CN103521899B - A kind of welding method being prepared multiple tube by composite plate - Google Patents

A kind of welding method being prepared multiple tube by composite plate Download PDF

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Publication number
CN103521899B
CN103521899B CN201310500429.2A CN201310500429A CN103521899B CN 103521899 B CN103521899 B CN 103521899B CN 201310500429 A CN201310500429 A CN 201310500429A CN 103521899 B CN103521899 B CN 103521899B
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welding
stainless steel
composite plate
multiple tube
groove
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CN201310500429.2A
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CN103521899A (en
Inventor
吕世雄
姜丽丽
李充
徐永强
王龙江
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Liaoning Blue New Material Co., Ltd.
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Harbin Institute of Technology
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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
    • B23K9/167—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 kind of welding method being prepared multiple tube by composite plate, it is conducive to ensureing multiple tube inwall corrosion resistance.Its main points process the half U-shaped groove with certain size; and on groove built-up welding stainless steel material; the end, composite plate carbon steel layer two ends of heap postwelding is processed the double V-groove of band root face; again docking is rolled at composite plate two ends; layering welding is implemented after some fixed bit; backing welding selects argon tungsten-arc welding; filling and cosmetic welding select welding; stainless steel welding stick selected by backing welding packing material, and filling and cosmetic welding packing material can select carbon steel welding wire.The present invention can ensure that multiple tube stainless steel layer is not contaminated, has simple to operate, and the feature of dependable performance is applicable to the practical engineering application in the field such as oil-gas transportation and chemical industry.

