CN102886618B - Aluminum-magnesium alloy welding wire for improving Mn content - Google Patents
Aluminum-magnesium alloy welding wire for improving Mn content Download PDFInfo
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Abstract
The invention discloses an aluminum-magnesium alloy welding wire for improving the Mn content. The aluminum-magnesium alloy welding wire is characterized in that the Mn content in the welding wire is improved by 1.0-2.0 wt%; if calculated in percentage by weight, the other chemical components of the welding wire comprise 4.5-5.5% of Mg, less than or equal to 0.15% of Si, less than or equal to 0.25% of Fe, less than or equal to 0.15% of Cr, less than or equal to 0.15% of Ti, less than or equal to 0.10% of Cu, less than or equal to 0.10% of Zn and less than or equal to 0.15% of Zr; and the balance are Al and inevitable impurity elements. The optimal addition quantity of Mn in the welding wire is 1.5 wt%. Because the Mn content in the aluminum-magnesium alloy welding wire provided by the invention is reached about the maximum solubility of Mn in a solid solution in an aluminum-magnesium alloy phase diagram, the Mn Al6 dispersoid particle is furthest separated out in the aluminum-magnesium alloy, so that the strength of a welded joint can be improved. After a lot of tests are carried out, compared with Al-5Mg alloy welding wires, such as 5356, 5183 and 5087 welding wires imported from a foreign country, the percentage elongation of the welding joint of the welding wire provided by the invention is approximate to that of the imported welding wires, while the yield strength and the tensile strength of the welding wire provided by the invention are improved and are more approximate to the level of an aluminum-magnesium alloy base metal.
Description
Technical field
The technical field of solder that to the invention belongs to the composition of material and character be feature for welding, is specifically related to the Al-Mg alloy welding wire that a kind of Fe content is higher than similar solder.
Background technology
Aluminium alloy element is in actual applications much by welding forming, and wherein the rear requirement of great majority welding is not carried out strengthen connotation and directly uses, the weld seam therefore usually requiring aluminium alloy welding wire to weld preferably does not need strengthen connotation namely to have higher intensity, plasticity and corrosion stability.Because almag (i.e. 5 ××× line aluminium alloys) is close to the requirement of above-mentioned combination property, therefore now widely used aluminium alloy welding wire is 5 ××× system Al-Mg alloy welding wires.But the intensity of existing Al-Mg alloy welding wire postwelding weld seam is still lower differs comparatively large with substrate intensity, can not give full play to the mechanical property potentiality of base material, weld seam just can be made in the urgent need to exploitation to obtain the aluminium alloy welding wire of better combination property without the need to strengthen connotation.
Owing to adding a small amount of manganese in almag, form the remarkable crystal grain thinning of disperse phase, not only can improve the plasticity of alloy, play the effect supplementing strengthening, but also can improving welding property.So just someone considers add manganese as welding wire in almag, but the addition of Tong Chang Manganese is all little, and most at below 0.8wt%, the highest is also no more than 1.2wt%.As Chinese patent application case " welding wire prepared from aluminum alloy in use for welding " (application number: the Fe content 200710025257.2) is 0.03 ~ 0.20wt%; Chinese patent application case " high-performance aluminium alloy automatic welding wire " (application number: 201210146910.1), Fe content is 0.05 ~ 0.20wt%.; Fe content in Chinese patent application case " a kind of high strength aluminum alloy welding wire and preparation method thereof " (application number is: 200910244555.X) is: 0.1 ~ 0.2wt%.Even if the Fe content in the Chinese patent of Japanese kobe steel Co., Ltd. " aluminium alloy welding wire " (patent No. is 02159361.2) is 0.01 ~ 1.2wt%, also only reach 1.2wt%.
In above-mentioned patent, why so few the addition of manganese is, and estimation is that when eutectic temperature 658 DEG C, the maxima solubility of manganese in αsolidsolution is only 1.82wt% because they are conceived to aluminium manganese binary system phase diagram.Traditional idea restrains everybody, makes them dare not add more manganese element in almag, is in fear of because there is the thick performance having influence on weld seam containing Mn phase.
