CN107553074A - The manufacture method of high-temperature heater UNSN08810 iron nickel base alloy large-calibre seamless tubing - Google Patents
The manufacture method of high-temperature heater UNSN08810 iron nickel base alloy large-calibre seamless tubing Download PDFInfo
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Abstract
The high-temperature heater manufacture method of UNS N08810 iron nickel base alloy large-calibre seamless tubing, it comprises the following steps：Satisfactory side's ingot is gone out using the direct continuous casting of method of arc smelting first, other side's ingot carries out cogging again, then hollow billet is produced using hot piercing process, finally by cold machining process and the Technology for Heating Processing to match and it is aided with tube surfaces handling process, control the even tissue of tubing so that tubing has high-performance and high surface quality.The tubing microscopic structure is equiax crystal, and grain size is 3~5 grades, and the room temperature tensile properties of finished product tubing are：Tensile strength >=500MPa, yield strength >=210MPa, elongation percentage >=50%；650 DEG C of tensile property is：Tensile strength >=400MPa, yield strength >=120MPa, elongation percentage >=50%.
Description
Technical field
The invention belongs to iron nickel base alloy seamless tubular goods processing technique field, and in particular to a kind of high-temperature heater UNS
The manufacture method of N08810 iron nickel base alloy large-calibre seamless tubing.
Background technology
Iron nickel base alloy is a kind of alloy between high-nickel austenite stainless steel and nickel-base alloy.With nickel-base alloy phase
Than, nearly 40-50% nickel can be saved, on the premise of ensureing that alloy substrate has face-centred cubic structure austenite structure, iron nickel
Based alloy can accommodate more contents for being advantageous to improve the element such as alloy corrosion resistance and chromium, molybdenum compared with chromiumnickel austenite stainless steel,
And the heat endurance of alloy generally to be preferred over Gao Ge, the chromiumnickel austenite stainless steel of high molybdenum.In view of the These characteristics of iron nickel base alloy,
By the extensive attention of the departments such as chemical process, turn into the faster a kind of alloy of development.
800 series alloys are Ni-Cr-Fe system anti-corrosion conjunction of the Inco-Corporation companies of the U.S. in exploitation in 1949
Gold, by controlling different C, Al and Ti contents, form UNS N08800, UNS N08810 and tri- boards of UNS N08811
Number, it is respectively applied to different environment.UNS N08810 are to develop to be formed on the basis of UNS N08800 alloys, alloy tool
There are good mechanical behavior under high temperature, higher creep rupture strength, excellent antioxygenic property and certain corrosion resisting property, for a long time
A kind of austenitic structure of stabilization can be kept when under high temperature, enduring quality is excellent；Therefore, UNS N08810 alloys are a large amount of
For manufacturing the catalysing tube in petrochemical industry, convection tube, chilling pipe and cracking tube, radiant tube, sleeve pipe in metallurgical industrial furnace, steaming
Evaporate the high temperature heat exchanger and its accessory in kettle and air cooling nuclear reactor.
It is cold with the fast development of the cold hydrogenation technology of polysilicon industry, and the advantages of UNS N08810 iron nickel base alloys
Nucleus equipment high-temperature heater in hydrogenation technology employs UNS N08810 iron nickel base alloy heavy caliber seamless steel pipes and is processed into
Large-scale disk circle manufacture.Difficult point in UNS N08810 large-calibre seamless pipe (diameter range Φ 168mm- φ 406mm) manufacturing process
Mainly there are the difficult control of heat treatment grain size, mechanical property requirements height, inside and outside surface quality control to be difficult to and due to caused by pickling
The defects of corrosion, surface is easy to crack when causing the coil pipe to process.
Chinese patent CN104328324A discloses a kind of production technology of iron nickel base alloy pipe, but relates only to UNS
The processing technology of N08810 iron nickel base alloys hollow billet and production tube, smelting and the pipe manufacture method in preceding road are not directed to, and it is unknown
The really control method of explanation production tube material surface quality, while hollow billet uses the technique productions of hot extrusion.The technique needs to carry out
Reheating, a reaming, a hot extrusion, the production cycle is long, lumber recovery is low, high energy consumption.It is difficult system using the manufacture method
The UNS N08810 seamless tubular goods with high combination property requirement is produced, particularly polysilicon cold hydrogenation nucleus equipment high temperature adds
The tubing that the large-scale disk circle of hot stove needs, and production cost is higher.
Chinese patent 201010538426.0 discloses a kind of forging rod hot extrusion+shear spinning and processing heavy caliber nickel is thinned
Based alloy tubing.The technique manufacturing cost is high, and production efficiency is relatively low, does not apply to industrialized production, is also not suitable for production high temperature and adds
The tubing that the large-scale disk circle of hot stove needs.
