CN105537858A - Method for preparing bimetal composite material by solid and liquid bonding and extruding on solid steel in combined manner - Google Patents
Method for preparing bimetal composite material by solid and liquid bonding and extruding on solid steel in combined manner Download PDFInfo
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- CN105537858A CN105537858A CN201510980432.8A CN201510980432A CN105537858A CN 105537858 A CN105537858 A CN 105537858A CN 201510980432 A CN201510980432 A CN 201510980432A CN 105537858 A CN105537858 A CN 105537858A
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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
- B23P13/00—Making metal objects by operations essentially involving machining but not covered by a single other subclass
- B23P13/02—Making metal objects by operations essentially involving machining but not covered by a single other subclass in which only the machining operations are important
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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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
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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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/005—Continuous extrusion starting from solid state material
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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
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
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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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Abstract
The invention discloses a method for preparing a bimetal composite material by solid and liquid bonding and extruding on solid steel in a combined manner. The method comprises the following steps: preparing a bimetal extruding blank by solid and liquid bonding casting; and extruding the blank to prepare the bimetal composite material. The method is characterized in that by a process means of solid and liquid connection after surface zinc layer protection, a series of problems such as air holes, burn-through and over thick intermediate compound layers which are easily caused when the steel is connected with other materials by the traditional welding method are solved, the problem that an oxidation film is easily formed on the surface of steel at high temperature and stops metallurgical bonding between the steel and the other materials from being formed is solved, forming is implemented by an extruding method, an intermediate compound formed on an interface in a solid and liquid bonding process is broken, and mechanical properties and physical properties of the bimetal composite material and a base material are improved. By the method, gas shield is not required, a composite technology is simple, process conditions are broad and the process is easy to operate, equipment requirements of the process are simple, interface bonding strength is high, and electrical conductivity and heat conductivity are good.
Description
Technical field
The invention belongs to the preparation field of double metallic composite material, specifically a method for double metallic composite material is prepared in solid-state steel solid-liquid compound and extruding combination, i.e. a kind of method being prepared double metallic composite material by solid-liquid composite casting after preset solid-state steel and extruding group technology.
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.Therefore, study and an important development direction of preparing advanced composite material (ACM) and become Materials Science and Engineering field.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.Compared to single metal material, its advantage is in particular in following three aspects: the combination property that (1) is excellent; (2) good economic benefit; (3) designability widely.
Steel are due to its excellent comprehensive mechanical property, and being widely used in the industries such as aviation, machinery, automobile, oil, building, is one of most widely used metal.Find through investigation, the double metallic composite material that steel other materials is compounded to form, as steel Al bimetal composite, steel magnesium double metallic composite material etc. receive increasing concern.But when using traditional welding method to prepare double metallic composite material, the physics and chemistry character often owing to differing larger between two kinds of metals causes various defect to occur.As steel Al bimetal material, between two kinds of metals, fusing point difference is close to 1000 DEG C, is difficult to realize welding, a series of problems such as occurring pore through welding point of being everlasting simultaneously, burn, intermediate compound layer is blocked up.Through finding the retrieval of prior art, the method that between steel 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 extruding, production efficiency is higher, but because aluminium and titanium 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 can hinder the formation of metallurgical binding.Liquid liquid connects and is then often subject to the restriction of equipment, and have very strict requirement for the profile of material, size, this also limits the promotion and application of the bimetallic material such as steel magnesium, steel aluminium 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 Dezellus are at " InternationalJournalofAdhesionandAdhesives " periodical 2007, the Mechanicaltestingofsteel/aluminium – siliconinterfacesbypushout (steel and alusil alloy interface mechanical characteristic are studied) that 27:417-421 delivers mentions, in liquid-solid composite process, easily on interface, generate thicker intermediate compound when pouring temperature is higher, affect bond strength and the physical property of steel Al bimetal composite.Visible, 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 double metallic composite material 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 of metals 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 of metals 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 steel solid-liquid compound and extrude the method combining and prepare double metallic composite material, solve when existing complex technique connects steel and other material a series of problems such as often causing calmodulin binding domain CaM to form pore, oxide slag inclusion, to burn, the existence simultaneously solving oxide-film and intermediate compound 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 alloys, there is excellent mechanical property.
