CN109280788A - A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking - Google Patents
A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking Download PDFInfo
- Publication number
- CN109280788A CN109280788A CN201811469384.6A CN201811469384A CN109280788A CN 109280788 A CN109280788 A CN 109280788A CN 201811469384 A CN201811469384 A CN 201811469384A CN 109280788 A CN109280788 A CN 109280788A
- Authority
- CN
- China
- Prior art keywords
- alloy
- temperature
- ingot
- furnace
- alloy pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- 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
- 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
- C22B9/20—Arc remelting
-
- 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%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Plasma & Fusion (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of techniques for preventing GH625 alloy pipe weld stress corrosion cracking, implement according to following procedure: vacuum induction melting prepares electrode ingot, and electroslag remelting prepares ingot casting, clears up ingot casting surface and is welded with dummy electrode, vacuum consumable remelting is carried out to ingot casting, homogenization heat treatment, hammer cogging squeeze preparation GH625 alloy pipe, welding, welding line joint is detected, stress relief annealing process, final welding inspection.The present invention significantly improves the metallurgical quality of GH625 alloy pipe welding line joint, reduces the residual stress of welding point, avoids weld cracking caused by stress corrosion, improves the service life and reliability of welding assembly.
Description
Technical field
The invention belongs to high temperature alloy processing technique fields, and in particular to one kind prevents GH625 alloy pipe weld stress
The technique of corrosion cracking.
Background technique
Currently, the welding of GH625 alloy pipe mainly uses gas tungsten arc welding or argon arc welding, passage is more, welds
Stitch narrow, welded stress is larger, and high residual stress will lead to the violent stress corrosion cracking of weld seam.Welding causes residual stress
The reason of rising is as caused by volume change in the alloy graining crystallization process of weld metal zone and temperature gradient.In addition, GH625 is closed
Carbon (C) content of gold is higher (close to 0.1%Wt), and carbide exists mostly in the form of MC type (NbC), M6C type in alloy, studies table
Bright, for postwelding compared with before weldering, weld seam position has the Carbide Precipitations such as chromium carbide, and excessive brittle carbides also result in alloy weldering
Stress corrosion cracking tendency is stitched to increase.Therefore, alloy degree of purity is improved by improving smelting technology, at innovative design destressing heat
Annealing process is managed, the cracking of GH625 alloy welding point caused by residual stress can be prevented.
GH625 (also known as GH3625, corresponding U.S.'s trade mark are Inconel 625) is that nickel (Ni)-chromium (Cr) base solid solution is strong
Change type wrought superalloy, with Cr, molybdenum (Mo), niobium (Nb) for main solution strengthening element, maximum operation (service) temperature reaches 950 DEG C,
With good tensile strength and anti-fatigue performance.Alloy Cr content reaches 20.0~23.0%Wt, has good antioxygen
Change, corrosion resistance, and the ability of preferable resistance to various saline solutions, nitric acid and phosphoric acid corrosion.Currently, GH625 alloy is wide
It is general to be used to manufacture various Aeronautics and Astronautics engine parts, combustion engine pipeline, nuclear reactor and petrochemical equipment.
The main preparation process route vacuum induction melting+electroslag furnace remelting of GH625 alloy, vacuum induction melting+true
Two kinds of processes of empty self-consuming furnace remelting.Wherein, vaccum sensitive stove is to utilize (intermediate frequency) electromagnetic induction in gold under vacuum conditions
Belonging to generation vortex heat in material makes its fusing, by the refining process of electromagnetic agitation, generates the alloy material for being precisely controlled ingredient.It is molten
Vacuum outgas (O, N, H) occurs during refining, the volatilization of low melting point harmful element, decomposes and the physical-chemical reactions such as flotation.Melting
When high vacuum atmosphere be conducive to remove gas and field trash, keep N, H, O and inclusion content in alloy all very low.In addition, having
Evil impurity Pb, Bi, Te, Cd, Sn etc. pass through volatilization removal in a vacuum.And electroslag furnace is one that clean metal material melting uses
Kind important equipment, electroslag furnace cast the bottom end of (forging) ingot electrode using the slag thermal resistance fusing of electric current, and highdensity molten alloy droplets pass through
The slag bath for floating on liquid metal bath surface, by the cleaning suction-operated of conductive slag, in copper water mold
Inside it is frozen into ingot casting.The technological advantage of electroslag remelting includes ceramic inclusions, elementary sulfur (S) and the gas significantly reduced in alloy
Content eliminates the metallurgical imperfections such as loose, hole in ingot casting.The most important process advantage of electroslag remelting is exactly that de- S effect is aobvious
It writes.In addition, consumable electrode vacuum furnace (also known as vacuum arc furnace ignition) is the important equipment of wrought superalloy melting.Its technological principle is
Use direct-current arc as high temperature heat source under vacuum and without slag environment, melted alloy electrode, electrode tip metal is to melt thin layer
It forms molten drop and the interior simultaneously consecutive solidification ingot of red copper matter water mold is dripped to by arc region.The technological advantage of vacuum consumable remelting
It is to be conducive to remove or reduce the pernicious gas (such as N, H, O) in alloy；Further decrease harmful low melting point microelement (such as
Bi, Ag, Sb etc.) content；No refractory material contact, avoids ceramic inclusions from polluting；Mitigate chemical element segregation, reduces in ingot casting
Heart shrinkage cavity, form and distribution etc. loose, while that improve ceramic inclusions.
No matter metal parts (including GH625 alloy pipe) all can in inside generate by hot-working or cold working process
Residual stress.Due to a variety of causes such as preparation process, working environments, the residual stress in GH625 tubing can not be eliminated thoroughly, be cut
Real feasible scheme is to reduce or reduce residual stress within the scope of controllably.Common method has natrual ageing, destressing to move back
Fire and 3 kinds of oscillating aging.Natrual ageing, which refers to, stores weldment through a long time, makes residual stress slow relaxation.This method
It needs the time longer and stress elimination and is not thorough for high temperature alloy；Stress relief annealing is that workpiece is heated to certain temperature
It after degree, is kept the temperature by the long period, then Slow cooling.De-stress annealing effect is related with heating temperature and soaking time, adds
Hot temperature is higher, goes de-stress more thorough, and required soaking time is also fewer；Oscillating aging is a kind of mechanical removal strain method,
At this stage in wrought superalloy product using less, need further to conduct a research.
Due to being limited by detection depth and detection zone, to metal parts residual stress test method and prepared
Examination criteria is also different.The method of the external high temperature alloy product residual stress of detection at present mainly has X-ray diffraction method
(XRD method), neutron diffraction method, layer-by-layer stripping method, boring method etc..The remnants in wrought superalloy product are reduced by annealing to answer
Power is an effective process；It is usually as-rolled condition before the welding of GH625 alloy pipe, at a temperature of 650 DEG C~900 DEG C
After Long-term Aging, it can be precipitated γ ' ' phase, δ phase, M23C6 and M6C type carbide, and the timeliness within the scope of 780 DEG C~850 DEG C, it is main
δ phase is precipitated；It is main that γ ' ' phase is precipitated at a temperature of 650 DEG C~700 DEG C after timeliness, and the only a small amount of analysis of timeliness under 900 DEG C of high temperature
Phase out, alloy mechanical property and solid solution state are close.Therefore, using different destressing heat treatment technique, to the mechanical property of weld seam
There can be larger impact.GH625 alloy pipe mainly uses gas tungsten arc welding or argon arc welding at present, seam organization and
Feature is substantially change afterwards before welding, and not only with the presence of NbC, and carbide precipitate Cr23C6, weld seam carbide increase,
Increase stress corrosion cracking tendency；GH625 alloy is then welded by pre-welding heat treatment, can be generated in weld seam along crystalline substance
Carbide corrosion area equally will increase stress corrosion cracking wind if corrode area carbide cannot be precipitated from the crystal boundary of commissure
Danger.Suitable post weld heat treatment technique enables to intergranular carbide to be distributed in even weld, reduces residual stress, avoids welding
The weld stress corrosion cracking of connector.
Summary of the invention
The object of the present invention is to provide a kind of techniques for preventing GH625 alloy pipe weld stress corrosion cracking, solve
The problem of GH625 alloy pipe weld weld stress cracks in the prior art.
