CN103521898A - Unequal-diameter welding butt joint aluminum alloy pipe - Google Patents
Unequal-diameter welding butt joint aluminum alloy pipe Download PDFInfo
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- CN103521898A CN103521898A CN201310464681.2A CN201310464681A CN103521898A CN 103521898 A CN103521898 A CN 103521898A CN 201310464681 A CN201310464681 A CN 201310464681A CN 103521898 A CN103521898 A CN 103521898A
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- pipe joint
- grooved
- welding
- aluminium alloy
- hole
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- 238000003466 welding Methods 0.000 title claims abstract description 83
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 80
- 210000001503 joint Anatomy 0.000 title abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 26
- 239000004411 aluminium Substances 0.000 claims description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- 229910052786 argon Inorganic materials 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 13
- 239000003973 paint Substances 0.000 claims description 13
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 230000003213 activating effect Effects 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 230000035515 penetration Effects 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052721 tungsten Inorganic materials 0.000 claims description 9
- 239000010937 tungsten Substances 0.000 claims description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 229920000742 Cotton Polymers 0.000 claims description 4
- 244000137852 Petrea volubilis Species 0.000 claims description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- 239000013543 active substance Substances 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002932 luster Substances 0.000 claims description 4
- 238000002454 metastable transfer emission spectrometry Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 4
- -1 trifluoro octyl group Chemical group 0.000 claims description 4
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000003556 assay Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
-
- 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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
- B23K2101/08—Tubes finned or ribbed
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
Abstract
The invention relates to an unequal-diameter welding butt joint aluminum alloy pipe. An aluminum alloy pipe joint with the diameter slightly larger than the diameter of the aluminum alloy pipe is machined according to the diameter of the aluminum alloy pipe, the two sides of the aluminum alloy pipe joint are respectively provided with a plurality of groove-type through holes in the circumferential direction, the groove hole center lines of the groove-type through holes are perpendicular to the axis of the aluminum alloy pipe joint, the distances between two adjacent groove-type through holes are larger than or equal to the hole length of each groove-type through hole, then 50-60-degree grooves are formed in the inner surfaces of the two end portions of the aluminum alloy pipe joint in a machined mode, then welding is respectively carried out on the end portions and the positions of the groove-type through holes, partial heat treatment is carried out on the aluminum alloy pipe joint, finally an anticorrosive coating is prepared, and the position of the aluminum alloy pipe joint is coated with the anticorrosive coating. The unequal-diameter welding butt joint aluminum alloy pipe is easy to operate, implement and industrially popularize.
Description
Technical field
The invention belongs to welding technology field, be specially a kind of aluminium alloy pipeline of non-isometrical butt welding.
Background technology
Along with people propose higher requirement to energy-saving and environmental protection, safety, the application of the light-weight high-strength materials such as aluminium alloy obtains extensive concern.Aluminium is a kind of renewable resource, and in the earth's crust, aluminium element content is very abundant, and the recyclable remelting of discarded aluminium and aluminium is not only energy-conservation but also reduce and pollute.Aluminium has seemed into the material of a kind of " never exhausted ", at least can be for mankind considerable time.Simultaneously aluminium and aluminium are again a kind of energy-conservation and energy storage materials, and under the condition of safety and environmental protection, energy-conservation, the energy-storage function of aluminium is much larger than steel and other many materials, so aluminium becomes the critical material of Aero-Space and Modern Traffic transportation lightweight, high speed.Lightweight can make aircraft and spacecraft fly get Geng Gao, faster, farther, can make guided missile beat sooner, farther, more accurate, can make electric automobile zero pollute and run at high speed, can reduce tractive force and save ample resources, make not only safety but also on schedule of means of transport.
Aluminium and aluminium alloy have higher specific strength and thermal conductivity, good corrosion resistance and can keep the good features such as mechanical property at low temperatures, the needs that adapt to modern science and technology and high-new engineering development, become one of important structural material of the industry such as aerospace, chemical industry, communications and transportation.Progress along with solder technology, people have been developed into the multiple aluminum alloy welding connecting structure that can meet various Special use requirements, as space shuttle, spaceship, light-duty vehicle and can conduction, the various Welded products of heat radiation, corrosion-resistant, resistance to ultralow temperature.