The present invention is achieved by the following technical solutions:
The invention provides a kind of solid-state steel solid-liquid compound and extrude the method combining and prepare double metallic composite material, described method comprises solid-liquid composite casting and prepares the step of Thermometal extrusion blank, extrudes the step of described Slug preparing double metallic composite material.
Preferably, the step that solid-liquid composite casting prepares Thermometal extrusion blank specifically comprises:
Process preset: surface treatment is carried out to the preset material of solid steel 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 Thermometal extrusion blank.
Preferably, process in preset step, described surface treatment specifically refers to zinc-plated protective layer;
Preferably, process in preset step, 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 meeting causes zinc layers not to be added in mould material completely and goes, 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, described mould material comprises the metal or alloy of the fusing points such as aluminium, magnesium, steel less than or equal to solid steel material.When mould material is steel, because the kind of steel is very many, although be all steel, different types of steel can be selected, equally can different performance advantage thus obtain the double metallic composite material with premium properties between comprehensive different steel.
Preferably, in the step that casting combines, described pouring temperature is 450 ~ 1800 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 preset steel may be caused higher than 1600 DEG C, lose the meaning as the preset material of high-performance.
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, extrude in the step of described Slug preparing double metallic composite material, the preheat temperature of Thermometal extrusion blank is below 100 ~ mould material fusing point 100 DEG C, and the temperature of extrusion die is below 100 ~ mould material fusing point 100 DEG C, extrusion ratio is 2 ~ 100, and extrusion speed is 1 ~ 50mm/s; Further preferably, described extrusion speed is 1 ~ 30mm/s; When preheat temperature and mold temperature are lower than 100 DEG C, blank mouldability is poor, easily the defects such as crackle occur, and temperature is higher than upper the mould material even fusing point of steel of likely reaching in extrusion process in limited time, cause material to melt, required bimetallic material can not be formed.When extrusion speed is higher than 50mm/s, can affect its mouldability, same there will be the defects such as crackle.For extrusion speed lower limit, there is no particular/special requirement, but the production efficiency of considering, generally can not continue to reduce.Further preferably, the preheat temperature of Thermometal extrusion blank is 100 ~ 350 DEG C, and the temperature of extrusion die is 100 ~ 350 DEG C.
Preferably, the step extruding described Slug preparing double metallic composite material also comprises the step of after extrusion composite being carried out to annealing in process.
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; Described annealing in process specifically adopts annealing furnace.Temperature lower than 100 DEG C or the time is less than 5min time, removal stress effect can not be played, and act on more weak between steel and mould material, 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 likely exceed the mould material even fusing point of steel, cause material to melt, can not bimetallic material be formed.Further preferably, the temperature of described annealing in process is 100 ~ 350 DEG C.
Preferably, the step extruding described Slug preparing double metallic composite material also comprises the step of before extrusion blank being carried out to annealing in process.
Preferably, the temperature of described annealing in process is below 100 ~ mould material fusing point 100 DEG C, the time is 0 ~ 300min.Can not carry out extruding front heat treatment directly to extrude.As carried out extruding front heat treatment, 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, simultaneously can influence of rolled process and the double metallic composite material performance that obtains, or cause the mould material even preset material fusing of solid steel, required double metallic composite material can not be formed.
Compared with prior art, the present invention has following beneficial effect:
1, compared with traditional welding method, avoid pore, oxide slag inclusion, burn, the appearance of the problem such as intermediate compound layer is blocked up;
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 steel, 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 promotes clearly.The performance of steel and cast 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 that after preset solid-state steel, double metallic composite material is prepared in solid-liquid composite casting and extruding combination; Wherein, 1 is the preset material of solid steel, and 2 is liquid pouring moulding 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.
