CN103612001A - Bimetal composite pipe end sealing weld technology based on R-shaped groove - Google Patents
Bimetal composite pipe end sealing weld technology based on R-shaped groove Download PDFInfo
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- CN103612001A CN103612001A CN201310681311.4A CN201310681311A CN103612001A CN 103612001 A CN103612001 A CN 103612001A CN 201310681311 A CN201310681311 A CN 201310681311A CN 103612001 A CN103612001 A CN 103612001A
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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
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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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
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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
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
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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
- B23K9/235—Preliminary treatment
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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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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Abstract
The invention discloses a bimetal composite pipe end sealing weld technology based on an R-shaped groove. A sealing weld bimetal composite pipe is composed of a stainless steel lining pipe and a carbon steel base pipe. The technology comprises the first step of machining the R-shaped groove, namely, the R-shaped groove is formed in the carbon steel base pipe end of a bimetal composite pipe to be sealed and welded; the second step of carrying out backing weld, namely, the backing weld is carried out on the joint between a circular arc plane and the stainless steel lining pipe through an argon arc welding machine to form a backing weld layer which is located inside a circular arc section; the third step of carrying out cosmetic welding, namely, under the protection of inert gases, the cosmetic welding is carried out on the outer side of the backing weld layer through the argon arc welding machine to form a cosmetic welding layer, and the upper portion of the cosmetic welding layer is higher than the upper portion of a circular arc transmission section. The sealing weld technology steps are simple, the sealing weld technology process is controlled easily, the welding quality is good, and the problems that an existing bimetal composite pipe end sealing weld method is poor in welding quality, the welded bimetal composite pipe has the quality defect easily can be effectively solved.
Description
Technical field
The invention belongs to composite bimetal pipe welding technology field, especially relate to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove.
Background technology
The composite bimetal pipe being complex as a whole based on detonation complex method is mainly to utilize explosive to produce moment impact ripple, makes stainless steel inner lining tube produce plastic deformation, and carbon steel base tube produces strain simultaneously, finally reaches the machine performance of inside and outside interference laminating.Because detonation is compound, be a kind of mechanical complex method, between carbon steel base tube and stainless steel inner lining tube, have certain physical clearance, so the soldering and sealing of pipe end becomes one of important step of composite bimetal pipe quality tips control.The Main Function of soldering and sealing is: the first, prevent that pollutant from entering the gap between carbon steel base tube and stainless steel inner lining tube from pipe end, affects the quality of composite bimetal pipe; The second, the pipe end of mechanical bimetal multiple tube easily makes stainless steel inner lining tube occur the phenomenons such as distortion, separation in transportation, hoisting process, thereby needs to adopt sealing welding technique for extra to guarantee its integrality; When the second, the existence in gap makes butt welding between carbon steel base tube and stainless steel inner lining tube, easily at gap location, produce pore, the weld defect such as molten, have a strong impact on quality and the efficiency of construction, pipe end soldering and sealing can avoid this class defect to produce when butt welding.
At present, when composite bimetal pipe is carried out to pipe end soldering and sealing, what adopt is soldering and sealing groove as shown in Figure 1, stainless steel inner lining tube stretches out carbon steel base tube pipe end 3mm～3.5mm, carbon steel base tube pipe end is processed into certain angle of inclination according to purchaser's needs, between stainless steel inner lining tube and carbon steel base tube, be directly obtuse angle transition, soldering and sealing directly starts welding at place, summit, obtuse angle, and its soldering and sealing state refers to Fig. 2.The advantage of soldering and sealing groove is as shown in Figure 1: the first, easily processing; The second, welding operation is simple; Three, welding efficiency is high; But following several respects defect of its existence: the first, after welding, at drift angle place, weld seam obtuse angle, be prone to the not molten defect of drift angle, have a strong impact on weldquality; The second, the weld seam after soldering and sealing is exposed in Butt welded seam completely, thereby throat depth is thinner, and follow-up butt welding easily, by soldering and sealing arc burn, occurs mass defect.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned deficiency of the prior art, a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove is provided, its sealing welding technique for extra step is simple, sealing welding technique for extra process easily control and welding quality good, can effectively solve that the weldquality that existing pipe end sealing welding method for composite pipe exists is poor, the composite bimetal pipe that welds is prone to the problems such as mass defect.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, by stainless steel inner lining tube and coaxial package, the carbon steel base tube in stainless steel inner lining tube outside forms the composite bimetal pipe of institute's soldering and sealing, it is characterized in that this technique comprises the following steps:
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, is characterized in that: the angle β between face of slope described in step 1 and the central axis of stainless steel inner lining tube=(90 °-α); In step 1, described R shape groove is added to man-hour, first adopt machining apparatus that carbon steel base tube tube end maching is become to inclined plane, the angle between described inclined plane and stainless steel inner lining tube central axis is β; Afterwards, adopt machining apparatus to be along the circumferential direction processed to form described arc section in the junction between carbon steel base tube pipe end and stainless steel inner lining tube; Then, adopt grinding apparatus to polish to the junction between described arc section top and described inclined plane, and form described circular arc changeover portion.
