CN103710591A - Preparation method for aluminum alloy profile with excellent welding performance - Google Patents
Preparation method for aluminum alloy profile with excellent welding performance Download PDFInfo
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Abstract
The invention discloses a preparation method for an aluminum alloy profile with excellent welding performance. The aluminum alloy profile consists of the elements in percentage by mass: 3.5-4.5 percent of Mg, 1.2-2.6 percent of Mn, 0.5-1.0 percent of Cr, 0.2-0.4 percent of Si, 0.1-0.3 percent of Fe, 0.15-0.25 percent of Cu, 0.1-0.2 percent of Zn, 0.2-0.3 percent of Ti, 0.1-0.2 percent of V, 0.05-0.15 percent of Zr, 0.04-0.08 percent of B, 0.02-0.05 percent of Ta, 0.01-0.03 percent of Be, 0.015-0.025 percent of Ce, 0.005-0.01 percent of Ho and the balance of Al. The aluminum alloy prepared by the preparation method disclosed by the invention is excellent in welding performance, high in mechanical property and low in thermal expansion coefficient; a welding joint has the advantages of high intensity, high stress corrosion resistance, high forgeability and the like; when the welding joint is used for a welding structure, the phenomena of formation of air holes, thermal cracks and the like are avoided.
Description
Technical field
The present invention relates to a kind of preparation method of aluminium alloy extrusions of welding property excellence, belong to aluminum alloy materials processing technique field.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, because of its density low, strength ratio is higher, approach or surpass high-quality steel, plasticity is good, there is the performances such as good electroconductibility, thermal conductivity, corrosion stability, can be processed into various section bars, be widely used in the welded construction of Industrial products.Along with the development of science and technology, the welding property of aluminium alloy extrusions, the performance such as the mechanical property of welding joint, splitting resistance and anti-stress corrosiveness, more and more can not meet welded performance requriements, easily produces the phenomenons such as pore, thermal crack.
Summary of the invention
The object of the present invention is to provide the preparation method of the aluminium alloy extrusions that a kind of welding property is excellent, intensity is high, anti-stress corrosiveness is good.
For achieving the above object, the present invention adopts following technical scheme:
A preparation method for the aluminium alloy extrusions of welding property excellence, comprises the following steps:
(1) according to element mass percent, meet following requirement: Mg 3.5-4.5, Mn 1.2-2.6, Cr 0.5-1.0, Si0.2-0.4, Fe 0.1-0.3, Cu 0.15-0.25, Zn 0.1-0.2, Ti 0.2-0.3, V 0.1-0.2, Zr0.05-0.15, B 0.04-0.08, Ta 0.02-0.05, Be 0.01-0.03, Ce 0.015-0.025, Ho 0.005-0.01, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 745-765 ℃, carry out melting, add and treat that furnace charge all melts, stir 20-30min, detect alloying constituent and adjust; Then add refining agent to carry out refining, refining temperature is 730-750 ℃, and refining time is 15-25min, standing 20-30min after skimming, then adjust temperature to 715-735 ℃, logical 70%N in aluminium liquid
2+ 20%Ar+10Cl
2diversity gas refinery by de-gassing 15-25min, gaseous tension is 0.15-0.20atm, gas flow is 1.5-2.0 m
3/ min, standing 20-30min, fully floats oxidation sludge, starts casting after skimming;
(2) adopt metal mold water-cooled semicontinuous casting technology, aluminium liquid tapping temperature is 710-730 ℃, and casting temp is 680-700 ℃, casting speed is 100-120 mm/min, cooling water pressure is 0.2-0.4MPa, and cooling water intake temperature is not higher than 25 ℃, and water outlet water temperature is not higher than 45 ℃;
(3) strand is carried out to homogenizing processing: first with 100-150 ℃/h, be warming up to 220-260 ℃, insulation 2-4h, with 70-90 ℃/h, be warming up to 420-450 ℃ again, insulation 3-6h, then with 80-120 ℃/h, be cooled to 180-220 ℃, insulation 2-3h, putting into 0-5 ℃ of icy salt solution is cooled to below 50 ℃, then take out section bar and be warming up to 320-360 ℃ with 140-180 ℃/h, insulation 3-5h, then be cooled to 485-505 ℃ with 60-80 ℃/h, insulation 5-10h, then with 120-160 ℃/h, be cooled to 170-190 ℃, insulation 1-2h, air cooling is to room temperature;
(4) ingot casting after homogenizing processing is heated to 450-480 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 420-460 ℃, container preheating temperature 415-435 ℃, and extruding rate is 16-22m/min;
(5) the above-mentioned aluminium alloy extrusions squeezing out adopts online air-cooled or water smoke Cooling Quenching, after press quenching, carry out ageing treatment: first with 40-50 ℃/h, be warming up to 80-90 ℃, insulation 10-15h, air cooling is warming up to 170-190 ℃ with 85-95 ℃/h to room temperature, insulation 8-12h, with 50-60 ℃/h, be cooled to 75-85 ℃ again, insulation 12-16h, air cooling is warming up to 185-205 ℃ with 90-110 ℃/h to room temperature, insulation 5-10h, with 50-60 ℃/h, be cooled to 85-95 ℃ again, insulation 10-15h, air cooling is to room temperature, through surface treatment, finishing, inspect for acceptance, packing gets product.
