CN102145441A - SAL8090 aluminum-lithium alloy TIG (Tungsten Inert Gas)/MIG (Metal-Inert Gas) solder wire and preparation method thereof - Google Patents
SAL8090 aluminum-lithium alloy TIG (Tungsten Inert Gas)/MIG (Metal-Inert Gas) solder wire and preparation method thereof Download PDFInfo
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- CN102145441A CN102145441A CN 201110096717 CN201110096717A CN102145441A CN 102145441 A CN102145441 A CN 102145441A CN 201110096717 CN201110096717 CN 201110096717 CN 201110096717 A CN201110096717 A CN 201110096717A CN 102145441 A CN102145441 A CN 102145441A
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Abstract
The invention discloses an SAL8090 aluminum-lithium alloy TIG (Tungsten Inert Gas)/MIG (Metal-Inert Gas) solder wire and a preparation method thereof. Raw materials used in preparation comprise the following components in percentage by weight: 2.5-3.5% of Li, 0.5-1.5% of Mg, 1.0-2.0% of Cu, 0.1-0.25% of Zr, 0.1-0.2% of Sr and the balance of Al. The preparation method of the SAL8090 aluminum-lithium alloy TIG/MIG solder wire comprises the following steps of: a. smelting the mixed raw materials in a vacuum induction furnace, and then casting under the protection of argon gas; b. continuously squeezing to prepare an alloy steel wire rod; and c. carrying out rough, moderate and fine wire drawing operation on the alloy steel wire rod, and then scraping and cleaning to obtain the solder wire. The aluminum-lithium alloy TIG/MIG solder wire prepared by using the method disclosed by the invention has low burning rate and good mechanical property and is not easy to fracture.
Description
Technical field
The present invention relates to a kind of novel aluminum-lithium alloy welding wire and preparation method thereof, belong to nonferrous materials preparation, processing and forming field in the metal material kind in the new material scope.
Background technology
Lithium is the lightest metal of nature, and density is 0.534g/cm3, and fusing point is 186 ℃, adds the metallic element lithium in the aluminium, when reducing total density, can increase substantially the elastic modelling quantity of alloy. Studies show that every interpolation mass fraction is 1% lithium in aluminium alloy, can reduce density metal 3%, improve elastic modelling quantity 6%. Replace conventional aluminium alloy with aluminium lithium alloy, can make Structure weight reduce 10%～20%, rigidity improves 15%～20%. Therefore, the aluminium lithium alloy that has low-density, high elastic modulus, high specific strength and a high specific stiffness performance has broad application prospects at aerospace field.
In the aerospace flight vehicle fuel tank, whenever alleviate the payload that 1kg weight just increases 1kg, can bring about 100000 dollars economic benefit and increase the 1kg payload. Therefore, in the Design and manufacture of following course of new aircraft, will more adopt aluminium lithium alloy to make fuel tank and carry out loss of weight. The consumption of corresponding various aluminum-lithium alloy welding wires is with increasing.
At present, existing more than the 20 kind of ingot casting production of external aluminium lithium alloy reaches industrialized level, and the states such as America and Europe can produce the ingot casting of 6～10t, and Russia has possessed the ingot casting ability of producing 25t. The aluminium lithium alloy annual production of U.S. Alcoa company has surpassed 3600t, can expand rapidly 9000t to as required. The aluminium lithium alloy factory annual production that Britain Alcan company and French Pechiney company unite construction can reach 10000t, and state's aluminium lithium alloys such as the United States, Russia, Europe are rolling, extruding and the technology of forging have reached conventional aluminium alloy level. In recent years, implementing low-cost emitter, ultralight fuel tank plan and reusable spacecraft core in the works, strengthen the research of aluminium lithium alloy abroad, promoted developing rapidly of aluminium lithium alloy. Aluminium lithium alloy has used for many years remarkable benefit on the opportunities of combat such as U.S. F15B, Russia's rice lattice 29, Soviet Union 27, Britain EAP. The U.S. " Discovery " space shuttle fuel tank uses the Welding Structure of 2195 aluminium lithium alloys, makes whole fuel tank loss of weight 3300kg. The U.S. " Endeavour " space shuttle fuel tank has adopted the Weldalite049 aluminium lithium alloy to replace 2219 alloys, makes the carrying capacity of space shuttle improve 3400 kg. Rocket propellent tank is a pressure-bearing welded vessel, is welded by metal shell, and aluminium lithium alloy is the preferred material of this tank. Adopt welding method to replace clinching method in the eighties abroad, obtained good loss of weight benefit. The aluminum-lithium alloy welding wire of development has reached higher level.
