CN110181230A - A kind of bimetal metallurgy multiple tube and preparation method thereof - Google Patents
A kind of bimetal metallurgy multiple tube and preparation method thereof Download PDFInfo
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- CN110181230A CN110181230A CN201910452763.2A CN201910452763A CN110181230A CN 110181230 A CN110181230 A CN 110181230A CN 201910452763 A CN201910452763 A CN 201910452763A CN 110181230 A CN110181230 A CN 110181230A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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- 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
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Abstract
The invention discloses a kind of bimetal metallurgy multiple tubes and preparation method thereof, comprising the following steps: the pipe of bimetal metallurgy multiple tube is prepared using vacuum water cooling die casting technology；Wherein, inside and outside layer metal carries out metallurgical bonding by way of High temperature diffusion, and pipe both ends are coated by inner layer metal；The pipe of the bimetal metallurgy multiple tube of acquisition is subjected to hot-roll forming, so that the caliber and wall thickness of bimetal metallurgy multiple tube meet preassigned, so that inner layer metal reaches preset thickness requirement；The bimetal metallurgy multiple tube of hot-roll forming is subjected to homogeneous tube Tempering and Quenching, so that outer layer metal is reached preset strength requirement, completes the preparation of bimetal metallurgy multiple tube.Method of the invention can guarantee the high intensity of tubing string, while can realize inner wall anti-corrosive integrality.
Description
Technical field
The invention belongs to natural petroleum gas field composite oil pipe technical field, in particular to a kind of bimetal metallurgy is compound
Pipe and preparation method thereof.
Background technique
Since harshness corrodes oil gas field Service Environment, tube inner wall homogeneous corrosion and spot corrosion perforation failure frequently occur, have
Corrosion failure just occurs for a little oil pipe even some months.According to the H in environment2S partial pressure, CO2Partial pressure, Cl-Mass concentration, temperature, pressure
Power and liquid mobility status, according to the increasingly stronger sequence of corrosion resistance, available corrosion resistant alloy material has low-carbon alloy steel, horse
Family name's body stainless steel, two phase stainless steel, iron-corrosion resistant alloy and corrosion resistant alloy.Contain on the ground such as NE Sichuan, Tarim Basin for Sichuan
The simultaneous high temperature of H2S, CO2, Cl-, high-pressure natural gas field, at present multiselect martensitic stain less steel pipe (super 13Cr) and resistance to
It loses compo pipe (825, G3), but the failure of super 13Cr oil pipe stress corrosion cracking also repeated；And pure corrosion resistant alloy oil pipe valence
Lattice are very expensive, and cost is too high, it is difficult to promote the use of.
Bimetallic composite oil pipe greatly reduces the cost of anti-corrosion oil pipe, by the high intensity of outer layer carbon steel and the anti-corrosion conjunction of internal layer
The antiseptic property of gold organically combines, i.e. raising performance, and reduces cost.There are mainly two types of combinations for composite bimetal pipe: machine
Tool multiple tube and metallurgical composite pipe.Mechanical composite tube is under underground high temperature and complex load, due to coefficient of expansion difference, Huo Zhefa
When giving birth to internal pressure or squeezing outside, the failure phenomenons such as internal layer corrosion resistant pipe is easy to happen unstability, is bubbled, falls off, collapsing.Metallurgical bonding is answered
The drawbacks described above of mechanical composite tube can be overcome by closing pipe, and since metallurgical composite pipe interface is combined by High temperature diffusion mode, interface is strong
Degree is high, while also solving the problems, such as easy to fall off under conventional painting/coating stress condition.The producer of metallurgy composite bimetal pipe at present
Formula mainly have centre spinning and explosion welding method, and centre spinning there are inside and outside layer metal tubes it is in uneven thickness, eccentric or
The casting flaws such as loose, micro-crack；Explosion welding method is since interface is plastically deformed, and wave crest and trough performance are uneven, and such as
Fruit explosion technology improper the defects of being easy to cause interface solder skip.Meanwhile domestic composite bimetal pipe is chiefly used in ground long distance pipeline,
Tube body is mostly used girth joint connection, and weld joint strength is much smaller than intensity is threadedly coupled, for the oil well pipe of underground, since load is multiple
Miscellaneous, Tensile, compression, bending, internal pressure, the outer load for the diversified forms such as squeezing are high to pipe end bonding strength requirement, general to require to use
It is threadedly coupled, rarely has and refer to for the threaded connection problem of composite bimetal pipe.
