CN105200352A - High-strength light-weight aluminum lithium alloy material and preparation method thereof - Google Patents
High-strength light-weight aluminum lithium alloy material and preparation method thereof Download PDFInfo
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- CN105200352A CN105200352A CN201510482828.XA CN201510482828A CN105200352A CN 105200352 A CN105200352 A CN 105200352A CN 201510482828 A CN201510482828 A CN 201510482828A CN 105200352 A CN105200352 A CN 105200352A
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Abstract
The invention discloses a high-strength light-weight aluminum lithium alloy material and a preparation method thereof. The high-strength light-weight aluminum lithium alloy material comprises the following components in percentage by weight: 3.6-4.2 wt% of lithium, 0.8-1.6 wt% of copper, 2.8-3.8 wt% of magnesium, 0.5-1.2 wt% of silver, 0.08-0.2 wt% of zirconium, 0.2-0.28 wt% of zinc, 0.1-0.2 wt% of manganese, 7.2-10.2 wt% of carbon fiber subjected to preliminary treatment and the balance of aluminum; the finished product is prepared through carbon fiber pretreatment, smelting and sintering. The high-strength light-weight aluminum lithium alloy material provided by the invention has the characteristics of being high in strength, light in weight, and high in toughness, overcomes the detect that the conventional aluminum lithium alloy is low in plasticity, and is further low in cost.
Description
Technical field
The invention belongs to high-performance metal technical field of structural materials, be specifically related to a kind of high-strength light Al-Li alloy material, also relate to the preparation method of this material.
Background technology
Aluminium alloy is a class non-ferrous metal structured material of in industry most widely used, because aluminium alloy density is low but strength ratio is higher, close to or looked into high-quality steel, plasticity is good, various section bar can be processed into, there is excellent thermal conductivity, electroconductibility and erosion resistance, widely apply in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry.
In recent years, due to develop rapidly that is scientific and technical and industrial economy, traditional structural materials is had higher requirement, not only requires its tensile strength zirconium, also need to consider its manufacturing cost and use cost, in aluminium alloy, add elemental lithium caused increasing concern.The people such as Langan and Pickens find: when the add-on of elemental lithium exceedes 1.3% of alloy total amount, the yield strength of alloy and tensile strength all can decline.Also have research to point out, in Al-Li-Cu alloy, add Zr, Ag, Mg, and the excellence that rare earth element can make alloy show intensity and toughness combines.But the temperature-room type plasticity of elemental lithium content influence alloy in raising alloy.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high-strength light Al-Li alloy material of good toughness.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of high-strength light Al-Li alloy material, and this Al-Li alloy material is made up of the component of following weight percent: lithium 3.6-4.2wt%, copper 0.8-1.6wt%, magnesium 2.8-3.8wt%, silver-colored 0.5-1.2wt%, zirconium 0.08-0.2wt%, zinc 0.2-0.28wt%, manganese 0.1-0.2wt%, pretreated carbon fiber 7.2-10.2wt%, surplus are aluminium;
The process of pretreated carbon fiber is specially: carbon fiber bundle is 72-78 DEG C of extracting 4-6h in sick acetone, 25-35min is soaked in 350-360 DEG C in overcritical acetone-water system, be cooled to 28-32 DEG C, after drying, carbon fiber is cut into the short carbon fiber of 2.4-2.6mm, be boil 20-30min in the sulphuric acid soln of 28% as concentration by short carbon fiber, filter, with after distilled water flushing as mass concentration be 15% sodium hydroxide solution in 4-8min, again filter, distilled water flushing, 72-78 DEG C of extracting 4-6h in acetone soln, then dry in the baking oven of 70-90 DEG C.
Further, this Al-Li alloy material is made up of the component of following weight percent: lithium 3.8-4.0wt%, copper 1.2-1.5wt%, magnesium 3.2-3.6wt%, silver-colored 0.7-1.0wt%, zirconium 0.14-0.17wt%, zinc 0.23-0.25wt%, manganese 0.13-0.16wt%, pretreated carbon fiber 8.0-9.2wt%, surplus are aluminium.
Further, this Al-Li alloy material is made up of the component of following weight percent: lithium 3.9wt%, copper 1.4wt%, magnesium 3.5wt%, silver-colored 0.9wt%, zirconium 0.16wt%, zinc 0.24wt%, manganese 0.15wt%, pretreated carbon fiber 8.8wt%, surplus are aluminium.
Another object of the present invention is to the preparation method that a kind of high-strength light Al-Li alloy material is provided, comprise the steps:
(1) according to the metallic substance of above-mentioned ratio, under protection of inert gas, melting, smelting temperature is 300-320 DEG C, and the time is 25-30min;
(2) add pretreated carbon fiber in the metallic substance after melting, stir;
(3) be 0.001Pa-0.005Pa in vacuum tightness, pressure is sinter under the condition of 30-100MPa, during sintering, with the ramp of per minute 10-20 DEG C to 490-510 DEG C, insulation 12-16h, then with the ramp of 5-10 DEG C to 530-550 DEG C, insulation 5-8h, last with the ramp of 5-10 DEG C to 590-610 DEG C, air cooling.
