CN111363961A - Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy - Google Patents

Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy Download PDF

Info

Publication number
CN111363961A
CN111363961A CN202010352997.2A CN202010352997A CN111363961A CN 111363961 A CN111363961 A CN 111363961A CN 202010352997 A CN202010352997 A CN 202010352997A CN 111363961 A CN111363961 A CN 111363961A
Authority
CN
China
Prior art keywords
percent
equal
less
lithium alloy
aluminum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010352997.2A
Other languages
Chinese (zh)
Inventor
王海军
张帅
万东海
洪大军
张自生
曹俊生
石建平
汪洪宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou Aerospace Xinli Casting and Forging Co Ltd
Original Assignee
Guizhou Aerospace Xinli Casting and Forging Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guizhou Aerospace Xinli Casting and Forging Co Ltd filed Critical Guizhou Aerospace Xinli Casting and Forging Co Ltd
Priority to CN202010352997.2A priority Critical patent/CN111363961A/en
Publication of CN111363961A publication Critical patent/CN111363961A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)

Abstract

The Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy comprises the following elements in percentage by mass: 1.5% -3.0%, Cu: 2.0% -3.5%, Mg: 0.35-0.85%, Zn: 0.10-0.40%, Zr: 0.05-0.20%, Er: 0.05 to 0.50 percent of Mn, less than or equal to 0.50 percent of Ti, less than or equal to 0.15 percent of Cr and less than or equal to 0.10 percent of Cr; the total content of impurity elements is less than or equal to 0.15 percent; the balance being Al. The invention obtains better weight reduction effect by increasing the content of Li element and increases the main strengthening phase delta' (Al) in the aluminum-lithium alloy3Li) and T1（Al2CuLi) is precipitated in the aging process, the alloy strength can be greatly improved, and the rare earth element Er is added, so that the material purity can be improved by an essence solution in the smelting stage, the crystal grains of an as-cast structure can be refined, and the alloy toughness can be improved.

