CN102418013A - Magnesium-containing regenerated high-silicon wrought aluminum alloy and preparation method thereof - Google Patents
Magnesium-containing regenerated high-silicon wrought aluminum alloy and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a magnesium-containing regenerated high-silicon wrought aluminum alloy and a preparation method thereof, belonging to the technical field of materials. The aluminum alloy comprises the following components in percentage by weight: 10.5-13% of Si, 0.5-3% of Mg, 1.0-5.5% of Cu, 1-5.5% of Zn, 0.2-0.4% of La and the balance of aluminum. The preparation method comprises the following steps of: cleaning recovered waste aluminum alloy to remove surface impurities; heating metal aluminum to form melt, and pressing the waste aluminum alloy into the melt; adding metallic silicon, metallic copper, metallic magnesium, metallic zinc and Al-10La alloy to the melt; degassing and then cooling, and casting; pre-heating and then carrying out hot rolling; annealing and then cooling for cold rolling; carrying out solution treatment, and then carrying out water quenching treatment to normal temperature; and carrying out aging treatment for 4-24 hours. The method provided by the invention has the advantages of low cost, simpleness and convenience in operation and good product performance, is suitable for industrial scale production, and has good application prospects.
Description
Technical field
The invention belongs to the material technology field, particularly a kind of magnesium high silicon wrought aluminium alloy and preparation method thereof of regenerating that contains.
Background technology
China's electrolytic aluminum output has reached the first in the world, and the output of China in 2010 is more than 1,600 ten thousand tons; As everyone knows, the electrolysis of aluminum industry is a high energy-consuming industry, according to pertinent data; Disregard the energy consumption of bauxite exploitation; 1 ton of electrolytic aluminum total energy consumption of every product is about 8000 kilograms of standard coal equivalents, and carbonic acid gas, dust and solid waste that discharging is a large amount of have been brought huge pressure to environment protection.
Simultaneously China is the consumption big country of aluminium, the aluminium scrap material production is arranged endlessly in industrial production and waste and old domestic refuse every year; From the generation industry statistic of aluminium scrap, have 1/5 to come from packaging industry approximately, 2/5 comes from transport trade, and 1/3 comes from construction industry; From reclaiming ration statistics, the pop can recovery whole world is on average more than 50%; The aluminium waste recovery of motor vehicle liquidation reaches 95%; The recovery of aluminium waste is the highest by about 98% in the construction industry; Compare with electrolytic aluminum, aluminium scrap occupation again has absolute advantage: save energy, saving resource, minimizing pollutant emission and construction investment economize.
But; For many years the aluminium scrap of China again occupation just be in the edge zone of China aluminum profile extrusion industry; Compared with developed countries, the serious hysteresis of the aluminium scrap of China regeneration industry development, and secondary aluminum output accounts for the ratio also lower (about 30%) of China's primary aluminum output; And the quality of secondary aluminum is not high, and range of application is also smaller.
Because huge economic advantages and the environment-friendly advantage of aluminium scrap regeneration industry, in recent years, aluminium scrap regeneration industry has obtained the attention of various countries; But how to take efficient ways, aluminium scrap is realized highly efficient regeneration, and quality product satisfies the criteria, the technology environment protection standard is present urgent problem.
Summary of the invention
The present invention provides a kind of magnesium high silicon wrought aluminium alloy and preparation method thereof of regenerating that contains, and utilizes waste aluminium alloy as aluminum feedstock, carries out melting, casting with elements such as aluminium and silicon, is prepared into well behaved wrought aluminium alloy.
The magnesium that contains of the present invention is regenerated the composition of high silicon wrought aluminium alloy by weight percentage for Si10.5 ~ 13%, Mg0.5 ~ 3%, and Cu 1.0 ~ 5.5%, Zn1 ~ 5.5%, La 0.2 ~ 0.4%, and surplus is an aluminium.
Of the present invention to contain the regenerate tensile strength of high silicon wrought aluminium alloy of magnesium be 260 ~ 340MPa, and unit elongation δ is 8 ~ 15%, and hardness is 90 ~ 115HV.
