CN103993191B - A kind of preparation method of high-strength/tenacity aluminum alloy section bar - Google Patents
A kind of preparation method of high-strength/tenacity aluminum alloy section bar Download PDFInfo
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- CN103993191B CN103993191B CN201410091632.3A CN201410091632A CN103993191B CN 103993191 B CN103993191 B CN 103993191B CN 201410091632 A CN201410091632 A CN 201410091632A CN 103993191 B CN103993191 B CN 103993191B
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Abstract
The invention discloses the preparation method of a kind of high-strength/tenacity aluminum alloy section bar, this aluminium alloy extrusions is made up of the element of following mass percent: Cu 3.6 4.2, Mg 1.5 2.0, Mn 0.8 1.2, Fe 0.1 0.15, Si 0.1 0.3, Zn 0.15 0.25, Ti 0.05 0.15, Cr 0.05 0.1, Sb 0.04 0.08, Zr 0.1 0.2, Bi 0.05 0.15, Pd 0.03 0.06, B 0.005 0.008, Sc 0.04 0.06, Nd 0.03 0.05, Ho 0.02 0.03, and surplus is Al.Aluminium alloy extrusions comprehensive mechanical property of the present invention is excellent, not only has the highest tensile strength, the most also has higher percentage elongation, tensile strength >=550MPa, percentage elongation >=12%, have a extensive future.
Description
Technical field
The present invention relates to the preparation method of a kind of high-strength/tenacity aluminum alloy section bar, belong to aluminum alloy materials process technology
Field.
Background technology
Aluminium alloy extrusions is a most widely used class non-ferrous metal structural material in industry, because its density is low, than
Intensity is high, good springiness, and shock resistance is good, corrosion-resistant, high connductivity, high heat conduction, and easy surface colours, easily
Processing, the good characteristic such as recyclable regeneration, be widely used in Aeronautics and Astronautics, automobile, machine-building, boats and ships,
The fields such as building, finishing and chemical industry.Along with science and technology and the developing rapidly of industrial economy in recent years,
To aluminium alloy extrusions from require nothing more than intensity to emphasizing intensity, the combination property direction of toughness is developed.In the market
Aluminium alloy extrusions of a great variety, have presents high intensity, or high fracture toughness, but can not be simultaneously
Reach the combination property of high-intensity high-tenacity.Therefore, it is badly in need of developing a kind of aluminium with high-intensity high-tenacity
Alloy profile.
Summary of the invention
Present invention aims to prior art not enough, it is provided that the preparation of a kind of high-strength/tenacity aluminum alloy section bar
Method.This aluminium alloy extrusions excellent combination property, not only has the highest tensile strength, the most also has higher
Percentage elongation.
For achieving the above object, the technical solution used in the present invention is as follows:
The preparation method of a kind of high-strength/tenacity aluminum alloy section bar, comprises the following steps:
(1) aluminium ingot, copper ingot, magnesium ingot, aluminium scrap are put into smelting furnace and carry out melting, smelting temperature 735-765 DEG C,
Until its melting down more than 80% time, put into the intermediate alloy such as Al-Zr, Al-Mn, after its all fusing, adjust
Temperature, to 740-770 DEG C, adds the carbon trichloride of melt weight 0.2-0.3% and the calcirm-fluoride essence of 0.1-0.2%
Refining 15-20min, electromagnetic agitation 10-15min after refining, stand 20-30min, then adjust temperature extremely
750-780 DEG C, add Al-Ti-B-C intermediate alloy, be incubated 5-10min, skim, sample analysis, strictly
The percentage by weight of each elemental composition controlling aluminium alloy solution meets the following requirements: Cu 3.6-4.2, Mg
