CN105252117B - A kind of nickel alloy process pipe Manual argon-arc welding - Google Patents
A kind of nickel alloy process pipe Manual argon-arc welding Download PDFInfo
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- CN105252117B CN105252117B CN201510765399.7A CN201510765399A CN105252117B CN 105252117 B CN105252117 B CN 105252117B CN 201510765399 A CN201510765399 A CN 201510765399A CN 105252117 B CN105252117 B CN 105252117B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of nickel alloy process pipe Manual argon-arc welding, comprise the following steps：A, welding preparation, B, group pair, C, tack welding：D, checked before weldering；E, manual welding, using straight polarity direct current, leftward welding, multiple tracks vertical-up welding connects, including it is following step by step：E1 welding condition) is determined：E2 the welding position, starting the arc position and welding direction of backing welding) are determined：E3) backing welding：E4) form second layer deposited metal and rear layer deposited metals on backing welding deposited metal welding bead, each objective factor of welding is checked in F, welding process；G, postwelding inspection.When welding trade mark N08825 nickel alloy process pipes using the welding procedure, appearance of weld is attractive in appearance, and weldering line is uniform, and heat input is small, dense structure, and weldquality is stable, and welding difficulty is low.
Description
Technical field
The present invention relates to a kind of welding procedure, particularly relates to a kind of specifically for the nickel alloy process duct that the trade mark is N08825
Road Manual argon-arc welding.
Background technology
N08825 process pipes cleaning inside requires higher.Manual metal-arc welding single face welding and double face shaping technology, although can ensure
Welding quality, still, the slag on root surface can not be removed thoroughly, it is impossible to meet the requirement of process pipe cleaning inside degree, fit
It is restricted with scope.And argon tungsten-arc welding is due to no slag, heat is concentrated, and fusion penetration is big, turns into N08825 process pipes and beats
The preferred welding technique of bottom, filling and the welding of capping layer.Traditional N08825 GTAWs group is small to gap, very
To gapless, welding requirements welder keeps arc length stable, dead-beat, takes the air line.Often there is electric arc in groove two in actual welding
The side residence time is uneven, and arc length is unstable, causes that outward appearance shaping is bad, does not merge, stomata even incomplete root penetration etc.
Defect.It is generally high to welder's skill set requirements, welding quality unstable.
The content of the invention
The technical problems to be solved by the invention are：A kind of nickel alloy process pipe GTAW Welder is provided
Skill, when welding N08825 nickel alloy process pipes using the welding procedure, appearance of weld is attractive in appearance, and weldering line is uniform, and heat input is small,
Dense structure, weldquality is stable, and welding difficulty is low.
In order to solve the above technical problems, the technical scheme is that：A kind of nickel alloy process pipe handwork tungsten electrode argon arc
Welding procedure is welded, is comprised the following steps：
A, welding preparation, including it is following step by step：
A1) select tools：Argon-arc torch, a diameter of 40-50mm from 75 °2Length is 3-4m hand handles wire, diameter
2.0mm or 2.4mm cerium tungsten electrode, the tip of cerium tungsten electrode are processed as the truncated cone of 35 ° -45 ° of taper, and the roundlet of truncated cone is straight
Footpath is 0.8-1.0mm, and cerium tungsten electrode is 6-8mm with respect to the extension elongation of the porcelain mouth of argon-arc torch；
A2) the acceptance of tubing and instrument：Check the trade mark and specification of tubing, it is ensured that the tubing trade mark is N08825, directly
Footpath D>Φ 13mm, δ>1.5mm；Check whether the measurement instrument of DC argon arc welding torch and argon flow amount meter has been demarcated and in the term of validity
It is interior, check whether purity of argon is 99.99%, check whether welding wire surface cleans, the acceptance of tubing, welding wire physical and chemical parameter
It is whether qualified；
A3) tubing is rule and carries out dimensional gaughing；
A4) to tubing cutting stock, otch end face and the perpendicularity of tubing axis are ensured；
A5) to the otch end face finished edge for two tubing that need to be welded, make the bevel angle sums of two tubing for 56 °-
65 °, root face 0.5-1mm；
A6 it is) that eliminating impurities in groove surfaces externally and internally 20mm are clean, expose metallic luster；
A7) check whether the argon-filling device operation inside tubing meets technological requirement；
B, two tubing that weld will be needed to be grouped, including it is following step by step：
B1) confirmation group to tooling fixture it is identical with tubing material or identical group when using solid point block, it is necessary to also will
Solid point block used in confirmation is identical with tubing material or identical group；
B2) confirmation group is less than the 10% of wall thickness, and is less than or equal to 1mm to pipeline section axiality, interior misalignment；
B3) by two tubing horizontal groups pair, the group at the point of tubing clock position six is 2.4mm to gap, the group at ten two points
3.2mm is more than to gap, it is uniform 2.4mm to gap to horizontally rotate weld bond group, and horizontal position weld bond group is uniform to gap
2.4mm；
C, by two tubing carry out tack welding, including it is following step by step：
