CN105562662A - Method for preparing bimetallic composite through combination of solid-liquid compounding and drawing of solid aluminum materials - Google Patents
Method for preparing bimetallic composite through combination of solid-liquid compounding and drawing of solid aluminum materials Download PDFInfo
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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
- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
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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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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Abstract
The invention discloses a method for preparing a bimetallic composite through combination of solid-liquid compounding and drawing of solid aluminum materials. The method comprises the step of preparing a bimetallic drawing blank through solid-liquid compounding casting and the step of drawing the blank to prepare the bimetallic composite. The method has the beneficial effects that the technological means of solid-liquid connection adopted after protection of a surface zinc layer is utilized, a series of problems that oxide inclusion, air suction, heat cracking, ingredient segregation and the like are likely to exist when aluminum and other materials are connected in a traditional welding method are solved, and the problem that oxide films are likely to be formed on the surfaces of aluminum materials at high temperature, and consequently metallurgical bonding between the aluminum and other materials is hindered is solved; and forming is achieved through a drawing method, intermediate compounds formed on an interface in the solid-liquid compounding process are broken, and the mechanical property and the physical property of the bimetallic composite and a base material are improved. According to the method, gas shield is not needed, the compounding technology is simple, the technological conditions are wide, operation is easy, the technological equipment requirement is simple, the interface bonding strength is high, and electric conductivity is good.
Description
Technical field
The invention belongs to the preparation field of double metallic composite material, specifically the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound and drawing combination, particularly a kind ofly prepares the method for double metallic composite material by drawing group technology after solid-liquid composite casting.
Background technology
Along with the development of modern industrial technology, more and more higher to the requirement of material combination property, under a lot of working condition, the metal material of single constituent element has been difficult to meet the demands.Double metallic composite material makes by various complex technique metal composite a kind of advanced composite material (ACM) of preparation together that two kinds of performances are different.Compared with the metal material of single constituent element, double metallic composite material can fully utilize two kinds of metal materials physicochemical characteristics separately, obtain the combination property that single constituent element metal can not have simultaneously, the fast development of industry and science and technology can be met preferably for the more and more higher requirement of material.
Aluminum alloy materials is one of light metal material be most widely used in industry.Due to its conduction, a series of advantage such as thermal conductivity is good, specific strength is high, corrosion resistance is good, be widely used in the fields such as the anticorrosion and daily living article of Aero-Space, military project manufacture, shipbuilding, chemical metallurgy, energy source and power, packaging.Find, between aluminum alloy materials and other materials, to pay attention to widely as the double metallic composite material between magnesium alloy, kirsite, aluminium alloy receives too through investigation.As magnalium double metallic composite material is applied to automobile structure and automotive engine, utilize intensity of aluminum alloy, corrosion resistance and light weight, and the advantage that the quality of magnesium alloy materials is light.Aluminium Al bimetal composite is applied to automobile structure, physicochemical properties different between comprehensive each system aluminium alloy.
When using traditional welding method to prepare double metallic composite material, often there is various defect.When preparing aluminium Al bimetal composite as welded, often there is a series of problem such as oxide slag inclusion, air-breathing, hot tearing, component segregation.When utilizing welding method to prepare magnalium double metallic composite material, often occur that intermediate compound is blocked up and affect the phenomenon of double metallic composite material performance.Through finding the retrieval of prior art, method common except welding method can be divided into solid-liquid compound, admittedly compound and liquid liquid compound according to the difference of materials behavior.For being admittedly solidly connected method, as extruding, production efficiency is higher, but because aluminium is very easy to oxidation under atmospheric environment, especially under hot conditions, all can form fine and close oxide-film between two kinds of metals, the existence of oxide-film seriously can hinder the interaction between two kinds of metals, worsen quality of connection, be not easy to form good metallurgical binding.Connect for liquid liquid and be then often subject to the restriction of equipment, have very strict requirement for the profile of material, size, this also limits the promotion and application of Cu-Al bimetal material to a certain extent.Compared to consolidating compound and liquid liquid compound, solid-liquid complex technique operation is simple, little by form factor constraint, process equipment requires simply, production efficiency is higher, is just receiving increasing concern.But there is certain deficiency in solid-liquid compound equally, find through retrieval, the people such as Zhang are at " MetallurgicalandMaterialsTransactionsB " periodical 2014, the ImprovedInterfacialBondinginMagnesium/AluminumOvercastin gSystemsbyAluminumSurfaceTreatments (interface being optimized magnalium bimetallic material by aluminum alloy surface process is connected) delivered on 45 (6): 2495-2503 mentions, in liquid-solid composite process, easily on interface, thicker intermediate compound is generated when pouring temperature is higher, affect bond strength and the physical property of Cu-Al bimetal composite.Visible, each method has its distinctive advantage, but has certain limitation.