It is the research of alloy that China has begun Al-Cu-Li from the end of the sixties, but real research climax begins after aluminium lithium alloy is put into the Seventh Five-Year Plan Program for Tackling Key Problems as state key project financing, existing tens of the institutions of higher education in the whole nation, scientific research institutions and factory participate in so far, research contents is also rather comprehensive, from the theory to reality, from founding, alloying, be heat-treated to structure property, all-embracing, especially space flight 510 research institutes in 1998 utilize the microgravity electromagnetic analogue successfully to prepare to contain the lithium amount up to 5%～10% binary aluminium lithium alloy small sample, and the manufacturing technology of aluminium lithium alloy is further developed.
China has adopted the riveted structure part of aluminium lithium alloy in certain novel aerospace craft design, but riveted joint generally connects the low equipment of some seal requests, and welding can be processed the higher equipment of sealing requirements, therefore, might in making, adopt in a large number by following aerospace craft the welding structural elements of aluminium lithium alloys, the consumption of aluminum-lithium alloy welding wire will grow steadily, but the aluminum-lithium alloy welding wire of China not yet forms mass production capabilities at present, and level still is in the experimental study stage of plugging a gap.
Aluminium lithium alloy adopts TIG weldering (Tangstent inert gas; gas tungsten arc welding) or MIG weldering (Metal inert-gas welding melting pole gas shielded arc welding); the loss of weight benefit of material itself is about 12%; replace riveted joint with welding, saving connection securing member and O-ring seal loss of weight benefit has again 12%.
But traditional SAL8090 aluminium lithium alloy TIG/MIG welding wire lithium in preparation process is oxidized easily, the burn out rate of lithium is high, aluminum-lithium alloy welding wire wire rod rough surface, cut are dark, and squeezed joint intensity is low, easy fracture during wire drawing, production efficiency is low, and environmental pollution is serious, and prepared welding wire mechanical property is bad.
Summary of the invention
The present invention is intended to overcome the deficiency that above prior art exists, and provides a kind of mechanical property good SAL8090 aluminium lithium alloy TIG/MIG solder wire formula system, to satisfy 8090 aluminium lithium alloys to the demand of welding procedure.
Another object of the present invention provide a kind of in preparation process the burn out rate of lithium low, reduce the method for preparing SAL8090 aluminium lithium alloy TIG/MIG welding wire of environmental pollution.
Technical solution problem of the present invention adopts following technical scheme:
A kind of SAL8090 aluminium lithium alloy TIG/MIG welding wire, described welding wire adopts the Al-Li-Mg-Cu-Zr-Sr alloy system, the weight percentage of each component is: Li 2.5～3.5%, Mg 0.5～1.5%, Cu 1.0～2.0%, Zr 0.1～0.25%, Sr 0.1～0.2%, all the other are Al.
The preparation method of SAL8090 aluminium lithium alloy TIG/MIG welding wire of the present invention, carry out according to the following steps:
A, the Li with proportional quantity, Mg, Cu, Zr, Sr and Al adopt vaccum sensitive stove to carry out melting, and smelting temperature is 630 ℃～660 ℃, purifying vacuum 1 * 10－3Pa～2×10
－3Pa, the ingot casting of under the protection of argon gas, casting to get after the melting, argon flow amount is 8～10ml ∕ s;
Under 500～550 ℃ of temperature, carry out the continuously extruded alloy wire rod that makes behind the foreign material at b, removal ingot casting surface and two;
C, with the alloy wire rod through thick, in, behind the finish draw silk, carry out again the scraping cleaning treatment and namely get described welding wire.
Further, the purifying vacuum that adopts among the step a is 1.35 * 10－3Best results during Pa.
Further, scraping is cleaned and is adopted rotary delthyrium scraper among the step c.
Beneficial effect of the present invention is embodied in the following aspects:
1, adopt vacuum melting Argon casting process to prepare the aluminium lithium alloy ingot casting, the easy oxidized problem of lithium in the alloy when having solved ingot casting, the burn out rate of lithium can be controlled in 3%.
2, adopt the thermosol continuous extruding technology to prepare the aluminium lithium alloy wire rod. Former technique is cold extrusion, new technology is for when extruding is preheated to 500～550 ℃ to the aluminium lithium alloy ingot, solved aluminum-lithium alloy welding wire wire rod rough surface when originally colding pressing, cut is dark, and the low problem of squeezed joint intensity, so that when the subsequent handling wire drawing easy fracture not, improved production efficiency.