Summary of the invention
The object of the invention is not need to heat-treat and the Al-Mg alloy welding wire still with higher intensity, percentage elongation and corrosion stability to find a kind of postwelding.For this reason, we still start with from further investigation aluminium Manganese binary phase diagraml, and manganese and aluminum binary system are typical eutectic phasors, and manganese can stop the recrystallization process of aluminium alloy, improve its recrystallization temperature, and can remarkable its crystal grain of refinement.Its effect mainly passes through MnAl
6the recrystal grain of dispersoid particle to aluminium to have grown up inhibition.On the other hand, we study MnAl
6during the precipitation of particle, find that it not only can hinder almag grain growth; Also invigoration effect (dispersion-strengtherning) can be played to almag; And its negative potential due to the negative potential with alloy matrix aluminum very close, even if there is superfluous MnAl
6phase, also can guarantee that it has good corrosion resistance; Weld seam is solder fast thawing and chilling formation in addition, the MnAl in alloy
6mutually tiny.Therefore, even if when improving Fe content in alloy, the combination property of almag also can not be affected.
From above-mentioned design, we are through a large amount of tests, finally have found a kind of postwelding do not need to heat-treat and the Al-Mg alloy welding wire still with higher intensity, percentage elongation and corrosion stability with improving the method for Fe content, achieve the object of our expection.
The invention provides a kind of Al-Mg alloy welding wire carrying high Mn content, it is characterized in that: the Mn content in welding wire is risen to 1.0 ~ 2.0wt%, remaining chemical composition of welding wire is by weight percentage: Mg:4.5 ~ 5.5; Si :≤0.15; Fe :≤0.25; Cr :≤0.15; Ti :≤0.15; Cu :≤0.10; Zn :≤0.10; Zr :≤0.15; Surplus is Al and inevitable impurity element.
The Al-Mg alloy welding wire carrying high Mn content of the present invention, it is 1.5% that the optimal addn of its Fe content is calculated by weight percentage.
Due to the content of manganese in the welding wire of almag, be in alumal phasor about the maxima solubility of manganese in αsolidsolution, it can separate out MnAl to greatest extent in almag
6dispersoid particle, thus can weld strength be improved.Carried out a large amount of tests through us, by it with the Al-5Mg alloy welding wire of external import as 5356; 5183 and 5087 welding wire contrasts, its tensile property is as shown in table 1:
Table 1 weld bond tensile property table
| Alloy | Yield strength MPa | Tensile strength MPa | Percentage elongation |
| Mother metal (the thick 5083 annealing sheet materials of 3mm) | 155.0 | 314.2 | 22.4％ |
| The weld seam of soldering wire alloy welding of the present invention | 146.0 | 300.9 | 15.2％ |
| The weld seam of import 5356 soldering wire alloy welding | 110 | 240 | 17％ |
| The weld seam of import 5183 soldering wire alloy welding | 125 | 275 | 17％ |
| The weld seam of import 5087 soldering wire alloy welding | 125 | 275 | 17％ |
Data from upper table: the mechanical property of its weld seam of welding wire of the present invention is compared with the similar welding wire of import, and percentage elongation is close, but yield strength, tensile strength all increase, closer to the level of almag mother metal.
We also carry out a large amount of tests to welding wire weld seam bending property of the present invention, (ISO058173:2000(E) is adopted international standards in test) ［ failure test of metal material weld seam---bend test ］ carry out, sample all occurs without cracking phenomena, illustrate that the plastic deformation performance (bending property) of weld seam is good, meet the quality requirement of aluminium alloy welding wire.
We are also to the weld seam of welding wire of the present invention, according to national technical standard GB/T7998-2005[aluminium alloy grain boundary corrosion assay method] carried out test, its result is identical with the performance of 5356 welding wires of import.
Innovative point embodiment of the present invention is to breach Fe content in almag (5 ×××s series) welding wire and is no more than the traditional concept of 1.2wt%, about Fe content being brought up to the maxima solubility of manganese in αsolidsolution, i.e. and 1.0 ~ 2.0wt%.Make full use of MnAl
6invigoration effect improve the intensity of weld seam, and improve its corrosion resisting property.
Detailed description of the invention
To by way of example content of the present invention be further described and be supplemented below.