When using traditional welding method to prepare double metallic composite material, due to physical property between copper alloy and aluminium alloy as fusing point, specific heat capacity, linear expansion coefficient etc. differ greatly, the thermal conductivity of two kinds of metals is all fine simultaneously, so often there is a series of problem such as oxide slag inclusion, air-breathing, hot tearing, component segregation in welding process.Through finding the retrieval of prior art, the method that between copper aluminium, compound is common except welding method can be divided into solid-liquid compound, admittedly compound and liquid liquid compound according to the difference of materials behavior.For being admittedly solidly connected method, as drawing, production efficiency is higher, but because aluminium and copper are all very easy to oxidation under atmospheric environment, especially under hot conditions, all can form fine and close oxide-film between two kinds of metals, the existence of oxide-film seriously can hinder the interaction between two kinds of metals, worsen quality of connection, be not easy to form good metallurgical binding.Connect for liquid liquid and be then often subject to the restriction of equipment, have very strict requirement for the profile of material, size, this also limits the promotion and application of Cu-Al bimetal material to a certain extent.Solid-liquid compound is little by form factor constraint, process equipment requires simple, but easily on interface, generates thicker intermediate compound when pouring temperature is higher, affects bond strength and the physical property of Cu-Al bimetal composite.Each method has its distinctive advantage, but has certain limitation.
Find prior art retrieval further, researcher begins through two kinds of complex methods and combines and prepare Cu-Al bimetal composite to overcome the deficiency of single method.Chinese patent CN102626854A discloses a kind of method that blast adds the full copper-clad aluminum composite bar of Rolling Production.The method that this technology utilizes explosive welding to add rolling combination has prepared Cu-Al bimetal composite, two kinds are utilized admittedly to be solidly connected method in technique, surface does not have specially treated, so two kinds of metal interfaces can exist oxide-film, simultaneously higher for the shape requirement of material.Chinese patent CN101364459A discloses a kind of production method and equipment of copper coated aluminum bus bank.This technology utilizes the method for extruding and hot rolling combination to prepare Cu-Al bimetal composite; but owing to being utilize two kinds to be admittedly solidly connected method; and in order to avoid the impact of oxide-film, in heat treatment process, introduce inert gas shielding, require higher for equipment and preparation condition.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of solid-state aluminium solid-liquid compound and the method for double metallic composite material is prepared in drawing combination, solving existing complex technique often causes calmodulin binding domain CaM to form oxide slag inclusion, air-breathing, hot tearing, component segregation, the existence of simultaneous oxidation film has a strong impact on a series of problems such as the performance of interaction between two kinds of metals and double metallic composite material is lower, make to form metallurgical binding between two kinds of aluminium alloys, there is excellent mechanical property.
The present invention is achieved by the following technical solutions:
The invention provides a kind of solid-state aluminium solid-liquid compound and the method for double metallic composite material is prepared in drawing combination, described method comprises the step that solid-liquid composite casting prepares Slug preparing double metallic composite material described in the step of bimetallic drawing blank, drawing.
