CN107186317B - A kind of automatic tempering overlaying method for pipeline maintenance - Google Patents
A kind of automatic tempering overlaying method for pipeline maintenance Download PDFInfo
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- CN107186317B CN107186317B CN201710494936.8A CN201710494936A CN107186317B CN 107186317 B CN107186317 B CN 107186317B CN 201710494936 A CN201710494936 A CN 201710494936A CN 107186317 B CN107186317 B CN 107186317B
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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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
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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 kind of automatic tempering overlaying methods for pipeline maintenance, comprising steps of step 1, tempering overlay cladding welding: pipeline anchor ring welding tempering overlay cladding need to be repaired in dissimilar metal joint, the tempering overlay cladding welding is welded using first welding layer mode, then overlapping mode welds between road；Step 2, transition overlay cladding welds: transition overlay cladding is that heap is welded on tempering overlay cladding by welding；Step 3, reinforcement temper bead/ annealing bead welds: carrying out tempering welding to being tempered overlay cladding and crossing overlay cladding both ends；Step 4, it polishes: after the completion of welding, reinforcement weld seam being polishing to the size of prescribed requirement.On the one hand it is that can be effectively improved nuclear power unit dissimilar metal joint low-alloy steel side heat affected zone organization and performance, realizes after built-up welding is repaired without post weld heat treatment；On the other hand, the reinforcement welding line structure pattern of design can not only enhance workpiece both ends tempering effect, also significantly reduce completion weld grinding workload.
Description
Technical field
The present invention relates to nuclear power welding technology fields, and in particular to a kind of automatic tempering built-up welding side for pipeline maintenance
Method.
Background technique
Voltage-stablizer is one of big main equipment of nuclear power station five.Voltage-stablizer safe end weld seam is one time for connecting voltage-stablizer and adapter tube
Road pressure boundary.The dissimilar metal welding line of the safe pipe nipple of early stage nuclear power plant voltage stabilizer largely uses Inconel-600 material.
Domestic and international nuclear power station finds that the alloy material has SCC in primary Ioops high purity water in Inconel-600 nickel-base alloy use
Higher sensibility；External nuclear power station Maintenance Cases a large amount of simultaneously show the Inconel-600 xenogenesis gold in nuclear power station lifetime
Belong to weld seam and is easy to appear Cracking Failure phenomenon.The structure of China's Qinshan safe end structure of 320MWe unit voltage-stablizer and external maintenance
It is similar, it would be possible to same Inconel-600 alloy weld cracking Problem of Failure can be faced.
Aiming at the problem that corrosion leakage occurs in Inconel-600 alloy material, foreign countries are usually on failure pipeline-weld
The overlay cladding of built-up welding certain thickness and width is sealed processing, forms new pressure boundary, and part is made circumferential crack occur
Structural strengthening prevents defect at this from revealing.But in maintenance weld deposit process, low-alloy steel welding heat affected zone can be generated not
Good quenching structure, such as martensite, Wei Shi body, but the field condition of nuclear island does not often allow to be improved using heat treatment mode
Heat affected zone organization.Temper bead/ annealing bead welding technique is the drawing effect played by subsequent passes to preceding welding bead heat affected area, can
It is effectively improved low-alloy steel heat affected zone organization.
Just because of temper bead/ annealing bead welding technique advantage, it is widely used in nuclear power welding maintenance and has become main trend.
Therefore, from last century the eighties international nuclear power industry giant such as FRAMATOME, WESTINGHOUSE,
AREVA, WSI etc. have put into a large amount of research in tempering welding maintenance technique research and development and application aspect, achieve achievement abundant,
Form a series of tempering welding maintenance technique systems.In consideration of it, tempering welding technique part is also included in by U.S.'s ASME standard
Into standards system.Temper bead/ annealing bead welding procedure related request is proposed in ASME standards system in Code Case740-1, such as:
Weld heat input is not more than 1.8KJ/m, and interlayer temperature is not higher than 66 DEG C.It is taken in ASME standard as shown in Figure 1 about temper bead/ annealing bead
Binding structure is by 1. temper bead/ annealing beads；2. base material；A welding bead on 3.；4. four parts of a lower welding bead form.
At home and abroad in terms of pipeline maintenance, WSI company, the U.S. is earliest design, using temper bead/ annealing bead bead-welding technology technology,
Its weld overlay process structure for being directed to design, it is mating to have developed a set of tempering welding technique, it has successfully been answered early in last century
For the safe pipe nipple built-up welding maintenance of nuclear power plant voltage stabilizer, in practice it has proved that the overlay cladding obtained using the tempering welding technique
It is quality, safe and reliable.