Along with the extensive use of aluminium and aluminium alloy, for the solder technology of aluminium and aluminium alloy, also obtained significant progress.Except traditional melting, gas welding, electric resistance welding method, some other welding method (as plasma arc welding (PAW), electron-bombardment welding, vacuum brazing, Laser Welding, friction stir welding, laser-electric arc combined weldering etc.) also can be used for the welding of aluminium and alloy thereof.Tungsten electrode argon-arc welding electric arc flameholding, weldquality is good, and intensity and the plasticity of welding point are high, in industry, obtain a wide range of applications.
Yet, when aluminium and Welded, there are following difficulty and feature:
1, because the chemical activity of aluminium and aluminium alloy is very strong, while adopting traditional welding method welding, in aluminum alloy surface, very easily form oxide-film, and there is infusibility (as the fusing point of alundum (Al2O3) is about 2050 ℃) more, in addition aluminium and aluminium alloy thermal conductivity are strong, and during welding, easy formation does not fuse phenomenon.Because the density of oxide-film is extremely close with the density of aluminium, so also easily form the field trash of weld metal.Meanwhile, oxide-film can absorb usually becomes one of major reason forming weld porosity compared with juicy.
2, in addition, the linear expansion coefficient of aluminium and alloy thereof is large, and thermal conductivity is strong again, during welding, easily produce buckling deformation, tradition melting weld seam makes welded seam of aluminium alloy produce the cast sturcture harmful to performance, and meanwhile, what joint heat affected area produced softens and will greatly reduce its mechanical performance on a large scale.
Summary of the invention
The invention provides a kind of aluminium alloy pipeline of non-isometrical butt welding, its first object is to improve the weld strength of pipe joint and aluminium alloy pipeline, its second object is to improve the softening problem of pipe joint and aluminium alloy pipeline weld, and its 3rd object is to provide corrosion-inhibiting coating to pipe joint.
Technical scheme of the present invention is as follows: a kind of aluminium alloy pipeline of non-isometrical butt welding, described aluminium alloy pipeline is comprised of in the pipe joint of corresponding pipeline aluminium-alloy pipe and the two ends slightly larger in diameter of two different-diameters, two pipelines are socketed in described pipe joint, described pipe joint both sides are along circumferentially offering some grooved through holes, and pipe joint both ends and pipeline and pipe joint grooved through hole and pipeline are respectively by being welded to connect;
And described aluminium alloy pipeline makes as follows:
(1) according to the diameter of two aluminium alloy pipelines to be connected, process two ends slightly larger in diameter in the aluminium alloy pipeline joint of pipe diameter, some grooved through holes are circumferentially opened in edge respectively in both sides in described pipe joint, the slotted eye center line of grooved through hole is vertical with the axis of pipe joint, and the spacing between adjacent two grooved through holes is not less than the hole length of described each grooved through hole; At the both ends of described pipe joint inner surface, process the groove of 50 ~ 60 ° again;
(2) first with acetone, remove pipe joint and aluminium alloy pipeline end surface, grooved through hole hole wall, the greasy dirt in all regions to be welded such as grooved through hole and lower plate composition surface, and then with the above-mentioned region to be welded of sand paper mechanical grinding, till metallic luster is exposed in polishing, finally use clean cotton yarn wiped clean;
(3) both ends of pipe joint are overlapped with aluminium alloy pipeline end to be welded respectively, determine suitable overlap distance, at least make aluminium alloy pipeline end surface cover grooved through hole inner side completely;
(4) prepare the activating agent of aluminum alloy MIG welding seam penetration, its activating agent is by MnCl
2, V
2o
5, SiO
2, and Al
2o
3form, by weight percentage, its component is: MnCl
225-40%, V
2o
510-15%, SiO
230-40%, all the other are Al
2o
3;
