CN108213657A - A kind of assembled welding process method of P92 heat resisting steel - Google Patents
A kind of assembled welding process method of P92 heat resisting steel Download PDFInfo
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- CN108213657A CN108213657A CN201611144872.0A CN201611144872A CN108213657A CN 108213657 A CN108213657 A CN 108213657A CN 201611144872 A CN201611144872 A CN 201611144872A CN 108213657 A CN108213657 A CN 108213657A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to a kind of welding technique, especially a kind of assembled welding process method of P92 heat resisting steel belongs to the technical field of welding.The assembled welding process method of the P92 heat resisting steel includes：2. 1. 3. post weld heat treatment is welded in welding preparation, the present invention process first with GTAW arc stability, heat is concentrated, controlling is good, the characteristics of quality, make a call to the welding of the 1st bottom and the 2nd layer of filled layer, it recycles easy to operate, the high GMAW welding methods of deposition efficiency carry out the welding of remaining filled layer and capping layer, multilayer multiple tracks thin layer is used during welding, low_input_power, rapid welding and welding point such as are staggered at the techniques, postwelding weldment is cooled to 80 DEG C ~ 100 DEG C, and the measures such as stress-removal heat treatment are carried out after keeping the temperature 1 ~ 2 hour, weldquality and welding efficiency is made all to be guaranteed.
Description
Technical field
The present invention relates to a kind of welding technique, especially a kind of assembled welding process method of P92 heat resisting steel belongs to
The technical field of welding.
Background technology
P92 steel is widely used in due to its good corrosion resistance and very high creep rupture strength at high temperatures
In the gigawatt unit of numerous domestic.As a kind of new type steel that significant role is played in extra-supercritical unit, P92 steel
Welding procedure also necessarily become and need the subject of primary study.In the prior art, Patent No. ZL200610051883.4
Patent of invention discloses a kind of process for welding P92 steel, which is welding all bottoms, filled layer and capping layer
Shi Jun uses GMAW welding methods, but the P92 steel weldqualities for welding out only with a kind of this welding method are unstable, and welds
It connects inefficient.
Invention content
It is an object of the invention to：In view of the problems of the existing technology, propose that one kind can effectively improve weldquality,
And promote a kind of assembled welding process method of P92 heat resisting steel of welding efficiency.
In order to reach object above, the assembled welding process method of P92 heat resisting steel of the invention includes：
Welding preparation
(1) prepare groove, remove groove and its inside and outside oil, rust and other dirts in the range of the 20mm of surface to exposing metal
Gloss；
(2) check whether electricity, gas circuit are unimpeded, and whether welding equipment and GTAW bottoming back side argon-filling device attachment status are good；
(3) temperature between layer, road is preheated using far infrared tracklayer heater to maintain；
Welding
(1) first with GTAW welding arc stablilities, heat is concentrated, and controlling is good, it is quality the characteristics of, using manual tungsten electrode argon
Arc-welding GTAW plays the 1st bottom and the 2nd layer of filled layer, 2.4 × 1000mm of welding wire ER90S-G/ Φ welding；
(2) welding of remaining filled layer and capping layer is secondly carried out using the high GMAW welding methods of easy to operate, deposition efficiency；
Post weld heat treatment
(1) weldment is cooled to 80 DEG C ~ 100 DEG C and carries out stress-removal heat treatment after keeping the temperature 1 ~ 2 hour；
(2) heat treatment of P92 weld bonds is postwelding high temperature hidden lino removal, is added using infrared ray heating method or electromagnetic induction
Hot method；
(3) after weldment is warming up to 300 DEG C, 5500/ δ pwht DEG C/h is not to be exceeded in heating zone heating rate, and is not to be exceeded 220
DEG C/h, minimum is not less than 55 DEG C/h;
(4) when being warming up to 760 DEG C, constant temperature 2 hours, heating and during insulation should control heating zone atmosphere, prevent weldment surface mistake
Degree oxidation;
(5) when weldment temperature is higher than 300 DEG C, 7000/ δ pwht DEG C/h is not to be exceeded in heating zone cooling rate, and is not to be exceeded 280
DEG C/h, minimum is not less than 55 DEG C/h;
(6) below 300 DEG C cooling rate can be disregarded when, but should be cooled down in static air.