Preferably, the step that solid-liquid composite casting prepares bimetallic drawing blank specifically comprises:
Process preset: surface treatment is carried out to the preset material of solid aluminum to be connected, is preset in mold cavity after process;
Casting combines: be poured in described mold cavity by material to be cast for liquid state, and casting forms bimetallic drawing blank.
Preferably, described preset solid aluminum material comprises fine aluminium, Birmasil, wrought aluminium alloy, and described mould material is the metal of fusing point less than or equal to solid aluminum material or the alloy of described metal; Wherein, described metal comprises aluminium, magnesium, zinc etc.When mould material is aluminium, because the kind of aluminium is very many, although be all aluminium, different types of aluminium can be selected, equally can different performance advantage thus obtain the double metallic composite material with premium properties between comprehensive different aluminium.
Preferably, process in preset step, described surface treatment specifically refers to zinc-plated protective layer;
Preferably, the implementation of described zinc-plated protective layer comprises plating, chemical plating, hot-dip, thermal spraying, vapour deposition etc.; The thickness of described zinc protective layer is 0.1 ~ 50 μm.Zinc layers is too thin can gasify before cast, and surface is oxidized then, can not play a protective role.Blocked up zinc layers can not be added in mould material completely and go, and causes forming metallurgical binding.Or forming metallurgical bonding interface place has zinc to assemble, and the gathering of zinc can affect the performance of double metallic composite material.
Preferably, in the step that casting combines, the method for described casting comprises sand casting, permanent mold casting, low pressure casting, high-pressure casting, vacuum pressing and casting, extrusion casint, centrifugal casting etc.
Preferably, in the step that casting combines, described pouring temperature is 450 ~ 800 DEG C; Pouring temperature likely causes lower than 450 DEG C fills type difficulty, is difficult to melted surface zinc layers simultaneously, can not forms metallurgical binding.The serious fusing of aluminum strip may be caused higher than 800 DEG C, lose the meaning as the preset material of high-performance; Further preferably, described pouring temperature is 450 ~ 720 DEG C.
Preferably, in the step of Slug preparing double metallic composite material described in drawing, the mode of described drawing comprise directly pull out, directly pull out continuously, coil pull out, one or several combination in spinning, tube rolling processing method; The temperature of drawing is below-100 ~ mould material fusing point 100 DEG C; The undergauge ratio of drawing is 1/100 ~ 90/100; The undergauge speed of drawing is 10 ~ 400m/min.When drawing temperature is lower than-100 DEG C, processability is very poor, in drawing process, there will be the defects such as crackle.Temperature higher than upper mould material in limited time even the preset material of solid aluminum likely melt.Undergauge ratio is lower than 1/100, and substantially do not have deformation effect, the damaged effect for intermediate compound is very weak, the material interface obtained can exist thicker intermediate compound, affects performance.Undergauge ratio is higher than 90/100, and the processability for equipment/material requires very high, and is easy to occur the defects such as crackle.Undergauge is higher than 400m/min, and deformation velocity is very fast, is easy to occur the defects such as crackle.And lower than 10m/min, production efficiency is lower.Further preferably, the temperature of drawing is 200 ~ 500 DEG C.
Preferably, the step of Slug preparing double metallic composite material described in drawing also comprises and carries out the process of drawing after annealing, take-up to gained double metallic composite material.
Preferably, the temperature of described annealing in process is below 100 ~ mould material fusing point 100 DEG C, and the time of annealing in process is 5 ~ 300min.Temperature lower than 100 DEG C or the time is less than 5min time, removal stress effect can not be played, and effect more weak, be difficult to react, cause the poor-performing of double metallic composite material.When temperature is longer than 300min higher than the upper limit or time, vigorous reaction between two kinds of metals, intermediate compound layer thickness can be very thick, the character that intermediate compound is firmly crisp can affect the performance of double metallic composite material, or cause the mould material even preset material fusing of solid aluminum, required double metallic composite material can not be formed.Further preferably, the temperature of described annealing in process is 100 ~ 500 DEG C.