3, adopt the scraping cleaning to prepare aluminum-lithium alloy welding wire. Adopt strong acid (nitric acid+sulfuric acid+phosphoric acid) to be heated to 120 ℃ when former technique is wire drawing and clean the welding wire surface oxide, and new technology adopts when being wire drawing rotary delthyrium scraper to carry out scraping to clean the problem of environmental pollution of having avoided the traditional chemical cleaning to bring.
4, the mechanical property of SAL8090 aluminium lithium alloy TIG/MIG welding wire of the prior art is generally: tensile strength sigma ь is 380MP а, and yield strength σ 0.2 is for 300MP а, joint percentage elongation δ are 5%, angle of bend а is 8 °, strength factorη is 60%.And SAL8090 aluminium lithium alloy TIG/MIG welding wire of the present invention adds the rare earth element Sr of trace in raw material, reached the dispersion-strengtherning lattice structure, improved the eutectic distributional pattern, the purpose of strengthen welds solidified structure, mechanical property has greatly improved, tensile strength sigma ь is 440～500MP а, and yield strength σ 0.2 is that 350～400MP а, joint percentage elongation δ are 5～6%, angle of bend а is 9～11 °, strength factorη is 65～80
%。
The specific embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
Embodiment 1
A kind of SAL8090 aluminium lithium alloy TIG/MIG welding wire, described welding wire adopts the Al-Li-Mg-Cu-Zr-Sr alloy system, and the weight percentage of each component is during manufacturing: Li 2.58%, Mg 1.07%, Cu 1.1%, Zr 0.11%, Sr 0.15%, all the other are Al.
Method preparation according to the following steps:
A, the Li with proportional quantity, Mg, Cu, Zr, Sr and Al adopt vaccum sensitive stove to carry out melting, and smelting temperature is 650 ℃, and vacuum is 1.35 * 10－3Pa, the ingot casting of under the protection of argon gas, casting to get after the melting, argon flow amount is 8ml ∕ s;
Under 500 ℃ of temperature, carry out the continuously extruded alloy wire rod that makes behind the foreign material at b, removal ingot casting surface and two;
C, with the alloy wire rod through thick, in, behind the finish draw silk, carry out the scraping cleaning treatment with rotary delthyrium scraper and namely get described welding wire.
Embodiment 2
A kind of SAL8090 aluminium lithium alloy TIG/MIG welding wire, described welding wire adopts the Al-Li-Mg-Cu-Zr-Sr alloy system, and the weight percentage of each component is during manufacturing: Li 2.5%, Mg 1.5%, Cu 2.0%, Zr 0.1%, Sr 0.2%, all the other are Al.
Press embodiment 1 described method preparation, wherein smelting temperature is 630 ℃, and vacuum is 1 * 10－3Pa, argon flow amount are 10ml ∕ s, carry out continuously extruded under 525 ℃ of temperature.
Embodiment 3
A kind of SAL8090 aluminium lithium alloy TIG/MIG welding wire, described welding wire adopts the Al-Li-Mg-Cu-Zr-Sr alloy system, and the weight percentage of each component is during manufacturing: Li 3.5%, Mg 0.5%, Cu 1.0%, Zr 0.25%, Sr 0.1%, all the other are Al.
Press embodiment 1 described method preparation, wherein smelting temperature is 660 ℃, and vacuum is 2 * 10－3Pa, argon flow amount are 9ml ∕ s, carry out continuously extruded under 550 ℃ of temperature.
Embodiment 4
A kind of SAL8090 aluminium lithium alloy TIG/MIG welding wire, described welding wire adopts the Al-Li-Mg-Cu-Zr-Sr alloy system, and the weight percentage of each component is during manufacturing: Li 3.2%, Mg 0.8%, Cu 1.8%, Zr 0.2%, Sr 0.17%, all the other are Al.
Press embodiment 3 described method preparations.
The welding joint mechanical property data of various embodiments of the present invention gained welding wire see Table 1.
Table 1
| Tensile strength (σ ь/MP а) | Yield strength (σ 0.2/ MP а) | The joint percentage elongation (δ/%) | Angle of bend (а/(°)) | Strength factor (η/%） | |
| Batten 1 | 482.3 | 390.4 | 5.5 | 11 | 75 |
| Batten 2 | 487.6 | 388.2 | 6.0 | 10 | 81 |
| Batten 3 | 463.8 | 374.1 | 5.8 | 9.5 | 70 |
| Batten 4 | 441.4 | 357.9 | 5.3 | 9 | 66 |
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement. Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1.SAL8090 aluminium lithium alloy TIG/MIG welding wire, it is characterized in that, employed raw material comprises each component of following percetage by weight: Li 2.5～3.5%, Mg 0.5～1.5%, Cu 1.0～2.0%, Zr 0.1～0.25%, Sr 0.1～0.2% during manufacturing, and all the other are Al.
