CN106319191B - TP347 material pipeline postwelding stabilizing heat treatment methods - Google Patents
TP347 material pipeline postwelding stabilizing heat treatment methods Download PDFInfo
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- CN106319191B CN106319191B CN201610920236.6A CN201610920236A CN106319191B CN 106319191 B CN106319191 B CN 106319191B CN 201610920236 A CN201610920236 A CN 201610920236A CN 106319191 B CN106319191 B CN 106319191B
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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 kind of TP347 materials pipeline postwelding stabilizing heat treatment method, postwelding pretreatment is carried out to TP347 materials pipeline before Stabilizing Heat Treatment, including：It is 92%N to be continually fed into respectively at the two ends of the TP347 material pipeline relative with weld seam by volume fraction2And 8%CO2The protective gas of composition, while being heated to weld seam, when temperature reaches 400 DEG C; stop heating, keep 2~3h, be cooled to 100 DEG C; weld seam is handled using ultrasonic impact equipment after circulating 5~8 times, 4~5h of infra-red radiation finally is carried out to TP347 materials pipeline.Stabilizing Heat Treatment is carried out after pretreatment, simultaneously because the TP347 material pipelines of the present invention contain stabilizing element niobium, titanium, yttrium, zirconium, bead crack is effectively eliminated using the method for the present invention, weldquality 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 materials pipe
Road postwelding stabilizing heat treatment method.
Background technology
Domestic and international oil refining industry faces the situation of processing high-sulfur, heavy and crude oil with poor quality, and domestic oil refining item at present
Mesh and technology have tended to saturation, oil refining, coking the byproduct such as utilization ratio such as residual oil, coal tar it is too low, therefore,
It is to meet one of important measures of this challenge to develop hydrogen addition technology, and the technology will change domestic oil refining present situation, can be by residual oil, coal
The various low value-added products such as tar are recycled.Hydrogen addition technology will be last block virgin land in oil refining industry, and who is first slapped
Having held the construction field will so maintain the leading position in market from now on.
The characteristics of hydrogenation plant is：High temperature (operation temperature be 361~440 DEG C), high pressure (operating pressure 14.5~
17.13MPa), while being in the critical operation operating mode that the multi-dielectrics such as hydrogen, hydrogen sulfide are present again, foundation material combination property,
Consider in terms of quality and engineering cost, in device operating mode most harsh reactive moieties using TP347 thick-wall tubes undoubtedly
It is best selection.The main application in reaction zone, the stove area of hydrogenation of tar project etc. of TP347 materials pipeline is occupied importantly
Position, it has good high temperature resistance to oxidation, wear-resisting, anti-corrosion and heat endurance, to prevent crystal boundary chromium depleted, it is ensured that welding point has
Good corrosion resistance, the remaining welding stress level of reduction weld seam, job specfication and design document require that Welded Joints enter
Row Stabilizing Heat Treatment.But TP347 materials pipe welding seam is after Stabilizing Heat Treatment in work progress, and part weld seam splits
Line, and with the increase of wall thickness, crack degree is more serious.Advanced Stabilizing Heat Treatment technique, can be greatly enhanced construction effect
Rate, shortening construction period.Therefore, reasonable selection, the postwelding Stabilizing Heat Treatment technique that performs, optimize the material turn into and needed in the industry
The target of Gonna breakthrough.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide a kind of TP347 materials pipeline postwelding stabilizing heat treatment method, it is compared
The size of bead crack is effectively reduced in prior art, or even eliminates bead crack, weldquality is lifted.
