CN102925768A - Production method of powder-coated aluminum alloy section bars - Google Patents
Production method of powder-coated aluminum alloy section bars Download PDFInfo
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- CN102925768A CN102925768A CN2012103083581A CN201210308358A CN102925768A CN 102925768 A CN102925768 A CN 102925768A CN 2012103083581 A CN2012103083581 A CN 2012103083581A CN 201210308358 A CN201210308358 A CN 201210308358A CN 102925768 A CN102925768 A CN 102925768A
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Abstract
The invention disclosed a production method of powder-coated aluminum alloy section bars. The production method comprises the steps of aluminum ingot and other raw material preparation, aluminum alloy round ingot smelting and casting; casting and sawing; annealing treatment; extrusion molding, electrostatic powder spraying, baking, and the like. According to the invention, waste aluminum material is added into the raw materials, such that aluminum section bar property stability can be promoted, and the possibility of influences on aluminum section bar qualities caused by undetected materials appeared at molten aluminum smelting is reduced. The formula is further optimized, such that aluminum alloy strength and harness are improved, and comprehensive performance of the aluminum alloy section bars can be improved. The surfaces of the aluminum alloy section bars are subjected to chromium processing, such that corrosion resistance of oxide films on surfaces of the aluminum alloy section bars is improved, and the bonding force of the aluminum alloy section bars and the coatings is improved.
Description
Technical field
The present invention relates to a kind of production method of powder spraying 7050 aluminium alloy extrusions, belong to the aluminum alloy materials processing technique field.
Background technology
7050 line aluminium alloy main alloy element are zinc, belong to the high strength Heat tratable alloy, have the performance of the corrosion of high intensity and antistripping and stress corrosion resistant fracture.Be widely used in aircraft structure and be used for plate of moderate thickness extrusion, flat-die forging piece and stamp work.At present, it is unstable that the section bar that is processed into by 5025 aluminium alloys also has over-all properties, the shortcoming such as antistripping is poor.
Summary of the invention
The objective of the invention is for the deficiencies in the prior art, a kind of production method of powder spraying 7050 aluminium alloy extrusions is provided, improve the over-all properties of aluminium alloy extrusions.
The technical solution used in the present invention is as follows:
The production method of powder spraying 7050 aluminium alloy extrusions is characterized in that, comprises the steps such as aluminium ingot and other feed proportioning, melting and casting aluminum alloy round ingot, casting and sawing, anneal, extrusion molding, electrostatic powder coating, baking, and concrete steps are as follows:
(1) aluminium ingot and other feed proportioning
By following raw materials in part by weight: aluminium section bar waste product and other aluminium scrap, 5-10 nano alumina powder, 5-10 nano ceramic powder that 60-70 aluminium ingot, 30-40 reclaim carry out proportioning;
(2) melting and casting aluminum alloy round ingot
Aluminium section bar waste product and other aluminium scrap input smelting furnace with aluminium ingot, zinc ingot metal, copper ingot, recovery carries out melting first, when treating that it becomes molten state, add nano alumina powder and nano ceramic powder, make it uniformly dispersing, then drop into an amount of AlTiB grain-refining agent and carry out refining, at last by degasification, skim assorted slag, gas in the melt effectively removed; Detect also by control alloying element addition, so that wherein the quality percentage composition of each element is: Si≤0.12%, Mg 1.9-2.6%, Fe≤0.15%, Cu 2.0-2.6%, Mn≤0.10%, Cr≤0.04%, Zn 5.7-6.7%, Ti≤0.06%, Zr0.08-0.15%, other elements add up to≤0.15%, all the other are Al;
