CN102828073B - Method for producing powder-coated aluminum alloy section - Google Patents
Method for producing powder-coated aluminum alloy section Download PDFInfo
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- CN102828073B CN102828073B CN201210308409.0A CN201210308409A CN102828073B CN 102828073 B CN102828073 B CN 102828073B CN 201210308409 A CN201210308409 A CN 201210308409A CN 102828073 B CN102828073 B CN 102828073B
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- alloy extrusions
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 56
- 239000000843 powder Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 62
- 238000001125 extrusion Methods 0.000 claims abstract description 55
- 238000005266 casting Methods 0.000 claims abstract description 20
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000003723 Smelting Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000002699 waste material Substances 0.000 claims abstract description 9
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 239000004411 aluminium Substances 0.000 claims description 58
- 239000000919 ceramic Substances 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007872 degassing Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 235000012222 talc Nutrition 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- -1 baking Substances 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 235000015076 Shorea robusta Nutrition 0.000 description 2
- 244000166071 Shorea robusta Species 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Abstract
The invention discloses a method for producing a powder-coated aluminum alloy section. The method includes steps of preparing an aluminum ingot and other raw materials; smelting and casting an aluminum alloy round ingot; pouring and sawing; annealing; carrying out extrusion forming; carrying out electrostatic powder coating; baking and the like. Waste aluminum materials are added into raw material ingredients, stability of performance of the aluminum alloy section is facilitated, and possibility that undetected materials are generated during smelting of molten aluminum and affect the quality of the aluminum alloy section is reduced. Besides, surfaces of the aluminum alloy section are subjected to chromation, so that corrosion resistance of oxide films on the surfaces of the aluminum alloy section is improved, and binding force of the aluminum alloy section and coatings is increased.
Description
Technical field
The present invention relates to a kind of production method of powder spraying aluminium alloy extrusions, belong to the aluminum alloy materials processing technique field.
Background technology
Existing aluminium alloy extrusions kind is a lot, generally, in the type of production material, aluminium alloy is heat-treated fairly simplely, so cause the performance of aluminium alloy type material not good, affects its result of use.
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 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 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 ceramic powder that 60-70 aluminium ingot, 30-40 reclaim carry out proportioning;
The melting and casting aluminum alloy round ingot
First the aluminium section bar waste product of aluminium ingot, recovery and other aluminium scrap input smelting furnace are carried out to melting, temperature is controlled at 700-750 ℃, when it becomes molten state, add nano ceramic powder, make it uniformly dispersing, then drop into appropriate AlTiB grain-refining agent and carry out refining, finally by degasification, skim assorted slag, gas in melt effectively removed;
(2) casting and sawing
Before casting, by the melted standing 20-30 minute of aluminium liquid, the relief hole aluminium liquid by smelting furnace enters crystallizer through the aluminium groove, casts out needed aluminium billet and obtains model, is cooled to normal temperature, then as required the sawing of aluminium billet is become to certain length;
(3) anneal
Carry out the homogenizing annealing processing after the sawing of aluminium billet, detailed process is as follows: first be warming up under 300-320 ℃, insulation 2-3 hour, per hour 70-90 ℃ of intensification is heated to insulation 6-8 hour under 520-550 ℃, 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 insulation 3-4 hour under 150-180 ℃;
(4) extrusion molding
Billet is heated to 450-460 ℃, insulation 2-3 hour, the round casting rod extrusion molding from mould that then utilizes extrusion machine to heat, extrusion mould temperature 220-240 ℃, extrusion speed 10-12 m/min; Air-cooled section bar surface temperature, after 110-130 ℃, is put into 0-5 ℃ of water and is carried out quench treatment 1-2 minute, maintenance water temperature on the rocks wherein after water temperature raises; The last aluminium alloy extrusions pushed that takes out from water carries out normal temperature alignment processing, insulation 3-4 hour under 120-130 ℃;
(5) electrostatic powder coating
The aluminium alloy extrusions base material, after the pre-treatment such as grease-removing agent cleaning, chromaking agent chromaking, is sprayed on electrostatic powder coating on aluminium alloy extrusions by spray gun;
(6) baking
Aluminium alloy extrusions after spray coating powder paint is placed in to 20-30 minute in the curing oven of 135-150 ℃, obtains aluminium alloy extrusions of the present invention after oven dry.
