CN104018034A - Lightweight aluminum-lithium alloy material and production method thereof. - Google Patents
Lightweight aluminum-lithium alloy material and production method thereof. Download PDFInfo
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- CN104018034A CN104018034A CN201410264346.2A CN201410264346A CN104018034A CN 104018034 A CN104018034 A CN 104018034A CN 201410264346 A CN201410264346 A CN 201410264346A CN 104018034 A CN104018034 A CN 104018034A
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Abstract
The invention relates to a lightweight aluminum-lithium alloy material and a production method thereof. The aluminum-lithium alloy material disclosed by the invention comprises the following components in percentage by weight: 4-6.5wt% of lithium, 0.5-3wt% of copper, 0.1-0.5wt% of tin, 0.8-1.5wt% of zinc, 0.05- 0.1wt% of lead and less than or equal to 0.2wt% of inevitable impurities and the balance of aluminum. The aluminum-lithium alloy material disclosed by the invention has the advantages of lower density, light weight, low anisotropy, high weldability, high strength and significantly reduced manufacturing cost. The aluminum-lithium alloy material disclosed by the invention can be widely used in aircraft connectors, machinery manufacturing, transportation machinery, power machinery and other aviation industry.
Description
Technical field
The present invention relates to a kind of Al-Li alloy material and production method thereof, particularly relate to a kind of low each opposite sex, weldability and high-intensity Al-Li alloy material and production method thereof.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry, widely applies.Along with the develop rapidly of science and technology and industrial economy in recent years, increasing to the demand of aldural welding structural element.
Because aluminium alloy density is low, but strength ratio is higher, approaches or surpasses high-quality steel, and plasticity is good, can be processed into various section bars, has good electroconductibility, thermal conductivity and corrosion stability, industrial being widely used, and usage quantity is only second to steel.
New research direction as aluminium alloy---Al-Li alloy has low density, high specific strength and specific rigidity, good low-temperature performance and erosion resistance and the good advantages such as superplasticity.With Al-Li alloy, replace conventional aluminium alloy and can make texture quality alleviate 10%～15%, rigidity improves 15%～20%, is a kind of desirable aerospace structure material.Owing to often adopting the form of linker between space structure part, by weldprocedure, replace traditional rivetstructure can alleviate texture quality, reduce time of setting-up, therefore, how Al-Li alloy is alleviated quality and improve weldability and have higher requirement.
The Reynolds metal company of the U.S. is cooperated with Martin Maritta company, exploitation Weldlite series aluminum lithium alloy.This series alloy has the feature of high strength weldable, and tensile strength reaches as high as 700MPa; Under multiple weldprocedure, all can form fine and close weld seam, its weld strength and toughness are all apparently higher than other conventional aluminum alloys.Weldalite alloy comprises Weldalite
tM049 and 210 two alloy series, wherein Weldalite
tM210 alloys have higher weldability, its chemical composition and correlated performance all meet the application of aerospace structure material, it is universally recognized material of present stage, but because it is by adding silver (Ag), improve the welding property of material, therefore also improved the corresponding cost of Al-Li alloy.
To sum up, need at present a kind of not only cost lower, and the Al-Li alloy material that quality is light, weldability is high.
Summary of the invention
The object of the invention is to, by improving design of alloy and according to the feature optimized production process of alloy, provide a kind of and improved the intensity of Al-Li alloy in prior art, reduced alloy density, improved weldability, reduce anisotropy and significantly reduce Al-Li alloy material and the production method thereof of material cost.
For achieving the above object, technical scheme provided by the present invention is:
An Al-Li alloy material, is comprised of the component of following weight percent: lithium 4-6.5wt%, copper: 0.5-3wt%, tin: 0.1-0.5wt%, zinc: 0.8-1.5wt%, lead: 0.05-0.1wt%, inevitably impurity is less than or equal to 0.2wt%, and surplus is aluminium.
Preferably, a kind of Al-Li alloy material, is comprised of the component of following weight percent: lithium 4.5-6.0wt%, copper: 1.0-2.5wt%, tin: 0.2-0.4wt%, zinc: 1.0wt%, plumbous: 0.75wt%, inevitably impurity is less than or equal to 0.2wt%, and surplus is aluminium.