2. the preparation method of SAL8090 aluminium lithium alloy TIG/MIG welding wire claimed in claim 1 is characterized in that, carries out according to the following steps:
A, the Li with proportional quantity, Mg, Cu, Zr, Sr and Al adopt vaccum sensitive stove to carry out melting, and smelting temperature is 630 ℃～660 ℃, purifying vacuum 1 * 10－3Pa～2×10
－3Pa, the ingot casting of under the protection of argon gas, casting to get after the melting, argon flow amount is 8～10ml ∕ s;
Under 500～550 ℃ of temperature, carry out the continuously extruded alloy wire rod that makes behind the foreign material at b, removal ingot casting surface and two;
C, with the alloy wire rod through thick, in, behind the finish draw silk, carry out again the scraping cleaning treatment and namely get described welding wire.
3. the preparation method of SAL8090 aluminium lithium alloy TIG/MIG welding wire according to claim 2, it is characterized in that: the purifying vacuum that adopts among the step a is 1.35 * 10－3Pa。
4. the preparation method of SAL8090 aluminium lithium alloy TIG/MIG welding wire according to claim 3 is characterized in that: the rotary delthyrium scraper of scraping cleaning employing among the step c.
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|---|---|---|---|
| CN201110096717A CN102145441B (en) | 2011-04-18 | 2011-04-18 | SAL8090 aluminum-lithium alloy TIG (Tungsten Inert Gas)/MIG (Metal-Inert Gas) solder wire and preparation method thereof |
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| CN201110096717A CN102145441B (en) | 2011-04-18 | 2011-04-18 | SAL8090 aluminum-lithium alloy TIG (Tungsten Inert Gas)/MIG (Metal-Inert Gas) solder wire and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689924A (en) * | 2016-04-12 | 2016-06-22 | 兰州威特焊材科技股份有限公司 | Preparation method of high-purity CRRCSAL5356G aluminum magnesium alloy TIG/MIG welding wire for high-speed rail train |
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| CN1117903A (en) * | 1994-08-30 | 1996-03-06 | 天津大学 | Low alloy steel high-toughness self-shielded flux-cored welding stick |
| JPH08252689A (en) * | 1995-03-14 | 1996-10-01 | Alithium:Kk | Aluminum-lithium alloy filler metal |
| US20030145912A1 (en) * | 1998-02-20 | 2003-08-07 | Haszler Alfred Johann Peter | Formable, high strength aluminium-magnesium alloy material for application in welded structures |
| CN1785580A (en) * | 2004-12-08 | 2006-06-14 | 中国科学院金属研究所 | High strength low heat cracking aluminium copper serial alloy welding wire, its preparation method and application |
| CN1954959A (en) * | 2006-09-14 | 2007-05-02 | 中国航空工业第一集团公司北京航空材料研究院 | Al-Mg-Sc series solder wire |
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2011
- 2011-04-18 CN CN201110096717A patent/CN102145441B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1117903A (en) * | 1994-08-30 | 1996-03-06 | 天津大学 | Low alloy steel high-toughness self-shielded flux-cored welding stick |
| JPH08252689A (en) * | 1995-03-14 | 1996-10-01 | Alithium:Kk | Aluminum-lithium alloy filler metal |
| US20030145912A1 (en) * | 1998-02-20 | 2003-08-07 | Haszler Alfred Johann Peter | Formable, high strength aluminium-magnesium alloy material for application in welded structures |
| CN1785580A (en) * | 2004-12-08 | 2006-06-14 | 中国科学院金属研究所 | High strength low heat cracking aluminium copper serial alloy welding wire, its preparation method and application |
| CN1954959A (en) * | 2006-09-14 | 2007-05-02 | 中国航空工业第一集团公司北京航空材料研究院 | Al-Mg-Sc series solder wire |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689924A (en) * | 2016-04-12 | 2016-06-22 | 兰州威特焊材科技股份有限公司 | Preparation method of high-purity CRRCSAL5356G aluminum magnesium alloy TIG/MIG welding wire for high-speed rail train |
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Address after: 730070, No. 348, Xin Wan Road, Anning District, Gansu, Lanzhou Patentee after: LANZHOU WEITE WELDING MATERIAL TECHNOLOGY CO., LTD. Address before: 730070, No. 348, Xin Wan Road, Anning District, Gansu, Lanzhou Patentee before: Lanzhou Weite Welding Material Furance Burden Co., Ltd. |