CN103484738A - Production technique of high-damage-resistance aluminum alloy plate - Google Patents
Production technique of high-damage-resistance aluminum alloy plate Download PDFInfo
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Abstract
The invention discloses a production technique of a high-damage-resistance aluminum alloy plate. The aluminum alloy comprises the following elements in percentage by mass: 3.2-3.6% of Cu, 1.1-1.4% of Mg, 0.6-0.9% of Mn, 0.4-0.8% of Zr, 0.3-0.6% of Mo, 0.15-0.25% of Li, 0.1-0.2% of Ga, 0.05-0.15% of Co, 0.04-0.07% of Fe, 0.03-0.05% of Si, 0.06-0.12% of Er, 0.04-0.08% of Sc and the balance of Al. On the basis of lowering the Fe/Si ratio and Cu content, Zr, Er, Sc, Li and other elements are added for microalloying to reduce the solidified eutectic phase and heat treatment excess phase and reduce the fatigue crack generation probability; the microalloying forms a disperse phase coherent with the base to keep the deformation recovery subgrain structure; and the thermomechanical treatment improves the distribution uniformity of the precipitated phase to effectively enhance the fatigue crack propagation resistance, thereby greatly enhancing the damage resistance of the existing aluminum alloy material on the premise of ensuring the strength and toughness of the aluminum alloy material.
Description
Technical field
The present invention relates to a kind of production technique of high damnification resistant aluminum alloy Strip, belong to the aluminum alloy materials technical field.
Background technology
Aluminium alloy because its density is little, specific tenacity and specific rigidity is high, good springiness, good, corrosion-resistant, wear-resisting, the easy surface colour of shock resistance, good processing forming and the high characteristics such as reclaiming, be widely used in the fields such as Aeronautics and Astronautics, automobile, machinofacture, boats and ships, building, finishing.Along with the develop rapidly of science and technology and industrial economy in recent years, further improve the aluminum alloy materials performance and become the common problem of paying close attention to of current international Aluminum circle, yet in the intensity and toughness that improve aluminum alloy materials, the weather resistance of aluminum alloy materials and damage tolerance can't synchronously improve, and even reduce.
Summary of the invention
In order to address the above problem, the invention provides a kind of production technique of high damnification resistant aluminum alloy Strip, when guaranteeing to improve the intensity and toughness of aluminum alloy materials, improve its traumatic resistance, extend its work-ing life.
The technical solution used in the present invention is as follows:
A kind of production technique of high damnification resistant aluminum alloy sheet material comprises the following steps:
(1) meet following the requirement according to the element mass percent: Cu 3.2-3.6, Mg 1.1-1.4, Mn 0.6-0.9, Zr 0.4-0.8, Mo 0.3-0.6, Li 0.15-0.25, Ga 0.1-0.2, Co 0.05-0.15, Fe 0.04-0.07, Si 0.03-0.05, Er 0.06-0.12, Sc 0.04-0.08, surplus are that Al is prepared burden, furnace charge is dropped into to smelting furnace carry out melting under 740-760 ℃, treat that metal all melts, after stirring, respectively get a sample in middle part, the burner hearth both sides of the aluminium liquid degree of depth and analyzed, analyze after qualified and get final product converter;
(2) after melt proceeds to standing furnace, take nitrogen as carrier, 2/3 place that the refining agent powder is sprayed into to the aluminium liquid degree of depth carries out refining, nitrogen pressure is 1.1-1.6kg/mm, refining temperature is 715-735 ℃, and refining time is 15-25min, standing 20-30min after refining;
(3) before the casting, with 14 order glass fiber cloth, filter, fully oxide compound, the slag inclusion in the elimination melt, then cast, and casting temp is 670-700 ℃;
(4) alloy cast ingot first is warming up to 310-340 ℃ with 120-150 ℃/h, insulation 6-8h, be warming up to 480-490 ℃ with 70-80 ℃/h again, insulation 10-12h, and then be cooled to 280-320 ℃ with 80-100 ℃/h, insulation 3-5h, then be warming up to 495-515 ℃ with 105-125 ℃/h, insulation 12-16h, finally be down to rapidly room temperature with the speed of cooling of 220-240 ℃/h; After homogenizing annealing, ingot casting surface blunderbuss is washed, to remove the defect such as the lip-deep casting knurl of ingot casting;
(5) ingot casting after blunderbuss is washed is at 400-430 ℃ of lower preheating 1-2h, and being hot-rolled down to thickness is 5-6mm, and air cooling is to room temperature, then be warming up to 220-240 ℃ with 80-100 ℃/h, insulation 3-5h, then be warming up to 450-470 ℃ with 110-120 ℃/h, insulation 0.5-1h, then be cooled to 330-360 ℃ with 70-80 ℃/h, insulation 1-2h, then be cooled to 160-180 ℃ with 80-100 ℃/h, insulation 3-5h, air cooling is 2-2.5mm to being cold-rolled to thickness after room temperature, and total deformation reaches more than 80%;
(6) by the solution hardening 30-50min at 470-500 ℃ of temperature of the sheet material after moulding, press polish is aligned to 2.0mm, and natural aging, more than 96 hours, obtains high damnification resistant aluminum alloy sheet material.