Further, the rare gas element in described step (1) is argon gas.
Beneficial effect of the present invention:
(1) Al-Li alloy of the present invention, has high-strength, lightweight, high tenacity feature, overcomes the inductile shortcoming of traditional Al-Li alloy;
(2) Al-Li alloy of the present invention improves low each opposite sex of alloy material, and reduces production cost.
Embodiment
Embodiment 1
A kind of high-strength light Al-Li alloy material, this Al-Li alloy material is made up of the component of following weight percent: lithium 3.6wt%, copper 0.8wt%, magnesium 2.8wt%, silver-colored 0.5wt%, zirconium 0.08wt%, zinc 0.2wt%, manganese 0.1wt%, pretreated carbon fiber 7.2wt%, surplus are aluminium.
Preparation method:
(1) carbon fiber bundle 72 DEG C of extracting 4h in sick acetone, 25min is soaked in 350 DEG C in overcritical acetone-water system, being cooled to 28 DEG C, after drying, carbon fiber being cut into the short carbon fiber of 2.4mm, is boil 20min in the sulphuric acid soln of 28% as concentration by short carbon fiber, filter, with after distilled water flushing as mass concentration be 15% sodium hydroxide solution in 4min, again filter, distilled water flushing, 72 DEG C of extracting 4h in acetone soln, then dry in the baking oven of 70 DEG C;
(2) according to the metallic substance of above-mentioned ratio, under argon shield, melting, smelting temperature is 300 DEG C, and the time is 25min;
(3) add pretreated carbon fiber in the metallic substance after melting, stir;
(4) be 0.001PaPa in vacuum tightness, pressure is sinter under the condition of 30MPa, during sintering, with the ramp to 490 DEG C of per minute 10 DEG C, and insulation 12h, then with the ramp to 530 DEG C of 5 DEG C, insulation 5h, finally with the ramp to 590 DEG C of 5 DEG C, air cooling.
Embodiment 2
A kind of high-strength light Al-Li alloy material, this Al-Li alloy material is made up of the component of following weight percent: lithium 4.2wt%, copper 1.6wt%, magnesium 3.8wt%, silver-colored 1.2wt%, zirconium 0.2wt%, zinc 0.28wt%, manganese 0.2wt%, pretreated carbon fiber 10.2wt%, surplus are aluminium.
Preparation method:
(1) carbon fiber bundle 78 DEG C of extracting 6h in sick acetone, 35min is soaked in 360 DEG C in overcritical acetone-water system, being cooled to 32 DEG C, after drying, carbon fiber being cut into the short carbon fiber of 2.6mm, is boil 20-30min in the sulphuric acid soln of 28% as concentration by short carbon fiber, filter, with after distilled water flushing as mass concentration be 15% sodium hydroxide solution in 8min, again filter, distilled water flushing, 78 DEG C of extracting 6h in acetone soln, then dry in the baking oven of 90 DEG C;
(2) according to the metallic substance of above-mentioned ratio, under argon shield, melting, smelting temperature is 320 DEG C, and the time is 30min;
(3) add pretreated carbon fiber in the metallic substance after melting, stir;
(4) be 0.005Pa in vacuum tightness, pressure is sinter, during sintering under the condition of 100MPa, with the ramp to 510 DEG C of per minute 20 DEG C, insulation 16h, then with the ramp to 550 DEG C of 10 DEG C, insulation 8h, finally with the ramp to 610 DEG C of 10 DEG C, air cooling.
Embodiment 3
A kind of high-strength light Al-Li alloy material, this Al-Li alloy material is made up of the component of following weight percent: lithium 3.8wt%, copper 1.2wt%, magnesium 3.2wt%, silver-colored 0.7wt%, zirconium 0.14wt%, zinc 0.23wt%, manganese 0.13wt%, pretreated carbon fiber 8.0wt%, surplus are aluminium.
Preparation method:
(1) carbon fiber bundle 75 DEG C of extracting 5h in sick acetone, 30min is soaked in 355 DEG C in overcritical acetone-water system, being cooled to 30 DEG C, after drying, carbon fiber being cut into the short carbon fiber of 2.5mm, is boil 25min in the sulphuric acid soln of 28% as concentration by short carbon fiber, filter, with after distilled water flushing as mass concentration be 15% sodium hydroxide solution in 6min, again filter, distilled water flushing, 75 DEG C of extracting 5h in acetone soln, then dry in the baking oven of 80 DEG C;
(2) according to the metallic substance of above-mentioned ratio, under argon shield, melting, smelting temperature is 310 DEG C, and the time is 28min;
(3) add pretreated carbon fiber in the metallic substance after melting, stir;
(4) be 0.003Pa in vacuum tightness, pressure is sinter under the condition of 65MPa, during sintering, with the ramp to 500 DEG C of per minute 15 DEG C, and insulation 14h, then with the ramp to 540 DEG C of 8 DEG C, insulation 6h, finally with the ramp to 600 DEG C of 8 DEG C, air cooling.
