CN105345308A - Welding wire used for Al-Cu-Li system aluminum lithium alloy and Al-Cu system aluminum alloy - Google Patents

Welding wire used for Al-Cu-Li system aluminum lithium alloy and Al-Cu system aluminum alloy Download PDF

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Publication number
CN105345308A
CN105345308A CN201510725806.1A CN201510725806A CN105345308A CN 105345308 A CN105345308 A CN 105345308A CN 201510725806 A CN201510725806 A CN 201510725806A CN 105345308 A CN105345308 A CN 105345308A
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China
Prior art keywords
alloy
welding wire
welding
lithium alloy
system aluminum
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CN201510725806.1A
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Chinese (zh)
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CN105345308B (en
Inventor
何维维
臧金鑫
吴秀亮
李国爱
伊琳娜
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BEIJING INSTITUTE OF AERONAUTICAL MATERIALS CHINA AVIATION INDUSTRY GROUP Corp
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BEIJING INSTITUTE OF AERONAUTICAL MATERIALS CHINA AVIATION INDUSTRY GROUP Corp
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • B23K35/288—Al as the principal constituent with Sn or Zn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
    • 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
    • C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
    • 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

Abstract

The invention discloses a welding wire used for an Al-Cu-Li system aluminum lithium alloy and an Al-Cu system aluminum alloy. The welding wire is prepared from, by mass percentage, 5.40% of Cu, 0.35% to 1.00% of Sc, 0.10% to 0.30% of Cd, smaller than or equal to 0.10% of Zn, smaller than or equal to 0.05% of Mg, smaller than or equal to 0.06% of Si, smaller than or equal to 0.15% of Fe, smaller than or equal to 0.15% of other impurities and the balance Al, wherein the mass percentage of each kind of the impurities is smaller than or equal to 0.05%. When the Al-Cu-Sc system welding wire is used for fusion welding of the Al-Cu-Li system aluminum lithium alloy and the Al-Cu system aluminum alloy, the structure of a welding joint is fine, the crack resistance is good, and the comprehensive mechanical properties of a connector are good.

Description

A kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy
Technical field
The present invention relates to a kind of welding material, be specifically related to a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy.
Background technology
Due to lower density, higher specific strength and specific stiffness, aluminium lithium alloy obtains the concern of people at such as aerospace field.In recent years, suitable reduction Li content, increase Cu content and add the third generation Al-Cu-Li-X system alloy that multi-element alloyed element grows up and have good combination property such as excellent resistant to damage performance, fracture toughness etc., alloy part is wherein applied at aerospace field.In order to realize structure loss of weight further, with welding manner substitute riveted joint become high-performance aluminum lithium alloy application in an important trend.Due to welding process, there is easy and simple to handle, technique exploitativeness and the feature such as applicability is strong, with low cost, become welded main separation method, but application has been restricted because of factors such as its joint made by flame welding intensity are low, fatigue life is low, corrosion resistance is poor.
In order to improve the melting welding performance of third generation aluminium lithium alloy, numerous researcher explores the way of adding micro alloying element and carrys out improving welding property.The analysis of a large amount of prior aries is shown, in Al-Cu-Li system aluminium lithium alloy, add Ag and/or Sc element can improve melting welding performance and improve corrosion resistance, the series alloys such as the argentiferous 2195,2198,2060 that some bibliographical informations are developed based on this, Russia develops the series alloys such as 1424,1441,1469 containing Sc.
It is reported the alloy melting welding of Al-Cu-Li system time, the existing Al-Mg series solder wire of many employings (5556,5654) or Al-Cu series solder wire (2319,2325), wherein the former can improve corrosion resistance and the fracture toughness of weld seam, but weld strength and formability poor, the latter can improve intensity and the forming property of weld seam, but easily forms hot tearing.In welding wire, add appropriate Sc element then can play the effect that thinning microstructure improves combination property, CN103286471A and CN1954959A Chinese patent literature discloses Al-Mg-Sc series solder wire, find the Al-Cu-Sc series solder wire of Sc as main adding elements through the large quantifier elimination of the present inventor, observation, test, analysis, contrast, the effect of Sc in Al-Cu welding wire can be given full play to, improve the melting welding performance of Al-Cu-Li system and Al-Cu system alloy.
Summary of the invention
The object of the present invention is to provide a kind of Al-Cu-Sc series solder wire meeting Al-Cu-Li system aluminium lithium alloy and the welding of Al-Cu line aluminium alloy through engineering approaches.
For achieving the above object, the present invention is by the following technical solutions:
A kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy, by mass percentage, its chemical composition consists of: Cu:5.40%, Sc:0.35 ~ 1.00%, Cd:0.10 ~ 0.30%, Zn≤0.10%, Mg≤0.05%, Si≤0.06%, Fe≤0.15%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
First preferred version of described a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy, described Sc consists of 0.65%.
Second preferred version of described a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy, described Cd consists of 0.10%.
3rd preferred version of described a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy, described Cd consists of 0.15%.
4th preferred version of described a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy, described Cd consists of 0.20%.
5th preferred version of described a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy, described Cd consists of 0.30%.
Compared with immediate prior art, the present invention has following excellent effect:
One, use Al-Cu-Sc series solder wire molten solder Al-Cu-Li system's aluminium lithium alloy provided by the invention and Al-Cu line aluminium alloy, seam organization is fine and closely woven, and crack resistance is good, and joint comprehensive mechanical property is good.
Two, Al-Cu-Sc series solder wire provided by the invention, welding point street corner combination property significantly improves: 1) crack resistance of aluminium lithium alloy welding point obviously strengthens.Adopt the cracking test of 2A97 (Al-Cu-Li system) alloy cross sample butt joint to show, flawless produces; 2) the obvious refinement of seam organization.The welding seam crystal grain diameter of 2A97 aluminium lithium alloy and ZL205 (Al-Cu system) alloy is at about 15 ~ 25mm; 3) tensile strength at least improves 15% compared with 65% of 2319 welding wires.Adopt automatic MIG welding 2A97 and ZL205 alloy, welding point tensile strength reaches more than 80% (removal weld reinforcement) of mother metal; 4) plasticity of welding point and toughness improve.The percentage elongation of such as 2A97 and ZL205 alloy butt weld and impact flexibility comparatively 2319 welding wires improve 20% ~ 40%.
Detailed description of the invention
Below in conjunction with embodiment, be clearly and completely described technical scheme of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In order to improve welding technology intensity, reduce again the loss of mother metal plasticity as much as possible simultaneously, any 2 ~ 6 kinds of adding in Al-Cu-Sc welding wire in 6 kinds of micro alloying elements such as Mn, Ag, Cd, Ti, Zr, V carry out multi-element alloyed, realize the alloying of Al-Cu-Li system aluminium lithium alloy and Al-Cu system alloy arc-seam weld, improve the crack-resistance sensitivity of weld metal intensity and welding point.Adding of above-mentioned alloy element, Al can be promoted in welding process 3(Sc, Zr, Ti), Al 2ag, Al 6mn, Al 20cu 3mn 2, Al 10the formation of intermetallic compounds such as (V, Ti), these compounds restrict mutually, inhibit the formation of coarsening compound in molten bath, and the non-equilibrium crystallization for molten bath provides enough forming core particles, thus refinement seam organization, reduce the crackle tendency of weld seam; In addition, the solid solution strengthening effect that the adding of multicomponent alloy improve aluminum substrate also forms tiny multiple elements design particle, effectively improves the intensity of weld seam.
Embodiment 1
The chemical composition of Al-Cu-Sc line aluminium alloy welding wire of the present invention is by mass percentage: Cu:5.40%, Sc:0.65%, Cd:0.1%, Zn:0.07%, Mg:0.04%, Si:0.05%, Fe:0.14%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
Embodiment 2
The chemical composition of Al-Cu-Sc line aluminium alloy welding wire of the present invention is by mass percentage: Cu:5.40%, Sc:0.65%, Cd:0.15%, Zn:0.07%, Mg:0.04%, Fe:0.14%, Si:0.05%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
Embodiment 3
The chemical composition of Al-Cu-Sc line aluminium alloy welding wire of the present invention is by mass percentage: Cu:5.40%, Sc:0.65%, Cd:0.20%, Zn:0.07%, Mg:0.04%, Fe:0.14%, Si:0.05%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
Embodiment 4
The chemical composition of Al-Cu-Sc line aluminium alloy welding wire of the present invention is by mass percentage: Cu:5.40%, Sc:0.65%, Cd:0.30%, Zn:0.07%, Mg:0.04%, Fe:0.14%, Si:0.05%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
The aluminium alloy welding wire above embodiment prepared is as packing material, and at room temperature, adopt MIG weldering welding, X-ray detection of welding, seam cross-section metallographic structure is observed, and correlated results is as shown in the table:
Above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; those of ordinary skill in the field are to be understood that; can modify to the specific embodiment of the present invention with reference to above-described embodiment or equivalent to replace, these do not depart from any amendment of spirit and scope of the invention or equivalently to replace within the claims that all awaits the reply in application.