Described refining agent preparation method is as follows: a. takes the raw material of following weight part: SODIUMNITRATE 10-15, magnesium chloride 12-16, Sodium Silicofluoride 5-10, bariumchloride 4-8, refractory brick bits 5-10, norbide 4-8, Zirconium tetrafluoride 3-6, loess 8-12, attapulgite 5-10; B. above-mentioned refractory brick bits, attapulgite, loess were pulverized to the 300-500 mesh sieve, after mixing, added norbide and Zirconium tetrafluoride, 4000-5000rpm speed lapping 5-10min then calcines 3-5h under 1050-1250 ℃, and then shrend is cooling, grind, stand-by; C. all the other each raw materials are mixed and are heated to 760-780 ℃, after its whole meltings, clarification 1-2h, be poured into water cold quenching by top clear liquor, obtains broken particle, and porphyrize is crossed the 300-400 mesh sieve, stand-by; D. mixing of materials step b, c obtained stirs and obtains described refining agent.
The de-percentage of admixture of refining agent of the present invention between 65-75%, remove the inclusion in aluminium alloy and make inclusion modification effective, purify aluminium alloy and improved internal soundness, degree of porosity reduces the 1-2 degree, is controlled effectively.
Beneficial effect of the present invention:
The present invention is based on and reduce on Fe/Si, reduction Cu content, interpolation Zr, Er, the elements such as Sc, Li carry out microalloying, can reduce and solidify eutectic phase and the superfluous phase of thermal treatment, reduce the fatigue crack initiation probability; Microalloying forms with the disperse phase of matrix coherence and keeps deformation recovery subgrain tissue, thermomechanical treatment improves the distributing homogeneity of precipitated phase, can effectively improve expanding resistance of fatigue crack, thereby, in the intensity and toughness that guarantee aluminum alloy materials, significantly promote the traumatic resistance energy of existing aluminum alloy materials.
embodiment
A kind of production technique of high damnification resistant aluminum alloy sheet material comprises the following steps:
(1) meet following the requirement according to the element mass percent: Cu 3.2-3.6, Mg 1.1-1.4, Mn 0.6-0.9, Zr 0.4-0.8, Mo 0.3-0.6, Li 0.15-0.25, Ga 0.1-0.2, Co 0.05-0.15, Fe 0.04-0.07, Si 0.03-0.05, Er 0.06-0.12, Sc 0.04-0.08, surplus are that Al is prepared burden, furnace charge is dropped into to smelting furnace carry out melting under 740-76050 ℃, treat that metal all melts, after stirring, respectively get a sample in middle part, the burner hearth both sides of the aluminium liquid degree of depth and analyzed, analyze after qualified and get final product converter;
(2) after melt proceeds to standing furnace, take nitrogen as carrier, 2/3 place that the refining agent powder is sprayed into to the aluminium liquid degree of depth carries out refining, and nitrogen pressure is 1.4kg/mm, and refining temperature is 720 ℃, and refining time is 25min, standing 20min after refining;
(3) before the casting, with 14 order glass fiber cloth, filter, fully oxide compound, the slag inclusion in the elimination melt, then cast, and casting temp is 690 ℃;
(4) alloy cast ingot first is warming up to 320 ℃ with 140 ℃/h, insulation 8h, then be warming up to 480 ℃ with 80 ℃/h, insulation 12h, and then be cooled to 310 ℃ with 100 ℃/h, insulation 4h, be warming up to 505 ℃ with 120 ℃/h again, insulation 15h, finally be down to rapidly room temperature with the speed of cooling of 240 ℃/h; After homogenizing annealing, ingot casting surface blunderbuss is washed, to remove the defect such as the lip-deep casting knurl of ingot casting;
(5) ingot casting after blunderbuss is washed is at 420 ℃ of lower preheating 1.5h, and being hot-rolled down to thickness is 5mm, and air cooling is to room temperature, then be warming up to 230 ℃ with 100 ℃/h, insulation 4h, then be warming up to 460 ℃ with 120 ℃/h, insulation 0.5h, then be cooled to 350 ℃ with 80 ℃/h, insulation 1h, then be cooled to 160 ℃ with 100 ℃/h, insulation 5h, air cooling is 2.2mm to being cold-rolled to thickness after room temperature, and total deformation reaches more than 80%;
(6) by the solution hardening 40min at 480 ℃ of temperature of the sheet material after moulding, press polish is aligned to 2.0mm, and natural aging, more than 96 hours, obtains high damnification resistant aluminum alloy sheet material.