C1) determine group to mode：As caliber Φ 13mm ＜ D ＜ Φ 168.3mm, from spot welding group to fixed or solid point block
Group is to fixation；As D >=Φ 168.3mm, from solid point block group to fixation；
C2) when from spot welding group pair, before the welding of groove root tack-weld, determine that back side argon filling purity meets welding
It is required that groove root tack-weld will be fused into weld seam, the welding wire and technique of tack welding are identical with formally welding；
C3 tack welding) is carried out to tubing：When from spot welding group pair, tack welding solder joint should be avoided in tubing clock position
3rd, six, nine, 12 points；When from solid point block group pair, tack-weld falls should avoid in tubing in mother metal outer surface, solid point block
Three, six, nine, 12 points of clock position, and the number of solid point block is even number and circumference uniform distribution is on tubing；
C4 tack welding quality) is checked：When from spot welding group pair, solid point throat depth 3-5mm, length 5-15mm, solid point
If defective must polish of solder joint removes again tack welding again, groove root tack-weld both ends are polished into gentle slope after tack welding
Type；When being fixed from solid point block, solid point throat depth 4-8mm, length 25-55mm, tack-weld fall in pipe outer surface；
D, extraneous objective factor is checked before welding；
E, manual welding, using straight polarity direct current, leftward welding, multiple tracks vertical-up welding connects, specifically include it is following step by step：
E1) determine that welding procedure meets following parameter：Weld metal thickness G T.GT.GT 1.5mm；Welding current 60-140A；Welding
Voltage 10-14V；Speed of welding 5-12cm/min；Front protecting gas flow 10-25L/min；Reverse side shield gas flow rate 10-
15L/min；When environment temperature is -20-0 DEG C, minimum preheating temperature is more than 15 DEG C, and temperature is small between the highest road of per pass welding
In equal to 100 DEG C；Backing run and middle welding bead need cleaning of polishing；
E2 the welding position, starting the arc position and welding direction of backing welding) are determined：Circumference according to the fixed tubing of level is cut
Face is divided, and bottom position is defined as into 6 positions, tip position is defined as into 12 positions, and divide and manage according to clock and watch scale
Material section, welding direction：6 points → 3 points → 12 points；6 points → 9 points → 12 points, and define the traffic direction of welding is defined as before；
Starting welding position is taken in 10~20mm of rear side positions of 6 positions of distance；
E3) backing welding：
E31) when using spot welding group butt welding seam welding, soldering turret hand handle line is held from starting the arc position across arm rear right hand
The starting the arc moves backward to starting welding position again with or → → 12 traffic direction welding and general at 6 points → 3 points → 12 points at 6 points at 9 points
Solid point weld seam is dissolved into backing welding molten bath；Again with same welding manner with 6 points → 9 points → 12 or 6 points → 3 points → 12 points of fortune
Line direction welding simultaneously dissolves into solid point weld seam in backing welding molten bath；Finally joint, formation near 12 points by two sections of backing runs
Whole piece backing welding deposited metal welding bead；
E32) when using solid point block, soldering turret hand handle line is held from the starting the arc of starting the arc position across arm rear right hand and is moved rearwards
Moved again to 9 positions to the starting welding position of 10~20mm of rear side positions of 6 positions of distance until running into the point in front
Gu block stops forming first paragraph backing welding deposited metal welding bead；Again with same welding manner in 3 positions of tubing to 12 points
Between position second segment backing welding deposited metal welding bead is formed about close to 12 points；First paragraph backing welding deposited metal welding bead and
Two sections of backing welding deposited metal welding beads are symmetrical；It is moved rearwards and first paragraph backing welding from starting the arc position with same welding manner again
After deposited metal welding bead plays solder joint joint, then to 3 positions movements until the solid point block for running into front stops forming the 3rd section and beaten
Back welding deposited metal welding bead；Again with same welding manner in 9 positions of tubing to close 12 neighbouring shapes between 12 positions
Into the 4th section of backing welding deposited metal welding bead that acnode phase joint is received with second segment backing welding deposited metal welding bead, the 3rd section of bottoming
Weld deposited metal welding bead and the 4th section of backing welding deposited metal welding bead is symmetrical；So far first paragraph backing welding deposited metal welding bead and
Three sections of backing welding deposited metal welding beads form the backing welding deposited metal welding bead of 6 bands of position, second segment backing welding deposition gold
Belong to welding bead and the 4th section of backing welding deposited metal welding bead forms the backing welding deposited metal welding bead of 12 bands of position, then by 6 points
The solid point block at the both ends of the backing welding deposited metal welding bead of the band of position, the backing welding deposited metal welding bead of 12 bands of position
The solid point block at both ends removes；If also solid point block, then with the same welding manner solid point between 6 points of points of -9- points -12 respectively