To sum up, a kind of bimetal metallurgy multiple tube that can be used for underground is needed.
Summary of the invention
It is compound to solve bimetallic the purpose of the present invention is to provide a kind of bimetal metallurgy multiple tube and preparation method thereof
The boundary strength and oil pipe pipe end of pipe handle problem.The present invention can guarantee the high intensity of tubing string, while can realize that inner wall is anti-
Rotten integrality.
In order to achieve the above objectives, the invention adopts the following technical scheme:
A kind of bimetal metallurgy multiple tube, comprising: inner metallic layer and metal outer；
The metallurgical bonding by way of High temperature diffusion of the inner metallic layer and the metal outer；The bimetal metallurgy is multiple
The both ends for closing pipe are coated by the inner metallic layer；
The material of the inner metallic layer is corrosion resistant alloy, and the material of the metal outer is carbon steel.
A further improvement of the present invention is that the inner metallic layer with a thickness of 1.5mm~2.5mm；The corrosion resistant alloy
For austenitic stainless steel, two phase stainless steel or nickel-base alloy.
A further improvement of the present invention is that the carbon steel is that can meet API Spec 5CT by normalizing or quenched
The carbon steel of standard requirements intensity.
A further improvement of the present invention is that the caliber and wall thickness of the bimetal metallurgy multiple tube meet API Spec
The oil pipe specification of 5CT standard requirements.
A further improvement of the present invention is that, further includes: box cupling；Two bimetal metallurgy multiple tubes can pass through institute
State box cupling connection；
The metal outer at the both ends of the bimetal metallurgy multiple tube is cone structure, and is machined with connection external screw thread；
The material of the box cupling is consistent with the material of the inner metallic layer；
The box cupling is tubulose；The inwall processing at the both ends of the box cupling has connection internal screw thread, passes through spiral shell outside the connection
The box cupling can be mounted on the bimetal metallurgy multiple tube by line and the connection internal screw thread；
Sealing shoulder, the internal diameter of the diameter of the sealing shoulder and the inner metallic layer are machined on the inner wall of the box cupling
Unanimously；After the box cupling is mounted on the bimetal metallurgy multiple tube, the end of the metal metallurgy smelting multiple tube can withstand on institute
It states on the end face of sealing shoulder.
A kind of preparation method of bimetal metallurgy multiple tube, the inner layer metal of bimetal metallurgy multiple tube are corrosion resistant alloy,
Outer layer metal is carbon steel；The following steps are included:
The pipe of bimetal metallurgy multiple tube is prepared using vacuum water cooling die casting technology；Wherein, inside and outside layer metal is logical
The mode for crossing High temperature diffusion carries out metallurgical bonding, and pipe both ends are coated by inner layer metal；
The pipe of the bimetal metallurgy multiple tube of acquisition is subjected to hot-roll forming, so that the caliber of bimetal metallurgy multiple tube
Meet preassigned with wall thickness, so that inner layer metal reaches preset thickness requirement；
The bimetal metallurgy multiple tube of hot-roll forming is subjected to homogeneous tube Tempering and Quenching, outer layer metal is made to reach preset strength
It is required that completing the preparation of bimetal metallurgy multiple tube.
A further improvement of the present invention is that specifically includes the following steps:
(1) by the inner layer metal smelted and outer layer metal, preset water cooled mo(u)ld mold is placed according to default casting sequence
In type, the pipe of bimetal metallurgy multiple tube is obtained, the both ends of the pipe are coated by inner layer metal；
(2) the bimetal metallurgy multiple tube pipe for obtaining step (1) carries out hot-roll forming, and inner metallic layer is made to reach default
Thickness；
(3) the bimetal metallurgy multiple tube that step (2) processing obtains is subjected to homogeneous tube heat treatment, metal outer is made to reach pre-
If intensity, the preparation of bimetal metallurgy multiple tube is completed.
A further improvement of the present invention is that preset water-cooled die casting model structure includes: hollow cylinder in step (1)
Mold, the first metal mandrel and the second metal mandrel；
The internal diameter of hollow cylinder mold is greater than the diameter of the first metal mandrel, and the diameter of the first metal mandrel is greater than the second gold medal
Belong to the diameter of plug；First metal mandrel is used for casting metals outer layer, and the second metal mandrel is used for casting metals internal layer.