Preferably, a kind of Al-Li alloy material, is characterized in that, consists of: lithium 5.0wt% the component of following weight percent, copper: 1.5wt%, tin: 0.3wt%, zinc: 1.0wt%, plumbous: 0.75wt%, inevitably impurity is less than or equal to 0.2wt%, and surplus is aluminium.
The production method that the invention provides a kind of Al-Li alloy material, has following steps:
1) raw metal is mixed by described mass ratio, melting at 750-800 ℃, smelting time is 1.5-2 hour;
2) adopt spectroscopic analysis to detect the alloy liquid that melting completes, determine that its composition is within scope;
3) adopt the mode of continuous casting to produce blank billet, the diameter of described blank billet is 20-50mm, and length is 3-4 rice;
4) ageing treatment, envrionment temperature is 200-220 ℃, the aging anneal time is 1.5 hours;
5) the alloy material stretch forming described annealing being completed.
Further: wherein, the alloy material that described annealing is completed is drawn into the finished product that diameter is 5mm-40mm.
The present invention also provides the purposes of above-mentioned Al-Li alloy material in preparation space flight and aviation structured material.
Adopt technique scheme, beneficial effect of the present invention has:
1, the invention provides a kind of Al-Li alloy material and manufacture method thereof, met low density, high specific strength and specific rigidity, low-temperature performance and erosion resistance to multi-purpose material, superplasticity, high strength, weldability, low each opposite sex and multiple needs cheaply simultaneously.
2, the integral body that the present invention replaces repeatedly thermal treatment with extruding or the mode that forges has realized quality of materials reduces.
3, this material is due to lower density and higher weldability, it is a kind of desirable spacecraft construction material, can be widely used in the aspects such as machinofacture, Transport Machinery, power machine and aircraft industry, such as the link span of interior of aircraft, the union lever of high speed motor car interior etc.
Embodiment
Embodiment 1, the preparation of Al-Li alloy material of the present invention
Batching melting: be lithium 4wt% by ready raw metal mass ratio, copper: 3wt%, tin: 0.1wt%, zinc: 1.5wt%, plumbous: 0.05wt%, inevitably impurity is less than or equal to 0.2wt%, and the ratio that surplus is aluminium is put into smelting furnace, smelting furnace temperature is 750 ℃, and the time is 2 hours.
Detect: adopt spectroscopic analysis to detect the alloy liquid that melting completes, determine that its composition is within scope.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current machine, realize micro-anti-technique that pushes away of journey of drawing, produce large volume heave hand base, through two-sided milling milling face unit, mill made-up belt epidermis defect, through cold-rolling mill, cutting into diameter is 20-50mm, and length is the blank billet of 3-4 rice.
Extrusion molding: ingot blank is made it to flow out from nib in container.
Ageing treatment: adopt artificial aging to process, envrionment temperature is 200 ℃, eliminates internal stress, and the aging anneal time is 1.5 hours.
Scrub aligning: by pickling, scrub operation, remove remained on surface and oxide compound, by aligning operation, eliminate internal stress, alloy material is drawn into finished product.
The Al-Li alloy material of preparing according to embodiments of the invention and isopyknic aluminium alloy 7050, Al-Li alloy 8090 are contrasted, and under 20 ℃ of extruded material T6 states, each performance perameter is as shown in table 1:
Table 1
Embodiment 2, the preparation of Al-Li alloy material of the present invention
Batching melting: be lithium 5wt% by ready raw metal mass ratio, copper: 1.5wt%, tin: 0.4wt%, zinc: 1wt%, plumbous: 0.05wt%, inevitably impurity is less than or equal to 0.2wt%, and the ratio that surplus is aluminium is put into smelting furnace, smelting furnace temperature is 800 ℃, and the time is 1.5 hours.