As shown in Fig. 2 the tempering bead-welding technology structure of WSI research and development.Its technique requires as follows:
Being tempered built-up welding interlayer overlap joint size S is 0.08inch (about 2mm)；
At least three layers of built-up welding of built-up welding of tempering, thickness is at least 3mm；
The heat input of three first layers is obtained more than 45 kilojoules/inch (1.8 kilojoules/millimeter) in no instance；
Three first layers temper bead/ annealing bead interlayer temperature is no more than 66 DEG C, and maximum interlayer temperature when all layers are applied at the scene is equal
It must not exceed 350 °F (180 DEG C)；
To the requirement of reinforcement temper bead/ annealing bead: after the completion of filling welding, finally reinforcing tempering effect in one layer of tempering layer of welding
Fruit.
By analysis, the advantage and disadvantage of the tempering bead-welding technology of WSI company research and development are specific as follows:
Advantage:
For the weld heat input of formulation, the tempering bead-welding technology structure of design can reach tempering effect；
Weld heat input is relatively large, is conducive to improve built-up welding efficiency.
Shortcoming:
(1) reinforce tempering effect by the way of one layer of welding, considerably increase subsequent overlay cladding polishing workload, no
Conducive to the raising of maintenance efficiency.
(2) do not find that WSI provides specific welding condition by investigation.
In addition, domestic aspect, Harbin institute of welding, East China University of Science's pressure bearing system and safety education portion emphasis are real
Test room, Su Redeng research institution has carried out the research of several automatic TIG welding temper bead/ annealing bead technology experiment rooms scale, but have no its face
To engineer application.
Summary of the invention
The purpose of the present invention is to overcome the deficiencies of the prior art and provide a kind of automatic tempering heap for pipeline maintenance
Soldering method solves in nuclear power dissimilar metal joint pipeline built-up welding maintenance, dissimilar metal joint low-alloy steel side heat affecting district's groups
It knits and performance cannot be effectively improved and existing reinforcement welding line structure increases the problem of completing weld grinding workload.
The present invention is achieved through the following technical solutions:
A kind of automatic tempering overlaying method for pipeline maintenance, comprising steps of
Step 1, tempering overlay cladding welding: need to repair pipeline anchor ring welding tempering overlay cladding in dissimilar metal joint, described
The welding of tempering overlay cladding is welded using first welding layer mode, then overlapping mode welds between road；
Step 2, transition overlay cladding welds: transition overlay cladding is that heap is welded on tempering overlay cladding by welding；
Step 3, reinforcement temper bead/ annealing bead welds: carrying out tempering welding to tempering overlay cladding and transition overlay cladding both ends；
Step 4, it polishes: after the completion of welding, reinforcement weld seam being polishing to the size of prescribed requirement.
Further, in the step 1, the tempering overlay cladding control is within 3 layers.
Further, in the step 1, the tempering overlay cladding is by first of temper bead/ annealing bead, second temper bead/ annealing bead,
Three temper bead/ annealing beads,, the road N temper bead/ annealing bead be formed by overlapping between road side by side, wherein between temper bead/ annealing bead road overlapping rate control 50%
Between~70%.
Further, in the step 2, the transition overlay cladding is 1~2 layer heap layer.
Further, in the step 2, the transition overlay cladding includes the second layer tempering being welded on tempering overlay cladding
Welding bead, the second layer temper bead/ annealing bead is by first of temper bead/ annealing bead of the second layer, second layer second temper bead/ annealing bead and the second layer
The road N temper bead/ annealing bead is formed by overlapping between road side by side, and the arcing point of first of temper bead/ annealing bead of the second layer and first of tempering are welded
The distance of the arcing point in road is S；The only acnode of the only acnode and road N temper bead/ annealing bead of the road second layer N temper bead/ annealing bead
Distance is also S；The S control is between the 30%~50% of temper bead/ annealing bead width.
Further, in the step 2, the transition overlay cladding further includes the third being welded on second layer temper bead/ annealing bead
Layer temper bead/ annealing bead, the third layer temper bead/ annealing bead by first of temper bead/ annealing bead of third layer and the road third layer N temper bead/ annealing bead simultaneously
Row is formed by overlapping between road；The arcing point of first of temper bead/ annealing bead of the third layer and the arcing point of first of temper bead/ annealing bead of the second layer
Distance be also S；The only acnode of only acnode and the road the second layer N temper bead/ annealing bead of the road third layer N temper bead/ annealing bead away from
From also be S；The S control is between the 30%~50% of temper bead/ annealing bead width.
Further, when transition overlay cladding thickness low LCL, also increase step 3.1 between the step 3 and step 4,
The step 3.1, filling overlay cladding welding: filling overlay cladding is that heap is welded in transition overlay cladding by welding
On 13.
Further, the filling overlay cladding is the thickening layer for being welded on transition overlay cladding top layer, including the 4th layer
One of temper bead/ annealing bead and the 4th layer of road N temper bead/ annealing bead are formed by overlapping between road side by side；4th layer of first of the temper bead/ annealing bead
First of temper bead/ annealing bead of arcing point and third layer arcing point at a distance from also S；The only arc of the 4th layer of road the N temper bead/ annealing bead
Point is also S at a distance from the only acnode of the road third layer N temper bead/ annealing bead；S control temper bead/ annealing bead width 30%~
Between 50%.
