CN103056546A - Welding wire for welding titanium alloy and pure aluminum plate in argon tungsten-arc welding (TIG) method - Google Patents
Welding wire for welding titanium alloy and pure aluminum plate in argon tungsten-arc welding (TIG) method Download PDFInfo
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- CN103056546A CN103056546A CN2013100406025A CN201310040602A CN103056546A CN 103056546 A CN103056546 A CN 103056546A CN 2013100406025 A CN2013100406025 A CN 2013100406025A CN 201310040602 A CN201310040602 A CN 201310040602A CN 103056546 A CN103056546 A CN 103056546A
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Abstract
The invention provides a welding wire for welding a titanium alloy and a pure aluminum plate in an argon tungsten-arc welding (TIG) method. The titanium and aluminum are subjected to argon tungsten-arc welding by employing a specific ratio and a welding wire coated with an active agent, so that the involved pre-aluminizing treatment in the vacuum diffusion welding process is avoided, and the welding cost of the vacuum environment or laser conditions is reduced. Therefore, the fused filling metal and pure aluminum base metal are fully fused and mixed and then are solidified to form a welding line in the welding process, and an obvious fusion zone exists; and moreover, the high-melting point titanium alloy and the fused welding wire filling metal interact to form brazed connection, and the phenomenon that the two metal liquid-phase Ti and Al are mixed to generate lots of brittle Ti-Al intermetallic compounds is avoided, and the active agent on the surface of the welding wire can have the function of increasing the welding penetration, so that a welding joint with attractive welding line appearance and without cracks is obtained. Therefore, the welding wire has the advantages of improving the production efficiency and improving the joint performance, with convenience in operation.
Description
Technical field
The invention belongs to the welding technology field of foreign material, particularly the TIG method of a kind of welding titanium alloy and pure aluminum plate reaches the welding wire that is used for TIG method welding titanium alloy and pure aluminum plate.
Background technology
Many excellent characteristics such as that titanium has is lightweight, intensity is large, heat resistance is strong, corrosion-resistant are described as " following metal ", are the new structural materials with development prospect.Titanium and alloy thereof not only have very important application in aviation, space travel industry, and have begun extensive use in many industrial departments such as chemical industry, oil, light industry, metallurgy, generating.Aluminium has the advantages such as specific strength is high, processability good, Physical and mechanical properties is superior, anticorrosive, is considered to the most economical and the most practical material in a lot of applications.Under most of environmental conditions, be included in air, water (or salt solution), petrochemistry and a lot of chemical system, aluminium can demonstrate good corrosion resistance.The surface of aluminium has the reflectivity of height.Aluminium demonstrates good electrical conductivity and thermal conductivity usually, and some special aluminum alloy with high resistivity are also succeeded in developing, and these alloys can be used in the motor such as high torque (HT).Aluminium is often selected owing to its excellent conductivity.On equiponderant basis, the electrical conductivity of aluminium is bordering on the twice of copper.Titanium alloy and aluminium are extremely important in industrial application, the fields that have a lot of industry to intersect, this so that aluminium be connected connection with titanium significant.But aluminium is connected the connection difficulty with titanium very large.In welding process, because the solubility between Ti and the Al is minimum at ambient temperature, because the hot physical and chemical performance between the aluminium titanium differs greatly, can produce the intermetallic compound of a large amount of fragility when welding with traditional welding method, thereby affect joint performance.At present, traditional welding method of Ti/Al different alloys mainly contains the molten soldering of electric arc, diffusion welding (DW), soldering, friction welding (FW) etc.
Diffusion welding (DW) is that two weldments are combined closely, and in vacuum or protective atmosphere, keeps a period of time under uniform temperature and pressure, makes the atom phase counterdiffusion between the contact-making surface finish welding.Therefore the diffusion welding (DW) characteristics that still can effectively avoid aluminium titanium material melting point to differ greatly and be difficult to connect.Proof after check, the mechanical strength of the welding point of vacuum diffusion welding, heat endurance, sealing, corrosion resistance and elasticity can both satisfy the specification requirement of important component.But this welding method requires the vacuum environment compacted under, and from economical production, cost is larger, is not suitable for aluminium titanium material in enormous quantities and connects moulding.