The technical scheme adopted by the invention is that a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking,
It is specifically implemented according to the following steps:
Step 1, vacuum induction melting
Ni, Cr, Mo in GH625 alloying component is transferred in crucible by barrel, by the working chamber of vaccum sensitive stove and
Ingot mould room carries out vacuumize process, after vacuumizing, carries out melting, after Ni, Cr, Mo are completely melting down, then passes through feeder
Nb item, C, Al, Ti element is added, after Nbization is clear, refining by GH625 alloy casting into ingot mould, carries out after being cooled to room temperature
Demoulding, machining removal head and tail portion, obtain GH625 alloy electrode ingot；
Step 2, electroslag remelting is carried out using the electroslag furnace with argon atmosphere protective device
The dummy electrode of GH625 alloy electrode ingot and electroslag furnace that step 1 obtains is welded with argon arc welding, is put after lifting
Enter electroslag furnace, be put into the crystalliser feet of electroslag furnace and open arc plate and 500g~800g slag, be passed through argon gas, the power transmission starting the arc starts
Melting persistently adds slag by feeder after forming alloy pool in crystallizer, until electrode ingot residue 20mm, stops
Fusing, is cooled to room temperature, obtains GH625 alloy cast ingot；
Step 3, the surface slag crust for the GH625 alloy cast ingot that step 2 obtains is cleared up, then machines removal GH625
The oxide skin on alloy cast ingot surface；
Step 4, vacuum consumable remelting
The dummy electrode of the GH625 alloy cast ingot and consumable electrode vacuum furnace that handle through step 3 is welded, then GH625 is closed
Golden ingot casting is fitted into consumable electrode vacuum furnace, carries out vacuumize process, and after vacuumizing, the power transmission starting the arc starts melting, opens vacuum
The intake valve of self-consuming furnace is passed through helium into the crystallizer of consumable electrode vacuum furnace and is cooled down, after fusing, power failure and helium,
GH625 alloy cast ingot is cooled to room temperature by the recirculated water in consumable electrode vacuum furnace crystallizer again；
Step 5, homogenization heat treatment
The GH625 alloy cast ingot handled through step 4 is added in heat-treatment furnace at room temperature and is heated；
Step 6, hammer cogging will be carried out using quick forging machine through step 5 treated GH625 alloy cast ingot, and will be cooled to room
Temperature obtains semi-finished product GH625 alloy bar material, by the surface vehicle light of semi-finished product GH625 alloy bar material, is cut into tube extrusion materials
Section, obtains GH625 alloy bar material；
Step 7, the GH625 alloy bar material that step 6 obtains is perforated with hot punching machine and thermal expansion hole, obtain
GH625 alloy pipe stock, then GH625 alloy pipe stock is squeezed with extruder, GH625 alloy seamless pipe is obtained, by GH625 alloy seamless
Pipe carries out solid hot melt processing, then mechanical process seamless pipe surface and defective position is removed, obtain GH625 compo pipe
Material；
Step 8, the GH625 alloy pipe that step 8 obtains is welded using argon arc welding；
Step 9, the GH625 alloy pipe handled using the lossless detection methods such as fluorescence, X-ray or ultrasound detecting step 8
Welding line joint quality flawless welded seam area is subjected to stress relief annealing；
Step 10, the GH625 alloy pipe handled through step 9 is answered with Portable X-ray residual stress test instrument
Power inspection, weld residual stress value are not higher than 200MPa.
The features of the present invention also characterized in that
In step 1, the vacuum degree < 1Pa of vacuumize process, refining time is 3min~8min.
In step 2, the slag slag system of electroslag remelting is composed of the following components by mass percentage: CaF260~70%,
CaO15~20%, Al2O315~20%, the sum of mass percent of the above component is 100%.
In step 4, consumable electrode vacuum furnace is using molten drop solidification control forming Melting control system, the vacuum degree of vacuumize process
< 1Pa, speed of melting are 5Kg/min~25Kg/min, and the pressure for being passed through helium is 30bar~50bar.
In step 5, GH625 alloy cast ingot center portion region heating temperature is 1100 DEG C~1120 DEG C, keeps the temperature 5h~10h.
In step 7, thermal expansion hole temperature is 1095 DEG C~1125 DEG C, and the heating temperature in extrusion process is 1130 DEG C~1170
℃。
In step 8, welding uses GH625 alloy welding wire.
In step 9, the process of stress relief annealing are as follows: the welded seam area of GH625 compo pipe is put into Rotary Electric Furnace, by ring
The temperature of shape resistance furnace from room temperature to 580 DEG C~600 DEG C, keep the temperature 10min after, with the speed of 10 DEG C/min by temperature from
580 DEG C~600 DEG C rise to 890 DEG C~930 DEG C, keep the temperature 30min, then with the speed of 10 DEG C/min by temperature from 890 DEG C~930 DEG C
It is cooled to room temperature taking-up.
The beneficial effects of the present invention are:
(1) a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking of the present invention, it is molten using vaccum sensitive stove
Refining, electroslag furnace remelting and vacuum consumable remelting smelting technology, improve alloy degree of purity, reduce harmful element content, as sulphur,
Phosphorus etc. improves the metallurgical quality of GH625 alloy pipe weld seam；
(2) a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking of the present invention, at the destressing heat of use
Temperature reaches 900 DEG C or more in science and engineering skill, and γ ' ' phase is mainly precipitated in GH625 alloy timeliness at a temperature of 650 DEG C~700 DEG C,
δ phase can be precipitated in timeliness within the scope of 780 DEG C~850 DEG C, and timeliness only has a small amount of precipitated phase under 900 DEG C of high temperature, can guarantee alloy
Mechanical property does not reduce, while high annealing enables to weld residual stress release more abundant.
Specific embodiment
The present invention is described in detail With reference to embodiment.
A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking, the carbon in dispensing requirements GH625 alloy
(C) spectrum electrode carbon is used, and C content ingredient target value takes 0.02%wt, existed while guaranteeing alloy strength excessive
Carbide；The upper limit of the inclined GH625 alloy component range of Al, Ti constituent content controls；Remaining element according to GH625 alloy change
It learns ingredient standard range intermediate value and carries out ingredient, wherein by mass percentage by as follows at being grouped as: C:0.02%；Cr:21%；
Nb:3.5%；Mo:9%；Al:0.2%；Ti:0.2%；Ni: surplus, the sum of each component mass percent are 100%, are specifically pressed
Implement according to following steps:
Step 1, GH625 alloy electrode ingot is prepared using the method for vacuum induction melting:
Ni, Cr, Mo in GH625 alloying component is transferred in crucible by barrel, by the working chamber of vaccum sensitive stove and
Ingot mould room carries out vacuumize process, terminates when vacuum degree < 1Pa, carries out melting, after Ni, Cr, Mo are completely melting down, then passes through
Nb item, C is added in feeder, and after Nbization is clear, refining 3min~8min is cooled to room temperature by GH625 alloy casting into ingot mould
After demoulded, machining removal head and tail portion obtains GH625 alloy electrode ingot；
Step 2, electroslag remelting is carried out using the electroslag furnace with argon atmosphere protective device:
The dummy electrode of GH625 alloy electrode ingot and electroslag furnace that step 1 obtains is welded with argon arc welding, is put after lifting
Enter electroslag furnace, be put into the crystalliser feet of electroslag furnace and open arc plate and 500g~800g slag, be passed through argon gas, the power transmission starting the arc starts
Melting persistently adds slag by feeder after forming alloy pool in crystallizer, until electrode ingot residue 20mm, stops
Fusing, is cooled to room temperature, obtains GH625 alloy cast ingot；
Wherein, the slag slag system of electroslag remelting is composed of the following components by mass percentage: CaF260~70%, CaO15
~20%, Al2O315~20%, the sum of mass percent of the above component is 100%；
Step 3, the surface slag crust for the GH625 alloy cast ingot that step 2 obtains is cleared up, then machines removal GH625
The oxide skin on alloy cast ingot surface；
Step 4, vacuum consumable weight is carried out using the consumable electrode vacuum furnace for solidifying control forming Melting control system with molten drop
It is molten:
The dummy electrode of the GH625 alloy cast ingot and consumable electrode vacuum furnace that handle through step 3 is welded, then GH625 is closed
Golden ingot casting is fitted into consumable electrode vacuum furnace, is carried out vacuumize process, is terminated when vacuum degree < 1Pa, and the power transmission starting the arc starts melting, is melted
