CN103993204B - A kind of aluminium lithium alloy rod and production method thereof of less anisotropy - Google Patents
A kind of aluminium lithium alloy rod and production method thereof of less anisotropy Download PDFInfo
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- CN103993204B CN103993204B CN201410261998.0A CN201410261998A CN103993204B CN 103993204 B CN103993204 B CN 103993204B CN 201410261998 A CN201410261998 A CN 201410261998A CN 103993204 B CN103993204 B CN 103993204B
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Abstract
The present invention relates to a kind of less anisotropy, weldability and high-intensity aluminium lithium alloy rod and production method thereof. Aluminium lithium alloy rod of the present invention is made up of the component of following percentage by weight: lithium 6-7.5wt%, and copper: 4-6wt%, magnesium: 0.1-0.3wt%, tin 0.4-0.8wt%, zinc: 0.2-0.4wt%, manganese 0.05-0.3wt%, lanthanum and cerium: 0.2-0.4wt%, surplus is aluminium. Aluminium lithium alloy rod of the present invention is by improving the content of lithium metal in alloy, and preferably add metallic copper, magnesium, tin, zinc, manganese, lanthanum and cerium, make aluminium lithium alloy rod of the present invention not only there is low each opposite sex, weldability and high strength, and manufacturing cost significantly reduce. Aluminium lithium alloy rod of the present invention can be widely used in the aspects such as machine-building, Transport Machinery, dynamic power machine and aircraft industry.
Description
Technical field
The present invention relates to a kind of aluminium lithium alloy rod and production method thereof, particularly relate to a kind of low differentProperty, weldability and high-intensity aluminium lithium alloy rod and production method thereof.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structural material in industry, Aeronautics and Astronautics,In automobile, machine-building, boats and ships and chemical industry, widely apply. Along with in recent years science and technology withAnd the develop rapidly of industrial economy, increasing to the demand of high-strength aluminum alloy welding structural element.
Because aluminium alloy density is low, but strength ratio is higher, approaches or exceedes high-quality steel, and plasticity is good, canBe processed into various section bars, there is good electric conductivity, thermal conductivity and corrosion stability, industrial being widely used,Use amount is only second to steel.
As the new research direction of aluminium alloy---aluminium lithium alloy has low-density, high specific strength and ratioThe advantages such as rigidity, good cryogenic property and corrosion resistance and good superplasticity. Use aluminium lithium alloyReplace conventional aluminium alloy and can make architecture quality alleviate 10%～15%, rigidity improves 15%～20%, isA kind of desirable aerospace structure material. Owing to often adopting the shape of connector between space structure partFormula, replaces traditional riveted structure can alleviate architecture quality by welding procedure, reduces installation time,Therefore, the weldability of aluminium lithium alloy is had higher requirement.
The Reynolds metal company of the U.S. is cooperated with MartinMaritta company, exploitation WeldliteSeries aluminum lithium alloy. This series alloy has the feature of high strength weldable, and tensile strength reaches as high as 700MPa; Under multiple welding procedure, all can form fine and close weld seam, its weld strength and toughness are all obviousHigher than other conventional aluminum alloys. Weldalite alloy comprises WeldaliteTM049 and 210 two is closedGold series, wherein WeldaliteTM210 alloys have higher weldability, its chemical composition and relevantPerformance all meets the application of aerospace structure material, is universally recognized material of present stage, but byBe by adding silver (Ag) in it, improve the welding performance of material, therefore also improved aluminium lithium and closedThe corresponding cost of gold.
To sum up, not only cost is lower to need at present one, and have low each opposite sex, weldability withAnd high-intensity aluminium lithium alloy material.
Summary of the invention
The object of the invention is to, by improving design of alloy raw according to the feature optimization of alloyProduction. art, provides a kind of intensity of aluminium lithium alloy in prior art, weldability, reduction of having improved eachSynform and significantly reduce aluminium lithium alloy rod and the production method thereof of material cost.