Further, in the step 3, the reinforcement temper bead/ annealing bead includes to tempering overlay cladding and transition overlay cladding one end
First of reinforcement temper bead/ annealing bead, second reinforcement temper bead/ annealing bead, the third road reinforcement temper bead/ annealing bead, the 4th of portion's progress reinforcement tempering
Road reinforcement temper bead/ annealing bead；It is tempered with the 5th reinforcement for carrying out reinforcement tempering to tempering overlay cladding and transition overlay cladding the other end
Welding bead, the 6th reinforcement temper bead/ annealing bead, the 7th reinforcement temper bead/ annealing bead and the 8th reinforcement temper bead/ annealing bead；
First of reinforcement temper bead/ annealing bead is that heap is welded in first of temper bead/ annealing bead of the second layer and by welding
On three layers of first of temper bead/ annealing bead, starting the arc position is welded in first of temper bead/ annealing bead of first of temper bead/ annealing bead of the second layer and third layer
Between toe of weld on；
Second reinforcement temper bead/ annealing bead is that heap is welded in first of reinforcement temper bead/ annealing bead and the 4th layer by welding
On one of temper bead/ annealing bead, toe of weld of the starting the arc position between first of reinforcement temper bead/ annealing bead and the 4th layer of first of temper bead/ annealing bead is welded
On；
Reinforcement temper bead/ annealing bead in third road is that heap is welded in first of reinforcement temper bead/ annealing bead by welding and second is mended
On strong temper bead/ annealing bead, starting the arc position is welded on the toe of weld between first of reinforcement temper bead/ annealing bead and second reinforcement temper bead/ annealing bead；
4th reinforcement temper bead/ annealing bead is that heap is welded in second reinforcement temper bead/ annealing bead by welding and third road is mended
On strong temper bead/ annealing bead, starting the arc position is welded on the toe of weld between second reinforcement temper bead/ annealing bead and third road reinforcement temper bead/ annealing bead；
The 5th reinforcement temper bead/ annealing bead is symmetrically welded with first of reinforcement temper bead/ annealing bead；The 6th reinforcement tempering
Welding bead is symmetrically welded with second reinforcement temper bead/ annealing bead；The 7th reinforcement temper bead/ annealing bead and third road reinforcement temper bead/ annealing bead pair
Claim welding；The 8th reinforcement temper bead/ annealing bead is symmetrically welded with the 4th reinforcement temper bead/ annealing bead.
Further, the arcing point of first of reinforcement temper bead/ annealing bead is at a distance from the arcing point of first of temper bead/ annealing bead
For S；The only acnode of the 5th reinforcement temper bead/ annealing bead is also S at a distance from the only acnode of the road N temper bead/ annealing bead；The S control
System is between the 30%~50% of temper bead/ annealing bead width.
Compared with prior art, the present invention having the following advantages and benefits:
It on the one hand is that can be effectively improved nuclear power unit dissimilar metal joint low-alloy steel side heat affected zone organization and performance,
It realizes after built-up welding is repaired without post weld heat treatment；On the other hand, the reinforcement welding line structure pattern of design can not only enhance
Workpiece both ends tempering effect also significantly reduces completion weld grinding workload.
For pipeline maintenance overlay cladding structure, the automatic tempering bead-welding technology technology proposed using the application, according to ASME
Standards system has carried out design demonstration, in terms of being mainly manifested in following two:
1. surfacing layer quality
After the completion of built-up welding, according to ASME related request, liquid penetration examination, ultrasound examination, water have been carried out to overlay cladding
Press the test such as test, side bend test, impact flexibility, metallographic, hardness, chemical component, corrosive nature.Test result meets ASME skill
The requirement of art system.
2. heat affected zone organization performance
After the completion of built-up welding, is observed under 200 times and 400 times using optical microscopy, do not find quenched martensite group
Presence is knitted, heat affected zone organization is mainly that tempered sorbite, tempered troostite and a small amount of tempered martensite are constituted.
It is measured by Vickers hardness, heat affected zone hardness controls within the scope of 260HV10~350HV10, meets ASME mark
Quasi- and RCC-M standard requirements.
