CN102470440A - Process for production of metal-foam bodies integrated in housings - Google Patents

Process for production of metal-foam bodies integrated in housings Download PDF

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Publication number
CN102470440A
CN102470440A CN2010800338338A CN201080033833A CN102470440A CN 102470440 A CN102470440 A CN 102470440A CN 2010800338338 A CN2010800338338 A CN 2010800338338A CN 201080033833 A CN201080033833 A CN 201080033833A CN 102470440 A CN102470440 A CN 102470440A
Authority
CN
China
Prior art keywords
metal foam
housing
metal
foam body
aforementioned
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010800338338A
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Chinese (zh)
Inventor
T·布卢梅
S·布罗伊蒂加姆
F·雷宁
E·策因
H·施塔德斯加尔德
S·弗勒利希
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alantum GmbH and Co KG
Alantum Corp
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Alantum GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alantum GmbH and Co KG filed Critical Alantum GmbH and Co KG
Publication of CN102470440A publication Critical patent/CN102470440A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/11Making porous workpieces or articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0244Powders, particles or spheres; Preforms made therefrom
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/002Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
    • B22F7/004Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part
    • B22F7/006Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part the porous part being obtained by foaming
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • B22F7/04Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24Selection of soldering or welding materials proper
    • B23K35/28Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286Al as the principal constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24Selection of soldering or welding materials proper
    • B23K35/30Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3033Ni as the principal constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24Selection of soldering or welding materials proper
    • B23K35/30Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053Fe as the principal constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making non-ferrous alloys
    • C22C1/08Alloys with open or closed pores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/04Tubular or hollow articles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

A process for the production of a metal-foam body integrated in a housing is provided, which includes the following steps: the provision of a housing (30a, 30b); the provision of at least one layer of a lamellar metal foam (10); the application of a binding agent and a metal powder to the metal foam and/or to the inner wall of the housing (10); the forming of a metal- foam body (20a, 20b) from the at least one layer of metal foam (10), with the result that the metal-foam body (20a, 20b) has a base surface A that is dimensioned such that the metal-foam body (20a, 20b), when it is inserted into the housing (30a, 30b), touches an inner wall of the housing (10) at several points; the introduction of the metal-foam body (20a, 20b) into the housing (30a, 30b); and the heating of the housing (10) and the inserted metal foam (20a, 20b) to a temperature Ts =1,0000 DEG C.; A metal-foam body integrated in a housing is also given.

Description

Be used for making the method for the metal foam body that is integrated in housing
Technical field
The present invention relates to a kind ofly be used for making the method for the metal foam body that is integrated in housing and be integrated in the metal foam body in the housing.
Background technology
The various application needs of metal foam in industry (for example auto industry) are integrated in the metal foam element in the housing securely.The instance of this type of application is catalyst, filter, agitator or the heat exchanger based on metal foam.Usually,, at first metal foam body is configured as the moulded parts finished product, inserts housing then and be soldered to housing in order to make the housing that this type of has metal foam body.
Perhaps, also can be with fiber mat (ceramic fibre) as the supporting member between housing and the molding.Yet the shortcoming of these connectors is that it is very responsive to temperature, and this can cause variety of issue when metal foam body (for example is used as the catalyst of engine nearside) in the high temperature range of application.If the use fiber mat, then it can produce extra cost.In addition, because this fibrid has carcinogenic character, so it can impair health when getting into the human lung.
In the manufacture process of actual metal foams, carry out sintering process usually, this sintering process produces required surface texture and anti-mechanicalness and the hear resistance of each application.This sintering process is carried out after metal foam body forms and hardens usually immediately.
A kind of method that is used to make metal/metal foam composite component is disclosed among DE 101 27 716A1.According to the method, smooth or molded metal parts is inserted in the cavity of mold, wherein said cavity part is at least defined by metal parts.
Then will be at room temperature insert cavity and form foam therein for the mixture of the motlten metal of solid and propellant.
Yet the method is incompatible with some metal foam manufacturing approach, particularly with wherein at first make the molding of processing by polyurethane foam, apply with metal level then, the metal foam manufacturing approach of burn off polyurethane foam is incompatible then.
Summary of the invention
Technical problem
The method is incompatible with some metal foam manufacturing approach, particularly with wherein at first make the molding of processing by polyurethane foam, apply with metal level then, the metal foam manufacturing approach of burn off polyurethane foam is incompatible then.