Refining speed is 5Kg/min~25Kg/min, opens the intake valve of consumable electrode vacuum furnace, is passed through helium into the crystallizer of consumable electrode vacuum furnace
Gas is cooled down, and the pressure of helium is 30bar~50bar, and after fusing, power failure and helium are crystallized by consumable electrode vacuum furnace
Recirculated water in device is cooled to room temperature GH625 alloy cast ingot；
Step 5, homogenization heat treatment
The GH625 alloy cast ingot handled through step 4 is added in heat-treatment furnace at room temperature and is heated, GH625
Alloy cast ingot center portion region heating temperature keeps the temperature 5h~10h to 1100 DEG C~1120 DEG C；
Step 6, hammer cogging, cogging temperature will be carried out using quick forging machine through step 5 treated GH625 alloy cast ingot
It 1110 DEG C~1130 DEG C, is cooled to room temperature, obtains semi-finished product GH625 alloy bar material, by the surface of semi-finished product GH625 alloy bar material
Che Guang is cut into tube extrusion materials section, obtains GH625 alloy bar material；
Step 7, the GH625 alloy bar material that step 6 obtains is perforated with hot punching machine and carries out thermal expansion hole, thermal expansion hole
1095 DEG C~1125 DEG C of temperature, GH625 alloy pipe stock is obtained, then with extruder under conditions of temperature is 1130 DEG C~1170 DEG C
GH625 alloy pipe stock is squeezed, GH625 alloy seamless pipe is obtained, GH625 alloy seamless pipe is subjected to solid hot melt processing, then machine adds
The surface of work processing seamless simultaneously removes defective position, obtains GH625 alloy pipe；
Step 8, using GH625 alloy welding wire, the GH625 alloy pipe that step 8 is obtained using the method for argon arc welding into
Row welding；
Step 9, the GH625 alloy pipe handled using the lossless detection methods such as fluorescence, X-ray or ultrasound detecting step 8
Welding line joint quality flawless welded seam area is subjected to stress relief annealing, specifically: by the weld metal zone of GH625 compo pipe
Domain is put into Rotary Electric Furnace, by the temperature of Rotary Electric Furnace from room temperature to 580 DEG C~600 DEG C, after keeping the temperature 10min, with 10
DEG C/temperature rises to 890 DEG C~930 DEG C from 580 DEG C~600 DEG C by the speed of min, 30min is kept the temperature, then with the speed of 10 DEG C/min
Temperature is cooled to room temperature taking-up from 890 DEG C~930 DEG C；
The mechanical property and corrosion resistance of GH625 alloy grain size and its uniformity butt joint weld seam have an impact,
Crystal grain is about tiny, and grain boundary area is bigger, and crystal boundary is also more tortuous, is also more conducive to the extension of Crack prevention, and alloy strength
It is relatively high, in addition, for carbide dissolution temperature at 1120~1180 DEG C, heat treatment temperature is more than 1120 DEG C in GH625 alloy, it is brilliant
Boundary loses the pinning effect of carbide, and crystal grain can sharply grow up, and stress relief annealing temperature is not only able to delay near 900 DEG C
Welding residual stress is solved, meanwhile, precipitated phase excessive in alloy is avoided, weld properties and the original solid solution state of alloy are maintained
It is close；
Step 10, the GH625 alloy pipe handled through step 9 is answered with Portable X-ray residual stress test instrument
Power inspection, weld residual stress value are not higher than 200MPa (lower than the 1/3 of GH625 alloy base metal yield strength)；Guarantee tubing
Requirement.
Embodiment 1
A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking, the carbon in dispensing requirements GH625 alloy
(C) spectrum electrode carbon is used, and C content ingredient target value takes 0.02%wt, existed while guaranteeing alloy strength excessive
Carbide；Al, Ti constituent content 0.4%wt；Remaining element is carried out according to the chemical component critical field intermediate value of GH625 alloy
Ingredient, wherein by mass percentage by as follows at being grouped as: C:0.02%；Cr:21%；Nb:3.5%；Mo:9%；Al:
0.2%；Ti:0.2%；Ni: surplus, the sum of each component mass percent are 100%, are specifically implemented according to the following steps:
Step 1, GH625 alloy electrode ingot is prepared using the method for vacuum induction melting:
Ni, Cr, Mo in GH625 alloying component is transferred in crucible by barrel, by the working chamber of vaccum sensitive stove and
Ingot mould room carries out vacuumize process, terminates when vacuum degree < 1Pa, carries out melting, after Ni, Cr, Mo are completely melting down, then passes through
Nb item, C is added in feeder, and after Nbization is clear, refining 5min is carried out after being cooled to room temperature by GH625 alloy casting into ingot mould
Demoulding, machining removal head and tail portion, obtain GH625 alloy electrode ingot；
Step 2, electroslag remelting is carried out using the electroslag furnace with argon atmosphere protective device:
The dummy electrode of GH625 alloy electrode ingot and electroslag furnace that step 1 obtains is welded with argon arc welding, is put after lifting
Entering electroslag furnace, be put into the crystalliser feet of electroslag furnace and open arc plate and 650g slag, is passed through argon gas, the power transmission starting the arc starts melting,
After forming alloy pool in crystallizer, slag is persistently added by feeder, until electrode ingot residue 20mm, stops fusing,
It is cooled to room temperature, obtains GH625 alloy cast ingot；
Wherein, the slag slag system of electroslag remelting is composed of the following components by mass percentage: CaF260%, CaO20%,
Al2O320%, the sum of mass percent of the above component is 100%；
Step 3, the surface slag crust for the GH625 alloy cast ingot that step 2 obtains is cleared up, then machines removal GH625
The oxide skin on alloy cast ingot surface；
Step 4, vacuum consumable weight is carried out using the consumable electrode vacuum furnace for solidifying control forming Melting control system with molten drop
It is molten:
The dummy electrode of the GH625 alloy cast ingot and consumable electrode vacuum furnace that handle through step 3 is welded, then GH625 is closed
Golden ingot casting is fitted into consumable electrode vacuum furnace, is carried out vacuumize process, is terminated when vacuum degree < 1Pa, and the power transmission starting the arc starts melting, is melted
Refining speed is 15Kg/min, opens the intake valve of consumable electrode vacuum furnace, and it is cold that helium progress is passed through into the crystallizer of consumable electrode vacuum furnace
But, the pressure of helium is 40bar, and after fusing, power failure and helium pass through the recirculated water pair in consumable electrode vacuum furnace crystallizer
GH625 alloy cast ingot is cooled to room temperature；
Step 5, homogenization heat treatment
The GH625 alloy cast ingot handled through step 4 is added in heat-treatment furnace at room temperature and is heated, GH625
Alloy cast ingot center portion region heating temperature keeps the temperature 8h to 1110 DEG C；
Step 6, hammer cogging, cogging temperature will be carried out using quick forging machine through step 5 treated GH625 alloy cast ingot
It 1120 DEG C, is cooled to room temperature, obtains semi-finished product GH625 alloy bar material, the surface vehicle light of semi-finished product GH625 alloy bar material is cut
It is cut into tube extrusion materials section, obtains GH625 alloy bar material；
Step 7, the GH625 alloy bar material that step 6 obtains is perforated with hot punching machine and carries out thermal expansion hole, thermal expansion hole
1110 DEG C of temperature, GH625 alloy pipe stock is obtained, then GH625 compo pipe is squeezed under conditions of temperature is 1150 DEG C with extruder
Base obtains GH625 alloy seamless pipe, and GH625 alloy seamless pipe is carried out solid hot melt processing, then the table of mechanical process seamless pipe
Face simultaneously removes defective position, obtains GH625 alloy pipe；
Step 8, using GH625 alloy welding wire, the GH625 alloy pipe that step 8 is obtained using the method for argon arc welding into
Row welding；
Step 9, the GH625 alloy pipe handled using the lossless detection methods such as fluorescence, X-ray or ultrasound detecting step 8
Welding line joint quality flawless welded seam area is subjected to stress relief annealing, specifically: by the weld metal zone of GH625 compo pipe
Domain is put into Rotary Electric Furnace, by the temperature of Rotary Electric Furnace from room temperature to 600 DEG C, after keeping the temperature 10min, with 10 DEG C/min's
Temperature is risen to 910 DEG C from 600 DEG C by speed, keeps the temperature 30min, then temperature is down to room temperature from 910 DEG C with the speed of 10 DEG C/min
After take out；
Step 10, the GH625 alloy pipe handled through step 9 is answered with Portable X-ray residual stress test instrument
Power inspection, weld residual stress value are not higher than 200MPa (lower than the 1/3 of GH625 alloy base metal yield strength).