The production method of described heat-tinting electrophoretic painting aluminium alloy extrusions, it is characterized in that, described nano ceramic powder is by following raw materials in part by weight: 2-5 siliceous shale, 2-5 bauxitic clay, 5-10 rhombspar, 5-10 talcum are after broken, pulverizing and screening process, at 600-700 ℃ of lower scaling loss 4-5 hour, finally grind to form nanometer powder, the fineness of described nano ceramic powder is 3-5 nm.
Added the aluminium scrap material in feed proportioning of the present invention, due to the primary smelting of aluminium scrap material process, its stable components, be conducive to the aluminium section bar stable performance therefore invent increase aluminium scrap material in formula, and while having reduced the smelting of aluminium liquid, appearance does not have the possibility of the Effect of Materials aluminium section bar quality of detection; Adjust the usage ratio of relevant composition in the aluminium formula, the steps such as anneal, quench treatment, alignment processing, increased the homogeneity of interior tissue of aluminum and the refinement of crystal grain, greatly improved quality and the processing characteristics of aluminium alloy extrusions; Aluminium alloy section surface is carried out to chromate treating, improved the resistance to corrosion of aluminium alloy section surface oxide film and the bonding force of aluminium alloy extrusions and coating.
The accompanying drawing explanation
Fig. 1 is powder spraying aluminium alloy extrusions production-line technique schema.
Fig. 2 is pretreatment process process flow sheet before electrostatic powder coating.
Embodiment
Below in conjunction with executing example, the invention will be further described, 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: 60 aluminium ingots, 40 aluminium section bar waste product and other aluminium scrap, 7 nano ceramic powders that reclaim carry out proportioning;
(2) melting and casting aluminum alloy round ingot
First the aluminium section bar waste product of aluminium ingot, recovery and other aluminium scrap input smelting furnace are carried out to melting, temperature is controlled at 720 ℃, when it becomes molten state, add nano ceramic powder, make it uniformly dispersing, then drop into appropriate AlTiB grain-refining agent and carry out refining, finally by degasification, skim assorted slag, gas in melt effectively removed;
(3) casting and sawing
Before casting, by standing 25 minutes of melted aluminium liquid, the relief hole aluminium liquid by smelting furnace entered crystallizer through the aluminium groove, casts out needed aluminium billet and obtains model, is cooled to normal temperature, then as required the sawing of aluminium billet is become to certain length;
(4) anneal
Carry out the homogenizing annealing processing after the sawing of aluminium billet, detailed process is as follows: first be warming up under 300 ℃, be incubated 3 hours, per hour 70 ℃ of intensifications are heated to be incubated 7 hours under 520 ℃, then air cooling, more per hour 60 ℃ of intensifications are heated to 360 ℃, and insulation degree 5 hours; Be cooled to again under 150 ℃ and be incubated 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 air-cooled section bar surface temperature to 110 ℃, put into 2 ℃ of water and carry out quench treatment 2 minutes, water temperature maintenance water temperature on the rocks wherein after raising; The last aluminium alloy extrusions pushed that takes out from water carries out normal temperature alignment processing, and under 120 ℃, insulation is 4 hours;
(6) electrostatic powder coating
The aluminium alloy extrusions base material, after the pre-treatment such as grease-removing agent cleaning, chromaking agent chromaking, is sprayed on electrostatic powder coating on aluminium alloy extrusions by spray gun;
(7) baking
Aluminium alloy extrusions after spray coating powder paint is placed in the curing oven of 140 ℃ 20 minutes, obtains aluminium alloy extrusions of the present invention after oven dry.
Described nano ceramic powder is by following raw materials in part by weight: 3 siliceous shales, 3 bauxitic clays, 8 rhombspars, 8 talcums are after broken, pulverizing and screening process, 700 ℃ of lower scaling loss 5 hours, finally grind to form nanometer powder, the fineness of described nano ceramic powder is 5 nm.
After testing, mechanical property is: tensile strength is 308MPa, and yield strength is 256MPa, and unit elongation is 16.4%; Surface property is: the local thickness 26 μ m of single-piece, sand trial wear factor 551 g/ μ m, drop alkali test 132s.