(5) first adopt plasma spray to be applied to pipe joint and aluminium alloy pipeline lap-joint the special active agent preparing by above-mentioned design mix, adopt again welding method to weld lap weld place, concrete technology parameter is: welding current 180 ~ 200A, speed of welding 700mm/min, 50 °, welding gun inclination angle, protective gas is the argon gas that purity is greater than 99.98%, argon flow amount 8L/min～16L/min;
(6) adopt again manual tungsten level argon arc welding method in the grooved through hole welding of pipe joint, select ER5183 aluminium welding wire, concrete technology parameter is: running parameter is: welding current 150 ~ 160A, speed of welding 150mm/min, arc length 3mm, angle between welding gun tungsten electrode and weldment is 70 °～85 °, and protective gas is the argon gas that purity is greater than 99.98%, argon flow amount 8L/min～16L/min; Until fill up all grooved through holes;
(7) the pipe joint part after welding is heated to 500 ~ 520 ℃ under nitrogen protection, and is incubated 30 ~ 40min, then put into cold quenching-in water;
(8) again pipe joint is partly heated to 170 ~ 180 ℃, keeps this temperature range naturally cooling after 3 ~ 4 hours, omnidistance under nitrogen protection;
(9) check and clear up all weld seams, guaranteeing face of weld pore-free, crackle, the defect such as lack of penetration;
(10) prepare anticorrosive paint, the dimethyldiethoxysilane of the MTES of 20 weight portions, 5 weight portions and 1.5 gram of ten trifluoro octyl group trimethoxy silane are mixed, the NaOH that adds 1 weight portion after magnetic agitation is even, at room temperature stirring reaction is 16 hours, the water of 3.5 weight portions is slowly added drop-wise in above-mentioned solution, after finishing, be allowed to condition under room temperature and continue reaction 2 hours, obtain colloidal solution; By the nanometer Al of 2 weight portions
2o
3tiO with 0.5 weight portion
2join in the Propylene Glycol of 10 weight portions, adopt ultrasonic wave to disperse, obtain finely dispersed Al
2o
3and TiO
2dispersion liquid, is joined above-mentioned colloidal solution, under room temperature, stirs and obtains anticorrosive paint;
(11) above-mentioned anticorrosive paint is evenly sprayed to each weld of pipe joint.
Preferably, the both sides of described pipe joint are respectively along circumferentially opening 3 grooved through holes.
Preferably, the both sides of described pipe joint are respectively along circumferentially opening 4 grooved through holes.
Preferably, a plurality of grooved through holes of described pipe joint are equidistant.
Compared with prior art, beneficial effect of the present invention is as follows:
First, the present invention circumferentially opens some grooved through holes in edge respectively in the both sides of described pipe joint, except pipe joint and aluminium alloy pipeline lap weld, can also additionally provide welding in grooved through hole, and increase the effective bearing area of lap weld, thereby compare common overlap welding and greatly improved weld strength.
Secondly; the present invention adopts activating agent welding method in pipe joint and aluminium alloy pipeline overlap welding place; by great many of experiments, select suitable proprietary activating agent; the selection of activating agent basic material and composition definite extremely important can play activating agent and nucleating agent effect in MIG weldering welding aluminum alloy process simultaneously.
Then, the present invention especially heat-treats weld heat affected area pipe joint after welding, first pipe joint is heated to quench after 500 ~ 520 ℃ of a period of times, can obtain supersaturated solid solution in the higher heat affected area of alloying element content, again pipe joint is partly heated to 180 ℃ and for a long time insulation and air cooling, make supersaturated solid solution occur to decompose and diffusion-precipitation phase, thereby further strengthen weld alloy strength, effectively improve the softening problem of weld heat affected area.
Finally, because weld zone alloy content is higher and be different from aluminium alloy pipeline and the remainder of aluminium alloy pipeline joint, thereby the present invention additionally sprays proprietary anticorrosive paint again in each weld zone of pipe joint, thereby to weld zone, provide antirust, anti-corrosive to process, further improve performance and increase the service life.
