CN106378365A - Preparation method of GH625 high-temperature alloy tube blank - Google Patents
Preparation method of GH625 high-temperature alloy tube blank Download PDFInfo
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- CN106378365A CN106378365A CN201610806666.5A CN201610806666A CN106378365A CN 106378365 A CN106378365 A CN 106378365A CN 201610806666 A CN201610806666 A CN 201610806666A CN 106378365 A CN106378365 A CN 106378365A
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- 239000000956 alloy Substances 0.000 title claims abstract description 43
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000005242 forging Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 238000007689 inspection Methods 0.000 claims abstract description 8
- 230000006698 induction Effects 0.000 claims abstract description 7
- 230000002950 deficient Effects 0.000 claims abstract description 4
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 238000007670 refining Methods 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000227 grinding Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract 2
- 238000005520 cutting process Methods 0.000 abstract 1
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- 239000000243 solution Substances 0.000 description 4
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- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001192 hot extrusion Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
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- 238000005097 cold rolling Methods 0.000 description 2
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- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003064 anti-oxidating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000005336 cracking Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910001055 inconels 600 Inorganic materials 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
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- 239000006104 solid solution Substances 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/055—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 20% but less than 30%
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a preparation method of a GH625 high-temperature alloy tube blank. The preparation method comprises the steps of manufacturing an electrode bar through adopting a vacuum induction melting method; after the electrode bar is subjected to surface polishing, putting the electrode bar into an electroslag remelting furnace to be subjected to electroslag remelting, so as to obtain an electroslag steel ingot; after cogging of the electroslag steel ingot, cutting and grinding defective parts, and putting the electroslag steel ingot into a forging heating furnace to be subjected to heat preservation forging; after ultrasonic nondestructive inspection of the electroslag steel ingot subjected to heat preservation forging, processing the electroslag steel ingot to obtain a bar material; processing a centering hole in the center of the excircle at one end of the bar material; putting the bar material with the processed centering hole into a heating furnace to be heated; carrying out three-roll piercing on the heated bar material through utilizing a three-roll cross-rolling piercer; and carrying out water cooling on the bar material subjected to three-roll piercing to the room temperature to form the GH625 high-temperature alloy tube blank. Through utilization of the preparation method, the finished product rate of the tube blank can be increased.
Description
Technical field
The present invention relates to base pipe manufacturing technology field, more specifically, it is related to a kind of preparation of GH625 high temperature alloy pipe
Method.
Background technology
The typical process that low cost batch prepares seamless tube blank pipe is referred to as hot piercing.Unremitting through decades both at home and abroad
Effort, currently for the high-temperature alloy material of most of solution strengthening classes, all can pass through this working procedure processing, so that
Most of solid solution type high temp alloys can prepare all size seamless pipe material with inexpensive mode batch.Typical nickel-base high-temperature closes
Golden material has：GH3030, Inconel600, Inconel601 etc..
Male sportsman, generally refer mainly to precipitation strength type high temperature alloy and W the very high solution strengthening type of Mo content
High temperature alloy (as GH625, GH163 etc.) generally has excellent comprehensive serviceability, such as alloy have higher elevated temperature strength,
Excellent antioxidation and decay resistance etc., but due to containing aluminum, titanium, niobium etc. in its chemical composition, formed big during high-temperature aging
Hardening constituent between the metal of amount so that while alloy strengthening, the plasticity and toughness of material decline, make material various processing characteristicies,
Especially thermal processing distortion is difficult.
Due to male sportsman thermoplasticity low it is impossible to prepare seamless tube blank with hot piercing mode.Adopt at present
Mode mainly has：(1) depth drill mode：Not only lumber recovery is extremely low, and is difficult to prepare the tubing having length requirement；(2) hot extrusion
Mode：Though the seamless tube blank of various length can be prepared, remain a need for first preparing heavy wall pipe with depth drill mode, then
Seamless tube blank is prepared on Hot Extrusion Equipment.Not only equipment investment is very big, and stock utilization is very low, and cost is that generally heat is worn
The several times of hole mode.
Using the seamless tube blank of aforesaid way processing, calculated with bar, the lumber recovery only 30-40% of seamless tube blank,
Far below more than 70% being reached using hot piercing mode.
For the problems referred to above, GH625 is typical solution strengthening type high temperature alloy it is impossible to by common hot piercing mode
Prepare seamless tube blank, bar depth drill can only be passed through；Or after first deep hole, then seamless pipe is prepared using hot extrusion mode
Pipe.Not only long preparation period, high cost, and lumber recovery is very low, generally 30-40%.
