNESIUM METAL, metallic zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-10La alloy as the melting material alloys, make total composition of melting material alloys and waste and old 6063 aluminium alloys be by weight percentage Si0.35%, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, La0.05%, surplus is aluminium and inevitable impurity, prepares excess metal magnesium again and accounts for 5% of MAGNESIUM METAL gross weight in the molten alloy material; Wherein the weight of waste and old 6063 aluminium alloys accounts for 55% of melting material alloys and waste and old 6063 aluminium alloy gross weights;
The metallic aluminium of preparing is put into induction furnace, be heated to 850 ± 5 ℃, add mixing salt after the metallic aluminium fusing, more waste and old 6063 aluminium horizontals are divided into 3 batches of addings, the timed interval of adjacent twice adding is 25min, then reheats to 850 ± 5 ℃ to make whole material meltings obtain melts; Described mixing salt composition be KCl47% by weight percentage, NaCl31%, Na
3AlF
622%, mixing salt add-on be 0.1% of metallic aluminium gross weight;
In melt, add Pure Silicon Metal, with bell jar Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy and Al-3Ti alloy are pressed in the melt to whole material meltings again;
Be pressed into Al-RE alloy, MAGNESIUM METAL, excess metal magnesium and metallic zinc with bell jar, to whole material meltings, then cooling rises 800 ± 5 ℃, and the mixed gas that passes into argon gas and nitrogen in the melt carries out degasification to melt, and the volume ratio of argon gas and nitrogen is 1:1 in the mixed gas; Degasification stops when the hydrogen weight content is less than the 0.1mL/100g melt to the melt, pours into a mould after melt is left standstill 15min, obtains aluminium alloy cast ingot;
Aluminium alloy cast ingot is carried out thermal pretreatment at 440 ℃ of insulation 1.5h, and then rolling under 440 ℃ of conditions, compression ratio is 60%, obtains hot rolling aluminium alloy;
Hot rolling aluminium alloy at 300 ℃ of anneal 120 ~ 150min, is eliminated internal stress, then be cooled to normal temperature and carry out cold rollingly, compression ratio is 30%, obtains cold rolling aluminium alloy;
With cold rolling aluminium alloy solution treatment 1.3h under 460 ℃ of conditions, then Water Quenching is to normal temperature;
With the ageing treatment 20h under 110 ℃ of conditions of the cold rolling aluminium alloy after the shrend, make the reclaimed 7075 aluminum alloy that contains rare earth, tensile strength is 650MPa, unit elongation δ is 12%.
Embodiment 2
Be that 65 ± 5 ℃ sodium hydroxide solution clean to be removed surface impurity with waste and old 6063 aluminium alloys with weight concentration 6% and temperature, water is cleared sodium hydroxide solution out again, then at 150 ~ 200 ℃ of oven dry 40min, chemically examines its composition again;
Prepare metallic aluminium, Pure Silicon Metal, MAGNESIUM METAL, metallic zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-10La alloy as the melting material alloys, make total composition of melting material alloys and waste and old 6063 aluminium alloys be by weight percentage Si0.35%, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, La0.1%, surplus is aluminium and inevitable impurity, prepares excess metal magnesium again and accounts for 3% of MAGNESIUM METAL gross weight in the molten alloy material; Wherein the weight of waste and old 6063 aluminium alloys accounts for 45% of melting material alloys and waste and old 6063 aluminium alloy gross weights;
The metallic aluminium of preparing is put into induction furnace, be heated to 850 ± 5 ℃, add mixing salt after the metallic aluminium fusing, more waste and old 6063 aluminium horizontals are divided into 4 batches of addings, the timed interval of adjacent twice adding is 23min, then reheats to 850 ± 5 ℃ to make whole material meltings obtain melts; Described mixing salt composition be KCl46% by weight percentage, NaCl31%, Na
3AlF
623%, mixing salt add-on be 0.2% of metallic aluminium gross weight;
In melt, add Pure Silicon Metal, with bell jar Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy and Al-3Ti alloy are pressed in the melt to whole material meltings again;