The regenerate preparation method of high silicon wrought aluminium alloy of magnesium that contains of the present invention carries out according to the following steps:
1, the waste aluminium alloy that reclaims is cleaned with alkali lye, dried after being washed is removed the impurity on surface again;
2, metallic aluminium is placed process furnace internal heating to 850 ± 5 ℃ formation melt, the waste aluminium alloy that will remove impurity then is pressed in the melt to all fusings, again at 780 ± 5 ℃ of insulation 20 ~ 30min with bell jar; The add-on of waste aluminium alloy is 90 ~ 120% of a metallic aluminium gross weight;
3, Pure Silicon Metal, metallic copper, MAGNESIUM METAL 99, metallic zinc and Al-10La alloy are joined in the melt, at 780 ± 5 ℃ of insulation 20 ~ 30min;
4, in melt, feed argon gas and carry out degasification,, be cooled to 720 ± 5 ℃ when hydrogen richness reaches the 0.1mL/100g melt when following; Insulation 10 ~ 15min, cast obtains aluminium alloy cast ingot then, and its composition is Si10.5 ~ 13% by weight percentage; Mg0.5 ~ 3%, Cu 1.0 ~ 5.5%, Zn1 ~ 5.5%; La 0.2 ~ 0.4%, and surplus is an aluminium;
5, aluminium alloy cast ingot is carried out thermal pretreatment at 470 ± 5 ℃ of insulation 1 ~ 3h, rolling under 450 ± 5 ℃ of conditions then, compression ratio is 30 ~ 50%, obtains hot rolling aluminium alloy;
6, with hot rolling aluminium alloy at 320 ± 5 ℃ of anneal 120 ~ 150min, eliminate internal stress, be cooled to normal temperature then and carry out cold rollingly, compression ratio is 60 ~ 70%, obtains cold rolling duraluminum;
7, with cold rolling duraluminum solution treatment 4 ~ 24h under 480 ± 5 ℃ of conditions, Water Quenching is to normal temperature then;
8,, process and contain the magnesium high silicon wrought aluminium alloy of regenerating with the ageing treatment 4 ~ 24h under 150 ± 5 ℃ of conditions of the cold rolling duraluminum after the shrend.
Above-mentioned alkali lye is that weight concentration 5 ~ 10% and temperature are 65 ± 5 ℃ sodium hydroxide solution.
In the aforesaid method, when in melt, feeding argon gas, the pressure of argon gas is 0.2 ~ 0.25MPa.
The material of above-mentioned waste aluminium alloy is selected 6063 duraluminums for use.
The magnesium high silicon wrought aluminium alloy good combination property of regenerating that contains of the present invention, wear resistance is superior to the Al-12.6Si-0.3RE alloy; Method of the present invention utilizes aluminium scrap to mix with metallic aluminium to use preparation to contain the magnesium high silicon wrought aluminium alloy of regenerating; Can effectively utilize the aluminium scrap raw material; The adding price is lower than the silicon of aluminium, can reduce the cost of preparation alloy product, further increases economic efficiency; The adding of silicon can improve the tensile strength of alloy product, wear resistance, hardness and mechanical property; The MAGNESIUM METAL 99 price that adds is similar with aluminium, and density is littler than aluminium, in alloy, combines formation Mg with silicon
2The Si intermetallic compound can play the effect of the tensile strength, hardness and the wear resistance that improve alloy product; Metallic copper that adds and aluminium form Al
2The Cu intermetallic compound also can play the effect of the tensile strength, hardness and the wear resistance that improve alloy product; The metallic zinc that adds can play and improve the effect of alloy product flexible, improves alloy product intensity through solution strengthening and ageing strengthening effect; Can remove molten intravital hydrogen with argon gas refining and adding Rare Earth Lanthanum, and silicon is played metamorphism, improve the mechanical property of alloy product, reduce being mingled with and defective in the alloy.Method of the present invention has that cost is low, easy and simple to handle, good product performance, be suitable for the advantage of industrial-scale production, has a good application prospect.
Embodiment
Weight purity >=99.9% of the metallic copper that adopts in the embodiment of the invention, MAGNESIUM METAL 99, metallic zinc and Al-10La alloy, weight purity >=99.3% of metallic aluminium and Pure Silicon Metal.
The bulk purity of the argon gas that adopts in the embodiment of the invention >=99.98%.
The process furnace that adopts in the embodiment of the invention is a resistance furnace.
The alkali lye that adopts when alkali lye cleans in the embodiment of the invention is that weight concentration 5 ~ 10% and temperature are 65 ± 5 ℃ sodium hydroxide solution.