Material prepared by the present invention is specifically shown in Fig. 1; Wherein, 1 is the preset material of solid steel, and 2 is liquid pouring moulding material.
embodiment 1
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, comprises the steps:
Step one, carry out the process of thermal spraying zinc surface to the preset material of solid-state Q235A structural steel to be connected, zinc coating thickness is 1 μm;
Step 2, the solid-state Q235A structural steel after surface treatment is preset at desired location in mold cavity;
Step 3, melt in resistance furnace in 6101 As-extruded aluminum alloy mould die cavities, utilize the processing technology of permanent mold casting, pouring temperature is 680 DEG C, makes to form metallurgical binding between steel and aluminium;
Step 4, Q235A structural steel-6101 steel Al bimetal extrusion billet obtained is carried out extruding front annealing in process, annealing temperature is 200 DEG C, annealing time is 30min, then extrusion process is proceeded, extrusion billet preheat temperature is 150 DEG C, and mold temperature is 150 DEG C, and extrusion ratio is 10, in extrusion process, extrusion speed is 1mm/s;
Step 5, the steel Al bimetal composite obtained is put into annealing furnace carry out the process of extruding after annealing, annealing temperature is 100 DEG C, and annealing time is 300min.
Defects such as finding not occur pore, oxide slag inclusion at calmodulin binding domain CaM after testing, burn, intermediate compound layer is blocked up.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding.After testing, steel Al bimetal composite property is good, and shear strength is 80MPa.
embodiment 2
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, comprises the steps:
Step one, carry out the process of thermal spraying zinc surface to the preset material of solid-state 316L stainless steel to be connected, zinc coating thickness is 15 μm;
Step 2, the solid-state 316L stainless steel after surface treatment is 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 700 DEG C, extrusion casint pressure is 70MPa, makes to form metallurgical binding between steel and aluminium;
Step 4, the 316L-A356 steel Al bimetal composite material obtained is proceeded extrusion process, extrusion billet preheat temperature is 200 DEG C, and mold temperature is 200 DEG C, and extrusion ratio is 2, and in extrusion process, extrusion speed is 5mm/s;
Step 5, the steel Al bimetal composite obtained is put into annealing furnace carry out the process of extruding after annealing, annealing temperature is 100 DEG C, and annealing time is 100min.
Defects such as finding not occur pore, oxide slag inclusion at calmodulin binding domain CaM after testing, burn, intermediate compound layer is blocked up.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding.After testing, steel Al bimetal composite property is good, and shear strength is 78MPa.
embodiment 3
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, comprises the steps:
Step one, carry out the process of thermal spraying zinc surface to the preset material of solid-state 316L stainless steel to be connected, zinc coating thickness is 15 μm;
Step 2, the solid-state 316L stainless steel after surface treatment is 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 50MPa, makes to form metallurgical binding between steel and magnesium;
Step 4, the 316L-AZ91 steel magnesium Thermometal extrusion blank obtained is carried out extruding front annealing in process, annealing temperature is 100 DEG C, annealing time is 300min, then extrusion process is proceeded, extrusion billet preheat temperature is 100 DEG C, and mold temperature is 100 DEG C, and extrusion ratio is 100, in extrusion process, extrusion speed is 5mm/s;
Step 5, the steel magnesium double metallic composite material obtained is put into annealing furnace carry out the process of extruding after annealing, annealing temperature is 300 DEG C, and annealing time is 5min.