For achieving the above object, technical scheme provided by the present invention is:
A kind of aluminium lithium alloy rod, is made up of the component of following percentage by weight: lithium 6-7.5wt%,Copper: 4-6wt%, magnesium: 0.1-0.3wt%, tin 0.4-0.8wt%, zinc: 0.2-0.4wt%, manganese 0.05-0.3Wt%, lanthanum and cerium: 0.2-0.4wt%, surplus is aluminium.
Preferably, a kind of aluminium lithium alloy rod, is made up of the component of following percentage by weight: lithium6.5-7.0wt%, copper 4.5-5.5wt%, magnesium 0.125-0.275wt%, tin 0.45-0.75wt%, zinc0.25-0.375wt%, manganese 0.1-0.25wt%, lanthanum and cerium 0.225-0.375wt%, surplus is aluminium.
Preferably, a kind of aluminium lithium alloy rod, is made up of the component of following percentage by weight: lithium 6.75wt%,Copper 5wt%, magnesium 0.2wt%, tin 0.6wt%, zinc 0.3wt%, manganese 0.175wt%, lanthanum and cerium 0.3wt%,Surplus is aluminium.
The production method of above-mentioned aluminium lithium alloy rod provided by the invention, has following steps:
1) by weight by raw material blending, melting at 750-800 DEG C, smelting time is that 1.5-2 is littleTime;
2) adopt spectra methods to detect the alloy liquid that completes of melting, determine its composition scope itIn;
3) adopt the mode of continuous casting to produce blank billet, the diameter of described blank billet is20-50mm, length is 3-4 rice;
4) Ageing Treatment, environment temperature is 200-220 DEG C, the aging anneal time is 1.5 hours;
5) the alloy bar stretch forming described annealing being completed.
Further, in step 5) in, the alloy bar that described annealing is completed is drawn into diameter and isThe finished product of 5mm-40mm.
The present invention also provides the purposes of above-mentioned aluminium lithium alloy rod in preparation space flight and aviation structural material.
Adopt technique scheme, beneficial effect of the present invention has:
1, the invention provides a kind of aluminium lithium alloy rod and production method thereof, met multiplex simultaneouslyLow-density, high specific strength and specific stiffness, cryogenic property and corrosion resistance, superplasticity, the height of way materialIntensity, weldability, low each opposite sex and cheaply multiple needs.
2, the present invention is improving the content of lithium, and adds Xi ﹑ Xin ﹑ Tong ﹑ Meng ﹑ magnesium and rare earth elementOn the basis of lanthanum and cerium, by suitable production technology, replace heat treatment repeatedly or forge to pushThe entirety that mode has realized quality of materials reduces.
3, this material, due to lower density and higher intensity, is a kind of desirable structural material,Can be widely used in the aspects such as machine-building, Transport Machinery, dynamic power machine and aircraft industry, such as aircraftInner link, the connecting rod of high speed motor car interior etc.
Detailed description of the invention
The preparation of embodiment 1 aluminium lithium alloy rod of the present invention
Batching melting: by ready material according to lithium 6wt%, copper: 6wt%, magnesium: 0.1wt%,Tin 0.4wt%, zinc: 0.2wt%, manganese 0.05wt%, lanthanum and cerium: 0.2wt%, the matter that surplus is aluminiumAmount is than putting into smelting furnace, and smelting furnace temperature is controlled at 750 DEG C, and the time is 2 hours.
Detect: adopt spectra methods to detect the alloy liquid that melting completes, determine that its composition is in scopeWithin.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current generator, realizeMicro-anti-technique that pushes away of journey of drawing, produces large volume heave hand base, mills made-up belt table through two-sided milling milling face unitSkin defect, through cold-rolling mill, cutting into diameter is 20-50mm, length is the blank billet of 3-4 rice.
Extrusion modling: ingot blank is made it to flow out from nib in recipient.
Ageing Treatment: adopt artificial aging processing, environment temperature is 200 DEG C, eliminates internal stress, timelinessAnnealing time is 1.5 hours.