(3) casting and sawing
Before the casting melted aluminium liquid was left standstill 20-30 minute, the relief hole of aluminium liquid by smelting furnace entered crystallizer through the aluminium groove, cast out needed aluminium billet and get model, be cooled to normal temperature, then as required the sawing of aluminium billet is become certain length;
(4) anneal
Carrying out homogenizing annealing after the sawing of aluminium billet processes, detailed process is as follows: be warming up to first under 300-320 ℃, be incubated 2-3 hour, per hour 70-90 ℃ of intensification is heated to 520-550 ℃ of lower insulation 6-8 hour, then air cooling, per hour 60-80 ℃ of intensification is heated to 360-380 ℃ again, and insulation degree 5-6 hour; Be cooled to again 150-180 ℃ of lower insulation 3-4 hour;
(5) extrusion molding
Billet is heated to 450-460 ℃, is incubated 2-3 hour, the round casting rod extrusion molding from mould that then utilizes extrusion machine to heat, 220-240 ℃ of extrusion mould temperature, extrusion speed 10-12 m/min; Air-cooled section bar surface temperature is put into 0-5 ℃ of water and was carried out quench treatment 1-2 minute after 110-130 ℃, the backward wherein maintenance water temperature on the rocks of water temperature rising; Good aluminium alloy extrusions carried out normal temperature alignment processing to take out extruding at last from water, 120-130 ℃ of lower insulation 3-4 hour;
(6) electrostatic powder coating
The aluminium alloy extrusions base material is sprayed on electrostatic powder coating on the aluminium alloy extrusions by spray gun after the pre-treatment such as grease-removing agent cleaning, chromaking agent chromaking;
(7) baking
Aluminium alloy extrusions behind the spray coating powder paint placed in 135-150 ℃ the curing oven 20-30 minute, and dried and namely get the present invention's 7050 aluminium alloy extrusions after complete.
The fineness of described nano alumina powder is 2-4 nm.
Described nano ceramic powder is by following raw materials in part by weight: 2-5 quartzite, 2-5 barite, 5-10 rhombspar, 5-10 sepiolite are behind broken, pulverizing and screening process, at 600-700 ℃ of lower scaling loss 4-5 hour, grind to form at last nanometer powder, the fineness of described nano ceramic powder is 3-5 nm.
Added the aluminium scrap material in the feed proportioning of the present invention, because the aluminium scrap material is through primary smelting, its stable components, increase aluminium scrap material is conducive to the aluminium section bar stable performance in the prescription therefore do not invent, and appearance does not have the possibility of the Effect of Materials aluminium section bar quality of detection when having reduced the smelting of aluminium liquid; Adjust the usage ratio of relevant composition in the aluminium prescription, increased intensity and the hardness of aluminium alloy, be conducive to improve the over-all properties of aluminium alloy extrusions; The steps such as anneal, quench treatment, alignment processing have increased the homogeneity of interior tissue of aluminum and the refinement of crystal grain, have greatly improved quality and the processing characteristics of aluminium alloy extrusions; Aluminium alloy section surface is carried out chromate treating, improved the resistance to corrosion of aluminium alloy section surface oxide film and the bonding force of aluminium alloy extrusions and coating.
Description of drawings
Fig. 1 is powder spraying aluminium alloy extrusions production-line technique schema.
Fig. 2 is pretreatment process process flow sheet before the electrostatic powder coating.
Embodiment
The invention will be further described below in conjunction with executing example, but be not limited to the following example.