Defects such as finding not occur pore, oxide slag inclusion at calmodulin binding domain CaM after testing, burn, intermediate compound layer is blocked up.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding.After testing, steel magnesium double metallic composite material is functional, and shear strength is 85MPa.
embodiment 4
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, comprises the steps:
Step one, carry out the process of thermal spraying zinc surface to the preset material of solid-state 16MnL Hi-Stren steel to be connected, zinc coating thickness is 50 μm;
Step 2, the solid-state 16MnL Hi-Stren steel 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 sand casting, pouring temperature is 720 DEG C, makes to form metallurgical binding between steel and magnesium;
Step 4, the 16MnL-AZ31 steel magnesium Thermometal extrusion blank obtained is carried out extruding front annealing in process, annealing temperature is 100 DEG C, annealing time is 500min, then extrusion process is proceeded, extrusion billet preheat temperature is 200 DEG C, and mold temperature is 300 DEG C, and extrusion ratio is 5, in extrusion process, crowded speed is 10mm/s;
Step 5, the magnalium double metallic composite material obtained is put into annealing furnace carry out the process of extruding after annealing, annealing temperature is 200 DEG C, and annealing time is 60min.
Defects such as finding not occur pore, oxide slag inclusion at calmodulin binding domain CaM after testing, burn, intermediate compound layer is blocked up.Form metallurgical binding between bi-material, interface zone has the intermetallic compound of continuous distributed, illustrates that two intermetallics define metallurgical binding.After testing, steel magnesium double metallic composite material is functional, and shear strength is 55MPa.
embodiment 5
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, comprises the steps:
Step one, carry out electrogalvanizing surface treatment to the preset material of solid-state 16MnL Hi-Stren steel to be connected, zinc coating thickness is 0.1 μm;
Step 2, the solid-state 16MnL Hi-Stren steel after surface treatment is preset at desired location in mold cavity;
Step 3, in resistance furnace, melt Q235 structural steel after pour in mold cavity, utilize the processing technology of extrusion casint, pouring temperature is 1400 DEG C, and extrusion casint pressure is 50MPa, makes to form metallurgical binding between steel and steel;
Step 4, the 16MnL-Q235 steel bimetal copper-steel extrusion billet obtained is carried out extruding front annealing in process, annealing temperature is 350 DEG C, annealing time is 10min, then extrusion process is proceeded, extrusion billet preheat temperature is 150 DEG C, and mold temperature is 150 DEG C, and extrusion ratio is 2, in extrusion process, extrusion speed is 1mm/s;
Step 5, the steel bimetal copper-steel composite obtained is put into annealing furnace carry out the process of extruding after annealing, annealing temperature is 350 DEG C, and annealing time is 10min.
Find after testing not occur the defect such as oxide slag inclusion, air-breathing, hot tearing at calmodulin binding domain CaM; There is no obvious interface between two kinds of steel, define metallurgical binding, utilize surface protection zinc layers well to solve a difficult problem for oxide-film obstruction metallurgical binding formation as seen.After testing, steel bimetal copper-steel composite materials property is good, and shear strength is 200MPa.
embodiment 6
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, comprises the steps:
Step one, carry out galvanizing by dipping surface treatment to the preset material of solid-state 304 stainless steel to be connected, zinc coating thickness is 50 μm;
Step 2, solid-state 304 stainless steels after surface treatment are preset at desired location in mold cavity;
Step 3, melt 16MnL Hi-Stren steel pour in mold cavity in resistance furnace, utilize the processing technology of extrusion casint, pouring temperature is 1800 DEG C, and extrusion casint pressure is 70MPa, makes to form metallurgical binding between steel and steel;
Step 4, the 304-16MnL steel bimetal copper-steel extrusion billet obtained is carried out extruding front annealing in process, annealing temperature is 300 DEG C, annealing time is 20min, then extrusion process is proceeded, extrusion billet preheat temperature is 350 DEG C, and mold temperature is 350 DEG C, and extrusion ratio is 2, in extrusion process, extrusion speed is 30mm/s;
Step 5, the steel bimetal copper-steel composite obtained is put into annealing furnace carry out the process of extruding after annealing, annealing temperature is 200 DEG C, and annealing time is 5min.
