CN105665669B - The preparation facilities and method of a kind of aluminium alloy compound pipe - Google Patents
The preparation facilities and method of a kind of aluminium alloy compound pipe Download PDFInfo
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- CN105665669B CN105665669B CN201610206273.0A CN201610206273A CN105665669B CN 105665669 B CN105665669 B CN 105665669B CN 201610206273 A CN201610206273 A CN 201610206273A CN 105665669 B CN105665669 B CN 105665669B
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/14—Plants for continuous casting
- B22D11/141—Plants for continuous casting for vertical casting
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Abstract
The preparation facilities and method of a kind of aluminium alloy compound pipe, belong to technical field of metal material preparation.Device includes：Outer crystallizer, interior crystallizer, core, support, dummy ingot and casting machine；Preparation method：1) when hydraulic pressure and oil pressure in outer crystallizer, interior crystallizer and core is stablized, core melt is made to flow into inner chamber；2) when outer layer formation core solidified shell, composite bed melt is made to flow into exocoel by outer crystallizer shunting disk；Start casting machine；3) composite bed melt and core solidified shell formation compound interface, are made composite pipe blank；When composite pipe blank reaches predetermined length, stop for stream.The preparation facilities and method of the present invention, the problem of solving the circumferential temperature distributing disproportionation in interface and be excessive and deficient compound, eliminate segregation, segregation phenomenon, reduce the frictional force between core solidified shell and core, realize direct combination cast form, present device is simple, short route, energy consumption are low, production efficiency is high.
Description
Technical field
The invention belongs to technical field of metal material preparation, the preparation facilities of more particularly to a kind of aluminium alloy compound pipe and
Method.
Background technology
Aluminium alloy compound tubing is a kind of laminar composite of two or more aluminium alloy compounds, due to that can fill
The characteristics of each constituent element of multiple tube is waved in distribution, so composite can realize the combination of multiple performance, such as high-strength wearable, high-strength resistance to
Erosion, it is high-strength can soldering, high-strength highly-conductive, it is anti-corrosion can soldering etc..So the application amount of aluminium alloy compound tubing is dramatically increased.Use extensively
In automobile, ship, machinery, petrochemical industry, power electronics and space flight, aircraft industry.
The production method of traditional aluminium alloy compound tubing is extrusion cladding method, and this method is the pipe that will be squeezed into, table
After the processing of face, it is set to together, is extruded after heating, using high temperature when extruding, high pressure, by two or more aluminium alloy compound into again
Close tubing.The problem of this method is that compound working procedure is long, and often there is stomata at the interface of multiple tube and is mingled with, and compound interface is uneven
Directly.So uneconomical.
In addition, also someone outside bend tension cladding material to core aluminium-alloy pipe, then uses table material aluminum alloy strip
Table material is welded into pipe, the composite pipe of this method production, because table material and core do not have metallurgical binding, so not by ratio-frequency welding
It is real composite pipe, simply coats tubing.
The production method of modern composite pipe is all first to cast composite pipe blank, then extrudes or be rolled into composite pipe.
The method that production prepares bimetal clad pipe blank mainly has：Centrifugation technique method, evaporative pattern vacuum suction casting technique and plasticity
Forming process etc..Centre spinning is that the metal liquid that first will act as base tube is put into the metal pattern of rotation, it is caused by rotation
Centrifugal force field, condense turn into base tube, until temperature drop is to a certain degree, addition internal lining pipe metal liquid, with same
Principle formation internal lining pipe.Due to its forming principle, it is compound less than outer layer metal fusing point that it is only applicable to inner liner metal fusing point
The shaping of pipe, and this method low production efficiency, cost are high.Evaporative pattern vacuum suction casting technique is substantially sand casting, by one kind
Tubing is put into sand mold together as outer tube, foamed material as the mold of lining pipe, pours into another material substitution foam, this
Although kind of a method can do the bimetallic tubing of special shape, complex procedures, labor intensity are high, it is difficult to realize industrial metaplasia
Production.The combination for the composite pipe that plastic process is obtained is mechanical bond, it is difficult to ensure interface quality and bond strength.