Described refining agent preparation method is as follows: a. takes the raw material of following weight (lg): SODIUMNITRATE 10, magnesium chloride 14, Sodium Silicofluoride 8, bariumchloride 6, refractory brick bits 8, norbide 5, Zirconium tetrafluoride 4, loess 10, attapulgite 8; B. above-mentioned refractory brick bits, attapulgite, loess were pulverized to 300 mesh sieves, and after mixing, added norbide and Zirconium tetrafluoride, 4000rpm speed lapping 10min then calcines 4h under 1100 ℃, and then shrend is cooling, grinds, stand-by; C. all the other each raw materials are mixed and are heated to 770 ℃, after its whole meltings, clarification 2h, be poured into water cold quenching by top clear liquor, obtains broken particle, and porphyrize is crossed 400 mesh sieves, stand-by; D. mixing of materials step b, c obtained stirs and obtains described refining agent.
The aluminum alloy plate materials of gained through the check mechanical property is: tensile strength 368Mpa, and yield strength is 252Mpa, elongation is 14.5%.
Claims (2)
1. the production technique of a high damnification resistant aluminum alloy sheet material is characterized in that comprising the following steps:
(1) meet following the requirement according to the element mass percent: Cu 3.2-3.6, Mg 1.1-1.4, Mn 0.6-0.9, Zr 0.4-0.8, Mo 0.3-0.6, Li 0.15-0.25, Ga 0.1-0.2, Co 0.05-0.15, Fe 0.04-0.07, Si 0.03-0.05, Er 0.06-0.12, Sc 0.04-0.08, surplus are that Al is prepared burden, furnace charge is dropped into to smelting furnace carry out melting under 740-760 ℃, treat that metal all melts, after stirring, respectively get a sample in middle part, the burner hearth both sides of the aluminium liquid degree of depth and analyzed, analyze after qualified and get final product converter;
(2) after melt proceeds to standing furnace, take nitrogen as carrier, 2/3 place that the refining agent powder is sprayed into to the aluminium liquid degree of depth carries out refining, nitrogen pressure is 1.1-1.6kg/mm, refining temperature is 715-735 ℃, and refining time is 15-25min, standing 20-30min after refining;
(3) before the casting, with 14 order glass fiber cloth, filter, fully oxide compound, the slag inclusion in the elimination melt, then cast, and casting temp is 670-700 ℃;
(4) alloy cast ingot first is warming up to 310-340 ℃ with 120-150 ℃/h, insulation 6-8h, be warming up to 480-490 ℃ with 70-80 ℃/h again, insulation 10-12h, and then be cooled to 280-320 ℃ with 80-100 ℃/h, insulation 3-5h, then be warming up to 495-515 ℃ with 105-125 ℃/h, insulation 12-16h, finally be down to rapidly room temperature with the speed of cooling of 220-240 ℃/h; After homogenizing annealing, ingot casting surface blunderbuss is washed, to remove the defect such as the lip-deep casting knurl of ingot casting;
(5) ingot casting after blunderbuss is washed is at 400-430 ℃ of lower preheating 1-2h, and being hot-rolled down to thickness is 5-6mm, and air cooling is to room temperature, then be warming up to 220-240 ℃ with 80-100 ℃/h, insulation 3-5h, then be warming up to 450-470 ℃ with 110-120 ℃/h, insulation 0.5-1h, then be cooled to 330-360 ℃ with 70-80 ℃/h, insulation 1-2h, then be cooled to 160-180 ℃ with 80-100 ℃/h, insulation 3-5h, air cooling is 2-2.5mm to being cold-rolled to thickness after room temperature, and total deformation reaches more than 80%;
(6) by the solution hardening 30-50min at 470-500 ℃ of temperature of the sheet material after moulding, press polish is aligned to 2.0mm, and natural aging, more than 96 hours, obtains high damnification resistant aluminum alloy sheet material.
