CN103521899A - Welding method for manufacturing composite pipe through composite plate - Google Patents
Welding method for manufacturing composite pipe through composite plate Download PDFInfo
- Publication number
- CN103521899A CN103521899A CN201310500429.2A CN201310500429A CN103521899A CN 103521899 A CN103521899 A CN 103521899A CN 201310500429 A CN201310500429 A CN 201310500429A CN 103521899 A CN103521899 A CN 103521899A
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- China
- Prior art keywords
- welding
- composite
- stainless steel
- plate
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 238000003466 welding Methods 0.000 title claims abstract description 112
- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000010935 stainless steel Substances 0.000 claims abstract description 48
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 48
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052786 argon Inorganic materials 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000002537 cosmetic Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 22
- 238000005253 cladding Methods 0.000 claims description 6
- 238000003032 molecular docking Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 13
- 239000010962 carbon steel Substances 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 2
- 210000001503 Joints Anatomy 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000003889 chemical engineering Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 208000008454 Hyperhidrosis Diseases 0.000 description 2
- 238000009750 centrifugal casting Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000035900 sweating Effects 0.000 description 2
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 231100000078 corrosive Toxicity 0.000 description 1
- 231100001010 corrosive Toxicity 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
- 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
- B23K33/008—Filling of continuous seams for automotive applications
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
- B23K9/0253—Seam welding; Backing means; Inserts for rectilinear seams for the longitudinal seam of tubes
-
- 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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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
Abstract
The invention provides a welding method for manufacturing a composite pipe through a composite plate, and corrosion resistance of the inner wall of the composite pipe is beneficially ensured. The welding method is characterized in that semi-U-shaped grooves with the certain size are machined in the end portions of the two ends of a stainless steel layer of the composite plate, stainless steel materials are surfaced on the grooves, V-shaped grooves with truncated edges are machined in the end portions of the two ends of a carbon steel layer of the surfaced composite plate, the two ends of the composite plate are then curled up and connected in a butt joint mode, layered welding is conducted after point fixing positioning is conducted, argon tungsten-arc welding is selected as backing welding, gas metal arc welding is selected as filling and cosmetic welding, stainless steel welding wires are selected as filling materials of backing welding, and carbon steel welding wires can be selected as filling materials of filling and cosmetic welding. According to the welding method for manufacturing the composite pipe through the composite plate, it can be ensured that the stainless steel layer of the composite pipe is not stained, and the welding method has the advantages of being easy to operate and reliable in performance and is suitable for practical engineering application in the field of oil and gas transmission, chemical engineering and the like.
Description
Technical field
The present invention relates to welding field, be specifically related to a kind of welding method of being prepared multiple tube by composite plate.
Background technology
Along with exploitation of oil-gas field popularization, it is more complicated that the exploitation of oil gas field and transport condition become, the CO containing in oil gas field
2, H
2the corrosive mediums such as S make traditional single aseptic technic and material can not meet the development need of oil gas field.
At present, the composite bimetal pipe of carbon steel inner liner stainless steel is with its good corrosion resistance, and good mechanical performance and relatively low cost, progressively promoted the use of in oil gas field field.Abroad, U.S.'s Gulf of Mexico Fairway Field multiple tube is employed already, and in the oil gas fields such as Russia, multiple tube also has application.Domestic, multiple tube starts application on Tarim Oilfield branch company tooth is breathed out oil field surface gathering and transferring pipe; On long celebrating oil field and Daqing oil field waterflood-transmission line, all there is application.
The method of manufacturing multiple tube mainly contains: multiple tube is produced in drawing, and multiple tube is produced in centrifugal casting, and centrifugal aluminothermy technology is produced multiple tube, and multiple tube is produced in explosive forming, and multiple tube etc. is produced in welding.Drawing composite algorithm is that two kinds of different metal pipe boxes are fitted together, then drawing in mould, and the method forms by plastic deformation mechanical bond, and bond strength is low, and can not produce continuously, and production efficiency is lower.Multiple tube is produced in centrifugal casting and centrifugal aluminothermy technology is produced multiple tube, and higher to equipment requirement, cost is higher.
Domestic butt welding is delivered a child, and to produce the development technique starting of composite bimetal pipe more late, in the process of using, often there will be weld defect, as weld crack, is easily corroded etc. after lack of penetration and welding, and wherein the postwelding problem that is easily corroded is comparatively serious.Because basic unit's carbon steel and inner liner stainless steel layer chemical composition differ greatly, when composite board welding is connected into multiple tube, the carbon in carbon steel layer spreads in stainless steel layer, and stainless steel layer is polluted, reduce stainless steel corrosion resistance, thereby reduced the serviceability of multiple tube.Therefore, how to reduce in welding process medium carbon steel layer carbon and become to diffusion in stainless steel layer the key issue of preparing multiple tube.
Summary of the invention
The object of the present invention is to provide a kind of solder technology of being prepared multiple tube by composite plate, this technology can reduce carbon in carbon steel layer in welding process to the diffusion of stainless steel layer, to improve the corrosion resistance of multiple tube, technique is simple, practical.