Embodiment 1
(1) aluminium ingot and other feed proportioning
By following raw materials in part by weight: the aluminium section bar waste product of 60 parts of aluminium ingots, 40 parts of recovery and other aluminium scrap, 5 parts of nano alumina powders, 10 parts of nano ceramic powders carry out proportioning;
(2) melting and casting aluminum alloy round ingot
Aluminium section bar waste product and other aluminium scrap input smelting furnace with aluminium ingot, zinc ingot metal, copper ingot, recovery carries out melting first, when treating that it becomes molten state, add nano alumina powder and nano ceramic powder, make it uniformly dispersing, then drop into an amount of AlTiB grain-refining agent and carry out refining, at last by degasification, skim assorted slag, gas in the melt effectively removed; Detect also by control alloying element addition, so that wherein the quality percentage composition of each element is: Si≤0.12%, Mg 1.9-2.6%, Fe≤0.15%, Cu 2.0-2.6%, Mn≤0.10%, Cr≤0.04%, Zn 5.7-6.7%, Ti≤0.06%, Zr0.08-0.15%, other elements add up to≤0.15%, all the other are Al;
(3) casting and sawing
Before the casting melted aluminium liquid was left standstill 30 minutes, the relief hole of aluminium liquid by smelting furnace entered crystallizer through the aluminium groove, cast out needed aluminium billet and get model, be cooled to normal temperature, then as required the sawing of aluminium billet is become certain length;
(4) anneal
Carry out homogenizing annealing after the sawing of aluminium billet and process, detailed process is as follows: be warming up to first under 300 ℃, be incubated 3 hours, per hour 70 ℃ of intensifications are heated to 520 ℃ of lower insulations 6 hours, then air cooling, per hour 60 ℃ of intensifications are heated to 360 ℃ again, and insulation degree 5 hours; Be cooled to again 150 ℃ of lower insulations 3 hours;
(5) extrusion molding
Billet is heated to 450 ℃, is incubated 3 hours, the round casting rod extrusion molding from mould that then utilizes extrusion machine to heat, 220 ℃ of extrusion mould temperature, 10 m/mins of extrusion speeds; After the air-cooled section bar surface temperature to 110 ℃, put into 2 ℃ of water and carried out quench treatment 2 minutes, the water temperature backward wherein maintenance water temperature on the rocks that raises; Good aluminium alloy extrusions carried out normal temperature alignment processing to take out extruding at last from water, 120 ℃ of lower insulations 3 hours;
(6) electrostatic powder coating
The aluminium alloy extrusions base material is sprayed on electrostatic powder coating on the aluminium alloy extrusions by spray gun after the pre-treatment such as grease-removing agent cleaning, chromaking agent chromaking;
(7) baking
Aluminium alloy extrusions behind the spray coating powder paint placed in 135 ℃ the curing oven 30 minutes, and dried and namely get the present invention's 7050 aluminium alloy extrusions after complete.
The fineness of described nano alumina powder is 3 nm.
Described nano ceramic powder is by following raw materials in part by weight: 3 quartzites, 3 barites, 5 rhombspars, 5 sepiolites are behind broken, pulverizing and screening process, 700 ℃ of lower scaling loss 5 hours, grind to form at last nanometer powder, the fineness of described nano ceramic powder is 5 nm.
After testing, the product chemical composition is: Si 0.0986%, Mg 2.25%, Fe 0.0674%, Cu 2.354%, Mn 0.0451%, Cr 0.0246%, Zn 6.342%, Ti 0.0275%, Zr 0.0976%, other elements add up to 0.0768%, all the other are Al; Mechanical property is: tensile strength is 348MPa, and yield strength is 254MPa, and unit elongation is 17.1%; Surface property is: the local thickness 28 μ m of single-piece, sand trial wear factor 563 g/ μ m, drop alkali test 145s.
Embodiment 2
(1) aluminium ingot and other feed proportioning
By following raw materials in part by weight: the aluminium section bar waste product of 70 parts of aluminium ingots, 30 parts of recovery and other aluminium scrap, 10 parts of nano alumina powders, 10 parts of nano ceramic powders carry out proportioning;
(2) melting and casting aluminum alloy round ingot