A further improvement of the present invention is that water-cooled die casting controls bimetallic by control casting sequence in step (1)
The metallurgical bonding of pipe, while guaranteeing that pipe both ends are coated by inner layer metal；
Casting sequence specifically includes: first the first metal mandrel is packed into one heart in hollow cylinder mold, under vacuum conditions
The liquid inner layer metal for predetermined amount of first casting, for guaranteeing that outer layer metal bottom end is coated by inner layer metal, then predetermined amount of casting
The liquid outer layer metal smelted；The first metal mandrel is taken out after outer layer metal solidification, the second metal mandrel is packed into sky with one heart
In heart formwork for cylindrical columns, the melted liquid inner layer metal of predetermined amount is poured into outer layer metal and the second metal mandrel gap,
Heat preservation is to predetermined time period, so that the sufficiently metallurgical diffusion bond of ectonexine metal；It is cooling to obtain the bimetal metallurgy cast
The pipe of multiple tube.
A further improvement of the present invention is that step (2) specifically includes: by heating of pipe blank to 900 DEG C~1000 DEG C, carrying out
Hot-roll forming is completed in roughing and finish rolling；Rolling temperature is controlled by annular furnace heating temperature.
Compared with prior art, the invention has the following advantages:
Bimetal metallurgy multiple tube of the invention, inner metallic layer are corrosion resistant alloy, and metal outer is carbon steel, and ectonexine uses
Metallurgical bonding has better performance compared to existing stainless steel tube, can reduce cost compared to pure corrosion resistant alloy oil pipe.This
Compound tube end is coated by corrosion resistant alloy in invention, can solve the problems, such as existing pipe end processing.
Further, the material of box cupling is consistent with internal layer corrosion resistant alloy, is machined with sealing in inner wall central part in structure
Shoulder can guarantee the integrality of tubing string internal corrosion.
Bimetal metallurgy compound oil casing pipes prepared by the present invention prepare bimetal metallurgy multiple tube with vacuum water cooling die casting
Tube body guarantees that inside and outside layer metal thickness is uniform, and inside and outside layer metal interface does not stress, and is not plastically deformed, and interface is straight,
Metallurgical bonding interface degree of purity is high, and binding force is strong；Special thread connection structure is devised for the characteristics of bimetal tube, guarantees pipe
The interior anti-corrosion integrality of column.
Preparation method of the invention uses vacuum water cooling die casting technology, and it is pure to be greatly improved liquid metal under vacuum environment
Degree, can reduce surface oxidation；Water compulsory circulative cooling can make liquid metal in mold cavity in without the quiet of external force
State, can cool down rapidly, crystallize, solidifying and ingot, and surface of steel ingot is bright and clean, lumber recovery >=95%, steel ingot dense internal organization, nothing
Loose, segregation, cross section equiaxial crystal ratio >=30%；It may make the thickness of bimetallic pipe billet ectonexine metal uniform, combination interface
It is straight.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of bimetal metallurgy multiple tube of the invention；
Fig. 2 is a kind of flow diagram of the preparation method of bimetal metallurgy multiple tube of the invention；
Fig. 3 is the schematic top plan view of Fig. 2；
Fig. 4 is the bimetal metallurgy multiple tube combination interface micro-organization chart of the embodiment of the present invention；
Fig. 1 is into Fig. 3,1- hollow cylinder mold；The first metal mandrel of 2-；3- metal outer；4- inner metallic layer；5- second
Metal mandrel；6- box cupling.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Referring to Fig. 1, a kind of bimetal metallurgy multiple tube of the invention, comprising: inner metallic layer 4 and metal outer 3；Metal
The metallurgical bonding by way of High temperature diffusion of internal layer 4 and metal outer 3.According to field working conditions corrosion condition, corrosion resistant alloy is chosen
As inner tube, carbon steel oil pipe as defined in API 5CT is as outer tube.Wherein, pipe both ends are coated by inner layer metal.In metal
Layer 4 with a thickness of 1.5mm~2.5mm；Corrosion resistant alloy be austenitic stainless steel 316,316L, duplex stainless steel 2205/2507 or
Nickel-base alloy G3,825,625.The intensity of metal outer 3 meets corresponding tubing and casing intensity specified in API Spec 5CT standard
(such as J55, N80, C90, P110, Q125 etc.), carbon steel is traditional oil annular tube 25Mn2,27MnCr6,29CrMnVNb,
25Mn2V etc. passes through normalizing or the quenched carbon steel for meeting API Spec 5CT standard requirements intensity.