Embodiment 2
(1) aluminium ingot and other feed proportioning
By following raw materials in part by weight: 70 aluminium ingots, 30 aluminium section bar waste product and other aluminium scrap, 10 norbides, 10 nano ceramic powders that reclaim carry out proportioning, and wherein the quality percentage composition of each element is: Si≤0.25%, Mg 2.2-2.8%, Fe≤0.40%, Cu≤0.10%, Mn≤0.10%, Cr 0.15-0.35%, Zn≤0.10%, other elements add up to≤0.15, all the other are Al;
(2) melting and casting aluminum alloy round ingot
First the aluminium section bar waste product of aluminium ingot, recovery and other aluminium scrap input smelting furnace are carried out to melting, temperature is controlled at 750 ℃, when it becomes molten state, add norbide and nano ceramic powder, make it uniformly dispersing, then drop into appropriate AlTiB grain-refining agent and carry out refining, finally by degasification, skim assorted slag, gas in melt effectively removed;
(3) casting and sawing
Before casting, by standing 30 minutes of melted aluminium liquid, the relief hole aluminium liquid by smelting furnace entered crystallizer through the aluminium groove, casts out needed aluminium billet and obtains model, is cooled to normal temperature, then as required the sawing of aluminium billet is become to certain length;
(4) anneal
Carry out the homogenizing annealing processing after the sawing of aluminium billet, detailed process is as follows: first be warming up under 320 ℃, be incubated 3 hours, per hour 90 ℃ of intensifications are heated to be incubated 8 hours under 550 ℃, then air cooling, more per hour 80 ℃ of intensifications are heated to 380 ℃, and insulation degree 6 hours; Be cooled to again under 180 ℃ and be incubated 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 air-cooled section bar surface temperature to 130 ℃, put into 0 ℃ of water and carry out quench treatment 2 minutes, water temperature maintenance water temperature on the rocks wherein after raising; The last aluminium alloy extrusions pushed that takes out from water carries out normal temperature alignment processing, and under 130 ℃, insulation is 4 hours;
(6) electrostatic powder coating
The aluminium alloy extrusions base material, after the pre-treatment such as grease-removing agent cleaning, chromaking agent chromaking, is sprayed on electrostatic powder coating on aluminium alloy extrusions by spray gun;
(7) baking
Aluminium alloy extrusions after spray coating powder paint is placed in the curing oven of 150 ℃ 30 minutes, obtains aluminium alloy extrusions of the present invention after oven dry.
Described nano ceramic powder is by following raw materials in part by weight: 5 siliceous shales, 5 bauxitic clays, 10 rhombspars, 10 talcums are after broken, pulverizing and screening process, 700 ℃ of lower scaling loss 5 hours, finally grind to form nanometer powder, the fineness of described nano ceramic powder is 5 nm.
After testing, mechanical property is: tensile strength is 314MPa, and yield strength is 263MPa, and unit elongation is 16.8%; Surface property is: the local thickness 25 μ m of single-piece, sand trial wear factor 559 g/ μ m, drop alkali test 136s.
Claims (2)
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 ceramic powder that 60-70 aluminium ingot, 30-40 reclaim carry out proportioning;
(2) melting and casting aluminum alloy round ingot
First the aluminium section bar waste product of aluminium ingot, recovery and other aluminium scrap input smelting furnace are carried out to melting, temperature is controlled at 700-750 ℃, when it becomes molten state, add nano ceramic powder, make it uniformly dispersing, then drop into appropriate AlTiB grain-refining agent and carry out refining, finally by degasification, skim assorted slag, gas in melt effectively removed;
(3) casting and sawing
Before casting, by the melted standing 20-30 minute of aluminium liquid, the relief hole aluminium liquid by smelting furnace enters crystallizer through the aluminium groove, casts out the model of needed aluminum alloy round ingot, is cooled to normal temperature, then as required the aluminum alloy round ingot sawing is become to certain length;
(4) anneal
Carry out the homogenizing annealing processing after the aluminum alloy round ingot sawing, detailed process is as follows: first be warming up under 300-320 ℃, insulation 2-3 hour, per hour 70-90 ℃ of intensification is heated to insulation 6-8 hour under 520-550 ℃, then air cooling, per hour 60-80 ℃ of intensification is heated to 360-380 ℃ again, and insulation 5-6 hour; Be cooled to again insulation 3-4 hour under 150-180 ℃;
(5) extrusion molding
Aluminum alloy round ingot is heated to 450-460 ℃, and insulation 2-3 hour, then utilize extrusion machine by the aluminum alloy round ingot extrusion molding from mould heated, extrusion mould temperature 220-240 ℃, extrusion speed 10-12 m/min; Air-cooled section bar surface temperature, after 110-130 ℃, is put into 0-5 ℃ of water and is carried out quench treatment 1-2 minute, maintenance water temperature on the rocks wherein after water temperature raises; The last aluminium alloy extrusions pushed that takes out from water carries out normal temperature alignment processing, insulation 3-4 hour under 120-130 ℃;
(6) electrostatic powder coating
The aluminium alloy extrusions base material, after the pre-treatment such as grease-removing agent cleaning, chromaking agent chromaking, is sprayed on electrostatic powder coating on aluminium alloy extrusions by spray gun;
(7) baking
Aluminium alloy extrusions after spray coating powder paint is placed in to 20-30 minute in the curing oven of 135-150 ℃, obtains aluminium alloy extrusions of the present invention after oven dry.