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, it is characterized in that: the arc radius R2=3mm～4mm of arc section described in step 1, arc radius R1=2mm～the 3mm of described circular arc changeover portion, the length that carbon steel base tube is stretched out in described stainless steel inner lining tube outer end is 4mm～4.5mm, and the height of described arc section is 3mm～5mm.
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, is characterized in that: while carrying out backing welding in step 2, described bottoming layer will all fill up in the described arc section caving inward.
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, is characterized in that: the layer of bottoming described in step 2 is covered completely by the layer of capping described in step 3.
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, it is characterized in that: before carrying out backing welding in step 2, need first adopt firing equipment to treat soldering and sealing composite bimetal pipe pipe end and carry out preheating, and will treat that soldering and sealing composite bimetal pipe pipe end is preheated to 80 ℃～100 ℃.
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, is characterized in that: the junction between the junction between the layer of capping described in step 3 top and carbon steel base tube and capping layer bottom and stainless steel inner lining tube is obtuse angle.
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, is characterized in that: while carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, described argon arc welding machine is TIG Welding Machine, and weldingvoltage is 15V～22V; In step 2, in backing welding process neutralization procedure three in cosmetic welding process, the flow of inert gas used is 15L/min ± 2L/min.
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, is characterized in that: after in step 1, R shape groove machines, also need burr and greasy dirt on described R shape groove to clear up; After in step 3, capping is soldered into, also need to the outer surface of capping layer and capping layer week side stainless steel inner lining tube and the oxide layer on carbon steel base tube outer surface remove; While carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, the stainless steel welding stick that adopts is identical and be and the stainless steel welding stick of stainless steel inner lining tube with material.
Above-mentioned a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, is characterized in that: adopt machining apparatus that carbon steel base tube tube end maching is become behind inclined plane, the length that carbon steel base tube is stretched out in described stainless steel inner lining tube outer end is 2mm～2.5mm; After described arc section machines, the length that carbon steel base tube is stretched out in described stainless steel inner lining tube outer end is 4mm～4.5mm.
The present invention compared with prior art has the following advantages:
1, adopt R shape groove can effectively increase the thickness of soldering and sealing layer, more effectively protect composite bimetal pipe pipe end.
2, strengthened the distance of base lining gap (being the gap between carbon steel base tube and stainless steel inner lining tube) with follow-up butt welding welding bead, in the time of guaranteeing butt welding, can again not be fused to base and serve as a contrast gap and form the defects such as pore.
3, adopt the molten bath of R shape groove energy operative constraint bottoming welding to flow, thereby solve the not molten defect of root.
4, R shape groove type is all unrestricted to the specification of the material of the grade of welding base metal, lining, steel pipe, bevel angle etc., thereby the scope of application is wide.
5, sealing welding technique for extra is simplified and whole sealing welding technique for extra process is easily controlled, and can not burn internal lining pipe, also can not affect the quality of internal lining pipe simultaneously.
6, easy and simple to handle, can reduce soldering and sealing difficulty, convenient construction, and welding cost is low, thereby labor productivity can be improved greatly.
7, solder yield is high, has greatly improved welding quality, has reduced rework rate, and soldering and sealing flaw detection First Pass Yield reaches 100%.
8, in soldering and sealing process, in soldered carbon steel/stainless steel composite pipe pipe, with inert gas, protect, realized the protection in carbon steel/stainless steel composite pipe pipe, avoided the oxidation of stainless steel weld joint, be conducive to the maintenance of decay resistance; And the present invention can effectively be applicable in various sizes carbon steel/stainless steel composite pipe pipe end soldering and sealing processing.