3. overlay cladding stress state and distribution
After the completion of built-up welding, using neutron diffraction test method, test analysis is carried out to overlay cladding residual stress, is as a result shown
Show, for entire overlay cladding based on compression, stress distribution is reasonable, and predominantly compression, does not find stress concentration point.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 overlaps signal figure structure schematic representation between existing temper bead/ annealing bead road；
Fig. 2 is the structural schematic diagram of voltage-stablizer pipeline maintenance overlay cladding of the present invention；
Fig. 3 is present invention tempering overlay cladding overlapped structural schematic diagram；
Fig. 4 is present invention tempering welding layer overlapped structural schematic diagram；
Fig. 5 is the welding structure schematic diagram of reinforcement temper bead/ annealing bead of the present invention；
Label and corresponding parts title in attached drawing:
1- temper bead/ annealing bead；2- base material；The upper welding bead of 3-；The lower welding bead of 4-；First of temper bead/ annealing bead of 5- is tempered by second
Welding bead covering part；6- low-alloy steel pipeline section；The pre- heap side 7-Inconel600；8-Inconel600 weld seam；9- stainless steel transition
Adapter tube；10- stainless steel weld joint；11- stainless steel pipeline section；12- is tempered overlay cladding；13- transition overlay cladding；14- overlay cladding；15-
Two temper bead/ annealing beads are by third road temper bead/ annealing bead covering part；First of temper bead/ annealing bead of 16-；17- second temper bead/ annealing bead；18-
Three temper bead/ annealing beads；The road 19- N temper bead/ annealing bead；First of temper bead/ annealing bead of the 20- second layer；The tempering weldering of 21- second layer second
Road；The road 22- second layer N temper bead/ annealing bead；First of temper bead/ annealing bead of 23- third layer；The road 24- third layer N temper bead/ annealing bead；25-
First of reinforcement temper bead/ annealing bead；26- second reinforcement temper bead/ annealing bead；27- third road reinforcement temper bead/ annealing bead；The 4th reinforcement of 28-
Temper bead/ annealing bead；The 5th reinforcement temper bead/ annealing bead of 29-；The 6th reinforcement temper bead/ annealing bead of 30-；The 7th reinforcement temper bead/ annealing bead of 31-；
The 8th reinforcement temper bead/ annealing bead of 32-；The 4th layer of first of temper bead/ annealing bead of 33-；The 4th layer of road N temper bead/ annealing bead of 34-.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
As shown in Figure 2-5, a kind of automatic tempering overlaying method for pipeline maintenance of the present invention, as shown in Figure 2, right
When voltage-stablizer pipeline maintenance, the pre- heap side 7 Inconel600 is connected on the end face of low-alloy steel pipeline section 6 by built-up welding mode；
The pre- heap side 7 Inconel600 is connected with stainless steel transition connecting pipe 9 by welding manner, and Inconel600 weld seam 8 is formed；Stainless steel
Transition connecting pipe 9 with stainless steel pipeline section 11 is connected by welding manner, stainless steel weld joint 10 is formed, in Inconel600 weld seam 8
Pipeline anchor ring need to be repaired with dissimilar metal joint is formed on stainless steel weld joint 10；
Tempering overlay cladding 12 be welded in by welding manner heap the pre- heap side 7 low alloy steel section 6, Inconel600,
Inconel600 weld seam 8, stainless steel transition connecting pipe 9, stainless steel weld joint 10, stainless steel pipeline section 11；Transition overlay cladding 13 is to pass through
The mode heap of welding is welded on tempering overlay cladding 12；Overlay cladding 14 is that heap is welded on transition overlay cladding 13 by welding.
12 general control of overlay cladding is tempered in overlay cladding structure in 3 layer heap layers；The thickness of transition overlay cladding 13 is because of tempering
Pass weld heat input and the excessive layer heap weldering difference of weld heat input and it is different, general control is in 1~2 layer heap layer.Built-up welding
The thickness of layer 14 is determined by the actual demand that built-up welding is repaired.
It is tempered the welding structure of overlay cladding 12:
As shown in Figure 3, tempering 12 bridging arrangement of overlay cladding is by low-alloy steel pipeline section 6, first of temper bead/ annealing bead 16, the
Two temper bead/ annealing beads 17, third road temper bead/ annealing bead 18,, the road N temper bead/ annealing bead 19 is formed by overlapping between road side by side；First of tempering
Welding bead is formed by second temper bead/ annealing bead covering part 5, second temper bead/ annealing bead by third road temper bead/ annealing bead covering part 15 etc..
First of temper bead/ annealing bead 16, second temper bead/ annealing bead 17, third road temper bead/ annealing bead 18 pass sequentially through welding respectively
Mode heap is welded in low alloy steel section 6.
The rate of taking refers to part that preceding one of temper bead/ annealing bead is covered by rear one of temper bead/ annealing bead in previous temper bead/ annealing bead between road
In shared ratio, temper bead/ annealing bead overlapping rate is a/b × 100% in Fig. 3.Be tempered overlay cladding 12 between overlapping rate a/b ×
100% and c/d × 100% control between 50%~70%.
The control of 12 weld heat input of overlay cladding is tempered within the scope of 0.7KJ/mm~1.0KJ/mm, automatic welding wire feed rate
Within the scope of 500mm/min~700mm/min, interlayer temperature is controlled within the scope of 60 DEG C~70 DEG C for control.