With the high-purity Al of 99.99wt% and intermediate alloy Al-10wt%Mn, Al-4wt%Cr, Al-4wt%Ti for raw material, smelting technology deposite metal raw material routinely, stir, skim, remove the gred, degasification, static after, semi-continuous casting becomes diameter to be the semicontinuous ingot casting of 110mm, strip off the skin after 495 DEG C of Homogenization Treatments, 460 DEG C add and are hot extruded into the line base (extrusion ratio 38%) that diameter is 10mm, become diameter to be the line base of 3.8mm through twice 450 DEG C of intermediate annealings wire rod rolling that is 10mm by diameter, be finally drawn into the welding wire product that diameter is 3.3mm again.
Be after the welding wire surface cleaning of 3.3mm by diameter, with thick 5083 aluminum alloy plate materials of 3mm for base material, the reserved narrow gap of 2mm, adopts TIG to weld welding forming, then weld seam is polished undertaken stretching by national standard, bending and stress corrosion (cracking) test.
We choose some typical stoicheiometries and produce many batches of welding wires and carried out corresponding performance test to adopt above-mentioned technique, and its result is as follows:
Embodiment 1
Adopt that composition (by weight percentage calculate) is 1.5Mn, 4.5Mg ,≤0.15Si ,≤0.25Fe ,≤0.15Cr ,≤0.15Ti ,≤0.10Cu ,≤0.10Zn ,≤0.15Zr, surplus are Al and the welding wire compared with high Mn content of inevitable impurity element welds weld seam, tensile mechanical properties can reach tensile strength=300.9MPa, yield strength >=146.0MPa, percentage elongation=15.2%, and bending property and anti-stress corrosion performance all with coming to the same thing of adopting 5356 aluminium alloy welding wires to weld.
Embodiment 2
Adopt that composition (by weight percentage calculate) is 1.0Mn, 5.5Mg ,≤0.15Si ,≤0.25Fe ,≤0.15Cr ,≤0.15Ti ,≤0.10Cu ,≤0.10Zn ,≤0.15Zr, surplus are Al and the welding wire compared with high Mn content of inevitable impurity element welds weld seam, tensile mechanical properties can reach tensile strength=300.7MPa, yield strength=144.8MPa, percentage elongation=15.2%, and bending property and anti-stress corrosion performance all with coming to the same thing of adopting 5356 aluminium alloy welding wires to weld.
Embodiment 3
Adopt that composition (by weight percentage calculate) is 2.0Mn, 5.0Mg ,≤0.15Si ,≤0.25Fe ,≤0.15Cr ,≤0.15Ti ,≤0.10Cu ,≤0.10Zn ,≤0.15Zr, surplus are Al and the welding wire compared with high Mn content of inevitable impurity element welds weld seam, tensile mechanical properties can reach tensile strength=302.0MPa, yield strength=147.3MPa, percentage elongation=14.7%, and bending property and anti-stress corrosion performance all with coming to the same thing of adopting 5356 aluminium alloy welding wires to weld.
Embodiment 4
Adopt that composition (by weight percentage calculate) is 1.3Mn, 5.2Mg ,≤0.15Si ,≤0.25Fe ,≤0.15Cr ,≤0.15Ti ,≤0.10Cu ,≤0.10Zn ,≤0.15Zr, surplus are Al and the welding wire compared with high Mn content of inevitable impurity element welds weld seam, tensile mechanical properties can reach tensile strength=300.9MPa, yield strength=146.2MPa, percentage elongation=15.2%, and bending property and anti-stress corrosion performance all with coming to the same thing of adopting 5356 aluminium alloy welding wires to weld.
We emphasize again: creativeness of the present invention is embodied in has abolished the traditional concept that Fe content in Al-Mg alloy welding wire is no more than 1.2Wt%, Fe content in Al-Mg alloy welding wire has been brought up to maxima solubility about the 1.82wt% of manganese in αsolidsolution, it can separate out MnAl to greatest extent in almag
6dispersoid particle, thus improve weld strength, and resulting in a kind of postwelding and do not need to heat-treat and the Al-Mg alloy welding wire still with higher intensity, percentage elongation and corrosion stability.As long as Fe content is more than more than 1.2wt% in Al-Mg alloy welding wire, just will be considered as having invaded patent legitimate rights and interests of the present invention.