Electric arc heated is concentrated, and heat input is little, and is easy to operate, efficient energy-saving easily is automated again, after this welding method soldering distortion very little, insensitive to the fit-up gap, and heat time heating time is short, consume littlely, cost is low, and the thermal treatment zone is narrow, heat more concentrated, heat input is little, and the heat affected area is narrow, and distortion is little after the soldering.But, realizing that the aluminium titanium dissimilar metal connects in the process of moulding, if adopt general arc brazing method, welding process has following shortcoming: the heat radiation of titanium is large, existing equipment is expensive, the production cycle is long.
Adopt general welding method to be difficult to realize efficient, the reliable welding of Ti and Al.For example, liquid welding method can produce compound between a large amount of brittle metals, and the solid welding method again butt joint substantive requirements of form is too harsh.Adopt the method for molten soldering, with the aluminium fusing, it is solid-state that titanium keeps, and can effectively avoid like this forming a large amount of crisp hard intermetallic compounds between the titanium aluminium, can obtain high-intensity joint, compares with Solid-phase welding with melting, has obvious superiority.
Adopt laser as thermal source, have flexible, energy density is high, the hot spot form is adjustable, the heat input series of advantages such as accurately controlled and cooling velocity is fast.But the assembly precision of butt-welding fitting is strict, and equipment cost is higher.
?
Summary of the invention
The present invention provides a kind of welding wire for TIG method welding titanium alloy and pure aluminum plate for solving the deficiency of above-mentioned existing solder technology.
To achieve these goals, the present invention adopts following technical scheme, and the welding wire for TIG method welding titanium alloy and pure aluminum plate of the present invention, the diameter of this alloy welding wire are 2.2-2.8mm, and its mass percent composition is:
Mg：5.2-5.8?%，
Si：0.15-0.25?%，
Fe：0.2-0.3?%，
Cu：0.03-0.04?%，
Cr：0.1-0.2?%，
Zn：0.06-0.09?%，
Mn：0.10-0.15?%，
Ti：0.05-0.15?%，
Surplus is Al;
And welding wire surface scribbles activating agent, and the mass percent component of this activating agent is: SiO
2: 22%; Cr
2O
3: 16%; CaF
2: 2%; TiO
2: 3%; MnCl
2: 21%, all the other are BaCl
2
Titanium alloy and aluminium fusing point differ larger, the present invention utilizes the fusing point difference of titanium and two kinds of mother metals of aluminium, proposition has the welding wire of specific proportioning, it is melted in welding process fill metal and the abundant melt-blended after coagulation formation weld seam of aluminum mother plate, and have obvious fusion area; The formation soldering is connected and the high-melting-point titanium alloy is with the generation interaction of filler wire filling metal, avoid two kinds of metal liquid phase Ti, Al to mix and generate the Ti-Al intermetallic compound of a large amount of fragility, the activating agent of welding wire surface can play the effect that increases welding penetration simultaneously, thereby obtains appearance of weld welding point attractive in appearance, flawless.
The invention has the beneficial effects as follows, the pre-aluminising of not only having avoided relating in the vacuum diffusion welding technique is processed, and has reduced again the welding cost of vacuum environment or lasing condition, and has improved production efficiency, improves joint performance, and is easy to operate.