A kind of TP347 materials pipeline postwelding stabilizing heat treatment method that the present invention is provided, before Stabilizing Heat Treatment
Postwelding pretreatment is carried out to TP347 materials pipeline, including：Continue respectively at the two ends of the TP347 material pipeline relative with weld seam
It is 92%N to be passed through by volume fraction2And 8%CO2The protective gas of composition, while weld seam is heated, when temperature reaches 400 DEG C,
Stop heating, keep 2~3h, be cooled to 100 DEG C, after circulation 5~8 times using ultrasonic impact equipment to weld seam at
Reason, finally carries out 4~5h of infra-red radiation to TP347 materials pipeline；
Wherein, the flow of protective gas be 20L/min, to weld seam heat scope control apart from weld seam per side 100~
200mm, 400 DEG C are increased to during heating with 40 DEG C/h heating rate, with 15 DEG C/h rate of temperature fall 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 is 200~
600μm。
Preferably, ultrasonic impact includes：Wet fine rule is dipped in coloured aqueous coating same perpendicular to weld seam along face of weld
When equidistantly rule to form grid array form parallel to weld seam, spacing is at least 1st/20th of weld seam total length, vertically
It is at least ten in the spacing quantity of weld seam, ultrasonic impact equipment has impact gun, impact gun is aligned and perpendicular to weld seam, edge
Array point close to weld seam is successively away from progress shock treatment.
Preferably, TP347 materials 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, it is mixed and the weight ratio of carbon is 9~10.
Preferably, Stabilizing Heat Treatment comprises the following steps：
1) TP347 materials pipeline is placed smooth, be fixed using backing plate or clamping device；
2) using electric boiling plate to step 1) in treated weld metal zone heat, weld metal zone often side heated perimeter
At least 5 times of the thickness of the tube wall of TP347 materials pipeline, while being 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 materials pipeline by weld metal zone per side is wound with heat-preservation cotton is wrapped up, and the heat-preserving range per side is at least
7 times of the thickness of the tube wall of TP347 material pipelines, while being greater than 300mm；
5) open electric boiling plate to heat TP347 material pipelines, control heating-up temperature is since 0 DEG C, programming rate
For 50 DEG C/h, when step 2 is arrived in temperature control/temperature thermocouple test) in heated perimeter temperature when being increased to 890 DEG C, closing electrical heating
Plate, constant temperature insulation 6h, then slow cooling cool to 700 DEG C, and control cooling rate is less than 90 DEG C/h, finally natural cooling in atmosphere.
Preferably, heat-preservation cotton is from the bottom to top successively by alumina silicate heat-preservation cotton, asbestos, soft polyurethane foam, nanometer titanium dioxide
Silica aerogel, aluminum foil heat preserving cotton superimposion are formed, and its thickness ratio is followed successively by 5:2:1:3:2, gross thickness is more than 100mm；First
During winding parcel TP347 material pipelines, pipeline external surface is close in the side where alumina silicate heat-preservation cotton.
Preferably, the heat-preservation cotton of weld seam both sides be arranged on close proximity to commissure insulation, per side from Weld pipe mill with a distance from
Control is between 300~500mm.
Preferably, the temperature difference between weld seam both sides is less than 80 DEG C.
Preferably, one end of TP347 material pipelines is blocked during whole Stabilizing Heat Treatment, continued from the other end
It is passed through nitrogen when being completely filled with nitrogen in pipeline to stop, and the other end is blocked, intake is 25L/min.
Effect that the present invention can reach is promoted：
The TP347 material pipeline postwelding stabilizing heat treatment methods of the present invention, it is right before postwelding Stabilizing Heat Treatment
TP347 material pipelines are pre-processed, wherein carrying out shock treatment to face of weld using ultrasonic impact equipment, use infra-red radiation
Mode to supplementing waste heat by the pipeline of ultrasonic impact, accelerate weld seam and its surrounding inner molecule, the motion of atom, effectively release
Portion of residual stress is put, weldquality is lifted.
The TP347 material pipeline postwelding stabilizing heat treatment methods of the present invention, TP347 material pipelines contain stabilizing element
Niobium, titanium, yttrium, zirconium, in the stabilization temperature by more than 890 DEG C, can form stable carbide, substantially reduce in austenite
Cr23C6Content, and the stable carbide formed in cooling procedure again fully separate out, carbon is re-formed the carbonization of chromium
Thing, thus effectively eliminate intercrystalline corrosion tendency.