Find after testing not occur the defect such as oxide slag inclusion, air-breathing, hot tearing at calmodulin binding domain CaM; There is no obvious interface between two kinds of steel, define metallurgical binding, utilize surface protection zinc layers well to solve a difficult problem for oxide-film obstruction metallurgical binding formation as seen.After testing, steel bimetal copper-steel composite materials property is good, and shear strength is 160MPa.
comparative example 1
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, 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, hot tearing 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, steel Al bimetal composite materials property is poor, and shear strength is about 10MPa.
comparative example 2
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, and technical scheme is identical with embodiment 1, and difference does not carry out extrusion process after being only solid-liquid composite casting.
Find after testing not occur the defect such as oxide slag inclusion, pore, 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, steel Al bimetal composite materials property is poor, and shear strength is about 25MPa.
comparative example 3
The present embodiment relates to a kind of solid-state steel solid-liquid composite casting and extruding group technology prepares the method for double metallic composite material, technical scheme is identical with embodiment 1, difference be only extrusion billet be without solid-liquid composite casting connect aluminium and zinc material, mechanical split carries out extrusion process together.
Find after testing not occur the defect such as oxide slag inclusion, pore, 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, steel magnesium double metallic composite material mechanical property is poor, and shear strength is 16MPa.
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. a method for double metallic composite material is prepared in solid-state steel solid-liquid compound and extruding combination, and it is characterized in that, described method comprises solid-liquid composite casting and prepares the step of Thermometal extrusion blank, extrudes the step of described Slug preparing double metallic composite material.
2. the method for double metallic composite material is prepared in solid-state steel solid-liquid compound according to claim 1 and extruding combination, and it is characterized in that, the step that solid-liquid composite casting prepares Thermometal extrusion blank specifically comprises:
Process preset: surface treatment is carried out to the preset material of solid steel 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 Thermometal extrusion blank.
3. the method for double metallic composite material is prepared in solid-state steel solid-liquid compound according to claim 2 and extruding combination, and it is characterized in that, process in preset step, described surface treatment specifically refers to zinc-plated protective layer.
4. the method for double metallic composite material is prepared in solid-state steel solid-liquid compound according to claim 2 and extruding combination, and it is characterized in that, in the step that casting combines, described mould material comprises the metal or alloy of fusing point less than or equal to solid steel material.
5. the method for double metallic composite material is prepared in solid-state steel solid-liquid compound according to claim 2 and extruding 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, centrifugal casting; Described pouring temperature is 450 ~ 1800 DEG C.
6. the method for double metallic composite material is prepared in solid-state steel solid-liquid compound according to claim 1 and extruding combination, it is characterized in that, extrude in the step of described Slug preparing double metallic composite material, the preheat temperature of Thermometal extrusion blank is below 100 ~ mould material fusing point 100 DEG C, the temperature of extrusion die is below 100 ~ mould material fusing point 100 DEG C, extrusion ratio is 2 ~ 100, and extrusion speed is 1 ~ 50mm/s.
7. the method for double metallic composite material is prepared in the solid-state steel solid-liquid compound according to claim 1 or 6 and extruding combination, it is characterized in that, the step extruding described Slug preparing double metallic composite material also comprises the step of after extrusion composite being carried out to annealing in process.
8. the method for double metallic composite material is prepared in solid-state steel solid-liquid compound according to claim 7 and extruding 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 steel solid-liquid compound according to claim 1 or 6 and extruding combination, it is characterized in that, the step extruding described Slug preparing double metallic composite material also comprises the step of before extrusion blank being carried out to annealing in process.
10. the method for double metallic composite material is prepared in solid-state steel solid-liquid compound according to claim 9 and extruding combination, it is characterized in that, the temperature of described annealing in process is below 100 ~ mould material fusing point 100 DEG C, the time is 0 ~ 300min.
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