First with aluminium ingot, zinc ingot metal, copper ingot, the aluminium section bar waste product that reclaims and other aluminium scrap drop into smelting furnace and carry out melting, temperature is controlled at 750 ℃, when treating that it becomes molten state, add nano alumina powder and nano ceramic powder, make it uniformly dispersing, then drop into an amount of AlTiB grain-refining agent and carry out refining, wherein the quality percentage composition of each element is: Si≤0.12%, Mg 1.9-2.6%, Fe≤0.15%, Cu 2.0-2.6%, Mn≤0.10%, Cr≤0.04%, Zn 5.7-6.7%, Ti≤0.06%, Zr 0.08-0.15%, other elements add up to≤0.15%, all the other are Al, at last by degasification, skim the assorted slag in the melt, gas is effectively removed;
(3) casting and sawing
Before the casting melted aluminium liquid was left standstill 30 minutes, the relief hole of aluminium liquid by smelting furnace entered crystallizer through the aluminium groove, cast out needed aluminium billet and get model, be cooled to normal temperature, then as required the sawing of aluminium billet is become certain length;
(4) anneal
Carry out homogenizing annealing after the sawing of aluminium billet and process, detailed process is as follows: be warming up to first under 320 ℃, be incubated 3 hours, per hour 90 ℃ of intensifications are heated to 550 ℃ of lower insulations 8 hours, then air cooling, per hour 80 ℃ of intensifications are heated to 380 ℃ again, and insulation degree 6 hours; Be cooled to again 180 ℃ of lower insulations 4 hours;
(5) extrusion molding
Billet is heated to 460 ℃, is incubated 3 hours, the round casting rod extrusion molding from mould that then utilizes extrusion machine to heat, 240 ℃ of extrusion mould temperature, 12 m/mins of extrusion speeds; After the air-cooled section bar surface temperature to 130 ℃, put into 0 ℃ of water and carried out quench treatment 2 minutes, the water temperature backward wherein maintenance water temperature on the rocks that raises; Good aluminium alloy extrusions carried out normal temperature alignment processing to take out extruding at last from water, 130 ℃ of lower insulations 4 hours;
(6) electrostatic powder coating
The aluminium alloy extrusions base material is sprayed on electrostatic powder coating on the aluminium alloy extrusions by spray gun after the pre-treatment such as grease-removing agent cleaning, chromaking agent chromaking;
(7) baking
Aluminium alloy extrusions behind the spray coating powder paint placed in 150 ℃ the curing oven 20 minutes, and dried and namely get the present invention's 7050 aluminium alloy extrusions after complete.
The fineness of described nano alumina powder is 3 nm.
Described nano ceramic powder is by following raw materials in part by weight: 5 quartzites, 5 barites, 10 rhombspars, 10 sepiolites are behind broken, pulverizing and screening process, 700 ℃ of lower scaling loss 5 hours, grind to form at last nanometer powder, the fineness of described nano ceramic powder is 5 nm.
After testing, the product chemical composition is: Si 0.121%, Mg 2.37%, Fe 0.0712%, Cu 2.387%, Mn 0.0491%, Cr 0.0308%, Zn 6.735%, Ti 0.0289%, Zr 0.0113%, other elements add up to 0.0827%, all the other are Al; Mechanical property is: tensile strength is 355MPa, and yield strength is 262MPa, and unit elongation is 17.6%; Surface property is: the local thickness 29 μ m of single-piece, sand trial wear factor 571 g/ μ m, drop alkali test 152s.
Claims (3)
1. the production method of powder spraying aluminium alloy extrusions is characterized in that, comprises the steps such as aluminium ingot and other feed proportioning, melting and casting aluminum alloy round ingot, casting and sawing, anneal, extrusion molding, electrostatic powder coating, baking, and concrete steps are as follows:
(1) aluminium ingot and other feed proportioning
By following raw materials in part by weight: aluminium section bar waste product and other aluminium scrap, 5-10 nano alumina powder, 5-10 nano ceramic powder that 60-70 aluminium ingot, 30-40 reclaim carry out proportioning;
(2) melting and casting aluminum alloy round ingot
Aluminium section bar waste product and other aluminium scrap input smelting furnace with aluminium ingot, zinc ingot metal, copper ingot, recovery carries out melting first, when treating that it becomes molten state, add nano alumina powder and nano ceramic powder, make it uniformly dispersing, then drop into an amount of AlTiB grain-refining agent and carry out refining, at last by degasification, skim assorted slag, gas in the melt effectively removed; Detect also by control alloying element addition, so that wherein the quality percentage composition of each element is: Si≤0.12%, Mg 1.9-2.6%, Fe≤0.15%, Cu 2.0-2.6%, Mn≤0.10%, Cr≤0.04%, Zn 5.7-6.7%, Ti≤0.06%, Zr0.08-0.15%, other elements add up to≤0.15%, all the other are Al;