Described refining agent preparation method is as follows: a. takes the raw material of following weight part: magnesium chloride 10-15, Repone K 15-20, blast-furnace slag 4-8, volcanic ash 5-10, fluorite 3-6, bitter water chestnut soil 4-8, useless brick powder 3-6, Graphite Powder 99 2-5, rhombspar 8-12, manganese sulfide 2-3, nano aluminium oxide 2-3, vinyltriethoxysilane 0.5-1, trolamine 1-2; B. fluorite, bitter water chestnut soil, rhombspar are mixed, 730-760 ℃ of calcining 2-3h, being cooled to and putting into concentration after room temperature is that the hydrochloric acid soln of 15-20% soaks 1-2h, takes out and is washed with distilled water to neutrality, dry, 1200-1250 ℃ of calcining 1-2h, is cooled to room temperature, pulverizes, crossing 100-150 mesh sieve mixes with blast-furnace slag, volcanic ash, useless brick powder, Graphite Powder 99, then add vinyltriethoxysilane and trolamine, 2000-3000rpm speed lapping 10-15min, stand-by; C. magnesium chloride and Repone K are mixed, be heated to 780-810 ℃, after its whole meltings, the powder that adds all the other raw materials and step b to make, stirs 20-30min, and air prilling, obtains refining agent.
Beneficial effect of the present invention:
The present invention is by adding the elements such as micro-Ti, Zr, B, V, not only can crystal grain thinning and improve plasticity, toughness, and can significantly improve cracking resistance energy.The aluminium alloy capability welding property that the present invention makes is excellent, good mechanical performance, and thermal expansivity is low, and welding joint has the advantages such as intensity is high, anti-stress corrosiveness good, and forging property is good, for welded construction, is difficult for producing the phenomenons such as pore, thermal crack.
Embodiment
A preparation method for the aluminium alloy extrusions of welding property excellence, comprises the following steps:
(1) according to element mass percent, meet following requirement: Mg 3.5-4.5, Mn 1.2-2.6, Cr 0.5-1.0, Si0.2-0.4, Fe 0.1-0.3, Cu 0.15-0.25, Zn 0.1-0.2, Ti 0.2-0.3, V 0.1-0.2, Zr0.05-0.15, B 0.04-0.08, Ta 0.02-0.05, Be 0.01-0.03, Ce 0.015-0.025, Ho 0.005-0.01, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 750 ℃, carry out melting, add and treat that furnace charge all melts, stir 30min, detect alloying constituent and adjust; Then add refining agent to carry out refining, refining temperature is 735 ℃, and refining time is 25min, standing 30min after skimming, then adjust temperature to 720 ℃, logical 70%N in aluminium liquid
2+ 20%Ar+10Cl
2diversity gas refinery by de-gassing 20min, gaseous tension is 0.18atm, gas flow is 1.6 m
3/ min, standing 30min, fully floats oxidation sludge, starts casting after skimming;
(2) adopt metal mold water-cooled semicontinuous casting technology, aluminium liquid tapping temperature is 710 ℃, and casting temp is 690 ℃, and casting speed is 110 mm/min, and cooling water pressure is 0.3MPa, and cooling water intake temperature is not higher than 25 ℃, and water outlet water temperature is not higher than 45 ℃;
(3) strand is carried out to homogenizing processing: first with 120 ℃/h, be warming up to 250 ℃, insulation 3h, then be warming up to 430 ℃ with 80 ℃/h, insulation 5h, is then cooled to 220 ℃ with 100 ℃/h, insulation 2h, putting into 2 ℃ of icy salt solutions is cooled to below 50 ℃, then take out section bar and be warming up to 340 ℃ with 160 ℃/h, insulation 4h, then be cooled to 495 ℃ with 70 ℃/h, insulation 8h, then with 140 ℃/h, be cooled to 180 ℃, insulation 1h, air cooling is to room temperature;
(4) ingot casting after homogenizing processing is heated to 460 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 430 ℃, 420 ℃ of container preheating temperatures, and extruding rate is 20m/min;
(5) the above-mentioned aluminium alloy extrusions squeezing out adopts online air-cooled or water smoke Cooling Quenching, after press quenching, carry out ageing treatment: first with 45 ℃/h, be warming up to 90 ℃, insulation 10h, air cooling is warming up to 185 ℃ with 90 ℃/h to room temperature, insulation 10h, with 55 ℃/h, be cooled to 80 ℃ again, insulation 14h, air cooling is warming up to 205 ℃ with 105 ℃/h to room temperature, insulation 7h, then with 60 ℃/h, be cooled to 95 ℃, insulation 10h, air cooling is to room temperature, through surface treatment, finishing, inspect for acceptance, pack and get product.