The TP347 material pipeline postwelding stabilizing heat treatment methods of the present invention, wherein by alumina silicate heat-preservation cotton, asbestos, gathering
The soft bubble of urethane, nanometer titanium dioxide silica aerogel, the heat-preservation cotton of aluminum foil heat preserving cotton superimposion, its soaking time are longer, insulation effect
Fruit is more preferably.
The TP347 material pipeline postwelding stabilizing heat treatment methods of the present invention, will during whole Stabilizing Heat Treatment
One end closure of TP347 material pipelines, is continually fed into nitrogen from the other end and stops when nitrogen is completely filled with pipeline, and separately
One end is blocked, and manufactures oxygen-free environment, prevents oxidized its original performance of destruction of pipeline under hot conditions.
The TP347 material pipeline postwelding stabilizing heat treatment methods of the present invention, drastically increase efficiency of construction, shorten
Construction period.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Embodiment
With reference to embodiment, the present invention is described in further detail, to make those skilled in the art with reference to specification
Word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or many
The presence or addition of individual other elements or its combination.
<Embodiment 1>
A kind of TP347 materials pipeline postwelding stabilizing heat treatment method：
Postwelding pretreatment is carried out to TP347 materials pipeline before Stabilizing Heat Treatment, including：Relative with weld seam
It is 92%N that the two ends of TP347 material pipelines are continually fed into by volume fraction respectively2And 8%CO2The protective gas of composition, while right
Weld seam is heated, when temperature reaches 400 DEG C, stops heating, keeps 2h, is cooled to 100 DEG C, and ultrasound is used after circulating 5 times
Impact device is handled weld seam, finally carries out infra-red radiation 4h to TP347 materials pipeline；
Wherein, the flow of protective gas is 20L/min, the scope control heated to weld seam apart from weld seam per side 100mm,
400 DEG C are increased to 40 DEG C/h heating rate during heating, 100 are reduced to by 400 DEG C with 15 DEG C/h rate of temperature fall during cooling
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：Dipped in coloured aqueous coating wet fine rule along face of weld perpendicular to weld seam simultaneously parallel to weldering
Equidistantly line forms grid array form to seam, and spacing is 1st/20th of weld seam total length, perpendicular to the spacing number of weld seam
Measure as ten, ultrasonic impact equipment has impact gun, impact gun be aligned and perpendicular to weld seam, along the array point close to weld seam according to
Secondary remote progress shock treatment.
Stabilizing Heat Treatment comprises the following steps：
1) TP347 materials pipeline is placed smooth, be fixed using backing plate or clamping device；
2) using electric boiling plate to step 1) in treated weld metal zone heat, weld metal zone often side heated perimeter
At least 5 times of the thickness of the tube wall of TP347 materials 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 materials pipeline by weld metal zone per side is wound with heat-preservation cotton wraps up, and the heat-preserving range per 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 to heat TP347 material pipelines, control heating-up temperature is since 0 DEG C, programming rate
For 50 DEG C/h, when step 2 is arrived in temperature control/temperature thermocouple test) 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, and control cooling rate is less than 90 DEG C/h, finally naturally cold in atmosphere
But.
The heat-preservation cotton of weld seam both sides is arranged on close proximity to commissure insulation, is existed per side from control with a distance from Weld pipe mill
Between 300mm.
The temperature difference between weld seam both sides is less than 80 DEG C.
One end of TP347 material pipelines is blocked during whole Stabilizing Heat Treatment, nitrogen is continually fed into from the other end
Stop when nitrogen is completely filled with pipeline, and the other end is blocked, intake is 25L/min.
