CN110666308B - Flat butt joint MIG welding method for dissimilar aluminum alloy welding joint - Google Patents
Flat butt joint MIG welding method for dissimilar aluminum alloy welding joint Download PDFInfo
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- CN110666308B CN110666308B CN201910976019.2A CN201910976019A CN110666308B CN 110666308 B CN110666308 B CN 110666308B CN 201910976019 A CN201910976019 A CN 201910976019A CN 110666308 B CN110666308 B CN 110666308B
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- 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
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- 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
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a flat butt MIG welding method for a dissimilar aluminum alloy welding joint, which is characterized in that a conventional aluminum alloy plate and a high-strength corrosion-resistant aluminum-magnesium alloy plate are subjected to MIG double-sided welding, the welding position is a flat position, a single-side 14-17-degree symmetrical V-shaped groove is adopted as the groove, and the bottom gap width of the groove is 0-2 mm. The method is particularly suitable for welding 5083 aluminum alloy in an H116 state and high-strength corrosion-resistant aluminum-magnesium alloy in an O state, the weld joint surface is formed uniformly, obvious surface defects such as cracks, incomplete fusion and the like do not exist, the number of air holes after welding is less than that of the traditional welding method, the yield strength and the tensile strength of the welding joint are high, and the requirements of special purposes of ships can be met.
Description
Technical Field
The invention belongs to the technical field of aluminum alloy material welding, and particularly relates to a flat butt MIG (metal inert gas) welding method suitable for high-strength corrosion-resistant aluminum-magnesium alloy and dissimilar aluminum alloy, which is suitable for welding dissimilar aluminum alloy between 5083 aluminum alloy in an H116 state and the high-strength corrosion-resistant aluminum-magnesium alloy in an O state.
Background
The aluminum alloy has the characteristics of small specific gravity, good corrosion resistance, easy processing and the like, is widely applied to ships, and is mainly a 5083 plate and a 6082 section in China at present. With the improvement of the requirements of ships on navigational speed, loading capacity and structural weight, the demand for high-strength corrosion-resistant aluminum alloy is more urgent.
At present, the high-strength corrosion-resistant aluminum magnesium alloy material has been developed in China, the magnesium content is 5.5% -6.5%, the strength can reach 333Mpa, the high-strength corrosion-resistant aluminum alloy has serious burning loss, large air hole and crack sensitivity and serious softening of a welding joint in the welding process due to the increase of the magnesium content, the high-strength corrosion-resistant aluminum magnesium alloy relates to the welding with 5083 dissimilar aluminum alloy in the ship construction process, and no welding process suitable for the welding of the high-strength corrosion-resistant aluminum magnesium alloy and the 5083 aluminum alloy dissimilar aluminum alloy exists at present.
Disclosure of Invention
The invention aims to provide a flat butt MIG welding method of a high-strength corrosion-resistant aluminum-magnesium alloy and a dissimilar aluminum alloy, which solves the problems of serious burning loss, large air hole and crack sensitivity and serious softening of a welding joint in the welding process of the high-strength corrosion-resistant aluminum alloy in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the flat butt MIG welding method for the dissimilar aluminum alloy welding joint is characterized in that a conventional aluminum alloy plate and a high-strength corrosion-resistant aluminum-magnesium alloy plate are subjected to MIG double-sided welding, the welding position is a flat position, a single-side 14-17-degree symmetrical V-shaped groove is adopted as the groove, and the bottom gap width of the groove is 0-2 mm.
Furthermore, the welding voltage of the welding is 19-21V, the welding current is 90-100A, and the protective gas flow is 17-20L/min.
Further, the groove is preferably a single-side 15-degree symmetrical V-shaped groove; preferably, the flow rate of the shielding gas is 18L/min.
The conventional aluminum alloy plate is a 5083-H116 aluminum magnesium alloy plate, and the thickness of the conventional aluminum alloy plate is 3.5-4.5 mm, preferably 4 mm; the high-strength corrosion-resistant aluminum-magnesium alloy plate is in an O state and comprises the following components in percentage by mass: si: less than or equal to 0.4 percent, Fe: less than or equal to 0.4 percent, Cu: less than or equal to 0.1 percent, Mn: 0.7% -1.3%, Mg: 5.5% -6.5%, Zn: less than or equal to 0.2 percent, Zr: 0.02 to 0.12 percent of Al and the balance of inevitable impurities; the thickness of the material is 3.5-4.5 mm, preferably 4 mm.
The welding wire adopted by the welding comprises the following components in percentage by mass: si: less than or equal to 0.4 percent, Fe: less than or equal to 0.4 percent, Cu: less than or equal to 0.05 percent, Mn: 0.8% -1.1%, Mg: 5.5% -6.5%, Zn: less than or equal to 0.2 percent, Zr: 0.02-0.12 percent, the balance of Al and inevitable impurities, and the diameter of the welding wire is 1.0mm or 1.2 mm.
The shielding gas adopted by the welding is argon, and the purity of the argon is more than or equal to 99.995%.