Two bimetal metallurgy multiple tubes of the invention can be connected by box cupling 6；The both ends of bimetal metallurgy multiple tube
The metal outer 3 in portion is cone structure, and is machined with connection external screw thread；The material of box cupling 6 is consistent with the material of inner metallic layer 4；
Box cupling 6 is tubulose；The inwall processing at the both ends of box cupling 6 has connection internal screw thread, can by connection external screw thread and connection internal screw thread
Box cupling 6 is mounted on bimetal metallurgy multiple tube；Be machined with sealing shoulder on the inner wall of box cupling 6, the diameter of sealing shoulder with
The internal diameter of inner metallic layer 4 is consistent；After box cupling 6 is mounted on bimetal metallurgy multiple tube, the end of metal metallurgy smelting multiple tube can be pushed up
On the end face of sealing shoulder.
Please refer to Fig. 2 and Fig. 3, a kind of preparation method of bimetal metallurgy multiple tube of the invention, comprising the following steps: needle
To the requirement of bimetal metallurgy multiple tube pipe wall thickness, the water-cooled metal model of ectonexine metal tube is processed, first casting outer wall
Metal tube, after outer tube solidification in certain temperature, then inner layer metal pipe of casting, bimetal metallurgy multiple tube water-cooled metal model
Structure and pipe structure are shown in Fig. 1, it is characterized in that pipe both ends are coated by inner layer metal.It is compound to the bimetal metallurgy after solidification
Pipe carries out hot-roll forming, and pipe is again heated to 900 DEG C~1200 DEG C, carries out twice roughing finish rolling with together with, rolling temperature
Degree is controlled by annular furnace heating temperature, and oil pipe sizing is finishing stands.In order to guarantee the intensity of carbon steel, to the oil after hot rolling
Pipe hollow forging will carry out Tempering and Quenching.
In the present invention, the metallurgical composite pipe base manufacture of corrosion resistant alloy and carbon steel uses vacuum water cooling die casting technology, vacuum water
Cold die casting technology compares conventional casting methods, has the advantage that and is greatly improved Molten Steel Cleanliness under 1) vacuum environment, reduces table
Face oxidation；2) water compulsory circulative cooling keeps molten steel intracavitary in the static state without external force in die body type, cool down rapidly, crystallize,
Solidification, ingot, surface of steel ingot is bright and clean, lumber recovery >=95%, steel ingot dense internal organization, no loose, segregation, cross section equiax crystal
Rate >=30%；3) thickness of bimetallic pipe billet ectonexine metal is uniform, and combination interface is straight.Water-cooled die casting metallurgy of the invention is multiple
Close pipe, ectonexine metal begun to when liquid more than 1200 is spent carry out metallurgy it is compound, interface diffusion layer is sufficiently spread, and is greatly improved
Boundary strength can overcome the defect of mechanical complex method.
The specific implementation step of the above-mentioned preparation method of the present invention is as follows:
S1, process water-cooled die casting metal pattern: the model includes that an internal diameter is equal to the hollow of bimetallic pipe billet outer diameter
Cylindrical metal mold 1, the metal mandrel of two different-diameters, the outer diameter of the first metal mandrel 2 are outer layer carbon steel bore,
The outer diameter of second metal mandrel 5 is internal layer corrosion resistant alloy internal diameter；
S2 smelts: carbon steel molten steel uses electric arc furnace smelting and external refining, and corrosion resistant alloy is smelted can be according to alloy content spy
Point takes suitable smelting process, requires to be smelted according to carbon steel and corrosion resistant alloy chemical component；
Vacuum water-cooled die casting casting sequence: major diameter plug is first packed into hollow cylinder mould, in vacuum by S3 with one heart
It first casts under environment a certain amount of liquid corrosion resistant alloy, guarantees that outer layer carbon steel pipe bottom end is coated by corrosion resistant alloy, then smelting of casting
Good outer layer carbon steel molten steel solidifies after a certain period of time at a certain temperature in carbon steel molten steel, takes out major diameter plug, be put into one heart
Minor diameter plug, pours into melted liquid corrosion resistant alloy in outer layer carbon steel and minor diameter plug gap, held for some time,
After guaranteeing the sufficiently metallurgical diffusion bond of ectonexine metal, furnace cooling obtains the bimetal tube blank structure cast；
S4, hot-roll forming: being again heated to 900 DEG C~1000 DEG C for pipe, carries out twice roughing finish rolling with together with, rolling
Temperature is controlled by annular furnace heating temperature.Oil pipe sizing is finishing stands, guarantees that oil pipe outer diameter and total wall thickness meet API
5CT requirement, while meeting internal layer and pipe end corrosion-resistant alloy layer thickness；
Homogeneous tube heat treatment: S5 carries out modifier treatment to the bimetal tube after rolling, guarantees the intensity of carbon steel；
S6, pipe thread processing, thread measurement；
S7 processes box cupling 6, and 6 material of box cupling is identical as bimetal tube internal layer corrosion resistant alloy, and 6 center of box cupling is machined with sealing
Shoulder；
S8, upper box cupling 6, latus rectum；
S9 carries out hydrostatic test；
S10 is weighed, surveys long, spray mark, is applied thread compound and spray painting, completion composite oil pipe preparation.