For achieving the above object, the present invention realizes by following step:
(1), built-up welding step: process length is the half U-shaped groove (3) that a, radius are r in inner liner stainless steel layer (2) end, two ends of composite plate, make radius r be greater than the thickness t of stainless steel layer, built-up welding stainless steel (4) on groove, overlaying method adopts argon tungsten-arc welding, the thickness of overlay cladding should be greater than radius r, to guarantee that half U-shaped groove (3) is filled;
(2), mechanical processing steps: the band root face V-type butting grooves (5) that adopts machining mode that the two ends end face of composite plate is processed into.
(3), butt welding step: docking is rolled in the composite plate two ends that process; along groove, carry out a fixed bit; solder joint number depends on the length of the multiple tube of preparation; during bottoming first by root face through welding; fill again and cover welding; backing welding is selected argon tungsten-arc welding, for raising the efficiency, is filling and selecting during cosmetic welding welding.
The present invention also has following feature:
1, the length a=4-7mm of half U-shaped groove in described step (), half U-shaped groove radius r=5-8mm, the thickness t=1.2-4mm of composite plate stainless steel layer.
2, the root face length of the double V-groove in described step (two) is 1.5-2.5mm.
3, the packing material in described step (three) is selected and stainless steel material identical in step ().
4, apply cooling provision in described step (three) during argon tungsten-arc welding.
5, the weld deposit process welding parameter in described step () is: adopt direct current 140～200A, speed of welding 2.1～2.7mm/s, wire feed rate 1.1～1.7mm/s, gas flow 8～12L/min; Butt-welding process parameter in step (three) is identical with the weld deposit process welding parameter in step ().
The principle that the present invention improves multiple tube corrosion resistance is, in the stainless steel inner lining layer end of composite plate, process and there is certain size half U-shaped groove, and on groove built-up welding stainless steel material, the Thickness Ratio composite plate stainless steel layer thickness t of overlay cladding is large, double V-groove is processed into in the composite plate carbon steel layer end of heap postwelding, during butt welding, because the stainless steel of built-up welding is kept apart composite plate carbon steel layer and stainless steel layer, and composite plate stainless steel layer is far away apart from welding high-temperature region, thereby the carbon reducing in carbon steel layer spreads to stainless steel layer in welding process, reduced carbon to stainless pollution, guarantee the corrosion resistance of inner liner stainless steel layer.
Invention effect
Advantage of the present invention is:
(1), on composite board end part groove built-up welding stainless steel, the stainless steel of built-up welding is separated composite plate carbon steel layer and stainless steel layer, the carbon that has intercepted carbon steel layer spreads to stainless steel layer, has reduced the pollution of carbon to stainless steel layer, has improved the corrosion resistance of multiple tube.
(2), the stainless steel layer thickness of built-up welding is greater than the thickness of composite plate stainless steel layer, while so also having reduced in welding process location, composite plate both sides, aligns more difficult problem, reduced welding difficulty, and welding operation is easily carried out.
(3), overlay cladding is reserved with enough length, guaranteed that the end of composite plate is away from welding high-temperature region, the carbon that can further reduce carbon steel layer spreads to stainless steel layer.
(4) composite plate, after built-up welding stainless steel is because stainless steel layer is thicker, the weld seam amount of staying in the time of can reducing argon tungsten-arc welding.
(5), the composite plate connection of preparing multiple tube belongs to metallurgical binding, reliability is higher.
Accompanying drawing explanation
Fig. 1 composite board end part processing half U type groove schematic diagram.
Fig. 2 groove built-up welding stainless steel schematic diagram.
The docking double V-groove schematic diagram of Fig. 3 composite plate two ends machining band root face.
The flange welding of Fig. 4 composite plate is connected into multiple tube schematic diagram.
In figure 1, the carbon steel layer of composite plate, 2, the inner liner stainless steel layer of composite plate, 3, half U-shaped groove, 4, stainless steel weld overlays, 5, with the double V-groove of root face, 6, butt weld.
The specific embodiment
Embodiment 1
The object of the present invention is to provide a kind of welding method of being prepared multiple tube by composite plate, its concrete implementation step is:
(1), built-up welding step: in the end, two ends of the inner liner stainless steel layer (2) of composite plate, processing length a is 4mm, the half U-shaped groove (3) that radius r is 5mm, the thickness t that makes r be greater than stainless steel layer is 1.2mm.Built-up welding stainless steel (4) on groove, overlaying method adopts argon tungsten-arc welding, and the thickness of overlay cladding should be greater than the degree of depth r of groove, to guarantee that groove (3) is filled.Welding parameter: adopt direct current 140A, speed of welding 2.1mm/s, wire feed rate 1.1mm/s, gas flow 8/min.
(2), mechanical processing steps: adopt the mode of machining the two ends end face of composite plate to be processed into the double V-groove with root face (5) of docking, root face length is 1.5mm.
(3), butt welding step: docking is rolled in the two ends of the composite plate processing, carry out a fixed bit along groove, solder joint number depends on the length of multiple tube.During backing welding, first by root face through welding, then fill and cover welding, backing welding is selected argon tungsten-arc welding, during bottoming, is guaranteeing on the basis of through welding, and the welding parameter of selection of small, to guarantee lower sweating heat energy input.For raising the efficiency filling and selecting welding during cosmetic welding, at the initial stage of filling, select less welding parameter as far as possible.Butt-welding process parameter is identical with the weld deposit process welding parameter in step ().