Embodiment 4
Lithium 4.0wt%, copper 1.5wt%, magnesium 3.6wt%, silver-colored 1.0wt%, zirconium 0.17wt%, zinc 0.25wt%, manganese 0.16wt%, pretreated carbon fiber 9.2wt%, surplus are aluminium.
Embodiment 5
Lithium 3.9wt%, copper 1.4wt%, magnesium 3.5wt%, silver-colored 0.9wt%, zirconium 0.16wt%, zinc 0.24wt%, manganese 0.15wt%, pretreated carbon fiber 8.8wt%, surplus are aluminium.
Performance test table
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. a high-strength light Al-Li alloy material, is characterized in that: this Al-Li alloy material is made up of the component of following weight percent: lithium 3.6-4.2wt%, copper 0.8-1.6wt%, magnesium 2.8-3.8wt%, silver-colored 0.5-1.2wt%, zirconium 0.08-0.2wt%, zinc 0.2-0.28wt%, manganese 0.1-0.2wt%, pretreated carbon fiber 7.2-10.2wt%, surplus are aluminium;
The process of pretreated carbon fiber is specially: carbon fiber bundle is 72-78 DEG C of extracting 4-6h in sick acetone, 25-35min is soaked in 350-360 DEG C in overcritical acetone-water system, be cooled to 28-32 DEG C, after drying, carbon fiber is cut into the short carbon fiber of 2.4-2.6mm, be boil 20-30min in the sulphuric acid soln of 28% as concentration by short carbon fiber, filter, with after distilled water flushing as mass concentration be 15% sodium hydroxide solution in 4-8min, again filter, distilled water flushing, 72-78 DEG C of extracting 4-6h in acetone soln, then dry in the baking oven of 70-90 DEG C.
2. a kind of high-strength light Al-Li alloy material according to claim 1, is characterized in that: this Al-Li alloy material is made up of the component of following weight percent: lithium 3.8-4.0wt%, copper 1.2-1.5wt%, magnesium 3.2-3.6wt%, silver-colored 0.7-1.0wt%, zirconium 0.14-0.17wt%, zinc 0.23-0.25wt%, manganese 0.13-0.16wt%, pretreated carbon fiber 8.0-9.2wt%, surplus are aluminium.
3. a kind of high-strength light Al-Li alloy material according to claim 1, is characterized in that: this Al-Li alloy material is made up of the component of following weight percent: lithium 3.9wt%, copper 1.4wt%, magnesium 3.5wt%, silver-colored 0.9wt%, zirconium 0.16wt%, zinc 0.24wt%, manganese 0.15wt%, pretreated carbon fiber 8.8wt%, surplus are aluminium.
4. realize a preparation method for high-strength light Al-Li alloy material according to claim 1, it is characterized in that: comprise the steps:
(1) according to the metallic substance of above-mentioned ratio, under protection of inert gas, melting, smelting temperature is 300-320 DEG C, and the time is 25-30min;
(2) add pretreated carbon fiber in the metallic substance after melting, stir;
(3) be 0.001Pa-0.005Pa in vacuum tightness, pressure is sinter under the condition of 30-100MPa, during sintering, with the ramp of per minute 10-20 DEG C to 490-510 DEG C, insulation 12-16h, then with the ramp of 5-10 DEG C to 530-550 DEG C, insulation 5-8h, last with the ramp of 5-10 DEG C to 590-610 DEG C, air cooling.
5. the preparation method of high-strength light Al-Li alloy material according to claim 4, is characterized in that: the rare gas element in described step (1) is argon gas.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076859A (en) * | 1989-12-26 | 1991-12-31 | Aluminum Company Of America | Heat treatment of aluminum-lithium alloys |
| CN102888750A (en) * | 2012-10-29 | 2013-01-23 | 哈尔滨工业大学 | Method for modifying surface of carbon fiber |
| CN104264083A (en) * | 2014-09-15 | 2015-01-07 | 河南科技大学 | Carbon fiber-reinforced aluminium-lithium alloy composite material and preparation method thereof |
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- 2015-08-08 CN CN201510482828.XA patent/CN105200352A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5076859A (en) * | 1989-12-26 | 1991-12-31 | Aluminum Company Of America | Heat treatment of aluminum-lithium alloys |
| CN102888750A (en) * | 2012-10-29 | 2013-01-23 | 哈尔滨工业大学 | Method for modifying surface of carbon fiber |
| CN104264083A (en) * | 2014-09-15 | 2015-01-07 | 河南科技大学 | Carbon fiber-reinforced aluminium-lithium alloy composite material and preparation method thereof |
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Application publication date: 20151230 |