CN106319191A - Postweld stabilizing thermal treatment method for pipeline made of TP347 material - Google Patents
Postweld stabilizing thermal treatment method for pipeline made of TP347 material Download PDFInfo
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- CN106319191A CN106319191A CN201610920236.6A CN201610920236A CN106319191A CN 106319191 A CN106319191 A CN 106319191A CN 201610920236 A CN201610920236 A CN 201610920236A CN 106319191 A CN106319191 A CN 106319191A
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- material pipeline
- weld seam
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
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Abstract
The invention discloses a postweld stabilizing thermal treatment method for a pipeline made of a TP347 material, and the postweld stabilizing thermal treatment method is used for carrying out postweld pretreatment on the pipeline made of the TP347 material before stabilizing thermal treatment. The postweld stabilizing thermal treatment method comprises the following steps: continuously introducing protective gas comprising 92% (in volume fraction) of N2 and 8% of CO2 to the two ends of the pipeline made of the TP347 material opposite to a welding seam separately; heating the welding seam, stopping heating when the temperature is 400 DEG C, keeping the temperature at 400 DEG C for 2-3 hours, reducing the temperature to 100 DEG C, and treating the welding seam by use of ultrasonic impact equipment after circulating for 5-8 times; and finally, carrying out infrared radiation for 4-5 hours on the pipeline made of the TP347 material. According to the postweld stabilizing thermal treatment method disclosed by the invention, stabilizing thermal treatment is carried out after pretreatment; the pipeline made of the TP347 material comprises stabilizing elements, namely niobium, titanium, yttrium and zirconium; and the method disclosed by the invention is adopted, so that welding seam cracks are effectively eliminated, and therefore, welding seam quality is improved.
Description
Technical field
The present invention relates to a kind of postwelding Stabilizing Heat Treatment technique.Specifically, the present invention relates to a kind of TP347 material pipe
Road postwelding stabilizing heat treatment method.
Background technology
Oil refining industry all faces processing high-sulfur, heavy and the situation of crude oil with poor quality, and current domestic oil refining item both at home and abroad
Mesh and Technology have tended to saturated, oil refining, coking the side-product such as utilization ratio such as residual oil, coal tar the lowest, therefore,
Development hydrogen addition technology is one of important measures meeting this challenge, and this technology will change domestic oil refining present situation, can be by residual oil, coal
The various low value-added product recycling such as tar.Hydrogen addition technology will be last block virgin land in oil refining industry, and who first slaps
Hold this construction field so to maintain the leading position in market from now on.
The feature of hydrogenation plant is: high temperature (operation temperature be 361～440 DEG C), high pressure (operation pressure 14.5～
17.13MPa), be in again the critical operation operating mode that the multi-dielectric such as hydrogen, hydrogen sulfide exists simultaneously, according to material combination property,
Quality and engineering cost aspect consider, and the reactive moieties that operating mode is the harshest in device uses TP347 thick-wall tube undoubtedly
It it is best selection.TP347 material pipeline mainly occupies importantly in the application in the reaction zone of hydrogenation of tar project, stove district etc.
Position, it has good high temperature resistance to oxidation, wear-resisting, anti-corrosion and heat stability, for preventing crystal boundary chromium depleted, it is ensured that welding point has
Good corrosion resistance, reduces weld seam remnants welding stress level, job specfication and design document and requires that Welded Joints enters
Line stabilization heat-transformation processes.But in work progress, TP347 material pipe welding seam is after Stabilizing Heat Treatment, and splitting occurs in part weld seam
Stricture of vagina, and along with the increase of wall thickness, crack degree is the most serious.Advanced Stabilizing Heat Treatment technique, can be greatly enhanced construction effect
Rate, shortening construction period.Therefore, the postwelding Stabilizing Heat Treatment technique rationally selecting, perform, optimize this material becomes to be needed in the industry
The target of Gonna breakthrough.
Summary of the invention
It is an object of the invention to solve at least the above, and the advantage that at least will be described later is provided.
It is a still further object of the present invention to provide a kind of TP347 material pipeline postwelding stabilizing heat treatment method, it is compared
It is effectively reduced the size of bead crack in prior art, even eliminates bead crack, promote weldquality.