Content of the invention
In view of the above problems, it is an object of the invention to provide a kind of preparation method of GH625 high temperature alloy pipe, including：
Step S100：Method using vacuum induction melting makes electrode bar；In the method system using vacuum induction melting
During making electrode bar, C, Cr, Ni, Co, Mo, Fe, Nb, P and the S in GH625 high temperature alloy composition is contained in crucible
Portion and/or bottom high-temperature region, Al and Ti in GH625 high temperature alloy composition are loaded in lattice feeder, vacuum reaches 10
-2Pa magnitude and following, refining time 20～30min, casting forms electrode bar；
Step S101：Electrode bar, after the polishing of surface, is put into electroslag refining furnace and is carried out electroslag remelting acquisition electroslag ingot；Its
In, the Ingredients Weight proportioning of slag charge is：CaF2：Al2O3：CaO4=76:20:4, the slag charge preparing is put in batch-type furnace and carries out
Baking, baking temperature is maintained at 690 DEG C -710 DEG C, and insulation was taken out after 4 hours；And, electroslag remelting is being carried out to electrode bar
During, in electroslag refining furnace, rise after electrode bar and after electric arc, the slag charge through overbaking is uniformly added into along fire door surrounding, will melt
Pond uniform fold, after electrode bar refuse and solidification, obtains electroslag ingot；
Step S102：After by electroslag ingot cogging, defective position is cut net and grinds net, enter forge furnace and carry out
Insulation forging；Wherein, at 1130 DEG C -1150 DEG C, forging temperature controls at 1120 DEG C -1140 DEG C cogging heating and temperature control, eventually
Forging temperature control is in 930 DEG C of ＞；
Step S103：It is processed after the nondestructive inspection of ultrasound wave in the electroslag ingot through insulation forging,
Obtain bar；
Step S104：In the center processing internal point that bar one end is cylindrical；
Step S105：The bar of processing internal point is put into heating furnace heated；
Step S106：Using three high cross piercing machine, three roll piercing is carried out to the bar after heating；
Step S107：Water-cooled is carried out to the bar after three roll piercing, is cooled to room temperature and forms GH625 high temperature alloy pipe.
Beneficial effects of the present invention are：
1st, take advanced vacuum melting technique and argon protection electroslag remelting process, obtain composition even tissue, high-purity
The alloy pig of cleanliness, and pass through temperature control heat forging technology, obtain the high alloy bar of thermoplasticity.
2nd, adopt three roller hot piercing modes, and be directed to male sportsman, by grinding to hot piercing process parameter
Study carefully, obtain a kind of high temperature deformation temperature with regard to male sportsman and incline with rolled by piercing mill drafts, roll rotational speed, roll
The reasonable combination at angle, realize male sportsman seamless tube blank efficiently, the process for producing of short route so as to lumber recovery from
Current 30-40% brings up to more than 70%.
Specific embodiment
In the following description, for purposes of illustration, in order to provide the comprehensive understanding to one or more embodiments, explain
Many details are stated.It may be evident, however, that these embodiments can also be realized in the case of not having these details.
The bar composition that the present invention enters eleven punch 11 is as shown in the table, and the composition of alloy all meets in GB GB/T14992-94
With regard to the requirement of GH625, from technic metal component content analysis, material of the present invention is low impurity content, one-tenth
Uniform high cleanliness alloy material is knitted in packet.
Table 1
Wherein, the fusing point of this nine kinds of elements of C, Cr, Ni, Co, Mo, Fe, Nb, P, S is high and not oxidizable, and Al and Ti belongs to
Active element.
The preparation method of the GH625 high temperature alloy pipe that the present invention provides, including：
Step S100：Method using vacuum induction melting makes electrode bar.
Melting is carried out to GH625 high temperature alloy using vacuum induction melting furnace, during shove charge, accomplishes the principle of " upper Panasonic is tight ",
And high for fusing point and not oxidizable C, Cr, Ni, Co, Mo, Fe, Nb, P and S element is contained in middle part and/or the bottom high temperature of crucible
Area, active element Al and Ti is loaded in lattice feeder, vacuum reaches 10-2Pa magnitude and following, refining time 20～
30min, casting forms electrode bar.
Step S101：Electrode bar, after the polishing of surface, is put into electroslag refining furnace and is carried out electroslag remelting acquisition electroslag ingot.