Furthermore, the flat butt MIG welding method for the dissimilar aluminum alloy welding joint disclosed by the invention is used for welding under the conditions that the ambient temperature is not less than 0 ℃ and the relative humidity is not higher than 85%, and preheating is not needed during welding.
The flat butt MIG welding method for the dissimilar aluminum alloy welding joint is particularly suitable for welding 5083 aluminum alloy in an H116 state and high-strength corrosion-resistant aluminum-magnesium alloy in an O state, the weld joint surface is formed uniformly, obvious surface defects such as cracks, incomplete fusion and the like do not exist, the number of air holes after welding is less than that of a traditional welding method, the yield strength and the tensile strength of the welding joint are high, and the special application requirements of ships can be met.
Detailed Description
It should be understood by those skilled in the art that the present embodiment is only for illustrating the present invention and is not to be used as a limitation of the present invention, and changes and modifications of the embodiment can be made within the scope of the claims of the present invention.
(1) Welding material
The conventional aluminum alloy plate comprises the following components: a5083 aluminum alloy in H116 state having a plate thickness of 4 mm.
The high-strength corrosion-resistant aluminum-magnesium alloy plate is in an O state and comprises the following components in percentage by mass: si: less than or equal to 0.4 percent, Fe: less than or equal to 0.4 percent, Cu: less than or equal to 0.1 percent, Mn: 0.7% -1.3%, Mg: 5.5% -6.5%, Zn: less than or equal to 0.2 percent, Zr: 0.02 to 0.12 percent of Al and the balance of inevitable impurities; the thickness is 4 mm.
The welding wire adopted by the welding comprises the following components in percentage by mass: si: less than or equal to 0.4 percent, Fe: less than or equal to 0.4 percent, Cu: less than or equal to 0.05 percent, Mn: 0.8% -1.1%, Mg: 5.5% -6.5%, Zn: less than or equal to 0.2 percent, Zr: 0.02 to 0.12 percent of the total weight of the welding wire, and the balance of Al and inevitable impurities, wherein the diameter of the welding wire is 1.2 mm.
The shielding gas adopted by the welding is argon, and the purity of the argon is more than or equal to 99.995%.
(2) Welding method
Carrying out MIG double-sided welding on a conventional aluminum alloy plate and a high-strength corrosion-resistant aluminum-magnesium alloy plate, wherein the welding position is a flat position, a single-side 14-17-degree symmetrical V-shaped groove is adopted as the groove, and the bottom gap width of the groove is 0-2 mm. The welding voltage of welding is 19-21V, the welding current is 90-100A, and the protective gas flow is 17-20L/min.
Examples 1 to 3
Welding at ambient temperature of not less than 0 deg.C and relative humidity of not more than 85%. The welding process parameters of examples 1-3 are shown in Table 1.
TABLE 1 welding Process parameters for examples 1-3
(4) Test results
And (3) inspecting the internal quality of the welded joint of the welded aluminum alloy, carrying out X-ray flaw detection on the welded joint according to relevant regulations in the CB3929 standard, and judging that the X-ray flaw detection rating of the internal quality of the welded joint is not lower than grade I.
And (4) carrying out test piece inspection on the welding joint according to GB/T2651-2008 and GB/T2653-2008 to finish the detection of the tensile and bending properties. The test results are shown in table 2, and meet the standard requirements.
TABLE 2 weld joint Performance of examples 1-3
The yield strength of the welded joint of the aluminum plate after welding reaches 196Mpa, the tensile strength reaches 291Mpa, and the length of cracks or other defects on the surface of the welded joint is not more than 3mm after the welded joint is bent by 180 degrees in a surface bending or back bending mode, wherein the diameter of the welded joint is 22 mm.
In the appearance inspection of the welding seam of the welded joint of the aluminum plate after welding, the quality inspection of the welding seam surface meets the relevant regulations in CB/T3747, the welding seam surface is uniformly formed, and no cracks, fusion and other obvious surface defects exist.
Claims (6)
1. A flat butt MIG welding method for a dissimilar aluminum alloy welding joint is characterized in that a conventional aluminum alloy plate and a high-strength corrosion-resistant aluminum-magnesium alloy plate are subjected to MIG double-sided welding, the welding position is a flat position, a single-side 14-17-degree symmetrical V-shaped groove is adopted as the groove, and the bottom gap width of the groove is 0-2 mm; the conventional aluminum alloy plate is a 5083-H116 aluminum magnesium alloy plate, and the thickness of the conventional aluminum alloy plate is 3.5-4.5 mm; the high-strength corrosion-resistant aluminum-magnesium alloy plate is in an O state and comprises the following components in percentage by mass: si: less than or equal to 0.4 percent, Fe: less than or equal to 0.4 percent, Cu: less than or equal to 0.1 percent, Mn: 0.7% -1.3%, Mg: 5.5% -6.5%, Zn: less than or equal to 0.2 percent, Zr: 0.02 to 0.12 percent of Al and the balance of inevitable impurities; the thickness of the material is 3.5-4.5 mm; the welding wire adopted by the welding comprises the following components in percentage by mass: si: less than or equal to 0.4 percent, Fe: less than or equal to 0.4 percent, Cu: less than or equal to 0.05 percent, Mn: 0.8% -1.1%, Mg: 5.5% -6.5%, Zn: less than or equal to 0.2 percent, Zr: 0.02 to 0.12 percent of alloy wire, the balance of Al and inevitable impurities, and the diameter of the welding wire is 1.0mm or 1.2 mm; the shielding gas adopted by the welding is argon, and the purity of the argon is more than or equal to 99.995%.