Between block, backing welding deposited metal welding bead is formed between the solid point block between 6. -3. -12；When symmetrical backing welding
Deposited metal welding bead removes the solid point block at symmetrical backing welding deposited metal welding bead both ends after being formed, and symmetric position welding, presses
According to 6 points of dot sequency directions of -9- points -12 or 6. -3. -12 dot sequency directions, from the backing run of welding before receives acnode
Weldering, solder joint joint is played with the backing run of welding before front, finally by the multistage bottoming deposited metal welding bead joint at interval, shape
Into whole piece bottoming deposited metal welding bead；
E4) according to backing welding identical welding direction, molten bath is longer than among weld seam in the groove both sides residence time, is beating
Second layer deposited metal, joint location and the backing welding deposited metal of second layer deposited metal are formed on back welding deposited metal welding bead
The joint location of welding bead staggers；
E5) the later deposited metals of the second layer include at least one of deposited metals, and per pass deposited metals are according to backing welding
The welding of welding direction, molten bath is longer to ensure groove face and interlayer penetration than among weld seam in the both sides residence time, later layer
The joint of deposited metals joint and preceding layer deposited metals staggers；
E6) in whole welding process, welding torch porcelain mouth lower support is on root groove face, as fulcrum, electrode holder of holding with a firm grip,
Wrist does uniform circular arcs motion, drives electrode holder in the range of 70 °~85 ° of tungsten filament pressure cap axial direction, using porcelain mouth fulcrum as summit, tungsten
Extreme pressure cap and argon arc arc column do circular cone and swing and advance, and with the shaping of weld seam, the face of weld with red heat is transferred in porcelain mouth bottom
To support smoothly reach, for the convex height of root in the range of 2mm, overhead weld position welding wire termination is sent to the root of groove, water
Flat vertical go up a slope to downhand position welding wire termination of fixed weld bond is only fed to melt tank edge；
E7) welding manner during joint is：The starting the arc in 10mm or so groove before joint location, is then moved back to and connects
Head gentle slope position top, electric arc, to ensure that both sides fuse, after being formed after molten bath, control molten bath size in the groove both sides residence time
Silk gradually is given, molten iron fills up molten bath both sides melt run edge, and then moving forward makes molten bath move forward, and weld seam gradually extends；
F, each objective factor of welding is checked in welding process；
G, postwelding inspection.
As a kind of preferable scheme, the removal of the solid point block is removed using electric angle grinder polishing.
Extraneous objective factor, which check, as a kind of preferable scheme, before welding in the step D includes lacking groove
Fall into, the inspection of parameter；The inspection of welding place humidity, temperature, wind speed；Prevent the inspection of draught measure in pipe；Tack-weld
The inspection of quality；Welding deformation and reversible deformation measure, prevent spatter thing from staiing the inspection of the measure on weldment surface；Welding field
Institute, the inspection of work equipment, fixture.
As a kind of preferable scheme, step G postwelding inspections include
G1) visual examination, 100% outward appearance self-test after the completion of weld seam；
G2 scar when removing solid point block) is checked, if polish flat, carry out PT inspections if necessary, eliminate surface defect；
G3 ray detection) is carried out according to the design requirement of process pipe.
After employing above-mentioned technical proposal, effect of the invention is：The welding procedure is reasonable, and welding difficulty is low, and porcelain mouth begins
There is a relatively-stationary fulcrum eventually, welder easily practises amplitude, frequency and the fltting speed of the circular motion of wrist skillfully,
Electric arc can be uniformly controlled equably to control arc length, uniformly control speed of welding in the residence time on groove both sides,
Effectively ensure that heat input input is relatively uniform.Because heat input is more uniform, the molten hole size of molten bath and front end is also uniform, coordinates
Effectively wire feed and joint control technology, it is ensured that degree and uniform convex height are in the range of 2mm thoroughly for root, and electric arc is in groove two
Side residence time long enough, to ensure that molten bore edges are filled up by molten iron, the anti-undercut defect of inwall is avoided the occurrence of, and shown on egative film
It is shown as zigzag and does not merge defect, using the mode welding being symmetrically welded during backing welding, process duct after solid point block corresponding to removal
The group of material is to still more firm so that welding difficulty is low, and the intensity of backing welding is high, and welding effect is good, and the second layer is later to be melted
Molten bath is slightly longer than among weld seam in the groove both sides residence time when covering metal formation, to ensure groove face penetration and avoid first layer
Weld metal is collapsed or burnt, it is also ensured that groove face and interlayer penetration.
Embodiment
Below by specific embodiment, the present invention is described in further detail.
A kind of nickel alloy process pipe Manual argon-arc welding, comprises the following steps：
A, welding preparation, including it is following step by step：
A1) select tools：Argon-arc torch, a diameter of 40-50mm from 75 °2Length is 3-4m hand handles wire, diameter
2.0mm or 2.4mm cerium tungsten electrode, the tip of cerium tungsten electrode are processed as the truncated cone of 35 ° -45 ° of taper, and the roundlet of truncated cone is straight
Footpath is 0.8-1.0mm, and cerium tungsten electrode is 6-8mm with respect to the extension elongation of the porcelain mouth of argon-arc torch；
A2) the acceptance of tubing and instrument：Check the trade mark and specification of tubing, it is ensured that the tubing trade mark is N08825, directly
Footpath D>Φ 13mm, δ>1.5mm；Check whether the measurement instrument of DC argon arc welding torch and argon flow amount meter has been demarcated and in the term of validity
It is interior, check whether purity of argon is 99.99%, check whether welding wire surface cleans, welding wire surface cleaning treatment, if necessary with third
Ketone cleans；Whether tubing, the acceptance of welding wire physical and chemical parameter are qualified；
A3) tubing is rule and carries out dimensional gaughing；
A4) to tubing cutting stock, otch end face and the perpendicularity of tubing axis are ensured；
A5) to the otch end face finished edge for two tubing that need to be welded, make the bevel angle sums of two tubing for 56 °-
65 °, root face 0.5-1mm；
A6 it is) that eliminating impurities in groove surfaces externally and internally 20mm are clean, expose metallic luster；
A7) check whether the argon-filling device operation inside tubing meets technological requirement；
B, two tubing that weld will be needed to be grouped, including it is following step by step：
B1) confirmation group to tooling fixture it is identical with tubing material or identical group when using solid point block, it is necessary to also will
Solid point block used in confirmation is identical with tubing material or identical group；
B2) confirmation group is less than the 10% of wall thickness, and is less than or equal to 1mm to pipeline section axiality, interior misalignment；
B3) by two tubing horizontal groups pair, the group at the point of tubing clock position six is 2.4mm to gap, the group at ten two points
3.2mm is more than to gap, it is uniform 2.4mm to gap to horizontally rotate weld bond group, and horizontal position weld bond group is uniform to gap
2.4mm；In order to facilitate description, tubing section is divided according to clock position, is observed and is faced section and be in bottom
For 6 positions, tip position is ten two positions.
C, by two tubing carry out tack welding, including it is following step by step：
C1) determine group to mode：As caliber Φ 13mm ＜ D ＜ Φ 168.3mm, from spot welding group to fixed or solid point block
Group is to fixation；As D >=Φ 168.3mm, from solid point block group to fixation；
C2) when from spot welding group pair, before the welding of groove root tack-weld, determine that back side argon filling purity meets welding and wanted
Ask, groove root tack-weld will be fused into weld seam, and the welding wire and technique of tack welding are identical with formally welding；
C3) when from spot welding group pair, tack welding solder joint should avoid three, six, nine, 12 points in tubing clock position；
When from solid point block group pair when, tack-weld falls in mother metal outer surface, solid point block should avoid tubing clock position three, six,
9th, ten two points, reduce difficult locations joint and cause quality risk, and the number of solid point block is even number and circumference uniform distribution is in tubing
On；
C4 tack welding quality) is checked：When from spot welding group pair, solid point throat depth 3-5mm, length 5-15mm, solid point
If defective must polish of solder joint removes again tack welding again, groove root tack-weld both ends are polished into gentle slope after tack welding
Type；When being fixed from solid point block, solid point throat depth 4-8mm, length 25-55mm, tack-weld fall in pipe outer surface, point
Gu if solder joint has the defects of crackle to polish removal；
D, extraneous objective factor is checked before welding；It includes the inspection to groove defect, parameter；Welding place is wet
The inspection of degree, temperature, wind speed；Prevent the inspection of draught measure in pipe；The inspection of tack-weld quality；Welding deformation and contravariant
Shape measure, prevent spatter thing from staiing the inspection of the measure on weldment surface；Welding place, the inspection of work equipment, fixture.
E, manual welding, using straight polarity direct current, leftward welding, multiple tracks vertical-up welding connects, specifically include it is following step by step：
E1) determine that welding procedure meets following parameter：Weld metal thickness G T.GT.GT 1.5mm；Welding current 60-140A；Welding
Voltage 10-14V；Speed of welding 5-12cm/min；Front protecting gas flow 10-25L/min；Reverse side shield gas flow rate 10-
15L/min；When environment temperature is -20-0 DEG C, minimum preheating temperature is more than 15 DEG C, and temperature is small between the highest road of per pass welding
In equal to 100 DEG C；Backing run and middle welding bead need cleaning of polishing；
E2 the welding position, starting the arc position and welding direction of backing welding) are determined：Circumference according to the fixed tubing of level is cut
Face is divided, and bottom position is defined as into 6 positions, tip position is defined as into 12 positions, and divide and manage according to clock and watch scale
Material section, welding direction：6 points → 3 points → 12 points；6 points → 9 points → 12 points, and define the traffic direction of welding is defined as before；
Starting welding position is taken in 10~20mm of rear side positions of 6 positions of distance；
E3) backing welding：
E31) when using spot welding group butt welding seam welding, soldering turret hand handle line is held from starting the arc position across arm rear right hand
Arc move backward to starting welding position again with 6 points → 3 points → 12 points or 6 points → 9 points → 12 traffic direction welding and by point
Gu weld seam is dissolved into backing welding molten bath；Again with same welding manner with 6 points → 9 points → 12 or 6 points → 3 points → 12 points of operation
Direction welding simultaneously dissolves into solid point weld seam in backing welding molten bath；Finally by two sections of backing runs, joint, formation are whole near 12 points
Bar backing welding deposited metal welding bead；The bottoming deposited metals welding bead has multistage deposited metals to connect to being formed, and keeps away joint location
Snap and connect difficult locations；
E32) when using solid point block, soldering turret hand handle line is held from the starting the arc of starting the arc position across arm rear right hand and is moved rearwards
Moved again to 9 positions to the starting welding position of 10~20mm of rear side positions of 6 positions of distance until running into the point in front
Gu block stops forming first paragraph backing welding deposited metal welding bead；Again with same welding manner in 3 positions of tubing to 12 points
Between position second segment backing welding deposited metal welding bead is formed about close to 12 points；First paragraph backing welding deposited metal welding bead and
Two sections of backing welding deposited metal welding beads are symmetrical；It is moved rearwards and first paragraph backing welding from starting the arc position with same welding manner again
After deposited metal welding bead plays solder joint joint, then to 3 positions movements until the solid point block for running into front stops forming the 3rd section and beaten
Back welding deposited metal welding bead；Again with same welding manner in 9 positions of tubing to close 12 neighbouring shapes between 12 positions
Into the 4th section of backing welding deposited metal welding bead that acnode phase joint is received with second segment backing welding deposited metal welding bead, the 3rd section is beaten
Back welding deposited metal welding bead and the 4th section of backing welding deposited metal welding bead are symmetrical；So far first paragraph backing welding deposited metal welding bead and
3rd section of backing welding deposited metal welding bead forms the backing welding deposited metal welding bead of 6 bands of position, second segment backing welding deposition
Metal welding bead and the 4th section of backing welding deposited metal welding bead form the backing welding deposited metal welding bead of 12 bands of position, then by 6
Solid point block, the backing welding deposited metal welding bead of 12 bands of position at the both ends of the backing welding deposited metal welding bead of the point band of position
Both ends solid point block remove；If also solid point block, then with the same welding manner point between 6 points of points of -9- points -12 respectively
Gu between block, backing welding deposited metal welding bead is formed between the solid point block between 6. -3. -12；When symmetrical bottoming
Weldering deposited metal welding bead removes the solid point block at symmetrical backing welding deposited metal welding bead both ends after being formed, symmetric position welding,
According to 6 points of dot sequency directions of -9- points -12 or 6. -3. -12 dot sequency directions, from the backing run of welding before receives acnode
Weldering, solder joint joint is played with the backing run of welding before front, finally by the multistage bottoming deposited metal welding bead joint at interval, shape
Into whole piece bottoming deposited metal welding bead；By taking four solid point blocks as an example, solid point block be distributed in respectively 6. -3 points, 6. -9 points it
Between, between 9. -12 points, between 3. -12 points, define between 6. -3 points for A solid point blocks, between 6. -9 points for B solid points
Block, between 9. -12 points for C solid point blocks, between 3. -12 points for D solid point blocks；Therefore during backing welding, welding position is originated
For 6 points of inclined 3 point 10-20mm, now originate the front starting the arc position starting the arc of welding position and then move backward to starting welding position
Put, then move to form first paragraph bottoming deposited metals to B solid point blocks again；Then again with same welding manner in D solid points
Second segment bottoming deposited metals are formed between block and 12 positions, the welding direction of the formation of second segment bottoming deposited metals is also
Meet total welding direction, i.e., moved from D solid points block to 12 positions, receive arc position be in 12 positions and C solid points block it
Between；Then the 3rd section of bottoming deposited metals, the 3rd section of bottoming are being formed between 6 positions and A solid point blocks in the same way
The solder joint joint with first paragraph bottoming deposited metals is needed during deposited metals formation；Then again in C solid points block and 12 positions
The 4th section of bottoming deposited metals of formation, the receipts acnode joint of second segment bottoming deposited metals and the 4th section of bottoming deposited metals,
4th section of bottoming deposited metals and the 3rd section of bottoming deposited metals are symmetrical.Then A, B, C, D solid point block are removed.And if now point
Gu the quantity of block is not four, for example, also having E solid point blocks between B solid points block, C solid point blocks, in A solid points block, D solid point blocks
Between also have F solid point blocks, now equally by A, B, C, D solid point block remove, then again in E solid point blocks in the way of being symmetrically welded
Between B points position, formed between F solid points block and D points position and mutually pile bottoming deposited metals, then in E solid points block and C points position
Symmetrical bottoming deposited metals are formed between putting, between F solid points block and A points position, then remove E, F solid point block,
Then again by each section of bottoming deposited metals joint；
E4) according to backing welding identical welding direction, i.e., and need to meet the major premise that vertical-up welding connects, molten bath exists
The groove both sides residence time is longer than among weld seam, to ensure that molten bore edges are filled up by molten iron, avoids the occurrence of the anti-undercut defect of inwall,
Ensure groove face penetration and avoid first layer weld metal from collapsing or burn.The second layer is formed on backing welding deposited metal welding bead
Deposited metal, the joint location and the joint location of backing welding deposited metal welding bead of second layer deposited metal stagger；
E5) the later deposited metals of the second layer include at least one of deposited metals, and per pass deposited metals are according to backing welding
The welding of welding direction, molten bath is longer to ensure groove face and interlayer penetration than among weld seam in the both sides residence time, later layer
The joint of deposited metals joint and preceding layer deposited metals staggers；
E6) in whole welding process, i.e. the either shape of the later deposited metals of backing welding or the second layer or the second layer
Cheng Jun is adopted in a like fashion, and welding torch porcelain mouth lower support is on root groove face, and as fulcrum, electrode holder of holding with a firm grip, wrist is done
Uniform circular arcs move, and drive electrode holder in the range of 70 °~85 ° of tungsten filament pressure cap axial direction, using porcelain mouth fulcrum as summit, tungsten electrode pressure cap
And argon arc arc column does circular cone and swings and advance, with the shaping of weld seam, porcelain mouth bottom is transferred using the face of weld of red heat as support
Smoothly reach, the convex height of root is in the range of 2mm, and overhead weld position welding wire termination is sent to the root of groove, in avoiding
It is recessed, form satisfied convex；Vertical go up a slope to downhand position welding wire termination of the fixed weld bond of level is only fed to melt tank edge, to avoid
Overlap, downhand welding pay attention to controlling the speed of service of electrode holder, control molten bath size, to avoid producing overlap；The wire feeding mode of welding wire has
Two kinds：1. during using drop incontinuous wire fill method wire feed, after welding wire removes molten bath, welding wire termination hot junction must not remove gas shield
Area, anti-oxidation；When the 2nd, using continuous wire feed method, welding wire termination is kept without departing from molten bath, and it is constantly uniform toward in molten bath
Wire feed.Notice that wire feed is steady, prevent welding wire from being contacted with high temperature tungsten electrode, cause tungsten electrode to be contaminated, scaling loss, it is steady also to destroy electric arc
It is qualitative.Welding wire termination should steadily be sent into molten bath, avoid bringing air into molten bath because too fast too quickly and producing stomata.
E7) welding manner during joint is：The starting the arc in 10mm or so groove before joint location, is then moved back to and connects
Head gentle slope position top, electric arc, to ensure that both sides fuse, after being formed after molten bath, control molten bath size in the groove both sides residence time
Silk gradually is given, molten iron fills up molten bath both sides melt run edge, and then moving forward makes molten bath move forward, and weld seam gradually extends；
F, each objective factor of welding is checked in welding process；Its content mainly includes：Check power type, pole
Whether property meets technological requirement；Check whether purity of argon and flow meet technological requirement；Whether back side argon filling meets technique will
Ask；Before backing run sealing, the quality of root shaping is overhauled, unqualified place polishes off, then welded again in time, until
It is qualified；Check whether welding current, voltage, welding speed meet technological requirement；Whether temperature, interlayer temperature meet between inspection road
Technological requirement；Multi-pass welding, joint stagger；Per pass and interlayer are soldered 100% outward appearance self-test, remove face crack, stomata
And slag inclusion, one of appearance of weld and the groove of welding quality under the influence of removing, remove joint bad position and harmful reinforcement be high,
Actively receive quality testing department process inspection；Whether nickel alloy solid point block is removed using electric angle grinder polishing；
G, postwelding inspection.Step G postwelding inspections include
G1) visual examination, 100% outward appearance self-test after the completion of weld seam；
G2 scar when removing solid point block) is checked, if polish flat, carry out PT inspections if necessary, eliminate surface defect；
G3 ray detection) is carried out according to the design requirement of process pipe.
When welding N08825 nickel alloy process pipes using the welding procedure, appearance of weld is attractive in appearance, and weldering line is uniform, heat input
Small, dense structure is measured, weldquality is stable, and welding difficulty is low.
Embodiment described above is only the description to the preferred embodiment of the present invention, not as the limit to the scope of the invention
It is fixed, the various modifications made on the basis of design spirit of the present invention is not departed to technical solution of the present invention and transformation, it all should fall
In the protection domain for entering claims of the present invention determination.
Claims (4)
1. a kind of nickel alloy process pipe Manual argon-arc welding, comprises the following steps：
A, welding preparation, including it is following step by step：
A1) select tools：Argon-arc torch, a diameter of 40-50mm from 75 °2Length be 3-4m hand handles wire, diameter 2.0mm or
2.4mm cerium tungsten electrode, the tip of cerium tungsten electrode are processed as the truncated cone of 35 ° -45 ° of taper, and the axis of small circle of truncated cone is
0.8-1.0mm, cerium tungsten electrode are 6-8mm with respect to the extension elongation of the porcelain mouth of argon-arc torch；
A2) the acceptance of tubing and instrument：Check the trade mark and specification of tubing, it is ensured that the tubing trade mark is N08825, diameter D>
Φ 13mm, thickness δ>1.5mm；Check whether the measurement instrument of DC argon arc welding torch and argon flow amount meter has been demarcated and in the term of validity
It is interior, check whether purity of argon is 99.99%, check whether welding wire surface cleans, the acceptance of tubing, welding wire physical and chemical parameter
It is whether qualified；
A3) tubing is rule and carries out dimensional gaughing；
A4) to tubing cutting stock, otch end face and the perpendicularity of tubing axis are ensured；
A5) to the otch end face finished edge for two tubing that need to be welded, the bevel angle sum for making two tubing is 56 ° -65 °, blunt
While it is 0.5-1mm；
A6 it is) that eliminating impurities in the range of groove surfaces externally and internally 20mm are clean, expose metallic luster；
A7) check whether the argon-filling device operation inside tubing meets technological requirement；
B, two tubing that weld will be needed to be grouped, including it is following step by step：
B1) confirmation group to tooling fixture it is identical with tubing material or identical group when using solid point block, it is necessary to will also confirm
Solid point block used is identical with tubing material or identical group；
B2) for confirmation group to pipeline section axiality, interior misalignment is less than the 10% of wall thickness, and is less than or equal to 1mm；
B3) by two tubing horizontal groups pair, the group at the point of tubing clock position six is 2.4mm to gap, between the group pair at ten two points
Gap is more than 3.2mm, and it is uniform 2.4mm to gap to horizontally rotate weld bond group, and horizontal position weld bond group is uniform to gap
2.4mm；
C, by two tubing carry out tack welding, including it is following step by step：
C1) determine group to mode：As caliber Φ 13mm ＜ D ＜ Φ 168.3mm, from spot welding group to fixed or solid point block group pair
It is fixed；As D >=Φ 168.3mm, from solid point block group to fixation；
C2) when from spot welding group pair, before the welding of groove root tack-weld, determine that back side argon filling purity meets welding requirements,
Groove root tack-weld will be fused into weld seam, and the welding wire and technique of tack welding are identical with formally welding；
C3) when from spot welding group pair, tack welding solder joint should avoid three, six, nine, 12 points in tubing clock position；It is elected
During with solid point block group pair, tack-weld falls in mother metal outer surface, and solid point block should be avoided three, six, nine, the ten of tubing clock position
2 points, and the number of solid point block is even number and circumference uniform distribution is on tubing；
C4 tack welding quality) is checked：When from spot welding group pair, solid point throat depth 3-5mm, length 5-15mm, tack-weld
If defective must polish removes again tack welding again, groove root tack-weld both ends are polished into gentle slope type after tack welding；
When being fixed from solid point block, solid point throat depth 4-8mm, length 25-55mm, tack-weld fall in pipe outer surface；
D, extraneous objective factor is checked before welding；
E, manual welding, using straight polarity direct current, leftward welding, multiple tracks vertical-up welding connects, specifically include it is following step by step：
E1) determine that welding procedure meets following parameter：Weld metal thickness G T.GT.GT 1.5mm；Welding current 60-140A；Weldingvoltage
10-14V；Speed of welding 5-12cm/min；Front protecting gas flow 10-25L/min；Reverse side shield gas flow rate 10-15L/
min；Environment temperature be -20-0 DEG C when, minimum preheating temperature be more than 15 DEG C, per pass welding highest road between temperature be less than etc.
In 100 DEG C；The polishing cleaning of the needs of backing run and middle welding bead；
E2 the welding position, starting the arc position and welding direction of backing welding) are determined：Circumferential section according to the fixed tubing of level is drawn
Point, bottom position is defined as 6 positions, tip position is defined as 12 positions, and cut according to clock and watch scale division tubing
Face, welding direction：6 points → 3 points → 12 points；6 points → 9 points → 12 points, and define the traffic direction of welding is defined as before；Starting
Welding position is taken in 10~20mm of rear side positions of 6 positions of distance；
E3) backing welding：
E31) when using spot welding group butt welding seam welding when, soldering turret hand handle line across arm rear right hand hold from the starting the arc of starting the arc position to
Be moved to starting welding position afterwards again with 6 points → 3 points → 12 points or 6 points → 9 points → 12 traffic direction welding and by tack welding
Seam is dissolved into backing welding molten bath；Again with same welding manner with 6 points → 9 points → 12 or 6 points → 3 points → 12 points of traffic direction
Welding simultaneously dissolves into solid point weld seam in backing welding molten bath；Finally by two sections of backing runs, joint, formation whole piece are beaten near 12 points
Back welding deposited metal welding bead；
E32) when using solid point block group butt welding seam welding, soldering turret hand handle line is held from the starting the arc of starting the arc position across arm rear right hand
The starting welding position of 10~20mm of rear side positions of 6 positions of distance is moved backward to again to 9 position movements until running into
The solid point block in front stops forming first paragraph backing welding deposited metal welding bead；Again with same welding manner in 3 point positions of tubing
Put between 12 positions and be formed about second segment backing welding deposited metal welding bead close to 12 points；First paragraph backing welding deposited metal
Welding bead and second segment backing welding deposited metal welding bead are symmetrical；It is moved rearwards and first from starting the arc position with same welding manner again
After section backing welding deposited metal welding bead plays solder joint joint, then to 3 position movements until the solid point block for running into front stops being formed
3rd section of backing welding deposited metal welding bead；Again with same welding manner in 9 positions of tubing to close between 12 positions
12 are formed about receiving the 4th section of backing welding deposited metal welding bead of acnode phase joint with second segment backing welding deposited metal welding bead, the
Three sections of backing welding deposited metal welding beads and the 4th section of backing welding deposited metal welding bead are symmetrical；So far first paragraph backing welding deposited metal
Welding bead and the 3rd section of backing welding deposited metal welding bead form the backing welding deposited metal welding bead of 6 bands of position, second segment bottoming
Weld deposited metal welding bead and the 4th section of backing welding deposited metal welding bead form the backing welding deposited metal welding bead of 12 bands of position,
It is again that the backing welding deposition of the solid point block at the both ends of the backing welding deposited metal welding bead of 6 bands of position, 12 bands of position is golden
The solid point block for belonging to the both ends of welding bead removes；If also solid point block, then with same welding manner respectively 6 points of points of -9- points -12 it