Detect: adopt spectroscopic analysis to detect the alloy liquid that melting completes, determine that its composition is within scope.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current machine, realize micro-anti-technique that pushes away of journey of drawing, produce large volume heave hand base, through two-sided milling milling face unit, mill made-up belt epidermis defect, through cold-rolling mill, cutting into diameter is 20-50mm, and length is the blank billet of 3-4 rice.
Extrusion molding: ingot blank is made it to flow out from nib in container.
Ageing treatment: adopt artificial aging to process, envrionment temperature is 200 ℃, eliminates internal stress, and the aging anneal time is 1.5 hours.
Scrub aligning: by pickling, scrub operation, remove remained on surface and oxide compound, by aligning operation, eliminate internal stress, alloy material is drawn into finished product.
The Al-Li alloy material of preparing according to embodiments of the invention and isopyknic aluminium alloy 7050, Al-Li alloy 8090 are contrasted, and under 20 ℃ of extruded material T6 states, each performance perameter is as shown in table 2:
Table 2
Embodiment 3, the preparation of Al-Li alloy material of the present invention
Batching melting: be lithium 4.5wt% by ready raw metal mass ratio, copper: 2.5wt%, tin: 0.3wt%, zinc: 0.8wt%, plumbous: 0.75wt%, inevitably impurity is less than or equal to 0.2wt%, and the ratio that surplus is aluminium is put into smelting furnace, smelting furnace temperature is 750 ℃, and the time is 1.5 hours.
Detect: adopt spectroscopic analysis to detect the alloy liquid that melting completes, determine that its composition is within scope.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current machine, realize micro-anti-technique that pushes away of journey of drawing, produce large volume heave hand base, through two-sided milling milling face unit, mill made-up belt epidermis defect, through cold-rolling mill, cutting into diameter is 20-50mm, and length is the blank billet of 3-4 rice.
Extrusion molding: ingot blank is made it to flow out from nib in container.
Ageing treatment: adopt artificial aging to process, envrionment temperature is 200 ℃, eliminates internal stress, and the aging anneal time is 1.5 hours.
Scrub aligning: by pickling, scrub operation, remove remained on surface and oxide compound, by aligning operation, eliminate internal stress, alloy material is drawn into finished product.
The Al-Li alloy material of preparing according to embodiments of the invention and isopyknic aluminium alloy 7050, Al-Li alloy 8090 are contrasted, and under 20 ℃ of extruded material T6 states, each performance perameter is as shown in table 3:
Table 3
Embodiment 4, the preparation of Al-Li alloy material of the present invention
Batching melting: by ready raw metal mass ratio, be lithium 6.0wt%, copper: 1wt%, tin: 0.2wt%, zinc: 1wt%, lead: 0.1wt%, inevitably impurity is less than or equal to 0.2wt%, surplus is that the ratio of aluminium is put into smelting furnace, and smelting furnace temperature is 800 ℃, and the time is 2 hours.
Detect: adopt spectroscopic analysis to detect the alloy liquid that melting completes, determine that its composition is within scope.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current machine, realize micro-anti-technique that pushes away of journey of drawing, produce large volume heave hand base, through two-sided milling milling face unit, mill made-up belt epidermis defect, through cold-rolling mill, cutting into diameter is 20-50mm, and length is the blank billet of 3-4 rice.
Extrusion molding: ingot blank is made it to flow out from nib in container.
Ageing treatment: adopt artificial aging to process, envrionment temperature is 200 ℃, eliminates internal stress, and the aging anneal time is 1.5 hours.
Scrub aligning: by pickling, scrub operation, remove remained on surface and oxide compound, by aligning operation, eliminate internal stress, alloy material is drawn into finished product.
The Al-Li alloy material of preparing according to embodiments of the invention and isopyknic aluminium alloy 7050, Al-Li alloy 8090 are contrasted, and under 20 ℃ of extruded material T6 states, each performance perameter is as shown in table 4:
Table 4
Embodiment 5, the preparation of Al-Li alloy material of the present invention
Batching melting: be lithium 6.5wt% by ready raw metal mass ratio, copper: 0.5wt%, tin: 0.5wt%, zinc: 1wt%, plumbous: 0.75wt%, inevitably impurity is less than or equal to 0.2wt%, and the ratio that surplus is aluminium is put into smelting furnace, smelting furnace temperature is 750 ℃, and the time is 1.5 hours.