In sum, sealing welding technique for extra step of the present invention is simple, sealing welding technique for extra process easily control and welding quality good, can effectively solve that the weldquality that existing pipe end sealing welding method for composite pipe exists is poor, the composite bimetal pipe that welds is prone to the problems such as mass defect.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of conventional soldering and sealing groove.
Fig. 2 is the soldering and sealing view of conventional soldering and sealing groove.
Fig. 3 is the structural representation of R shape groove of the present invention.
Fig. 3-1 becomes the machining state schematic diagram behind inclined plane for carbon steel base tube tube end maching of the present invention.
Fig. 3-2 are the machining state schematic diagram after carbon steel base tube pipe end arc section of the present invention machines.
Fig. 4 is the soldering and sealing view of R shape groove of the present invention.
Fig. 5 is sealing welding technique for extra FB(flow block) of the present invention.
Description of reference numerals:
1-stainless steel inner lining tube; 2-carbon steel base tube; 3-bottoming layer;
4-capping layer.
The specific embodiment
A kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove as shown in Figure 5, by stainless steel inner lining tube 1 and coaxial package, the carbon steel base tube 2 in stainless steel inner lining tube 1 outside forms the composite bimetal pipe of institute's soldering and sealing, and this technique comprises the following steps:
In the present embodiment, the specification for the treatment of soldering and sealing composite bimetal pipe is the mm of Φ 610 * (20+2), describedly treat that the material of the carbon steel base tube 2 of soldering and sealing composite bimetal pipe is that L485 carbon steel and its wall thickness are 20mm, described in treat that the material of the stainless steel inner lining tube 1 of soldering and sealing composite bimetal pipe is that 316L stainless steel and its wall thickness are 2mm.
Actual man-hour, the arc radius R2=4mm of described arc section, the arc radius R1=3mm of described circular arc changeover portion of adding.The height of described arc section is 5mm.
Angle β between the central axis of face of slope described in step 1 and stainless steel inner lining tube 1=(90 °-α).In the present embodiment, α=24 °, are outwardly circular arc changeover portion between described face of slope and described arc section.The length that carbon steel base tube 2 is stretched out in described stainless steel inner lining tube 1 outer end is 4.5mm, and carbon steel base tube 2 is stretched out for root face in stainless steel inner lining tube 1 outer end.
Actual man-hour, the angle that α requires for purchaser of adding.
In step 1, described R shape groove is added to man-hour, first adopt machining apparatus that carbon steel base tube 2 tube end machings are become to inclined plane, the angle between described inclined plane and stainless steel inner lining tube 1 central axis is β, and concrete machining state refers to Fig. 3-1; Afterwards, adopt machining apparatus to be along the circumferential direction processed to form described arc section in the junction between carbon steel base tube 2 pipe ends and stainless steel inner lining tube 1, concrete machining state refers to Fig. 3-2; Then, adopt grinding apparatus to polish to the junction between described arc section top and described inclined plane, and form described circular arc changeover portion, concrete machining state refers to Fig. 3.
Reality adds man-hour to described arc section, and the arc section that a radius is R2 is dug in employing R shape cutter and the along the circumferential direction junction between carbon steel base tube 2 pipe ends and stainless steel inner lining tube 1, but can not injure stainless steel inner lining tube 1; Finally, adopt grinding apparatus that arc section and inclined plane intersection are polished into the circular arc changeover portion that radius is R1.
In the present embodiment, adopt machining apparatus that carbon steel base tube 2 tube end machings are become behind inclined plane, the length that carbon steel base tube 2 is stretched out in described stainless steel inner lining tube 1 outer end is 2.5mm; After described arc section machines, described stainless steel inner lining tube 1 outer end stretch out carbon steel base tube 2 length (be described arc section bottom with stainless steel inner lining tube 1 between interface point apart from the distance of stainless steel inner lining tube 1 pipe end) be 4.5mm.
In the present embodiment, described machining apparatus is pipe end slope-mouth process equipment, also can adopt numerically controlled lathe to process, and described grinding apparatus is angle grinding machine.
In actual welding process, described machining apparatus also can adopt the process equipment of other type, and described grinding apparatus also can adopt the sanding apparatus of other type.
In the present embodiment, while carrying out backing welding in step 2, described bottoming layer 3 will all fill up in the described arc section caving inward.That is to say, the bed thickness of described bottoming layer 3 is identical with the height of described arc section.