2. the production technique of high damnification resistant aluminum alloy sheet material 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: SODIUMNITRATE 10-15, magnesium chloride 12-16, Sodium Silicofluoride 5-10, bariumchloride 4-8, refractory brick bits 5-10, norbide 4-8, Zirconium tetrafluoride 3-6, loess 8-12, attapulgite 5-10; B. above-mentioned refractory brick bits, attapulgite, loess were pulverized to the 300-500 mesh sieve, after mixing, added norbide and Zirconium tetrafluoride, 4000-5000rpm speed lapping 5-10min then calcines 3-5h under 1050-1250 ℃, and then shrend is cooling, grind, stand-by; C. all the other each raw materials are mixed and are heated to 760-780 ℃, after its whole meltings, clarification 1-2h, be poured into water cold quenching by top clear liquor, obtains broken particle, and porphyrize is crossed the 300-400 mesh sieve, stand-by; D. mixing of materials step b, c obtained stirs and obtains described refining agent.
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Cited By (9)
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| CN103966489A (en) * | 2014-04-09 | 2014-08-06 | 马鞍山新嘉机械制造有限公司 | Casting technology for zirconium element-doped aluminium alloy plate |
| CN103966470A (en) * | 2014-04-09 | 2014-08-06 | 马鞍山新嘉机械制造有限公司 | Casting technology for automobile aluminium alloy plate difficult in breakage |
| CN105483579A (en) * | 2016-01-12 | 2016-04-13 | 苏州有色金属研究院有限公司 | Machining technology for improving fatigue damage resisting performance of 2xxx aluminum alloy plate |
| CN106435304A (en) * | 2016-08-27 | 2017-02-22 | 来安县科来兴实业有限责任公司 | Anti-cracking aluminum alloy special for motor train unit gear case body and preparing method of anti-cracking aluminum alloy |
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| CN110423926A (en) * | 2019-07-29 | 2019-11-08 | 中国航发北京航空材料研究院 | A kind of heat-resisting aluminium lithium alloy and preparation method thereof |
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| CN103966489A (en) * | 2014-04-09 | 2014-08-06 | 马鞍山新嘉机械制造有限公司 | Casting technology for zirconium element-doped aluminium alloy plate |
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| CN106435304B (en) * | 2016-08-27 | 2019-03-26 | 来安县科来兴实业有限责任公司 | A kind of dedicated cracking resistance aluminium alloy of EMU gear case body and preparation method thereof |
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| CN108988255A (en) * | 2018-06-11 | 2018-12-11 | 江苏中讯电力科技有限公司 | A kind of high intensity illumination bus duct |
| CN109719131A (en) * | 2018-12-29 | 2019-05-07 | 中国商用飞机有限责任公司 | Thermoforming method of 2000 series aluminum alloy plate |
| CN109719131B (en) * | 2018-12-29 | 2020-09-04 | 中国商用飞机有限责任公司 | Thermoforming method of 2000 series aluminum alloy plate |
| CN110423926A (en) * | 2019-07-29 | 2019-11-08 | 中国航发北京航空材料研究院 | A kind of heat-resisting aluminium lithium alloy and preparation method thereof |
| CN111074180A (en) * | 2019-12-23 | 2020-04-28 | 安徽悦未科技有限公司 | High-strength pressure-resistant aluminum alloy cast rod for heavy truck hub and preparation process thereof |
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