Chinese patent 201010538461.6 discloses the method processing of a kind of centrifugal casting+hot extrusion+cold rolling or cold-drawn
The method of small-diameter, thin-walled nickel-base alloy tubing, the pipe tissue of centrifugal casting is thick in the work manufacturing process, manufactures
Pipe workpiece quality is difficult to meet high performance requirement, while only provides small-diameter, thin-walled nickel-base alloy tubing processing method, and heat
It is high to extrude cost.
A kind of accordingly, it is desirable to provide system of the high-temperature heater iron nickel base alloy heavy caliber pipe of whole process, low cost
Method is made, to produce the UNS N08810 iron nickel base alloy tubing of high combination property requirement, meets that polysilicon cold hydrogenates core
The requirement of the large-scale disk circle tubing of equipment high-temperature heater.
The content of the invention
It is an object of the invention to provide a kind of high-temperature heater UNS N08810 iron nickel base alloy large-calibre seamless pipes
The manufacture method of material, manufacturing cost is low, the manufacturing cycle is short, and tubing lumber recovery is high, and the large-calibre seamless tubing of production can meet more
Crystal silicon heating furnace the manufacture requirement of large-scale coil pipe and 600~900 DEG C of applied at elevated temperature environmental requirements.
To achieve these goals, technical scheme is as follows：
The manufacture method of high-temperature heater UNS N08810 iron nickel base alloy large-calibre seamless tubing, it includes following step
Suddenly：
1) smelt, forge
Smelted using electric arc furnace smelting method, continuous casting goes out UNS N08810 alloy sides ingot, be then forged into middle circle
Pipe, forging deformation amount are controlled 40~60%；
The chemical component weight percentage of the UNS N08810 alloy sides ingot is：C：0.05~0.08%, P≤
0.010%, S≤0.010%, Cr：19.0~23.0%, Ni：30.0~35.0%, Al：0.15~0.60%, Ti：0.15~
0.60%, Fe >=39.5%；Also containing at least one of 0 ＜ Si≤0.5%, 0 ＜ Mn≤1.0%, 0 ＜ Cu≤0.75%；
And above-mentioned element needs to meet following relational expression simultaneously：0.30%≤Al+Ti≤0.70%, remaining is inevitable impurity；
2) circular pipe blank hot piercing is into hollow billet among
A) middle circle heating of pipe blank to 1150~1180 DEG C and is incubated；
B) by the middle circular pipe blank heated, heat wears into hollow billet on hot piercing unit, during hot piercing, middle pipe
For the temperature control of base at 1150~1180 DEG C, hot piercing speed is 50~80mm/s, and enlarged-diameter rate is 5~10%；
C) hollow billet for passing heat carries out water cooling, is cooled to room temperature；
D) hollow billet of water cooling is subjected to oxide skin removal, obtains the flawless hollow billet in surface；
3) processing of finished product tubing
A) cold working：The flawless hollow billet in surface that step 2) is obtained carries out cold rolling, the deformation amount controlling of cold rolling pass
30~50%；If cold rolling pass carries out solution treatment more than twice, between adjacent cold rolling pass, oxide skin removes, solid solution
Treatment temperature is 1050~1130 DEG C,；If cold rolling pass is once, following process is directly carried out；
B) finished product tubing solution treatment, solid solution temperature are 1180~1200 DEG C, water cooling to room temperature；
C) finished product tubing is surface-treated.
Preferably, in step 1), it is described be forged into middle circular pipe blank process it is as follows：First the square ingot smelted is heated
Afterwards, then use fast forging press to carry out deflection to it as 40~60% forging deformation, forge to intermediate specification, then add again
Heat, finally forged using diameter forging machine to casting skin and forge rod, it is the middle circular pipe blank to treat air cooling rear car light.
Preferably, surface smoothness Ra≤1.6 μm of the middle circular pipe blank obtained in step 1).
Preferably, step 2) a) in middle circle heating of pipe blank soaking time be per mm of thickness blank insulation 2~2.5
Minute.
Preferably, the d of step 2)) in, step 3) a) in, the oxide skin removing method is shot-peening+pickling.
It is furthermore preferred that the d of step 2)) in, oxide skin removal is carried out in a manner of shot-peening+pickling, method is as follows：It is right first
Hollow billet surfaces externally and internally carries out bead, then, hollow billet is soaked in the mixed aqueous solution of hydrofluoric acid and nitric acid and removes oxidation
Skin, 10~30min of soak time；In the mixed aqueous solution of above-mentioned hydrofluoric acid and nitric acid, the weight percent concentration of hydrofluoric acid is
2-4%, the weight percent concentration of nitric acid is 5~8%.
It is furthermore preferred that step 3) a) in, tubing oxide skin minimizing technology is as follows after the solution treatment between cold working passage：
The tubing after solution treatment is subjected to bead first, is then soaked in the mixed aqueous solution of hydrofluoric acid and nitric acid and quickly goes
Descale, 10~20min of soak time；In the mixed aqueous solution of above-mentioned hydrofluoric acid and nitric acid, the percentage by weight of hydrofluoric acid
Concentration is 2-4%, and the weight percent concentration of nitric acid is 5~8%.