Be pressed into Al-RE alloy, MAGNESIUM METAL, excess metal magnesium and metallic zinc with bell jar, to whole material meltings, then cooling rises 800 ± 5 ℃, and the mixed gas that passes into argon gas and nitrogen in the melt carries out degasification to melt, and the volume ratio of argon gas and nitrogen is 1:1 in the mixed gas; Degasification stops when the hydrogen weight content is less than the 0.1mL/100g melt to the melt, pours into a mould after melt is left standstill 20min, obtains aluminium alloy cast ingot;
Aluminium alloy cast ingot is carried out thermal pretreatment at 450 ℃ of insulation 1.2h, and then rolling under 450 ℃ of conditions, compression ratio is 70%, obtains hot rolling aluminium alloy;
Hot rolling aluminium alloy at 320 ℃ of anneal 120 ~ 150min, is eliminated internal stress, then be cooled to normal temperature and carry out cold rollingly, compression ratio is 40%, obtains cold rolling aluminium alloy;
With cold rolling aluminium alloy solution treatment 1.4h under 450 ℃ of conditions, then Water Quenching is to normal temperature;
With the ageing treatment 15h under 115 ℃ of conditions of the cold rolling aluminium alloy after the shrend, make the reclaimed 7075 aluminum alloy that contains rare earth, tensile strength is 620MPa, unit elongation δ is 13%.
Embodiment 3
Be that 65 ± 5 ℃ sodium hydroxide solution clean to be removed surface impurity with waste and old 6063 aluminium alloys with weight concentration 8% and temperature, water is cleared sodium hydroxide solution out again, then at 150 ~ 200 ℃ of oven dry 30min, chemically examines its composition again;
Prepare metallic aluminium, Pure Silicon Metal, MAGNESIUM METAL, metallic zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-10La alloy as the melting material alloys, make total composition of melting material alloys and waste and old 6063 aluminium alloys be by weight percentage Si0.35%, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, La0.3%, surplus is aluminium and inevitable impurity, prepares excess metal magnesium again and accounts for 4% of MAGNESIUM METAL gross weight in the molten alloy material; Wherein the weight of waste and old 6063 aluminium alloys accounts for 50% of melting material alloys and waste and old 6063 aluminium alloy gross weights;
The metallic aluminium of preparing is put into induction furnace, be heated to 850 ± 5 ℃, add mixing salt after the metallic aluminium fusing, more waste and old 6063 aluminium horizontals are divided into 5 batches of addings, the timed interval of adjacent twice adding is 20min, then reheats to 850 ± 5 ℃ to make whole material meltings obtain melts; Described mixing salt composition be KCl48% by weight percentage, NaCl32%, Na
3AlF
620%, mixing salt add-on be 0.3% of metallic aluminium gross weight;
In melt, add Pure Silicon Metal, with bell jar Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy and Al-3Ti alloy are pressed in the melt to whole material meltings again;
Be pressed into Al-RE alloy, MAGNESIUM METAL, excess metal magnesium and metallic zinc with bell jar, to whole material meltings, then cooling rises 800 ± 5 ℃, and the mixed gas that passes into argon gas and nitrogen in the melt carries out degasification to melt, and the volume ratio of argon gas and nitrogen is 1:1 in the mixed gas; Degasification stops when the hydrogen weight content is less than the 0.1mL/100g melt to the melt, pours into a mould after melt is left standstill 25min, obtains aluminium alloy cast ingot;
Aluminium alloy cast ingot is carried out thermal pretreatment at 460 ℃ of insulation 1.3h, and then rolling under 460 ℃ of conditions, compression ratio is 80%, obtains hot rolling aluminium alloy;
Hot rolling aluminium alloy at 330 ℃ of anneal 120 ~ 150min, is eliminated internal stress, then be cooled to normal temperature and carry out cold rollingly, compression ratio is 50%, obtains cold rolling aluminium alloy;
With cold rolling aluminium alloy solution treatment 1.2h under 460 ℃ of conditions, then Water Quenching is to normal temperature;
With the ageing treatment 18h under 112 ℃ of conditions of the cold rolling aluminium alloy after the shrend, make the reclaimed 7075 aluminum alloy that contains rare earth, tensile strength is 600MPa, unit elongation δ is 14%.