The specific embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
1) selecting thickness is Ti-6Al-4V titanium alloy sheet to be connected and 1060 pure aluminum plates of 2mm, first titanium alloy sheet face to be connected is processed groove angle and be 35 ° groove;
2) fully polish to remove its surface oxide layer for alloy sheets sand for surface paper to be connected, and clean the mother metal surface with ethanol or acetone, make the roughness of surface to be welded reach Ra 1.8;
3) adopting diameter is the alloy welding wire of 2.2mm, and its mass percent composition is:
Mg：5.2?%，
Si：0.15?%，
Fe：0.2?%，
Cu：0.03?%，
Cr：0.1?%，
Zn：0.06?%，
Mn：0.10?%，
Ti：0.05?%，
Surplus is Al;
4) welding wire is immersed 50%H
2O+50%HNO
3Solution washes post-drying with clear water behind the 15min, polishes with sand paper again;
5) coat activating agent at welding wire surface again, the mass percent component of this activating agent is: SiO
2: 22%; Cr
2O
3: 16%; CaF
2: 2%; TiO
2: 3%; MnCl
2: 21%, all the other are BaCl
2
6) titanium alloy sheet is docked placement with the pure aluminum plate level, the fit-up gap is 0.09mm;
7) first butt-welding fitting just, the back side logical argon shield 8-10min simultaneously, protective gas is purity greater than 99.98% argon gas;
8) adopt the TIG welding that fills silk to carry out the tungsten electrode welding, argon arc welding adopts tungsten-thorium electrode, and the content of tungsten is 99.9%, tungsten electrode diameter 2mm, and the end is taper; Technological parameter is: weldingvoltage 12V, and welding current 105-110A, speed of welding is 70mm/min, argon flow amount is 8-10L/min; In the welding process, keep 75 ° of angles between welding wire and weldment.Welding wire is sent into the molten bath steadily, uniformly along the molten bath front end;
9) after welding finishes, continue logical argon shield 6min.
Resulting Ti-6Al-4V titanium alloy and 1060 pure aluminum plate banjo fixing butt jointing appearances of weld are attractive in appearance.Do not find the microdefects such as crackle, pore through the metallography microscope sem observation, connector area is in conjunction with good.
Embodiment 2:
1) selecting thickness is Ti-6Al-4V titanium alloy sheet to be connected and 1060 pure aluminum plates of 2.5mm, first titanium alloy sheet face to be connected is processed groove angle and be 35-40 ° groove;
2) fully polish to remove its surface oxide layer for alloy sheets sand for surface paper to be connected, and clean the mother metal surface with ethanol or acetone, make the roughness of surface to be welded reach Ra 2.5;
3) adopting diameter is the alloy welding wire of 2.6mm, and its mass percent composition is:
Mg：5.5?%，
Si：0.2?%，
Fe：0.25?%，
Cu：0.033?%，
Cr：0.15?%，
Zn：0.08?%，
Mn：0.12?%，
Ti：0.1?%，
Surplus is Al;
4) welding wire is immersed 50%H
2O+50%HNO
3Solution washes post-drying with clear water behind the 18min, polishes with sand paper again;
5) coat activating agent at welding wire surface again, the mass percent component of this activating agent is: SiO
2: 22%; Cr
2O
3: 16%; CaF
2: 2%; TiO
2: 3%; MnCl
2: 21%, all the other are BaCl
2
6) titanium alloy sheet is docked placement with the pure aluminum plate level, the fit-up gap is 0.1mm;
7) first butt-welding fitting just, the back side logical argon shield 9min simultaneously, protective gas is purity greater than 99.98% argon gas;
8) adopt the TIG welding that fills silk to carry out the tungsten electrode welding, argon arc welding adopts tungsten-thorium electrode, and the content of tungsten is 99.9%, tungsten electrode diameter 2mm, and the end is taper; Technological parameter is: weldingvoltage 12V, and welding current 105-110A, speed of welding is 70mm/min, argon flow amount is 9L/min; In the welding process, keep 75 ° of angles between welding wire and weldment.Welding wire is sent into the molten bath steadily, uniformly along the molten bath front end;
9) after welding finishes, continue logical argon shield 8min.
Resulting Ti-6Al-4V titanium alloy and 1060 pure aluminum plate banjo fixing butt jointing appearances of weld are attractive in appearance.Do not find the microdefects such as crackle, pore through the metallography microscope sem observation, connector area is in conjunction with good.