A kind of TP347 material pipeline postwelding stabilizing heat treatment method that the present invention provides, before Stabilizing Heat Treatment
TP347 material pipeline is carried out postwelding pretreatment, including: continue respectively at the two ends of the TP347 material pipeline relative with weld seam
Being passed through by volume fraction is 92%N2And 8%CO2The protective gas of composition, simultaneously butt welded seam heating, when temperature reaches 400 DEG C,
Stop heating, keep 2～3h, be cooled to 100 DEG C, use at ultrasonic impact equipment butt welded seam after circulating 5～8 times
Reason, finally carries out infra-red radiation 4～5h to TP347 material pipeline；
Wherein, the flow of protective gas is 20L/min, butt welded seam heating scope control distance the every side of weld seam 100～
200mm, is increased to 400 DEG C with the heating rate of 40 DEG C/h during heating, with the rate of temperature fall of 15 DEG C/h by 400 DEG C of reductions during cooling
To 100 DEG C, the frequency of ultrasonic impact equipment is 26～30kHz, and number of shocks is 3～6 times, the wavelength of infra-red radiation be 200～
600μm。
Preferably, ultrasonic impact includes: dips in wet fine rule with coloured aqueous coating and is perpendicular to weld seam together along face of weld
Time be parallel to weld seam equidistantly rule formation grid array form, spacing is at least 1st/20th of weld seam total length, vertically
Spacing quantity in weld seam is at least ten, and ultrasonic impact equipment has impact gun, and impact gun is directed at and is perpendicular to weld seam, edge
The array point of close weld seam is successively away from carrying out shock treatment.
Preferably, TP347 material pipeline contains stabilizing element niobium, titanium, yttrium, zirconium, wherein after niobium, titanium mixing with yttrium,
The mixed weight ratio of zirconium is 4～6:1, and its mixing is 9～10 with the weight ratio of carbon.
Preferably, Stabilizing Heat Treatment comprises the following steps:
1) TP347 material pipeline is placed smooth, use backing plate or clamping device to be fixed；
2) use electric boiling plate to step 1) in treated weld metal zone heat, the heated perimeter of every side, weld metal zone
At least 5 times of the thickness of the tube wall of TP347 material pipeline, are greater than 110mm simultaneously；
3) in step 2) described in weld seam both sides weld metal zone heated perimeter in spot welding temperature control/temperature thermocouple, and control
Temperature/temperature thermocouple is in the equidistant spot welding in weld seam both sides；
4) the TP347 material pipeline heat-preservation cotton of every for weld metal zone side is wound around parcel, and the heat-preserving range of every side is at least
7 times of the thickness of the tube wall of TP347 material pipeline, are greater than 300mm simultaneously；
5) open electric boiling plate TP347 material pipeline is heated, control heating-up temperature from the beginning of 0 DEG C, programming rate
Be 50 DEG C/h, when temperature control/temperature thermocouple tests step 2) in heated perimeter temperature when being increased to 890 DEG C, close electrical heating
Plate, constant temperature insulation 6h, then slow cooling cool to 700 DEG C, control cooling rate less than 90 DEG C/h, the most in atmosphere natural cooling.
Preferably, heat-preservation cotton is the most successively by aluminium silicate heat-preservation cotton, asbestos, soft polyurethane foam, nanometer titanium dioxide
Silica aerogel, aluminum foil heat preserving cotton superimposion form, and its thickness ratio is followed successively by 5:2:1:3:2, and gross thickness is more than 100mm；First
When being wound around parcel TP347 material pipeline, pipeline external surface is close in the side at aluminium silicate heat-preservation cotton place.
Preferably, the heat-preservation cotton of weld seam both sides is arranged on and is incubated close proximity to commissure, and every side is from Weld pipe mill distance
Control between 300～500mm.
Preferably, the temperature difference between weld seam both sides is less than 80 DEG C.
Preferably, during whole Stabilizing Heat Treatment, one end of TP347 material pipeline is blocked, continue from the other end
Being passed through nitrogen until being completely filled with in pipeline during nitrogen stopping, and blocked by the other end, intake is 25L/min.