2. The butt MIG welding process of claim 1 wherein the bevel is a single sided 15 ° symmetrical V-groove.
3. The MIG welding process with flat butt joint as claimed in claim 1, wherein the welding voltage is 19-21V, the welding current is 90-100A, and the shielding gas flow is 17-20L/min.
4. Flat butt MIG welding method according to claim 3 where the shield gas flow is 18L/min.
5. Flat butt MIG welding method according to claim 1 where the conventional aluminium alloy sheet thickness is 4 mm; the thickness of the high-strength corrosion-resistant aluminum-magnesium alloy plate is 4 mm.
6. A flat butt MIG welding process as claimed in any one of claims 1 to 5 wherein the welding is carried out at ambient temperature of not less than 0 ℃ and relative humidity of not more than 85% without preheating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910976019.2A CN110666308B (en) | 2019-10-15 | 2019-10-15 | Flat butt joint MIG welding method for dissimilar aluminum alloy welding joint |
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| CN201910976019.2A CN110666308B (en) | 2019-10-15 | 2019-10-15 | Flat butt joint MIG welding method for dissimilar aluminum alloy welding joint |
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| CN110666308B true CN110666308B (en) | 2021-10-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112171023A (en) * | 2020-09-11 | 2021-01-05 | 中铝材料应用研究院有限公司 | Method for reducing air holes of welding joints of automobile body sheet aluminum alloy section and casting |
| CN115229306B (en) * | 2022-07-14 | 2024-02-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for improving bending performance of welded joint of QSTE pickling plate |
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| JP2003220481A (en) * | 2002-01-23 | 2003-08-05 | Kobe Steel Ltd | Method and welding wire for arc-laser composite welding |
| CN101716704A (en) * | 2009-10-30 | 2010-06-02 | 北京工业大学 | Al-Mg-Er welding wire and preparation process thereof |
| CN103111731A (en) * | 2013-01-23 | 2013-05-22 | 北京赛德高科铁道电气科技有限责任公司 | Welding method for longitudinal butt joint of thin-wall aluminum alloy non-profile long pipes |
| CN103537784A (en) * | 2013-10-29 | 2014-01-29 | 南京南车浦镇城轨车辆有限责任公司 | Metal inert gas (MIG) welding method of aluminum alloy thin plate for high speed train |
| CN103639575A (en) * | 2013-11-28 | 2014-03-19 | 辽宁忠旺集团有限公司 | Method for welding aluminum alloy boat deck through MIG welding |
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2019
- 2019-10-15 CN CN201910976019.2A patent/CN110666308B/en active Active
Patent Citations (5)
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| JP2003220481A (en) * | 2002-01-23 | 2003-08-05 | Kobe Steel Ltd | Method and welding wire for arc-laser composite welding |
| CN101716704A (en) * | 2009-10-30 | 2010-06-02 | 北京工业大学 | Al-Mg-Er welding wire and preparation process thereof |
| CN103111731A (en) * | 2013-01-23 | 2013-05-22 | 北京赛德高科铁道电气科技有限责任公司 | Welding method for longitudinal butt joint of thin-wall aluminum alloy non-profile long pipes |
| CN103537784A (en) * | 2013-10-29 | 2014-01-29 | 南京南车浦镇城轨车辆有限责任公司 | Metal inert gas (MIG) welding method of aluminum alloy thin plate for high speed train |
| CN103639575A (en) * | 2013-11-28 | 2014-03-19 | 辽宁忠旺集团有限公司 | Method for welding aluminum alloy boat deck through MIG welding |
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| "铝镁合金与铸铝合金的焊接工艺";周大杰、张昕;《焊接》;20080630(第6期);第64-65页 * |
| 周大杰、张昕."铝镁合金与铸铝合金的焊接工艺".《焊接》.2008,(第6期),第64-65页. * |
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Address after: 200032 No. two, 851 South Road, Xuhui District, Shanghai, Zhongshan Patentee after: Shanghai Shipbuilding Technology Research Institute (the 11th Research Institute of China Shipbuilding Corp.) Address before: 200032 No. two, 851 South Road, Xuhui District, Shanghai, Zhongshan Patentee before: SHIPBUILDING TECHNOLOGY Research Institute (NO 11 RESEARCH INSTITUTE OF CHINA STATE SHIPBUILDING Corp.,Ltd.) |
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