Technical scheme
Therefore, the purpose of this invention is to provide a kind of method that is used for making the metal foam body that is integrated in housing, wherein the shortcoming of described prior art can be able to avoid.
In addition, an object of the present invention is to provide the metal foam body that is integrated in the housing.
These purposes can be according to the present invention, realize through method according to claim 1 and metal foam body according to claim 11.Preferred embodiment provides in the dependent claims.
According to embodiment of the present invention, a kind of method that is used for making the metal foam body that is integrated in housing comprises the following steps:
-housing is provided;
-at least one sheet metal froth bed is provided;
-binding agent and metal dust are applied to the inwall of said metal foam and/or said housing;
-form metal foam body by said at least one metal foam layers, thus metal foam body has basal plane A, and the size of this basal plane A is set when making said metal foam body in being inserted into said housing the inwall that contacts said housing at the some spots place;
-said metal foam body is introduced in the said housing; With
-metal foam of said housing and insertion is heated to temperature T S=1,000 ℃.
Metal dust is so-called " sintered powder ", and it is used to give metal foam temperature tolerance and enough surface texture roughness.According to embodiment of the present invention, metal dust and metal foam are sintered to each other step simultaneously be used for firmly being connected forming between metal foam body and the housing, so that metal foam body is integrated in the housing.
Because for the requisite high temperature of sintering circuit, so during heating form metal foam body and being fixedly connected between the housing on every side simultaneously.The verified adhesion that is formed in this way between metal foam body and the housing for example also can stand the high temperature that occurs near motor vehicle engine.Therefore, the metal foam body of making according to the method described above that is integrated in the housing also can be used as the catalyst in the engine proximal region.
Term " sheet metal foam " in the scope of embodiment of the present invention, be meant thickness between 0.5 and 10mm between flexible or inflexibility planar structure.This type of sheet metal foam also is called " sheet material ".In order to make this type of sheet metal froth bed, can use the method for for example wherein at first making the froth bed of processing by polyurethane or similar plastics.For example metal level is applied on the plastic foam then through so-called " slurry process (slurry process) " or through electro-deposition.Like this, behind the burn off plastics, form the thin metal foam sheet material that can be used for embodiment of the present invention.
To approach the metal foam sheet material and in subsequent process steps, further be processed into metal foam body.In principle, this can carry out in many ways.A kind of possibility of being made foams by the metal foam sheet material is the top that one deck of sheet material is stacked on another layer.In this case, for example the basal plane with each metal foam sheet material is corresponding for the basal plane A of metal foam body to be produced.This means the metal foam body finished product is inserted in the housing vertical with the basal plane of each sheet material.
In an alternate embodiment, can produce metal foam body through at least one sheet metal froth bed of reeling.Like this, produce cylindrical or oval metal foam body, its basal plane A is circular or ellipse.
The size of the basal plane A of metal foam body is set and is made metal foam body contact the inwall of housing along its periphery in the some spots place.(in other words this size that can be for example has identical shaped metal foam body and cavity and foams through the cavity that is limited with housing matees basically; In several microns or several centimetres) realize, thus metal foam body is at the inwall of its outer circumference contact housing.Preferably, metal foam body longitudinal direction L along housing on its whole neighboring contacts inwall.
Binding agent and metal dust can be for example apply or form that also can mixture applies simultaneously with this order in succession.
According to alternate embodiment of the present invention, the step that applies binding agent and metal dust comprises on the inwall that makes its mixture be attached to tubular shell, then metal foam body is pushed in the housing.This means that housing (in other words, when inner walls can freely be passed through) before metal foam body being introduced sintering and bonding operation just prepares.In addition, as stated, also can mixture be applied to metal foam before introducing metal shell.In this regard, should notice that wording then used herein " introducing " can mean and for example insert housing if housing is a tubular shell.Perhaps, for example, if this housing is made up of some shells (like two half-shells), then this wording can mean foams is placed housing.