Preferably, the step of Slug preparing double metallic composite material described in drawing also comprises and carries out annealing in process before drawing to gained bimetallic drawing blank.
Preferably, the temperature of described annealing in process is below 100 ~ mould material fusing point 100 DEG C, and the time of annealing in process is 0 ~ 300min.Before can not carrying out drawing, heat treatment directly carries out drawing.As entered the front heat treatment of drawing pressure, when temperature is less than 100 DEG C, the effect removing stress can not be played.When temperature is longer than 300min higher than the upper limit or time, vigorous reaction between two kinds of metals, intermediate compound layer thickness can be very thick, the defects such as crackle may be there is, the double metallic composite material performance that can affect drawing process simultaneously and obtain, or cause the mould material even preset material fusing of solid aluminum, required double metallic composite material can not be formed.
Compared with existing other technologies, the present invention has following beneficial effect:
1, compared with traditional welding method, the appearance of the problems such as oxide slag inclusion, air-breathing, hot tearing, component segregation is avoided;
2, compared with single liquid liquid complex method, lower to equipment requirement, lower for the profile of material, dimensional requirement;
3, compared with single complex method admittedly, solve the problem of surface film oxide, the zinc layers of uniformly continous can be formed at the preset material surface of solid aluminum, make the physical property of double metallic composite material reach higher level;
4, compared with single solid-liquid complex method, solve the problem that when pouring temperature controls bad, interface can be formed thicker intermediate compound, improve mechanical property and the physical property of double metallic composite material, compared to single solid-liquid compound, cutting performance improves nearly one times.The performance of aluminium and mould material matrix material have also been obtained raising simultaneously.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the schematic diagram that after preset solid-state aluminium, double metallic composite material is prepared in solid-liquid composite casting and drawing combination; Wherein, 1 is the preset material of solid aluminum, and 2 is mould material.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
Fig. 1 is that following embodiment prepares the schematic diagram of double metallic composite material by solid-liquid composite casting after preset solid-state aluminium and drawing combination; Wherein, 1 is the preset material of solid aluminum, and 2 is mould material.
embodiment 1
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, comprises the steps:
Step one, carry out the process of thermal spraying zinc surface to solid-state 6101 As-extruded aluminum alloy materials to be connected, zinc coating thickness is 10 μm;
Step 2, the solid-state 6101 As-extruded aluminium alloys after surface treatment are preset at desired location in mold cavity;
Step 3, in resistance furnace, melt AZ91 magnesium alloy after pour in mold cavity, utilize the processing technology of extrusion casint, pouring temperature is 700 DEG C, and extrusion casint pressure is 60MPa, makes to form metallurgical binding between aluminium and magnesium;
Step 4, the 6101-AZ91 magnalium bimetallic drawing blank obtained carried out annealing in process before drawing, annealing temperature is 100 DEG C, and annealing time is 300min, then proceed drawing processing, technique is for directly to pull out, and drawing temperature is 200 DEG C, undergauge ratio is 30/100, and drawing speed is 30m/min;
Step 5, the magnalium double metallic composite material obtained is put into annealing furnace carry out the process of drawing after annealing, annealing temperature is 200 DEG C, and annealing time is 30min, then carries out finished product take-up.
Find after testing not occur the defect such as oxide slag inclusion, air-breathing, hot tearing at calmodulin binding domain CaM.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding (see Fig. 1).After testing, magnalium double metallic composite material good mechanical properties, shear strength is 46MPa.