Patent 200610112817 (patent document 1) propose a kind of composite horizontal casting straight forming equipment and
Technique, its technique is：Composite-layer metal is flowed through after composite-layer metal incubation cavity by composite-layer metal temperature control crucible heat insulation, injection
Composite-layer metal pipe is frozen into the casting mold formed by composite-layer metal crystallizer and core metal liquid gate spool；Core metal exists
Solidified in the composite-layer metal pipe solidified, and composite ingot is formed with composite-layer metal pipe；Composite ingot passes through secondary cooling
Continuously drawn, reached by saw cutting device that its is sawed-off after certain length by haulage gear after device cooling.Although this method
Have the advantages that equipment is simple, short route, energy-conservation relative to conventional method, but there is also clearly disadvantageous part, such as this method
It is only suitable for producing the composite ingot that outer layer metal fusing point is higher than inner layer metal, it is on the contrary then can not be applicable；After the outflow of inner layer metal liquid
Also need plus attemperator, consume mass energy；And this method can only produce composite bar, if after production composite pipe is also needed
Continue a series of processing, which adds process and cost.
Patent 201010587350 (patent document 2) proposes the casting device and casting method of a kind of composite pipe blank, this
Method technical process and equipment are all fairly simple, it is easy to accomplish large-scale continuous production, reduce the production cost of composite pipe blank.
But this method outer sphere molten metal in casting process will by inner layer metal liquid reheating so that composite-layer metal and core
Temperature during portion's metal composite is difficult to control to, and easily causes internal layer and the excessive of outer layer metal is combined, or even mixed flow.Meanwhile,
The cooled and solidified of inner layer metal liquid wants dispersed heat mainly by the transmission of outer layer metal in casting process, in practical operation
It is difficult to control the intensity of cooling, the excessively compound of ectonexine metal is easily caused.
Patent 201210021134 (patent document 3) proposes the preparation method and device of a kind of bimetallic plied timber,
This method equipment is simple, short route, energy consumption are low, production efficiency is high, and can prevent the excessively compound of ectonexine.But the party
Method is there is also clearly disadvantageous, and the device first in this method has two sets of independent cooling devices, and the cooling of inner layer metal
It is difficult to reach perfect condition, cooling deficiency easily makes inner layer metal pour fashionable remelting, or even burn through, undercooling in outer layer metal
When, then to pour fashionable interface temperature too low and it is ftractureed in later stage cooling procedure for outer layer metal；Secondly, device structure compared with
For complexity, it is unfavorable for realizing large-scale production.
Patent 201010587350 (patent document 2) is answered with the preparation that patent 201210021134 (patent document 3) is related to
The method of layer pipe belongs to horizontal continuous-casting method, due to the feature of horizontal continuous-casting method, both is being prepared clad pipe
There is the relatively big limitation in terms of alloy species, tube blank size during base.First, when in outer sphere molten metal is poured onto and solidified
During layer metal tube surface, the interface at cast gate above is easily destroyed because of washing away for outer sphere molten metal, or even whole interior
Layer pipe is fused.And away from below cast gate, can so make outer layer gold because cooling effect and inevitable heat scatter and disappear
Category liquid also underfill exocoel when just solidified, the particularly wider alloy of two-phase section, completely solidification when mobility become
Obtain very poor or lose flowability substantially.Secondly as Action of Gravity Field, this method is easy to produce component segregation, especially for
Large-sized composite pipe blank.In addition, the cooling device intensity of cooling of device is smaller in both approaches, for hypereutectic alloy very
Easily cause segregation and the segregation of primary phase.
Subject matter present in production composite pipe blank DC casting process is that core and the circumferential melt flow of table material are not
, cause circumferential temperature distributing disproportionation, make tubing compound interface not straight, or cause core to burn, casting process failure；Its
Secondary is to embrace core and bleedout in compound inside pipe wall.It is rapid after its inner surface contact secondary cooling water when composite ingot is extracted crystallizer
Solidification shrinkage, or tightly embracing core, prevents ingot casting from being drawn out crystallizer, otherwise ingot casting inner surface formation solidified shell with
Core produces larger frictional force and is pulled off.The former prevents casting process from proceeding, and the problem occurs mainly in solidification
Shrink larger alloy (such as 2XXX systems, 7XXX line aluminium alloys)；The latter can cause the aluminium liquid in interior crystallizer molten bath to be revealed, this
Problem mostly occurs at the less alloy of solidification shrinkage (such as alusil alloy).The two major issues are all due to that core alloy coagulates
Gu contraction causes to generate larger frictional force between ingot casting and core.