Effect that the present invention can reach is promoted:
The TP347 material pipeline postwelding stabilizing heat treatment method of the present invention, right before postwelding Stabilizing Heat Treatment
TP347 material pipeline carries out pretreatment, wherein uses ultrasonic impact equipment butt welded seam surface to carry out shock treatment, uses infra-red radiation
Mode the pipeline through ultrasonic impact is supplemented waste heat, accelerate weld seam and surrounding inner molecule, the motion of atom, effectively release
Put portion of residual stress, promote weldquality.
The TP347 material pipeline postwelding stabilizing heat treatment method of the present invention, TP347 material pipeline contains stabilizing element
Niobium, titanium, yttrium, zirconium, through the stabilization temperature of more than 890 DEG C, can form stable carbide, be substantially reduced in austenite
Cr23C6Content, and in cooling procedure formed stable carbide the most fully separate out, make carbon can not form the carbonization of chromium again
Thing, thus effectively eliminate intercrystalline corrosion tendency.
The TP347 material pipeline postwelding stabilizing heat treatment method of the present invention, wherein by aluminium silicate heat-preservation cotton, asbestos, poly-
The soft bubble of urethane, nanometer titanium dioxide silica aerogel, the heat-preservation cotton of aluminum foil heat preserving cotton superimposion, its temperature retention time is longer, insulation effect
Fruit is more preferably.
The TP347 material pipeline postwelding stabilizing heat treatment method of the present invention, will during whole Stabilizing Heat Treatment
One end closure of TP347 material pipeline, is continually fed into nitrogen from the other end until being completely filled with in pipeline during nitrogen stopping, and separately
One end blocks, and manufactures oxygen-free environment, prevents its original performance of the oxidized destruction of pipeline under hot conditions.
The TP347 material pipeline postwelding stabilizing heat treatment method of the present invention, drastically increases efficiency of construction, shortens
Construction period.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part also will be by this
Invention research and practice and be understood by the person skilled in the art.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, to make those skilled in the art with reference to description
Word can be implemented according to this.
Should be appreciated that used herein such as " have ", " comprising " and " including " term do not allot one or many
Other element individual or the existence of a combination thereof or interpolation.
<embodiment 1>
A kind of TP347 material pipeline postwelding stabilizing heat treatment method:
Before Stabilizing Heat Treatment, TP347 material pipeline is carried out postwelding pretreatment, including: relative with weld seam
It is 92%N that the two ends of TP347 material pipeline are continually fed into respectively by volume fraction2And 8%CO2The protective gas of composition, the most right
Weld seam heats, and when temperature reaches 400 DEG C, stops heating, keeps 2h, be cooled to 100 DEG C, uses ultrasonic after circulating 5 times
Impact device butt welded seam processes, and finally TP347 material pipeline is carried out infra-red radiation 4h；
Wherein, the flow of protective gas is 20L/min, butt welded seam heating scope control distance weld seam every side 100mm,
Being increased to 400 DEG C with the heating rate of 40 DEG C/h during heating, during cooling, the rate of temperature fall with 15 DEG C/h is reduced to 100 by 400 DEG C
DEG C, the frequency of ultrasonic impact equipment is 26kHz, and number of shocks is 3 times, and the wavelength of infra-red radiation is 200 μm.
Ultrasonic impact includes: with coloured aqueous coating dip in wet fine rule along face of weld be perpendicular to weld seam simultaneously be parallel to weldering
Seam equidistantly line forms grid array form, and spacing is 1st/20th of weld seam total length, is perpendicular to the spacing number of weld seam
Amount is ten, and ultrasonic impact equipment has impact gun, and impact gun is directed at and is perpendicular to weld seam, depends on along the array point near weld seam
Secondary away from carrying out shock treatment.
