CN103725939A - Preparation method of aluminium alloy section for hot roller of duplicator - Google Patents
Preparation method of aluminium alloy section for hot roller of duplicator Download PDFInfo
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- CN103725939A CN103725939A CN201310688458.6A CN201310688458A CN103725939A CN 103725939 A CN103725939 A CN 103725939A CN 201310688458 A CN201310688458 A CN 201310688458A CN 103725939 A CN103725939 A CN 103725939A
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Abstract
The invention discloses a preparation method of an aluminium alloy section for a hot roller of a duplicator. The aluminium alloy section comprises the following elements by mass percent: 0.2-0.5 percent of Si, 2.8-3.6 percent of Mg, 0.6-1.2 percent of Mn, 0.3-0.6 percent of Cu, 0.2-0.4 percent of Fe, 0.25-0.35 percent of Cr, 0.2-0.3 percent of Co, 0.1-0.2 percent of Zn, 0.05-0.15 percent of Ti, 0.04-0.12 percent of Be, 0.03-0.06 percent of Pb, 0.02-0.03 percent of La, 0.01-0.02 percent of Pr, and the balance of Al. Through the increase of the content of the elements such as Mg and Mn and the microalloying effects of a small amount of La and Pr rare earth elements, the structure of the alloy is improved, the crystalline grain is refined, and the high temperature stability of the alloy is improved, so that the aluminium alloy section has excellent mechanical strength, high-temperature creep resistance and thermal resistance, and completely meets the use requirement for the hot roller of the duplicator.
Description
Technical field
The preparation method who the present invention relates to a kind of duplicating machine hot-rolling aluminium alloy extrusions, belongs 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 exceed 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 aspects such as machinofacture, Transport Machinery, power machine and aircraft industry.
Because duplicating machine hot-rolling requires lightweight, non magnetic and will have heat conductivity and thermotolerance etc., so aluminium alloy material is manufactured.But the high temperature creep of existing aluminum alloy materials is poor, at high temperature Reusability can cause distortion, thus the use properties of impression duplicating machine.
in invention
The object of the present invention is to provide all preparation methods of excellent duplicating machine hot-rolling aluminium alloy extrusions of a kind of mechanical property, high temperature creep, thermotolerance.
For achieving the above object, the present invention adopts following technical scheme:
A preparation method for aluminium alloy extrusions for duplicating machine hot-rolling, comprises the following steps:
(1) according to element mass percent, meet following requirement: Si 0.2-0.5, Mg 2.8-3.6, Mn 0.6-1.2, Cu 0.3-0.6, Fe 0.2-0.4, Cr 0.25-0.35, Co 0.2-0.3, Zn 0.1-0.2, Ti 0.05-0.15, Be 0.04-0.12, Pb 0.03-0.06, La 0.02-0.03, Pr 0.01-0.02, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 730-750 ℃, carry out melting, add and treat that furnace charge all melts, stir 30-40min, detect alloying constituent and adjust; Then add refining agent to carry out refining, refining temperature is 720-740 ℃, 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%CO+10%Cl
2diversity gas refinery by de-gassing 20-25min, gaseous tension is 0.15-0.20atm, gas flow is 1.6-2.2 m
3/ min, standing 25-35min, fully floats oxidation sludge, starts casting after skimming;
(2) adopt metal mold water-cooled semicontinuous casting technology, aluminium liquid tapping temperature is 700-720 ℃, and casting temp is 695-715 ℃, casting speed is 80-100 mm/min, cooling water pressure is 0.3-0.4MPa, and cooling water intake temperature is not higher than 20 ℃, and water outlet water temperature is not higher than 40 ℃;
(3) strand is carried out to homogenizing processing: first with 180-240 ℃/h, be warming up to 380-420 ℃, insulation 4-6h, with 60-80 ℃/h, be cooled to 260-290 ℃ again, insulation 3-4h, then with 80-120 ℃/h, be warming up to 495-515 ℃, insulation 5-10h, with 70-90 ℃/h, be cooled to 320-350 ℃ again, insulation 4-5h, then high wind is air-cooled to 170-190 ℃, insulation 1-2h, with 100-150 ℃/h, be warming up to 340-380 ℃ again, insulation 3-5h, with 70-90 ℃/h, be warming up to 480-500 ℃ again, insulation 5-10h, then with 120-160 ℃/h, be cooled to 150-180 ℃, insulation 1-2h, putting into 0-5 ℃ of icy salt solution is cooled to below 50 ℃,
(4) ingot casting after treatment homogenizing is heated to 440-460 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 415-435 ℃, container preheating temperature 410-420 ℃, and extruding rate is 17-23m/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 85-95 ℃, insulation 8-12h, with 30-40 ℃/h, be warming up to 170-190 ℃ again, insulation 5-10h, with 50-60 ℃/h, be cooled to 70-80 ℃ again, insulation 10-15h, air cooling is warming up to 90-110 ℃ with 50-60 ℃/h again to room temperature, insulation 8-12h, , then with 40-50 ℃/h, be warming up to 190-210 ℃, insulation 4-8h, with 50-60 ℃/h, be cooled to 80-90 ℃ 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 improving the content of the elements such as Mg, Mn and adding micro-La, Pr rare earth unit Microalloying Effect, improve the weave construction of alloy, crystal grain thinning, put forward heavy alloyed high-temperature stability, make the aluminium alloy extrusions making there is excellent physical strength, high temperature creep and thermotolerance, meet the service requirements of duplicating machine hot-rolling completely.