Embodiment 2
The object of the present invention is to provide a kind of welding method of being prepared multiple tube by composite plate, its concrete implementation step is:
(1), built-up welding step: in the end, two ends of the inner liner stainless steel layer (2) of composite plate, processing length a is 7mm, the half U-shaped groove (3) that radius r is 8mm, the thickness t that makes the radius r of half U-shaped groove be greater than stainless steel layer is 4mm.At the enterprising windrow weldering of groove stainless steel (4), overlaying method adopts argon tungsten-arc welding, and the thickness of overlay cladding should be greater than the degree of depth r of groove, to guarantee that groove (3) is filled.Welding parameter is: adopt direct current 200A, speed of welding 2.7mm/s, wire feed rate 1.7mm/s, gas flow 12L/min.
(2), mechanical processing steps: adopt the mode of machining that the two ends end face of composite plate is processed into the docking double V-groove (5) with root face, root face length is 2.5mm.
(3), butt welding step: the two ends edge flare by the composite plate processing, along groove, carry out a fixed bit, solder joint number depends on the length of multiple tube.During bottoming, first by root face through welding, then fill and cover welding, backing weld method is selected argon tungsten-arc welding, during bottoming, is guaranteeing on the basis of through welding, and the welding parameter of selection of small, to guarantee lower sweating heat energy input.For raising the efficiency filling and selecting welding during cosmetic welding, at the initial stage of filling, select less welding parameter as far as possible.Butt-welding process parameter is identical with the weld deposit process welding parameter in step ().
Claims (6)
1. by composite plate, prepared a welding method for multiple tube, comprise built-up welding step, mechanical processing steps and butt welding step, it is characterized in that, concrete steps are as follows:
(1), built-up welding step: process length is the half U-shaped groove (3) that a, radius are r in inner liner stainless steel layer (2) end, two ends of composite plate, make radius r be greater than the thickness t of stainless steel layer, built-up welding stainless steel (4) on groove, overlaying method adopts argon tungsten-arc welding, the thickness of overlay cladding should be greater than radius r, to guarantee that half U-shaped groove (3) is filled;
(2), mechanical processing steps: the band root face V-type butting grooves (5) that adopts machining mode that the two ends end face of composite plate is processed into.
(3), butt welding step: docking is rolled in the composite plate two ends that process; along groove, carry out a fixed bit; solder joint number depends on the length of the multiple tube of preparation; during bottoming first by root face through welding; fill again and cover welding; backing welding is selected argon tungsten-arc welding, for raising the efficiency, is filling and selecting during cosmetic welding welding.
2. a kind of welding method of being prepared multiple tube by composite plate according to claim 1, it is characterized in that: the length a=4-7mm of half U-shaped groove in described step (), half U-shaped groove radius r=5-8mm, the thickness t=1.2-4mm of composite plate stainless steel layer.
3. a kind of welding method of being prepared multiple tube by composite plate according to claim 1, is characterized in that: the root face length of the double V-groove in described step (two) is 1.5-2.5mm.
4. a kind of welding method of being prepared multiple tube by composite plate according to claim 1, is characterized in that: the packing material in described step (three) is selected and stainless steel material identical in step ().
5. a kind of welding method of being prepared multiple tube by composite plate according to claim 1, is characterized in that: during the middle argon tungsten-arc welding of described step (three), apply cooling provision.
6. a kind of welding method of being prepared multiple tube by composite plate according to claim 1, it is characterized in that: the weld deposit process welding parameter in described step () is: adopt direct current 140～200A, speed of welding 2.1～2.7mm/s, wire feed rate 1.1～1.7mm/s, gas flow 8～12L/min; Butt-welding process parameter in step (three) is identical with the weld deposit process welding parameter in step ().
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| CN106583951A (en) * | 2016-12-06 | 2017-04-26 | 中石化中原油建工程有限公司 | Large aperture thick wall nickel alloy composite tube butt welding process |
| CN108340129A (en) * | 2018-03-13 | 2018-07-31 | 太原科技大学 | A kind of preparation method of the stainless steel and carbon steel composite tube on the deposited side of easy welding |
| CN109483009A (en) * | 2018-10-31 | 2019-03-19 | 中国石油天然气集团有限公司 | A kind of manufacturing method of composite bimetal pipe end portion treatment structure |
| CN109483009B (en) * | 2018-10-31 | 2021-04-30 | 中国石油天然气集团有限公司 | Manufacturing method of end processing structure of bimetal composite pipe |
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Effective date of registration: 20170418 Address after: 112601 Tieling City, Liaoning province Tieling County Industrial Park Yi Road Park South Ring Road No. third Patentee after: Liaoning Blue New Material Co., Ltd. Address before: 150001 School of materials science and engineering,, Harbin, Nangang, China, Harbin Institute of Technology, Patentee before: Harbin Institute of Technology |