Description

A kind of welding method being prepared multiple tube by composite plate
Technical field
The present invention relates to welding field, be specifically related to a kind of welding method being prepared multiple tube by composite plate.
Background technology
Along with exploitation of oil-gas field popularization, the exploitation of oil gas field and transport condition become more complicated, the CO contained 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. Mexico gulf 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 breathes out oil field ground collector and delivery pipe; Changqing oilfields and Daqing oil field waterflood-transmission line all there is application.
The method manufacturing multiple tube mainly contains: multiple tube is produced in drawing, and multiple tube is produced in centrifugal casting, and centrifugal aluminothermy technology produces multiple tube, and multiple tube is produced in explosive forming, welding production multiple tube etc.Drawing composite algorithm is fitted together by two kinds of different metal pipe boxes, then drawing in a mold, and the method is formed by plastic deformation mechanical bond, and bond strength is low, and can not continuous seepage, and production efficiency is lower.Multiple tube is produced in centrifugal casting and centrifugal aluminothermy technology produces multiple tube, and higher to equipment requirement, cost is higher.
The starting of the domestic development technique to welding production composite bimetal pipe is more late, in the process used, often there will be weld defect, as weld crack, is easily corroded 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, pollutes stainless steel layer, reduce stainless steel corrosion resistance, thus reduce the serviceability of multiple tube.Therefore, how to reduce carbon in welding process medium carbon steel layer to spread in stainless steel layer and become the key issue preparing multiple tube.
Summary of the invention
The object of the present invention is to provide a kind of solder technology being prepared multiple tube by composite plate, this technology can reduce carbon in carbon steel layer to the diffusion of stainless steel layer in welding process, and to improve the corrosion resistance of multiple tube, technique is simple, practical.
For achieving the above object, the present invention is realized by following step:
(1), built-up welding step: process the half U-shaped groove (3) that length is a, radius is r in inner liner stainless steel layer (2) end, two ends of composite plate, radius r is made to 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 ensure that half U-shaped groove (3) is filled;
(2), mechanical processing steps: adopt band root face V-type butting grooves (5) that the two ends end face of composite plate is processed into by machining mode.
(3), butt welding step: docking is rolled at the composite plate two ends processed; a fixed bit is carried out along groove; solder joint number depends on the length of the multiple tube of preparation; first by root face through welding during bottoming; carry out again filling and cover welding; backing welding select argon tungsten-arc welding, for raise the efficiency fill and cosmetic welding time select welding.
The present invention also has following feature:
The length a=4-7mm of half U-shaped groove 1, in described step (), half U-shaped groove radius r=5-8mm, the thickness t=1.2-4mm of composite plate stainless steel layer.
The root face length of the double V-groove 2, in described step (two) is 1.5-2.5mm.
3, the stainless steel material identical with step () selected by the packing material in described step (three).
4, cooling provision is applied during argon tungsten-arc welding in described step (three).
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, process in the stainless steel inner lining layer end of composite plate 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 in the composite plate carbon steel layer end of heap postwelding, during butt welding, because composite plate carbon steel layer and stainless steel layer are kept apart by the stainless steel of built-up welding, and composite plate stainless steel layer is far away apart from welding high-temperature region, thus the carbon in minimizing carbon steel layer spreads to stainless steel layer in welding process, reduce carbon to stainless pollution, ensure the corrosion resistance of inner liner stainless steel layer.
Invention effect
Advantage of the present invention is:
(1), built-up welding stainless steel on composite board end part groove, composite plate carbon steel layer and stainless steel layer are separated by the stainless steel of built-up welding, the carbon having intercepted carbon steel layer spreads to stainless steel layer, reduces the pollution of carbon to stainless steel layer, improves 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, aligns more difficult problem, reduce welding difficulty, welding operation is easily carried out when this also reduces location, composite plate both sides in welding process.
(3), overlay cladding is reserved with enough length, and ensure that the end of composite plate is away from welding high-temperature region, the carbon that can reduce carbon steel layer further spreads to stainless steel layer.
(4) composite plate, after built-up welding stainless steel is thicker due to stainless steel layer, the weld seam amount of staying when can reduce argon tungsten-arc welding.
(5), the composite plate connection of preparing multiple tube belongs to metallurgical binding, and 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, the double V-groove of band root face, 6, butt weld.
Detailed description of the invention
Embodiment 1
The object of the present invention is to provide a kind of welding method being prepared multiple tube by composite plate, its concrete implementation step is:
(1), built-up welding step: processing length a in the end, two ends of the inner liner stainless steel layer (2) of composite plate is 4mm, and radius r is the half U-shaped groove (3) of 5mm, and the thickness t making 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 ensure 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 (5) of the band root face of docking, root face length is 1.5mm.
(3), butt welding step: docking is rolled at the two ends of the composite plate processed, carries out a fixed bit along groove, solder joint number depends on the length of multiple tube.First by root face through welding during backing welding, then carry out filling and cover welding, backing welding selects argon tungsten-arc welding, and during bottoming on the basis ensureing through welding, the welding parameter of selection of small, to ensure lower sweating heat energy input.For raise the efficiency fill and cosmetic welding time select welding, as far as possible select less welding parameter at the initial stage of filling.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 being prepared multiple tube by composite plate, its concrete implementation step is:
(1), built-up welding step: processing length a in the end, two ends of the inner liner stainless steel layer (2) of composite plate is 7mm, radius r is the half U-shaped groove (3) of 8mm, and the thickness t making the radius r of half U-shaped groove be greater than stainless steel layer is 4mm.Enterprising windrow weldering stainless steel (4) of 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 ensure 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 the two ends end face of composite plate to be processed into the docking double V-groove (5) of band root face, root face length is 2.5mm.
(3), butt welding step: by the two ends edge flare of composite plate processed, carry out a fixed bit along groove, solder joint number depends on the length of multiple tube.First by root face through welding during bottoming, then carry out filling and cover welding, backing weld method selects argon tungsten-arc welding, and during bottoming on the basis ensureing through welding, the welding parameter of selection of small, to ensure lower sweating heat energy input.For raise the efficiency fill and cosmetic welding time select welding, as far as possible select less welding parameter at the initial stage of filling.Butt-welding process parameter is identical with the weld deposit process welding parameter in step ().

Claims (1)

1. prepared a welding method for multiple tube by composite plate, 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 the half U-shaped groove (3) that length is a, radius is r in inner liner stainless steel layer (2) end, two ends of composite plate, radius r is made to 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 ensure that half U-shaped groove (3) is filled;
(2), mechanical processing steps: adopt band root face V-type butting grooves (5) that the two ends end face of composite plate is processed into by machining mode;
(3), butt welding step: docking is rolled at the composite plate two ends processed, a fixed bit is carried out along groove, solder joint number depends on the length of the multiple tube of preparation, first by root face through welding during bottoming, carry out again filling and cover welding, backing welding select argon tungsten-arc welding, for raise the efficiency fill and cosmetic welding time select welding;
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;
The root face length of the double V-groove in described step (two) is 1.5-2.5mm;
The stainless steel material identical with step () selected by packing material in described step (three);
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 ().
CN201310500429.2A 2013-10-09 2013-10-09 A kind of welding method being prepared multiple tube by composite plate Active CN103521899B (en)

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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
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
CN113833970A (en) * 2021-10-18 2021-12-24 天津市宁河县隆昌异型轧钢厂 Special-shaped cladding profile
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