Embodiment 2
A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking, the carbon in dispensing requirements GH625 alloy
(C) spectrum electrode carbon is used, and C content ingredient target value takes 0.02%wt, existed while guaranteeing alloy strength excessive
Carbide；Al, Ti constituent content 0.4%wt；Remaining element is carried out according to the chemical component critical field intermediate value of GH625 alloy
Ingredient, wherein by mass percentage by as follows at being grouped as: C:0.02%；Cr:21%；Nb:3.5%；Mo:9%；Al:
0.2%；Ti:0.2%；Ni: surplus, the sum of each component mass percent are 100%, are specifically implemented according to the following steps:
Step 1, GH625 alloy electrode ingot is prepared using the method for vacuum induction melting:
Ni, Cr, Mo in GH625 alloying component is transferred in crucible by barrel, by the working chamber of vaccum sensitive stove and
Ingot mould room carries out vacuumize process, terminates when vacuum degree < 1Pa, carries out melting, after Ni, Cr, Mo are completely melting down, then passes through
Nb item, C, Al, Ti element is added in feeder, and after Nbization is clear, refining 3min is cooled to by GH625 alloy casting into ingot mould
It is demoulded after room temperature, machining removal head and tail portion obtain GH625 alloy electrode ingot；
Step 2, electroslag remelting is carried out using the electroslag furnace with argon atmosphere protective device:
The dummy electrode of GH625 alloy electrode ingot and electroslag furnace that step 1 obtains is welded with argon arc welding, is put after lifting
Entering electroslag furnace, be put into the crystalliser feet of electroslag furnace and open arc plate and 500g slag, is passed through argon gas, the power transmission starting the arc starts melting,
After forming alloy pool in crystallizer, slag is persistently added by feeder, until electrode ingot residue 20mm, stops fusing,
It is cooled to room temperature, obtains GH625 alloy cast ingot；
Wherein, the slag slag system of electroslag remelting is composed of the following components by mass percentage: CaF265%, CaO17%,
Al2O318%, the sum of mass percent of the above component is 100%；
Step 3, the surface slag crust for the GH625 alloy cast ingot that step 2 obtains is cleared up, then machines removal GH625
The oxide skin on alloy cast ingot surface；
Step 4, vacuum consumable weight is carried out using the consumable electrode vacuum furnace for solidifying control forming Melting control system with molten drop
It is molten:
The dummy electrode of the GH625 alloy cast ingot and consumable electrode vacuum furnace that handle through step 3 is welded, then GH625 is closed
Golden ingot casting is fitted into consumable electrode vacuum furnace, is carried out vacuumize process, is terminated when vacuum degree < 1Pa, and the power transmission starting the arc starts melting, is melted
Refining speed is 10Kg/min, opens the intake valve of consumable electrode vacuum furnace, and it is cold that helium progress is passed through into the crystallizer of consumable electrode vacuum furnace
But, the pressure of helium is 30bar, and after fusing, power failure and helium pass through the recirculated water pair in consumable electrode vacuum furnace crystallizer
GH625 alloy cast ingot is cooled to room temperature；
Step 5, homogenization heat treatment
The GH625 alloy cast ingot handled through step 4 is added in heat-treatment furnace at room temperature and is heated, GH625
Alloy cast ingot center portion region heating temperature keeps the temperature 5h to 1120 DEG C；
Step 6, hammer cogging, cogging temperature will be carried out using quick forging machine through step 5 treated GH625 alloy cast ingot
It 1110 DEG C, is cooled to room temperature, obtains semi-finished product GH625 alloy bar material, the surface vehicle light of semi-finished product GH625 alloy bar material is cut
It is cut into tube extrusion materials section, obtains GH625 alloy bar material；
Step 7, the GH625 alloy bar material that step 6 obtains is perforated with hot punching machine and carries out thermal expansion hole, thermal expansion hole
1095 DEG C of temperature, GH625 alloy pipe stock is obtained, then GH625 compo pipe is squeezed under conditions of temperature is 1170 DEG C with extruder
Base obtains GH625 alloy seamless pipe, and GH625 alloy seamless pipe is carried out solid hot melt processing, then the table of mechanical process seamless pipe
Face simultaneously removes defective position, obtains GH625 alloy pipe；
Step 8, using GH625 alloy welding wire, the GH625 alloy pipe that step 8 is obtained using the method for argon arc welding into
Row welding；
Step 9, the GH625 alloy pipe handled using the lossless detection methods such as fluorescence, X-ray or ultrasound detecting step 8
Welding line joint quality flawless welded seam area is subjected to stress relief annealing, specifically: by the weld metal zone of GH625 compo pipe
Domain is put into Rotary Electric Furnace, by the temperature of Rotary Electric Furnace from room temperature to 590 DEG C, after keeping the temperature 10min, with 10 DEG C/min's
Temperature is risen to 930 DEG C from 590 DEG C by speed, keeps the temperature 30min, then temperature is down to room temperature from 930 DEG C with the speed of 10 DEG C/min
After take out；
Step 10, the GH625 alloy pipe handled through step 9 is answered with Portable X-ray residual stress test instrument
Power inspection, weld residual stress value are not higher than 200MPa (lower than the 1/3 of GH625 alloy base metal yield strength).
Embodiment 3
A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking, the carbon in dispensing requirements GH625 alloy
(C) spectrum electrode carbon is used, and C content ingredient target value takes 0.02%wt, existed while guaranteeing alloy strength excessive
Carbide；Al, Ti constituent content 0.4%wt；Remaining element is carried out according to the chemical component critical field intermediate value of GH625 alloy
Ingredient, wherein by mass percentage by as follows at being grouped as: C:0.02%；Cr:21%；Nb:3.5%；Mo:9%；Al:
0.2%；Ti:0.2%；Ni: surplus, the sum of each component mass percent are 100%, are specifically implemented according to the following steps:
Step 1, GH625 alloy electrode ingot is prepared using the method for vacuum induction melting:
Ni, Cr, Mo in GH625 alloying component is transferred in crucible by barrel, by the working chamber of vaccum sensitive stove and
Ingot mould room carries out vacuumize process, terminates when vacuum degree < 1Pa, carries out melting, after Ni, Cr, Mo are completely melting down, then passes through
Nb item, C, Al, Ti element is added in feeder, and after Nbization is clear, refining 8min is cooled to by GH625 alloy casting into ingot mould
It is demoulded after room temperature, machining removal head and tail portion obtain GH625 alloy electrode ingot；
Step 2, electroslag remelting is carried out using the electroslag furnace with argon atmosphere protective device:
The dummy electrode of GH625 alloy electrode ingot and electroslag furnace that step 1 obtains is welded with argon arc welding, is put after lifting
Entering electroslag furnace, be put into the crystalliser feet of electroslag furnace and open arc plate and 800g slag, is passed through argon gas, the power transmission starting the arc starts melting,
After forming alloy pool in crystallizer, slag is persistently added by feeder, until electrode ingot residue 20mm, stops fusing,
It is cooled to room temperature, obtains GH625 alloy cast ingot；
Wherein, the slag slag system of electroslag remelting is composed of the following components by mass percentage: CaF270%, CaO15%,
Al2O315%, the sum of mass percent of the above component is 100%；
Step 3, the surface slag crust for the GH625 alloy cast ingot that step 2 obtains is cleared up, then machines removal GH625
The oxide skin on alloy cast ingot surface；
Step 4, vacuum consumable weight is carried out using the consumable electrode vacuum furnace for solidifying control forming Melting control system with molten drop
It is molten:
The dummy electrode of the GH625 alloy cast ingot and consumable electrode vacuum furnace that handle through step 3 is welded, then GH625 is closed
Golden ingot casting is fitted into consumable electrode vacuum furnace, is carried out vacuumize process, is terminated when vacuum degree < 1Pa, and the power transmission starting the arc starts melting, is melted
Refining speed is 25Kg/min, opens the intake valve of consumable electrode vacuum furnace, and it is cold that helium progress is passed through into the crystallizer of consumable electrode vacuum furnace
But, the pressure of helium is 50bar, and after fusing, power failure and helium pass through the recirculated water pair in consumable electrode vacuum furnace crystallizer
GH625 alloy cast ingot is cooled to room temperature；
Step 5, homogenization heat treatment
The GH625 alloy cast ingot handled through step 4 is added in heat-treatment furnace at room temperature and is heated, GH625
Alloy cast ingot center portion region heating temperature keeps the temperature 10h to 1100 DEG C；
Step 6, hammer cogging, cogging temperature will be carried out using quick forging machine through step 5 treated GH625 alloy cast ingot
It 1130 DEG C, is cooled to room temperature, obtains semi-finished product GH625 alloy bar material, the surface vehicle light of semi-finished product GH625 alloy bar material is cut
It is cut into tube extrusion materials section, obtains GH625 alloy bar material；
Step 7, the GH625 alloy bar material that step 6 obtains is perforated with hot punching machine and carries out thermal expansion hole, thermal expansion hole
1125 DEG C of temperature, GH625 alloy pipe stock is obtained, then GH625 compo pipe is squeezed under conditions of temperature is 1130 DEG C with extruder
Base obtains GH625 alloy seamless pipe, and GH625 alloy seamless pipe is carried out solid hot melt processing, then the table of mechanical process seamless pipe
Face simultaneously removes defective position, obtains GH625 alloy pipe；
Step 8, using GH625 alloy welding wire, the GH625 alloy pipe that step 8 is obtained using the method for argon arc welding into
Row welding；
Step 9, the GH625 alloy pipe handled using the lossless detection methods such as fluorescence, X-ray or ultrasound detecting step 8
Welding line joint quality flawless welded seam area is subjected to stress relief annealing, specifically: by the weld metal zone of GH625 compo pipe
Domain is put into Rotary Electric Furnace, by the temperature of Rotary Electric Furnace from room temperature to 580 DEG C, after keeping the temperature 10min, with 10 DEG C/min's
Temperature is risen to 890 DEG C from 580 DEG C by speed, keeps the temperature 30min, then temperature is down to room temperature from 890 DEG C with the speed of 10 DEG C/min
After take out；
Step 10, the GH625 alloy pipe handled through step 9 is answered with Portable X-ray residual stress test instrument
Power inspection, weld residual stress value are not higher than 200MPa (lower than the 1/3 of GH625 alloy base metal yield strength).