embodiment 2
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, comprises the steps:
Step one, carry out electrogalvanizing surface treatment to the preset material of solid-state A356 Birmasil to be connected, zinc coating thickness is 0.1 μm;
Step 2, the solid-state A356 Birmasil after surface treatment is preset at desired location in mold cavity;
Step 3, in resistance furnace, melt AZ31 magnesium alloy after pour in mold cavity, utilize the processing technology of extrusion casint, pouring temperature is 660 DEG C, and extrusion casint pressure is 30MPa, makes to form metallurgical binding between aluminium and magnesium;
Step 4, the A356-AZ31 magnalium bimetallic drawing blank obtained carried out annealing in process before drawing, annealing temperature is 300 DEG C, and annealing time is 50min, then proceed drawing processing, technique is for directly to pull out continuously, and drawing temperature is 200 DEG C, undergauge ratio is 60/100, and drawing degree is 20m/min;
Step 5, the magnalium double metallic composite material obtained is put into annealing furnace carry out the process of drawing after annealing, annealing temperature is 100 DEG C, and annealing time is 50min, then carries out finished product take-up.
Find after testing not occur the defect such as oxide slag inclusion, air-breathing, hot tearing at calmodulin binding domain CaM.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding.After testing, magnalium double metallic composite material good mechanical properties, shear strength is 56MPa.
embodiment 3
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, comprises the steps:
Step one, carry out the process of thermal spraying zinc surface to the preset material of solid pure aluminium to be connected, zinc coating thickness is 15 μm;
Step 2, the solid-state fine aluminium after surface treatment is preset at desired location in mold cavity;
Step 3, in resistance furnace, melt ZA-12 kirsite after pour in mold cavity, utilize the processing technology of permanent mold casting, pouring temperature is 700 DEG C, makes to form metallurgical binding between aluminum and zinc;
Step 4, the fine aluminium-ZA-12 aluminium zinc bimetallic obtained is carried out drawing processing, technique is for directly to pull out, and drawing temperature is 250 DEG C, and undergauge ratio is 10/100, and drawing speed is 20m/min;
Step 5, the aluminium zinc double metallic composite material obtained is put into annealing furnace carry out the process of drawing after annealing, annealing temperature is 300 DEG C, and annealing time is 20min, then carries out finished product take-up.
Find after testing not occur the defect such as oxide slag inclusion, air-breathing, hot tearing at calmodulin binding domain CaM.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding.After testing, aluminium zinc double metallic composite material good mechanical properties, shear strength is 34MPa.
embodiment 4
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, comprises the steps:
Step one, carry out galvanizing by dipping surface treatment to the preset material of solid-state 6101 As-extruded aluminium alloy to be connected, zinc coating thickness is 50 μm;
Step 2, the solid-state 6101 As-extruded aluminium alloys after surface treatment are preset at desired location in mold cavity;
Step 3, in resistance furnace, melt Zn-0.08Pb kirsite after pour in mold cavity, utilize the processing technology of extrusion casint, pouring temperature is 540 DEG C, and extrusion casint pressure is 30MPa, makes to form metallurgical binding between aluminum and zinc;
Step 4, the 6101-Zn-0.08Pb aluminium zinc bimetallic drawing blank obtained carried out annealing in process before drawing, annealing temperature is 350 DEG C, and annealing time is 5min, then proceed drawing processing, technique is for directly to pull out, and drawing temperature is 200 DEG C, undergauge ratio is 90/100, and drawing speed is 5m/min;
Step 5, the aluminium zinc double metallic composite material obtained is put into annealing furnace carry out the process of drawing after annealing, annealing temperature is 100 DEG C, and annealing time is 20min, then carries out finished product take-up.