Claims (2)
1. carry an Al-Mg alloy welding wire for high Mn content, it is characterized in that: the Mn content in welding wire is risen to 1.3 ~ 2.0wt%, the chemical composition of all the other elements of welding wire is by weight percentage: Mg:4.5 ~ 5.5; Si :≤0.15; Fe :≤0.25; Cr :≤0.15; Ti :≤0.15; Cu :≤0.10; Zn :≤0.10; Zr :≤0.15; Surplus is Al.
2. by the Al-Mg alloy welding wire carrying high Mn content according to claim 1, it is characterized in that: the optimal addn of said Fe content is 1.5wt%.
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10654135B2 (en) | 2010-02-10 | 2020-05-19 | Illinois Tool Works Inc. | Aluminum alloy welding wire |
| CN103286472B (en) * | 2013-05-21 | 2015-12-23 | 辽宁石油化工大学 | A kind of novel aluminum alloy welding wire |
| EP3470167B1 (en) * | 2014-01-22 | 2022-01-12 | Illinois Tool Works Inc. | Method for forming a weld joint |
| CN104785950B (en) * | 2015-04-15 | 2018-03-16 | 北京工业大学 | A kind of Laser Welding of Aluminum Alloys Al Mg Sc series solder wires |
| CN105710569A (en) * | 2016-04-12 | 2016-06-29 | 兰州威特焊材科技股份有限公司 | Preparation method for high-purity CRRCSAL5183G aluminum-magnesium alloy TIG/MIG welding wire special for high-speed rail train |
| CN106282687A (en) * | 2016-07-29 | 2017-01-04 | 安徽飞狐焊业股份有限公司 | A kind of aluminium alloy welding wire of argentiferous and stannum and preparation method thereof |
| CN107081536A (en) * | 2017-05-09 | 2017-08-22 | 安徽飞弧焊业股份有限公司 | A kind of municipal rail train is with antifatigue high toughness Al-alloy welding wire |
| JP6886861B2 (en) * | 2017-05-29 | 2021-06-16 | 三菱造船株式会社 | Welding method of aluminum alloy |
| CN108262576B (en) * | 2018-01-26 | 2020-10-13 | 江苏豪然新材料有限公司 | Aluminum alloy welding wire and manufacturing method thereof |
| CN108340098A (en) * | 2018-02-08 | 2018-07-31 | 周天国 | A kind of processing technology of 5183 aluminium alloy semi-finished product welding wire |
| CN108161273A (en) * | 2018-03-06 | 2018-06-15 | 东北大学 | A kind of Al-Mg-Zn-Mn aluminium alloy welding wires and preparation method thereof |
| CN110666307A (en) * | 2019-10-15 | 2020-01-10 | 上海船舶工艺研究所(中国船舶工业集团公司第十一研究所) | Welding method for single-side welding and double-side forming of aluminum alloy plate |
| CN113088774B (en) * | 2021-03-08 | 2022-04-26 | 上海交通大学 | High-resistance Al-Mg-Mn-Ti aluminum alloy and preparation process thereof |
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| CN101722381A (en) * | 2009-11-09 | 2010-06-09 | 浙江东轻高新焊丝有限公司 | Aluminum alloy solder wire for rapid trains and manufacturing method thereof |
| CN102615396A (en) * | 2012-02-16 | 2012-08-01 | 山东大学 | Filling wire inert gas protective welding method for magnesium alloy pipe and aluminum alloy pipe |
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| US7494043B2 (en) * | 2004-10-15 | 2009-02-24 | Aleris Aluminum Koblenz Gmbh | Method for constructing a welded construction utilizing an Al-Mg-Mn weld filler alloy |
| US7383713B2 (en) * | 2005-03-30 | 2008-06-10 | Aleris Aluminum Koblenz Gmbh | Method of manufacturing a consumable filler metal for use in a welding operation |
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|---|---|---|---|---|
| US4216016A (en) * | 1977-06-29 | 1980-08-05 | Swiss Aluminium Ltd. | Filler metal for welding aluminum alloys |
| CN101722381A (en) * | 2009-11-09 | 2010-06-09 | 浙江东轻高新焊丝有限公司 | Aluminum alloy solder wire for rapid trains and manufacturing method thereof |
| CN102615396A (en) * | 2012-02-16 | 2012-08-01 | 山东大学 | Filling wire inert gas protective welding method for magnesium alloy pipe and aluminum alloy pipe |
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