Embodiment 4
A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking, the carbon in dispensing requirements GH625 alloy
(C) spectrum electrode carbon is used, and C content ingredient target value takes 0.02%wt, existed while guaranteeing alloy strength excessive
Carbide；Al, Ti constituent content 0.4%wt；Remaining element is carried out according to the chemical component critical field intermediate value of GH625 alloy
Ingredient, wherein by mass percentage by as follows at being grouped as: C:0.02%；Cr:21%；Nb:3.5%；Mo:9%；Al:
0.2%；Ti:0.2%；Ni: surplus, the sum of each component mass percent are 100%, are specifically implemented according to the following steps:
Step 1, GH625 alloy electrode ingot is prepared using the method for vacuum induction melting:
Ni, Cr, Mo in GH625 alloying component is transferred in crucible by barrel, by the working chamber of vaccum sensitive stove and
Ingot mould room carries out vacuumize process, terminates when vacuum degree < 1Pa, carries out melting, after Ni, Cr, Mo are completely melting down, then passes through
Nb item, C, Al, Ti element is added in feeder, and after Nbization is clear, refining 4min is cooled to by GH625 alloy casting into ingot mould
It is demoulded after room temperature, machining removal head and tail portion obtain GH625 alloy electrode ingot；
Step 2, electroslag remelting is carried out using the electroslag furnace with argon atmosphere protective device:
The dummy electrode of GH625 alloy electrode ingot and electroslag furnace that step 1 obtains is welded with argon arc welding, is put after lifting
Entering electroslag furnace, be put into the crystalliser feet of electroslag furnace and open arc plate and 600g slag, is passed through argon gas, the power transmission starting the arc starts melting,
After forming alloy pool in crystallizer, slag is persistently added by feeder, until electrode ingot residue 20mm, stops fusing,
It is cooled to room temperature, obtains GH625 alloy cast ingot；
Wherein, the slag slag system of electroslag remelting is composed of the following components by mass percentage: CaF263%, CaO17%,
Al2O320%, the sum of mass percent of the above component is 100%；
Step 3, the surface slag crust for the GH625 alloy cast ingot that step 2 obtains is cleared up, then machines removal GH625
The oxide skin on alloy cast ingot surface；
Step 4, vacuum consumable weight is carried out using the consumable electrode vacuum furnace for solidifying control forming Melting control system with molten drop
It is molten:
The dummy electrode of the GH625 alloy cast ingot and consumable electrode vacuum furnace that handle through step 3 is welded, then GH625 is closed
Golden ingot casting is fitted into consumable electrode vacuum furnace, is carried out vacuumize process, is terminated when vacuum degree < 1Pa, and the power transmission starting the arc starts melting, is melted
Refining speed is 5Kg/min, opens the intake valve of consumable electrode vacuum furnace, and it is cold that helium progress is passed through into the crystallizer of consumable electrode vacuum furnace
But, the pressure of helium is 35bar, and after fusing, power failure and helium pass through the recirculated water pair in consumable electrode vacuum furnace crystallizer
GH625 alloy cast ingot is cooled to room temperature；
Step 5, homogenization heat treatment
The GH625 alloy cast ingot handled through step 4 is added in heat-treatment furnace at room temperature and is heated, GH625
Alloy cast ingot center portion region heating temperature keeps the temperature 9h to 1105 DEG C；
Step 6, hammer cogging, cogging temperature will be carried out using quick forging machine through step 5 treated GH625 alloy cast ingot
It 1115 DEG C, is cooled to room temperature, obtains semi-finished product GH625 alloy bar material, the surface vehicle light of semi-finished product GH625 alloy bar material is cut
It is cut into tube extrusion materials section, obtains GH625 alloy bar material；
Step 7, the GH625 alloy bar material that step 6 obtains is perforated with hot punching machine and carries out thermal expansion hole, thermal expansion hole
1100 DEG C of temperature, GH625 alloy pipe stock is obtained, then GH625 compo pipe is squeezed under conditions of temperature is 1140 DEG C with extruder
Base obtains GH625 alloy seamless pipe, and GH625 alloy seamless pipe is carried out solid hot melt processing, then the table of mechanical process seamless pipe
Face simultaneously removes defective position, obtains GH625 alloy pipe；
Step 8, using GH625 alloy welding wire, the GH625 alloy pipe that step 8 is obtained using the method for argon arc welding into
Row welding；
Step 9, the GH625 alloy pipe handled using the lossless detection methods such as fluorescence, X-ray or ultrasound detecting step 8
Welding line joint quality flawless welded seam area is subjected to stress relief annealing, specifically: by the weld metal zone of GH625 compo pipe
Domain is put into Rotary Electric Furnace, by the temperature of Rotary Electric Furnace from room temperature to 580 DEG C, after keeping the temperature 10min, with 10 DEG C/min's
Temperature is risen to 910 DEG C from 580 DEG C by speed, keeps the temperature 30min, then temperature is down to room temperature from 910 DEG C with the speed of 10 DEG C/min
After take out；
Step 10, the GH625 alloy pipe handled through step 9 is answered with Portable X-ray residual stress test instrument
Power inspection, weld residual stress value are not higher than 200MPa (lower than the 1/3 of GH625 alloy base metal yield strength).