The Ingredients Weight proportioning of slag charge is：CaF2：Al2O3：CaO4=76:20:4, the slag charge preparing is put in batch-type furnace
Toasted, baking temperature is maintained at 690 DEG C -710 DEG C, insulation was taken out after 4 hours, the weight that every stove prepares slag charge is 2-
2.5kg；During carrying out electroslag remelting to electrode bar, in electroslag refining furnace, rising after electrode bar will be through overbaking after electric arc
Roasting slag charge is uniformly added into along fire door surrounding, and by molten bath uniform fold, melt tank reaction is stably advisable, again melting with electrode bar
Change and solidify, finally give smooth surface, the electroslag ingot of the defect such as surrounded surface no shrinkage cavity.
The back cut diameter of the water mold that the present invention adopts is 120mm, and lower port diameter is 140mm, the molten speed of electrode bar
For 1kg/min, stainless steel protection cover is fixed on crystallizer top, and during smelting electrode rod, in protective cover, through-flow speed is
The argon of 30-35L/min, can make slag and electrode not oxidized by argon protection, thus deoxidizer need not be added, effectively anti-
Only oxygen supplement and hydrogenation, improves the degree of purity of steel ingot, and effectively reduces melting loss of elements.
Step S102：After by electroslag ingot cogging, defective position is cut net and grinds net, enter forge furnace and carry out
Insulation forging；Wherein, at 1130 DEG C -1150 DEG C, forging temperature controls at 1120 DEG C -1140 DEG C cogging heating and temperature control, eventually
Forging temperature control is in 930 DEG C of ＞.
Step S103：It is processed after the nondestructive inspection of ultrasound wave in the electroslag ingot through insulation forging,
Obtaining specification isBar.
The size of bar in the present inventionAfter the size determining bar, machining turning, final
To composition even tissue, flawless high-quality bar.
Step S104：In bar one end, cylindrical center processing is a diameter ofDepth is 15mm-
The internal point of 25mm.
Because GH625 high temperature alloy intensity is higher, on the basis of many experiments, if directly taking atresia bar to be worn
Hole, gained seamless tube blank all has the situation of serious cracking to occur, thus the present invention takes in one end of GH625 high temperature alloy bar
Cylindrical center processing is a diameter ofDepth is the mode of the internal point of 15mm-25mm, to ensure to bore a hole
It is smoothed out., compared with traditional boring process, due to only machining small, after machining small, bar lumber recovery can be 80% for the method
Above and pipe excellent in mechanical performance.GH625 high temperature alloy is solution strengthening high temperature alloy, moulding better, therefore, it can
Carry out three roller hot piercings after blind hole is beaten in one end of bar.
Step S105：The bar of processing internal point is put into heating furnace heated.
GH625 high temperature alloy bar needs to be heated before three roll piercing, GH625 high temperature alloy bar heating technique
Major parameter have charging temperature, firing rate, heating-up temperature and temperature retention time.Heating cycle is bored a hole the most for high temperature alloy
Important, by with test diagram of forgeability behaviour compare with alloy free forging temperature, and practical puncture test etc. method, determine optimal
Perforation heating-up temperature.
Research shows：Perforation heating-up temperature is shown in Table 2, and this external heat is also noted that enough temperature retention times, particularly right
In male sportsman,Between bar temperature retention time 60-90min of left and right, to ensure the alloying element such as Cr, Mo in tissue
Fully dissolve, to reduce resistance of deformation, thus improving plasticity.
Table 2
| Steel grade | Charging temperature (DEG C) | Firing rate (DEG C/h) | Heating-up temperature (DEG C) | Temperature retention time (min) |
| GH625 | 450-500 | 50-60 | 1090-1110 | 60-90 |
When the top of GH625 high temperature alloy bar is heated to 600-700 DEG C about, from heating furnace, take out bar,
And carry out rapidly three roll piercing.
Step S106：Using three high cross piercing machine, three roll piercing is carried out to the bar after heating.
In order that perforation specific energy consumption is less big and ensures punching rate faster, study on the basis of many experiments
Find, for GH625 high temperature alloy, penetrating parameter should select：Decrement δ=10-15%, decrement δ before top0=5-9%,
Feed angle α=4～6 ° are more suitable.
Wherein, each meaning of parameters or computing formula are as follows：
Decrement is pipe diameter total reduction, equal to pipe overall diameter drafts than pipe diameter, that is, δ=WhereinFor pipe diameter, d0For roll larynx footpath.
Decrement δ before top0, i.e. diameter reduction ratio at the front position of top for the pipe diameter,C
For top head front-extending quantity, that is, the distance between roll intermediate zone median plane is arrived in top front end, and β is roll cone angle.
Feed angle α is the angle between roll axis and roll line project on a vertical plane.