<Embodiment 2>
A kind of TP347 materials pipeline postwelding stabilizing heat treatment method：
Postwelding pretreatment is carried out to TP347 materials pipeline before Stabilizing Heat Treatment, including：Relative with weld seam
It is 92%N that the two ends of TP347 material pipelines are continually fed into by volume fraction respectively2And 8%CO2The protective gas of composition, while right
Weld seam is heated, when temperature reaches 400 DEG C, stops heating, keeps 2.5h, is cooled to 100 DEG C, using super after circulating 6 times
Acoustic shock equipment is handled weld seam, finally carries out infra-red radiation 4.5h to TP347 materials pipeline；
Wherein, the flow of protective gas is 20L/min, the scope control heated to weld seam apart from weld seam per side 150mm,
400 DEG C are increased to 40 DEG C/h heating rate during heating, 100 are reduced to by 400 DEG C with 15 DEG C/h rate of temperature fall during cooling
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：Dipped in coloured aqueous coating wet fine rule along face of weld perpendicular to weld seam simultaneously parallel to weldering
Equidistantly line forms grid array form to seam, and spacing is at least 1st/20th of weld seam total length, between weld seam
It is at least ten away from quantity, ultrasonic impact equipment has impact gun, impact gun is aligned and perpendicular to weld seam, along close to weld seam
Array point is successively away from progress shock treatment.
TP347 material pipelines contain stabilizing element niobium, titanium, yttrium, zirconium, wherein mixed with yttrium, zirconium after niobium, titanium mixing
Weight ratio is 4:1, it is mixed and the weight ratio of carbon is 9.
Stabilizing Heat Treatment comprises the following steps：
1) TP347 materials pipeline is placed smooth, be fixed using backing plate or clamping device；
2) using electric boiling plate to step 1) in treated weld metal zone heat, weld metal zone often side heated perimeter
At least 5 times of the thickness of the tube wall of TP347 materials 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 materials pipeline by weld metal zone per side is wound with heat-preservation cotton wraps up, and the heat-preserving range per 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 to heat TP347 material pipelines, control heating-up temperature is since 0 DEG C, programming rate
For 50 DEG C/h, when step 2 is arrived in temperature control/temperature thermocouple test) in heated perimeter temperature when being increased to 890 DEG C, closing electrical heating
Plate, constant temperature insulation 6h, then slow cooling cool to 700 DEG C, and control cooling rate is less than 90 DEG C/h, finally natural cooling in atmosphere.
The heat-preservation cotton of weld seam both sides is arranged on close proximity to commissure insulation, is existed per side from control with a distance from Weld pipe mill
Between 400mm.
The temperature difference between weld seam both sides is less than 80 DEG C.
One end of TP347 material pipelines is blocked during whole Stabilizing Heat Treatment, nitrogen is continually fed into from the other end
Stop when nitrogen is completely filled with pipeline, and the other end is blocked, intake is 25L/min.
<Embodiment 3>
A kind of TP347 materials pipeline postwelding stabilizing heat treatment method：
Postwelding pretreatment is carried out to TP347 materials pipeline before Stabilizing Heat Treatment, including：Relative with weld seam
It is 92%N that the two ends of TP347 material pipelines are continually fed into by volume fraction respectively2And 8%CO2The protective gas of composition, while right
Weld seam is heated, when temperature reaches 400 DEG C, stops heating, keeps 3h, is cooled to 100 DEG C, and ultrasound is used after circulating 8 times
Impact device is handled weld seam, finally carries out infra-red radiation 5h to TP347 materials pipeline；
Wherein, the flow of protective gas is 20L/min, the scope control heated to weld seam apart from weld seam per side 200mm,
400 DEG C are increased to 40 DEG C/h heating rate during heating, 100 are reduced to by 400 DEG C with 15 DEG C/h rate of temperature fall during cooling
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：Dipped in coloured aqueous coating wet fine rule along face of weld perpendicular to weld seam simultaneously parallel to weldering
Equidistantly line forms grid array form to seam, and spacing is at least 1st/20th of weld seam total length, between weld seam
It is at least ten away from quantity, ultrasonic impact equipment has impact gun, impact gun is aligned and perpendicular to weld seam, along close to weld seam
Array point is successively away from progress shock treatment.