Description

Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy
Technical Field
The invention belongs to the technical field of metal materials, and particularly relates to a novel Er-containing high-Li-content light-weight, low-cost and high-toughness aluminum-lithium alloy.
Technical Field
The weight reduction urgency in the field of aerospace currently reaches 'gram is relatively', and research and attempt are continuously made from structural design weight reduction to raw material replacement weight reduction, so that light materials such as composite materials, magnesium alloys and aluminum alloys are continuously competitive and mutually replaced in the development of new-generation aerospace aircrafts. After Li is added into the aluminum alloy, the aluminum-lithium alloy is formed, and the density of the alloy can be reduced by 3% and the elastic modulus can be improved by 6% when 1% of Li is added. The aluminum-lithium alloy has lower density, higher corrosion resistance and fatigue resistance compared with the conventional 2-series/7-series high-strength aluminum alloy, better aerodynamic performance, stronger corrosion resistance, lower cost compared with a composite material, higher corrosion resistance, lower inflammability and better forming performance compared with a magnesium alloy, is globally accepted as one of the most ideal light structural materials in the aerospace field, and has huge application prospect in the fields of pursuing light weight, such as high-speed rails, ships and the like.
The aluminum lithium alloy has undergone 3 stages in foreign research and development, and the first generation and the second generation aluminum lithium alloys are not used in large scale due to the problems of poor plastic toughness, obvious anisotropy and the like caused by high Li content, so that the third generation aluminum lithium alloy reduces the Li element to below 1.8 percent and increases high-cost elements such as Ag, Sc and the like for strengthening and toughening, so that the aluminum lithium alloy has good performances of high strength, high toughness and weldability. At present, more than 20 aluminum lithium alloys in the third generation have been produced and applied in a large scale, and gradually replace the traditional 2-series/7-series high-strength aluminum alloys, including 2195, 2197, 2198, Russia 1460 and the like of Weldalite049 series in the United states, and are widely used in fuselage skins, frames, lower belly armor plates, floor beams and the like of military aircrafts and civil airliners, and fuel tanks, load cabin shells and the like of aerospace aircrafts. In order to meet the new requirements of the aerospace industry, enterprises and scientific research institutes such as the United states, European Union, Russia and the like have started to develop fourth-generation aluminum-lithium alloys with lighter weight, higher strength and lower cost.
Disclosure of Invention
Aiming at the technical background, the invention aims to provide a novel aluminum-lithium alloy which has the characteristics of light weight, low cost, high strength and high toughness by adding a rare earth element Er with lower cost, increasing a weight-reducing element Li and regulating the proportion of alloy elements of Cu, Mg and Zn.
The invention is realized by the following technical scheme:
a light, low-cost and high-toughness aluminum lithium alloy containing Er and high Li is characterized in that: the aluminum lithium alloy comprises the following elements in percentage by mass:
Li：1.5％～3.0％;
Cu：2.0％～3.5％;
Mg：0.35％～0.85％;
Zn：0.10％～0.40％;
Zr：0.05％～0.20％;
Er：0.05％～0.50％;
Mn≤0.50％;
Ti≤0.15％;
Cr≤0.10％；
the total content of impurity elements is less than or equal to 0.15 percent; the balance being Al.
The mass fraction of the impurity elements is less than or equal to 0.0001 percent, less than or equal to 0.0003 percent of Na + K + Ca, less than or equal to 0.05 percent of Si, less than or equal to 0.08 percent of Fe, less than or equal to 0.05 percent of other impurities individually, and less than or equal to 0.10 percent of the total amount of other impurities.
The density of the aluminum-lithium alloy is less than or equal to 2.6 g/cm3Tensile Strength σbGreater than or equal to 590MPa, yield strength sigma0.2460MPa or more, 8 percent or more of elongation delta and 70GPa or more of elastic modulus E.
Adopt above-mentioned technical scheme's beneficial effect:
the invention obtains better weight reduction effect than the third generation aluminum lithium alloy (Li is less than or equal to 1.8%) widely applied at present by improving the content of Li element, and increases the main strengthening phase delta' (Al) in the aluminum lithium alloy3Li) andT1（Al2the addition of rare earth element Er can improve the purity of the material by the essence solution in the smelting stage, refine the crystal grains of the as-cast structure and increase the toughness of the alloy on the one hand; on the other hand, the precipitation of a fine strengthening phase delta' (Al) is promoted3Li) and T1（Al2CuLi) and a small amount of Al3Er improves the strength of an alloy matrix and refines crystal grains, can simultaneously improve the strength and toughness of the material, and has strengthening and toughening effects comparable to high-cost rare earth element Sc; in addition, rare earth element Er with lower cost is adopted to replace high-cost alloy element Sc or Ag commonly added in the current third-generation high-strength high-toughness aluminum-lithium alloy, so that the aluminum-lithium alloy material can obtain better economic benefit. Therefore, the invention has great research and development application prospect in the aspect of industrialized mass manufacturing of lightweight structural parts in the fields of aerospace and the like.
Drawings
FIG. 1 is an ingot casting of a novel aluminum-lithium alloy with light weight, high strength and high toughness, which is implemented by the invention.
FIG. 2 is a metallographic photograph of a novel light-weight, high-strength and high-toughness aluminum lithium alloy ingot cast by the invention.
Detailed Description
The present invention will be described in further detail with reference to examples.
The first embodiment is as follows:
a light, low-cost, high-toughness and high-strength aluminum-lithium alloy containing Er and Li comprises the following elements in percentage by mass:
li: 2.8%, Cu: 3.3%, Mg: 0.65%, Zn: 0.35%, Zr: 0.15%, Er: 0.15%, Mn: 0.15%, Ti: 0.11%, Cr: 0.03 percent; the balance being Al. Forging and heat treatment after smelting preparation, and then sampling to detect the density and tensile mechanical property. The density of the aluminum lithium alloy of the embodiment is tested to be 2.51g/cm3Tensile Strength σbReach 628MPa and yield strength sigma0.2492MPa, and the elongation delta is 9.5 percent, thereby achieving the effects of light weight, high strength and high toughness.
Example two:
a light, low-cost, high-toughness and high-strength aluminum-lithium alloy containing Er and Li comprises the following elements in percentage by mass:
li: 2.1%, Cu: 3.0%, Mg: 0.52%, Zn: 0.35%, Zr: 0.11%, Er: 0.13%, Mn: 0.15%, Ti: 0.10%, Cr: 0.03 percent; the balance of Al; sampling after smelting preparation to detect the density and the tensile mechanical property. The density of the aluminum lithium alloy of the embodiment is 2.59g/cm3Tensile Strength σbReaches 602MPa and yield strength sigma0.2470MPa and elongation delta of 11.0 percent, and achieves the effects of light weight, high strength and high toughness.
According to the invention, a rare earth element Er with low cost is added, the weight loss element Li is increased, and the proportion of alloy elements such as Cu, Mg, Zn and the like is regulated, so that the density of the alloy elements is less than or equal to 2.6 g/cm3(lighter than most of the third generation Al-Li alloys), tensile strength sigmabGreater than or equal to 590MPa, yield strength sigma0.2The novel light, low-cost and high-toughness aluminum-lithium alloy with the elongation delta larger than or equal to 460MPa, the elongation delta larger than or equal to 8 percent and the elastic modulus E larger than or equal to 70GPa has huge application prospect in the industrialized mass manufacturing of lightweight structural parts in the fields of aerospace, aviation and the like.