Detect: adopt spectroscopic analysis to detect the alloy liquid that melting completes, determine that its composition is within scope.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current machine, realize micro-anti-technique that pushes away of journey of drawing, produce large volume heave hand base, through two-sided milling milling face unit, mill made-up belt epidermis defect, through cold-rolling mill, cutting into diameter is 20-50mm, and length is the blank billet of 3-4 rice.
Extrusion molding: ingot blank is made it to flow out from nib in container.
Ageing treatment: adopt artificial aging to process, envrionment temperature is 200 ℃, eliminates internal stress, and the aging anneal time is 1.5 hours.
Scrub aligning: by pickling, scrub operation, remove remained on surface and oxide compound, by aligning operation, eliminate internal stress, alloy material is drawn into finished product.
The Al-Li alloy material of preparing according to embodiments of the invention and isopyknic aluminium alloy 7050, Al-Li alloy 8090 are contrasted, and under 20 ℃ of extruded material T6 states, each performance perameter is as shown in table 5:
Table 5
The above embodiment has only expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (6)
1. an Al-Li alloy material, is characterized in that, consists of: lithium 4-6.5wt% the component of following weight percent, copper: 0.5-3wt%, tin: 0.1-0.5wt%, zinc: 0.8-1.5wt%, plumbous: 0.05-0.1wt%, inevitably impurity is less than or equal to 0.2wt%, and surplus is aluminium.
2. a kind of Al-Li alloy material according to claim 1, it is characterized in that, component by following weight percent forms: lithium 4.5-6.0wt%, copper: 1.0-2.5wt%, tin: 0.2-0.4wt%, zinc: 1.0wt%, lead: 0.75wt%, inevitably impurity is less than or equal to 0.2wt%, and surplus is aluminium.
3. a kind of Al-Li alloy material according to claim 1, is characterized in that, consists of: lithium 5.0wt% the component of following weight percent, copper: 1.5wt%, tin: 0.3wt%, zinc: 1.0wt%, plumbous: 0.75wt%, inevitably impurity is less than or equal to 0.2wt%, and surplus is aluminium.
4. according to the production method of the described Al-Li alloy material of claim 1-3 any one, it is characterized in that thering are following steps:
1) raw metal is mixed by described mass ratio, melting at 750-800 ℃, smelting time is 1.5-2 hour;
2) adopt spectroscopic analysis to detect the alloy liquid that melting completes, determine that its composition is within scope;
3) adopt the mode of continuous casting to produce blank billet, the diameter of described blank billet is 20-50mm, and length is 3-4 rice;
4) ageing treatment, envrionment temperature is 200-220 ℃, the aging anneal time is 1.5 hours;
5) the alloy material stretch forming described annealing being completed.
5. the production method of Al-Li alloy material according to claim 4, is characterized in that: wherein, the alloy material that described annealing is completed is drawn into the finished product that diameter is 5mm-40mm.
6. the purposes in preparation space flight and aviation structured material according to the Al-Li alloy material described in claim 1-3 any one.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967589A (en) * | 2010-10-27 | 2011-02-09 | 中国航空工业集团公司北京航空材料研究院 | Medium-strength high-toughness aluminum lithium alloy and preparation method thereof |
| CN103492596A (en) * | 2011-02-17 | 2014-01-01 | 美铝公司 | 2xxx series aluminum lithium alloys |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967589A (en) * | 2010-10-27 | 2011-02-09 | 中国航空工业集团公司北京航空材料研究院 | Medium-strength high-toughness aluminum lithium alloy and preparation method thereof |
| CN103492596A (en) * | 2011-02-17 | 2014-01-01 | 美铝公司 | 2xxx series aluminum lithium alloys |
Non-Patent Citations (1)
| Title |
|---|
| 霍红庆，郝维新，耿桂宏等: ""航天轻型结构材料——铝锂合金的发展"", 《真空与低温》, vol. 11, no. 2, 30 June 2005 (2005-06-30), pages 63 - 69 * |
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