TP347 material pipelines contain stabilizing element niobium, titanium, yttrium, zirconium, wherein mixed with yttrium, zirconium after niobium, titanium mixing
Weight ratio is 6:1, it is mixed and the weight ratio of carbon is 10.
Stabilizing Heat Treatment comprises the following steps：
1) TP347 materials pipeline is placed smooth, be fixed using backing plate or clamping device；
2) using electric boiling plate to step 1) in treated weld metal zone heat, weld metal zone often side heated perimeter
At least 5 times of the thickness of the tube wall of TP347 materials 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 materials pipeline by weld metal zone per side is wound with heat-preservation cotton is wrapped up, and the heat-preserving range per side is at least
7 times of the thickness of the tube wall of TP347 material pipelines, simultaneously greater than 300mm；
5) open electric boiling plate to heat TP347 material pipelines, control heating-up temperature is since 0 DEG C, programming rate
For 50 DEG C/h, when step 2 is arrived in temperature control/temperature thermocouple test) in heated perimeter temperature when being increased to 890 DEG C, closing electrical heating
Plate, constant temperature insulation 6h, then slow cooling cool to 700 DEG C, and control cooling rate is less than 90 DEG C/h, finally natural cooling in atmosphere.
Heat-preservation cotton from the bottom to top successively by alumina silicate heat-preservation cotton, asbestos, soft polyurethane foam, nanometer titanium dioxide silica aerogel,
Aluminum foil heat preserving cotton superimposion is formed, and its thickness ratio is followed successively by 5:2:1:3:2, gross thickness is more than 100mm；Winding is wrapped up first
During TP347 material pipelines, pipeline external surface is close in the side where alumina silicate heat-preservation cotton.
The heat-preservation cotton of weld seam both sides is arranged on close proximity to commissure insulation, is existed per side from control with a distance from Weld pipe mill
Between 500mm.
The temperature difference between weld seam both sides is less than 80 DEG C.
One end of TP347 material pipelines is blocked during whole Stabilizing Heat Treatment, nitrogen is continually fed into from the other end
Stop when nitrogen is completely filled with pipeline, and the other end is blocked, intake is 25L/min.
<Contrast test>
Comparative example is without the TP347 material pipelines pre-processed by postwelding.Embodiment 1,2,3 and comparative example are carried out steady
Fixedization is heat-treated, using liquid penetration examination method, i.e. PT detections, the TP347 materials to more than after every kind of Stabilizing Heat Treatment
The carry out defects detection of pipeline, detection position is weld seam, and time of penetration is 10min, and drying time is 5min, and time of developing is
10min, the size of the vestige after observation bleeding agent imaging, as shown in table 1.
Table 1
By embodiment 1 and comparative example, the present invention largely reduces bead crack by postwelding pretreatment
Size, lifted weldquality；Meanwhile, the present invention is by postwelding pretreatment again to the TP347 material pipes containing stabilizing element
Road carries out Stabilizing Heat Treatment, while using the complex heat-preservation cotton of better heat preservation, effectively eliminating bead crack, lifting weldering
Stitch quality.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details.