Claims (3)

1. A light, low-cost and high-toughness aluminum lithium alloy containing Er and high Li is characterized in that: the aluminum lithium alloy comprises the following elements in percentage by mass:
Li：1.5％～3.0％;
Cu：2.0％～3.5％;
Mg：0.35％～0.85％;
Zn：0.10％～0.40％;
Zr：0.05％～0.20％;
Er：0.05％～0.50％;
Mn≤0.50％;
Ti≤0.15％;
Cr≤0.10％；
the total content of impurity elements is less than or equal to 0.15 percent; the balance being Al.
2. The aluminum-lithium alloy of claim 1, wherein: the mass fraction of the impurity elements is less than or equal to 0.0001 percent, less than or equal to 0.0003 percent of Na + K + Ca, less than or equal to 0.05 percent of Si, less than or equal to 0.08 percent of Fe, less than or equal to 0.05 percent of other impurities individually, and less than or equal to 0.10 percent of the total amount of other impurities.
3. The aluminum-lithium alloy of claim 1, wherein: the density of the aluminum-lithium alloy is less than or equal to 2.6 g/cm3Tensile Strength σbGreater than or equal to 590MPa, yield strength sigma0.2460MPa or more, 8 percent or more of elongation delta and 70GPa or more of elastic modulus E.
CN202010352997.2A 2020-04-29 2020-04-29 Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy Pending CN111363961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010352997.2A CN111363961A (en) 2020-04-29 2020-04-29 Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010352997.2A CN111363961A (en) 2020-04-29 2020-04-29 Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy

Publications (1)

Publication Number Publication Date
CN111363961A true CN111363961A (en) 2020-07-03

Family

ID=71207579

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010352997.2A Pending CN111363961A (en) 2020-04-29 2020-04-29 Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy

Country Status (1)

Country Link
CN (1) CN111363961A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112538600A (en) * 2020-11-10 2021-03-23 中国航发北京航空材料研究院 Forming method of aluminum-lithium alloy complex component
CN114058912A (en) * 2022-01-17 2022-02-18 北京理工大学 High-specific-strength and specific-stiffness aluminum-lithium alloy thick-wall annular piece and preparation method thereof
CN114480922A (en) * 2022-01-25 2022-05-13 郑州轻研合金科技有限公司 Ultra-light aluminum-lithium alloy and preparation method and application thereof
CN114540679A (en) * 2022-04-26 2022-05-27 北京理工大学 Trace element composite reinforced high-strength aluminum-lithium alloy and preparation method thereof
CN114574739A (en) * 2022-03-11 2022-06-03 贵州航天新力科技有限公司 3D printing aluminum-lithium alloy and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112239A2 (en) * 2008-04-18 2009-10-28 United Technologies Corporation High strength aluminium alloys with L12 precipitates
CN109666829A (en) * 2019-01-30 2019-04-23 中南大学 A kind of high-strength casting aluminium lithium ormolu of low lithium content and preparation method thereof
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
CN110592504A (en) * 2018-06-12 2019-12-20 中国航发北京航空材料研究院 Heat treatment method for improving comprehensive performance of alloy plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112239A2 (en) * 2008-04-18 2009-10-28 United Technologies Corporation High strength aluminium alloys with L12 precipitates
CN110592504A (en) * 2018-06-12 2019-12-20 中国航发北京航空材料研究院 Heat treatment method for improving comprehensive performance of alloy plate
CN109666829A (en) * 2019-01-30 2019-04-23 中南大学 A kind of high-strength casting aluminium lithium ormolu of low lithium content and preparation method thereof
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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112538600A (en) * 2020-11-10 2021-03-23 中国航发北京航空材料研究院 Forming method of aluminum-lithium alloy complex component
CN114058912A (en) * 2022-01-17 2022-02-18 北京理工大学 High-specific-strength and specific-stiffness aluminum-lithium alloy thick-wall annular piece and preparation method thereof
CN114058912B (en) * 2022-01-17 2022-04-08 北京理工大学 High-specific-strength and specific-stiffness aluminum-lithium alloy thick-wall annular piece and preparation method thereof
CN114480922A (en) * 2022-01-25 2022-05-13 郑州轻研合金科技有限公司 Ultra-light aluminum-lithium alloy and preparation method and application thereof
CN114574739A (en) * 2022-03-11 2022-06-03 贵州航天新力科技有限公司 3D printing aluminum-lithium alloy and application thereof
CN114574739B (en) * 2022-03-11 2022-11-22 贵州航天新力科技有限公司 3D printing aluminum-lithium alloy and application thereof
CN114540679A (en) * 2022-04-26 2022-05-27 北京理工大学 Trace element composite reinforced high-strength aluminum-lithium alloy and preparation method thereof
CN114540679B (en) * 2022-04-26 2022-08-02 北京理工大学 Trace element composite reinforced high-strength aluminum-lithium alloy and preparation method thereof

Similar Documents

Publication Publication Date Title
CN111363961A (en) Er-containing high-Li-content light low-cost high-toughness aluminum lithium alloy
WO2021008428A1 (en) Ultrahigh-strength aluminum-lithium alloy and preparation method therefor
CN110331319B (en) High-strength and high-plasticity corrosion-resistant aluminum alloy containing scandium and erbium and preparation method thereof
CN103498085A (en) Low-density Al-Zn-Mg alloy
CN110079711B (en) Heat-resistant high-pressure cast Al-Si-Ni-Cu aluminum alloy and preparation method thereof
CN110129629B (en) Heat-resistant cast Al-Si-Ni-Cu aluminum alloy and gravity casting preparation
US5630889A (en) Vanadium-free aluminum alloy suitable for extruded aerospace products
US5879475A (en) Vanadium-free, lithium-free aluminum alloy suitable for forged aerospace products
US5652063A (en) Sheet or plate product made from a substantially vanadium-free aluminum alloy
CN112981196A (en) Ultrahigh-strength and high-toughness Al-Zn-Mg-Cu aluminum alloy and preparation method thereof
CN110564994A (en) low-cost high-toughness aluminum lithium alloy
CN108315618B (en) Preparation method of LPSO structure reinforced magnesium-lithium alloy
CN106011537A (en) Fine grain high-strength and high-toughness beta titanium alloy and manufacturing method thereof
CN113718139A (en) Al-Mg-Si-Cu-Mn aluminum alloy and processing method of extrusion material thereof
CN109881129B (en) Aging treatment process for Al-Li-Yb alloy
CN113444929A (en) Microalloying non-heat treatment high-strength and high-toughness die-casting aluminum alloy and preparation process thereof
CN113106303A (en) Method for improving ZL114A alloy strength by combining Zn microalloying and double-stage aging system
CN117026023A (en) Heat-treatment-free high-strength high-toughness die-casting aluminum alloy and preparation method thereof
CN113388754B (en) High-strength Ti-Cr-Zr-Mo-Al series titanium alloy and preparation method thereof
US5800927A (en) Vanadium-free, lithium-free, aluminum alloy suitable for sheet and plate aerospace products
US5665306A (en) Aerospace structural member made from a substantially vanadium-free aluminum alloy
CN1605650A (en) Aluminum magnesium containing alloy materials and method for making same
CN115786788B (en) Heat-resistant corrosion-resistant Al-Cu-Mg alloy and preparation method and application thereof
EP0214381B1 (en) Aluminum-lithium alloy
CN114592142A (en) Medium-strength high-toughness titanium alloy with yield strength of 800MPa for ocean engineering and preparation process thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20200703