The present invention provides a kind of preparation method of vacuum water-cooled die casting metallurgical composite bimetal oil pipe, wherein outer tube is to pass
System Hi-grade steel carbon steel oil pipe, inner tube are the bimetal metallurgy multiple tube of corrosion resistant alloy material.In the present invention, by molding and controlling
Casting sequentially realizes ectonexine metal uniform wall thickness, and tube blank inner wall and both ends are coated by corrosion resistant alloy, and ectonexine metal
By metallurgical diffusion bond, guarantee boundary strength.The internal diameter and wall thickness of bimetal metallurgy multiple tube are controlled by hot-roll forming, together
When guarantee internal layer corrosion-resistant alloy layer thickness meet requirement for anticorrosion.Box cupling material is identical as internal layer corrosion resistant alloy, box cupling central part
Dividing has sealing shoulder structure, guarantees the integrality of tubing string inner wall anti-corrosive.
Embodiment:
A kind of compound control of Φ 139.7mm × 9.17mm nickel-base alloy 625/P110 bimetal metallurgy of the embodiment of the present invention
Preparation Method, the specific steps are as follows:
S1, process water-cooled die casting metal pattern: the model includes that an internal diameter is equal to the hollow of bimetallic pipe billet outer diameter
Cylinder type metal mold, the metal mandrel of two different-diameters.
S2 smelts: according to P110 carbon steel and the requirement of 825 chemical component of nickel-base alloy, taking electric arc furnace smelting and the outer essence of furnace
The method of refining respectively smelts two kinds of metals.
Water-cooled die casting casting sequence: the metal mandrel of major diameter is first packed into hollow cylinder mould, true by S3 with one heart
It first casts under Altitude a certain amount of liquid nickel-base alloy 825, guarantees that outer layer carbon steel pipe bottom end is coated by corrosion resistant alloy, then cast
The P110 carbon steel molten steel smelted takes out the metal mandrel of major diameter, is put into one heart 800 DEG C or so after carbon steel molten steel solidification
The metal mandrel of minor diameter pours into 825 melted nickel-base alloys in outer layer carbon steel and minor diameter metal mandrel gap, to gold
After belonging to quickly solidification, the bimetal tube blank structure cast is obtained.
S4, hot-roll forming: being again heated to 900 DEG C~1000 DEG C for pipe, carries out twice roughing finish rolling with together with, rolling
Temperature is controlled by annular furnace heating temperature.Oil pipe sizing is finishing stands, guarantees that oil pipe outer diameter is Φ 139.7mm and general wall
Thickness is that 9.17mm meets API 5CT requirement, while meeting 304 stainless steel layers with a thickness of 2mm.
S5, homogeneous tube heat treatment: the bimetallic composite oil pipe heat treatment process of roll forming are as follows: be heated to 870 DEG C, heat preservation
60min, water cooling, high tempering temperature are 650 DEG C, keep the temperature 120min, are air-cooled to room temperature.
S5, pipe thread process API 5B long round thread, thread measurement.
S6 processes box cupling, and box cupling material is identical as bimetal tube internal layer corrosion resistant alloy, and box cupling center is machined with sealing station
Shoulder.
S7, upper box cupling, latus rectum.
S8 carries out hydrostatic test: according to outer layer carbon steel oil pipe intensity, being required according to API Spec 5CT, in oil pipe
The water of certain pressure is injected, is kept for a period of time, detects tubing seal and anti-internal pressure performance.