Embodiment 3:
1) selecting thickness is titanium alloy sheet to be connected and the pure aluminum plate of 3mm, first titanium alloy sheet face to be connected is processed groove angle and be 40 ° groove;
2) fully polish to remove its surface oxide layer for alloy sheets sand for surface paper to be connected, and clean the mother metal surface with ethanol or acetone, make the roughness of surface to be welded reach Ra 3;
3) adopting diameter is the alloy welding wire of 2.8mm, and its mass percent composition is:
Mg：?5.8?%，
Si：?0.25?%，
Fe：0.3?%，
Cu：?0.04?%，
Cr：?0.2?%，
Zn：?0.09?%，
Mn：?0.15?%，
Ti：?0.15?%，
Surplus is Al;
4) welding wire is immersed 50%H
2O+50%HNO
3Solution washes post-drying with clear water behind the 20min, polishes with sand paper again;
5) coat activating agent at welding wire surface again, the mass percent component of this activating agent is: SiO
2: 22%; Cr
2O
3: 16%; CaF
2: 2%; TiO
2: 3%; MnCl
2: 21%, all the other are BaCl
2
6) titanium alloy sheet is docked placement with the pure aluminum plate level, the fit-up gap is 0.11mm;
7) first butt-welding fitting just, the back side logical argon shield 10min simultaneously, protective gas is purity greater than 99.98% argon gas;
8) adopt the TIG welding that fills silk to carry out the tungsten electrode welding, argon arc welding adopts tungsten-thorium electrode, and the content of tungsten is 99.9%, tungsten electrode diameter 2mm, and the end is taper; Technological parameter is: weldingvoltage 12V, and welding current 105-110A, speed of welding is 70mm/min, argon flow amount is 10L/min; In the welding process, keep 75 ° of angles between welding wire and weldment.Welding wire is sent into the molten bath steadily, uniformly along the molten bath front end;
9) after welding finishes, continue logical argon shield 10min.
Resulting Ti-6Al-4V titanium alloy and 1060 pure aluminum plate banjo fixing butt jointing appearances of weld are attractive in appearance.Do not find the microdefects such as crackle, pore through the metallography microscope sem observation, connector area is in conjunction with good.
Claims (1)
1. a welding wire that is used for TIG method welding titanium alloy and pure aluminum plate is characterized in that, the diameter of this alloy welding wire is 2.2-2.8mm, and its mass percent composition is:
Mg：5.2-5.8?%，
Si：0.15-0.25?%，
Fe：0.2-0.3?%，
Cu：0.03-0.04?%，
Cr：0.1-0.2?%，
Zn：0.06-0.09?%，
Mn：0.10-0.15?%，
Ti：0.05-0.15?%，
Surplus is Al;
And welding wire surface scribbles activating agent, and the mass percent component of this activating agent is: SiO
2: 22%; Cr
2O
3: 16%; CaF
2: 2%; TiO
2: 3%; MnCl
2: 21%, all the other are BaCl
2
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476015A (en) * | 2014-10-31 | 2015-04-01 | 天津市宏远钛铁有限公司 | Titanium alloy solder and soldering method thereof |
| CN107803610A (en) * | 2017-10-15 | 2018-03-16 | 西安航空学院 | For welding the welding material and welding method of titanium fine aluminium aluminium alloy compound plate transition zone |
| CN113245749A (en) * | 2021-07-09 | 2021-08-13 | 四川西冶新材料股份有限公司 | Titanium alloy welding wire for arc fuse additive manufacturing and high-performance welding |
| CN114227060A (en) * | 2021-12-27 | 2022-03-25 | 广东凤铝铝业有限公司 | Method for improving welding performance of aluminum profile for new energy automobile |
| CN114393343A (en) * | 2014-01-22 | 2022-04-26 | 伊利诺斯工具制品有限公司 | Aluminum alloy welding consumable and method of metallurgical bonding |
| US11890703B2 (en) | 2010-02-10 | 2024-02-06 | Illinois Tool Works Inc. | Aluminum alloy welding wire |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11890703B2 (en) | 2010-02-10 | 2024-02-06 | Illinois Tool Works Inc. | Aluminum alloy welding wire |
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| CN113245749A (en) * | 2021-07-09 | 2021-08-13 | 四川西冶新材料股份有限公司 | Titanium alloy welding wire for arc fuse additive manufacturing and high-performance welding |
| CN113245749B (en) * | 2021-07-09 | 2021-10-08 | 四川西冶新材料股份有限公司 | Titanium alloy welding wire for arc fuse additive manufacturing and high-performance welding |
| CN114227060A (en) * | 2021-12-27 | 2022-03-25 | 广东凤铝铝业有限公司 | Method for improving welding performance of aluminum profile for new energy automobile |
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Application publication date: 20130424 |