The present invention operates and implements simply, is easy to industry and promotes.
Accompanying drawing explanation
Fig. 1 is pipe joint and the aluminium alloy pipeline position schematic cross-section of overlap joint of the present invention;
Fig. 2 is that the A of Fig. 1 is to view.
Description of reference numerals:
1---aluminium alloy pipeline joint
2---the first aluminium alloy pipeline
3---the second aluminium alloy pipeline (different-diameter)
4---grooved through hole
5---end welding region
The specific embodiment
Below with specific embodiment, the present invention will be further described.
In the present embodiment, mother metal is the aluminium-alloy pipe 2024 of φ 208 * 4mm and the aluminium-alloy pipe 2024 of φ 226 * 4mm, passes through following steps:
(1) according to the size of two aluminium-alloy pipes, process the suitable aluminium alloy pipeline joint of both ends diameter and two aluminium-alloy pipe diameters, 3 equidistant grooved through holes are circumferentially opened in edge respectively in both sides in described pipe joint, the slotted eye center line of grooved through hole is vertical with the axis of pipe joint, and the spacing between adjacent two grooved through holes is not less than the hole length of described each grooved through hole; At the both ends of described pipe joint inner surface, process the groove of 60 ° again;
(2) first with acetone, remove pipe joint and aluminium alloy pipeline end surface, grooved through hole hole wall, the greasy dirt in all regions to be welded such as grooved through hole and lower plate composition surface, and then with the above-mentioned region to be welded of sand paper mechanical grinding, till metallic luster is exposed in polishing, finally use clean cotton yarn wiped clean;
(3) both ends of pipe joint are overlapped with aluminium alloy pipeline end to be welded respectively, determine suitable overlap distance, at least make aluminium alloy pipeline end surface cover grooved through hole inner side completely;
(4) prepare the activating agent of aluminum alloy MIG welding seam penetration, its activating agent is by MnCl
2, V
2o
5, SiO
2, and Al
2o
3form, by weight percentage, its component is: MnCl
240%, V
2o
510%, SiO
230%, all the other are Al
2o
3;
(5) first adopt plasma spray to be applied to pipe joint and aluminium alloy pipeline lap-joint the special active agent preparing by above-mentioned design mix, adopt again welding method to weld lap weld place, concrete technology parameter is: welding current 180A, speed of welding 700mm/min, 50 °, welding gun inclination angle, protective gas is the argon gas that purity is greater than 99.98%, argon flow amount 16L/min;
(6) adopt again manual tungsten level argon arc welding method in the grooved through hole welding of pipe joint, select ER5183 aluminium welding wire, concrete technology parameter is: running parameter is: welding current 150A, speed of welding 150mm/min, arc length 3mm, angle between welding gun tungsten electrode and weldment is 70 °, and protective gas is the argon gas that purity is greater than 99.98%, argon flow amount 16L/min; Until fill up all grooved through holes;
(7) the pipe joint part after welding is heated to 520 ℃ under nitrogen protection, and insulation 30min, then put into cold quenching-in water;
(8) again pipe joint is partly heated to 170 ℃, keeps this temperature range naturally cooling after 4 hours, omnidistance under nitrogen protection;
(9) check and clear up all weld seams, guaranteeing face of weld pore-free, crackle, the defect such as lack of penetration;
(10) prepare anticorrosive paint, the dimethyldiethoxysilane of the MTES of 20 weight portions, 5 weight portions and 1.5 gram of ten trifluoro octyl group trimethoxy silane are mixed, the NaOH that adds 1 weight portion after magnetic agitation is even, at room temperature stirring reaction is 16 hours, the water of 3.5 weight portions is slowly added drop-wise in above-mentioned solution, after finishing, be allowed to condition under room temperature and continue reaction 2 hours, obtain colloidal solution; By the nanometer Al of 2 weight portions
2o
3tiO with 0.5 weight portion
2join in the Propylene Glycol of 10 weight portions, adopt ultrasonic wave to disperse, obtain finely dispersed Al
2o
3and TiO
2dispersion liquid, is joined above-mentioned colloidal solution, under room temperature, stirs and obtains anticorrosive paint;
(11) above-mentioned anticorrosive paint is evenly sprayed to each weld of pipe joint.