The content of the invention
The problem of existing for prior art, the invention provides a kind of preparation facilities of aluminium alloy compound pipe and side
Method, the device use ring-type multithread shunting disk, table material aluminium alloy with air exclusion under conditions of, contact core solidified shell, and
Core without secondary cooling water, successfully solves the problem of prior art is present, and this method is a kind of production alloy composite pipe material DC castings
Method is made, process is few, productivity ratio is high, can obtain the composite pipe blank of high metallurgical quality.
The preparation facilities of the aluminium alloy compound pipe of the present invention, including outer crystallizer, interior crystallizer, core, support, dummy ingot
And casting machine；Wherein interior crystallizer is located on the inside of outer crystallizer, directly over outer crystallizer and with one heart；Core is same with interior crystallizer
The heart, and pass through the center of interior crystallizer and outer crystallizer；Support fixation is on outer crystallizer water cavity, and dummy ingot is arranged under core
Portion, dummy ingot is connected with casting machine；
Described outer crystallizer, including outer crystallizer graphite annulus inner sleeve, water cooling aluminium set, water cavity and outer crystallizer heat top, water
Cold aluminium set is arranged on water cavity, and outer crystallizer graphite annulus inner sleeve is embedded in water cooling aluminium set, and water cooling aluminium set inwall lower end is provided with
It is in 45 ° and 60 ° of two groups of cooling hydrophthalmias with vertical direction, outer crystallizer heat top is fixed on water cooling aluminium set and outer crystallizer graphite annulus
Above inner sleeve, it is made up of outer crystallizer liquid reserve tank and outer crystallizer shunting disk；
Described interior crystallizer, including interior crystallizer graphite annulus inner sleeve, water cooling copper sleeve and interior crystallizer heat top, interior crystallizer
Graphite annulus inner sleeve is embedded in water cooling copper sleeve, and interior crystallizer heat top is in back taper, is fixed in interior crystallizer, interior crystallizer graphite
Put, be made up of interior crystallizer liquid reserve tank and interior crystallizer shunting disk in ring；
Described core, including cooling system, lubricating system and core heat top；Cooling system include oral siphon, outlet pipe,
Adapter, core water cavity, water channel and water cooling copper film, wherein, oral siphon connects core water cavity through water cooling copper film, and core water cavity leads to
The logical adapter of sluice connection, adapter connection outlet pipe；Lubricating system is included into oil pipe, oil pocket, oil cap and oilhole, wherein,
Enter oil pipe and be connected on oil pocket, oil pocket to be provided with oil cap, oilhole is provided with oil pocket；Oil pocket of the core heat top positioned at lubricating system
Top is simultaneously in contact with it；
Described support, is connected with outer crystallizer, interior crystallizer and core, for support outer crystallizer, interior crystallizer and
Core；
Described dummy bar head, it is trapezoidal, constitute exocoel, the graphite annulus with interior crystallizer with the graphite annulus inner sleeve of outer crystallizer
Inner sleeve constitutes inner chamber.
Wherein：
Described outer crystallizer shunting disk includes 3 layers of flow dividing structure, and outermost layer is provided with 1 flow inlet, and secondary outer layer is set
There are 2~3 diffluence pass, internal layer is provided with 4~6 diffluence pass；Diffluence pass is provided with block；Outer crystallizer shunting disk is provided with
Lead to the tap hole of outer crystallizer graphite annulus inner sleeve；
Described interior crystallizer shunting disk includes 3 layers of flow dividing structure, and outermost layer is provided with 1 flow inlet, and secondary outer layer is set
There are 2~3 diffluence pass, internal layer is provided with 4~6 diffluence pass；Diffluence pass is provided with block；Interior crystallizer shunting disk is provided with
Lead to the tap hole of interior crystallizer graphite annulus inner sleeve；
Described outer crystallizer liquid reserve tank and interior crystallizer liquid reserve tank are made up of insulation material；
Described core heat top is made up of insulation material.
Using the preparation facilities of above-mentioned aluminium alloy compound pipe, the method for preparing aluminium alloy compound pipe is that core is closed
Golden liquid is flowed into through table material heat top shunting disk, is contacted with interior crystallizer inner surface, is formed thin solidified shell.Table material aluminium alloy is through interior crystallization
The bottom of device is flowed into, and is contacted with core solidified shell, is soaked, part melt back, under the secondary cooling water cooling of outer crystallizer, solidification, shape
Into composite pipe.This arrangement can ensure the solidified shell of core formation not with air contact, it is to avoid oxidation and gas
Entrain into, it is ensured that compound interface pore-free and oxide are mingled with, so as to ensure that the metallurgical binding of compound interface.