Claims (8)
1. a kind of TP347 materials pipeline postwelding stabilizing heat treatment method, it is characterised in that right before Stabilizing Heat Treatment
TP347 materials pipeline carries out postwelding pretreatment, including：Persistently lead to respectively at the two ends of the TP347 material pipeline relative with weld seam
It is 92%N to enter by volume fraction2And 8%CO2The protective gas of composition, while being heated to weld seam, when temperature reaches 400 DEG C, stops
Only heat, keep 2~3h, be cooled to 100 DEG C, weld seam is handled using ultrasonic impact equipment after circulating 5~8 times,
4~5h of infra-red radiation finally is carried out to TP347 materials pipeline；
Wherein, the flow of protective gas be 20L/min, to weld seam heat scope control apart from weld seam per side 100~
200mm, 400 DEG C are increased to during heating with 40 DEG C/h heating rate, with 15 DEG C/h rate of temperature fall 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 is 200~
600μm。
2. TP347 materials pipeline postwelding stabilizing heat treatment method as claimed in claim 1, it is characterised in that ultrasonic impact
Including：Equidistantly rule shape parallel to weld seam simultaneously perpendicular to weld seam along face of weld with wet fine rule is dipped in through coloured aqueous coating
Into grid array format, spacing is at least 1st/20th of weld seam total length, and the spacing quantity perpendicular to weld seam is at least ten
Individual, ultrasonic impact equipment has impact gun, impact gun is aligned and perpendicular to weld seam, remote successively along the array point close to weld seam
Carry out shock treatment.
3. TP347 materials pipeline postwelding stabilizing heat treatment method as claimed in claim 2, it is characterised in that TP347 materials
Pipeline contains stabilizing element niobium, titanium, yttrium, zirconium, with yttrium, the mixed weight ratio of zirconium is 4~6 wherein after niobium, titanium mixing:1, its
The weight ratio of four mixing and carbon is 9~10.
4. TP347 materials pipeline postwelding stabilizing heat treatment method as claimed in claim 3, it is characterised in that stabilize heat
Processing comprises the following steps：
1) TP347 materials pipeline is placed smooth, be fixed using backing plate or clamping device；
2) using electric boiling plate to step 1) in treated weld metal zone heat, weld metal zone often side heated perimeter at least
It is 5 times of the thickness of the tube wall of TP347 material pipelines, while being 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 temperature control/survey
Galvanic couple is warmed in the equidistant spot welding in weld seam both sides；
4) the TP347 materials pipeline by weld metal zone per side is wound with heat-preservation cotton wraps up, and the heat-preserving range per side is at least TP347
7 times of the thickness of the tube wall of material pipeline, while being greater than 300mm；
5) open electric boiling plate to heat TP347 material pipelines, control heating-up temperature is since 0 DEG C, and programming rate is 50
DEG C/h, when step 2 is arrived in the test of temperature control/temperature thermocouple) in heated perimeter temperature when being increased to 890 DEG C, close electric boiling plate, perseverance
Temperature insulation 6h, then slow cooling cool to 700 DEG C, and control cooling rate is less than 90 DEG C/h, finally natural cooling in atmosphere.
5. TP347 materials pipeline postwelding stabilizing heat treatment method as claimed in claim 4, it is characterised in that heat-preservation cotton by
Under it is supreme be superimposed successively by alumina silicate heat-preservation cotton, asbestos, soft polyurethane foam, nanometer titanium dioxide silica aerogel, aluminum foil heat preserving cotton it is multiple
Conjunction is formed, and its thickness ratio is followed successively by 5:2:1:3:2, gross thickness is more than 100mm；First during winding parcel TP347 material pipelines, silicon
It is close to pipeline external surface in side where sour aluminium heat-preservation cotton.
6. TP347 materials 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 insulation, per side from Weld pipe mill with a distance from control between 300~500mm.
7. TP347 materials pipeline postwelding stabilizing heat treatment method as claimed in claim 6, it is characterised in that weld seam both sides
Between the temperature difference be less than 80 DEG C.
8. the TP347 material pipeline postwelding stabilizing heat treatment methods as described in any one of claim 4~7, it is characterised in that
One end of TP347 material pipelines is blocked during whole Stabilizing Heat Treatment, nitrogen is continually fed into until pipeline from the other end
Inside it is completely filled with stopping during nitrogen, and the other end is blocked, intake is 25L/min.
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| 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 |
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| 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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