Find after testing not occur the defect such as oxide slag inclusion, air-breathing, hot tearing at calmodulin binding domain CaM.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding.After testing, aluminium zinc double metallic composite material good mechanical properties, shear strength is 90MPa.
embodiment 5
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, comprises the steps:
Step one, carry out the process of thermal spraying zinc surface to the preset material of solid-state 6101 aluminium alloy to be connected, zinc coating thickness is 25 μm;
Step 2, solid-state 6101 aluminium alloys after surface treatment are preset at desired location in mold cavity;
Step 3, in resistance furnace, melt commercial-purity aluminium after pour in mold cavity, utilize the processing technology of sand casting, pouring temperature is 700 DEG C, makes to form metallurgical binding between aluminium and aluminium;
Step 4, the 6101-fine aluminium aluminium Al bimetal drawing blank obtained carried out annealing in process before drawing, annealing temperature is 200 DEG C, and annealing time is 20min, then proceed drawing processing, technique is for directly to pull out continuously, and drawing temperature is 500 DEG C, undergauge ratio is 1/100, and drawing speed is 5m/min;
Step 5, the aluminium Al bimetal composite obtained is put into annealing furnace carry out the process of drawing after annealing, annealing temperature is 500 DEG C, and annealing time is 10min, then carries out finished product take-up.
The defect such as oxide slag inclusion, air-breathing, hot tearing is there is not at calmodulin binding domain CaM after 6101 aluminium alloys and fine aluminium solid-liquid combination; There is no obvious interface between two kinds of aluminium alloys, define metallurgical binding, utilize surface protection zinc layers well to solve a difficult problem for oxide-film obstruction metallurgical binding formation.After testing, aluminium Al bimetal composite materials property is good, and shear strength is 36MPa.
embodiment 6
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, comprises the steps:
Step one, carry out electrogalvanizing surface treatment to the preset material of solid-state 6101 extruding aluminium alloy to be connected, zinc coating thickness is 15 μm;
Step 2, solid-state 6101 extruding aluminium alloys after surface treatment are preset at desired location in mold cavity;
Step 3, in resistance furnace, melt A356 Birmasil after pour in mold cavity, utilize the processing technology of extrusion casint, pouring temperature is 720 DEG C, and extrusion casint pressure is 120MPa, makes to form metallurgical binding between aluminium and aluminium;
Step 4, the 6101-A356 aluminium Al bimetal drawing blank obtained carried out annealing in process before drawing, annealing temperature is 100 DEG C, and annealing time is 50min, then proceed drawing processing, technique is for directly to pull out, and drawing temperature is 300 DEG C, undergauge ratio is 40/100, and drawing speed is 50m/min;
Step 5, the aluminium Al bimetal composite obtained is put into annealing furnace carry out the process of drawing after annealing, annealing temperature is 150 DEG C, and annealing time is 20min, then carries out finished product take-up.
The defect such as oxide slag inclusion, air-breathing, hot tearing is there is not at calmodulin binding domain CaM after 6101 aluminium alloys and A356 aluminium alloy solid-liquid combination; Do not have obvious interface between two kinds of aluminium alloys, define metallurgical binding, A356 dendrite directly grows from 6101 matrixes; Surface protection zinc layers is utilized well to solve a difficult problem for oxide-film obstruction metallurgical binding formation.After testing, aluminium Al bimetal composite materials property is good, and shear strength is 86MPa.
comparative example 1
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, and technical scheme is identical with embodiment 1, and difference is only that galvanized layer thickness is 70 μm.
Find after testing to have occurred the defect such as oxide slag inclusion, pore at calmodulin binding domain CaM.Can not form metallurgical binding between bi-material, interface zone does not form the intermetallic compound of continuous uniform, and Zn-ef ficiency is assembled in interface, interface has obvious crackle occur.After testing, magnalium double metallic composite material mechanical property is poor, and shear strength is 6MPa.
comparative example 2
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, and technical scheme is identical with embodiment 1, and difference does not carry out drawing procedure after being only solid-liquid composite casting.
Find after testing not occur the defect such as oxide slag inclusion, air-breathing, hot tearing at calmodulin binding domain CaM.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding, but forms firmly thick intermediate compound between two kinds of metals, has a strong impact on switching performance.After testing, magnalium double metallic composite material mechanical property is poor, and shear strength is 12MPa.
comparative example 3
The present embodiment relates to a kind of solid-state aluminium solid-liquid compound and the method preparing double metallic composite material is combined in drawing, technical scheme is identical with embodiment 1, difference be only drawing blank be without solid-liquid composite casting connect aluminium and magnesium material, mechanical split carries out drawing procedure together.