Specifically include following steps：
Step 1：
(1) by outer crystallizer, interior crystallizer and core water flowing, the logical oil of core；Core melt is injected into interior crystallizer liquid storage
Case；Composite bed melt is injected into outer crystallizer liquid reserve tank；
(2) when hydraulic pressure and stable oil pressure, make core melt by interior crystallizer shunting disk, flow into inner chamber；
Step 2：
(1) when core melt, under the cooling of interior crystallizer graphite inner sleeve, core water cooling copper sleeve and dummy bar head, outer layer shape
During into core solidified shell, outer crystallizer liquid reserve tank is opened, composite bed melt flows into exocoel by outer crystallizer shunting disk；
(2) when composite bed melt is contacted with dummy bar head, casting machine is started；
Step 3：Composite casting：
(1) composite bed melt is contacted with core solidified shell, forms the compound interface with metallurgical binding, and aluminium alloy is made and answers
Close pipe；
(2) when aluminium alloy compound pipe reaches predetermined length, stop for stream.
Wherein：
In described step 1 (2), melt pours into a mould multiply mode by interior crystallizer shunting disk using same level；Core melts
When the heat that body enters back taper by runner is pushed up, melt circumferentially enters equably inner chamber after being blocked by block；
In described step 2 (1), composite bed melt pours into a mould multiply mode by outer crystallizer shunting disk using same level；
Composite bed melt enters axially into exocoel by outer crystallizer shunting disk after being split hole shunting；
In described step 3, when composite bed melt with the core solidified shell in high temperature by contacting, pass through alloying element
Counterdiffusion formed with metallurgical binding interface；
The method of described preparation aluminium alloy compound pipe, composite casting technology condition is：710~760 DEG C of pouring temperature,
50~200mm/min of casting speed, 60~200L/minm of outer crystallizer cooling water inflow, interior crystallizer cooling water inflow 10~
30L/minm, core 30~80L/minm of cooling water inflow, 5~20ml/min of core oil mass；Every process conditions it is specific
Numerical value can be determined according to the different-alloy of various sizes of alloy composite pipe base.
The preparation facilities and method of the aluminium alloy compound pipe of the present invention, solve the circumferential temperature distributing disproportionation in interface and excessive
And the problem of owe compound, eliminate segregation, segregation phenomenon, reduce the frictional force between core solidified shell and core, realize multiple tube
The direct combination cast form of base, proposes that a kind of simple equipment, short route, energy consumption be low, production efficiency is high, makes two kinds of aluminium alloy realities
The device and method of the composite pipe blank of existing metallurgical binding.Compared with current technology, the features of the present invention and its advantage are：
(1) composite casting is carried out using apparatus of the present invention and method, two kinds of metals can be made to be in liquid, directly obtained
The processes such as composite pipe blank is extruded again, drawing, compared with the technique of traditional mode of production composite pipe blank, are not only improved in interface shape
Into metallurgical diffusion layer, the bond strength at interface is improved, process is greatly reduced, improves production efficiency.
(2) when carrying out composite casting, the construction on heat top makes two kinds of metal baths realize same level in inside and outside crystallizer
Shunting, melt flows are more stablized, and substantially eliminate melt flows and the temperature fluctuation produced, interface sustained height week are impacted to interface
It is more uniform to temperature；The contact position of composite bed melt and core solidified shell exists without air, and core solidified shell is from interior crystallization
Device will not be oxidized when extracting, it is to avoid interface produces oxidation, is mingled with, and help to obtain clean interfaces, metallurgical binding good
Composite pipe blank.
(3) the copper sheathing outer wall of core is designed with taper, and up big and down small structure, and lubricating system makes copper mold quilt
Oily continuous lubrication, effectively reduces the frictional force between core solidified shell and core, prevents from embracing core with drawing in casting process
Leak phenomenon.