Embodiment 1
With material is that the recovery waste aluminium alloy of 6063 duraluminums cleans with alkali lye, and dried after being washed is removed the impurity on surface again;
Metallic aluminium is placed process furnace internal heating to 850 ± 5 ℃ formation melt, and the waste aluminium alloy that will remove impurity then is pressed in the melt to all fusings, again at 780 ± 5 ℃ of insulation 20min with bell jar; The add-on of waste aluminium alloy is 120% of a metallic aluminium gross weight;
Pure Silicon Metal, metallic copper, MAGNESIUM METAL 99, metallic zinc and Al-10La alloy are joined in the melt, at 780 ± 5 ℃ of insulation 20min;
The argon gas that in melt, feeds pressure and be 0.2 ~ 0.25MPa carries out degasification, when hydrogen richness reaches the 0.1mL/100g melt when following, is cooled to 720 ± 5 ℃; Insulation 10min, cast obtains aluminium alloy cast ingot then, and its composition is Si10.5% by weight percentage; Mg3%, Cu 1.0%, Zn5.5%; La 0.2%, and surplus is an aluminium;
Aluminium alloy cast ingot is carried out thermal pretreatment at 470 ± 5 ℃ of insulation 3h, and rolling under 450 ± 5 ℃ of conditions then, compression ratio is 50%, obtains hot rolling aluminium alloy;
Hot rolling aluminium alloy at 320 ± 5 ℃ of anneal 120min, is eliminated internal stress, be cooled to normal temperature then and carry out cold rollingly, compression ratio is 70%, obtains cold rolling duraluminum;
With cold rolling duraluminum solution treatment 8h under 480 ± 5 ℃ of conditions, Water Quenching is to normal temperature then;
With the ageing treatment 16h under 150 ± 5 ℃ of conditions of the cold rolling duraluminum after the shrend, process and contain the magnesium high silicon wrought aluminium alloy of regenerating; Tensile strength is 300MPa, and unit elongation δ is 11%, and hardness is 95HV, is superior to the Al-12.6Si-0.3RE alloy through the test wear resistance.
Embodiment 2
With material is that the recovery waste aluminium alloy of 6063 duraluminums cleans with alkali lye, and dried after being washed is removed the impurity on surface again;
Metallic aluminium is placed process furnace internal heating to 850 ± 5 ℃ formation melt, and the waste aluminium alloy that will remove impurity then is pressed in the melt to all fusings, again at 780 ± 5 ℃ of insulation 25min with bell jar; The add-on of waste aluminium alloy is 110% of a metallic aluminium gross weight;
Pure Silicon Metal, metallic copper, MAGNESIUM METAL 99, metallic zinc and Al-10La alloy are joined in the melt, at 780 ± 5 ℃ of insulation 25min;
The argon gas that in melt, feeds pressure and be 0.2 ~ 0.25MPa carries out degasification, when hydrogen richness reaches the 0.1mL/100g melt when following, is cooled to 720 ± 5 ℃; Insulation 12min, cast obtains aluminium alloy cast ingot then, and its composition is Si ~ 13% by weight percentage; Mg0.5%, Cu5.5%, Zn1%; La 0.4%, and surplus is an aluminium;
Aluminium alloy cast ingot is carried out thermal pretreatment at 470 ± 5 ℃ of insulation 2h, and rolling under 450 ± 5 ℃ of conditions then, compression ratio is 50%, obtains hot rolling aluminium alloy;
Hot rolling aluminium alloy at 320 ± 5 ℃ of anneal 130min, is eliminated internal stress, be cooled to normal temperature then and carry out cold rollingly, compression ratio is 70%, obtains cold rolling duraluminum;
With cold rolling duraluminum solution treatment 16h under 480 ± 5 ℃ of conditions, Water Quenching is to normal temperature then;
With the ageing treatment 8h under 150 ± 5 ℃ of conditions of the cold rolling duraluminum after the shrend, process and contain the magnesium high silicon wrought aluminium alloy of regenerating; Tensile strength is 320MPa, and unit elongation δ is 13%, and hardness is 102HV, is superior to the Al-12.6Si-0.3RE alloy through the test wear resistance.