S9 is weighed, is surveyed long, spray mark, applies thread compound, spray painting.
Referring to Fig. 4, Fig. 4 is nickel-base alloy 825/P110 bimetal metallurgy multiple tube interface microstructure, through above-mentioned side
Φ 139.7mm × 9.17mm nickel-base alloy 825/P110 bimetal metallurgy multiple tube of method preparation, tensile strength 958MPa, surrender
Intensity 850MPa, elongation after fracture 28%, interface shearing-resistance shearing stress are 456MPa.825 layers of internal layer nickel-base alloy with a thickness of the left side 2mm
The right side, ectonexine metal metallurgy smelting combination thickness of diffusion layer are 50 μm, and interface diffusion layer microstructure is as shown in Figure 4.It can be seen that the oil pipe
Not only the intensity requirement of P110 oil pipe had been met, but also the interior antiseptic property of nickel-base alloy is utilized.
The above description is merely a specific embodiment, but application range of the invention is not limited thereto, any
Belong to those skilled in the art in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, all answers
Cover within application range of the invention.Therefore, application range of the invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of bimetal metallurgy multiple tube characterized by comprising inner metallic layer (4) and metal outer (3)；
The inner metallic layer (4) and the metal outer (3) metallurgical bonding by way of High temperature diffusion；The bimetal metallurgy
The both ends of multiple tube are coated by the inner metallic layer (4)；
The material of the inner metallic layer (4) is corrosion resistant alloy, and the material of the metal outer (3) is carbon steel.
2. a kind of bimetal metallurgy multiple tube according to claim 1, which is characterized in that the thickness of the inner metallic layer (4)
Degree is 1.5mm~2.5mm；The corrosion resistant alloy is austenitic stainless steel, two phase stainless steel or nickel-base alloy.
3. a kind of bimetal metallurgy multiple tube according to claim 1, which is characterized in that the carbon steel be by normalizing or
Person is quenched, can meet the carbon steel of API Spec5CT standard requirements intensity.
4. a kind of bimetal metallurgy multiple tube according to claim 1, which is characterized in that the bimetal metallurgy multiple tube
Caliber and wall thickness meet the oil pipe specifications of API Spec5CT standard requirements.
5. a kind of bimetal metallurgy multiple tube according to any one of claim 1 to 4, which is characterized in that further include: it connects
It binds round (6)；Two bimetal metallurgy multiple tubes can be connected by the box cupling (6)；
The metal outer (3) at the both ends of the bimetal metallurgy multiple tube is cone structure, and is machined with connection external screw thread；
The material of the box cupling (6) is consistent with the material of the inner metallic layer (4)；
The box cupling (6) is tubulose；The inwall processing at the both ends of the box cupling (6) has connection internal screw thread, by the connection outside
The box cupling (6) can be mounted on the bimetal metallurgy multiple tube by screw thread and the connection internal screw thread；
Sealing shoulder is machined on the inner wall of the box cupling (6), the diameter of the sealing shoulder is interior with the inner metallic layer (4)
Diameter is consistent；After the box cupling (6) is mounted on the bimetal metallurgy multiple tube, the end of the metal metallurgy smelting multiple tube can be pushed up
On the end face of the sealing shoulder.
6. a kind of preparation method of bimetal metallurgy multiple tube, which is characterized in that the inner layer metal of bimetal metallurgy multiple tube is
Corrosion resistant alloy, outer layer metal are carbon steel；The following steps are included:
The pipe of bimetal metallurgy multiple tube is prepared using vacuum water cooling die casting technology；Wherein, inside and outside layer metal passes through height
The mode of temperature diffusion carries out metallurgical bonding, and pipe both ends are coated by inner layer metal；
The pipe of the bimetal metallurgy multiple tube of acquisition is subjected to hot-roll forming, so that the caliber and wall of bimetal metallurgy multiple tube
Thickness meets preassigned, so that inner layer metal reaches preset thickness requirement；
The bimetal metallurgy multiple tube of hot-roll forming is subjected to homogeneous tube Tempering and Quenching, so that outer layer metal is reached preset strength and wants
It asks, completes the preparation of bimetal metallurgy multiple tube.