(4) it is 30~60mm by controlling composite bed melt and the contact height of core solidified shell, makes two kinds of interface aluminium
Effective diffusion occurs for alloy.Contact height is the vertical distance of two kinds of alloy rigid connection synapsis to graphite annulus top edge, this section away from
From being that the Main Stage of metallurgical binding occurs by spreading for two kinds of alloys, contact height is too small, and two kinds of alloys have not occurred fully
Diffusion or solidification is just cooled to by the secondary cooling water of outer crystallizer when not spreading；When contact height is excessive, composite bed melt
Backheat effect to core solidified shell is excessive, so that excessive remelting even mixed flow occurs in interface.
(5) by controlling core liquid level in 50~100mm, make to be in higher temperature, and core during two kinds of alloy contacts
Material surface is in solid-state.During two kinds of alloy contacts, core solidified shell hull-skin temperature (i.e. Contact Temperature) is compound success or failure and multiple
Close the key of effect.The invention provides a kind of new method, to control Contact Temperature, its control method is：By being tied in control
The height on brilliant device heat top controls cooling distance of the core melt in interior crystallizer, makes its distance between 50~100mm.When
Core liquid level exceedes this scope, and metallurgical binding can not occur for two kinds of alloys；When core liquid level be less than this scope,
To occur excessive remelting or mixed flow in interface.
(6) when carrying out composite casting using apparatus of the present invention and method, the aluminium alloy conduct that can have both selected solidus higher
The relatively low aluminium alloy of core alloy, solidus can select the relatively low aluminium alloy of solidus as core again as composite bed alloy
The higher aluminium alloy of alloy, solidus is used as composite bed alloy.When core alloy solidus is relatively low, composite bed alloy solidus compared with
Gao Shi, can suitably heighten core liquid level or increase interior crystallizer cooling water water, when the core is extracted interior crystallizer,
Core solidified shell has enough thickness and intensity to support not solidified melt inside core, keeps out the impact of composite bed melt；
When core alloy solidus is higher, composite bed solidus is relatively low, it can suitably reduce core liquid level or be crystallized in reducing
Device cooling water water, when the core is extracted interior crystallizer, there are higher temperature, such two kinds of alloys in core solidified shell outer surface
Alloying element can fully spread during contact, realize metallurgical binding.
(7) apparatus of the present invention and method are vertical semicontinuous composite casting, and the semicontinuous composite casting segregation of relative level is inclined
Poly- phenomenon greatly reduces, and tube blank size, the compound selection than, alloy species are more flexible, can enter according to actual needs
The design (holding structure is basically unchanged) of row crystallizer size, Optimizing Technical is produced.
Brief description of the drawings
The preparation facilities structural representation of the aluminium alloy compound pipe of Fig. 1 embodiment of the present invention, wherein：(a) it is front view；
(b) it is top view；
The interior crystallizer heat top shunting disk structure chart of Fig. 2 embodiment of the present invention；
The outer crystallizer heat top shunting disk structure chart of Fig. 3 embodiment of the present invention；
The core mold structure figure of Fig. 4 embodiment of the present invention；
The core solidified shell schematic diagram of Fig. 5 embodiment of the present invention；
In figure：1 outer crystallizer water inlet pipe, 2 water inlet pipes, 3 supports, 4 interior crystallizers, 5 interior crystallizers heat top shunting disk, 6 go out
Water pipe, 7 outer crystallizer heat top shunting disks, 8, outer crystallizer, 9 casting platforms, 10 compound interfaces, 11 table material aluminium alloys, 12 cores,
13 core alloy liquid, 14 composite pipes, 15 dummy ingots, 51 interior crystallizers heat top shunting disk entrance, 52 interior crystallizers heat top one-level stream
Road, 53 interior crystallizer branching blocks, 54 interior crystallizers heat top three-level runner, 55 interior crystallizer discharge orifices, 71 outer crystallizer heat top shuntings
Disk entrance, 72 outer crystallizer heat top shunting disk one-level chutes, 73 outer crystallizer heat top shunting disk one-level blocks, 74 outer crystallizer heat
Push up shunting disk secondary streams groove, 75 outer crystallizer heat top two grades of blocks of shunting disk, 121 core water inlets, 122 oil pipes, 123 cores heat
Top, 124 core copper sheathings, 125 core delivery ports, 126 oilholes.
Embodiment
The present invention will be described in further detail by embodiment by means of example, with reference below.It should be appreciated that
It is that embodiments of the invention are to be used to illustrate rather than limitation of the present invention.According to the essence of the present invention to this hair
The simple modifications of bright progress belong to the scope of protection of present invention.