Actual while carrying out backing welding, described bottoming layer 3 can will not fill up in described arc section yet, but requires bottoming welding full, to guarantee the thickness of bottoming layer 3, improves the resistance to corrosion of weld seam, stainless steel inner lining tube 1 weldering can not be leaked simultaneously.
In the present embodiment, while carrying out backing welding, weldingvoltage is 16V.
In the present embodiment, the layer 3 of bottoming described in step 2 is covered completely by the layer of capping described in step 3 (4).
In the present embodiment, carry out cosmetic welding, weldingvoltage is 17V.
In the present embodiment, while carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, the stainless steel welding stick that adopts is identical and be and the stainless steel welding stick of stainless steel inner lining tube 1 with material.And, described stainless steel welding stick is ER309Lmo stainless steel welding stick, while wherein carrying out backing welding in step 2, the diameter of the ER309Lmo stainless steel welding stick that adopts is Φ 1.2mm, and while carrying out cosmetic welding in step 3, the diameter of the ER309Lmo stainless steel welding stick that adopts is Φ 2.0mm.The composition of ER309Lmo stainless steel welding stick is as follows: 0.022%C, and 2.0%Mn, 0.50%Si, 0.011%S, 0.012%P, 23.6%Cr, 13.5%Ni and 2.20%Mo, 0.60%Cu, surplus is iron.
While carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, described argon arc welding machine is TIG Welding Machine, and described inert gas is argon gas.And described TIG Welding Machine is TIG Manual direct current TIG Welding Machine.During actual welding, also can adopt the TIG Welding Machine of other type.
In the present embodiment, after in step 1, R shape groove machines, also need burr and greasy dirt on described R shape groove to clear up.Like this, the impurity that affects welding quality is all removed, can effectively be guaranteed welding quality.
Before carrying out backing welding in step 2, need first adopt firing equipment to treat soldering and sealing composite bimetal pipe pipe end and carry out preheating, and will treat that soldering and sealing composite bimetal pipe pipe end is preheated to 100 ℃.After capping is soldered in step 3, also need the stainless steel inner lining tube 1 of the outer surface of capping layer 4 and 4 weeks sides of capping layer and the oxide layer on carbon steel base tube 2 outer surfaces to remove, make welding bead and groove face light round and smooth.
In the present embodiment, the junction between the junction between the layer of capping described in step 34 tops and carbon steel base tube 2 and capping layer 4 bottoms and stainless steel inner lining tube 1 is obtuse angle.
In the present embodiment, in step 2, in backing welding process neutralization procedure three in cosmetic welding process, the flow of inert gas used is 17L/min.
For checking welding quality, weld and rear welding bead has been permeated to dye penetrant inspection, check surface whether to have the blemish such as face crack; Welding bead is carried out to 100% x-ray inspection, by angle welding, evaluate, evaluation thickness is (3+t) mm, and t is the wall thickness of stainless steel inner lining tube 1; Carry out intercrystalline corrosion check, check position is the lining position (being stainless steel inner lining tube 1) of soldering and sealing welding bead bottom, and thickness is t, and the intercrystalline corrosion at requirement intercepting position meets the requirement of lining material.
In the present embodiment, after having welded, the assay of infiltration dye penetrant inspection is qualified; Welding bead is carried out to 100% x-ray inspection, after evaluating by angle welding, evaluation thickness is 5mm, and film making result I level is qualified; Welding bead is carried out to intercrystalline corrosion check, and check position is the lining position of soldering and sealing welding bead bottom, and evaluation thickness is 2mm, and intercrystalline corrosion result is qualified, after bending, without visible crack, meets the requirement of multiple tube lining to intercrystalline corrosion.