Find after testing not occur the defect such as slag inclusion, air-breathing, hot tearing at calmodulin binding domain CaM.Metallurgical binding is formed between bi-material, interface zone has intermetallic compound, illustrate that two intermetallics define metallurgical binding, but intermetallic compound is also discontinuous, and there is oxide skin between two kinds of metals, existence just because of oxide skin have impact between two kinds of metals and forms continuous print intermetallic compound, cause switching performance and electric conductivity poorer than result in embodiment one.After testing, magnalium double metallic composite material mechanical property is poor, and shear strength is 5MPa.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (10)
1. the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound and drawing combination, it is characterized in that, described method comprises the step that solid-liquid composite casting prepares Slug preparing double metallic composite material described in the step of bimetallic drawing blank, drawing.
2. the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound according to claim 1 and drawing combination, and it is characterized in that, the step that solid-liquid composite casting prepares bimetallic drawing blank specifically comprises:
Process preset: surface treatment is carried out to the preset material of solid aluminum to be connected, is preset in mold cavity after process;
Casting combines: be poured in described mold cavity by material to be cast for liquid state, and casting forms bimetallic drawing blank.
3. the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound according to claim 2 and drawing combination, and it is characterized in that, described preset solid aluminum material comprises fine aluminium, Birmasil, wrought aluminium alloy; Described mould material is the metal or alloy of fusing point less than or equal to solid aluminum material.
4. the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound according to claim 2 and drawing combination, and it is characterized in that, process in preset step, described surface treatment specifically refers to zinc-plated protective layer.
5. the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound according to claim 2 and drawing combination, it is characterized in that, in the step that casting combines, the method for described casting comprises sand casting, permanent mold casting, low pressure casting, high-pressure casting, vacuum pressing and casting, extrusion casint or centrifugal casting; Described pouring temperature is 450 ~ 800 DEG C.
6. the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound according to claim 1 and drawing combination, it is characterized in that, in the step of Slug preparing double metallic composite material described in drawing, the mode of described drawing comprise directly pull out, directly pull out continuously, coil pull out, one or several combination in spinning, tube rolling processing method;
The temperature of drawing is below-100 ~ mould material fusing point 100 DEG C;
The undergauge ratio of drawing is 1/100 ~ 90/100;
The undergauge speed of drawing is 10 ~ 400m/min.
7. the method for double metallic composite material is prepared in the solid-state aluminium solid-liquid compound according to claim 1 or 6 and drawing combination, it is characterized in that, the step of Slug preparing double metallic composite material described in drawing also comprises carries out the process of drawing after annealing, take-up to gained double metallic composite material.
8. the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound according to claim 7 and drawing combination, and it is characterized in that, the temperature of described annealing in process is below 100 ~ mould material fusing point 100 DEG C, and the time of annealing in process is 5 ~ 300min.
9. the method for double metallic composite material is prepared in the solid-state aluminium solid-liquid compound according to claim 1 or 6 and drawing combination, it is characterized in that, the step of Slug preparing double metallic composite material described in drawing also comprises carries out annealing in process before drawing to gained bimetallic drawing blank.
10. the method for double metallic composite material is prepared in solid-state aluminium solid-liquid compound according to claim 9 and drawing combination, and it is characterized in that, the temperature of described annealing in process is below 100 ~ mould material fusing point 100 DEG C, and the time of annealing in process is 0 ~ 300min.
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| CN201510980374.9A CN105562662A (en) | 2015-12-23 | 2015-12-23 | Method for preparing bimetallic composite through combination of solid-liquid compounding and drawing of solid aluminum materials |
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| CN113684392A (en) * | 2021-07-06 | 2021-11-23 | 惠州学院 | Preparation method of SiC/Al bimetal composite material |
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