The preparation facilities of aluminium alloy compound pipe, as shown in figure 1, including outer crystallizer 8, interior crystallizer 4, core 12, branch
Frame 3, dummy ingot 15 and casting machine；Wherein interior crystallizer 4 is located at the outer inner side of crystallizer 8, directly over outer crystallizer 8 and with one heart；Core
Mould 12 and interior crystallizer 4 are concentric, and pass through the center of interior crystallizer 4 and outer crystallizer 8；Support 3 is fixed in the outer water cavity of crystallizer 8
On, dummy ingot 15 is arranged on the bottom of core 12, and dummy ingot 15 is connected with casting machine；
Described outer crystallizer 8 includes outer crystallizer graphite annulus inner sleeve, water cooling aluminium set, water cavity and outer crystallizer heat top, water
Cold aluminium set is arranged on water cavity, and outer crystallizer graphite annulus inner sleeve is embedded in water cooling aluminium set, and water cooling aluminium set inwall lower end is provided with
It is in 45 ° and 60 ° of two groups of cooling hydrophthalmias with vertical direction, outer crystallizer heat top is fixed on water cooling aluminium set and outer crystallizer graphite annulus
Above inner sleeve, it is made up of outer crystallizer liquid reserve tank and outer crystallizer shunting disk；
Described liquid reserve tank is made up of insulation material；
Described interior crystallizer includes interior crystallizer graphite annulus inner sleeve, water cooling copper sleeve and interior crystallizer heat top, interior crystallizer
Graphite annulus inner sleeve is embedded in water cooling copper sleeve, and interior crystallizer heat top is in back taper, is fixed in interior crystallizer, interior crystallizer graphite
Put, be made up of interior crystallizer liquid reserve tank and interior crystallizer shunting disk in ring；
Described core, as shown in figure 4, including cooling system, lubricating system and core heat top 123；Cooling system includes
Oral siphon 121, outlet pipe, adapter, core water cavity, water channel and water cooling copper film, wherein, oral siphon connects core through water cooling copper film
Mould water cavity, core water cavity connects logical adapter, adapter connection outlet pipe by water channel；Lubricating system is included into oil pipe 122, oil
Chamber, oil cap and oilhole 126, wherein, enter oil pipe and be connected on oil pocket, oil pocket to be provided with oil cap, oilhole 126 is provided with oil pocket；
Core heat top 123 is located above the oil pocket of lubricating system and is in contact with it；
Described support 3, is connected with outer crystallizer 8, interior crystallizer 4 and core 12, for supporting outer crystallizer 8, interior knot
Brilliant device 4 and core 12；
Described dummy bar head, it is trapezoidal, constitute exocoel, the graphite annulus with interior crystallizer with the graphite annulus inner sleeve of outer crystallizer
Inner sleeve constitutes inner chamber；
Wherein：
Described interior crystallizer shunting disk includes 3 layers of flow dividing structure, as shown in Fig. 2 outermost layer is provided with 1 flow inlet,
Secondary outer layer is provided with 2 diffluence pass, and internal layer is provided with 4 diffluence pass；Diffluence pass is provided with block；Interior crystallizer shunting disk is set
It is equipped with the tap hole for leading to interior crystallizer graphite annulus inner sleeve；
Described outer crystallizer shunting disk includes 3 layers of flow dividing structure, as shown in figure 3, outermost layer is provided with 1 flow inlet,
Secondary outer layer is provided with 2 diffluence pass, and internal layer is provided with 4 diffluence pass；Diffluence pass is provided with block；Outer crystallizer shunting disk is set
It is equipped with the tap hole for leading to outer crystallizer graphite annulus inner sleeve；
Described liquid reserve tank is made up of insulation material；
Described core heat top is made up of insulation material.
Using the preparation facilities of above-mentioned aluminium alloy compound pipe, the method for preparing aluminium alloy compound pipe is specifically included
Following steps：
Get the raw materials ready：The melting of aluminium alloy
Distinguish two kinds of aluminium alloys with two resistance furnace meltings, and as composite bed and the molten metal of core, refining, degasification,
20 minutes are stood after skimming, heat preservation for standby use.