Scrub aligning: scrub operation by pickling, remove remained on surface and oxide, by aligning workOrder, eliminates internal stress, and alloy bar is drawn into the finished product that diameter is 5mm-40mm.
By the aluminium lithium alloy rod and isopyknic Weldalite210 couple prepared according to the embodiment of the present inventionRatio, under 20 DEG C of extruded rod T6 states, each performance parameter is as shown in table 1:
Table 1
The preparation of embodiment 2 aluminium lithium alloy rod of the present invention
Batching melting: by ready material according to lithium 7.5wt%, copper: 5wt%, magnesium 0.2wt%,Tin 0.6wt%, zinc 0.3wt%, manganese 0.175wt%, lanthanum and cerium 0.3wt%, the quality that surplus is aluminiumThan putting into smelting furnace, smelting furnace temperature is controlled at 800 DEG C, and the time is 1.5 hours.
Detect: adopt spectra methods to detect the alloy liquid that melting completes, determine that its composition is in scopeWithin.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current generator, realizeMicro-anti-technique that pushes away of journey of drawing, produces large volume heave hand base, mills made-up belt table through two-sided milling milling face unitSkin defect, through cold-rolling mill, cutting into diameter is 20-50mm, length is the blank billet of 3-4 rice.
Extrusion modling: ingot blank is made it to flow out from nib in recipient.
Ageing Treatment: adopt artificial aging processing, environment temperature is 220 DEG C, eliminates internal stress, timelinessAnnealing time is 1.5 hours.
Scrub aligning: scrub operation by pickling, remove remained on surface and oxide, by aligning workOrder, eliminates internal stress, and alloy bar is drawn into the finished product that diameter is 5mm-40mm.
By the aluminium lithium alloy rod and isopyknic Weldalite210 couple prepared according to the embodiment of the present inventionRatio, under 20 DEG C of extruded rod T6 states, each performance parameter is as shown in table 2:
Table 2
The preparation of embodiment 3 aluminium lithium alloy rod of the present invention
Batching melting: by ready material according to lithium 6.75wt%, copper: 4.0wt%, magnesium 0.3wt%,Tin 0.8wt%, zinc 0.4wt%, manganese 0.3wt%, lanthanum and cerium 0.4wt%, the mass ratio that surplus is aluminiumPut into smelting furnace, smelting furnace temperature is controlled at 800 DEG C, and the time is 2 hours.
Detect: adopt spectra methods to detect the alloy liquid that melting completes, determine that its composition is in scopeWithin.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current generator, realizeMicro-anti-technique that pushes away of journey of drawing, produces large volume heave hand base, mills made-up belt table through two-sided milling milling face unitSkin defect, through cold-rolling mill, cutting into diameter is 20-50mm, length is the blank billet of 3-4 rice.
Extrusion modling: ingot blank is made it to flow out from nib in recipient.
Ageing Treatment: adopt artificial aging processing, environment temperature is 220 DEG C, eliminates internal stress, timelinessAnnealing time is 1.5 hours.
Scrub aligning: scrub operation by pickling, remove remained on surface and oxide, by aligning workOrder, eliminates internal stress, and alloy bar is drawn into the finished product that diameter is 5mm-40mm.
By the aluminium lithium alloy rod and isopyknic Weldalite210 couple prepared according to the embodiment of the present inventionRatio, under 20 DEG C of extruded rod T6 states, each performance parameter is as shown in table 3:
Table 3
The preparation of embodiment 4 aluminium lithium alloy rod of the present invention
Batching melting: by ready material according to lithium 6.5wt%, copper: 5.5wt%, magnesium0.125wt%, tin 0.45wt%, zinc 0.25wt%, manganese 0.25wt%, lanthanum and cerium 0.225wt%,Surplus is that the mass ratio of aluminium is put into smelting furnace, and smelting furnace temperature is controlled at 750 DEG C, and the time is 1.5Hour.