The part that is further improved of this patent is to weld the thickness of base material P92 steel used for 20mm.
The process of this patent is first with the arc stability of GTAW, and heat concentration, controlling is good, quality spy
Point, make a call to the welding of the 1st bottom and the 2nd layer of filled layer, recycle the GMAW welding methods easy to operate, deposition efficiency is high into
The welding of remaining filled layer of row and capping layer, when welding, are connect using the thin layer of multilayer multiple tracks, low_input_power, rapid welding and welding
Head such as is staggered at the techniques, and postwelding weldment is cooled to 80 DEG C ~ 100 DEG C, and carries out the measures such as stress-removal heat treatment after keeping the temperature 1 ~ 2 hour,
This allows for being obviously improved, and welding efficiency is also significantly carried using the weldquality that the process of this patent is welded out
It is high.
Description of the drawings
Fig. 1 is groove of the present invention and welding schematic diagram.
Specific embodiment
The assembled welding process method of the P92 heat resisting steel of the present embodiment includes：
Welding preparation
(1) prepare groove 10, remove groove 10 and its inside and outside oil, rust and other dirts in the range of the 20mm of surface to exposing
Metallic luster；
(2) check whether electricity, gas circuit are unimpeded, and whether welding equipment and GTAW bottoming back side argon-filling device attachment status are good；
(3) temperature between layer, road is preheated using far infrared tracklayer heater to maintain；
Welding
(1) it is made a call to before the 1st bottom 1 welds first with argon arc welding and first examines whether groove temperature is more than 150 DEG C, open bottom argon filling
The complete displaced air of device, back side argon shield gas flow rate should be controlled in 20~25L/min, and the argon flow amount of argon-arc welding gun should be protected
Holding the tungsten electrode end in 12~15L/min, welding will be along groove along the point of contact of pipe from weldment distance 2mm or so, welding wire
The front end in molten bath is sent to, using the high temperature in molten bath by wire melting, after arc ignition, is preheated in 10 one end of groove, treats that metal melts
The first drop wire melting metal is sent after change immediately, then electric arc swings to the other end of groove, and wire melting metal is dripped in feeding the 2nd,
Two drop molten iron is made to connect the foundation to form weld seam, then electric arc is swung laterally, and both sides are had a break, and welding wire is equably, discontinuously
Ground is sent into molten bath and gradually welds forward, makes molten hole that should keep going deep into groove per side 0.5mm~1mm or so, is welded in welding process
Silk with tungsten electrode cannot contact or directly go deep into the arc column area of electric arc, otherwise easily cause weld seam tungsten inclusion or destroy arc stability, welding wire
End must not detach argon gas protection zone to avoid oxidation, influence quality, and the axle center of tungsten electrode and weld seam keeps 85 ° or so angles, this
Sample can preferably control the size in molten bath, and nozzle can be made equably to protect molten bath not oxidized, argon arc welding blow-out
Afterwards, suitable time-delay (5~10) s is answered to put out gas, not yet cooling molten bath and tungsten electrode is protected, reduces the degree of oxidation of face of weld；
(2) punch-through and the 1st bottom 1 to prevent from being likely to occur during gas metal-arc welding filling welding aoxidize, and utilize
Argon arc welding carries out making a call to the 2nd layer of filled layer 2 after the welding of the 1st bottom 1, carries out making a call to the 1st bottom with the sander of assembling steel wire lump
Layer inner surface cleaning, and groove temperature is examined to keep the back of the body whether between 150 DEG C ~ 200 DEG C with infrared thermometer or tempilstick
Face argon flow amount should be noted that groove both sides in 12~15L/min, welding in 15~20L/min, the argon flow amount of argon-arc welding gun