Embodiment
A preparation method for aluminium alloy extrusions for duplicating machine hot-rolling, comprises the following steps:
(1) according to element mass percent, meet following requirement: Si 0.2-0.5, Mg 2.8-3.6, Mn 0.6-1.2, Cu 0.3-0.6, Fe 0.2-0.4, Cr 0.25-0.35, Co 0.2-0.3, Zn 0.1-0.2, Ti 0.05-0.15, Be 0.04-0.12, Pb 0.03-0.06, La 0.02-0.03, Pr 0.01-0.02, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 745 ℃, 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 725 ℃, and refining time is 25min, standing 30min after skimming, then adjust temperature to 720 ℃, logical 70%N in aluminium liquid
2+ 20%CO+10%Cl
2diversity gas refinery by de-gassing 25min, gaseous tension is 0.20atm, gas flow is 1.8 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 695 ℃, and casting speed is 90 mm/min, and cooling water pressure is 0.3MPa, and cooling water intake temperature is not higher than 20 ℃, and water outlet water temperature is not higher than 40 ℃;
(3) strand is carried out to homogenizing processing: first with 220 ℃/h, be warming up to 410 ℃, insulation 5h, then be cooled to 280 ℃ with 70 ℃/h, insulation 3h, is then warming up to 505 ℃ with 100 ℃/h, insulation 7h, with 80 ℃/h, be cooled to 330 ℃ again, insulation 5h, then high wind is air-cooled to 180 ℃, insulation 2h, then with 120 ℃/h, be warming up to 360 ℃, insulation 4h, with 80 ℃/h, be warming up to 490 ℃ again, insulation 8h, is then cooled to 165 ℃ with 140 ℃/h, insulation 2h, puts into 0-5 ℃ of icy salt solution and is cooled to below 50 ℃;
(4) ingot casting after treatment homogenizing is heated to 450 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 425 ℃, 410 ℃ of container preheating temperatures, and extruding rate is 19m/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, with 40 ℃/h, be warming up to 180 ℃ again, insulation 8h, with 55 ℃/h, be cooled to 70 ℃ again, insulation 15h, air cooling is warming up to 110 ℃ with 60 ℃/h again to room temperature, insulation 8h,, then with 40 ℃/h, be warming up to 195 ℃, insulation 8h, with 500 ℃/h, be cooled to 90 ℃ again, 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 10, Repone K 20, blast-furnace slag 6, volcanic ash 7, fluorite 5, bitter water chestnut soil 6, useless brick powder 4, Graphite Powder 99 3, rhombspar 10, manganese sulfide 2, nano aluminium oxide 2.5, vinyltriethoxysilane 0.6, trolamine 1.5; B. fluorite, bitter water chestnut soil, rhombspar are mixed, 740 ℃ of calcining 3h, 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, 1250 ℃ of calcining 1h, 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, 3000rpm speed lapping 10min, stand-by; C. magnesium chloride and Repone K are mixed, be heated to 780 ℃, after its whole meltings, the powder that adds all the other raw materials and step b to make, stirs 30min, and air prilling, obtains refining agent.