Metal dust can be for example be contained in the mixture with the ratio of about 10 weight % to 80 weight %.If form in said scope, then on the one hand, guarantee to be used to be deposited on the d spiss of lip-deep mixture, on the other hand, two kinds of component concentrations should be high enough to guarantee sintering process and the process that is connected with housing with enough intensity.According to a kind of modification, the mixture that is applied to enclosure interior can have different compositions with the mixture that is applied to the metal foam sheet material.Particularly, aforementioned mixture can comprise the binding agent of higher proportion, then states the metallic particles that mixture comprises higher proportion.
Metal dust can comprise in the following metal at least two kinds as alloy: iron, chromium, al and ni.The sintering of said metal alloy has guaranteed to have heat-resisting quantity with these material sintering metal foam together, thereby the metal foam body of making that is integrated in the housing can be for example as the catalyst in the high temperature range.
Mixture is preferably shaped to cementitious compositions.This means that mixture exists to have full-bodied liquid form.Avoided mixture vertically dripping or loss on the surface like this, to the full extent.In addition, this type of pasty mixture is easy to deposition.
Temperature T S can be for example between 1,100 ℃ and 1,300 ℃.Different with the sintering of metal foam with wherein with the prior art that is connected with different independent step enforcement housings, for embodiment of the present invention, only need once heating, thereby especially practiced thrift energy.
This temperature preferably keeps about at least 50 minutes time period.Thereby guarantee to accomplish sintering circuit and be connected operation.
Binding agent can for example comprise following one or more components: water, wax, solvent and adhesive.
The task of binding agent is to give mixture required denseness.Binding agent should especially have following character: the high viscosity (liquid) under about 20 ℃, good dry property and avirulence.
Round tube can for example be provided as housing, and wherein metal foam body is preferably the metal foam with circle or oval basal plane A in this case.The cross section of metal foam body should be substantially the same with the internal cross section of housing.This structure is guaranteed to be easy to metal foam body is inserted in the housing, wherein, with regard to circular cross section, because the basal plane of metal foam body and housing rotation symmetry are shaped, therefore during inserting, needn't be careful the position of metal foam body in addition.Wording " substantially the same " is meant that within the scope of the invention two said cross sections differ only several millimeters, especially differ only several microns.
For the housing that adequately protects avoids stress influence, the inwall of housing is processed by high-grade steel at least.Thereby guarantee that in the processing procedure of metal foam body subsequently it is unaffected basically that the inner surface of housing keeps.Stand such as the common extreme condition that for example mainly is present near waste pipe inside on the surface of being processed by high-grade steel in addition.
Can use method manufacturing of the present invention to be integrated in the metal foam body in the housing, the inwall of metal foam body contact housing wherein at its some spots place, and wherein the metal foam of foams is fixed to the inwall of housing through sintering process.In other words, metal foam is sintered to housing at those some places of its contact housing, guaranteed the heat-resisting quantity that connects thus.
As what described, housing can be the tubular shell with circle or oval cross section.In this case, metal foam body is preferably cylinder or ellipsoid, and this cylinder or ellipsoidal outline are substantially the same with the interior profile of housing.
Metal foam body can for example be formed by iron, chromium, aluminium or nickel or its alloy.These are preferable material, especially for making catalyst, because these materials are relatively inexpensive, simultaneously the chemism environmental condition are had enough patience.
Comprise housing and the assembly that is integrated in metal foam body wherein and extreme environmental conditions is had enough patience in order to provide, preferably inner walls is processed or is applied one deck high-grade steel by high-grade steel at least.
The metal foam body that is integrated in the housing can be the metal foam body that for example is configured as filter and catalyst.This type of catalyst is usually used in the gas extraction system or filtration system of motor vehicles for example, and catalyst is exposed under the high temperature in these systems.Because said patience connects, the metal foam body (even heavily stressed following) that is integrated in the housing has long service life.
Beneficial effect
The invention provides a kind of simple and low cost method that is used for making the metal foam body that is integrated in housing.Because the connection that forms through sintering circuit between the parts, the composite component of two parts is characterised in that heat-resisting quantity.
Description of drawings
It is existing that present invention is described with reference to the accompanying drawing of representing non-limiting embodiments of the present invention.
It should be noted that in this regard the diagram in the accompanying drawing may not be drawn in proportion.On the contrary, in order to illustrate one or more details, actual ratio maybe distortion.