Stabilizing Heat Treatment comprises the following steps:
1) TP347 material pipeline is placed smooth, use backing plate or clamping device to be fixed；
2) use electric boiling plate to step 1) in treated weld metal zone heat, the heated perimeter of every side, weld metal zone
At least 5 times of the thickness of the tube wall of TP347 material pipeline, simultaneously greater than 110mm；
3) in step 2) described in weld seam both sides weld metal zone heated perimeter in spot welding temperature control/temperature thermocouple, and control
Temperature/temperature thermocouple is in the equidistant spot welding in weld seam both sides；
4) the TP347 material pipeline heat-preservation cotton of every for weld metal zone side is wound around parcel, and the heat-preserving range of every side is TP347
At least 7 times of the thickness of the tube wall of material pipeline, simultaneously greater than 300mm；
5) open electric boiling plate TP347 material pipeline is heated, control heating-up temperature from the beginning of 0 DEG C, programming rate
Be 50 DEG C/h, when temperature control/temperature thermocouple tests step 2) in the temperature of heated perimeter when being increased to 890 DEG C, close electricity and add
Hot plate, constant temperature insulation 6h, then slow cooling cool to 700 DEG C, control cooling rate less than 90 DEG C/h, the coldest
But.
The heat-preservation cotton of weld seam both sides is arranged on and is incubated close proximity to commissure, and every side controls from Weld pipe mill distance
Between 300mm.
The temperature difference between weld seam both sides is less than 80 DEG C.
During whole Stabilizing Heat Treatment, one end of TP347 material pipeline is blocked, be continually fed into nitrogen from the other end
Until being completely filled with in pipeline during nitrogen stopping, and being blocked by the other end, intake is 25L/min.
<embodiment 2>
A kind of TP347 material pipeline postwelding stabilizing heat treatment method:
Before Stabilizing Heat Treatment, TP347 material pipeline is carried out postwelding pretreatment, including: relative with weld seam
It is 92%N that the two ends of TP347 material pipeline are continually fed into respectively by volume fraction2And 8%CO2The protective gas of composition, the most right
Weld seam heats, and when temperature reaches 400 DEG C, stops heating, keeps 2.5h, be cooled to 100 DEG C, uses super after circulating 6 times
Acoustic shock equipment butt welded seam processes, and finally TP347 material pipeline is carried out infra-red radiation 4.5h；
Wherein, the flow of protective gas is 20L/min, butt welded seam heating scope control distance weld seam every side 150mm,
Being increased to 400 DEG C with the heating rate of 40 DEG C/h during heating, during cooling, the rate of temperature fall with 15 DEG C/h is reduced to 100 by 400 DEG C
DEG C, the frequency of ultrasonic impact equipment is 28kHz, and number of shocks is 5 times, and the wavelength of infra-red radiation is 400 μm.
Ultrasonic impact includes: with coloured aqueous coating dip in wet fine rule along face of weld be perpendicular to weld seam simultaneously be parallel to weldering
Seam equidistantly line forms grid array form, and spacing is at least 1st/20th of weld seam total length, is perpendicular between weld seam
Being at least ten away from quantity, ultrasonic impact equipment has impact gun, and impact gun is directed at and is perpendicular to weld seam, along near weld seam
Array point is successively away from carrying out shock treatment.
TP347 material pipeline contains stabilizing element niobium, titanium, yttrium, zirconium, wherein mixed with yttrium, zirconium after niobium, titanium mixing
Weight ratio is 4:1, and its mixing is 9 with the weight ratio of carbon.
Stabilizing Heat Treatment comprises the following steps:
1) TP347 material pipeline is placed smooth, use backing plate or clamping device to be fixed；
2) use electric boiling plate to step 1) in treated weld metal zone heat, the heated perimeter of every side, weld metal zone
At least 5 times of the thickness of the tube wall of TP347 material pipeline, simultaneously greater than 110mm；
3) in step 2) described in weld seam both sides weld metal zone heated perimeter in spot welding temperature control/temperature thermocouple, and control
Temperature/temperature thermocouple is in the equidistant spot welding in weld seam both sides；
4) the TP347 material pipeline heat-preservation cotton of every for weld metal zone side is wound around parcel, and the heat-preserving range of every side is TP347
At least 7 times of the thickness of the tube wall of material pipeline, simultaneously greater than 300mm；
5) open electric boiling plate TP347 material pipeline is heated, control heating-up temperature from the beginning of 0 DEG C, programming rate
Be 50 DEG C/h, when temperature control/temperature thermocouple tests step 2) in heated perimeter temperature when being increased to 890 DEG C, close electrical heating
Plate, constant temperature insulation 6h, then slow cooling cool to 700 DEG C, control cooling rate less than 90 DEG C/h, the most in atmosphere natural cooling.