The aluminium alloy extrusions of gained is through checking its salient features to be: tensile strength 423Mpa, and yield strength is 296Mpa, elongation is 19.8%.
Claims (2)
1. a preparation method for aluminium alloy extrusions for duplicating machine hot-rolling, is characterized in that comprising the following steps:
(1) according to element mass percent, meet following requirement: Si 0.2-0.5, Mg 2.8-3.6, Mn 0.6-1.2, Cu 0.3-0.6, Fe 0.2-0.4, Cr 0.25-0.35, Co 0.2-0.3, Zn 0.1-0.2, Ti 0.05-0.15, Be 0.04-0.12, Pb 0.03-0.06, La 0.02-0.03, Pr 0.01-0.02, surplus is that Al prepares burden, furnace charge is dropped into smelting furnace and at 730-750 ℃, carry out melting, add and treat that furnace charge all melts, stir 30-40min, detect alloying constituent and adjust; Then add refining agent to carry out refining, refining temperature is 720-740 ℃, 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%CO+10%Cl
2diversity gas refinery by de-gassing 20-25min, gaseous tension is 0.15-0.20atm, gas flow is 1.6-2.2 m
3/ min, standing 25-35min, fully floats oxidation sludge, starts casting after skimming;
(2) adopt metal mold water-cooled semicontinuous casting technology, aluminium liquid tapping temperature is 700-720 ℃, and casting temp is 695-715 ℃, casting speed is 80-100 mm/min, cooling water pressure is 0.3-0.4MPa, and cooling water intake temperature is not higher than 20 ℃, and water outlet water temperature is not higher than 40 ℃;
(3) strand is carried out to homogenizing processing: first with 180-240 ℃/h, be warming up to 380-420 ℃, insulation 4-6h, with 60-80 ℃/h, be cooled to 260-290 ℃ again, insulation 3-4h, then with 80-120 ℃/h, be warming up to 495-515 ℃, insulation 5-10h, with 70-90 ℃/h, be cooled to 320-350 ℃ again, insulation 4-5h, then high wind is air-cooled to 170-190 ℃, insulation 1-2h, with 100-150 ℃/h, be warming up to 340-380 ℃ again, insulation 3-5h, with 70-90 ℃/h, be warming up to 480-500 ℃ again, insulation 5-10h, then with 120-160 ℃/h, be cooled to 150-180 ℃, insulation 1-2h, putting into 0-5 ℃ of icy salt solution is cooled to below 50 ℃,
(4) ingot casting after treatment homogenizing is heated to 440-460 ℃, then utilizes extrusion machine that the ingot casting after preheating is put into mould extrusion moulding, mold preheating temperature is 415-435 ℃, container preheating temperature 410-420 ℃, and extruding rate is 17-23m/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 85-95 ℃, insulation 8-12h, with 30-40 ℃/h, be warming up to 170-190 ℃ again, insulation 5-10h, with 50-60 ℃/h, be cooled to 70-80 ℃ again, insulation 10-15h, air cooling is warming up to 90-110 ℃ with 50-60 ℃/h again to room temperature, insulation 8-12h, , then with 40-50 ℃/h, be warming up to 190-210 ℃, insulation 4-8h, with 50-60 ℃/h, be cooled to 80-90 ℃ again, insulation 10-15h, air cooling is to room temperature, through surface treatment, finishing, inspect for acceptance, packing gets product.
2. the preparation method with aluminium alloy extrusions for duplicating machine hot-rolling 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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104388772A (en) * | 2014-11-25 | 2015-03-04 | 安徽天祥空调科技有限公司 | Silicon-and-magnesium-containing aluminum alloy sheet for air-conditioning radiator and preparation method of silicon-and-magnesium-containing aluminum alloy sheet |
| CN104404318A (en) * | 2014-11-25 | 2015-03-11 | 安徽天祥空调科技有限公司 | Rare earth strengthening aluminum alloy sheet for air conditioner radiator and preparation method of rare earth strengthening aluminum alloy sheet |
| 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 |
| CN111958191A (en) * | 2020-09-02 | 2020-11-20 | 瑞安市创博机械有限公司 | Processing production process of hot-expanding type aluminum guide roller |
| CN114150191A (en) * | 2021-12-16 | 2022-03-08 | 山西瑞格金属新材料有限公司 | Non-heat-treated high-toughness die-casting aluminum alloy and preparation method thereof |
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