1.5-2.0、Mn 0.8-1.2、Fe 0.1-0.15、Si 0.1-0.3、Zn 0.15-0.25、Ti 0.05-0.15、
Cr 0.05-0.1、Sb 0.04-0.08、Zr 0.1-0.2、Bi 0.05-0.15、Pd 0.03-0.06、B
0.005-0.008, Sc 0.04-0.06, Nd 0.03-0.05, Ho 0.02-0.03, surplus is Al；
(2) using semicontinuous direct water-cooling casting method to cast, casting temperature is 720-740 DEG C, casting
Making speed 65-85mm/min, cooling water pressure 0.2-0.3MPa, cooling water flow is 1750-1950L/min；
(3) aluminium alloy cast ingot is carried out Homogenization Treatments: be first warming up to 420-460 DEG C with 180-240 DEG C/h,
Insulation 3-6h, strong wind cooling, to 200-250 DEG C, is incubated 2-3h, is then warming up to 100-150 DEG C/h
460-500 DEG C, it is incubated 5-10h, then is cooled to 260-320 DEG C with 80-120 DEG C/h, be incubated 3-4h, then
Water smoke is cooled to 160-190 DEG C, is incubated 1-2h, then is warming up to 440-480 DEG C with 120-160 DEG C/h, insulation
4-6h, is then cooled to 180-220 DEG C with 100-150 DEG C/h, is incubated 1-2h, and air cooling is to room temperature；
(4) ingot casting after above-mentioned Homogenization Treatments is heated to 470-490 DEG C, is then placed in being preheated to
Using extruder extruded in the mould of 485-505 DEG C, extruding rate is 14-18m/min, and mold clearing temperature is
510-530℃；
(5) by above-mentioned air-cooled to 150-200 DEG C extruded of aluminium alloy extrusions high wind, then with 80-120 DEG C
/ h is warming up to 330-360 DEG C, is incubated 3-5h, then is warming up to 490-500 DEG C with 50-100 DEG C/h, is incubated 1-2h,
Then it is cooled to 240-280 DEG C with 100-150 DEG C/h, is incubated 4-6h, be then placed in 0-5 DEG C of brine ice cooling
To less than 50 DEG C；
(6) aluminium alloy extrusions is carried out Ageing Treatment: be first warming up to 80-90 DEG C with 40-50 DEG C/h, insulation
10-15h, air cooling, to room temperature, is then warming up to 60-70 DEG C with 30-40 DEG C/h, is incubated 14-18h, then with 50-60 DEG C
/ h is warming up to 165-185 DEG C, is incubated 8-12h, then is cooled to 75-85 DEG C with 45-55 DEG C/h, is incubated 12-16h,
Air cooling, to room temperature, is then warming up to 100-120 DEG C with 50-60 DEG C/h, is incubated 10-15h, and air cooling is to room temperature, so
After be warming up to 170-190 DEG C with 85-95 DEG C/h, be incubated 5-10h, then be cooled to 70-80 DEG C with 40-50 DEG C/h,
Insulation 12-16h, air cooling is to room temperature.
Beneficial effects of the present invention:
The present invention, by optimizing the content of Cu, Mg, Mn element, adds Sc, Nd, Ho rare earth unit of trace
Element, with crystal grain thinning, improves the tissue of as-cast aluminum alloy, reaches to put forward heavy alloyed intensity and toughness simultaneously.This
Invention additionally uses level Four Ageing Treatment, and thick, the interrupted Grain Boundary Precipitates pattern that can be formed significantly changes
The heterogeneous microstructure of kind aluminium alloy and the mechanical property of raising aluminium alloy.The comprehensive mechanics of aluminium alloy extrusions of the present invention
Excellent performance, not only has the highest tensile strength, the most also has a higher percentage elongation, and tensile strength >=
550MPa, percentage elongation >=12%, have a extensive future.
Detailed description of the invention
The preparation method of a kind of high-strength/tenacity aluminum alloy section bar, comprises the following steps:
(1) aluminium ingot, copper ingot, magnesium ingot, aluminium scrap are put into smelting furnace and carry out melting, smelting temperature 750 DEG C,
Until its melting down more than 80% time, put into the intermediate alloy such as Al-Zr, Al-Mn, after its all fusing, adjust
Temperature, to 765 DEG C, adds the carbon trichloride of melt weight 0.25% and the calcirm-fluoride refining 18min of 0.15%, essence
Electromagnetic agitation 12min after refining, stands 25min, and then adjustment temperature is to 770 DEG C, adds in Al-Ti-B-C