7. a kind of preparation method of bimetal metallurgy multiple tube according to claim 6, which is characterized in that specifically include with
Lower step:
(1) it by the inner layer metal smelted and outer layer metal, is placed in preset water-cooled die casting model according to default casting sequence,
The pipe of bimetal metallurgy multiple tube is obtained, the both ends of the pipe are coated by inner layer metal；
(2) the bimetal metallurgy multiple tube pipe for obtaining step (1) carries out hot-roll forming, and inner metallic layer (4) is made to reach default
Thickness；
(3) the bimetal metallurgy multiple tube that step (2) processing obtains is subjected to homogeneous tube heat treatment, metal outer (3) is made to reach pre-
If intensity, the preparation of bimetal metallurgy multiple tube is completed.
8. a kind of preparation method of bimetal metallurgy multiple tube according to claim 7, which is characterized in that in step (1),
Preset water-cooled die casting model structure includes: hollow cylinder mold (1), the first metal mandrel (2) and the second metal mandrel (5)；
The internal diameter of hollow cylinder mold (1) is greater than the diameter of the first metal mandrel (2), and the diameter of the first metal mandrel (2) is greater than
The diameter of second metal mandrel (5)；First metal mandrel (2) is used for casting metals outer layer (3), and the second metal mandrel (5) is used for
Casting metals internal layer (4).
9. a kind of preparation method of bimetal metallurgy multiple tube according to claim 7, which is characterized in that in step (1),
Water-cooled die casting controls the metallurgical bonding of bimetallic pipe billet by control casting sequence, while guaranteeing pipe both ends by inner layer metal
Cladding；
Casting sequence specifically includes: being first packed into the first metal mandrel (2) in hollow cylinder mold (1) with one heart, in vacuum environment
The liquid inner layer metal of lower predetermined amount of first casting, for guaranteeing that outer layer metal bottom end is coated by inner layer metal, then predetermined amount of casting
The liquid outer layer metal smelted；The first metal mandrel (2) are taken out after outer layer metal solidification, the second metal mandrel (5) is same
The heart is packed into hollow cylinder mold (1), pours into the melted of predetermined amount in outer layer metal and the second metal mandrel (5) gap
Liquid inner layer metal, heat preservation to predetermined time period, so that the sufficiently metallurgical diffusion bond of ectonexine metal；Cooling obtain is cast
Bimetal metallurgy multiple tube pipe.
10. a kind of preparation method of bimetal metallurgy multiple tube according to claim 7, which is characterized in that step (2) tool
Body includes: by heating of pipe blank to 900 DEG C~1000 DEG C, carries out roughing and finish rolling, completes hot-roll forming；Rolling temperature is by annular
Stove heating temperature controls.
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| CN111872385A (en) * | 2020-06-30 | 2020-11-03 | 中国石油天然气集团有限公司 | Local additive manufacturing method for threaded joint of bimetal composite oil well pipe |
| CN111889987A (en) * | 2020-08-17 | 2020-11-06 | 福润得复合新材料有限公司 | Production process of bimetal composite anticorrosive steel pipe |
| CN112496076A (en) * | 2020-10-30 | 2021-03-16 | 太原理工大学 | Rolling method of inner corrugated metal composite pipe |
| CN112496077A (en) * | 2020-10-30 | 2021-03-16 | 太原理工大学 | Metal composite pipe continuous rolling forming method for transverse and longitudinal crossed inner corrugated joint surface |
| CN113059020A (en) * | 2021-04-01 | 2021-07-02 | 青岛力晨新材料科技有限公司 | Bimetal composite pipe and preparation method thereof |
| CN113182784A (en) * | 2021-05-15 | 2021-07-30 | 西北工业大学 | Method for manufacturing titanium alloy/stainless steel inner and outer sleeve composite component |
| CN113426976A (en) * | 2021-04-10 | 2021-09-24 | 桂林理工大学 | Crack control method for bimetal composite pipe |
| CN115287433A (en) * | 2022-10-08 | 2022-11-04 | 太原科技大学 | Online solid solution device and method for bimetal composite pipe |
| CN116329317A (en) * | 2023-05-11 | 2023-06-27 | 太原科技大学 | Bimetal composite seamless pipe and rolling process flow |
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| CN115287433A (en) * | 2022-10-08 | 2022-11-04 | 太原科技大学 | Online solid solution device and method for bimetal composite pipe |
| CN116329317A (en) * | 2023-05-11 | 2023-06-27 | 太原科技大学 | Bimetal composite seamless pipe and rolling process flow |
| CN116329317B (en) * | 2023-05-11 | 2023-07-21 | 太原科技大学 | Bimetal composite seamless pipe and rolling process |
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