Described refining agent preparation method is as follows: a. takes the raw material of following weight (kg): magnesium chloride 12, Repone K 18, blast-furnace slag 6, volcanic ash 7, fluorite 5, bitter water chestnut soil 8, useless brick powder 4, Graphite Powder 99 3, rhombspar 8, manganese sulfide 3, nano aluminium oxide 3, vinyltriethoxysilane 0.6, trolamine 1; B. fluorite, bitter water chestnut soil, rhombspar are mixed, 760 ℃ of calcining 2h, being cooled to and putting into concentration after room temperature is that 20% hydrochloric acid soln soaks 1h, takes out and is washed with distilled water to neutrality, dry, 1200 ℃ of calcining 2h, are cooled to room temperature, pulverize, crossing 150 mesh sieves mixes with blast-furnace slag, volcanic ash, useless brick powder, Graphite Powder 99, then add vinyltriethoxysilane and trolamine, 2000rpm speed lapping 15min, stand-by; C. magnesium chloride and Repone K are mixed, be heated to 810 ℃, after its whole meltings, the powder that adds all the other raw materials and step b to make, stirs 20min, and air prilling, obtains refining agent.
The aluminium alloy extrusions of gained through check mechanical property is: tensile strength 356Mpa, and yield strength is 248Mpa, elongation is 15.6%.
Claims (2)
1. a preparation method for the aluminium alloy extrusions of welding property excellence, is characterized in that comprising the following steps:
(1) according to element mass percent, meet following requirement: Mg 3.5-4.5, Mn 1.2-2.6, Cr 0.5-1.0, Si0.2-0.4, Fe 0.1-0.3, Cu 0.15-0.25, Zn 0.1-0.2, Ti 0.2-0.3, V 0.1-0.2, Zr0.05-0.15, B 0.04-0.08, Ta 0.02-0.05, Be 0.01-0.03, Ce 0.015-0.025, Ho 0.005-0.01, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 745-765 ℃, carry out melting, add and treat that furnace charge all melts, stir 20-30min, detect alloying constituent and adjust; Then add refining agent to carry out refining, refining temperature is 730-750 ℃, and refining time is 15-25min, standing 20-30min after skimming, then adjust temperature to 715-735 ℃, logical 70%N in aluminium liquid
2+ 20%Ar+10Cl
2diversity gas refinery by de-gassing 15-25min, gaseous tension is 0.15-0.20atm, gas flow is 1.5-2.0 m
3/ min, standing 20-30min, fully floats oxidation sludge, starts casting after skimming;
(2) adopt metal mold water-cooled semicontinuous casting technology, aluminium liquid tapping temperature is 710-730 ℃, and casting temp is 680-700 ℃, casting speed is 100-120 mm/min, cooling water pressure is 0.2-0.4MPa, and cooling water intake temperature is not higher than 25 ℃, and water outlet water temperature is not higher than 45 ℃;
(3) strand is carried out to homogenizing processing: first with 100-150 ℃/h, be warming up to 220-260 ℃, insulation 2-4h, with 70-90 ℃/h, be warming up to 420-450 ℃ again, insulation 3-6h, then with 80-120 ℃/h, be cooled to 180-220 ℃, insulation 2-3h, putting into 0-5 ℃ of icy salt solution is cooled to below 50 ℃, then take out section bar and be warming up to 320-360 ℃ with 140-180 ℃/h, insulation 3-5h, then be cooled to 485-505 ℃ with 60-80 ℃/h, insulation 5-10h, then with 120-160 ℃/h, be cooled to 170-190 ℃, insulation 1-2h, air cooling is to room temperature;
(4) ingot casting after homogenizing processing is heated to 450-480 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 420-460 ℃, container preheating temperature 415-435 ℃, and extruding rate is 16-22m/min;
(5) the above-mentioned aluminium alloy extrusions squeezing out adopts online air-cooled or water smoke Cooling Quenching, after press quenching, carry out ageing treatment: first with 40-50 ℃/h, be warming up to 80-90 ℃, insulation 10-15h, air cooling is warming up to 170-190 ℃ with 85-95 ℃/h to room temperature, insulation 8-12h, with 50-60 ℃/h, be cooled to 75-85 ℃ again, insulation 12-16h, air cooling is warming up to 185-205 ℃ with 90-110 ℃/h to room temperature, insulation 5-10h, with 50-60 ℃/h, be cooled to 85-95 ℃ again, insulation 10-15h, air cooling is to room temperature, through surface treatment, finishing, inspect for acceptance, packing gets product.