Between alloy, be incubated 7min, skim, sample analysis, the weight of the strict each elemental composition controlling aluminium alloy solution
Amount percentage meet the following requirements: Cu 3.6-4.2, Mg 1.5-2.0, Mn 0.8-1.2, Fe 0.1-0.15,
Si 0.1-0.3、Zn 0.15-0.25、Ti 0.05-0.15、Cr 0.05-0.1、Sb 0.04-0.08、Zr
0.1-0.2、Bi 0.05-0.15、Pd 0.03-0.06、B 0.005-0.008、Sc 0.04-0.06、Nd
0.03-0.05, Ho 0.02-0.03, surplus is Al；
(2) using semicontinuous direct water-cooling casting method to cast, casting temperature is 730 DEG C, casting speed
Degree 75mm/min, cooling water pressure 0.3MPa, cooling water flow is 1800L/min；
(3) aluminium alloy cast ingot is carried out Homogenization Treatments: be first warming up to 440 DEG C with 220 DEG C/h, is incubated 4h,
Strong wind cooling, to 220 DEG C, is incubated 2h, is then warming up to 480 DEG C with 120 DEG C/h, is incubated 8h, then with 100 DEG C
/ h is cooled to 280 DEG C, is incubated 3h, and then water smoke is cooled to 170 DEG C, is incubated 1h, then with 140 DEG C/h liter
Temperature, to 460 DEG C, is incubated 5h, is then cooled to 220 DEG C with 120 DEG C/h, is incubated 2h, and air cooling is to room temperature；
(4) ingot casting after above-mentioned Homogenization Treatments is heated to 485 DEG C, is then placed in being preheated to the mould of 495 DEG C
Using extruder extruded in tool, extruding rate is 16m/min, and mold clearing temperature is 520 DEG C；
(5) by air-cooled to 180 DEG C of above-mentioned extruded aluminium alloy extrusions high wind, then heat up with 100 DEG C/h
To 350 DEG C, it is incubated 4h, then is warming up to 495 DEG C with 80 DEG C/h, be incubated 1h, be then cooled to 260 DEG C with 120 DEG C/h,
Insulation 5h, is then placed in 1 DEG C of brine ice being cooled to less than 50 DEG C；
(6) aluminium alloy extrusions is carried out Ageing Treatment: be first warming up to 90 DEG C with 45 DEG C/h, be incubated 10h, air cooling
To room temperature, then it is warming up to 70 DEG C with 35 DEG C/h, is incubated 16h, then is warming up to 170 DEG C with 50 DEG C/h, be incubated 10h,
Being cooled to 80 DEG C with 45 DEG C/h again, be incubated 14h, air cooling, to room temperature, is then warming up to 110 DEG C with 60 DEG C/h, protects
Temperature 12h, air cooling, to room temperature, is then warming up to 185 DEG C with 90 DEG C/h, is incubated 8h, then is cooled to 80 DEG C with 50 DEG C/h,
Insulation 12h, air cooling is to room temperature.
Through inspection, above-mentioned prepared aluminium alloy extrusions chemical composition is: Cu 3.94%, Mg 1.86%, Mn 1.08%,
Fe 0.12%, Si 0.24%, Zn 0.19%, Ti 0.094%, Cr 0.077%, Sb 0.065%, Zr 0.17%,
Bi 0.086%, Pd 0.045%, B 0.0073%, Sc 0.056%, Nd 0.044%, Ho 0.027%, surplus
For Al；Mechanical property is: tensile strength 591MPa, yield strength 475MPa, percentage elongation 15.7%.
Claims (1)
1. the preparation method of a high-strength/tenacity aluminum alloy section bar, it is characterised in that comprise the following steps:
null(1) by aluminium ingot、Copper ingot、Magnesium ingot、Aluminium scrap puts into smelting furnace and carries out melting，Smelting temperature 735-765 DEG C，Until its melting down more than 80% time，Put into Al-Zr、Al-Mn intermediate alloy，After its all fusing，Adjust temperature to 740-770 DEG C，Add the carbon trichloride of melt weight 0.2-0.3% and the calcirm-fluoride refining 15-20min of 0.1-0.2%，Electromagnetic agitation 10-15min after refining，Stand 20-30min，Then temperature is adjusted to 750-780 DEG C，Add Al-Ti-B-C intermediate alloy，Insulation 5-10min，Skim，Sample analysis，The percentage by weight of the strict each elemental composition controlling aluminium alloy solution meets the following requirements: Cu 3.6-4.2、Mg 1.5-2.0、Mn 0.8-1.2、Fe 0.1-0.15、Si 0.1-0.3、Zn 0.15-0.25、Ti 0.05-0.15、Cr 0.05-0.1、Sb 0.04-0.08、Zr 0.1-0.2、Bi 0.05-0.15、Pd 0.03-0.06、B 0.005-0.008、Sc 0.04-0.06、Nd 0.03-0.05、Ho 0.02-0.03，Surplus is Al；