When δ mono- timing, when C increases, then δ0Can reduce.During three roll piercing, if δ0Select too small, easily make before rolled piece card or
Produce unstable；If δ0Select excessive, power consumption increases, and card after rolled piece occurs.The preferred δ of the present invention0=5%.
The feed angle α of three roll piercing is larger on perforation impact, and the bigger then punching rate of general feed angle is higher, and bores a hole
Specific energy consumption also decreases.For the GH625 high temperature alloy that resistance of deformation is larger, less feed angle should be selected, as far as possible
Reduction specific energy consumption, it is to avoid produce push rod bending, therefore, the present invention preferred feed angle α=4.5 °.
The technological parameter of three roll piercing is as shown in the table：
Table 3
| The trade mark | GH625 |
| Roller diameter | 240mm |
| Roll spacing | 8-14mm |
| Top head front-extending quantity | 25-30mm |
| Roll rotational speed | 80r/min |
| Feed angle | 4.5 degree |
| Decrement | 10-15% |
| Bar size | Φ50×300 |
| Top size | 33.5×70mm |
| Piercing temperature | 1100℃ |
| Aperture time | 30-40s |
| Tube blank size | 49*5.5-6.5*700mm |
The technological process of three roll piercing is：
1st, check before starting shooting
A, the hot standby lubrication circumstances of inspection are refueled in time, and whether cooling water is unobstructed；
Whether b, inspection drive apparatus are normal, have clear, whether each connecting portion is firm；
Whether the instruments such as c, inspection top, push rod, push rod are complete；
2 main frame adjustment
Whether a, inspection roll and rolling centerline pile, and adjustment roll spacing is equal to 9.4mm；
B, adjustment feed angle are to 4.5 °；
C, adjustment mair motor rotating speed 1400r/min；
3 stabilising arrangement adjustment
Roller and armful roller openings of sizes in a, regulation machine；
B, regulation discharging carrying roller height；
4 start to produce
A, adjustment top head front-extending quantity C；
B, the bar that will take out from heating furnace, put into rapidly pan feeding guide rail, start to bore a hole.
Step S107：Water-cooled is carried out to the bar after three roll piercing, is cooled to room temperature and forms GH625 high temperature alloy pipe.
Abjection top and core bar after bar hot piercing, fall into tank immediately and are cooled to room temperature, form GH625 high temperature alloy pipes
Base.
High temperature alloy constituent content is high, and in cooling procedure, easy carbide precipitate and secondary-precipitated phase, cause material
The acute variation of energy, simultaneously for guaranteeing subsequently cold rolling being smoothed out, the pipe of the formation after having bored a hole should enter water cooling immediately,
It is cooled to room temperature to take out, reduce hardness so that follow-up cold rolling cold-drawn operation.
Compared with tradition directly punching manufacture pipe technique, the present invention takes the seamless tube blank of hot piercing preparation, not only has
There is higher lumber recovery, and possess preferable mechanical property.Comparing result is as shown in the table：The lumber recovery of pipe of the present invention is
More than 2 times of traditional handicraft.
Table 4
Claims (5)
1. a kind of preparation method of GH625 high temperature alloy pipe, including：
Step S100：Method using vacuum induction melting makes electrode bar；Make electricity in the method using vacuum induction melting
Extremely rod during, by C, Cr, Ni, Co, Mo, Fe, Nb, P and the S in GH625 high temperature alloy composition be contained in crucible middle part and/
Or bottom high-temperature region, Al and Ti in GH625 high temperature alloy composition is loaded in lattice feeder, vacuum reaches 10-2Pa amount
Level and following, refining time 20～30min, casting forms described electrode bar；
Step S101：Described electrode bar, after the polishing of surface, is put into electroslag refining furnace and is carried out electroslag remelting acquisition electroslag ingot；Its
In, the Ingredients Weight proportioning of slag charge is：CaF2：Al2O3：CaO4=76:20:4, the slag charge preparing is put in batch-type furnace and carries out
Baking, baking temperature is maintained at 690 DEG C -710 DEG C, and insulation was taken out after 4 hours；And, electroslag weight is being carried out to described electrode bar
In molten process, in electroslag refining furnace, after described electrode bar plays electric arc, the slag charge through overbaking is uniform along fire door surrounding
Add, molten bath uniform fold, after described electrode bar refuse and solidification, obtains described electroslag ingot；
Step S102：After by described electroslag ingot cogging, defective position is cut net and grinds net, enter forge furnace and carry out
Insulation forging；Wherein, at 1130 DEG C -1150 DEG C, forging temperature controls at 1120 DEG C -1140 DEG C cogging heating and temperature control, eventually
Forging temperature control is in 930 DEG C of ＞；
Step S103：After the nondestructive inspection of ultrasound wave, it is processed in the electroslag ingot through insulation forging, obtains
Bar；
Step S104：In the center processing internal point that described bar one end is cylindrical；
Step S105：The bar of processing internal point is put into heating furnace heated；
Step S106：Using three high cross piercing machine, three roll piercing is carried out to the bar after heating；
Step S107：Water-cooled is carried out to the bar after three roll piercing, is cooled to room temperature and forms GH625 high temperature alloy pipe.