Preferably, the c of step 3)) in, finished product tubing surface treatment method is as follows：Finished product tubing is carried out at shot-peening first
Reason, then finished product tubing is soaked in quick scale removal in the mixed aqueous solution of hydrofluoric acid and nitric acid, soak time 10~
20min；In the mixed aqueous solution of above-mentioned hydrofluoric acid and nitric acid, the weight percent concentration of hydrofluoric acid is 2~4%, the weight of nitric acid
It is 5~8% to measure percent concentration.
It is furthermore preferred that the d of step 2)) in, step 3) a) in, the c of step 3)) described in during bead：(1)
Inside pipe wall shot-peening：Shot-peening shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, 5.5~6kg of pressure, shower nozzle translational speed
0.6~0.8m/min；(2) outer shot-peening is managed：Shot diameter≤0.3mm, 2.5~10m/min of shower nozzle translational speed；(3) inside pipe wall
Shot-peening number is at least 2 times of outer wall shot-peening number.
Further, the microscopic structure of iron nickel base alloy large-calibre seamless tubing produced by the present invention is equiax crystal, grain size
For 3~5 grades.
Again, the room temperature tensile properties of the iron nickel base alloy large-calibre seamless tubing are：Tensile strength >=500MPa, surrender
Intensity >=210MPa, elongation percentage >=50%；650 DEG C of tensile property is：Tensile strength >=400MPa, yield strength >=
120MPa, elongation percentage >=50%.
The forging deformation amount of pipe is controlled between 40~60% in step 1) of the present invention, it is ensured that the thick tissue of ingot casting
It is completely broken, the dense structure's degree and even tissue of pipe are improved, increases material plasticity.Simultaneously using fast forging and footpath forging heat connection
The forging technology of conjunction, other side's ingot carry out cogging, it is ensured that crushing completely for the square thick tissue of ingot, produce with even tissue
Circular pipe blank, material plasticity is increased, and saved Neng Yuan Xiao Mao.
In step 2), then the present invention is perforated again using middle circular pipe blank is first heated into 1150~1180 DEG C, it is ensured that
Pipe is uniform from outer surface to internal surface temperature, improves the surface quality of tubing.In order to reduce tubing inwall in hot piercing
There is the generation of sparrow skin and outer surface hair check, while the present invention needs to control hot piercing speed for 50~80mm/s and diameter to expand
Big rate is 5~10%.
The d of step 2)) in, when oxide skin removes, bead is carried out to tubing surfaces externally and internally first, changes tube surfaces
The state of densified oxidation scale, oxide skin during its follow-up pickling processes is set easily to come off.
The deflection 30~60% of tubing cold rolling pass is controlled in step 3) cold working：The Alloy At Room Temperature intensity of the present invention
Seriously, cold deformation is limited in one's ability, it is necessary to multi-pass cold machine-shaping for high, material work hardening rate tendency.To realize the cold of product
Shape, organize and the good fitting of size, while reduce infringement to equipment, it is necessary to control the deformation of tubing cold rolling pass
Amount is 30~50%.
In step 3) a), it is 1050~1130 DEG C of solution treatment that trip temperature is entered between adjacent cold working passage, to eliminate
Cold deformation stress.
B in step 3)), the solution treatment that temperature is 1180~1200 DEG C is carried out to finished product tubing, it is possible to achieve tissue
It is uniform, meet high request of the firing equipment to tubing structure property.
The pipe finished inside and outside surface quality of alloy manufacture of the present invention requires high, and defect is easily caused in pickling,
Influence follow-up equipment processing.The present invention increases shot-blast process, while adjust Acidwash solution and match somebody with somebody on traditional acid cleaning process
Than so that tube surfaces reach quality requirement.
The microscopic structure for the finished product tubing (UNS N08810 alloy large-calibre seamless pipe) that the present invention obtains is equiax crystal, brilliant
Granularity is 3~5 grades, and the room temperature tensile properties of finished product tubing are：Tensile strength >=500MPa, yield strength >=210MPa, extension
Rate >=50%；The tensile property that 650 DEG C of finished product tubing is：Tensile strength >=400MPa, yield strength >=120MPa, elongation percentage >=
50%；The compo pipe is >=98% by root ultrasound examination qualification rate according to the requirement of L2 levels in GB/T5777-2008；Interlayer is examined
Qualification rate is tested as 100%；Surfaces externally and internally finish Ra≤3.2 μm of finished product tubing, produced without cracking after coil pipe.
Beneficial effects of the present invention：
1. compared to the manufacturing process of traditional electric arc furnace smelting+electroslag remelting+forging circular pipe blank, the present invention is using electricity
The manufacturing process of arc stove smelting+continuous casting square billet+forging circular pipe blank, reduces electroslag process, and production procedure is short, is manufactured into
This is low.
2. the present invention is using hot piercing process manufacture heavy caliber hollow billet (diameter range Φ 168mm- φ 406mm), it is ensured that pipe
Material interior tissue is uniform, and evenness of wall thickness and external diameter circularity are more preferable, and lumber recovery is high, manufacturing cost is low.
3. the pipe finished inside and outside surface quality of alloy of the present invention manufacture requires high, the present invention using shot-blast process+
Acid cleaning process handles the oxide skin of tube surfaces, so as to avoid the risk of tube surfaces part excessive erosion.
4. the present invention first passes through smelting steel ingot, then it is 20~60% that cogging and controlled forge process deflection are carried out to steel ingot, really
The completely broken of the thick tissue of steel ingot has been protected, the circular pipe blank with even tissue has been produced, increases material plasticity, save simultaneously
Neng Yuan Xiao Mao；Then the hollow billet of even tissue is produced using hot piercing process；Pass through cold-rolling process, supporting heat treatment again
Technique and process of surface treatment, progressively control the even tissue of tubing, and high surface quality, excellent comprehensive so as to obtain having
The tubing of performance is closed, the manufacture requirement particularly suitable for the large-scale coil pipe of polysilicon heating furnace.
Embodiment
Technical scheme is described in further detail with reference to specific embodiment.
Embodiment 1
Specification isUNS N08810 heavy caliber pipes preparation.
1) ingot casting is forged into middle circular pipe blank
Using the method for electric arc furnace smelting, the following UNSN08810 alloy sides of chemical composition (percentage by weight) are melted out
Ingot：
C：0.05%, P：0.005%, S：0.002%, Si：0.3%, Mn：0.5%, Cr：19.0%, Ni：30.0%,
Cu：0.50%, Al：0.15%, Ti：0.15%, Al+Ti：0.30%, Fe >=39.5%, remaining is inevitable impurity.
The size of UNS N08810 alloy cast ingots：Height × width x length=200 × 500 × 3000mm.The square ingot that will have been smelted
Heating, then forged using fast forging press to anise, deflection 60%, then it is heat-fed to heating furnace and is heated, finally used
Diameter forging machine is forged to 241mm casting skins and forges rod, treats air cooling rear car light (circular pipe blank among i.e.), the blank surface of middle circular pipe blank is bright and clean
Spend Ra≤1.6 μm.
2) the light base that circular pipe blank hot piercing is obtained into hollow billet using hot punching machine to step 1) among, as steps described below
Hot piercing process carries out hollow billet hot piercing, and the hollow billet size of hot piercing is
The step of hot piercing is into hollow billet is as follows：
A) 1150 DEG C will be heated to after middle circular pipe blank segment and be incubated, soaking time is that the blank per mm of thickness is incubated
2 minutes；
B) by the middle circular pipe blank heated, heat is worn into hollow billet on hot piercing unit, middle pipe during hot piercing
The temperature of base is 1150 DEG C, and hot piercing speed is 50mm/s, and enlarged-diameter rate is 5.8%.
C) hollow billet that hot piercing goes out quickly is cooled down using water, is cooled to room temperature；
D) hollow billet after cooling is subjected to oxide skin removal, obtains the flawless hollow billet in surface：Tubing shot-peening, then soaks
Quick scale removal, soak time 10min in the mixed aqueous solution of hydrofluoric acid and nitric acid.Above-mentioned hydrofluoric acid and nitric acid mix
In Heshui solution, the weight percent concentration of hydrofluoric acid is 2%, and the weight percent concentration of nitric acid is 8%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：5.5kg, shower nozzle move
Dynamic speed is 0.6 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 2.5 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
3) processing of finished product tubing
A) 1 passes are carried out to the flawless hollow billet in surface that step 2) obtains, i.e., fromPass deformation 47%；
B) to being cold-rolled to finished productSteel pipe carry out finished product solution treatment, solid solubility temperature be 1180 DEG C,
Rapid water is cooled to room temperature after heat treatment；
C) the finished product tubing after solution treatment is surface-treated：By the tubing shot-peening after solution treatment, then soak
Quick scale removal, soak time 10min in the mixed aqueous solution of hydrofluoric acid and nitric acid；Above-mentioned hydrofluoric acid and nitric acid mix
In Heshui solution, the weight percent concentration of hydrofluoric acid is 2%, and the weight percent concentration of nitric acid is 5%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：5.5kg, shower nozzle move
Dynamic speed is 0.6 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 2.5 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
4) product inspection
The microscopic structure of finished product tubing is equiax crystal, and grain size is 3 grades, and the room temperature tensile properties of production tube are：Tension is strong
Spend 540MPa, yield strength 220MPa, elongation percentage 55%；The tensile property that 650 DEG C of production tube is：Tensile strength 450MPa, bend
Take intensity 140MPa, elongation percentage 60%；The compo pipe closes according to the requirement of L2 levels in GB/T5777-2008 by root ultrasound examination
Lattice rate is >=98%；It is 100% that interlayer, which examines qualification rate,；The surfaces externally and internally finish Ra of finished product tubing：3.0 μm, nothing after coil pipe
Cracking produces, and meets the manufacture requirement of the large-scale coil pipe of polysilicon heating furnace.
Embodiment 2
Specification isUNS N08810 heavy caliber pipes preparation.
1) ingot casting is forged into middle circular pipe blank
Using the method for electric arc furnace smelting, the following UNSN08810 alloy sides of chemical composition (percentage by weight) are melted out
Ingot：
C：0.05%, P：0.005%, S：0.002%, Si：0.2%, Mn：0.5%, Cr：19.0%, Ni：30.0%,
Cu：0.20%, Al：0.15%, Ti：0.15%, Al+Ti：0.30%, Fe >=39.5%, remaining is inevitable impurity.
The size of UNS N08810 alloy cast ingots：Height × width x length=200 × 500 × 3000mm.The square ingot that will have been smelted
Heating, then forged using fast forging press to anise, deflection 60%, then it is heat-fed to heating furnace and is heated, finally used
Diameter forging machine is forged to 241mm casting skins and forges rod, treats air cooling rear car light (circular pipe blank among i.e.), the blank surface of middle circular pipe blank is bright and clean
Spend Ra≤1.6 μm.
2) circular pipe blank hot piercing is into hollow billet among
The light base obtained using hot punching machine to step 1), hot piercing process progress hollow billet heat as steps described below are worn
Hole, the hollow billet size of hot piercing are
The step of hot piercing is into hollow billet is as follows：
A) 1180 DEG C will be heated to after the middle circular pipe blank segment of acquisition and be incubated, soaking time is the base per mm of thickness
Material insulation 2.5 minutes；
B) by the middle circular pipe blank heated, heat is worn into hollow billet on hot piercing unit, middle pipe during hot piercing
The temperature of base is 1180 DEG C, and hot piercing speed is 80mm/s, and enlarged-diameter rate is 5.8%；
C) hollow billet that hot piercing goes out quickly is cooled down using water；
D) hollow billet after cooling is subjected to oxide skin removal, obtains the flawless hollow billet in surface；Tubing shot-peening, then soaks
Quick scale removal, soak time 20min in the mixed aqueous solution of hydrofluoric acid and nitric acid.Above-mentioned hydrofluoric acid and nitric acid mix
In Heshui solution, the weight percent concentration of hydrofluoric acid is 4%, and the weight percent concentration of nitric acid is 5%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：6.0kg, shower nozzle move
Dynamic speed is 0.8 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 10 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
3) processing of finished product tubing
A) the flawless hollow billet in surface obtained to step 2) carries out 2 passes extremelyPassage deforms
Amount 40%；
B) solution treatment between 2 passages of cold working：Solid solubility temperature is 1100 DEG C, after solution treatment during scale removal,
Tubing shot-peening, then it is soaked in quick scale removal in the mixed aqueous solution of hydrofluoric acid and nitric acid, soak time 20min.On
In the mixed aqueous solution for stating hydrofluoric acid and nitric acid, the weight percent concentration of hydrofluoric acid is 4%, the weight percent concentration of nitric acid
For 8%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：6.0kg, shower nozzle move
Dynamic speed is 0.8 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 10 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
C) to being cold-rolled to finished productSteel pipe carry out finished product solution treatment, solid solubility temperature be 1200 DEG C,
Rapid water is cooled to room temperature after heat treatment；
D) the finished product tubing after solution heat treatment is surface-treated.Tubing shot-peening, is then soaked in hydrofluoric acid and nitre
Quick scale removal in the mixed aqueous solution of acid, soak time 15min.In the mixed aqueous solution of above-mentioned hydrofluoric acid and nitric acid,
The weight percent concentration of hydrofluoric acid is 3%, and the weight percent concentration of nitric acid is 7%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：6.0kg, shower nozzle move
Dynamic speed is 0.8 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 10 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
4) product inspection
The microscopic structure of finished product tubing is equiax crystal, and grain size is 4.5 grades, and the room temperature tensile properties of production tube are：Tension
Intensity 550MPa, yield strength 230MPa, elongation percentage 55%；The tensile property that 650 DEG C of production tube is：Tensile strength 460MPa,
Yield strength 145MPa, elongation percentage 58%；The compo pipe is according to the requirement of L2 levels in GB/T5777-2008 by root ultrasound examination
Qualification rate is 100%；It is 100% that interlayer, which examines qualification rate,；The surfaces externally and internally finish Ra of finished product tubing：3.0 μm, nothing after coil pipe
Cracking produces, and meets the manufacture requirement of the large-scale coil pipe of polysilicon heating furnace.
Embodiment 3
Specification isUNS N08810 heavy caliber pipes preparation.
1) ingot casting is forged into middle circular pipe blank
Using the method for electric arc furnace smelting, the following UNSN08810 alloy sides of chemical composition (percentage by weight) are melted out
Ingot：
C：0.05%, P：0.005%, S：0.002%, Si：0.3%, Mn：0.4%, Cr：19.0%, Ni：30.0%,
Cu：0.30%, Al：0.15%, Ti：0.15%, Al+Ti：0.30%, Fe >=39.5%, remaining is inevitable impurity.
The size of UNS N08810 alloy cast ingots：Height × width x length=200 × 500 × 3000mm.The square ingot that will have been smelted
Heating, then forged using fast forging press to anise, deflection 40%, then it is heat-fed to heating furnace and is heated, finally used
Diameter forging machine forge toCasting skin forges rod, treats air cooling rear car light (circular pipe blank among i.e.), the blank surface of middle circular pipe blank
Finish Ra≤1.6 μm.
2) circular pipe blank hot piercing is into hollow billet among
The light base obtained using hot punching machine to step 1), hot piercing process progress hollow billet heat as steps described below are worn
Hole, the hollow billet size of hot piercing are
The step of hot piercing is into hollow billet is as follows：
A) 1180 DEG C will be heated to after the middle circular pipe blank segment of acquisition and be incubated, soaking time is the base per mm of thickness
Material insulation 2.5 minutes；
B) by the middle circular pipe blank heated, heat is worn into hollow billet on hot piercing unit, middle pipe during hot piercing
The temperature of base is 1160 DEG C, and hot piercing speed is 60mm/s, enlarged-diameter rate 9.0%；
C) hollow billet that hot piercing goes out quickly is cooled down using water；
D) hollow billet after cooling is subjected to oxide skin removal, obtains the flawless hollow billet in surface；Tubing shot-peening, then soaks
Quick scale removal, soak time 15min in the mixed aqueous solution of hydrofluoric acid and nitric acid.Above-mentioned hydrofluoric acid and nitric acid mix
In Heshui solution, the weight percent concentration of hydrofluoric acid is 3%, and the weight percent concentration of nitric acid is 7%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：6.0kg, shower nozzle move
Dynamic speed is 0.8 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 8 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
3) processing of finished product tubing
A) the flawless hollow billet in surface obtained to step 2) carries out 1 passes and isRoad
Secondary deflection 46%；
B) to being cold-rolled to finished productSteel pipe carry out finished product solution treatment, solid solubility temperature is
1180 DEG C, rapid water is cooled to room temperature after heat treatment；
C) the finished product tubing after solution treatment is surface-treated.Tubing shot-peening, is then soaked in hydrofluoric acid and nitric acid
Mixed aqueous solution in quick scale removal, soak time 15min.In the mixed aqueous solution of above-mentioned hydrofluoric acid and nitric acid, hydrogen
The weight percent concentration of fluoric acid is 3%, and the weight percent concentration of nitric acid is 7%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：6.0kg, shower nozzle move
Dynamic speed is 0.8 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 10 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
4) product inspection
The microscopic structure of finished product tubing is equiax crystal, and grain size is 3 grades, and the room temperature tensile properties of production tube are：Tension is strong
Spend 550MPa, yield strength 230MPa, elongation percentage 57%；The tensile property that 650 DEG C of production tube is：Tensile strength 450MPa, bend
Take intensity 140MPa, elongation percentage 60%；The compo pipe closes according to the requirement of L2 levels in GB/T5777-2008 by root ultrasound examination
Lattice rate is >=98%；It is 100% that interlayer, which examines qualification rate,；The surfaces externally and internally finish Ra of finished product tubing：3.0 μm, nothing after coil pipe
Cracking produces, and meets the manufacture requirement of the large-scale coil pipe of polysilicon heating furnace.
Embodiment 4
Specification isUNS N08810 heavy caliber pipes preparation.
1) ingot casting is forged into middle circular pipe blank
Using the method for electric arc furnace smelting, the following UNSN08810 alloy sides of chemical composition (percentage by weight) are melted out
Ingot：
C：0.07%, P：0.005%, S：0.002%, Si：0.5%, Mn：0.7%, Cr：21.0%, Ni：32.0%,
Cu：0.50%, Al：0.20%, Ti：0.25%, Al+Ti：0.45%, Fe >=39.5%, remaining is inevitable impurity.
The square ingot smelted is heated, then is forged to anise, deflection 20%, then hot sending using fast forging press and extremely added
Hot stove is heated, finally using diameter forging machine forge toCasting skin forges rod, treats air cooling rear car light (i.e. middle pipe
Base), blank surface finish Ra≤1.6 μm of middle circular pipe blank.
2) circular pipe blank hot piercing is into hollow billet among
The light base obtained using hot punching machine to step 1), hot piercing process progress hollow billet heat as steps described below are worn
Hole, the hollow billet size of hot piercing are
The step of hot piercing is into hollow billet is as follows：
A) 1180 DEG C will be heated to after the middle circular pipe blank segment of acquisition and be incubated, soaking time is the base per mm of thickness
Material insulation 2.5 minutes；
B) by the middle circular pipe blank heated, heat is worn into hollow billet on hot piercing unit, middle pipe during hot piercing
The temperature of base is 1170 DEG C, and hot piercing speed is 60mm/s, enlarged-diameter rate 9.5%；
C) hollow billet that hot piercing goes out quickly is cooled down using water；
D) hollow billet after cooling is subjected to oxide skin removal, obtains the flawless hollow billet in surface；Tubing shot-peening, then soaks
Quick scale removal, soak time 15min in the mixed aqueous solution of hydrofluoric acid and nitric acid.Above-mentioned hydrofluoric acid and nitric acid mix
In Heshui solution, the weight percent concentration of hydrofluoric acid is 3%, and the weight percent concentration of nitric acid is 7%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：6.0kg, shower nozzle move
Dynamic speed is 0.8 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 8 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
3) processing of finished product tubing
A) the flawless hollow billet in surface obtained to step 2) carries out 1 passes and isPassage becomes
Shape amount 45.8%；
B) to being cold-rolled to finished productSteel pipe carry out finished product solution treatment, solid solubility temperature is
1180 DEG C, rapid water is cooled to room temperature after heat treatment；
C) the finished product tubing after solution treatment is surface-treated.Tubing shot-peening, is then soaked in hydrofluoric acid and nitric acid
Mixed aqueous solution in quick scale removal, soak time 15min.In the mixed aqueous solution of above-mentioned hydrofluoric acid and nitric acid, hydrogen
The weight percent concentration of fluoric acid is 3%, and the weight percent concentration of nitric acid is 7%.
Above-mentioned bead is as follows：
1. pipe material inner wall shot-peening：Shower nozzle is using diverging shower nozzle, shot diameter≤0.3mm, pressure：6.0kg, shower nozzle move
Dynamic speed is 0.8 m/min.
2. outer pipe wall shot-peening：Shot diameter≤0.3mm, 8 ms/min of shower nozzle translational speed.
3. shot-peening number inwall is 2 times of outer wall.
4) product inspection
The microscopic structure of finished product tubing is equiax crystal, and grain size is 3 grades, and the room temperature tensile properties of production tube are：Tension is strong
Spend 550MPa, yield strength 230MPa, elongation percentage 57%；The tensile property that 650 DEG C of production tube is：Tensile strength 450MPa, bend
Take intensity 140MPa, elongation percentage 60%；The compo pipe closes according to the requirement of L2 levels in GB/T5777-2008 by root ultrasound examination
Lattice rate is >=98%；It is 100% that interlayer, which examines qualification rate,；The surfaces externally and internally finish Ra of finished product tubing：3.0 μm, nothing after coil pipe
Cracking produces, and meets the manufacture requirement of the large-scale coil pipe of polysilicon heating furnace.
The embodiments above detail features of the present invention, but it is not limited only to this, is not departing from this
On the premise of inventive concept, there can also be other changes or improve, and these changes and improvements all fall within the protection of the present invention
Scope.
Claims (11)
1. the high-temperature heater manufacture method of UNS N08810 iron nickel base alloy large-calibre seamless tubing,
It comprises the following steps：
1) smelt, forge：
UNS N08810 alloy sides ingot is gone out using the smelting of electric arc furnace smelting method, continuous casting, middle circular pipe blank is then forged into, forges
Deformation amount controlling is 40~60%；
The chemical component weight percentage of the UNS N08810 alloy sides ingot is：C：0.05~0.08%, P≤0.010%, S
≤ 0.010%, Cr：19.0~23.0%, Ni：30.0~35.0%, Al：0.15~0.60%, Ti：0.15~0.60%, Fe
>=39.5%；Also containing at least one of 0 ＜ Si≤0.5%, 0 ＜ Mn≤1.0%, 0 ＜ Cu≤0.75%；And above-mentioned element
Need to meet following relational expression simultaneously：0.30%≤Al+Ti≤0.70%, remaining is inevitable impurity；
2) circular pipe blank hot piercing is into hollow billet among
A) middle circle heating of pipe blank to 1150~1180 DEG C and is incubated；
B) the middle circular pipe blank heat heated is worn into hollow billet, during hot piercing, the temperature control of middle circular pipe blank is 1150
~1180 DEG C, hot piercing speed is 50~80mm/s, and enlarged-diameter rate is 5~10%；
C) capillary that heat passes is cooled to room temperature；
D) hollow billet after water cooling is subjected to oxide skin removal, obtains the flawless hollow billet in surface；
3) processing of finished product tubing
A) cold working：The flawless hollow billet in surface that step 2) is obtained carries out cold rolling, and every time deformation amount controlling of cold rolling exists
30~50%；If cold rolling pass carries out solution treatment more than twice, between adjacent cold rolling pass, oxide skin removes, at solid solution
It is 1050~1130 DEG C to manage temperature；If cold rolling pass is once, following process is directly carried out；
B) finished product tubing solution treatment：Solid solution temperature is 1180~1200 DEG C, water cooling to room temperature；
C) finished product tubing is surface-treated.