The welding structure of transition overlay cladding 13:
As shown in Figure 4, transition overlay cladding 13 is 1~2 layer heap layer.Transition overlay cladding 13 includes being welded on tempering built-up welding
Second layer temper bead/ annealing bead on layer 12, the second layer temper bead/ annealing bead is by first of temper bead/ annealing bead of the second layer 20, the second layer second
Road temper bead/ annealing bead 21 and the road second layer N temper bead/ annealing bead 22 are formed by overlapping between road side by side, first of tempering of second layer weldering
The arcing point distance S of the arcing point in road 20 and first of temper bead/ annealing bead 16；The only arc of the road second layer N temper bead/ annealing bead 22
Point is also S at a distance from the only acnode of the road N temper bead/ annealing bead 19；S control temper bead/ annealing bead width 30%~50% it
Between, temper bead/ annealing bead is exactly the welding welding bead of welding tempering overlay cladding 12, tempering welding layer 13 or overlay cladding 14.
13 weld heat input of transition overlay cladding controls the automatic welding wire feed rate within the scope of 0.9KJ/mm~1.2KJ/mm
Within the scope of 1000mm/min~1300mm/min, interlayer temperature is controlled within the scope of 150 DEG C~180 DEG C for control.
The welding structure of overlay cladding 14:
It is as shown in Figure 4, when transition 13 thickness low LCL of overlay cladding, practical need that the thickness of overlay cladding 14 is repaired by built-up welding
Ask determining.Overlay cladding 14 is that heap is welded on transition overlay cladding 13 by welding.Filling overlay cladding 14 is to be welded on to cross heap
The thickening layer of 13 top layer of layer, including the 4th layer of first of temper bead/ annealing bead 33 and the 4th layer of road N temper bead/ annealing bead 34 are side by side
It is formed by overlapping between road；The starting the arc of the arcing point and first of temper bead/ annealing bead of third layer 23 of 4th layer of first of the temper bead/ annealing bead 33
The distance also S of point；The only acnode of the 4th layer of road the N temper bead/ annealing bead 34 and the only acnode of the road third layer N temper bead/ annealing bead 24
Distance be also S；The S control is between the 30%~50% of temper bead/ annealing bead width.
The control of 14 weld heat input of overlay cladding is filled within the scope of 1.0KJ/mm~1.5KJ/mm, automatic welding wire feed rate
Within the scope of 2200mm/min~2700mm/min, interlayer temperature is controlled within the scope of 150 DEG C~180 DEG C for control.
Reinforcement temper bead/ annealing bead structure
As shown in Figure 5, reinforcement temper bead/ annealing bead includes to tempering overlay cladding and crossing the progress reinforcement tempering of overlay cladding one end
First of reinforcement temper bead/ annealing bead 25, second reinforcement temper bead/ annealing bead 26, third road reinforcement temper bead/ annealing bead 27, the 4th reinforcement return
Fiery welding bead 28；With to tempering overlay cladding and cross overlay cladding the other end carry out reinforcement tempering the 5th reinforcement temper bead/ annealing bead 29,
6th reinforcement temper bead/ annealing bead 30, the 7th reinforcement temper bead/ annealing bead 31 and the 8th reinforcement temper bead/ annealing bead 32；
First of reinforcement temper bead/ annealing bead 25 is that heap is welded in first of temper bead/ annealing bead of the second layer 20 and by welding
On three layers of first of temper bead/ annealing bead 23, welding starting the arc position is tempered in first of temper bead/ annealing bead of the second layer 20 and first of third layer
On toe of weld between welding bead 23；
Second reinforcement temper bead/ annealing bead 26 is that heap is welded in first of reinforcement temper bead/ annealing bead 25 and the 4th by welding
On first of temper bead/ annealing bead 33 of layer, starting the arc position is welded in first of reinforcement temper bead/ annealing bead 25 and the 4th layer of first of temper bead/ annealing bead
On toe of weld between 33；
Third road reinforcement temper bead/ annealing bead 27 is that heap is welded in first of reinforcement temper bead/ annealing bead 25 and second by welding
On road reinforcement temper bead/ annealing bead 26, starting the arc position is welded between first of reinforcement temper bead/ annealing bead 25 and second reinforcement temper bead/ annealing bead 26
Toe of weld on；
4th reinforcement temper bead/ annealing bead 28 is that heap is welded in second reinforcement temper bead/ annealing bead 26 and third by welding
On road reinforcement temper bead/ annealing bead 27, starting the arc position is welded between second reinforcement temper bead/ annealing bead 26 and third road reinforcement temper bead/ annealing bead 27
Toe of weld on；
The 5th reinforcement temper bead/ annealing bead 29 is symmetrically welded with first of reinforcement temper bead/ annealing bead 25；6th reinforcement
Temper bead/ annealing bead 30 is symmetrically welded with second reinforcement temper bead/ annealing bead 26；The 7th reinforcement temper bead/ annealing bead 31 and the reinforcement of third road
Temper bead/ annealing bead 27 is symmetrically welded；8th reinforcement temper bead/ annealing bead 32 is symmetrically welded with the 4th reinforcement temper bead/ annealing bead 28.