In the present embodiment, as different from Example 1: the specification for the treatment of soldering and sealing composite bimetal pipe is the mm of Φ 114 * (10+3), describedly treat that the material of the carbon steel base tube 2 of soldering and sealing composite bimetal pipe is that L360NS carbon steel and its wall thickness are 10mm, describedly treat that the material of the stainless steel inner lining tube 1 of soldering and sealing composite bimetal pipe is that 825 stainless steels and its wall thickness are 3mm, the arc radius R2=2.5mm of described arc section, the arc radius R1=3.5mm of described circular arc changeover portion, the height of described arc section is 4mm, α=30 °; While carrying out backing welding in step 2, welding current is that 85A and weldingvoltage are 16V; While carrying out cosmetic welding in step 3, welding current is that 110A and weldingvoltage are 17V; While carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, the stainless steel welding stick adopting is 625 welding wires, and wherein the diameter of 625 welding wires that adopt is Φ 1.2mm during backing welding, and the diameter that adopts 625 welding wires during cosmetic welding is Φ 2.0mm; Before carrying out backing welding in step 2, need first adopt firing equipment to treat soldering and sealing composite bimetal pipe pipe end and carry out preheating, and will treat that soldering and sealing composite bimetal pipe pipe end is preheated to 90 ℃.The chemical composition of 625 welding wires is: 0.02%C, and 0.42%Mn, 0.41%Si, 0.010%S, 0.011%P, 22.2%Cr, 64.0%Ni and 8.12%Mo, 2.11%Fe, 0.32%Cu, 0.21%Al, 0.22%Ti, surplus is iron.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, after having welded, the assay of infiltration dye penetrant inspection is qualified; Welding bead is carried out to 100% x-ray inspection, after evaluating by angle welding, evaluation thickness is 6mm, and film making result I level is qualified; Welding bead is carried out to intercrystalline corrosion check, and check position is the lining position of soldering and sealing welding bead bottom, and evaluation thickness is 3mm, and intercrystalline corrosion result is qualified, after bending, without visible crack, meets the requirement of multiple tube lining to intercrystalline corrosion.
In the present embodiment, as different from Example 1: the specification for the treatment of soldering and sealing composite bimetal pipe is the mm of Φ 76 * (7+2), describedly treat that the material of the carbon steel base tube 2 of soldering and sealing composite bimetal pipe is that 20G carbon steel and its wall thickness are 7mm, describedly treat that the material of the stainless steel inner lining tube 1 of soldering and sealing composite bimetal pipe is that 316L stainless steel and its wall thickness are 2mm, the arc radius R2=2mm of described arc section, the arc radius R1=3mm of described circular arc changeover portion, the height of described arc section is 3mm, α=20 °; While carrying out backing welding in step 2, welding current is that 70A and weldingvoltage are 15V; While carrying out cosmetic welding in step 3, welding current is that 90A and weldingvoltage are 15V; While carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, the stainless steel welding stick adopting is stainless steel welding stick HS316L; Described stainless steel welding stick HS316L contains following chemical composition: 0.024%C by weight percentage, and 1.57%Mn, 0.65%Si, 0.001%S, 0.015%P, 18.37%Cr, 11.36%Ni and 2.10%Mo, surplus is iron; Wherein the diameter of the stainless steel welding stick HS316L that adopts is Φ 1.2mm during backing welding, and the diameter that adopts stainless steel welding stick HS316L during cosmetic welding is Φ 2.0mm; Before carrying out backing welding in step 2, need first adopt firing equipment to treat soldering and sealing composite bimetal pipe pipe end and carry out preheating, and will treat that soldering and sealing composite bimetal pipe pipe end is preheated to 80 ℃.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, after having welded, the assay of infiltration dye penetrant inspection is qualified; Welding bead is carried out to 100% x-ray inspection, after evaluating by angle welding, evaluation thickness is 5mm, and film making result I level is qualified; Welding bead is carried out to intercrystalline corrosion check, and check position is the lining position of soldering and sealing welding bead bottom, and evaluation thickness is 2mm, and intercrystalline corrosion result is qualified, after bending, without visible crack, meets the requirement of multiple tube lining to intercrystalline corrosion.