Detect: adopt spectra methods to detect the alloy liquid that melting completes, determine that its composition is in scopeWithin.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current generator, realizeMicro-anti-technique that pushes away of journey of drawing, produces large volume heave hand base, mills made-up belt table through two-sided milling milling face unitSkin defect, through cold-rolling mill, cutting into diameter is 20-50mm, length is the blank billet of 3-4 rice.
Extrusion modling: ingot blank is made it to flow out from nib in recipient.
Ageing Treatment: adopt artificial aging processing, environment temperature is 220 DEG C, eliminates internal stress, timelinessAnnealing time is 1.5 hours.
Scrub aligning: scrub operation by pickling, remove remained on surface and oxide, by aligning workOrder, eliminates internal stress, and alloy bar is drawn into the finished product that diameter is 5mm-40mm.
By the aluminium lithium alloy rod and isopyknic Weldalite210 couple prepared according to the embodiment of the present inventionRatio, under 20 DEG C of extruded rod T6 states, each performance parameter is as shown in table 4:
Table 4
The preparation of embodiment 5 aluminium lithium alloy rod of the present invention
Batching melting: by ready material according to lithium 7.0wt%, copper: 4.5wt%, magnesium0.275wt%, tin 0.75wt%, zinc 0.375wt%, manganese 0.1wt%, lanthanum and cerium 0.375wt%,Surplus is that the mass ratio of aluminium is put into smelting furnace, and smelting furnace temperature is controlled at 800 DEG C, and the time is 2 littleTime.
Detect: adopt spectra methods to detect the alloy liquid that melting completes, determine that its composition is in scopeWithin.
Casting cold cogging: adopt continuous casting mode, adopt computer control alternating current generator, realizeMicro-anti-technique that pushes away of journey of drawing, produces large volume heave hand base, mills made-up belt table through two-sided milling milling face unitSkin defect, through cold-rolling mill, cutting into diameter is 20-50mm, length is the blank billet of 3-4 rice.
Extrusion modling: ingot blank is made it to flow out from nib in recipient.
Ageing Treatment: adopt artificial aging processing, environment temperature is 200 DEG C, eliminates internal stress, timelinessAnnealing time is 1.5 hours.
Scrub aligning: scrub operation by pickling, remove remained on surface and oxide, by aligning workOrder, eliminates internal stress, and alloy bar is drawn into the finished product that diameter is 5mm-40mm.
By the aluminium lithium alloy rod and isopyknic Weldalite210 couple prepared according to the embodiment of the present inventionRatio, under 20 DEG C of extruded rod T6 states, each performance parameter 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 detailedCarefully, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention. It is right to it should be pointed out thatIn those of ordinary skill in the art, without departing from the inventive concept of the premise, can also doGo out some distortion and improvement, these all belong to protection scope of the present invention.
Claims (9)
1. an aluminium lithium alloy rod, is characterized in that, is made up of: lithium the component of following percentage by weight6.75wt%, copper 5wt%, magnesium 0.2wt%, tin 0.6wt%, zinc 0.3wt%, manganese 0.175wt%,Lanthanum and cerium 0.3wt%, surplus is aluminium.
2. an aluminium lithium alloy rod, is characterized in that, is made up of: lithium the component of following percentage by weight6wt%, copper 6wt%, magnesium 0.1wt%, tin 0.4wt%, zinc 0.2wt%, manganese 0.05wt%, lanthanumWith cerium 0.2wt%, surplus is aluminium.
3. an aluminium lithium alloy rod, is characterized in that, is made up of: lithium the component of following percentage by weight7.5wt%, copper 5wt%, magnesium 0.2wt%, tin 0.6wt%, zinc 0.3wt%, manganese 0.175wt%,Lanthanum and cerium 0.3wt%, surplus is aluminium.
4. an aluminium lithium alloy rod, is characterized in that, is made up of: lithium the component of following percentage by weight6.75wt%, copper 4.0wt%, magnesium 0.3wt%, tin 0.8wt%, zinc 0.4wt%, manganese 0.3wt%,Lanthanum and cerium 0.4wt%, surplus is aluminium.