In the accompanying drawing that illustrates:
Fig. 1 illustrates the flow chart of the method that is used for making the metal foam body that is integrated in housing;
Fig. 2 illustrates each layer of the sheet metal foam that can use according to the embodiment of the inventive method;
Fig. 3 illustrates the difformity of the metal foam body that can use according to an embodiment of the present invention;
Fig. 4 illustrates the step of the different metal foams being inserted housing;
Fig. 5 illustrates the possible shape of the metal foam body that can form according to an embodiment of the present invention; And
Fig. 6 illustrates and can introduce the metal foam body in the housing at diverse location.
The specific embodiment
Be used for making the flow chart of exemplary of the method for the metal foam body that is integrated in housing shown in Fig. 1.This method comprises first step S10, and first step S10 comprises to be provided tubular shell and the sheet metal froth bed is provided.
In next step S20, binding agent and metal dust are applied to metal foam and/or are applied to the inwall of tubular shell.Binding agent and metal dust can successively be deposited at least one metal foam layers.Perhaps, the form of two kinds of components mixture that can before prepare applies.Can for example apply through the surface that applies each layer.Yet, also maybe one or more metal foam layers be immersed in the mixture.
Then be the step S30 that forms metal foam body by at least one metal foam layers.As what described, this can be through making layer coiling or carrying out through making several layers pile up the formation said three-dimensional body.The size of metal foam body is set and is made when it is pushed into or inserts in the housing, and it preferably contacts the inwall of housing at the some spots place on its whole neighboring.Therefore, have enough contact points or surface between metal foam body and the housing.
Adhere to the metal foam body of manufacturing in this way and the inner surface of housing if guarantee the metal dust of capacity and binding agent; Then in next step S40; Metal foam body is introduced housing, and the degree of depth is enough to make metal foam body to lean against to be its position that provides in the housing.Metal foam body preferably contacts the inwall of housing at the some spots place on its whole neighboring.
In another step S50, housing is heated to the temperature T above 1,000 ℃ with metal foam SThe sintering metal foams, and form the connection between metal foam body and the inner walls.
Can find out that from Fig. 2 metal foam layers 10 can provide by various forms.The shape of metal foam layers 10 can for example be with the rectangle shown in the reference number 10a or square, or with the circle shown in the reference number 10b or oval.Also can be shape with the ring-type fragment shown in the 10c.The existing surface that binding agent and alloy powder is applied to these metal foam layers 10a, 10b and 10c individually or with the form of mixture.
Fig. 3 illustrates by each layer 10 and forms metal foam body 20a or 20b.According to the exemplary shown in the diagram left side, metal foam body 20a is formed on the top that is stacked on another layer through the one deck with several layers 10.This diagram constitutes the side view of metallic object finished product, this means that its basal plane A is vertical with the plane of delineation.
According to being close to the alternate embodiment shown in it, also can make metal foam body 20b through metal foam layers 10 or several layers are reeled on illustrated right side.Different with last diagram, this is illustrated as the flat sided straight view of basal plane A.Therefore the metal foam body 20b that here illustrates has the elongate cylinder shape.
In each case, because be to be made up by planar metal froth bed 10 to form, so foams 20a or 20b comprise and are distributed in the inner binding agent and the mixture of metal dust (alloy powder).
Can find out that from Fig. 4 metal foam body 20a and 20b are introduced among the housing 30a and 30b of respective shapes.In the illustrated left side of Fig. 4, with side view housing 30a and the metal foam body 20a that inserts wherein are shown together once more.Can find out that metal foam body 20a is along the inwall of whole length L contact housing 30a.
On the illustrated right side of Fig. 4, the housing 30b with circular cross section corresponding with the basal plane A of metal foam body 20b is provided.The interior profile of tubular shell 30b is roughly corresponding to the outline of metal foam body 20b.Like this, guaranteed to have excellent contact between inwall and the metal foam body 20b of housing 30b.Yet the outline of metal foam body should be not greatly damage the inwall of housing or makes in being inserted into housing the time to it and must apply excessive power metal foam body is inserted the inside of housing.
Certainly, the shape of cross section of housing and metal foam body except shown in also may be selected to be for example square or rectangular cross section the shape., thereby guarantee then under the situation of given suitable dimension that the periphery of metal foam body and the inwall of housing contact with each other if the shape of cross section of housing and metal foam body corresponds to each other on the latter's whole periphery.Can place the smelting furnace (not shown) to carry out sintering process the metal foam body 20a or the assembly of 20b that comprise housing 30a or 30b and introduce respectively wherein at present.