In the present embodiment, as different from Example 1: the specification for the treatment of soldering and sealing composite bimetal pipe is the mm of Φ 168 * (12.7+3), describedly treat that the material of the carbon steel base tube 2 of soldering and sealing composite bimetal pipe is that 20G carbon steel and its wall thickness are 12.7mm, describedly treat that the material of the stainless steel inner lining tube 1 of soldering and sealing composite bimetal pipe is that 316L stainless steel and its wall thickness are 3mm, α=35 °; While carrying out backing welding in step 2, welding current is that 90A and weldingvoltage are 22V; While carrying out cosmetic welding in step 3, welding current is that 110A and weldingvoltage are 22V; While carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, the stainless steel welding stick adopting is stainless steel welding stick HS316L; Described stainless steel welding stick HS316L contains following chemical composition: 0.024%C by weight percentage, and 1.57%Mn, 0.65%Si, 0.001%S, 0.015%P, 18.37%Cr, 11.36%Ni and 2.10%Mo, surplus is iron; Wherein the diameter of the stainless steel welding stick HS316L that adopts is Φ 1.2mm during backing welding, and the diameter that adopts stainless steel welding stick HS316L during cosmetic welding is Φ 2.0mm; Before carrying out backing welding in step 2, need first adopt firing equipment to treat soldering and sealing composite bimetal pipe pipe end and carry out preheating, and will treat that soldering and sealing composite bimetal pipe pipe end is preheated to 85 ℃.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, after having welded, the assay of infiltration dye penetrant inspection is qualified; Welding bead is carried out to 100% x-ray inspection, after evaluating by angle welding, evaluation thickness is 6mm, and film making result I level is qualified; Welding bead is carried out to intercrystalline corrosion check, and check position is the lining position of soldering and sealing welding bead bottom, and evaluation thickness is 3mm, and intercrystalline corrosion result is qualified, after bending, without visible crack, meets the requirement of multiple tube lining to intercrystalline corrosion.
Embodiment 5
In the present embodiment, as different from Example 1: the specification for the treatment of soldering and sealing composite bimetal pipe is the mm of Φ 168 * (12.7+3), describedly treat that the material of the carbon steel base tube 2 of soldering and sealing composite bimetal pipe is that 20G carbon steel and its wall thickness are 12.7mm, describedly treat that the material of the stainless steel inner lining tube 1 of soldering and sealing composite bimetal pipe is that 316L stainless steel and its wall thickness are 3mm, α=35 °; While carrying out backing welding in step 2, adopt automatic argon arc welder to weld, welding current is that 100A and weldingvoltage are 22V; While carrying out cosmetic welding in step 3, adopt automatic argon arc welder to weld, welding current is that 120A and weldingvoltage are 22V; Before carrying out backing welding in step 2, need first adopt firing equipment to treat soldering and sealing composite bimetal pipe pipe end and carry out preheating, and will treat that soldering and sealing composite bimetal pipe pipe end is preheated to 85 ℃.
In the present embodiment, all the other method steps and parameter are all identical with embodiment 1.
In the present embodiment, after having welded, the assay of infiltration dye penetrant inspection is qualified; Welding bead is carried out to 100% x-ray inspection, after evaluating by angle welding, evaluation thickness is 6mm, and film making result I level is qualified; Welding bead is carried out to intercrystalline corrosion check, and check position is the lining position of soldering and sealing welding bead bottom, and evaluation thickness is 3mm, and intercrystalline corrosion result is qualified, after bending, without visible crack, meets the requirement of multiple tube lining to intercrystalline corrosion.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification of above embodiment being done according to the technology of the present invention essence, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. the composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove, by stainless steel inner lining tube (1) and coaxial package, the carbon steel base tube (2) in stainless steel inner lining tube (1) outside forms the composite bimetal pipe of institute's soldering and sealing, it is characterized in that this technique comprises the following steps:
Step 1, the processing of R shape groove: treating carbon steel base tube (2) the tube end maching R shape groove of soldering and sealing composite bimetal pipe; Described R shape groove bottom is that the arc section and its top that cave inward are face of slope, is outwardly circular arc changeover portion between described face of slope and described arc section; The length that carbon steel base tube (2) is stretched out in described stainless steel inner lining tube (1) outer end is not less than 3mm;
Step 2, backing welding: under inert gas shielding, adopt the junction of argon arc welding machine between described arc surface and stainless steel inner lining tube (1) to carry out backing welding, and form bottoming layer (3); Described bottoming layer (3) is positioned at the described arc section caving inward; During backing welding, welding wire used is that stainless steel welding stick and welding current are 70A～100A;
Step 3, cosmetic welding: under inert gas shielding, adopt argon arc welding machine to carry out cosmetic welding in bottoming layer (3) outside, and form capping layer (4); The upper height of described capping layer (4) is higher than the upper height of described circular arc changeover portion; During cosmetic welding, welding wire used is that stainless steel welding stick and welding current are 90A～120A.
2. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove claimed in claim 1, it is characterized in that: the angle β between the central axis of face of slope described in step 1 and stainless steel inner lining tube (1)=(90 °-α); In step 1, described R shape groove is added to man-hour, first adopt machining apparatus that carbon steel base tube (2) tube end maching is become to inclined plane, the angle between described inclined plane and stainless steel inner lining tube (1) central axis is β; Afterwards, adopt machining apparatus to be along the circumferential direction processed to form described arc section in the junction between carbon steel base tube (2) pipe end and stainless steel inner lining tube (1); Then, adopt grinding apparatus to polish to the junction between described arc section top and described inclined plane, and form described circular arc changeover portion.
3. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove described in claim 1 or 2, it is characterized in that: the arc radius R2=3mm～4mm of arc section described in step 1, arc radius R1=2mm～the 3mm of described circular arc changeover portion, the length that carbon steel base tube (2) is stretched out in described stainless steel inner lining tube (1) outer end is 4mm～4.5mm, and the height of described arc section is 3mm～5mm.
4. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove described in claim 1 or 2, it is characterized in that: while carrying out backing welding in step 2, described bottoming layer (3) will all fill up in the described arc section caving inward.
5. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove described in claim 1 or 2, it is characterized in that: the layer of bottoming described in step 2 (3) is covered completely by the layer of capping described in step 3 (4).
6. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove described in claim 1 or 2, it is characterized in that: before carrying out backing welding in step 2, need first adopt firing equipment to treat soldering and sealing composite bimetal pipe pipe end and carry out preheating, and will treat that soldering and sealing composite bimetal pipe pipe end is preheated to 80 ℃～100 ℃.
7. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove described in claim 1 or 2, it is characterized in that: the junction between the junction between the layer of capping described in step 3 (4) top and carbon steel base tube (2) and capping layer (4) bottom and stainless steel inner lining tube (1) is obtuse angle.
8. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove described in claim 1 or 2, it is characterized in that: while carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, described argon arc welding machine is TIG Welding Machine, and weldingvoltage is 15V～22V; In step 2, in backing welding process neutralization procedure three in cosmetic welding process, the flow of inert gas used is 15L/min ± 2L/min.
9. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove described in claim 1 or 2, it is characterized in that: after in step 1, R shape groove machines, also need burr and greasy dirt on described R shape groove to clear up; After in step 3, capping is soldered into, also need the stainless steel inner lining tube (1) of the outer surface of capping layer (4) and all sides of capping layer (4) and the oxide layer on carbon steel base tube (2) outer surface to remove; While carrying out carrying out cosmetic welding in backing welding and step 3 in step 2, the stainless steel welding stick that adopts is identical and be and the stainless steel welding stick of stainless steel inner lining tube (1) with material.
10. according to a kind of composite bimetal pipe pipe end sealing welding technique for extra based on R shape groove claimed in claim 2, it is characterized in that: adopt machining apparatus that carbon steel base tube (2) tube end maching is become behind inclined plane, the length that carbon steel base tube (2) is stretched out in described stainless steel inner lining tube (1) outer end is 2mm～2.5mm; After described arc section machines, the length that carbon steel base tube (2) is stretched out in described stainless steel inner lining tube (1) outer end is 4mm～4.5mm.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197104A (en) * | 2014-08-22 | 2014-12-10 | 西安向阳航天材料股份有限公司 | Double-metal composite tube and manufacturing process thereof |
| CN104625341A (en) * | 2014-12-06 | 2015-05-20 | 常熟市东鑫钢管有限公司 | Composite stainless steel pipe circumferential-weld welding process |
| CN105127685A (en) * | 2015-09-22 | 2015-12-09 | 西安向阳航天材料股份有限公司 | Method for sealing weld of pipe end of mechanical bimetal composite pipe |
| CN105583582A (en) * | 2016-01-22 | 2016-05-18 | 郑州万达重工股份有限公司 | Bi-metal pipeline and pipe fitting beveling method and bi-metal pipeline and pipe fitting assembly |