The heat-preservation cotton of weld seam both sides is arranged on and is incubated close proximity to commissure, and every side controls from Weld pipe mill distance
Between 400mm.
The temperature difference between weld seam both sides is less than 80 DEG C.
During whole Stabilizing Heat Treatment, one end of TP347 material pipeline is blocked, be continually fed into nitrogen from the other end
Until being completely filled with in pipeline during nitrogen stopping, and being blocked by the other end, intake is 25L/min.
<embodiment 3>
A kind of TP347 material pipeline postwelding stabilizing heat treatment method:
Before Stabilizing Heat Treatment, TP347 material pipeline is carried out postwelding pretreatment, including: relative with weld seam
It is 92%N that the two ends of TP347 material pipeline are continually fed into respectively by volume fraction2And 8%CO2The protective gas of composition, the most right
Weld seam heats, and when temperature reaches 400 DEG C, stops heating, keeps 3h, be cooled to 100 DEG C, uses ultrasonic after circulating 8 times
Impact device butt welded seam processes, and finally TP347 material pipeline is carried out infra-red radiation 5h；
Wherein, the flow of protective gas is 20L/min, butt welded seam heating scope control distance weld seam every side 200mm,
Being increased to 400 DEG C with the heating rate of 40 DEG C/h during heating, during cooling, the rate of temperature fall with 15 DEG C/h is reduced to 100 by 400 DEG C
DEG C, the frequency of ultrasonic impact equipment is 30kHz, and number of shocks is 6 times, and the wavelength of infra-red radiation is 600 μm.
Ultrasonic impact includes: with coloured aqueous coating dip in wet fine rule along face of weld be perpendicular to weld seam simultaneously be parallel to weldering
Seam equidistantly line forms grid array form, and spacing is at least 1st/20th of weld seam total length, is perpendicular between weld seam
Being at least ten away from quantity, ultrasonic impact equipment has impact gun, and impact gun is directed at and is perpendicular to weld seam, along near weld seam
Array point is successively away from carrying out shock treatment.
TP347 material pipeline contains stabilizing element niobium, titanium, yttrium, zirconium, wherein mixed with yttrium, zirconium after niobium, titanium mixing
Weight ratio is 6:1, and its mixing is 10 with the weight ratio of carbon.
Stabilizing Heat Treatment comprises the following steps:
1) TP347 material pipeline is placed smooth, use backing plate or clamping device to be fixed；
2) use electric boiling plate to step 1) in treated weld metal zone heat, the heated perimeter of every side, weld metal zone
At least 5 times of the thickness of the tube wall of TP347 material pipeline, simultaneously greater than 110mm；
3) in step 2) described in weld seam both sides weld metal zone heated perimeter in spot welding temperature control/temperature thermocouple, and control
Temperature/temperature thermocouple is in the equidistant spot welding in weld seam both sides；
4) the TP347 material pipeline heat-preservation cotton of every for weld metal zone side is wound around parcel, and the heat-preserving range of every side is at least
7 times of the thickness of the tube wall of TP347 material pipeline, simultaneously greater than 300mm；
5) open electric boiling plate TP347 material pipeline is heated, control heating-up temperature from the beginning of 0 DEG C, programming rate
Be 50 DEG C/h, when temperature control/temperature thermocouple tests step 2) in heated perimeter temperature when being increased to 890 DEG C, close electrical heating
Plate, constant temperature insulation 6h, then slow cooling cool to 700 DEG C, control cooling rate less than 90 DEG C/h, the most in atmosphere natural cooling.
Heat-preservation cotton the most successively by aluminium silicate heat-preservation cotton, asbestos, soft polyurethane foam, nanometer titanium dioxide silica aerogel,
Aluminum foil heat preserving cotton superimposion forms, and its thickness ratio is followed successively by 5:2:1:3:2, and gross thickness is more than 100mm；It is wound around parcel first
During TP347 material pipeline, pipeline external surface is close in the side at aluminium silicate heat-preservation cotton place.
The heat-preservation cotton of weld seam both sides is arranged on and is incubated close proximity to commissure, and every side controls from Weld pipe mill distance
Between 500mm.
The temperature difference between weld seam both sides is less than 80 DEG C.