Fig. 5 illustrates the various basal plane A of the metal foam body that can use within the scope of the invention.Can find out that owing to comprise the layer structure of platy layer, almost any basal plane all is possible, for example rectangle, circle, ellipse or triangular ellipse (tri-oval).Because the flexibility or the flexibility of metal foam layers also can be wound into metal foam body as stated.
The metal foam body 20a that is made up of several layers 10 shown in Fig. 6 is at the inner possible position of housing 30a.As shown in the figure, can insert metal foam body 20a so that layer 10 basal plane extends (left side illustrates among the figure) perpendicular to the sidewall of housing 30a, or the sidewall that makes the basal plane of layer 10 be parallel to housing 30a separately extends (right side illustrates among the figure).
The invention provides a kind of simple and low cost method that is used for making the metal foam body that is integrated in housing.Because the connection that forms through sintering circuit between the parts, the composite component of two parts is characterised in that heat-resisting quantity.

Claims (17)

1. method that is used for making the metal foam body that is integrated in housing is characterized in that:
Provide housing (30a, 30b);
At least one sheet metal froth bed (10) is provided;
Binding agent and metal dust (11) are applied to the inwall of said metal foam and/or said housing (10);
Form metal foam body (20a by said at least one metal foam layers (10); 20b), thus (20a 20b) has basal plane A to said metal foam body; The size of said basal plane A is set and is made said metal foam body (20a; 20b) be inserted into said housing (30a, 30b) in the time contact said housing (30a, inwall 30b) at the some spots place;
With said metal foam body (20a, 20b) introduce said housing (30a, 30b) in; With
(30a, 30b) (20a 20b) is heated to temperature T with the metal foam that inserts with said housing S=1,000 ℃.
2. method according to claim 1 is characterized in that, said binding agent and said metal dust are applied in succession with this order or apply simultaneously with the form of mixture.
3. method according to claim 1 and 2 is characterized in that, said metal dust is contained in the said mixture with the ratio of 10 weight % to 80 weight %.
4. according to the described method of one of aforementioned claim, it is characterized in that said metal dust comprises in the following metal at least two kinds as alloy: iron, chromium, al and ni.
5. according to the described method of one of aforementioned claim, it is characterized in that said mixture is configured as cementitious compositions.
6. according to the described method of one of aforementioned claim, it is characterized in that, below be applicable to temperature T S: 1,100 ℃≤T S≤1,300 ℃.
7. according to the described method of one of aforementioned claim, it is characterized in that, temperature T SThe time period that keeps at least 50 minutes.
8. according to the described method of one of aforementioned claim, it is characterized in that said binding agent comprises at least a following component: water, wax, solvent and adhesive.
9. according to the described method of one of aforementioned claim; It is characterized in that; Tubular shell is provided as said housing and the metal foam that will have circle or an oval basal plane A provides as said metal foam, and the cross section of wherein said metal foam is substantially the same with the interior cross section of said tubular shell.
10. according to the described method of one of aforementioned claim, it is characterized in that the inwall of said at least housing is processed by high-grade steel.
11., it is characterized in that (20a, step 20b) comprises piles up several sheet metal froth beds (10) to form said metal foam body according to the described method of one of aforementioned claim.
12., it is characterized in that (20a, step 20b) comprises makes at least one sheet metal froth bed (10) be wound into the scroll thing to form said metal foam body according to the described method of one of aforementioned claim.
13. a metal foam body that is integrated in the housing, (20a 20b) contacts the inwall of said housing to wherein said metal foam body at its some spots place, it is characterized in that, metal foam connects the inwall that is fixed to said housing through sintering.
14. metal foam body according to claim 13 is characterized in that, said housing is a tubular shell.
15., it is characterized in that it comprises iron or nickel according to claim 13 or 14 described metal foam bodies.
16., it is characterized in that the inwall of said at least housing is formed by high-grade steel according to the described metal foam body of one of claim 13 to 15.
17., it is characterized in that (20a 20b) is filter or catalyst to said metal foam body according to the described metal foam body of one of claim 13 to 16.
CN2010800338338A 2009-07-23 2010-07-21 Process for production of metal-foam bodies integrated in housings Pending CN102470440A (en)

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