| CN107191727A (en) * | 2017-05-27 | 2017-09-22 | 延安中海石油工程技术开发有限公司 | A kind of heavy antisepsis elbow bend pipe and preparation method thereof |
| CN111633302A (en) * | 2020-04-27 | 2020-09-08 | 中车青岛四方机车车辆股份有限公司 | Welding method |
| CN112404664A (en) * | 2020-10-21 | 2021-02-26 | 常州蓝翼飞机装备制造有限公司 | Stainless steel helium arc welding process and welding groove structure |
| CN114310020A (en) * | 2021-12-29 | 2022-04-12 | 江苏杰润管业科技有限公司 | Butt welding method and device for large-diameter bimetal composite pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63192567A (en) * | 1987-02-04 | 1988-08-09 | Kubota Ltd | Method for rewelding bimetallic pipe |
| US5240168A (en) * | 1992-08-20 | 1993-08-31 | The Babcock & Wilcox Company | Method for making a composite to carbon steel joint |
| JP2004276035A (en) * | 2003-03-12 | 2004-10-07 | Daido Steel Co Ltd | Welded joint excellent in resistance to caulking of metallic composite pipe |
| CN101100013A (en) * | 2007-07-04 | 2008-01-09 | 中国石油天然气集团公司 | Thin-wall stainless steel double-layer and carbon steel base layer composite tube girth weld welding method |
| CN101462193A (en) * | 2009-01-09 | 2009-06-24 | 中国石油天然气集团公司 | Method for welding thin layer iron nickel base alloy carbon steel composite tube |
| CN103331327A (en) * | 2013-05-27 | 2013-10-02 | 中国石油天然气集团公司 | Bimetal composite pipe girth welding method |
-
2013
- 2013-12-12 CN CN201310681311.4A patent/CN103612001B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63192567A (en) * | 1987-02-04 | 1988-08-09 | Kubota Ltd | Method for rewelding bimetallic pipe |
| US5240168A (en) * | 1992-08-20 | 1993-08-31 | The Babcock & Wilcox Company | Method for making a composite to carbon steel joint |
| JP2004276035A (en) * | 2003-03-12 | 2004-10-07 | Daido Steel Co Ltd | Welded joint excellent in resistance to caulking of metallic composite pipe |
| CN101100013A (en) * | 2007-07-04 | 2008-01-09 | 中国石油天然气集团公司 | Thin-wall stainless steel double-layer and carbon steel base layer composite tube girth weld welding method |
| CN101462193A (en) * | 2009-01-09 | 2009-06-24 | 中国石油天然气集团公司 | Method for welding thin layer iron nickel base alloy carbon steel composite tube |
| CN103331327A (en) * | 2013-05-27 | 2013-10-02 | 中国石油天然气集团公司 | Bimetal composite pipe girth welding method |
Non-Patent Citations (2)
| Title |
|---|
| 田彩刚: ""L245/316L双金属复合管焊接技术"", 《石油工程建设》 * |
| 许爱华等: ""双金属复合管的施工焊接技术"", 《天然气与石油》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197104A (en) * | 2014-08-22 | 2014-12-10 | 西安向阳航天材料股份有限公司 | Double-metal composite tube and manufacturing process thereof |
| CN104197104B (en) * | 2014-08-22 | 2016-07-20 | 西安向阳航天材料股份有限公司 | A kind of composite bimetal pipe and manufacturing process thereof |
| CN104625341A (en) * | 2014-12-06 | 2015-05-20 | 常熟市东鑫钢管有限公司 | Composite stainless steel pipe circumferential-weld welding process |
| CN105127685A (en) * | 2015-09-22 | 2015-12-09 | 西安向阳航天材料股份有限公司 | Method for sealing weld of pipe end of mechanical bimetal composite pipe |
| CN105127685B (en) * | 2015-09-22 | 2017-05-24 | 西安向阳航天材料股份有限公司 | Method for sealing weld of pipe end of mechanical bimetal composite pipe |
| CN105583582A (en) * | 2016-01-22 | 2016-05-18 | 郑州万达重工股份有限公司 | Bi-metal pipeline and pipe fitting beveling method and bi-metal pipeline and pipe fitting assembly |
| CN107191727A (en) * | 2017-05-27 | 2017-09-22 | 延安中海石油工程技术开发有限公司 | A kind of heavy antisepsis elbow bend pipe and preparation method thereof |
| CN111633302A (en) * | 2020-04-27 | 2020-09-08 | 中车青岛四方机车车辆股份有限公司 | Welding method |
| CN112404664A (en) * | 2020-10-21 | 2021-02-26 | 常州蓝翼飞机装备制造有限公司 | Stainless steel helium arc welding process and welding groove structure |
| CN112404664B (en) * | 2020-10-21 | 2023-12-29 | 常州蓝翼飞机装备制造有限公司 | Stainless steel helium arc welding process and welding groove structure |
| CN114310020A (en) * | 2021-12-29 | 2022-04-12 | 江苏杰润管业科技有限公司 | Butt welding method and device for large-diameter bimetal composite pipe |
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