Embodiment 5
A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking, the carbon in dispensing requirements GH625 alloy
(C) spectrum electrode carbon is used, and C content ingredient target value takes 0.02%wt, existed while guaranteeing alloy strength excessive
Carbide；Al, Ti constituent content 0.4%wt；Remaining element is carried out according to the chemical component critical field intermediate value of GH625 alloy
Ingredient, wherein by mass percentage by as follows at being grouped as: C:0.02%；Cr:21%；Nb:3.5%；Mo:9%；Al:
0.2%；Ti:0.2%；Ni: surplus, the sum of each component mass percent are 100%, are specifically implemented according to the following steps:
Step 1, GH625 alloy electrode ingot is prepared using the method for vacuum induction melting:
Ni, Cr, Mo in GH625 alloying component is transferred in crucible by barrel, by the working chamber of vaccum sensitive stove and
Ingot mould room carries out vacuumize process, terminates when vacuum degree < 1Pa, carries out melting, after Ni, Cr, Mo are completely melting down, then passes through
Nb item, C, Al, Ti element is added in feeder, and after Nbization is clear, refining 6min is cooled to by GH625 alloy casting into ingot mould
It is demoulded after room temperature, machining removal head and tail portion obtain GH625 alloy electrode ingot；
Step 2, electroslag remelting is carried out using the electroslag furnace with argon atmosphere protective device:
The dummy electrode of GH625 alloy electrode ingot and electroslag furnace that step 1 obtains is welded with argon arc welding, is put after lifting
Entering electroslag furnace, be put into the crystalliser feet of electroslag furnace and open arc plate and 700g slag, is passed through argon gas, the power transmission starting the arc starts melting,
After forming alloy pool in crystallizer, slag is persistently added by feeder, until electrode ingot residue 20mm, stops fusing,
It is cooled to room temperature, obtains GH625 alloy cast ingot；
Wherein, the slag slag system of electroslag remelting is composed of the following components by mass percentage: CaF263%, CaO17%,
Al2O316%, the sum of mass percent of the above component is 100%；
Step 3, the surface slag crust for the GH625 alloy cast ingot that step 2 obtains is cleared up, then machines removal GH625
The oxide skin on alloy cast ingot surface；
Step 4, vacuum consumable weight is carried out using the consumable electrode vacuum furnace for solidifying control forming Melting control system with molten drop
It is molten:
The dummy electrode of the GH625 alloy cast ingot and consumable electrode vacuum furnace that handle through step 3 is welded, then GH625 is closed
Golden ingot casting is fitted into consumable electrode vacuum furnace, is carried out vacuumize process, is terminated when vacuum degree < 1Pa, and the power transmission starting the arc starts melting, is melted
Refining speed is 15Kg/min, opens the intake valve of consumable electrode vacuum furnace, and it is cold that helium progress is passed through into the crystallizer of consumable electrode vacuum furnace
But, the pressure of helium is 30bar, and after fusing, power failure and helium pass through the recirculated water pair in consumable electrode vacuum furnace crystallizer
GH625 alloy cast ingot is cooled to room temperature；
Step 5, homogenization heat treatment
The GH625 alloy cast ingot handled through step 4 is added in heat-treatment furnace at room temperature and is heated, GH625
Alloy cast ingot center portion region heating temperature keeps the temperature 9h to 1100 DEG C；
Step 6, hammer cogging, cogging temperature will be carried out using quick forging machine through step 5 treated GH625 alloy cast ingot
It 1125 DEG C, is cooled to room temperature, obtains semi-finished product GH625 alloy bar material, the surface vehicle light of semi-finished product GH625 alloy bar material is cut
It is cut into tube extrusion materials section, obtains GH625 alloy bar material；
Step 7, the GH625 alloy bar material that step 6 obtains is perforated with hot punching machine and carries out thermal expansion hole, thermal expansion hole
1120 DEG C of temperature, GH625 alloy pipe stock is obtained, then GH625 compo pipe is squeezed under conditions of temperature is 1150 DEG C with extruder
Base obtains GH625 alloy seamless pipe, and GH625 alloy seamless pipe is carried out solid hot melt processing, then the table of mechanical process seamless pipe
Face simultaneously removes defective position, obtains GH625 alloy pipe；
Step 8, using GH625 alloy welding wire, the GH625 alloy pipe that step 8 is obtained using the method for argon arc welding into
Row welding；
Step 9, the GH625 alloy pipe handled using the lossless detection methods such as fluorescence, X-ray or ultrasound detecting step 8
Welding line joint quality flawless welded seam area is subjected to stress relief annealing, specifically: by the weld metal zone of GH625 compo pipe
Domain is put into Rotary Electric Furnace, by the temperature of Rotary Electric Furnace from room temperature to 600 DEG C, after keeping the temperature 10min, with 10 DEG C/min's
Temperature is risen to 900 DEG C from 600 DEG C by speed, keeps the temperature 30min, then temperature is down to room temperature from 900 DEG C with the speed of 10 DEG C/min
After take out；
Step 10, the GH625 alloy pipe handled through step 9 is answered with Portable X-ray residual stress test instrument
Power inspection, weld residual stress value are not higher than 200MPa (lower than the 1/3 of GH625 alloy base metal yield strength).
A kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking of the present invention, using vacuum induction melting,
The smelting technology of electroslag furnace remelting and vacuum consumable remelting, the content for improving alloy degree of purity, reducing harmful element, such as sulphur, phosphorus
Deng the metallurgical quality of improvement GH625 alloy pipe weld seam；Temperature reaches 900 DEG C or more in the destressing heat treatment technique of use,
γ ' ' phase is mainly precipitated in GH625 alloy timeliness at a temperature of 650 DEG C~700 DEG C, and timeliness can be analysed within the scope of 780 DEG C~850 DEG C
δ phase out, and timeliness only has a small amount of precipitated phase under 900 DEG C of high temperature, can guarantee alloy mechanical property not reduces, while high annealing
Enable to weld residual stress release more abundant.
Claims (9)
1. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking, which is characterized in that specifically according to the following steps
Implement:
Step 1, vacuum induction melting
Ni, Cr, Mo in GH625 alloying component is transferred in crucible by barrel, by the working chamber of vaccum sensitive stove and ingot mould
Room carries out vacuumize process, after vacuumizing, carries out melting, is added after Ni, Cr, Mo are completely melting down, then through feeder
Nb item, C, Al, Ti raw material, after Nbization is clear, refining by GH625 alloy casting into ingot mould, is taken off after being cooled to room temperature
Mould, machining removal head and tail portion, obtain GH625 alloy electrode ingot；
Step 2, electroslag remelting is carried out using the electroslag furnace with argon atmosphere protective device
The dummy electrode of GH625 alloy electrode ingot and electroslag furnace that step 1 obtains is welded with argon arc welding, electricity is put into after lifting
Slag hearth is put into the crystalliser feet of electroslag furnace and opens arc plate and a small amount of slag, is passed through argon gas, and the power transmission starting the arc starts melting, is tying
After forming alloy pool in brilliant device, slag is persistently added by feeder, until electrode ingot residue 20mm, stops fusing, it is cooling
To room temperature, GH625 alloy cast ingot is obtained；
Step 3, the surface slag crust for the GH625 alloy cast ingot that step 2 obtains is cleared up, then machines removal GH625 alloy
The oxide skin of ingot casting surface；
Step 4, vacuum consumable remelting
The dummy electrode of the GH625 alloy cast ingot and consumable electrode vacuum furnace that handle through step 3 is welded, then GH625 alloy is cast
Ingot is fitted into consumable electrode vacuum furnace, carries out vacuumize process, after vacuumizing, the power transmission starting the arc starts melting, opens self-consuming furnace
Intake valve is passed through helium into the crystallizer of consumable electrode vacuum furnace and is cooled down, and after fusing, power failure and helium pass through vacuum
Recirculated water in self-consuming furnace crystallizer is cooled to room temperature GH625 alloy cast ingot；
Step 5, homogenization heat treatment
The GH625 alloy cast ingot handled through step 4 is added in heat-treatment furnace at room temperature and is heated；
Step 6, hammer cogging will be carried out using quick forging machine through step 5 treated GH625 alloy cast ingot, 1110 DEG C of cogging temperature
It~1130 DEG C, is cooled to room temperature, obtains semi-finished product GH625 alloy bar material, by the surface vehicle light of semi-finished product GH625 alloy bar material,
It is cut into tube extrusion materials section, obtains GH625 alloy bar material；
Step 7, the GH625 alloy bar material that step 6 obtains is perforated with hot punching machine and carries out thermal expansion hole, thermal expansion hole temperature
1095 DEG C~1125 DEG C, obtain GH625 alloy pipe stock, then squeeze GH625 alloy pipe stock with extruder, obtain GH625 alloy without
GH625 alloy seamless pipe is carried out solid hot melt processing by slit-tube, then mechanical process seamless pipe surface and by defective position
Removal, obtains GH625 alloy pipe；
Step 8, the GH625 alloy pipe that step 8 obtains is welded using argon arc welding；
Step 9, the weldering of the GH625 alloy pipe handled using the lossless detection methods such as fluorescence, X-ray or ultrasound detecting step 8
Joint quality is stitched, by flawless welded seam area, carries out stress relief annealing；
Step 10, the GH625 alloy pipe handled through step 9 is subjected to stress inspection with Portable X-ray residual stress test instrument
It looks into, weld residual stress value is not higher than 200MPa.
2. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking according to claim 1, feature exist
In in the step 1, the vacuum degree < 1Pa of vacuumize process, refining time is 3min~8min.
3. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking according to claim 1, feature exist
In in the step 2, the slag slag system of electroslag remelting is composed of the following components by mass percentage: CaF260~70%,
CaO15~20%, Al2O315~20%, the sum of mass percent of the above component is 100%.
4. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking according to claim 1, feature exist
In in the step 4, consumable electrode vacuum furnace is using molten drop solidification control forming Melting control system, the vacuum of vacuumize process
< 1Pa is spent, speed of melting is 5Kg/min~25Kg/min, and the pressure for being passed through helium is 30bar~50bar.
5. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking according to claim 1, feature exist
In in the step 5, GH625 alloy cast ingot center portion region heating temperature is 1100 DEG C~1120 DEG C, keeps the temperature 5h~10h.
6. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking according to claim 1, feature exist
In, in the step 6,1110 DEG C~1130 DEG C of cogging temperature.
7. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking according to claim 1, feature exist
In, in the step 7, thermal expansion hole temperature is 1095 DEG C~1125 DEG C, heating temperature in extrusion process is 1130 DEG C~
1170℃。
8. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking according to claim 1, feature exist
In welding uses GH625 alloy welding wire in the step 8.
9. a kind of technique for preventing GH625 alloy pipe weld stress corrosion cracking according to claim 1, feature exist
In, in the step 9, the process of stress relief annealing are as follows: the welded seam area of GH625 compo pipe is put into Rotary Electric Furnace, it will
The temperature of Rotary Electric Furnace from room temperature to 580 DEG C~600 DEG C, keep the temperature 10min after, with the speed of 10 DEG C/min by temperature from
580 DEG C~600 DEG C rise to 890 DEG C~930 DEG C, keep the temperature 30min, then with the speed of 10 DEG C/min by temperature from 890 DEG C~930 DEG C
It is cooled to room temperature taking-up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811469384.6A CN109280788B (en) | 2018-11-28 | 2018-11-28 | Process for preventing weld joint stress corrosion cracking of GH625 alloy pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811469384.6A CN109280788B (en) | 2018-11-28 | 2018-11-28 | Process for preventing weld joint stress corrosion cracking of GH625 alloy pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109280788A true CN109280788A (en) | 2019-01-29 |
| CN109280788B CN109280788B (en) | 2020-12-01 |
Family
ID=65174470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811469384.6A Active CN109280788B (en) | 2018-11-28 | 2018-11-28 | Process for preventing weld joint stress corrosion cracking of GH625 alloy pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109280788B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230002A (en) * | 2019-07-30 | 2019-09-13 | 攀钢集团江油长城特殊钢有限公司 | A kind of martensite steel and preparation method thereof |
| CN110396605A (en) * | 2019-07-22 | 2019-11-01 | 中国航发北京航空材料研究院 | A kind of preparation method of wrought superalloy ingot casting |
| CN111394590A (en) * | 2020-04-07 | 2020-07-10 | 中国航发北京航空材料研究院 | Vacuum consumable remelting method for wrought superalloy GH4169 |
| CN111519068A (en) * | 2020-05-06 | 2020-08-11 | 北京钢研高纳科技股份有限公司 | Triple smelting process of difficult-deformation nickel-based high-temperature alloy GH4151 |
| CN112359261A (en) * | 2020-11-10 | 2021-02-12 | 华能国际电力股份有限公司 | Preparation and processing technology of large-caliber thick-wall pipe made of high-aluminum corrosion-resistant high-temperature alloy |
| WO2021174726A1 (en) * | 2020-03-02 | 2021-09-10 | 北京钢研高纳科技股份有限公司 | Nickel-based deformed high-temperature alloy having high aluminum content and preparation method therefor |
| CN113584331A (en) * | 2021-06-30 | 2021-11-02 | 江西恒大高新技术股份有限公司 | Preparation method of aluminum-doped Inconel625 alloy applied to oxygen-containing high-temperature chlorine corrosion environment |
| CN113798445A (en) * | 2021-09-08 | 2021-12-17 | 老河口市宇骏精密机械有限公司 | Manufacturing method of aluminum cylinder of shock absorber |
| CN113969380A (en) * | 2020-07-23 | 2022-01-25 | 宝武特种冶金有限公司 | Manufacturing method of nuclear-grade nickel-based alloy high-performance bar, bar and application |
| CN115896506A (en) * | 2022-11-18 | 2023-04-04 | 陕西宝锐金属有限公司 | Preparation technology of low segregation GH3230 alloy high-quality slab |
| CN117626017A (en) * | 2023-11-21 | 2024-03-01 | 四川远方高新装备零部件股份有限公司 | Method for machining NS3306 plate steel ingot for manufacturing front chamber |
Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1550281A (en) * | 2003-04-30 | 2004-12-01 | ͨ�õ�����˾ | Electron beam welding method providing post-weld heat treatment |
| CN101486134A (en) * | 2008-01-18 | 2009-07-22 | 中国科学院金属研究所 | Welding material special for GH4169 high-temperature alloy pipe material |
| CN102049665A (en) * | 2009-11-06 | 2011-05-11 | 北京有色金属研究总院 | Preparation method of Ni-Cr-Mo corrosion-resistant alloy cylindrical piece |
| CN102229019A (en) * | 2011-04-28 | 2011-11-02 | 中国航空工业集团公司北京航空材料研究院 | Argon arc welding method suitable for TiAl-based alloy material and titanium alloy |
| CN102330035A (en) * | 2011-10-25 | 2012-01-25 | 宝山钢铁股份有限公司 | Heat resistant steel, and heat resistant steel pipe and manufacturing method thereof |
| CN103317305A (en) * | 2013-06-08 | 2013-09-25 | 宝鸡市天瑞有色金属材料有限责任公司 | Process for manufacturing small-bore nickel base alloy seamless square tubes |
| CN103447760A (en) * | 2013-08-12 | 2013-12-18 | 新兴铸管股份有限公司 | Manufacturing method of N08028 seamless alloy steel pipe |
| CN103785706A (en) * | 2014-02-12 | 2014-05-14 | 攀钢集团江油长城特殊钢有限公司 | Manufacturing method of alloy steel section tubes |
| CN103866163A (en) * | 2014-03-14 | 2014-06-18 | 钢铁研究总院 | Nickel-chromium-cobalt-molybdenum heat resisting alloy and pipe manufacturing process thereof |
| CN103898371A (en) * | 2014-02-18 | 2014-07-02 | 上海发电设备成套设计研究院 | Nickel-based high-temperature alloy for 700 DEG C grade ultra-supercritical coal-fired power station and preparation thereof |
| CN104561664A (en) * | 2014-12-09 | 2015-04-29 | 抚顺特殊钢股份有限公司 | Smelting technique of novel nickel-iron-base high-temperature alloy GH4169D |
| CN104924018A (en) * | 2015-07-06 | 2015-09-23 | 山东钢铁股份有限公司 | On-site repairing method for large motor rotor large section cracks |
| CN104975204A (en) * | 2014-04-14 | 2015-10-14 | 新日铁住金株式会社 | Manufacturing method of Ni-base heat-proof alloy welded joint and Ni-base heat-proof alloy welded joint |
| US9175373B2 (en) * | 2011-02-15 | 2015-11-03 | Siemens Energy, Inc. | Inertia friction weld of superalloy with enhanced post weld heat treatment |
| CN105506390A (en) * | 2015-12-30 | 2016-04-20 | 钢铁研究总院 | Zirconium-containing nickel-based superalloy and preparation method thereof |
| CN105750708A (en) * | 2016-04-29 | 2016-07-13 | 东方电气集团东方锅炉股份有限公司 | Welding method for circumferential weld of thick-wall nickel-based alloy header |
| CN105925925A (en) * | 2016-07-15 | 2016-09-07 | 中国科学院上海应用物理研究所 | Post-welded heat treatment method of fused salt corrosion-resistant nickel-based high temperature alloy welded structure part |
| CN106425276A (en) * | 2016-12-01 | 2017-02-22 | 河南中原重型锻压有限公司 | Method of repair welding of 4145H forged piece and repaired 4145H forged piece |
| CN108315599A (en) * | 2018-05-14 | 2018-07-24 | 钢铁研究总院 | A kind of high cobalt nickel base superalloy and preparation method thereof |
| CN108480419A (en) * | 2018-03-29 | 2018-09-04 | 冯满 | A kind of preparation process of high temperature alloy pipe |
| CN108611584A (en) * | 2016-12-12 | 2018-10-02 | 沈阳云美科技有限公司 | A kind of heat treatment process after GH4033 alloy forged pieces welding |
| EP3401050A1 (en) * | 2017-05-11 | 2018-11-14 | United Technologies Corporation | Heat treatment and stress relief for solid-state welded nickel alloys |
-
2018
- 2018-11-28 CN CN201811469384.6A patent/CN109280788B/en active Active
Patent Citations (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1550281A (en) * | 2003-04-30 | 2004-12-01 | ͨ�õ�����˾ | Electron beam welding method providing post-weld heat treatment |
| CN101486134A (en) * | 2008-01-18 | 2009-07-22 | 中国科学院金属研究所 | Welding material special for GH4169 high-temperature alloy pipe material |
| CN102049665A (en) * | 2009-11-06 | 2011-05-11 | 北京有色金属研究总院 | Preparation method of Ni-Cr-Mo corrosion-resistant alloy cylindrical piece |
| US9175373B2 (en) * | 2011-02-15 | 2015-11-03 | Siemens Energy, Inc. | Inertia friction weld of superalloy with enhanced post weld heat treatment |