Stop and fusing situation, ensure molten bath nature even transition, both sides fusion is good, and disposable welding as possible is completed；
(3) cleaning and the connector of finishing argon arc welding filling layer welding line oxide and local crowning that may be present etc.；
(4) examine 10 temperature of groove should be between 150 DEG C ~ 200 DEG C；
(5) argon-filling device is opened, keeps back side argon flow amount in 15~18L/min, is made with the heat input for preventing GMAW filling welderings
Into the oxidation of back of weld;Opening gas-shielded welder gas detection button, adjusting argon mixture gas flow to 15~20 L/min, so
After reset to welding bonded state, the starting the arc and be transitioned into groove weld area on run-on tab and carry out normal weld, using zigzag or
Crescent swinging method swings molten bath to groove both sides, has a break, middle transition is slightly fast, to prevent weld seam and base material intersection
Angle is generated, speed of welding uniformity pays attention to observation molten bath, keeps the smooth of filler pass, during filling, it should be noted that groove side
Edge should not be by arc scratch, in favor of the welding of capping layer 8；
After the completion of (6) the 3rd layers of filled layer welding, back side argon-filling device is closed, filling layer surface welding slag is removed, modifies local crowning
Connector, examine weld groove side temperature between 150 DEG C ~ 200 DEG C；
(7) continue the welding of 4-5 layers of follow-up filled layer；
(8) the 6th, the foot welding height of 7 filled layers should be less than base material surface 1.5mm~2.0mm, must not melt groove seamed edge；
(9) continue the welding of the 8th layer of capping layer 8, be finally completed welding；
Post weld heat treatment
(1) weldment is cooled to 80 DEG C ~ 100 DEG C and carries out stress-removal heat treatment after keeping the temperature 1 ~ 2 hour；
(2) heat treatment of P92 weld bonds is postwelding high temperature hidden lino removal, is added using infrared ray heating method or electromagnetic induction
Hot method；
(3) after weldment is warming up to 300 DEG C, 5500/ δ pwht DEG C/h is not to be exceeded in heating zone heating rate, and is not to be exceeded 220
DEG C/h, minimum is not less than 55 DEG C/h;
(4) when being warming up to 760 DEG C, constant temperature 2 hours, heating and during insulation should control heating zone atmosphere, prevent weldment surface mistake
Degree oxidation;
(5) when weldment temperature is higher than 300 DEG C, 7000/ δ pwht DEG C/h is not to be exceeded in heating zone cooling rate, and is not to be exceeded 280
DEG C/h, minimum is not less than 55 DEG C/h;
(6) below 300 DEG C cooling rate can be disregarded when, but should be cooled down in static air.
The part that is further improved of this patent is the groove 10 for inverted trapezoidal, and gap 3mm at the starting the arc, the other end receives arc
Locate gap 4mm, root face be less than 1.5mm, 50 °+5 ° of bevel angle, as shown in Figure 1.
Assembling unfitness of butt joint≤the 0.5mm being further improved when part is the preparation groove 10 of this patent.
The part that is further improved of this patent is 1-3 layers of filled layer successively to cover, and layer 4-7 is using the welding that is staggered
Welding method, filled layer covers for successively part, and the 8th layer of capping layer 8 is can cover the 6th, 7 layer of filled layer, during welding, two
The run-on tab of end setting same material, stack pile, when welding material used, technique, welder and preheating temperature and normal weld weld seam
It is identical.
The part that is further improved of this patent is groove both sides temperature range, argon during the welding of the 8th layer of capping layer 8
The flow of mixed gas is same as argon arc welding filled layer, and wire oscillation amplitude suitably increases, and both sides groove seamed edge is made respectively to melt 0.5mm
~1mm is slightly stopped in groove both sides, and to prevent undercut, amplitude of fluctuation and frequency will be adapted, and ensure the surface size of weld seam
It is neat with edge fusion.
The part that is further improved of this patent is that the welding preparation is preheated using far infrared tracklayer heater
Preheating width starts for counterpart center when temperature between layer, road maintains, per 3 times of side weldment thickness, and not less than 100mm;
The minimum widith of insulating layer increases the higher value of 75mm or 3 times of weldment thickness for heater per side；Temperature-control heat couple is mounted on equal
Under heater in warm area, allow thermocouple is installed in a manner that energy storage is welded or is bound, but should be noted that measurement point with adding
It is effective heat-insulated between hot device, hot short circuit is avoided the occurrence of, the heater per side is apart from bevelled edge at least more than 25mm, with convenient
Welding.The measurements such as surface-type thermocouple, infrared radiation thermometer, tempilstick can be used in temperature between preheating temperature and layer, road.Preheating temperature
200 DEG C ~ 250 DEG C, temperature control is at 150 DEG C ~ 200 DEG C between welding layer, road.
This patent is further improved when part is to weld the welding wire that uses as the Wce-20 tungsten electrodes of φ 2.4mm, tungsten electrode
6~8mm of extension elongation, nozzle diameter 10mm.
The part that is further improved of this patent is to weld 9 thickness of P92 steel base material used for 20mm.
The process of this patent is first with the arc stability of GTAW, and heat concentration, controlling is good, quality spy
Point, make a call to the welding of the 1st bottom and the 2nd layer of filled layer, recycle the GMAW welding methods easy to operate, deposition efficiency is high into
The welding of remaining filled layer of row and capping layer, when welding, are connect using the thin layer of multilayer multiple tracks, low_input_power, rapid welding and welding
Head such as is staggered at the techniques, and postwelding weldment is cooled to 80 DEG C ~ 100 DEG C, and carries out the measures such as stress-removal heat treatment after keeping the temperature 1 ~ 2 hour,
This allows for being obviously improved, and welding efficiency is also significantly carried using the weldquality that the process of this patent is welded out
It is high.
Claims (12)
- A kind of 1. assembled welding process method of P92 heat resisting steel, it is characterised in that including：Welding preparation(1) prepare groove, remove groove and its inside and outside oil, rust and other dirts in the range of the 20mm of surface to exposing metal Gloss；(2) check whether electricity, gas circuit are unimpeded, and whether welding equipment and GTAW bottoming back side argon-filling device attachment status are good；(3) temperature between layer, road is preheated using far infrared tracklayer heater to maintain；Welding(1) first with GTAW welding arc stablilities, heat is concentrated, and controlling is good, it is quality the characteristics of, using manual tungsten electrode argon Arc-welding GTAW plays the 1st bottom and the 2nd layer of filled layer, 2.4 × 1000mm of welding wire ER90S-G/ Φ welding；(2) welding of remaining filled layer and capping layer is secondly carried out using the high GMAW welding methods of easy to operate, deposition efficiency；Post weld heat treatment(1) weldment is cooled to 80 DEG C ~ 100 DEG C and carries out stress-removal heat treatment after keeping the temperature 1 ~ 2 hour；(2) heat treatment of P92 weld bonds is postwelding high temperature hidden lino removal, is added using infrared ray heating method or electromagnetic induction Hot method；(3) after weldment is warming up to 300 DEG C, 5500/ δ pwht DEG C/h is not to be exceeded in heating zone heating rate, and is not to be exceeded 220 DEG C/h, minimum is not less than 55 DEG C/h;(4) when being warming up to 760 DEG C, constant temperature 2 hours, heating and during insulation should control heating zone atmosphere, prevent weldment surface mistake Degree oxidation;(5) when weldment temperature is higher than 300 DEG C, 7000/ δ pwht DEG C/h is not to be exceeded in heating zone cooling rate, and is not to be exceeded 280 DEG C/h, minimum is not less than 55 DEG C/h;(6) below 300 DEG C cooling rate can be disregarded when, but should be cooled down in static air.
- 2. the assembled welding process method of a kind of P92 heat resisting steel according to claim 1, it is characterised in that the groove is Inverted trapezoidal, gap 3mm at the starting the arc, the other end receive gap 4mm at arc, and root face is less than 1.5mm, 50 °+5 ° of bevel angle.
- A kind of 3. assembled welding process method of P92 heat resisting steel according to claim 1, it is characterised in that the preparation slope Assembling unfitness of butt joint≤0.5mm during mouth.
- 4. the assembled welding process method of a kind of P92 heat resisting steel according to claim 1, it is characterised in that using manual tungsten Electrode argon arc welding GTAW first examines whether groove temperature is more than 150 DEG C before making a call to the 1st backing weld, and back side argon shield gas flow rate should be controlled For system in 20~25L/min, the argon flow amount of argon-arc welding gun should be maintained at 12~15L/min, during welding tungsten electrode end from weldment away from From 2mm or so, welding wire will be sent to the front end in molten bath along groove along the point of contact of pipe, be melted welding wire using the high temperature in molten bath Change, after arc ignition, preheated in groove one end, send the first drop wire melting metal immediately after metal molten, then electric arc is put To the other end of groove, feeding the second drop wire melting metal makes two drop molten iron connect the foundation to form weld seam, then electric arc is made Horizontal swing, both sides are had a break, and welding wire equably, is intermittently sent into molten bath and gradually welds forward, makes molten hole that should keep deep Entering groove per side 0.5mm~1mm or so, welding wire with tungsten electrode cannot contact or directly go deep into the arc column area of electric arc in welding process, Otherwise it easily causes weld seam tungsten inclusion or destroys arc stability, welding wire end must not detach argon gas protection zone to avoid oxidation, influence matter The axle center of amount, tungsten electrode and weld seam keeps 85 ° or so angles, can preferably control the size in molten bath in this way, and can make spray Mouth equably protects molten bath not oxidized, after argon arc welding blow-out, 5~10S of suitable time-delay is answered to put out gas, protects not yet cooling molten Pond and tungsten electrode reduce the degree of oxidation of face of weld.
- 5. the assembled welding process method of a kind of P92 heat resisting steel according to claim 1, it is characterised in that using manual tungsten The 1st bottom inner surface is carried out with the sander of assembling steel wire lump to clear up, be used in combination when electrode argon arc welding GTAW makes a call to the 2nd layer of filled layer Infrared thermometer or tempilstick examine groove temperature whether between 150 DEG C ~ 200 DEG C, keep back side argon flow amount 15~ 20L/min, the argon flow amount of argon-arc welding gun is in 12~15L/min.
- A kind of 6. assembled welding process method of P92 heat resisting steel according to claim 1-5, it is characterised in that remaining filling Layer is 3-7 layers of filled layer.
- 7. the assembled welding process method of a kind of P92 heat resisting steel according to claim 6, it is characterised in that 1-3 layers are filled out Layer is filled successively to cover, and layer 4-7 is using the welding method for the welding that is staggered, and filled layer is successively partly covers, the 8th layer of capping layer For that can cover the 6th, 7 layer of filled layer, during welding, both ends setting same material, stack pile run-on tab, welding material used, work It is identical when skill, welder and preheating temperature are with normal weld weld seam.
- 8. the assembled welding process method of a kind of P92 heat resisting steel according to claim 7, it is characterised in that described 8th layer Welding when capping layer when groove both sides temperature ranges, argon mixture gas flow be same as argon arc welding filled layer, wire oscillation width Degree is appropriate to be increased, and both sides groove seamed edge is made respectively to melt 0.5mm~1mm, is slightly stopped in groove both sides, to prevent undercut, is swung Amplitude and frequency will be adapted, and ensure that the surface size of weld seam and edge fusion are neat.
- A kind of 9. assembled welding process method of P92 heat resisting steel according to claim 8, it is characterised in that the welding the The step of during the 8th layer of 3-, includes：(1) cleaning and the connector of finishing the 2nd layer of filling layer welding line oxide of argon arc welding and local crowning that may be present etc.；(2) examine groove temperature should be between 150 DEG C ~ 200 DEG C；(3) argon-filling device is opened, keeps back side argon flow amount in 15~18L/min, is made with the heat input for preventing GMAW filling welderings Into the oxidation of back of weld;Opening gas-shielded welder gas detection button, adjusting argon mixture gas flow to 15~20 L/min, so After reset to welding bonded state, the starting the arc and be transitioned into groove weld area on run-on tab and carry out normal weld, using zigzag or Crescent swinging method swings molten bath to groove both sides, has a break, middle transition is slightly fast, to prevent weld seam and base material intersection Angle is generated, speed of welding uniformity pays attention to observation molten bath, keeps the smooth of filler pass, during filling, it should be noted that groove side Edge should not be by arc scratch, in favor of the welding of capping layer；After the completion of (4) the 3rd layers of filled layer welding, back side argon-filling device is closed, filling layer surface welding slag is removed, modifies local crowning Connector, examine weld groove side temperature between 150 DEG C ~ 200 DEG C；(5) continue the welding of 4-5 layers of filled layer；The foot welding height of (6) the 6th, 7 layers of filled layer should be less than base material surface 1.5mm~2.0mm, must not melt groove seamed edge；(7) continue the welding of the 8th layer of capping layer, be finally completed welding.
- 10. the assembled welding process method of a kind of P92 heat resisting steel according to claim 9, it is characterised in that before the weldering Preparation uses far infrared tracklayer heater to be preheated preheating width when the temperature between layer, road maintains and is opened for counterpart center Begin, per 3 times of side weldment thickness, and not less than 100mm;The minimum widith of insulating layer increases 75mm or 3 times per side for heater The higher value of weldment thickness；Temperature-control heat couple is mounted under the heater in uniform temperature zone, allows to weld or bind using energy storage Mode thermocouple is installed, but should be noted that effective heat-insulated between measurement point and heater, avoid the occurrence of hot short circuit, it is per side plus Hot device is apart from bevelled edge at least more than 25mm, to facilitate welding.Surface-type thermoelectricity can be used in temperature between preheating temperature and layer, road The even, measurements such as infrared radiation thermometer, tempilstick, 200 DEG C ~ 250 DEG C of preheating temperature, temperature control is 150 DEG C ~ 200 between welding layer, road ℃。
- 11. the assembled welding process method of a kind of P92 heat resisting steel according to claim 10, it is characterised in that adopted during welding The Wce-20 tungsten electrodes that welding wire is φ 2.4mm, tungsten electrode 6~8mm of extension elongation, nozzle diameter 10mm.
- 12. the assembled welding process method of a kind of P92 heat resisting steel according to claim 11, it is characterised in that welding uses Base material P92 steel thickness be 20mm.
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| CN109530953A (en) * | 2019-01-14 | 2019-03-29 | 烟台蓝鲸增材有限公司 | A kind of zero deformation welding process of ultra-large type net-size forging combination |
| CN110449698A (en) * | 2019-07-23 | 2019-11-15 | 安徽伟宏钢结构集团股份有限公司 | A kind of 6-16mm welding method for steel plates |
| CN111136398A (en) * | 2020-01-02 | 2020-05-12 | 中国神华能源股份有限公司国华电力分公司 | Boiler pipeline butt welding process |
| CN111112795A (en) * | 2020-01-20 | 2020-05-08 | 中车四方车辆有限公司 | Welding method for vertical pipe butt joint annular welding seam |
| CN111805063A (en) * | 2020-07-02 | 2020-10-23 | 陕西榆林能源集团横山煤电有限公司 | Large thick wall P92 steel welding method |
| CN113084313A (en) * | 2021-03-03 | 2021-07-09 | 广州特种承压设备检测研究院 | Argon tungsten-arc welding process for steel for ultra-supercritical boiler |
| CN115026379A (en) * | 2022-07-03 | 2022-09-09 | 新疆八钢佳域工业材料有限公司 | Welding process of water tank type water-cooled furnace mouth of steel-making converter |
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Application publication date: 20180629 |