Embodiment 3
With material is that the recovery waste aluminium alloy of 6063 duraluminums cleans with alkali lye, and dried after being washed is removed the impurity on surface again;
Metallic aluminium is placed process furnace internal heating to 850 ± 5 ℃ formation melt, and the waste aluminium alloy that will remove impurity then is pressed in the melt to all fusings, again at 780 ± 5 ℃ of insulation 30min with bell jar; The add-on of waste aluminium alloy is 100% of a metallic aluminium gross weight;
Pure Silicon Metal, metallic copper, MAGNESIUM METAL 99, metallic zinc and Al-10La alloy are joined in the melt, at 780 ± 5 ℃ of insulation 30min;
The argon gas that in melt, feeds pressure and be 0.2 ~ 0.25MPa carries out degasification, when hydrogen richness reaches the 0.1mL/100g melt when following, is cooled to 720 ± 5 ℃; Insulation 14min, cast obtains aluminium alloy cast ingot then, and its composition is Si12% by weight percentage; Mg1%, Cu 2%, Zn3%; La 0.3%, and surplus is an aluminium;
Aluminium alloy cast ingot is carried out thermal pretreatment at 470 ± 5 ℃ of insulation 1.5h, and rolling under 450 ± 5 ℃ of conditions then, compression ratio is 40%, obtains hot rolling aluminium alloy;
Hot rolling aluminium alloy at 320 ± 5 ℃ of anneal 140min, is eliminated internal stress, be cooled to normal temperature then and carry out cold rollingly, compression ratio is 65%, obtains cold rolling duraluminum;
With cold rolling duraluminum solid solution place 24h under 480 ± 5 ℃ of conditions, Water Quenching is to normal temperature then;
With the ageing treatment 24h under 150 ± 5 ℃ of conditions of the cold rolling duraluminum after the shrend, process and contain the magnesium high silicon wrought aluminium alloy of regenerating; Tensile strength is 260MPa, and unit elongation δ is 8%, and hardness is 90HV, is superior to the Al-12.6Si-0.3RE alloy through its wear resistance of test.
Embodiment 4
With material is that the recovery waste aluminium alloy of 6063 duraluminums cleans with alkali lye, and dried after being washed is removed the impurity on surface again;
Metallic aluminium is placed process furnace internal heating to 850 ± 5 ℃ formation melt, and the waste aluminium alloy that will remove impurity then is pressed in the melt to all fusings, again at 780 ± 5 ℃ of insulation 20min with bell jar; The add-on of waste aluminium alloy is 90% of a metallic aluminium gross weight;
Pure Silicon Metal, metallic copper, MAGNESIUM METAL 99, metallic zinc and Al-10La alloy are joined in the melt, at 780 ± 5 ℃ of insulation 20min;
The argon gas that in melt, feeds pressure and be 0.2 ~ 0.25MPa carries out degasification, when hydrogen richness reaches the 0.1mL/100g melt when following, is cooled to 720 ± 5 ℃; Insulation 15min, cast obtains aluminium alloy cast ingot then, and its composition is Si11% by weight percentage; Mg2%, Cu 4%, Zn3.5%; La 0.3%, and surplus is an aluminium;
Aluminium alloy cast ingot is carried out thermal pretreatment at 470 ± 5 ℃ of insulation 1h, and rolling under 450 ± 5 ℃ of conditions then, compression ratio is 30%, obtains hot rolling aluminium alloy;
Hot rolling aluminium alloy at 320 ± 5 ℃ of anneal 150min, is eliminated internal stress, be cooled to normal temperature then and carry out cold rollingly, compression ratio is 60%, obtains cold rolling duraluminum;
With cold rolling duraluminum solution treatment 4h under 480 ± 5 ℃ of conditions, Water Quenching is to normal temperature then;
With the ageing treatment 4h under 150 ± 5 ℃ of conditions of the cold rolling duraluminum after the shrend, process and contain the magnesium high silicon wrought aluminium alloy of regenerating; Tensile strength is 340MPa, and unit elongation δ is 15%, and hardness is 115HV, is superior to the Al-12.6Si-0.3RE alloy through its wear resistance of test.
Claims (5)
1. one kind contains the magnesium high silicon wrought aluminium alloy of regenerating, and it is characterized in that the composition of this alloy is Si10.5 ~ 13% by weight percentage, Mg0.5 ~ 3%, and Cu 1.0 ~ 5.5%, Zn1 ~ 5.5%, La 0.2 ~ 0.4%, and surplus is an aluminium.
2. a kind of magnesium high silicon wrought aluminium alloy of regenerating that contains according to claim 1 is characterized in that this tensile strength of alloys is 260 ~ 340MPa, and unit elongation δ is 8 ~ 15%, and hardness is 90 ~ 115HV.