The arcing point distance S of the arcing point of first of reinforcement temper bead/ annealing bead 25 and first of temper bead/ annealing bead 16；Described
The only acnode of five reinforcement temper bead/ annealing beads 29 is also S at a distance from the only acnode of the road N temper bead/ annealing bead 19；The S control is being returned
Between the 30%~50% of fiery weld width.
Reinforcement temper bead/ annealing bead weld heat input controls within the scope of 0.7KJ/mm~1.0KJ/mm, and interlayer temperature is controlled 60
DEG C~70 DEG C within the scope of, first of reinforcement temper bead/ annealing bead 28, second reinforcement temper bead/ annealing bead 29, the 5th reinforcement temper bead/ annealing bead 32
When with the welding of the 6th reinforcement temper bead/ annealing bead 33, automatic welding wire feed rate is controlled in 500mm/min~700mm/min range
Interior, interlayer temperature controls within the scope of 60 DEG C~70 DEG C.Remaining reinforcement temper bead/ annealing bead weld heat input control 0.7KJ/mm~
Within the scope of 1.0KJ/mm, interlayer temperature is controlled within the scope of 60 DEG C~70 DEG C, and welding wire is not added in welding.
Tempering welding is to be easy to appear martensitic structure transformation in the welding process for the easily hardened steel such as low-alloy steel, is led
Cause heat affected zone organization is seriously hardened and embrittlement, by welding procedure and welding bead structure control, a kind of improvement heat affecting of formation
A kind of welding method that district's groups are knitted.
When being tempered welding to weld primarily directed to low-alloy steel, and can not or be not easy to implement post weld heat treatment, the spy of use
Different welding method.
Need to be tempered the position or position of welding: low-alloy steel, dissimilar metal (part containing low-alloy steel), low-alloy steel weldering
Seam etc..
Be tempered the principle of welding: size, welding bead/layer overlapping rate, weld heat input etc. by controlling welding bead it is crucial because
Element, so that rear Thermal Cycle together has drawing effect to preceding welding heat affected zone together, so as to improve low-alloy steel weldering
Connect heat affected zone organization performance.
Reinforce temper bead/ annealing bead to refer to, when the time of the Thermal Cycle of certain region (or position) experience in tempering welding process
Not enough, when can not thoroughly improve heat affected zone organization, increase welding temper bead/ annealing bead in specific position, increase and be tempered area not in place
The Thermal Cycle in domain is to improve the means of heat affected zone organization.
Reinforce the position that temper bead/ annealing bead generally applies:
(1) if pipeline, welding can form whole trap ring, it is only necessary to be in the two sides increase of the width direction of layer
It can；
(2) if plate or closed loop weld seam can not be formed, needs to increase in the end of layer width direction and length direction
Reinforcement temper bead/ annealing bead.
A kind of automatic tempering overlaying method for pipeline maintenance, for pipeline maintenance overlay cladding structure, using the application
The automatic tempering bead-welding technology technology proposed has carried out design demonstration according to ASME standards system, has been mainly manifested in following two
Aspect:
1. surfacing layer quality
After the completion of built-up welding, according to ASME related request, liquid penetration examination, ultrasound examination, water have been carried out to overlay cladding
Press the test such as test, side bend test, impact flexibility, metallographic, hardness, chemical component, corrosive nature.Test result meets ASME skill
The requirement of art system.
2. heat affected zone organization performance
After the completion of built-up welding, is observed under 200 times and 400 times using optical microscopy, do not find quenched martensite group
Presence is knitted, heat affected zone organization is mainly that tempered sorbite, tempered troostite and a small amount of tempered martensite are constituted.
It is measured by Vickers hardness, heat affected zone hardness controls within the scope of 260HV10~350HV10, meets ASME mark
Quasi- and RCC-M standard requirements.
3. overlay cladding stress state and distribution
After the completion of built-up welding, using neutron diffraction test method, test analysis is carried out to overlay cladding residual stress, is as a result shown
Show, for entire overlay cladding based on compression, stress distribution is reasonable, and predominantly compression, does not find stress concentration point.
Embodiment 2,
As shown in Figure 2-5, a kind of automatic tempering overlaying method for pipeline maintenance of the present invention, is tempered bead-welding technology automatically
The built-up welding of technology can be divided into following 5 steps and complete, specific as follows:
Step 1: tempering overlay cladding welding
Welding connects method using argonaut welding；Welding addition ERNiCrFe-7A nickel-base alloy bare welding filler metal；Between welding layer/road
Overlap joint, the progress provided according to this patent；Weld heat input controls between 0.7KJ/mm~1.0KJ/mm；Wire feed rate control
Within the scope of 500mm/min~700mm/min, interlayer temperature is controlled within the scope of 60 DEG C~70 DEG C.