Step 1：
(1) by outer crystallizer, interior crystallizer and core water flowing, the logical oil of core；Core melt is injected into interior crystallizer liquid storage
Case；Composite bed melt is injected into outer crystallizer liquid reserve tank；
(2) when hydraulic pressure and stable oil pressure, make core melt 13 by interior crystallizer shunting disk 5, flow into inner chamber；Its
In, melt 13 pours into a mould multiply mode by interior crystallizer shunting disk using same level；Core melt enters back taper by runner
Heat top when, melt blocked by block after circumferentially even into ground inner chamber；
Step 2：
(1) when core melt, under the cooling of interior crystallizer graphite inner sleeve, core water cooling copper sleeve and dummy bar head, outer layer shape
During into core solidified shell A, outer crystallizer liquid reserve tank is opened, composite bed melt 11 flows into exocoel by outer crystallizer shunting disk 7；Its
In, composite bed melt 11 pours into a mould multiply mode by outer crystallizer shunting disk using same level；Composite bed melt passes through outer crystallization
Device shunting disk, exocoel is entered axially into after being split hole shunting；
(2) when composite bed melt is contacted with dummy bar head, casting machine is started；
Step 3：Composite casting：
(1) composite bed melt is contacted with core solidified shell, when composite bed melt will connect with the core solidified shell in high temperature
When touching, the former has backheat effect to the latter, makes to keep higher temperature within the time period between the two, passes through the mutual of alloying element
The compound interface with metallurgical binding is diffuseed to form, the secondary cooling water of outer crystallizer 8 is poured onto its surface, table material aluminium alloy 11 and core
Aluminium alloy 13 is cooled down rapidly, solidification, and composite pipe blank is made；
(2) when composite pipe blank reaches predetermined length, stop for stream；Cooling water is then shut off, suspends casting machine, under preparation
Once-cast.
The method of the preparation aluminium alloy compound pipe of the present embodiment, core solidified shell schematic diagram, as shown in Figure 5；Composite casting
Making process conditions is：710 DEG C of pouring temperature, casting speed 100mm/min, outer crystallizer cooling water inflow 100/minm, interior knot
Brilliant device cooling water inflow 20L/minm, core cooling water inflow 50L/minm, core oil mass 10ml/min.
Cut cross section and longitudinal section sample in composite pipe blank process stabilizing section, be polished, corrode after observation it is macroscopical and
Microstructure, energy spectrum analysis research interface element spread condition.Processing sample is intercepted again, tests its mechanical property.
The embodiment of the present invention devises core heat top shunting disk 5 and table material heat top shunting disk 7, it is ensured that each portion's alloy of pipe
Aluminium liquid is evenly distributed, and when especially table material thickness is smaller, composite bed is uniform.Employ the copper sheathing with hot top cover and oil lubrication simultaneously
Core 12, it is ensured that when composite pipe blank endoporus is smaller, prevents the leakage aluminium in multiple tube casting process, embraces the accidents such as fuse.Adopt
The generation that can be avoided interface stomata with the method cast aluminium alloy gold composite pipe of the present invention, be mingled with, interface is straight, stably, real
Now good metallurgical binding.
Claims (7)
1. a kind of preparation facilities of aluminium alloy compound pipe, it is characterised in that including outer crystallizer, interior crystallizer, core, branch
Frame, dummy ingot and casting machine；Wherein interior crystallizer is located on the inside of outer crystallizer, directly over outer crystallizer and with one heart；Core with it is interior
Crystallizer with one heart, and passes through the center of interior crystallizer and outer crystallizer；Support fixation is on outer crystallizer water cavity, and dummy ingot is arranged on
Core bottom, dummy ingot is connected with casting machine；
Described outer crystallizer, including outer crystallizer graphite annulus inner sleeve, water cooling aluminium set, water cavity and outer crystallizer heat top, water-cooling aluminum
Set is arranged on water cavity, and outer crystallizer graphite annulus inner sleeve is embedded in water cooling aluminium set, and water cooling aluminium set inwall lower end is provided with and erected
Nogata is fixed on water cooling aluminium set and outer crystallizer graphite annulus inner sleeve to two groups of cooling hydrophthalmias in 45 ° and 60 °, outer crystallizer heat top
Top, is made up of outer crystallizer liquid reserve tank and outer crystallizer shunting disk；
Described interior crystallizer, including interior crystallizer graphite annulus inner sleeve, water cooling copper sleeve and interior crystallizer heat top, interior crystallizer graphite
Ring inner sleeve is embedded in water cooling copper sleeve, and interior crystallizer heat top is in back taper, is fixed in interior crystallizer, in interior crystallizer graphite annulus
Put, be made up of interior crystallizer liquid reserve tank and interior crystallizer shunting disk；
Described core, including cooling system, lubricating system and core heat top；Cooling system includes oral siphon, outlet pipe, switching
Device, core water cavity, water channel and water cooling copper film, wherein, oral siphon connects core water cavity through water cooling copper film, and core water cavity passes through water
The logical adapter of road connection, adapter connection outlet pipe；Lubricating system is included into oil pipe, oil pocket, oil cap and oilhole, wherein, enter oil
Pipe, which is connected on oil pocket, oil pocket, is provided with oil cap, and oilhole is provided with oil pocket；Core heat top is above the oil pocket of lubricating system
And be in contact with it；
Described support, is connected with outer crystallizer, interior crystallizer and core:
Described dummy ingot, it is trapezoidal, constitute exocoel, the graphite annulus inner sleeve structure with interior crystallizer with the graphite annulus inner sleeve of outer crystallizer
Into inner chamber.