(3) casting and sawing
Before the casting melted aluminium liquid was left standstill 20-30 minute, the relief hole of aluminium liquid by smelting furnace entered crystallizer through the aluminium groove, cast out needed aluminium billet and get model, be cooled to normal temperature, then as required the sawing of aluminium billet is become certain length;
(4) anneal
Carrying out homogenizing annealing after the sawing of aluminium billet processes, detailed process is as follows: be warming up to first under 300-320 ℃, be incubated 2-3 hour, per hour 70-90 ℃ of intensification is heated to 520-550 ℃ of lower insulation 6-8 hour, then air cooling, per hour 60-80 ℃ of intensification is heated to 360-380 ℃ again, and insulation degree 5-6 hour; Be cooled to again 150-180 ℃ of lower insulation 3-4 hour;
(5) extrusion molding
Billet is heated to 450-460 ℃, is incubated 2-3 hour, the round casting rod extrusion molding from mould that then utilizes extrusion machine to heat, 220-240 ℃ of extrusion mould temperature, extrusion speed 10-12 m/min; Air-cooled section bar surface temperature is put into 0-5 ℃ of water and was carried out quench treatment 1-2 minute after 110-130 ℃, the backward wherein maintenance water temperature on the rocks of water temperature rising; Good aluminium alloy extrusions carried out normal temperature alignment processing to take out extruding at last from water, 120-130 ℃ of lower insulation 3-4 hour;
(6) electrostatic powder coating
The aluminium alloy extrusions base material is sprayed on electrostatic powder coating on the aluminium alloy extrusions by spray gun after the pre-treatment such as grease-removing agent cleaning, chromaking agent chromaking;
(7) baking
Aluminium alloy extrusions behind the spray coating powder paint placed in 135-150 ℃ the curing oven 20-30 minute, and dried and namely get the present invention's 7050 aluminium alloy extrusions after complete.
2. the production method of powder spraying aluminium alloy extrusions according to claim 1 is characterized in that, the fineness of described nano alumina powder is 2-4 nm.
3. the production method of powder spraying aluminium alloy extrusions according to claim 1, it is characterized in that, described nano ceramic powder is by following raw materials in part by weight: 2-5 quartzite, 2-5 barite, 5-10 rhombspar, 5-10 sepiolite are behind broken, pulverizing and screening process, at 600-700 ℃ of lower scaling loss 4-5 hour, grind to form at last nanometer powder, the fineness of described nano ceramic powder is 3-5 nm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103805815A (en) * | 2014-01-26 | 2014-05-21 | 柳州豪祥特科技有限公司 | Preparation method of aluminum alloy for buildings |
| CN103805986A (en) * | 2014-01-26 | 2014-05-21 | 柳州豪祥特科技有限公司 | Method for producing aluminum alloy material by using electrostatic powder spraying process |
| CN105401024A (en) * | 2015-11-24 | 2016-03-16 | 安徽鑫发铝业有限公司 | High-strength corrosion-resistant aluminum alloy section bar for doors and windows |
| CN106269956A (en) * | 2016-08-18 | 2017-01-04 | 新昌县日佳铜业有限公司 | A kind of shaping process of light-alloy section bar |
| CN108161337A (en) * | 2018-04-09 | 2018-06-15 | 安徽唯诗杨信息科技有限公司 | A kind of aluminium section material processing method and its processing positioning device |
| CN112210743A (en) * | 2020-09-30 | 2021-01-12 | 美图（福建）铝业有限公司 | Aluminum alloy section and manufacturing method thereof |
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| CN1760497A (en) * | 2004-10-15 | 2006-04-19 | 上海振兴铝业有限公司 | Weatherproof color shape bars in aluminium alloy, and manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103805815A (en) * | 2014-01-26 | 2014-05-21 | 柳州豪祥特科技有限公司 | Preparation method of aluminum alloy for buildings |
| CN103805986A (en) * | 2014-01-26 | 2014-05-21 | 柳州豪祥特科技有限公司 | Method for producing aluminum alloy material by using electrostatic powder spraying process |
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| CN106269956A (en) * | 2016-08-18 | 2017-01-04 | 新昌县日佳铜业有限公司 | A kind of shaping process of light-alloy section bar |
| CN108161337A (en) * | 2018-04-09 | 2018-06-15 | 安徽唯诗杨信息科技有限公司 | A kind of aluminium section material processing method and its processing positioning device |
| CN112210743A (en) * | 2020-09-30 | 2021-01-12 | 美图（福建）铝业有限公司 | Aluminum alloy section and manufacturing method thereof |
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