To adopting the sample that above welding method obtains to carry out performance test, specific as follows:
(1) weld is carried out to X-ray procedure: the defects such as flawless, lack of penetration, incomplete fusion, without exceeding standard pore, weld seam inherent quality is qualified;
(2) weld zone tensile property check:
At grooved via regions vertical weld direction intercepting tensile sample, carry out tensile strength test, recording sample tensile strength is 139MPa, is greater than the lower limit of mother metal standard code;
Materials tubing through the curved core diameter of 6.6 times of mother metal thickness, and angle of bend reaches 1800, has no crackle, and assay is qualified.
(3) weld zone Hardness Surveillance:
Adopt the hardness of HVA-10A Vickers butt joint to measure, hardness number is evenly distributed, mean value reaches 131HV, and the hardness number (80 ~ 90 HV) much larger than the joint of not heat-treating and heat affected area, illustrates and after local heat treatmet, greatly improved welding joint softened problem.
(4) pipe joint corrosion resistance check:
According to the regulation in GB/T 10125 " artificial atmosphere corrosion test-salt spray test ", pipe joint corrosion, after 36 hours, is led to 1.1Mpa helium, joint, without leakage situation, illustrates that the corrosion resistance of joint is good after testing.
In the present embodiment, mother metal is the aluminium-alloy pipe 2024 of φ 208 * 4mm and the aluminium-alloy pipe 2024 of φ 226 * 4mm, passes through following steps:
(1) according to the size of two aluminium-alloy pipes, process the suitable aluminium alloy pipeline joint of both ends diameter and two aluminium-alloy pipe diameters, 4 equidistant grooved through holes are circumferentially opened in edge respectively in both sides in described pipe joint, the slotted eye center line of grooved through hole is vertical with the axis of pipe joint, and the spacing between adjacent two grooved through holes is not less than the hole length of described each grooved through hole; At the both ends of described pipe joint inner surface, process the groove of 50 ° again;
(2) first with acetone, remove pipe joint and aluminium alloy pipeline end surface, grooved through hole hole wall, the greasy dirt in all regions to be welded such as grooved through hole and lower plate composition surface, and then with the above-mentioned region to be welded of sand paper mechanical grinding, till metallic luster is exposed in polishing, finally use clean cotton yarn wiped clean;
(3) both ends of pipe joint are overlapped with aluminium alloy pipeline end to be welded respectively, determine suitable overlap distance, at least make aluminium alloy pipeline end surface cover grooved through hole inner side completely;
(4) prepare the activating agent of aluminum alloy MIG welding seam penetration, its activating agent is by MnCl
2, V
2o
5, SiO
2, and Al
2o
3form, by weight percentage, its component is: MnCl
225%, V
2o
515%, SiO
240%, all the other are Al
2o
3;
(5) first adopt plasma spray to be applied to pipe joint and aluminium alloy pipeline lap-joint the special active agent preparing by above-mentioned design mix, adopt again welding method to weld lap weld place, concrete technology parameter is: welding current 200A, speed of welding 700mm/min, 50 °, welding gun inclination angle, protective gas is the argon gas that purity is greater than 99.98%, argon flow amount 8L/min;
(6) adopt again manual tungsten level argon arc welding method in the grooved through hole welding of pipe joint, select ER5183 aluminium welding wire, concrete technology parameter is: running parameter is: welding current 160A, speed of welding 150mm/min, arc length 3mm, angle between welding gun tungsten electrode and weldment is 85 °, and protective gas is the argon gas that purity is greater than 99.98%, argon flow amount 8L/min; Until fill up all grooved through holes;
(7) the pipe joint part after welding is heated to 500 ℃ under nitrogen protection, and insulation 40min, then put into cold quenching-in water;
(8) again pipe joint is partly heated to 180 ℃, keeps this temperature range naturally cooling after 3 hours, omnidistance under nitrogen protection;