Between solid point block between, between the solid point block between 6. -3. -12 formed backing welding deposited metal welding bead；When symmetrical
Backing welding deposited metal welding bead formed after the solid point block at symmetrical backing welding deposited metal welding bead both ends is removed, symmetric position
Welding, according to 6 points of dot sequency directions of -9- points -12 or 6. -3. -12 dot sequency directions, arc is received from the backing run of welding before
Weldering is lighted, solder joint joint is played with the backing run of welding before front, finally connects the multistage bottoming deposited metal welding bead at interval
Head, form whole piece bottoming deposited metal welding bead；
E4) according to backing welding identical welding direction, molten bath is longer than among weld seam in the groove both sides residence time, in backing welding
Second layer deposited metal, joint location and the backing welding deposited metal welding bead of second layer deposited metal are formed on deposited metal welding bead
Joint location stagger；
E5) the later deposited metals of the second layer include at least one of deposited metals, per pass deposited metals applying according to backing welding
Direction welding is welded, molten bath is longer to ensure groove face and interlayer penetration, the cladding of later layer than among weld seam in the both sides residence time
The joint of metal joint and preceding layer deposited metals staggers；
E6) in whole welding process, welding torch porcelain mouth lower support is on root groove face, as fulcrum, electrode holder of holding with a firm grip, and wrist
Uniform circular arcs motion is done, drives electrode holder in the range of 70 °~85 ° of tungsten filament pressure cap axial direction, using porcelain mouth fulcrum as summit, tungsten electrode pressure
Cap and argon arc arc column do circular cone and swing and advance, and with the shaping of weld seam, porcelain mouth bottom is transferred using the face of weld of red heat as branch
Support smoothly reach, for the convex height of root in the range of 2mm, overhead weld position welding wire termination is sent to the root of groove, and level is solid
Determine vertical go up a slope to downhand position welding wire termination of weld bond and be only fed to melt tank edge；
E7) welding manner during joint is：The starting the arc in 10mm or so groove before joint location, then it is moved back to joint and delays
Slope position top, electric arc is longer to ensure that both sides fuse than among weld seam in the groove both sides residence time, after being formed after molten bath, control
Molten bath size gradually gives silk, and molten iron fills up molten bath both sides melt run edge, and then moving forward makes molten bath move forward, and weld seam is gradual
Extend；
F, each objective factor of welding is checked in welding process；
G, postwelding inspection.
A kind of 2. nickel alloy process pipe Manual argon-arc welding as claimed in claim 1, it is characterised in that：Institute
The removal for stating solid point block is removed using electric angle grinder polishing.
A kind of 3. nickel alloy process pipe Manual argon-arc welding as claimed in claim 2, it is characterised in that：Institute
State and extraneous objective factor is carried out before welding in step D to check the inspection included to groove defect, parameter；Welding place humidity, temperature
Degree, the inspection of wind speed；Prevent the inspection of draught measure in pipe；The inspection of tack-weld quality；Welding deformation and reversible deformation are arranged
Apply, prevent spatter thing from staiing the inspection of the measure on weldment surface；Welding place, the inspection of work equipment, fixture.
A kind of 4. nickel alloy process pipe Manual argon-arc welding as claimed in claim 3, it is characterised in that：Step
Rapid G postwelding inspections include
G1) visual examination, 100% outward appearance self-test after the completion of weld seam；
G2 scar when removing solid point block) is checked, if polish flat, carry out PT inspections if necessary, eliminate surface defect；
G3 ray detection) is carried out according to the design requirement of process pipe.
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| CN112719520A (en) * | 2020-12-17 | 2021-04-30 | 江苏利柏特股份有限公司 | Martensitic alloy steel process pipeline manual argon-electric combined welding and heat treatment process |
| CN112658443B (en) * | 2020-12-17 | 2022-07-15 | 江苏利柏特股份有限公司 | Manual argon tungsten-arc welding process method for steel-aluminum connector |
| CN114000662A (en) * | 2021-10-25 | 2022-02-01 | 中国建筑第五工程局有限公司 | Skylight structure and seamless welding method for aluminum-magnesium-manganese plate |
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| JP2000190076A (en) * | 1998-12-25 | 2000-07-11 | Mitsubishi Chemical Engineering Corp | Tig welding method for pipe |
| WO2004113009A2 (en) * | 2003-06-19 | 2004-12-29 | T.C. Tac, S.L. | Aluminium welding method |
| CN102528238B (en) * | 2012-01-18 | 2013-09-04 | 江苏中核利柏特股份有限公司 | Manual argon-arc welding process of tungsten electrode |
| CN102554402B (en) * | 2012-01-18 | 2013-11-20 | 江苏中核利柏特股份有限公司 | Welding and heat treatment processes of large-diameter and thick-wall nuclear process pipes |
| CN102528237B (en) * | 2012-01-18 | 2013-09-04 | 江苏中核利柏特股份有限公司 | Welding process for carbon steel process pipeline |
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