2. the high-temperature heater according to claim 1 manufacture of UNS N08810 iron nickel base alloy large-calibre seamless tubing
Method, it is characterised in that in step 1), it is described be forged into middle circular pipe blank process it is as follows：After first square ingot is heated, then use
Fast forging press other side ingot carries out the forging deformation that deflection is 40~60%, forges to intermediate specification, then reheats, finally adopts
Forged with diameter forging machine to casting skin and forge rod, it is the middle circular pipe blank to treat air cooling rear car light.
3. high-temperature heater according to claim 1 or 2 UNS N08810 iron nickel base alloy large-calibre seamless tubing
Manufacture method, it is characterised in that surface smoothness Ra≤1.6 μm for the middle circular pipe blank that step 1) obtains.
4. the high-temperature heater according to claim 1 manufacture of UNS N08810 iron nickel base alloy large-calibre seamless tubing
Method, it is characterised in that step 2) a) in, middle circle heating of pipe blank soaking time be per mm of thickness blank insulation 2~
2.5 minute.
5. the high-temperature heater according to claim 1 manufacture of UNS N08810 iron nickel base alloy large-calibre seamless tubing
Method, it is characterised in that the d of step 2)) in, step 3) a) in, the oxide skin removing method is shot-peening+pickling.
6. high-temperature heater UNS N08810 iron nickel base alloy large-calibre seamless tubing according to claim 1 or 5
Manufacture method, it is characterised in that the d of step 2)) in, oxide skin minimizing technology is as follows：Hollow billet surfaces externally and internally is sprayed first
Ball processing, then, hollow billet is soaked in quick scale removal in the mixed aqueous solution of hydrofluoric acid and nitric acid, soak time 10~
30min；In the mixed aqueous solution of the hydrofluoric acid and nitric acid, the weight percent concentration of hydrofluoric acid is 2~4%, the weight of nitric acid
It is 5~8% to measure percent concentration.
7. the high-temperature heater seamless diameter pipes of the big mouth of UNS N08810 iron nickel base alloys according to claim 1 or 5
Manufacture method, it is characterised in that step 3) a) in, between adjacent cold working passage after solution treatment tubing oxide skin removal side
Method is as follows：The tubing after solution treatment is subjected to bead first, is then soaked in the mixed aqueous solution of hydrofluoric acid and nitric acid
In quick scale removal, 10~20min of soak time；The weight of hydrofluoric acid in the mixed aqueous solution of the hydrofluoric acid and nitric acid
Percent concentration is 2~4%, and the weight percent concentration of nitric acid is 5~8%.
8. the high-temperature heater according to claim 1 manufacture of UNS N08810 iron nickel base alloy large-calibre seamless tubing
Method, it is characterised in that the c of step 3)) in, the surface treatment of finished product tubing is as follows：Finished product tubing is subjected to bead first,
Finished product tubing is soaked in scale removal in the mixed aqueous solution of hydrofluoric acid and nitric acid, 10~20min of soak time again；It is above-mentioned
In the mixed aqueous solution of hydrofluoric acid and nitric acid, the weight percent concentration of hydrofluoric acid is 2~4%, and the percentage by weight of nitric acid is dense
Spend for 5~8%.
9. the high-temperature heater UNS N08810 iron nickel base alloy large-calibre seamless pipes according to claim any one of 5-8
The manufacture method of material, it is characterised in that during the bead：(1) inside pipe wall shot-peening：Shot-peening shower nozzle is sprayed using diverging
Head, shot diameter≤0.3mm, 5.5~6kg of pressure, 0.6~0.8m/min of shower nozzle translational speed；(2) pipe outer wall shot-peening：
Shot diameter≤0.3mm, 2.5~10m/min of shower nozzle translational speed；(3) inside pipe wall shot-peening number is 2 times of outer wall shot-peening number
More than.
10. the high-temperature heater UNS N08810 iron nickel base alloy large-calibre seamless according to claim any one of 1-9
The manufacture method of tubing, it is characterised in that the microscopic structure of the iron nickel base alloy UNS N08810 heavy caliber pipes is isometric
Crystalline substance, grain size are 3~5 grades.
11. the high-temperature heater UNS N08810 iron nickel base alloy large-calibre seamless according to claim any one of 1-10
The manufacture method of tubing, it is characterised in that the room temperature tensile properties of the iron nickel base alloy UNS N08810 heavy caliber pipes are：
Tensile strength >=500MPa, yield strength >=210MPa, elongation percentage >=50%；650 DEG C of tensile property is：Tensile strength >=
400MPa, yield strength >=120MPa, elongation percentage >=50%.
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