CN107538142A - A kind of welding procedure of ERW - Google Patents
A kind of welding procedure of ERW Download PDFInfo
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- CN107538142A CN107538142A CN201610483298.5A CN201610483298A CN107538142A CN 107538142 A CN107538142 A CN 107538142A CN 201610483298 A CN201610483298 A CN 201610483298A CN 107538142 A CN107538142 A CN 107538142A
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Abstract
The invention provides a kind of welding procedure of ERW, it is related to pipeline welding technical field.By the way that roll of steel plate is welded into the ERW with five layers, comprise the following steps：It is in curly steel plate that the steel plate is made into retaining wall on slope to obtain；Tack welding is grouped to the curly steel plate, to form the matrix of the ERW；Back welding, interior weldering filling weldering, interior weldering cosmetic welding, outside weld filling weldering and outside weld cosmetic welding are carried out successively to the matrix of the ERW, you can obtain the ERW with five layers.
Description
Technical field
The present invention relates to pipeline welding technical field, more particularly to a kind of welding procedure of ERW.
Background technology
A691 Gr11 CL2 alloy pipes are American Society Testing and Materials's material (American Society for
Testing and Materials, ASTM), category 1.25Cr-0.5Mo systems pearlite heatproof steel, the country is with its similar material
14Cr1Mo (chrome molybdenum heat resisting steel), the material have good elevated temperature strength, inoxidizability and sulfuration resistant less than less than 500 DEG C
Thing corrosivity, it is widely used in coal chemical industry, petrochemical industry high-temperature and pressure pipeline, container and reactors for synthesis of ammonia, hydrogenation reaction
In the devices such as device.
At present, the welding of chrome molybdenum steel conduit also uses the welding method of traditional manual argon arc welding bottoming, SMAW
Fill capping.However, the welding job amount of the conventional method is big, and weld job time length, the big low production efficiency of labor intensity, together
When welding quality it is undesirable, weldment qualification rate is low, many defects be present.
The content of the invention
It is an object of the invention to provide a kind of welding procedure of ERW, and it is used to prepare the conjunction of chrome-molybdenum steel HTHP
Gold solder pipe.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of welding procedure of ERW, by the way that roll of steel plate is welded into the ERW with five layers, including
Following steps：
Step S1, it is in curly steel plate the steel plate to be made into retaining wall on slope to obtain；
Step S2, tack welding is grouped to the curly steel plate, to form the matrix of the ERW；
Step S3, back welding is carried out to the matrix of the ERW, to obtain the ERW with the first layer；
Step S4, interior weldering filling weldering is carried out to the ERW with the first layer, there is the second layer to obtain
ERW；
Step S5, interior weldering cosmetic welding is carried out to the ERW with the second layer, there is the 3rd layer to obtain
ERW；
Step S6, outside weld filling weldering is carried out to the ERW with the 3rd layer, there is the 4th layer to obtain
ERW；
Step S7, outside weld cosmetic welding is carried out to the ERW with the 4th layer, there is the 5th layer to obtain
ERW, the ERW with the 5th layer is the ERW with five layers.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement：
Alternatively, before tack welding is grouped, the pre-heat treatment need to be carried out to the curly steel plate, wherein, institute
The heat range for stating the pre-heat treatment be on the basis of groove center line, both sides respectively not less than the steel plate wall thickness three times and not
Less than 100mm, while to being incubated in 100mm outside the heat range；
The pre-heat treatment is preheated using tracklayer heater or flame device, and the temperature of the preheating is more than 200 DEG C.
Alternatively, in the step S2, group is more than 20mm to the length of tack welding, and group is more than to the spacing of tack welding
200mm。
Alternatively, before step S1 is carried out, removing surface need to be carried out to the steel plate, the removing surface is will be described
Groove face and its greasy dirt, oxide and corrosion in edge 50mm are removed clean.
Alternatively, the removing surface is specifically to use electric angle grinder by the corrosion on the steel plate and oxide cmp
Polishing is clean, the steel plate is exposed metallic luster, then remove the greasy dirt on the steel plate with acetone soln.
Alternatively, in the step S3, the back welding uses gas metal-arc welding, and power supply uses dc source
Reversal connection, gage of wire 1.2mm, welding current are 150A~190A, and weldingvoltage is 22V~28V, speed of welding 36cm/
Min~43cm/min；
In the step S4, the interior weldering filling weldering uses Lincoln weld, and power supply uses dc source reversal connection, welding wire
A diameter of 4.0mm, welding current are 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/
min；
In the step S5, the interior weldering cosmetic welding uses Lincoln weld, and power supply uses dc source reversal connection, welding wire
A diameter of 4.0mm, welding current are 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/
min；
In the step S6, the outside weld filling weldering uses Lincoln weld, and power supply uses dc source reversal connection, welding wire
A diameter of 4.0mm, welding current are 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/
min；
In the step S7, the outside weld cosmetic welding uses Lincoln weld, and power supply uses dc source reversal connection, welding wire
A diameter of 4.0mm, welding current are 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/
min。
Alternatively, in step s 6, need to carry out back chipping processing before the outside weld cosmetic welding, the back chipping processing is specific
It is by the weld seam removal of first layer.
Alternatively, temperature difference during welding between adjacent layer is controlled at 200 DEG C -250 DEG C.
Alternatively, in step S3-S7, need to carry out dehydrogenation immediately after the completion of each step, the dehydrogenation tool
Body is the rear heat carried out at 250 DEG C -300 DEG C 30 minutes, is then incubated slow cooling.
Alternatively, after the completion of step S7, post weld heat treatment, institute need to be carried out to the ERW with five layers
It is there is the ERW of five layers to be placed at 640 DEG C -660 DEG C be incubated 1 hour by described to state post weld heat treatment.
Beneficial effects of the present invention：
1. the welding manner that the present invention is combined using filling weldering and cosmetic welding, makes appearance of weld attractive in appearance, appearance of weld matter
Measure, be not in the weld defects such as crackle, stomata, slag inclusion in forming welding tube, while also avoid weldment in welding process and fly
Splash or situation that weldment is lack of penetration；
2. the welding procedure of the present invention can make solder yield reach 100%, speed of welding is also than very fast, welding production
Efficiency high；
3. the welding procedure of the present invention can eliminate welding residual stress, the mechanical performance of welding point is improved, prevents from welding
Pipe deforms.
Brief description of the drawings
Fig. 1 is the flow chart of the welding procedure of the ERW of the embodiment of the present invention；
Fig. 2 is the structural representation of the welding tractor of the embodiment of the present invention；
Fig. 3 is the structural representation of the ERW of the embodiment of the present invention；
Fig. 4 is the cross-sectional view of the weld seam of ERW shown in Fig. 3.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
The welding manner that the present invention is combined using filling weldering and cosmetic welding, makes appearance of weld attractive in appearance, quality of weld seam molding
It is good, be not in the weld defects such as crackle, stomata, slag inclusion in forming welding tube, while also avoid weldment in welding process and splash
Or the situation that weldment is lack of penetration；
The welding procedure of the present invention can make solder yield reach 100%, and speed of welding is also than very fast, welding production effect
Rate is high；
The welding procedure of the present invention can eliminate welding residual stress, improve the mechanical performance of welding point, prevent welded tube
Deformation.
Fig. 1 is the flow chart of the welding procedure of the ERW 1 of the embodiment of the present invention.Referring to Fig. 1, the invention provides one
The welding procedure of kind ERW 1, by the way that roll of steel plate is welded into the ERW 1 with five layers, comprises the following steps：
Step S1, it is in curly steel plate the steel plate to be made into retaining wall on slope to obtain；
Step S2, tack welding is grouped to the curly steel plate, to form the matrix of the ERW 1；
Step S3, back welding is carried out to the matrix of the ERW 1, to obtain the ERW with the first layer 7
1；
Step S4, interior weldering filling weldering is carried out to the ERW 1 with the first layer 7, there is the second weldering to obtain
The ERW 1 of layer 8；
Step S5, interior weldering cosmetic welding is carried out to the ERW 1 with the second layer 8, there is the 3rd weldering to obtain
The ERW 1 of layer 9；
Step S6, outside weld filling weldering is carried out to the ERW 1 with the 3rd layer 9, there is the 4th weldering to obtain
The ERW 1 of layer 10；
Step S7, outside weld cosmetic welding is carried out to the ERW 1 with the 4th layer 10, there is the 5th weldering to obtain
The ERW 1 of layer 11, the ERW 1 with the 5th layer 11 are the ERW 1 with five layers.
Before step S1 is carried out, removing surface need to be carried out to the steel plate, the removing surface is by the groove table
Face and its greasy dirt, oxide and corrosion in edge 50mm are removed clean.
Wherein, the removing surface is specifically and is played the corrosion on the steel plate and oxide cmp using electric angle grinder
Mill is clean, the steel plate is exposed metallic luster, then remove the greasy dirt on the steel plate with acetone soln.
Then, it is in curly steel plate the steel plate to be made into retaining wall on slope to obtain.Also need to the curly steel
Plate carries out the pre-heat treatment, wherein, the heat range of the pre-heat treatment is on the basis of groove center line, and both sides are respectively not less than institute
State the three times of the wall thickness of steel plate and be not less than 100mm, while to being incubated in 100mm outside the heat range；
Wherein, the pre-heat treatment is preheated using tracklayer heater or flame device, and the temperature of the preheating is more than
200℃。
In the step S2, group be to tack welding by curly steel plate in the form of docking in curly steel plate
Welding is segmented on butt joint edge, the weld seam 6 that can be formed in follow-up welding job.Group is more than 20mm to the length of tack welding,
Group is more than 200mm to the spacing of tack welding.
In the step S3, the back welding uses gas metal-arc welding, and power supply uses dc source reversal connection, weldering
The a diameter of 1.2mm of silk, welding current be 150A~190A, and weldingvoltage is 22V~28V, speed of welding for 36cm/min~
43cm/min.Back welding is to carry out back welding to weld seam 6 on the basis of group is to tack welding, can so eliminate butt weld
Gap, provide to ensure for the quality of welding inner portion hereafter.
In the step S4, the interior weldering filling weldering uses Lincoln weld, and power supply uses dc source reversal connection, welding wire
A diameter of 4.0mm, welding current are 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/
min.Interior weldering packed layer is to be carried out from the inside of ERW 1 on the basis of back welding.
In the step S5, the interior weldering cosmetic welding uses Lincoln weld, and power supply uses dc source reversal connection, welding wire
A diameter of 4.0mm, welding current are 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/
min.Interior weldering cosmetic welding is also to be carried out including the inside of ERW 1 on the basis of weldering cosmetic welding.
In the step S6, the outside weld filling weldering uses Lincoln weld, and power supply uses dc source reversal connection, welding wire
A diameter of 4.0mm, welding current are 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/
min.Outside weld filling weldering is what is carried out from the outside of ERW 1 on the basis of back welding.Also, interior weldering filling weldering and outside weld
Filling weldering is symmetrical relative to weld seam.
In the step S7, the outside weld cosmetic welding uses Lincoln weld, and power supply uses dc source reversal connection, welding wire
A diameter of 4.0mm, welding current are 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/
min.Outside weld cosmetic welding is to be carried out from the outside of ERW 1 on the basis of outside weld filling weldering.Also, it is interior weldering cosmetic welding with
Outside weld cosmetic welding is symmetrical relative to weld seam.
Alternatively, in step s 6, need to carry out back chipping processing before the outside weld cosmetic welding, the back chipping processing is specific
It is to remove the weld seam 6 of first layer 7.
Alternatively, temperature difference during welding between adjacent layer is controlled at 200 DEG C -250 DEG C.
Alternatively, in step S3-S7, need to carry out dehydrogenation immediately after the completion of each step, the dehydrogenation tool
Body is the rear heat carried out at 250 DEG C -300 DEG C 30 minutes, is then incubated slow cooling.
Alternatively, after the completion of step S7, post weld heat treatment need to be carried out to the ERW 1 with five layers,
The post weld heat treatment is there is the ERW 1 of five layers to be placed at 640 DEG C -660 DEG C be incubated 1 hour by described.
In three preferred embodiments of the present invention, using A387 chrome molybdenums steel plate as mother metal, wherein, A387 is high-temperature high-pressure
Force container steel plate, tensile strength are 415~585MPa, and manufacture grade is CL22.The present embodiment uses welding tractor 2 as welding
Equipment, prepare the chrome-molybdenum steel HTHP alloy ERW 1 that specification is 914 × 15mm of φ.
Fig. 2 is the structural representation of the welding tractor 2 of the preferred embodiment of the present invention.Referring to Fig. 2, in addition to welding bars and branch
Seat 5, ERW 1 is securely fitted on welding tractor 2 and can moved with welding tractor 2, and plumb joint 3 is fixedly mounted on weldering
One end of extension bar, welding bars accept plumb joint 3 by the bearing 5 fixed on the ground, and the other end of welding bars is equipped with counterweight
Block 4, to ensure the stabilization of plumb joint 3.
The embodiment of the present invention carries out being welded for ERW by welding tractor, substantially increases operating efficiency, and
Improve the quality of ERW.
Fig. 3 is the structural representation of the ERW 1 of the embodiment of the present invention.Referring to Fig. 3, ERW 1 has a straight line
The weld seam 6 of type.
Fig. 4 is the cross-sectional view of the weld seam 6 of ERW 1 shown in Fig. 3.Referring to Fig. 4, carried out first at weld seam 6
One layer of back welding, that is, realize the welding of the first layer 7.Then, interior weldering is carried out to the ERW 1, plumb joint 3 is put in directly
Inside seam welded tube 1, mobile welding tractor 2 realizes the welding of the second layer 8 and the 3rd layer 9.Then the ERW 1 is entered
Row outside weld, directly plumb joint 3 is placed at the weld seam 6 of ERW 1, mobile welding tractor 2 realizes the 4th layer 10 and the 5th
The welding of layer 11.
Three embodiments are different for welding process parameter below, and welding process is carried out in the following order referring to Fig. 1.
Embodiment 1
A. removing surface.Removing surface to steel is by the greasy dirt in the groove face and its edge 50mm, oxidation
Thing and corrosion are removed clean.Specifically, removing surface is to use electric angle grinder by the corrosion on the steel plate and oxide
Polishing grinding is clean, the steel plate is exposed metallic luster, then remove the greasy dirt on the steel plate with acetone soln.
B. retaining wall on slope.It is in curly steel plate that the steel plate is made into retaining wall on slope to obtain.
C. the pre-heat treatment.The pre-heat treatment is carried out to the curly steel plate, wherein, the heat range of the pre-heat treatment
It is on the basis of groove center line, both sides are respectively not less than the three times of the wall thickness of the steel plate and are not less than 100mm, while to described
It is incubated outside heat range in 100mm.
The pre-heat treatment is preheated using tracklayer heater or flame device, and the temperature of the preheating is more than 200 DEG C.
D. group is to tack welding.Tack welding is grouped to the curly steel plate, to form the base of the ERW 1
Body.
Group is more than 20mm to the length of tack welding, and group is more than 200mm to the spacing of tack welding.
E. back welding.Back welding is carried out to the matrix of the ERW 1, to obtain the straight weld with the first layer 7
Pipe 1.The back welding uses gas metal-arc welding (GMAW), and power supply uses dc source reversal connection (DCEP), welding wire model
For ER55-B2, gage of wire 1.2mm, welding current 150A, weldingvoltage 22V, speed of welding 36cm/min.
Dehydrogenation is carried out to the ERW 1 with the first layer 7, the dehydrogenation is specifically at 250 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
The gap of butt weld 6 can be eliminated by carrying out back welding, and guarantee is provided for the interior weldering of Lincoln weld hereafter
Quality.
F. interior weldering filling weldering.Interior weldering filling weldering is carried out to the ERW 1 with the first layer 7, to be had
The ERW 1 of second layer 8.The interior weldering filling weldering uses Lincoln weld (SAW), and power supply uses dc source reversal connection
(DCEP), the welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 405A,
Weldingvoltage is 30V, speed of welding 26cm/min.
Dehydrogenation is carried out to the ERW 1 with the second layer 8, the dehydrogenation is specifically at 250 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
G. interior weldering cosmetic welding.Interior weldering cosmetic welding is carried out to the ERW 1 with the second layer 8, to be had
The ERW 1 of 3rd layer 9.The interior weldering cosmetic welding uses Lincoln weld (SAW), and power supply uses dc source reversal connection
(DCEP), the welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 405A,
Weldingvoltage is 30V, speed of welding 26cm/min.
Dehydrogenation is carried out to the ERW 1 with the 3rd layer 9, the dehydrogenation is specifically at 250 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
H. outside weld filling weldering.The ERW 1 with the 3rd layer 9 is carried out, there is the 4th layer 10 to obtain
ERW 1.Need to carry out back chipping processing before the outside weld cosmetic welding, the back chipping processing is specifically to weld described first
The weld seam 6 of layer 7 removes.The outside weld filling weldering uses Lincoln weld (SAW), and power supply uses dc source reversal connection (DCEP),
The welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 405A, weldingvoltage
For 30V, speed of welding 26cm/min.
Dehydrogenation is carried out to the ERW 1 with the 4th layer 10, the dehydrogenation is specifically at 250 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
I. outside weld cosmetic welding.Outside weld cosmetic welding is carried out to the ERW 1 with the 4th layer 10, to be had
The ERW 1 of 5th layer 11, the ERW 1 with the 5th layer 11 are the vertical masonry joint with five layers
Welded tube 1.The outside weld cosmetic welding uses Lincoln weld (SAW), and power supply uses dc source reversal connection (DCEP), and the welding wire trade mark is
H08CrMoVA, gage of wire 4.0mm, the solder flux trade mark are SJ101-G, welding current 405A, weldingvoltage 30V, are welded
Speed is 26cm/min.
Dehydrogenation is carried out to the ERW 1 with five layers, the dehydrogenation is specifically at 250 DEG C
The rear heat of 30 minutes is carried out, is then incubated slow cooling.
It should be noted that, it is necessary to which the temperature difference between adjacent layer is controlled at 200 DEG C during welding.Control
Interlayer temperature is to form the effusion of hardened structure and influence diffusible hydrogen to prevent cooling rate too fast.
Welding point such as finds that weld defect must carry out repair welding, repair welding uses SMAW through nondestructiving inspecting test
(SMAW), type of electrode R307H, core diameter 3.2mm, power supply use dc source reversal connection (DCEP), and welding current is
94A, weldingvoltage 22V, speed of welding 8cm/min, the temperature control of interpass is between 200 DEG C.Using welding rod arc soldering
Weldering can be in Rapid-Repair welding point tiny flaw, especially suitable for producing and the repairing of job site.
Finally, post weld heat treatment need to be carried out to the ERW 1 with five layers, the post weld heat treatment is will
Described there is the ERW 1 of five layers to be placed at 640 DEG C be incubated 1 hour.Post weld heat treatment is remaining in order to eliminate welding
Stress, the mechanical performance of welding point is improved, prevents welded tube from deforming.
Embodiment 2
A. removing surface.Removing surface to steel is by the greasy dirt in the groove face and its edge 50mm, oxidation
Thing and corrosion are removed clean.Specifically, removing surface is to use electric angle grinder by the corrosion on the steel plate and oxide
Polishing grinding is clean, the steel plate is exposed metallic luster, then remove the greasy dirt on the steel plate with acetone soln.
B. retaining wall on slope.It is in curly steel plate that the steel plate is made into retaining wall on slope to obtain.
C. the pre-heat treatment.The pre-heat treatment is carried out to the curly steel plate, wherein, the heat range of the pre-heat treatment
It is on the basis of groove center line, both sides are respectively not less than the three times of the wall thickness of the steel plate and are not less than 100mm, while to described
It is incubated outside heat range in 100mm.
The pre-heat treatment is preheated using tracklayer heater or flame device, and the temperature of the preheating is more than 200 DEG C.
D. group is to tack welding.Tack welding is grouped to the curly steel plate, to form the base of the ERW 1
Body.
Group is more than 20mm to the length of tack welding, and group is more than 200mm to the spacing of tack welding.
E. back welding.Back welding is carried out to the matrix of the ERW 1, to obtain the straight weld with the first layer 7
Pipe 1.The back welding uses gas metal-arc welding (GMAW), and power supply uses dc source reversal connection (DCEP), welding wire model
For ER55-B2, gage of wire 1.2mm, welding current 190A, weldingvoltage 28V, speed of welding 43cm/min.
Carry out dehydrogenation to the ERW 1 with the first layer 7, the dehydrogenation be specifically 250 DEG C-
The rear heat of 30 minutes is carried out at 300 DEG C, is then incubated slow cooling.
The gap of butt weld 6 can be eliminated by carrying out back welding, and guarantee is provided for the interior weldering of Lincoln weld hereafter
Quality.
F. interior weldering filling weldering.Interior weldering filling weldering is carried out to the ERW 1 with the first layer 7, to be had
The ERW 1 of second layer 8.The interior weldering filling weldering uses Lincoln weld (SAW), and power supply uses dc source reversal connection
(DCEP), the welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 495A,
Weldingvoltage is 34V, speed of welding 34cm/min.
Dehydrogenation is carried out to the ERW 1 with the second layer 8, the dehydrogenation is specifically at 300 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
G. interior weldering cosmetic welding.Interior weldering cosmetic welding is carried out to the ERW 1 with the second layer 8, to be had
The ERW 1 of 3rd layer 9.The interior weldering cosmetic welding uses Lincoln weld (SAW), and power supply uses dc source reversal connection
(DCEP), the welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 495A,
Weldingvoltage is 34V, speed of welding 34cm/min.
Dehydrogenation is carried out to the ERW 1 with the 3rd layer 9, the dehydrogenation is specifically at 300 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
H. outside weld filling weldering.The ERW 1 with the 3rd layer 9 is carried out, there is the 4th layer 10 to obtain
ERW 1.Need to carry out back chipping processing before the outside weld cosmetic welding, the back chipping processing is specifically to weld described first
The weld seam 6 of layer 7 removes.The outside weld filling weldering uses Lincoln weld (SAW), and power supply uses dc source reversal connection (DCEP),
The welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 495A, weldingvoltage
For 34V, speed of welding 34cm/min.
Dehydrogenation is carried out to the ERW 1 with the 4th layer 10, the dehydrogenation is specifically at 300 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
I. outside weld cosmetic welding.Outside weld cosmetic welding is carried out to the ERW 1 with the 4th layer 10, to be had
The ERW 1 of 5th layer 11, the ERW 1 with the 5th layer 11 are the vertical masonry joint with five layers
Welded tube 1.The outside weld cosmetic welding uses Lincoln weld (SAW), and power supply uses dc source reversal connection (DCEP), and the welding wire trade mark is
H08CrMoVA, gage of wire 4.0mm, the solder flux trade mark are SJ101-G, welding current 495A, weldingvoltage 34V, are welded
Speed is 34cm/min.
Dehydrogenation is carried out to the ERW 1 with five layers, the dehydrogenation is specifically at 300 DEG C
The rear heat of 30 minutes is carried out, is then incubated slow cooling.
It should be noted that, it is necessary to which the temperature difference between adjacent layer is controlled at 250 DEG C during welding.Control
Interlayer temperature is to form the effusion of hardened structure and influence diffusible hydrogen to prevent cooling rate too fast.
Welding point such as finds that weld defect must carry out repair welding, repair welding uses SMAW through nondestructiving inspecting test
(SMAW), type of electrode R307H, core diameter are 3.2 or 4.0mm, and power supply uses dc source reversal connection (DCEP), welding electricity
Flow for 184A, weldingvoltage 26V, speed of welding 12cm/min, the temperature control of interpass is between 250 DEG C.Using welding rod
Arc welding repair welding can be in Rapid-Repair welding point tiny flaw, especially suitable for producing and the repairing of job site.
Finally, post weld heat treatment need to be carried out to the ERW 1 with five layers, the post weld heat treatment is will
Described there is the ERW 1 of five layers to be placed at 660 DEG C be incubated 1 hour.Post weld heat treatment is remaining in order to eliminate welding
Stress, the mechanical performance of welding point is improved, prevents welded tube from deforming.
Embodiment 3
A. removing surface.Removing surface to steel is by the greasy dirt in the groove face and its edge 50mm, oxidation
Thing and corrosion are removed clean.Specifically, removing surface is to use electric angle grinder by the corrosion on the steel plate and oxide
Polishing grinding is clean, the steel plate is exposed metallic luster, then remove the greasy dirt on the steel plate with acetone soln.
B. retaining wall on slope.It is in curly steel plate that the steel plate is made into retaining wall on slope to obtain.
C. the pre-heat treatment.The pre-heat treatment is carried out to the curly steel plate, wherein, the heat range of the pre-heat treatment
It is on the basis of groove center line, both sides are respectively not less than the three times of the wall thickness of the steel plate and are not less than 100mm, while to described
It is incubated outside heat range in 100mm.
The pre-heat treatment is preheated using tracklayer heater or flame device, and the temperature of the preheating is more than 200 DEG C.
D. group is to tack welding.Tack welding is grouped to the curly steel plate, to form the base of the ERW 1
Body.
Group is more than 20mm to the length of tack welding, and group is more than 200mm to the spacing of tack welding.
E. back welding.Back welding is carried out to the matrix of the ERW 1, to obtain the straight weld with the first layer 7
Pipe 1.The back welding uses gas metal-arc welding (GMAW), and power supply uses dc source reversal connection (DCEP), welding wire model
For ER55-B2, gage of wire 1.2mm, welding current 170A, weldingvoltage 25V, speed of welding 40cm/min.
Dehydrogenation is carried out to the ERW 1 with the first layer 7, the dehydrogenation is specifically at 275 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
The gap of butt weld 6 can be eliminated by carrying out back welding, and guarantee is provided for the interior weldering of Lincoln weld hereafter
Quality.
F. interior weldering filling weldering.Interior weldering filling weldering is carried out to the ERW 1 with the first layer 7, to be had
The ERW 1 of second layer 8.The interior weldering filling weldering uses Lincoln weld (SAW), and power supply uses dc source reversal connection
(DCEP), the welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 450A,
Weldingvoltage is 32V, speed of welding 30cm/min.
Dehydrogenation is carried out to the ERW 1 with the second layer 8, the dehydrogenation is specifically at 275 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
G. interior weldering cosmetic welding.Interior weldering cosmetic welding is carried out to the ERW 1 with the second layer 8, to be had
The ERW 1 of 3rd layer 9.The interior weldering cosmetic welding uses Lincoln weld (SAW), and power supply uses dc source reversal connection
(DCEP), the welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 450A,
Weldingvoltage is 32V, speed of welding 30cm/min.
Dehydrogenation is carried out to the ERW 1 with the 3rd layer 9, the dehydrogenation is specifically at 275 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
H. outside weld filling weldering.The ERW 1 with the 3rd layer 9 is carried out, there is the 4th layer 10 to obtain
ERW 1.Need to carry out back chipping processing before the outside weld cosmetic welding, the back chipping processing is specifically to weld described first
The weld seam 6 of layer 7 removes.The outside weld filling weldering uses Lincoln weld (SAW), and power supply uses dc source reversal connection (DCEP),
The welding wire trade mark is H08CrMoVA, gage of wire 4.0mm, and the solder flux trade mark is SJ101-G, welding current 450A, weldingvoltage
For 32V, speed of welding 30cm/min.
Dehydrogenation is carried out to the ERW 1 with the 4th layer 10, the dehydrogenation is specifically at 275 DEG C
The Shi Jinhang rear heat of 30 minutes, is then incubated slow cooling.
I. outside weld cosmetic welding.Outside weld cosmetic welding is carried out to the ERW 1 with the 4th layer 10, to be had
The ERW 1 of 5th layer 11, the ERW 1 with the 5th layer 11 are the vertical masonry joint with five layers
Welded tube 1.The outside weld cosmetic welding uses Lincoln weld (SAW), and power supply uses dc source reversal connection (DCEP), and the welding wire trade mark is
H08CrMoVA, gage of wire 4.0mm, the solder flux trade mark are SJ101-G, welding current 450A, weldingvoltage 32V, are welded
Speed is 30cm/min.
Dehydrogenation is carried out to the ERW 1 with five layers, the dehydrogenation is specifically at 275 DEG C
The rear heat of 30 minutes is carried out, is then incubated slow cooling.
It should be noted that, it is necessary to which the temperature difference between adjacent layer is controlled at 225 DEG C during welding.Control
Interlayer temperature is to form the effusion of hardened structure and influence diffusible hydrogen to prevent cooling rate too fast.
Welding point such as finds that weld defect must carry out repair welding, repair welding uses SMAW through nondestructiving inspecting test
(SMAW), type of electrode R307H, core diameter 3.6mm, power supply use dc source reversal connection (DCEP), and welding current is
126A, weldingvoltage 24V, speed of welding 10cm/min, the temperature control of interpass is between 225 DEG C.Using SMAW
Repair welding can be in Rapid-Repair welding point tiny flaw, especially suitable for producing and the repairing of job site.
Finally, post weld heat treatment need to be carried out to the ERW 1 with five layers, the post weld heat treatment is will
Described there is the ERW 1 of five layers to be placed at 650 DEG C be incubated 1 hour.Post weld heat treatment is remaining in order to eliminate welding
Stress, the mechanical performance of welding point is improved, prevents welded tube from deforming.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of welding procedure of ERW, by the way that roll of steel plate is welded into the ERW with five layers, its feature
It is, comprises the following steps：
Step S1, it is in curly steel plate the steel plate to be made into retaining wall on slope to obtain；
Step S2, tack welding is grouped to the curly steel plate, to form the matrix of the ERW；
Step S3, back welding is carried out to the matrix of the ERW, to obtain the ERW with the first layer；
Step S4, interior weldering filling weldering is carried out to the ERW with the first layer, there is the straight of the second layer to obtain
Seam welded tube；
Step S5, interior weldering cosmetic welding is carried out to the ERW with the second layer, it is straight with the 3rd layer to obtain
Seam welded tube；
Step S6, outside weld filling weldering is carried out to the ERW with the 3rd layer, it is straight with the 4th layer to obtain
Seam welded tube；
Step S7, outside weld cosmetic welding is carried out to the ERW with the 4th layer, it is straight with the 5th layer to obtain
Seam welded tube, the ERW with the 5th layer are the ERW with five layers.
2. the welding procedure of ERW according to claim 1, it is characterised in that before tack welding is grouped,
The pre-heat treatment need to be carried out to the curly steel plate, wherein, the heat range of the pre-heat treatment be using groove center line as
Benchmark, both sides respectively not less than the steel plate wall thickness three times and be not less than 100mm, while to the heat range outside
It is incubated in 100mm；
The pre-heat treatment is preheated using tracklayer heater or flame device, and the temperature of the preheating is more than 200 DEG C.
3. the welding procedure of ERW according to claim 1, it is characterised in that in the step S2, group is to fixed
The length of position weldering is more than 20mm, and group is more than 200mm to the spacing of tack welding.
4. the welding procedure of ERW according to claim 1, it is characterised in that before step S1 is carried out, need pair
The steel plate carries out removing surface, and the removing surface is by the greasy dirt in the groove face and its edge 50mm, oxide
And corrosion is removed totally.
5. the welding procedure of ERW according to claim 4, it is characterised in that the removing surface is specifically to use
Electric angle grinder polishes the corrosion on the steel plate and oxide cmp totally, the steel plate is exposed metallic luster, then use
Acetone soln removes the greasy dirt on the steel plate.
6. the welding procedure of ERW according to claim 1, it is characterised in that in the step S3, the envelope
Back welding uses gas metal-arc welding, and power supply uses dc source reversal connection, gage of wire 1.2mm, welding current 150A
~190A, weldingvoltage are 22V~28V, and speed of welding is 36cm/min~43cm/min；
In the step S4, the interior weldering filling weldering uses Lincoln weld, and power supply uses dc source reversal connection, gage of wire
For 4.0mm, welding current is 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/min；
In the step S5, the interior weldering cosmetic welding uses Lincoln weld, and power supply uses dc source reversal connection, gage of wire
For 4.0mm, welding current is 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/min；
In the step S6, the outside weld filling weldering uses Lincoln weld, and power supply uses dc source reversal connection, gage of wire
For 4.0mm, welding current is 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/min；
In the step S7, the outside weld cosmetic welding uses Lincoln weld, and power supply uses dc source reversal connection, gage of wire
For 4.0mm, welding current is 405A~495A, and weldingvoltage is 30V~34V, and speed of welding is 26cm/min~34cm/min.
7. the welding procedure of ERW according to claim 1, it is characterised in that in step s 6, in the outside weld
Need to carry out back chipping processing before cosmetic welding, the back chipping processing is specifically to remove the weld seam of first layer.
8. the welding procedure of ERW according to claim 1, it is characterised in that temperature during welding between adjacent layer
Degree difference control is at 200 DEG C -250 DEG C.
9. the welding procedure of ERW according to claim 1, it is characterised in that in step S3-S7, each step
After the completion of need to carry out dehydrogenation immediately, the dehydrogenation is specifically that the rear heat of 30 minutes is carried out at 250 DEG C -300 DEG C, so
After be incubated slow cooling.
10. the welding procedure of the ERW according to any one of claim 1-9, it is characterised in that complete in step S7
Cheng Hou, post weld heat treatment need to be carried out to the ERW with five layers, the post weld heat treatment is to have by described in
The ERW of five layers is placed at 640 DEG C -660 DEG C and is incubated 1 hour.
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| CN108950173A (en) * | 2018-08-10 | 2018-12-07 | 燕山大学 | A kind of device and technique of online induction heating removal straight seam welded pipe residual stress |
| CN111408909A (en) * | 2020-05-08 | 2020-07-14 | 安徽伟宏钢结构集团股份有限公司 | Production welding process for forged steel parts |
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| CN107538142B (en) | 2019-11-01 |
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Effective date of registration: 20200324 Address after: 225000 Jiangsu Province, Yangzhou City Jiangyang Industrial Park Patentee after: JIANGSU TONGYU STEEL PIPE GROUP Co.,Ltd. Address before: 225008 No. 718 Jiangbei Road, Yangzhou, Jiangsu Patentee before: YANGZHOU TONGYU PRESSURE VESSEL Co.,Ltd. |