5. an aluminium lithium alloy rod, is characterized in that, is made up of: lithium the component of following percentage by weight6.5wt%, copper 5.5wt%, magnesium 0.125wt%, tin 0.45wt%, zinc 0.25wt%, manganese 0.25wt%,Lanthanum and cerium 0.225wt%, surplus is aluminium.
6. an aluminium lithium alloy rod, is characterized in that, is made up of: lithium the component of following percentage by weight7.0wt%, copper 4.5wt%, magnesium 0.275wt%, tin 0.75wt%, zinc 0.375wt%, manganese 0.1wt%,Lanthanum and cerium 0.375wt%, surplus is aluminium.
7. according to the aluminium lithium alloy rod production method of claim 1-6 any one, it is characterized in that toolThere are following steps:
1) by arbitrary described weight ratio in claim 1-6 by raw material blending, at 750-800 DEG CMelting, smelting time is 1.5-2 hour;
2) adopt spectra methods to detect the alloy liquid that completes of melting, determine its composition scope itIn;
3) adopt the mode of continuous casting to produce blank billet, the diameter of described blank billet is20-50mm, length is 3-4 rice;
4) Ageing Treatment, environment temperature is 200-220 DEG C, the aging anneal time is 1.5 hours;
5) the alloy bar stretch forming described annealing being completed.
8. the production method of aluminium lithium alloy rod according to claim 7, is characterized in that:
In step 5) in, the alloy bar that described annealing is completed is drawn into the finished product that diameter is 5mm-40mm.
9. preparing space flight and aviation structure according to the described aluminium lithium alloy rod of claim 1-6 any onePurposes in material.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB597113A (en) * | 1945-08-10 | 1948-01-19 | Rupert Martin Bradbury | A bearing alloy |
| CN1083869A (en) * | 1992-09-09 | 1994-03-16 | 中国科学院金属研究所 | The Al-Li-Cu-Mg-Zr group alloy and the preparation method that contain yttrium |
| CN101838764A (en) * | 2010-03-29 | 2010-09-22 | 江苏大学 | Scandium and strontium compound microalloyed high zinc 2099 type aluminium alloy and preparation method thereof |
| 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 |
| CN101967588A (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 | Damage-resistant aluminum-lithium alloy and preparation method thereof |
| CN102834502A (en) * | 2010-04-12 | 2012-12-19 | 美铝公司 | 2xxx series aluminum lithium alloys having low strength differential |
| CN103492596A (en) * | 2011-02-17 | 2014-01-01 | 美铝公司 | 2xxx series aluminum lithium alloys |
-
2014
- 2014-06-13 CN CN201410261998.0A patent/CN103993204B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB597113A (en) * | 1945-08-10 | 1948-01-19 | Rupert Martin Bradbury | A bearing alloy |
| CN1083869A (en) * | 1992-09-09 | 1994-03-16 | 中国科学院金属研究所 | The Al-Li-Cu-Mg-Zr group alloy and the preparation method that contain yttrium |
| CN101838764A (en) * | 2010-03-29 | 2010-09-22 | 江苏大学 | Scandium and strontium compound microalloyed high zinc 2099 type aluminium alloy and preparation method thereof |
| CN102834502A (en) * | 2010-04-12 | 2012-12-19 | 美铝公司 | 2xxx series aluminum lithium alloys having low strength differential |
| 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 |
| CN101967588A (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 | Damage-resistant 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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Address after: 215412 Building 11, No. 88, Zhenghe Middle Road, Ludu Town, Taicang City, Suzhou, Jiangsu Province Patentee after: Suzhou Boyuan Aerospace New Materials Co.,Ltd. Address before: 215412 Building 11, No. 88, Zhenghe Middle Road, Ludu Town, Taicang City, Suzhou, Jiangsu Province Patentee before: SUZHOU RICHMOND ADVANCED MATERIAL TECHNOLOGY TRANSFER Co.,Ltd. |