(2) using semicontinuous direct water-cooling casting method to cast, casting temperature is 720-740 DEG C, casting speed 65-85mm/min, cooling water pressure 0.2-0.3MPa, and cooling water flow is 1750-1950 L/min；
(3) aluminium alloy cast ingot is carried out Homogenization Treatments: be first warming up to 420-460 DEG C with 180-240 DEG C/h, insulation 3-6h, strong wind cooling is to 200-250 DEG C, insulation 2-3h, then it is warming up to 460-500 DEG C with 100-150 DEG C/h, insulation 5-10h, being cooled to 260-320 DEG C with 80-120 DEG C/h again, be incubated 3-4h, then water smoke is cooled to 160-190 DEG C, insulation 1-2h, it is warming up to 440-480 DEG C with 120-160 DEG C/h again, is incubated 4-6h, is then cooled to 180-220 DEG C with 100-150 DEG C/h, insulation 1-2h, air cooling is to room temperature；
(4) ingot casting after above-mentioned Homogenization Treatments being heated to 470-490 DEG C, be then placed in being preheated in the mould of 485-505 DEG C use extruder extruded, extruding rate is 14-18m/min, and mold clearing temperature is 510-530 DEG C；
(5) by air-cooled to 150-200 DEG C for above-mentioned extruded aluminium alloy extrusions high wind, then it is warming up to 330-360 DEG C with 80-120 DEG C/h, insulation 3-5h, it is warming up to 490-500 DEG C again with 50-100 DEG C/h, insulation 1-2h, then it is cooled to 240-280 DEG C with 100-150 DEG C/h, is incubated 4-6h, is then placed in 0-5 DEG C of salt solution being cooled to less than 50 DEG C；
(6) aluminium alloy extrusions is carried out Ageing Treatment: be first warming up to 80-90 DEG C with 40-50 DEG C/h, insulation 10-15h, air cooling is to room temperature, then it is warming up to 60-70 DEG C with 30-40 DEG C/h, insulation 14-18h, it is warming up to 165-185 DEG C again with 50-60 DEG C/h, insulation 8-12h, it is cooled to 75-85 DEG C again with 45-55 DEG C/h, insulation 12-16h, air cooling is to room temperature, then it is warming up to 100-120 DEG C with 50-60 DEG C/h, insulation 10-15h, air cooling is to room temperature, then it is warming up to 170-190 DEG C with 85-95 DEG C/h, insulation 5-10h, it is cooled to 70-80 DEG C again with 40-50 DEG C/h, insulation 12-16h, air cooling is to room temperature.
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| CN104726753A (en) * | 2015-03-23 | 2015-06-24 | 苏州市神龙门窗有限公司 | Preparation method of aluminum alloy section for doors/windows |
| CN105200282A (en) * | 2015-10-30 | 2015-12-30 | 苏州天兼新材料科技有限公司 | Novel Mg-Al-TiB2-rare earth element intermediate alloy and preparation method thereof |
| CN106321779A (en) * | 2016-08-26 | 2017-01-11 | 宁波市鄞州唯达汽车配件厂（普通合伙） | Gear case of cutting machine |
| CN106623533A (en) * | 2016-11-17 | 2017-05-10 | 淮北津奥铝业有限公司 | Method for bending L-shaped aluminum beam |
| CN107326223A (en) * | 2017-06-09 | 2017-11-07 | 太仓东旭精密机械有限公司 | A kind of bicycle use alloy material |
| CN112813378A (en) * | 2020-12-30 | 2021-05-18 | 安徽鑫铂铝业股份有限公司 | Preparation method of high-toughness solar photovoltaic aluminum profile |
| CN112676371A (en) * | 2021-01-07 | 2021-04-20 | 安徽鑫发铝业有限公司 | Preparation method of high-strength and high-toughness ultrathin hollow high-speed rail aluminum profile |
| CN112981196B (en) * | 2021-02-10 | 2022-04-22 | 北京科技大学 | Ultrahigh-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy and preparation method thereof |
| CN114107757B (en) * | 2022-01-24 | 2022-04-08 | 江苏瑞振压铸有限公司 | Cast aluminum alloy for automobile metal casting and processing technology thereof |
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Denomination of invention: A preparation method of high strength and high toughness aluminum alloy profile Effective date of registration: 20201228 Granted publication date: 20160907 Pledgee: Huishang Bank Co.,Ltd. Huaibei Xiangyang sub branch Pledgor: HUAIBEI JINAO ALUMINUM Co.,Ltd. Registration number: Y2020980010178 |