2. the preparation facilities of aluminium alloy compound pipe according to claim 1, it is characterised in that described outer crystallizer point
Flow table includes 3 layers of flow dividing structure, and outermost layer is provided with 1 flow inlet, and secondary outer layer is provided with 2~3 diffluence pass, and internal layer is provided with
4~6 diffluence pass:Diffluence pass is provided with block:Outer crystallizer shunting disk, which is provided with, leads to outer crystallizer graphite annulus inner sleeve
Tap hole.
3. the preparation facilities of aluminium alloy compound pipe according to claim 1, it is characterised in that described interior crystallizer point
Flow table includes 3 layers of flow dividing structure, and outermost layer is provided with 1 flow inlet, and secondary outer layer is provided with 2~3 diffluence pass, and internal layer is provided with
4~6 diffluence pass:Diffluence pass is provided with block:Interior crystallizer shunting disk, which is provided with, leads to interior crystallizer graphite annulus inner sleeve
Tap hole.
4. using the preparation facilities of the aluminium alloy compound pipe described in claim 1, the method for preparing alloy composite pipe base, it is special
Levy and be, comprise the following steps：
Step 1：
(1) by outer crystallizer, interior crystallizer and core water flowing, the logical oil of core；Core melt is injected into interior crystallizer liquid reserve tank；Will
Composite bed melt injects outer crystallizer liquid reserve tank；
(2) when hydraulic pressure and stable oil pressure, make core melt by interior crystallizer shunting disk, flow into inner chamber；
Step 2：
(1) when core melt, under the cooling of interior crystallizer graphite inner sleeve, core water cooling copper sleeve and dummy ingot, outer layer formation core
During solidified shell, outer crystallizer liquid reserve tank is opened, composite bed melt flows into exocoel by outer crystallizer shunting disk；
(2) when composite bed melt is contacted with dummy ingot, casting machine is started；
Step 3：Composite casting：
(1) composite bed melt is contacted with core solidified shell, forms the compound interface with metallurgical binding, and aluminum alloy composite pipe is made
Base；
(2) when aluminium alloy compound pipe reaches predetermined length, stop for stream.
5. the method according to claim 4 for preparing aluminium alloy compound pipe, it is characterised in that described step 1 (2)
In, melt pours into a mould multiply mode by interior crystallizer shunting disk using same level；Core melt enters back taper by runner
Heat top when, melt blocked by block after circumferentially even into ground inner chamber.
6. the method according to claim 4 for preparing aluminium alloy compound pipe, it is characterised in that described step 2 (1)
In, composite bed melt pours into a mould multiply mode by outer crystallizer shunting disk using same level；Composite bed melt passes through outer crystallizer
Shunting disk, exocoel is entered axially into after being split hole shunting.
7. the method according to claim 4 for preparing aluminium alloy compound pipe, it is characterised in that the described alloy for preparing is answered
The method for closing pipe, composite casting technology condition is:710~760 DEG C of pouring temperature, 50~200mm/min of casting speed, outer knot
60~200L/minm of brilliant device cooling water inflow, interior crystallizer 10~30L/minm of cooling water inflow, core cooling water inflow 30~
80L/minm, 5~20ml/min of core oil mass.
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