Step 2: the welding of transition overlay cladding
Transition overlay cladding weld heat input controls within the scope of 0.9KJ/mm~1.2KJ/mm, welding addition ERNiCrFe-
7A nickel-base alloy bare welding filler metal, wire feed rate control within the scope of 1000mm/min~1300mm/min, and interlayer temperature is controlled at 150 DEG C
Within the scope of~180 DEG C.
Step 3: overlay cladding welding
The control of overlay cladding weld heat input is filled within the scope of 1.0KJ/mm~1.5KJ/mm, welding addition ERNiCrFe-
7A nickel-base alloy bare welding filler metal, wire feed rate control within the scope of 2200mm/min~2700mm/min, and interlayer temperature is controlled at 150 DEG C
Within the scope of~180 DEG C.
Step 4: the welding of reinforcement temper bead/ annealing bead
It is carried out after the completion of reinforced welding seam welding can be completed in the 4th layer of welding or entire overlay cladding welds.
Reinforcement temper bead/ annealing bead weld heat input controls within the scope of 0.7KJ/mm~1.0KJ/mm, and interlayer temperature is controlled 60
DEG C~70 DEG C within the scope of, first of reinforcement temper bead/ annealing bead 28, second reinforcement temper bead/ annealing bead 29, the 5th reinforcement temper bead/ annealing bead 32
When with the welding of the 6th reinforcement temper bead/ annealing bead 33, automatic welding wire feed rate is controlled in 500mm/min~700mm/min range
Interior, interlayer temperature controls within the scope of 60 DEG C~70 DEG C.Remaining reinforcement temper bead/ annealing bead weld heat input control 0.7KJ/mm~
Within the scope of 1.0KJ/mm, interlayer temperature is controlled within the scope of 60 DEG C~70 DEG C, and welding wire is not added in welding.
Step 5: reinforcement weld grinding
After the completion of welding, reinforcement weld seam is polishing to the size of prescribed requirement.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of automatic tempering overlaying method for pipeline maintenance, it is characterised in that: comprising steps of
Step 1, tempering overlay cladding welding: need to repair pipeline anchor ring welding tempering overlay cladding (12) in dissimilar metal joint, described
Tempering overlay cladding (12) welding is welded using first welding layer mode, then overlapping mode welds between road；
Step 2, transition overlay cladding welds: transition overlay cladding (13) is that heap is welded in tempering overlay cladding (12) by welding
On；
Step 3, reinforcement temper bead/ annealing bead welds: carrying out tempering weldering to tempering overlay cladding (12) and transition overlay cladding (13) both ends
It connects；
Step 4, it polishes: after the completion of welding, reinforcement weld seam being polishing to the size of prescribed requirement.
2. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 1, it is characterised in that: the step
In rapid 1, tempering overlay cladding (12) control is at 1-3 layers.
3. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 1 or 2, it is characterised in that: institute
It states in step 1, the tempering overlay cladding is by first of temper bead/ annealing bead (16), second temper bead/ annealing bead (17), the tempering weldering of third road
Road (18),, the road N temper bead/ annealing bead (19) be formed by overlapping between road side by side, wherein between temper bead/ annealing bead road overlapping rate control 50%~
Between 70%.
4. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 1, it is characterised in that: the step
In rapid 2, the transition overlay cladding (13) is 1~2 layer heap layer.
5. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 3, it is characterised in that: the step
In rapid 2, the transition overlay cladding (13) includes the second layer temper bead/ annealing bead being welded in tempering overlay cladding (12), the second layer
Temper bead/ annealing bead is returned by first of temper bead/ annealing bead of the second layer (20), second layer second temper bead/ annealing bead (21) and the road second layer N
Fiery welding bead (22) is formed by overlapping between road side by side, and the arcing point of first of temper bead/ annealing bead of the second layer (20) and first of tempering are welded
The distance of the arcing point in road (16) is S；Only acnode and the road the N temper bead/ annealing bead of the road the second layer N temper bead/ annealing bead (22)
(19) distance of only acnode is also S；The S control is between the 30%~50% of temper bead/ annealing bead width.
6. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 5, it is characterised in that: the step
In rapid 2, the transition overlay cladding (13) further includes the third layer temper bead/ annealing bead being welded on second layer temper bead/ annealing bead, the third
Layer temper bead/ annealing bead between first of temper bead/ annealing bead of third layer (23) and the road third layer N temper bead/ annealing bead (24) side by side road by overlapping
It forms；The arcing point of the arcing point and first of temper bead/ annealing bead of the second layer (20) of first of temper bead/ annealing bead of the third layer (23)
Apart from also S；The only acnode of the road the third layer N temper bead/ annealing bead (24) and the only acnode of the road second layer N temper bead/ annealing bead (20)
Distance be also S；The S control is between the 30%~50% of temper bead/ annealing bead width.
7. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 6, it is characterised in that: work as transition
When overlay cladding (13) thickness low LCL, also increase step 3.1 between the step 3 and step 4,
The step 3.1, filling overlay cladding welding: filling overlay cladding (14) is that heap is welded in transition overlay cladding by welding
(13) on.
8. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 7, it is characterised in that: described to fill out
Filling overlay cladding (14) is the thickening layer for being welded on transition overlay cladding (13) top layer, including the 4th layer of first of temper bead/ annealing bead
(33), it is formed by overlapping between road side by side with the 4th layer of road N temper bead/ annealing bead (34)；Described 4th layer first of temper bead/ annealing bead (33)
First of temper bead/ annealing bead of arcing point and third layer (23) arcing point at a distance from also S；The 4th layer of road the N temper bead/ annealing bead
(34) only acnode is also S at a distance from the only acnode of the road third layer N temper bead/ annealing bead (24)；The S control is in temper bead/ annealing bead
Between the 30%~50% of width.
9. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 8, it is characterised in that: the step
In rapid 3, the reinforcement temper bead/ annealing bead includes first that reinforcement tempering is carried out to tempering overlay cladding and transition overlay cladding one end
Reinforcement temper bead/ annealing bead (25), second reinforcement temper bead/ annealing bead (26), third road reinforcement temper bead/ annealing bead (27), the 4th reinforcement tempering
Welding bead (28)；With the 5th reinforcement temper bead/ annealing bead for carrying out reinforcement tempering to tempering overlay cladding and transition overlay cladding the other end
(29), the 6th reinforcement temper bead/ annealing bead (30), the 7th reinforcement temper bead/ annealing bead (31) and the 8th reinforcement temper bead/ annealing bead (32)；
First of reinforcement temper bead/ annealing bead (25) is that heap is welded in first of temper bead/ annealing bead of the second layer (20) by welding
On first of temper bead/ annealing bead of third layer (23), welding starting the arc position is in first of temper bead/ annealing bead of the second layer (20) and third layer the
On toe of weld between one of temper bead/ annealing bead (23)；
Second reinforcement temper bead/ annealing bead (26) is that heap is welded in first of reinforcement temper bead/ annealing bead (25) and the 4th by welding
On first of temper bead/ annealing bead (33) of layer, welding starting the arc position is in first of reinforcement temper bead/ annealing bead (25) and the 4th layer of first of tempering
On toe of weld between welding bead (33)；
Third road reinforcement temper bead/ annealing bead (27) is that heap is welded in first of reinforcement temper bead/ annealing bead (25) and second by welding
On road reinforcement temper bead/ annealing bead (26), starting the arc position is welded in first of reinforcement temper bead/ annealing bead (25) and second reinforcement temper bead/ annealing bead
(26) on the toe of weld between；
4th reinforcement temper bead/ annealing bead (28) is that heap is welded in second reinforcement temper bead/ annealing bead (26) and third by welding
On road reinforcement temper bead/ annealing bead (27), starting the arc position is welded in second reinforcement temper bead/ annealing bead (26) and third road reinforcement temper bead/ annealing bead
(27) on the toe of weld between；
The 5th reinforcement temper bead/ annealing bead (29) is symmetrically welded with first of reinforcement temper bead/ annealing bead (25)；6th reinforcement
Temper bead/ annealing bead (30) is symmetrically welded with second reinforcement temper bead/ annealing bead (26)；The 7th reinforcement temper bead/ annealing bead (31) and third
Road reinforcement temper bead/ annealing bead (27) is symmetrically welded；The 8th reinforcement temper bead/ annealing bead (32) and the 4th reinforcement temper bead/ annealing bead (28)
It is symmetrically welded.
10. a kind of automatic tempering overlaying method for pipeline maintenance according to claim 9, it is characterised in that: described
The arcing point of first of reinforcement temper bead/ annealing bead (25) is S at a distance from the arcing point of first of temper bead/ annealing bead (16)；Described 5th
The only acnode of road reinforcement temper bead/ annealing bead (29) is also S at a distance from the only acnode of the road N temper bead/ annealing bead (19)；The S control exists
Between the 30%~50% of temper bead/ annealing bead width.
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| CN108655604A (en) * | 2018-06-22 | 2018-10-16 | 中核核电运行管理有限公司 | A kind of heavy water reactor main pipeline branch pipe connection weld deposit repairing structure |
| CN110935990A (en) * | 2018-09-21 | 2020-03-31 | 东方电气集团东方锅炉股份有限公司 | Welding method for weld bead cover surface welding bead of high-strength low-alloy steel submerged-arc welding |
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| US5591363A (en) * | 1995-03-02 | 1997-01-07 | Westinghouse Electric Corporation | Optimized welding technique for NiMoV rotors for high temperature applications |
| JP2007130654A (en) * | 2005-11-09 | 2007-05-31 | Nippon Steel Engineering Co Ltd | Temper bead method |
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