Claims (6)

1. the welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy, it is characterized in that: by mass percentage, its chemical composition consists of: Cu:5.40%, Sc:0.35 ~ 1.00%, Cd:0.10 ~ 0.30%, Zn≤0.10%, Mg≤0.05%, Si≤0.06%, Fe≤0.15%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
2. a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy according to claim 1, is characterized in that: described Sc consists of 0.65%.
3. a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy according to claim 1, is characterized in that: described Cd consists of 0.10%.
4. a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy according to claim 1, is characterized in that: described Cd consists of 0.15%.
5. a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy according to claim 1, is characterized in that: described Cd consists of 0.20%.
6. a kind of welding wire for Al-Cu-Li system aluminium lithium alloy and Al-Cu line aluminium alloy according to claim 1, is characterized in that: described Cd consists of 0.3%.
CN201510725806.1A 2015-10-29 2015-10-29 Welding wire for Al-Cu-Li series aluminum lithium alloy and Al-Cu series aluminum alloy Expired - Fee Related CN105345308B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5211910A (en) * 1990-01-26 1993-05-18 Martin Marietta Corporation Ultra high strength aluminum-base alloys
US5455003A (en) * 1988-08-18 1995-10-03 Martin Marietta Corporation Al-Cu-Li alloys with improved cryogenic fracture toughness
US5512241A (en) * 1988-08-18 1996-04-30 Martin Marietta Corporation Al-Cu-Li weld filler alloy, process for the preparation thereof and process for welding therewith
JPH09104940A (en) * 1995-10-09 1997-04-22 Furukawa Electric Co Ltd:The High-tensile aluminum-copper base alloy excellent in weldability
CN1332260A (en) * 2001-07-26 2002-01-23 华南理工大学 Aluminium-base cast alloy material with high tenacity and less hot cacking tendency
CN101176955A (en) * 2006-11-10 2008-05-14 航天材料及工艺研究所 Soldering wire for high-strength aluminum copper alloy
CN102021399A (en) * 2009-09-17 2011-04-20 贵州华科铝材料工程技术研究有限公司 Ag-Sc-RE aluminium alloy material with high strength and heat resistance and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5455003A (en) * 1988-08-18 1995-10-03 Martin Marietta Corporation Al-Cu-Li alloys with improved cryogenic fracture toughness
US5512241A (en) * 1988-08-18 1996-04-30 Martin Marietta Corporation Al-Cu-Li weld filler alloy, process for the preparation thereof and process for welding therewith
US5211910A (en) * 1990-01-26 1993-05-18 Martin Marietta Corporation Ultra high strength aluminum-base alloys
JPH09104940A (en) * 1995-10-09 1997-04-22 Furukawa Electric Co Ltd:The High-tensile aluminum-copper base alloy excellent in weldability
CN1332260A (en) * 2001-07-26 2002-01-23 华南理工大学 Aluminium-base cast alloy material with high tenacity and less hot cacking tendency
CN101176955A (en) * 2006-11-10 2008-05-14 航天材料及工艺研究所 Soldering wire for high-strength aluminum copper alloy
CN102021399A (en) * 2009-09-17 2011-04-20 贵州华科铝材料工程技术研究有限公司 Ag-Sc-RE aluminium alloy material with high strength and heat resistance and preparation method thereof

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