During whole Stabilizing Heat Treatment, one end of TP347 material pipeline is blocked, be continually fed into nitrogen from the other end
Until being completely filled with in pipeline during nitrogen stopping, and being blocked by the other end, intake is 25L/min.
<contrast test>
Comparative example is not through the TP347 material pipeline of postwelding pretreatment.Embodiment 1,2,3 and comparative example are carried out surely
Determine heat-transformation to process, use liquid penetration examination method, i.e. PT detects, to the TP347 material after every kind of Stabilizing Heat Treatment above
Pipeline carry out defects detection, detection position is weld seam, and time of penetration is 10min, and drying time is 5min, and time of developing is
10min, observes the size of the vestige after penetrating agent imaging, as shown in table 1.
Table 1
By embodiment 1 and comparative example, the present invention largely reduces bead crack through postwelding pretreatment
Size, promote weldquality；Meanwhile, the present invention through postwelding pretreatment again to the TP347 material pipe containing stabilizing element
Road carries out Stabilizing Heat Treatment, and the complex heat-preservation simultaneously using better heat preservation is cotton, effectively eliminates bead crack, promotes weldering
Seam quality.
Although embodiment of the present invention are disclosed as above, but it is not restricted in description and embodiment listed
Using, it can be applied to various applicable the field of the invention completely, for those skilled in the art, and can be easily
Realizing other amendment, therefore under the general concept limited without departing substantially from claim and equivalency range, the present invention does not limit
In specific details.
Claims (8)
1. a TP347 material pipeline postwelding stabilizing heat treatment method, it is characterised in that right before Stabilizing Heat Treatment
TP347 material pipeline carries out postwelding pretreatment, including: the most persistently lead at the two ends of the TP347 material pipeline relative with weld seam
Entering by volume fraction is 92%N2And 8%CO2The protective gas of composition, butt welded seam heating, when temperature reaches 400 DEG C, stops simultaneously
Only heating, keeps 2～3h, is cooled to 100 DEG C, uses ultrasonic impact equipment butt welded seam to process after circulating 5～8 times,
Finally TP347 material pipeline is carried out infra-red radiation 4～5h；
Wherein, the flow of protective gas is 20L/min, butt welded seam heating scope control distance the every side of weld seam 100～
200mm, is increased to 400 DEG C with the heating rate of 40 DEG C/h during heating, with the rate of temperature fall of 15 DEG C/h by 400 DEG C of reductions during cooling
To 100 DEG C, the frequency of ultrasonic impact equipment is 26～30kHz, and number of shocks is 3～6 times, the wavelength of infra-red radiation be 200～
600μm。
2. TP347 material pipeline postwelding stabilizing heat treatment method as claimed in claim 1, it is characterised in that ultrasonic impact
Including: it is perpendicular to weld seam along face of weld and is parallel to weld seam with dipping in wet fine rule through coloured aqueous coating simultaneously and equidistantly rules shape
Becoming grid array form, spacing is at least 1st/20th of weld seam total length, and the spacing quantity being perpendicular to weld seam is at least ten
Individual, ultrasonic impact equipment has impact gun, and impact gun is directed at and is perpendicular to weld seam, along the array point near weld seam successively away from
Carry out shock treatment.
3. TP347 material pipeline postwelding stabilizing heat treatment method as claimed in claim 2, it is characterised in that TP347 material
Pipeline contains stabilizing element niobium, titanium, yttrium, zirconium, is wherein 4～6:1 with yttrium, the mixed weight ratio of zirconium after niobium, titanium mixing, its
Four mixing are 9～10 with the weight ratio of carbon.