Embodiment 4
Be that 65 ± 5 ℃ sodium hydroxide solution clean to be removed surface impurity with waste and old 6063 aluminium alloys with weight concentration 10% and temperature, water is cleared sodium hydroxide solution out again, then at 150 ~ 200 ℃ of oven dry 20min, chemically examines its composition again;
Prepare metallic aluminium, Pure Silicon Metal, MAGNESIUM METAL, metallic zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-10La alloy as the melting material alloys, make total composition of melting material alloys and waste and old 6063 aluminium alloys be by weight percentage Si0.35%, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, La0.5%, surplus is aluminium and inevitable impurity, prepares excess metal magnesium again and accounts for 5% of MAGNESIUM METAL gross weight in the molten alloy material; Wherein the weight of waste and old 6063 aluminium alloys accounts for 55% of melting material alloys and waste and old 6063 aluminium alloy gross weights;
The metallic aluminium of preparing is put into induction furnace, be heated to 850 ± 5 ℃, add mixing salt after the metallic aluminium fusing, more waste and old 6063 aluminium horizontals are divided into 3 batches of addings, the timed interval of adjacent twice adding is 25min, then reheats to 850 ± 5 ℃ to make whole material meltings obtain melts; Described mixing salt composition be KCl45% by weight percentage, NaCl30%, Na
3AlF
625%, mixing salt add-on be 0.4% of metallic aluminium gross weight;
In melt, add Pure Silicon Metal, with bell jar Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy and Al-3Ti alloy are pressed in the melt to whole material meltings again;
Be pressed into Al-RE alloy, MAGNESIUM METAL, excess metal magnesium and metallic zinc with bell jar, to whole material meltings, then be cooled to 800 ± 5 ℃, the mixed gas that passes into argon gas and nitrogen in the melt carries out degasification to melt, and the volume ratio of argon gas and nitrogen is 1:1 in the mixed gas; Degasification stops when the hydrogen weight content is less than the 0.1mL/100g melt to the melt, pours into a mould after melt is left standstill 30min, obtains aluminium alloy cast ingot;
Aluminium alloy cast ingot is carried out thermal pretreatment at 480 ℃ of insulation 1.4h, and then rolling under 480 ℃ of conditions, compression ratio is 70%, obtains hot rolling aluminium alloy;
Hot rolling aluminium alloy at 340 ℃ of anneal 120 ~ 150min, is eliminated internal stress, then be cooled to normal temperature and carry out cold rollingly, compression ratio is 40%, obtains cold rolling aluminium alloy;
With cold rolling aluminium alloy solution treatment 1.5h under 450 ℃ of conditions, then Water Quenching is to normal temperature;
With the ageing treatment 16h under 114 ℃ of conditions of the cold rolling aluminium alloy after the shrend, make the reclaimed 7075 aluminum alloy that contains rare earth, tensile strength is 590MPa, unit elongation δ is 15%.