2. 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 siliceous shale, 2-5 bauxitic clay, 5-10 rhombspar, 5-10 talcum are after broken, pulverizing and screening process, at 600-700 ℃ of lower scaling loss 4-5 hour, finally grind to form nanometer powder, the fineness of described nano ceramic powder is 3-5 nm.
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| CN103556017A (en) * | 2013-11-20 | 2014-02-05 | 江苏江旭铸造集团有限公司 | High-temperature-resistant casting aluminum alloy |
| CN103835623B (en) * | 2014-03-20 | 2015-09-09 | 陆明军 | A kind of bridge insulation thermal resistance aluminium section spraying goods |
| CN103923459B (en) * | 2014-03-20 | 2016-06-01 | 安徽鼎能节能设备有限公司 | The preparation method of the powder spraying heat-insulation aluminum section of a kind of surface carving |
| CN103865253B (en) * | 2014-03-20 | 2016-08-17 | 中山市建平铝制品有限公司 | A kind of heat-insulation aluminum section |
| CN103831183B (en) * | 2014-03-20 | 2016-04-20 | 湖州巨力铝型材有限公司 | A kind of heat-insulation aluminum section of surface-engraved |
| CN104307716A (en) * | 2014-09-23 | 2015-01-28 | 太仓万冠涂装设备有限公司 | Aluminum plate electrostatic spraying process |
| CN109022840A (en) * | 2018-07-17 | 2018-12-18 | 北京科技大学 | A kind of secondary aluminium alloy microstructures Control method |
| CN109396003B (en) * | 2018-10-31 | 2021-10-12 | 龙图节能铝材（宣城）有限公司 | Aluminum profile production process |
| CN111975293A (en) * | 2020-07-25 | 2020-11-24 | 上海爱焙乐铝箔包装有限公司 | Environment-friendly energy-saving high-temperature-resistant aluminum foil and preparation process thereof |
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| CH572268A5 (en) * | 1973-02-16 | 1976-01-30 | Alusuisse | |
| US4010046A (en) * | 1976-03-04 | 1977-03-01 | Swiss Aluminium Ltd. | Method of extruding aluminum base alloys |
| SI20122A (en) * | 1998-12-22 | 2000-06-30 | Impol, Industrija Metalnih Polizdelkov, D.D. | Aluminium casting-automate alloy, process for its production and application |
| CN1900336A (en) * | 2006-07-27 | 2007-01-24 | 中山市金胜铝业有限公司 | Aluminum alloy pipe for high purity and high precision light sensitive drum base material and producing method |
| CN101717870B (en) * | 2009-12-28 | 2011-04-13 | 东北轻合金有限责任公司 | Method for manufacturing aluminum alloy bar for rail wagon body rivets |
| CN101935784B (en) * | 2010-08-30 | 2011-11-23 | 佛山市鸿金源铝业制品有限公司 | Aluminium material for contact nets on rapid transit railway and manufacturing method thereof |
| CN102337435B (en) * | 2011-10-31 | 2013-03-27 | 哈尔滨中飞新技术股份有限公司 | Aluminum alloy pipe and manufacture method thereof |
| CN102489973B (en) * | 2011-12-23 | 2013-08-28 | 东北轻合金有限责任公司 | Method for manufacturing aluminum alloy hollow section for sedan bumper |
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