4. TP347 material pipeline postwelding stabilizing heat treatment method as claimed in claim 3, it is characterised in that stablize heat-transformation
Process comprises the following steps:
1) TP347 material pipeline is placed smooth, use backing plate or clamping device to be fixed；
2) use electric boiling plate to step 1) in treated weld metal zone heat, the heated perimeter of every side, weld metal zone is at least
It is 5 times of thickness of the tube wall of TP347 material pipeline, is greater than 110mm simultaneously；
3) in step 2) described in weld seam both sides weld metal zone heated perimeter in spot welding temperature control/temperature thermocouple, and temperature control/survey
Warm galvanic couple is in the equidistant spot welding in weld seam both sides；
4) the TP347 material pipeline heat-preservation cotton of every for weld metal zone side is wound around parcel, and the heat-preserving range of every side is at least TP347
7 times of the thickness of the tube wall of material pipeline, are greater than 300mm simultaneously；
5) opening electric boiling plate to heat TP347 material pipeline, control heating-up temperature is from the beginning of 0 DEG C, and programming rate is 50
DEG C/h, when temperature control/temperature thermocouple tests step 2) in heated perimeter temperature when being increased to 890 DEG C, close electric boiling plate, permanent
Temperature is incubated 6h, then slow cooling cools to 700 DEG C, controls cooling rate less than 90 DEG C/h, the most in atmosphere natural cooling.
5. TP347 material pipeline postwelding stabilizing heat treatment method as claimed in claim 4, it is characterised in that heat-preservation cotton by
Under supreme multiple by aluminium silicate heat-preservation cotton, asbestos, soft polyurethane foam, nanometer titanium dioxide silica aerogel, aluminum foil heat preserving cotton superposition successively
Conjunction forms, and its thickness ratio is followed successively by 5:2:1:3:2, and gross thickness is more than 100mm；When being wound around parcel TP347 material pipeline first, silicon
Pipeline external surface is close in the side at acid aluminum heat-preservation cotton place.
6. TP347 material pipeline postwelding stabilizing heat treatment method as claimed in claim 5, it is characterised in that weld seam both sides
Heat-preservation cotton be arranged on close proximity to commissure be incubated, every side controls between 300～500mm from Weld pipe mill distance.
7. TP347 material pipeline postwelding stabilizing heat treatment method as claimed in claim 6, it is characterised in that weld seam both sides
Between the temperature difference less than 80 DEG C.
8. the TP347 material pipeline postwelding stabilizing heat treatment method as described in any one of claim 4～7, it is characterised in that
During whole Stabilizing Heat Treatment, one end of TP347 material pipeline is blocked, be continually fed into nitrogen until pipeline from the other end
Inside being completely filled with during nitrogen stopping, and blocked by the other end, intake is 25L/min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557547A (en) * | 2017-08-22 | 2018-01-09 | 南京宝色股份公司 | A kind of post weld heat treatment technique of austenitic stainless steel containing niobium and fluid bed |
| CN108927587A (en) * | 2018-07-23 | 2018-12-04 | 中国化学工程第十四建设有限公司 | Pipeline processing technique in paraffin base lubricating oil hydrogenation plant |
| CN110656231A (en) * | 2019-10-21 | 2020-01-07 | 重庆齿轮箱有限责任公司 | Protection device for welding seam of welded gear |
| CN112176175A (en) * | 2020-09-30 | 2021-01-05 | 中国石油化工股份有限公司 | TP347 thick-wall pipeline stabilizing heat treatment method |
| CN115198060A (en) * | 2022-07-14 | 2022-10-18 | 大庆市龙兴石油机械有限公司 | Inner wall laser heat treatment oil pipe |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557547A (en) * | 2017-08-22 | 2018-01-09 | 南京宝色股份公司 | A kind of post weld heat treatment technique of austenitic stainless steel containing niobium and fluid bed |
| CN107557547B (en) * | 2017-08-22 | 2023-03-10 | 南京宝色股份公司 | Postweld heat treatment process and fluidized bed for niobium-containing austenitic stainless steel |
| CN108927587A (en) * | 2018-07-23 | 2018-12-04 | 中国化学工程第十四建设有限公司 | Pipeline processing technique in paraffin base lubricating oil hydrogenation plant |
| CN110656231A (en) * | 2019-10-21 | 2020-01-07 | 重庆齿轮箱有限责任公司 | Protection device for welding seam of welded gear |
| CN112176175A (en) * | 2020-09-30 | 2021-01-05 | 中国石油化工股份有限公司 | TP347 thick-wall pipeline stabilizing heat treatment method |
| CN115198060A (en) * | 2022-07-14 | 2022-10-18 | 大庆市龙兴石油机械有限公司 | Inner wall laser heat treatment oil pipe |
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| CN106319191B (en) | 2017-11-07 |
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