Claims (4)
1. preparation method who contains the reclaimed 7075 aluminum alloy of rare earth is characterized in that carrying out according to the following steps:
(1) waste and old 6063 aluminium alloys is cleaned the removal surface impurity and dry again its composition of rear chemical examination;
(2) prepare metallic aluminium, industrial silicon, MAGNESIUM METAL, metallic zinc, Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy, Al-3Ti alloy and Al-RE alloy as the melting material alloys, make total composition of melting material alloys and waste and old 6063 aluminium alloys be by weight percentage Si0.35%, Cu1.6%, Mn0.30%, Mg2.5%, Cr0.25%, Zn5.5%, Ti0.20%, RE0.05 ~ 0.5%, surplus is aluminium, prepares simultaneously excess metal magnesium, and excess metal magnesium accounts for 3 ~ 5% of MAGNESIUM METAL gross weight in the molten alloy material; Wherein the weight of waste and old 6063 aluminium alloys accounts for 45 ~ 55% of melting material alloys and waste and old 6063 aluminium alloy gross weights;
(3) metallic aluminium of preparing is put into induction furnace, be heated to 850 ± 5 ℃, add mixing salt after the metallic aluminium fusing, add again waste and old 6063 aluminium alloys, then reheat to 850 ± 5 ℃ and make whole material meltings obtain melts; Described mixing salt composition be KCl45 ~ 48% by weight percentage, NaCl30 ~ 32%, Na
3AlF
620 ~ 25%, mixing salt add-on be 0.1 ~ 0.4% of metallic aluminium gross weight;
(4) in melt, add industrial silicon, with bell jar Al-30Cu alloy, Al-10Mn alloy, Al-2Cr alloy and Al-3Ti alloy are pressed in the melt to whole material meltings again;
(5) be pressed into Al-RE alloy, MAGNESIUM METAL, excess metal magnesium and metallic zinc with bell jar, to whole material meltings, then be warming up to 800 ± 5 ℃, the mixed gas that passes into argon gas and nitrogen in the melt carries out degasification to melt, stop when the hydrogen weight content is less than the 0.1mL/100g melt to the melt, pour into a mould after melt left standstill 15 ~ 30min, obtain aluminium alloy cast ingot;
(6) aluminium alloy cast ingot is carried out thermal pretreatment at 440 ~ 480 ℃ of insulation 1.2 ~ 1.5h, then rolling under 440 ~ 480 ℃ of conditions, compression ratio is 60 ~ 80%, obtains hot rolling aluminium alloy;
(7) with hot rolling aluminium alloy at 300 ~ 340 ℃ of anneal 120 ~ 150min, eliminate internal stress, then be cooled to normal temperature and carry out cold rollingly, compression ratio is 30 ~ 50%, obtains cold rolling aluminium alloy;
(8) with cold rolling aluminium alloy solution treatment 1.2 ~ 1.5h under 450 ~ 460 ℃ of conditions, then Water Quenching is to normal temperature;
(9) with the ageing treatment 15 ~ 20h under 110 ~ 115 ℃ of conditions of the cold rolling aluminium alloy after the shrend, make the reclaimed 7075 aluminum alloy that contains rare earth.
2. a kind of preparation method who contains the reclaimed 7075 aluminum alloy of rare earth according to claim 1 is characterized in that waste and old 6063 aluminium alloys that add are to be divided at least 3 batches of addings, and the timed interval of adjacent twice adding is 20 ~ 25min.
3. a kind of preparation method who contains the reclaimed 7075 aluminum alloy of rare earth according to claim 1 is characterized in that described Al-RE alloy is the Al-10La alloy.
4. a kind of preparation method who contains the reclaimed 7075 aluminum alloy of rare earth according to claim 1 is characterized in that the described tensile strength that contains the reclaimed 7075 aluminum alloy of rare earth is 590 ~ 650MPa, and unit elongation δ is 12 ~ 15%.
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| CN103014458B (en) * | 2012-12-01 | 2014-07-09 | 滁州佳诚模具制造有限公司 | Processing method of improved 7005 aluminum alloy refrigerator foaming die cast |
| CN103014457B (en) * | 2012-12-01 | 2015-09-09 | 滁州佳诚模具制造有限公司 | The complete processing of modified version 7075 aluminium alloy refrigerator foaming mould foundry goods |
| CN103014447B (en) * | 2012-12-01 | 2014-10-01 | 滁州佳诚模具制造有限公司 | Processing method of improved 5052 aluminum alloy refrigerator foaming die cast |
| CN103952577B (en) * | 2014-04-16 | 2016-05-25 | 东北大学 | A kind of preparation method of the regeneration ZL108 aluminium alloy containing rare earth |
| CN105063437B (en) * | 2015-08-01 | 2017-09-19 | 徐大海 | The housing of Internet of Things information collecting device |
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