(9) check and clear up all weld seams, guaranteeing face of weld pore-free, crackle, the defect such as lack of penetration;
(10) prepare anticorrosive paint, the dimethyldiethoxysilane of the MTES of 20 weight portions, 5 weight portions and 1.5 gram of ten trifluoro octyl group trimethoxy silane are mixed, the NaOH that adds 1 weight portion after magnetic agitation is even, at room temperature stirring reaction is 16 hours, the water of 3.5 weight portions is slowly added drop-wise in above-mentioned solution, after finishing, be allowed to condition under room temperature and continue reaction 2 hours, obtain colloidal solution; By the nanometer Al of 2 weight portions
2o
3tiO with 0.5 weight portion
2join in the Propylene Glycol of 10 weight portions, adopt ultrasonic wave to disperse, obtain finely dispersed Al
2o
3and TiO
2dispersion liquid, is joined above-mentioned colloidal solution, under room temperature, stirs and obtains anticorrosive paint;
(11) above-mentioned anticorrosive paint is evenly sprayed to each weld of pipe joint.
To adopting the sample that above welding method obtains to carry out performance test, specific as follows:
(1) weld is carried out to X-ray procedure: the defects such as flawless, lack of penetration, incomplete fusion, without exceeding standard pore, weld seam inherent quality is qualified;
(2) weld zone tensile property check:
At grooved via regions vertical weld direction intercepting tensile sample, carry out tensile strength test, recording sample tensile strength is 136MPa, is greater than the lower limit of mother metal standard code;
Materials tubing through the curved core diameter of 6.6 times of mother metal thickness, and angle of bend reaches 1800, has no crackle, and assay is qualified.
(3) weld zone Hardness Surveillance:
Adopt the hardness of HVA-10A Vickers butt joint to measure, hardness number is evenly distributed, mean value reaches 131HV, and the hardness number (80 ~ 90 HV) much larger than the joint of not heat-treating and heat affected area, illustrates and after local heat treatmet, greatly improved welding joint softened problem.
(4) pipe joint corrosion resistance check:
According to the regulation in GB/T 10125 " artificial atmosphere corrosion test-salt spray test ", pipe joint corrosion, after 48 hours, is led to 1.1Mpa helium, joint, without leakage situation, illustrates that the corrosion resistance of joint is good after testing.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (4)
1. the aluminium alloy pipeline of a non-isometrical butt welding, it is characterized in that, described aluminium alloy pipeline is comprised of in the pipe joint of corresponding pipeline aluminium-alloy pipe and the two ends slightly larger in diameter of two different-diameters, two pipelines are socketed in described pipe joint, described pipe joint both sides are along circumferentially offering some grooved through holes, and pipe joint both ends and pipeline and pipe joint grooved through hole and pipeline are respectively by being welded to connect;
And described aluminium alloy pipeline makes as follows:
(1) according to the diameter of two aluminium alloy pipelines to be connected, process two ends slightly larger in diameter in the aluminium alloy pipeline joint of pipe diameter, some grooved through holes are circumferentially opened in edge respectively in both sides in described pipe joint, the slotted eye center line of grooved through hole is vertical with the axis of pipe joint, and the spacing between adjacent two grooved through holes is not less than the hole length of described each grooved through hole; At the both ends of described pipe joint inner surface, process the groove of 50 ~ 60 ° again;
(2) first with acetone, remove pipe joint and aluminium alloy pipeline end surface, grooved through hole hole wall, the greasy dirt in all regions to be welded such as grooved through hole and lower plate composition surface, and then with the above-mentioned region to be welded of sand paper mechanical grinding, till metallic luster is exposed in polishing, finally use clean cotton yarn wiped clean;