2. the preparation method of the aluminium alloy extrusions of welding property excellence according to claim 1, it is characterized in that, described refining agent preparation method is as follows: a. takes the raw material of following weight part: magnesium chloride 10-15, Repone K 15-20, blast-furnace slag 4-8, volcanic ash 5-10, fluorite 3-6, bitter water chestnut soil 4-8, useless brick powder 3-6, Graphite Powder 99 2-5, rhombspar 8-12, manganese sulfide 2-3, nano aluminium oxide 2-3, vinyltriethoxysilane 0.5-1, trolamine 1-2; B. fluorite, bitter water chestnut soil, rhombspar are mixed, 730-760 ℃ of calcining 2-3h, being cooled to and putting into concentration after room temperature is that the hydrochloric acid soln of 15-20% soaks 1-2h, takes out and is washed with distilled water to neutrality, dry, 1200-1250 ℃ of calcining 1-2h, is cooled to room temperature, pulverizes, crossing 100-150 mesh sieve mixes with blast-furnace slag, volcanic ash, useless brick powder, Graphite Powder 99, then add vinyltriethoxysilane and trolamine, 2000-3000rpm speed lapping 10-15min, stand-by; C. magnesium chloride and Repone K are mixed, be heated to 780-810 ℃, after its whole meltings, the powder that adds all the other raw materials and step b to make, stirs 20-30min, and air prilling, obtains refining agent.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404313A (en) * | 2014-11-25 | 2015-03-11 | 安徽天祥空调科技有限公司 | Aluminum alloy slice easy to weld for air conditioner radiator and preparation method of aluminum alloy slice |
| CN105695820A (en) * | 2016-04-27 | 2016-06-22 | 芜湖真空科技有限公司 | Aluminum alloy for high-tenacity coating equipment and preparation method thereof |
| CN105734355A (en) * | 2016-04-27 | 2016-07-06 | 芜湖真空科技有限公司 | Novel aluminum alloy for coating equipment and preparation method of novel aluminum alloy |
| CN105838941A (en) * | 2016-04-27 | 2016-08-10 | 芜湖真空科技有限公司 | Novel aluminum alloy used for coating equipment and preparation method thereof |
| CN105886845A (en) * | 2016-04-27 | 2016-08-24 | 芜湖真空科技有限公司 | High-elongation-rate aluminum alloy for film plating equipment and production method of high-elongation-rate aluminum alloy |
| CN107739923A (en) * | 2017-11-08 | 2018-02-27 | 宁波市海曙兴达铝业有限公司 | Al Mg Si aluminium alloys and preparation method thereof |
| CN109457148A (en) * | 2018-12-25 | 2019-03-12 | 惠州市田宇中南铝合金新材料科技有限公司 | A kind of Al-Mg-Mn-Cu alloy and preparation method thereof |
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| CN111659882A (en) * | 2020-06-30 | 2020-09-15 | 同济大学 | Aluminum magnesium alloy powder for 3D printing and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404313A (en) * | 2014-11-25 | 2015-03-11 | 安徽天祥空调科技有限公司 | Aluminum alloy slice easy to weld for air conditioner radiator and preparation method of aluminum alloy slice |
| CN105695820A (en) * | 2016-04-27 | 2016-06-22 | 芜湖真空科技有限公司 | Aluminum alloy for high-tenacity coating equipment and preparation method thereof |
| CN105734355A (en) * | 2016-04-27 | 2016-07-06 | 芜湖真空科技有限公司 | Novel aluminum alloy for coating equipment and preparation method of novel aluminum alloy |
| CN105838941A (en) * | 2016-04-27 | 2016-08-10 | 芜湖真空科技有限公司 | Novel aluminum alloy used for coating equipment and preparation method thereof |
| CN105886845A (en) * | 2016-04-27 | 2016-08-24 | 芜湖真空科技有限公司 | High-elongation-rate aluminum alloy for film plating equipment and production method of high-elongation-rate aluminum alloy |
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| CN109457148A (en) * | 2018-12-25 | 2019-03-12 | 惠州市田宇中南铝合金新材料科技有限公司 | A kind of Al-Mg-Mn-Cu alloy and preparation method thereof |
| CN110055445A (en) * | 2019-05-17 | 2019-07-26 | 亚太轻合金(南通)科技有限公司 | A kind of high-strength aluminum alloy and preparation method thereof |
| CN111659882A (en) * | 2020-06-30 | 2020-09-15 | 同济大学 | Aluminum magnesium alloy powder for 3D printing and preparation method thereof |
| CN114196858A (en) * | 2021-12-13 | 2022-03-18 | 河北唐兴合金科技有限公司 | Light aluminum alloy hub with high yield strength and forging process thereof |
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Application publication date: 20140409 |