3. described a kind of the regenerate preparation method of high silicon wrought aluminium alloy of magnesium that contains of claim 1 is characterized in that carrying out according to the following steps:
(1) waste aluminium alloy that reclaims is cleaned with alkali lye, dried after being washed is removed the impurity on surface again;
(2) metallic aluminium is placed process furnace internal heating to 850 ± 5 ℃ formation melt, the waste aluminium alloy that will remove impurity then is pressed in the melt to all fusings, again at 780 ± 5 ℃ of insulation 20 ~ 30min with bell jar; The add-on of waste aluminium alloy is 90 ~ 120% of a metallic aluminium gross weight;
(3) Pure Silicon Metal, metallic copper, MAGNESIUM METAL 99, metallic zinc and Al-10La alloy are joined in the melt, at 780 ± 5 ℃ of insulation 20 ~ 30min;
(4) in melt, feed argon gas and carry out degasification,, be cooled to 720 ± 5 ℃ when hydrogen richness reaches the 0.1mL/100g melt when following; Insulation 10 ~ 15min, cast obtains aluminium alloy cast ingot then, and its composition is Si10.5 ~ 13% by weight percentage; Mg0.5 ~ 3%, Cu 1.0 ~ 5.5%, Zn1 ~ 5.5%; La 0.2 ~ 0.4%, and surplus is an aluminium;
(5) aluminium alloy cast ingot is carried out thermal pretreatment at 470 ± 5 ℃ of insulation 1 ~ 3h, rolling under 450 ± 5 ℃ of conditions then, compression ratio is 30 ~ 50%, obtains hot rolling aluminium alloy;
(6) with hot rolling aluminium alloy at 320 ± 5 ℃ of anneal 120 ~ 150min, eliminate internal stress, be cooled to normal temperature then and carry out cold rollingly, compression ratio is 60 ~ 70%, obtains cold rolling duraluminum;
(7) with cold rolling duraluminum solution treatment 4 ~ 24h under 480 ± 5 ℃ of conditions, Water Quenching is to normal temperature then;
(8), process and contain the magnesium high silicon wrought aluminium alloy of regenerating with the ageing treatment 4 ~ 24h under 150 ± 5 ℃ of conditions of the cold rolling duraluminum after the shrend.
4. a kind of regenerate preparation method of high silicon wrought aluminium alloy of magnesium that contains according to claim 3, when it is characterized in that in melt, feeding argon gas, the pressure of argon gas is 0.2 ~ 0.25MPa.
5. a kind of regenerate preparation method of high silicon wrought aluminium alloy of magnesium that contains according to claim 3 is characterized in that the material of described waste aluminium alloy is selected 6063 duraluminums for use.
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Cited By (9)
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| CN102747256A (en) * | 2012-06-19 | 2012-10-24 | 东南大学 | Aluminum-silicon based aluminum section and preparation technology thereof |
| CN103526088A (en) * | 2013-09-29 | 2014-01-22 | 苏州利达铸造有限公司 | Aluminum die-casting alloy for digital electronic product |
| CN105112744A (en) * | 2015-10-08 | 2015-12-02 | 江苏佳铝实业股份有限公司 | Manufacturing process of high-silicon aluminum alloy plate |
| CN105624481A (en) * | 2016-03-28 | 2016-06-01 | 福建省科源新型材料有限公司 | Aluminium product preparation technology capable of reducing cost and energy consumption |
| CN105695811A (en) * | 2015-12-15 | 2016-06-22 | 东北大学 | Ti-containing high-silicon aluminum alloy capable of achieving aging strengthening and preparation method for deformation material of Ti-containing high-silicon aluminum alloy |
| CN106086541A (en) * | 2016-07-28 | 2016-11-09 | 南京信息工程大学 | A kind of aluminium alloy ingots |
| CN109280820A (en) * | 2018-10-26 | 2019-01-29 | 中国航发北京航空材料研究院 | It is a kind of for the high-strength aluminum alloy of increasing material manufacturing and its preparation method of powder |
| CN110832103A (en) * | 2017-07-06 | 2020-02-21 | 诺维尔里斯公司 | High performance aluminum alloys with high amounts of recycled materials and methods of making the same |
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| CN102747256A (en) * | 2012-06-19 | 2012-10-24 | 东南大学 | Aluminum-silicon based aluminum section and preparation technology thereof |
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| CN110832103B (en) * | 2017-07-06 | 2022-06-03 | 诺维尔里斯公司 | High performance aluminum alloys with high amounts of recycled materials and methods of making the same |
| CN109280820A (en) * | 2018-10-26 | 2019-01-29 | 中国航发北京航空材料研究院 | It is a kind of for the high-strength aluminum alloy of increasing material manufacturing and its preparation method of powder |
| CN109280820B (en) * | 2018-10-26 | 2021-03-26 | 中国航发北京航空材料研究院 | High-strength aluminum alloy for additive manufacturing and preparation method of powder of high-strength aluminum alloy |
| CN115874032A (en) * | 2022-12-19 | 2023-03-31 | 东北轻合金有限责任公司 | Manufacturing method of high-silicon aluminum alloy plate quenched by air cushion furnace |
| CN115874032B (en) * | 2022-12-19 | 2023-12-01 | 东北轻合金有限责任公司 | Manufacturing method of high-silicon aluminum alloy sheet quenched by air cushion furnace |
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