(3) both ends of pipe joint are overlapped with aluminium alloy pipeline end to be welded respectively, determine suitable overlap distance, at least make aluminium alloy pipeline end surface cover grooved through hole inner side completely;
(4) prepare the activating agent of aluminum alloy MIG welding seam penetration, its activating agent is by MnCl
2, V
2o
5, SiO
2, and Al
2o
3form, by weight percentage, its component is: MnCl
225-40%, V
2o
510-15%, SiO
230-40%, all the other are Al
2o
3;
(5) first adopt plasma spray to be applied to pipe joint and aluminium alloy pipeline lap-joint the special active agent preparing by above-mentioned design mix, adopt again welding method to weld lap weld place, concrete technology parameter is: welding current 180 ~ 200A, speed of welding 700mm/min, 50 °, welding gun inclination angle, protective gas is the argon gas that purity is greater than 99.98%, argon flow amount 8L/min～16L/min;
(6) adopt again manual tungsten level argon arc welding method in the grooved through hole welding of pipe joint, select ER5183 aluminium welding wire, concrete technology parameter is: running parameter is: welding current 150 ~ 160A, speed of welding 150mm/min, arc length 3mm, angle between welding gun tungsten electrode and weldment is 70 °～85 °, and protective gas is the argon gas that purity is greater than 99.98%, argon flow amount 8L/min～16L/min; Until fill up all grooved through holes;
(7) the pipe joint part after welding is heated to 500 ~ 520 ℃ under nitrogen protection, and is incubated 30 ~ 40min, then put into cold quenching-in water;
(8) again pipe joint is partly heated to 170 ~ 180 ℃, keeps this temperature range naturally cooling after 3 ~ 4 hours, omnidistance under nitrogen protection;
(9) check and clear up all weld seams, guaranteeing face of weld pore-free, crackle, the defect such as lack of penetration;
(10) prepare anticorrosive paint, the dimethyldiethoxysilane of the MTES of 20 weight portions, 5 weight portions and 1.5 gram of ten trifluoro octyl group trimethoxy silane are mixed, the NaOH that adds 1 weight portion after magnetic agitation is even, at room temperature stirring reaction is 16 hours, the water of 3.5 weight portions is slowly added drop-wise in above-mentioned solution, after finishing, be allowed to condition under room temperature and continue reaction 2 hours, obtain colloidal solution; By the nanometer Al of 2 weight portions
2o
3tiO with 0.5 weight portion
2join in the Propylene Glycol of 10 weight portions, adopt ultrasonic wave to disperse, obtain finely dispersed Al
2o
3and TiO
2dispersion liquid, is joined above-mentioned colloidal solution, under room temperature, stirs and obtains anticorrosive paint;
(11) above-mentioned anticorrosive paint is evenly sprayed to each weld of pipe joint.
2. aluminium alloy pipeline according to claim 1, is characterized in that, the both sides of described pipe joint are respectively along circumferentially opening 3 grooved through holes.
3. according to the aluminium alloy pipeline described in claim 1-2, it is characterized in that, the both sides of described pipe joint are respectively along circumferentially opening 4 grooved through holes.
4. according to the aluminium alloy pipeline described in claim 1-3, it is characterized in that, a plurality of grooved through holes of described pipe joint are equidistant.
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Cited By (4)
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| CN104439642A (en) * | 2014-11-27 | 2015-03-25 | 芜湖中集瑞江汽车有限公司 | Inert gas arc welding technology applicable to aluminum and aluminum alloy plates with thickness ranging from 4 mm to 6 mm |
| CN104858535A (en) * | 2015-05-18 | 2015-08-26 | 上海交通大学 | Connection method for improving strength of overlap joints |
| CN106584036A (en) * | 2016-12-28 | 2017-04-26 | 江苏恒才液压机械制造有限公司 | Welded type seamless tube machining method |
| CN107570839A (en) * | 2017-10-18 | 2018-01-12 | 兰州理工大学 | A kind of copper tungsten dissimilar metal plate electric arc spot welding method |
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|---|---|
| CN103521898B (en) | 2015-11-25 |
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