2. the preparation method of GH625 high temperature alloy pipe as claimed in claim 1, wherein, using three high cross piercing machine pair
Before bar after heating carries out three roll piercing, arranged as follows：
The feed angle of described three high cross piercing machine is adjusted to 4～6 °；
Decrement before the top of described three high cross piercing machine is adjusted to 5%-9%；
The pipe diameter total reduction of described three high cross piercing machine is adjusted to 10%-15%.
3. the preparation method of GH625 high temperature alloy pipe as claimed in claim 1, wherein, will have the bar of internal point
Put into during heating furnace heated,
Charging temperature is 450 DEG C -500 DEG C；
Firing rate is 50-60 DEG C/h；
Heating-up temperature is 1090 DEG C -1110 DEG C；
Temperature retention time is 60-90min.
4. the preparation method of GH625 high temperature alloy pipe as claimed in claim 1, wherein, to electrode in electroslag refining furnace
During rod carries out electroslag remelting,
It is passed through the argon that flow velocity is 30-35L/min into described electroslag refining furnace.
5. the preparation method of GH625 high temperature alloy pipe as claimed in claim 1, wherein, the bar of acquisition in step S103
Specification beIn described bar one end, cylindrical center processing is a diameter ofDepth
Internal point for 15mm-25mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108715939A (en) * | 2018-07-06 | 2018-10-30 | 抚顺特殊钢股份有限公司 | A kind of electric slag refusion and smelting technique of the N06625 alloys of high-purity segregation-free |
| CN109468561A (en) * | 2018-11-27 | 2019-03-15 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of preparation method of GH3625 alloy strip steel rolled stock |
| CN111187933A (en) * | 2019-12-27 | 2020-05-22 | 国机金属江苏有限公司 | Method for manufacturing UNS N06617 small-caliber pipe |
| CN111618095A (en) * | 2020-06-12 | 2020-09-04 | 攀钢集团江油长城特殊钢有限公司 | Preparation method of UNS N06690 nickel-based alloy pierced billet |
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| CN100368145C (en) * | 2004-12-24 | 2008-02-13 | 中国科学院金属研究所 | Method for processing nickel based tubular product made from high temperature alloy |
| CN101526157B (en) * | 2008-08-27 | 2012-03-28 | 北京科源科金属材料有限公司 | High-efficiency, short-flow, superhigh-forming-rate and high-temperature alloy seamless pipe integration technology |
| CN101787492B (en) * | 2010-03-17 | 2012-05-23 | 上海大学 | Manufacturing method of high quality and large size mandril blank |
| CN102069369A (en) * | 2010-12-30 | 2011-05-25 | 天津冶金集团天材科技发展有限公司 | Processing technology of high-temperature alloy GH600 |
| CN103611759B (en) * | 2013-12-10 | 2015-07-08 | 江苏宏宝集团有限公司 | Production process of hollow tube blank |
| CN104745830A (en) * | 2013-12-31 | 2015-07-01 | 上海精胤镍合金材料科技有限公司 | Manufacturing technique of pure nickel tube |
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| CN108715939A (en) * | 2018-07-06 | 2018-10-30 | 抚顺特殊钢股份有限公司 | A kind of electric slag refusion and smelting technique of the N06625 alloys of high-purity segregation-free |
| CN109468561A (en) * | 2018-11-27 | 2019-03-15 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of preparation method of GH3625 alloy strip steel rolled stock |
| CN111187933A (en) * | 2019-12-27 | 2020-05-22 | 国机金属江苏有限公司 | Method for manufacturing UNS N06617 small-caliber pipe |
| CN111187933B (en) * | 2019-12-27 | 2021-09-17 | 国机金属江苏有限公司 | Method for manufacturing UNS N06617 small-caliber pipe |
| CN111618095A (en) * | 2020-06-12 | 2020-09-04 | 攀钢集团江油长城特殊钢有限公司 | Preparation method of UNS N06690 nickel-based alloy pierced billet |
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