| CN102229019A (en) * | 2011-04-28 | 2011-11-02 | 中国航空工业集团公司北京航空材料研究院 | Argon arc welding method suitable for TiAl-based alloy material and titanium alloy |
| CN102330035A (en) * | 2011-10-25 | 2012-01-25 | 宝山钢铁股份有限公司 | Heat resistant steel, and heat resistant steel pipe and manufacturing method thereof |
| CN103317305A (en) * | 2013-06-08 | 2013-09-25 | 宝鸡市天瑞有色金属材料有限责任公司 | Process for manufacturing small-bore nickel base alloy seamless square tubes |
| CN103447760A (en) * | 2013-08-12 | 2013-12-18 | 新兴铸管股份有限公司 | Manufacturing method of N08028 seamless alloy steel pipe |
| CN103785706A (en) * | 2014-02-12 | 2014-05-14 | 攀钢集团江油长城特殊钢有限公司 | Manufacturing method of alloy steel section tubes |
| CN103898371A (en) * | 2014-02-18 | 2014-07-02 | 上海发电设备成套设计研究院 | Nickel-based high-temperature alloy for 700 DEG C grade ultra-supercritical coal-fired power station and preparation thereof |
| CN103866163A (en) * | 2014-03-14 | 2014-06-18 | 钢铁研究总院 | Nickel-chromium-cobalt-molybdenum heat resisting alloy and pipe manufacturing process thereof |
| CN104975204A (en) * | 2014-04-14 | 2015-10-14 | 新日铁住金株式会社 | Manufacturing method of Ni-base heat-proof alloy welded joint and Ni-base heat-proof alloy welded joint |
| CN104561664A (en) * | 2014-12-09 | 2015-04-29 | 抚顺特殊钢股份有限公司 | Smelting technique of novel nickel-iron-base high-temperature alloy GH4169D |
| CN104924018A (en) * | 2015-07-06 | 2015-09-23 | 山东钢铁股份有限公司 | On-site repairing method for large motor rotor large section cracks |
| CN105506390A (en) * | 2015-12-30 | 2016-04-20 | 钢铁研究总院 | Zirconium-containing nickel-based superalloy and preparation method thereof |
| CN105750708A (en) * | 2016-04-29 | 2016-07-13 | 东方电气集团东方锅炉股份有限公司 | Welding method for circumferential weld of thick-wall nickel-based alloy header |
| CN105925925A (en) * | 2016-07-15 | 2016-09-07 | 中国科学院上海应用物理研究所 | Post-welded heat treatment method of fused salt corrosion-resistant nickel-based high temperature alloy welded structure part |
| CN106425276A (en) * | 2016-12-01 | 2017-02-22 | 河南中原重型锻压有限公司 | Method of repair welding of 4145H forged piece and repaired 4145H forged piece |
| CN108611584A (en) * | 2016-12-12 | 2018-10-02 | 沈阳云美科技有限公司 | A kind of heat treatment process after GH4033 alloy forged pieces welding |
| EP3401050A1 (en) * | 2017-05-11 | 2018-11-14 | United Technologies Corporation | Heat treatment and stress relief for solid-state welded nickel alloys |
| CN108480419A (en) * | 2018-03-29 | 2018-09-04 | 冯满 | A kind of preparation process of high temperature alloy pipe |
| CN108315599A (en) * | 2018-05-14 | 2018-07-24 | 钢铁研究总院 | A kind of high cobalt nickel base superalloy and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| M. SENNOUR等: "TEM investigations on the effect of chromium content and of stress relief treatment on precipitation in Alloy 82", 《JOURNAL OF NUCLEAR MATERIALS》 * |
| 肖桂华: "浅论 GH625合金焊缝的焊后热处理工艺", 《四川冶金》 * |
| 魏振伟等: "GH536 镍基高温合金焊接组织演变", 《航空材料学报》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110396605A (en) * | 2019-07-22 | 2019-11-01 | 中国航发北京航空材料研究院 | A kind of preparation method of wrought superalloy ingot casting |
| CN110396605B (en) * | 2019-07-22 | 2021-02-09 | 中国航发北京航空材料研究院 | Preparation method of deformed high-temperature alloy ingot |
| CN110230002A (en) * | 2019-07-30 | 2019-09-13 | 攀钢集团江油长城特殊钢有限公司 | A kind of martensite steel and preparation method thereof |
| WO2021174726A1 (en) * | 2020-03-02 | 2021-09-10 | 北京钢研高纳科技股份有限公司 | Nickel-based deformed high-temperature alloy having high aluminum content and preparation method therefor |
| CN111394590A (en) * | 2020-04-07 | 2020-07-10 | 中国航发北京航空材料研究院 | Vacuum consumable remelting method for wrought superalloy GH4169 |
| CN111519068A (en) * | 2020-05-06 | 2020-08-11 | 北京钢研高纳科技股份有限公司 | Triple smelting process of difficult-deformation nickel-based high-temperature alloy GH4151 |
| CN113969380A (en) * | 2020-07-23 | 2022-01-25 | 宝武特种冶金有限公司 | Manufacturing method of nuclear-grade nickel-based alloy high-performance bar, bar and application |
| CN113969380B (en) * | 2020-07-23 | 2022-07-15 | 宝武特种冶金有限公司 | Manufacturing method of nuclear-grade nickel-based alloy high-performance bar, bar and application |
| CN112359261A (en) * | 2020-11-10 | 2021-02-12 | 华能国际电力股份有限公司 | Preparation and processing technology of large-caliber thick-wall pipe made of high-aluminum corrosion-resistant high-temperature alloy |
| CN113584331A (en) * | 2021-06-30 | 2021-11-02 | 江西恒大高新技术股份有限公司 | Preparation method of aluminum-doped Inconel625 alloy applied to oxygen-containing high-temperature chlorine corrosion environment |
| CN113798445A (en) * | 2021-09-08 | 2021-12-17 | 老河口市宇骏精密机械有限公司 | Manufacturing method of aluminum cylinder of shock absorber |
| CN115896506A (en) * | 2022-11-18 | 2023-04-04 | 陕西宝锐金属有限公司 | Preparation technology of low segregation GH3230 alloy high-quality slab |
| CN117626017A (en) * | 2023-11-21 | 2024-03-01 | 四川远方高新装备零部件股份有限公司 | Method for machining NS3306 plate steel ingot for manufacturing front chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109280788B (en) | 2020-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109280788A (en) | A kind of technique preventing GH625 alloy pipe weld stress corrosion cracking | |
| TWI656221B (en) | Alloy smelting and refining method | |
| CA2786719C (en) | Systems and methods for forming and processing alloy ingots | |
| Yang et al. | Defect of functionally graded material of inconel 718 and STS 316L fabricated by directed energy deposition and its effect on mechanical properties | |
| US9309584B2 (en) | Base material for high temperature alloy and manufacture method thereof | |
| CN111519068A (en) | Triple smelting process of difficult-deformation nickel-based high-temperature alloy GH4151 | |
| CN109252084B (en) | Preparation process of high-purity GH825 alloy fine-grain plate | |
| CN106881540A (en) | A kind of nickel-base alloy, wlding | |
| JP6620924B2 (en) | Method for producing Fe-Ni base superalloy | |
| CN112553505A (en) | Nickel-based plate and preparation method thereof | |
| CN112921196B (en) | Preparation method of corrosion-resistant Ti35 titanium alloy ingot | |
| CN108672980B (en) | Short-process preparation method of GH4169 alloy welding wire | |
| JP3606404B2 (en) | Consumable electrode type remelting method of super heat-resistant alloy | |
| RU2395608C1 (en) | Heat resistant alloy | |
| Eremin et al. | Promising method of producing cast billets from superalloys | |
| RU2395606C1 (en) | Heat resistant alloy | |
| Dyrkacz | Vacuum melting in the steel industry today | |
| Sorokin et al. | Weldability of cast creep-resisting nickel alloys of the ZhS6 type | |
| CN113319467B (en) | Nickel-based alloy welding strip for nuclear power | |
| Satya Prasad et al. | Electroslag crucible melting of age hardening copper–chromium alloy | |
| CN112522544B (en) | Grain boundary regulation and control method for improving weldability of cast high-temperature alloy and welding process | |
| CN115109937B (en) | Electroslag remelting method for effectively controlling N08810 aluminum titanium components | |
| AU2014213527B2 (en) | Systems and methods for forming and processing alloy ingots | |
| CN118621183A (en) | Easily segregated high-temperature large ingot alloy, preparation method and application | |
| Innola et al. | Refining and recycling of the nickel based heat-resistant alloy used in aviation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |