WO2000051765A1 - Procede d'obtention d'un composite matriciel de metal poreux utilisant des billes ceramiques creuses - Google Patents

Procede d'obtention d'un composite matriciel de metal poreux utilisant des billes ceramiques creuses Download PDF

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Publication number
WO2000051765A1
WO2000051765A1 PCT/CN1999/000023 CN9900023W WO0051765A1 WO 2000051765 A1 WO2000051765 A1 WO 2000051765A1 CN 9900023 W CN9900023 W CN 9900023W WO 0051765 A1 WO0051765 A1 WO 0051765A1
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WO
WIPO (PCT)
Prior art keywords
sponge
shape
metal material
hollow ceramic
ceramic balls
Prior art date
Application number
PCT/CN1999/000023
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English (en)
Chinese (zh)
Inventor
Shaochien Tseng
Original Assignee
Shaochien Tseng
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 Shaochien Tseng filed Critical Shaochien Tseng
Priority to PCT/CN1999/000023 priority Critical patent/WO2000051765A1/fr
Priority to AU32447/99A priority patent/AU3244799A/en
Publication of WO2000051765A1 publication Critical patent/WO2000051765A1/fr

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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
    • B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form

Definitions

  • the invention relates to a method for manufacturing a sponge-like metal material capable of controlling a pore shape and a pore size structure, and in particular, to a method for manufacturing a metal material having a porous sponge structure, and the metal physical and mechanical characteristics of the sponge structure can be changed by using the manufacturing method. And material, and control the size and shape of the pores of the structure after molding, so as to obtain the control of single or composite characteristics such as the specific gravity, density, strength, toughness, fire resistance, sound insulation, heat insulation, or electromagnetic interference prevention, to facilitate supply Used as a special metal structure material. Background technique
  • the structure of metal materials into a sponge shape mainly uses aluminum as the metal material, and uses aluminum to have light weight and excellent heat dissipation characteristics, so as to facilitate the casting of aluminum into a porous structure.
  • Foam-like aluminum plate ALUMINUM POROUS BOARD, abbreviated as AP plate
  • the structure of the plate body is composed of a thin aluminum oxide film and many bubbles, so these bubble structures can be used to block the conduction of sound insulation sources, sound waves and electromagnetic waves, etc. It can also improve the original light weight and good heat dissipation characteristics of aluminum, so that it becomes light and has good fire resistance, heat dissipation, sound insulation, and electromagnetic wave interference prevention characteristics.
  • the known casting technology of the porous aluminum alloy plate is still not ideal because it is difficult to control the size, shape volume, strength and density of the pore forming portions in the tissue, and it can only produce aluminum plate foam with a small unit area.
  • Organization so that the effectiveness of the foamed aluminum sheet made of water resistance, sound insulation, heat insulation and electromagnetic wave is limited, and it is difficult to improve it; at the same time, the known foamed aluminum sheet must rely on extremely high costs when manufacturing
  • the continuous casting foaming equipment is also a very troublesome technical obstacle, and the size, density and independence of the cell pores of each unit after making a porous structure are difficult to control, so its physical and mechanical properties are not good. Its disadvantages.
  • porous (such as non-independent foam or sponge) aluminum plates is not suitable for general implementation on other alloy materials, and in addition to porous aluminum plates, currently includes other high melting point alloys and low Metal materials such as melting point alloys have never seen the technology of making porous sponge structure, which is a pity, because in addition to aluminum, if the original physical and mechanical properties of other metal materials can be borrowed, they will also be made porous.
  • the sponge-like (or independent bubble) tissue-like shape will obtain single or composite effects such as reducing the proportion of the original material, increasing the compressive strength of the tissue, fire resistance, sound insulation, heat insulation, and protection against electromagnetic interference.
  • this technology has not yet Asked by the market. Summary of the invention
  • the purpose of the present invention is to provide a sponge-like metal material manufacturing method capable of controlling pore shape and pore size structure.
  • the method includes selecting a metal material for making a sponge structure, and controlling the size and shape of the pore portion of the formed structure, thereby achieving a reduction in the specific gravity of the tissue structure. Control the porous density of the tissue, in order to increase the control of single or composite characteristics such as compressive strength, fire resistance, sound insulation, heat insulation or electromagnetic interference prevention of the tissue,
  • the present invention must first select the blank and the metal melt according to the size and shape of the pores in the sponge-like porous tissue to be made, and the properties of the metal material to be made. Liquid, optional refractory mud, etc., and then let the billet go through the steps of dipping, drying, sintering, laminating, preheating and low-pressure casting;
  • the shape and volume of the blank are the shape and shape of the hollow units in the hollow unit after the sponge tissue is made.
  • the size of the volume; the tissue arrangement and its density relative to the porous distribution in the sponge tissue are controlled by the polymerization method in the lamination step.
  • the number and proportion of hollow ceramic balls of a predetermined shape with large, medium and small volumes are directly selected and pre-mixed. It is uniform, and then it is placed in the cavity of the low-pressure casting equipment and pre-heated to obtain the desired porous distribution structure arrangement and its density. Then low-pressure casting is performed to polymerize the hollow ceramic balls with porous distribution. Is one of the methods; or using viscous organic starch, wax for precision casting, resin or organic colloidal material as a styling agent, and controlling its viscosity, first polymerize the predetermined mixture that has been previously stirred and mixed uniformly.
  • the shape and number of large, medium and small volumes of hollow ceramic balls make the polymerization density between ceramic balls under control, and then use the mold frame to laminate, and dry the styling agent distributed in the space between the hollow ceramic balls to form a shape.
  • the pieces are in order to obtain the porous arrangement structure and its density, and then the pieces are dried and placed in the low-pressure casting equipment for preheating.
  • the compressive, flexural, and flexural strength of the porous sponge structure are the thickness of the spherical shell of each hollow ceramic ball unit (i.e., the raw material is dried and sintered with the pulp dipped in the pulp).
  • the thickness of the refractory layer to be formed later), the shape of each hollow ceramic ball unit body, and the organization arrangement form and density are effectively controlled.
  • FIG. 1 is a main flow chart of manufacturing hollow ceramic balls disclosed by the present invention
  • FIG. 2 is a schematic view of a group of green stocks composed of three different granular round green stocks exemplified in the present invention
  • FIG. 3 is a graph showing thermal expansion characteristics of various refractory materials
  • FIG. 4 is a cross-sectional view of a refractory layer formed on the periphery of a blank according to the present invention.
  • FIG. 5 is a sectional view of a hollow ceramic ball unit according to the present invention.
  • Fig. 6 is a schematic diagram of a ceramic ball group composed of three types of hollow ceramic balls according to the present invention
  • Figure 7 The present invention is a combination of various required numbers, shapes, and volumes of hollow ceramic balls in advance Enlarged sectional view of uniform mixing;
  • FIG. 8 is a flowchart of an indirect lamination method disclosed by the present invention.
  • FIG. 9 is a cross-sectional view of a method for manufacturing a molded prototype using a mold frame in an indirect lamination method disclosed in the present invention
  • FIG. 10 is a partially enlarged cross-sectional view of a molded cone of the present invention
  • Figure U A partially enlarged schematic view of the molten metal of the present invention being loaded into a tissue gap
  • Fig. 12 is a schematic perspective view of a finished sponge-like metal material with a circular hole part according to the present invention
  • Fig. 13 is a partially enlarged sectional view of a finished sponge-like metal material with a hexagonal crystal hole part according to the present invention
  • FIG. 14 is a partially enlarged sectional view of a finished sponge-like metal material with an oval hole portion according to the present invention
  • FIG. 15 is a partially enlarged sectional view of a composite implementation of a multilayer sponge-like metal material and a ductile material according to the present invention Illustration.
  • a sponge-like metal material manufacturing method capable of controlling pore shape and pore size mainly includes selecting a blank material 1, selecting a metal melt 2, and selecting a refractory mud paddle 3. After that, the steps of sticky paddle 4, drying 5, sintering 6, lamination 7, preheating 8, and low-pressure casting 9 are performed to complete the method for manufacturing the finished sponge-like metal material 10; wherein:
  • the principle is to use organic matter as the blank 1, for example, thermoplastic plastic granules, hard wax, or organic plant seeds or starch granules are used as the organic blank 1.
  • the shape of these organic blanks 1 can be selected or made into a round granular shape, an oval granular shape, a hexagonal grain shape, or other desired shapes of the hollow pores required to be formed in the formed tissue, so as to facilitate the formation of the sponge tissue. After that, the overall sound insulation, thermal insulation, fire prevention and electromagnetic wave interference prevention effects are obtained.
  • the organic material such as rice, beans, etc. of plant seeds, or pre-molded plastic particles or wax particles, etc.
  • the organic material is selected or made into organic materials with round or oval grains.
  • sponge tissue Better sound insulation, heat insulation, fire prevention and electromagnetic wave interference prevention effects can be obtained; in other words, hexagonal grain-shaped organic matter can also be produced (the plastic injection molding or casting wax molding technology can be used to obtain hexagonal grain-shaped plastic particles or Wax particles)
  • the embryo material 1 after making the sponge tissue, the overall compressive, flexural, or flexural strength of the sponge tissue can be greatly increased; in the meantime, it is necessary to cooperate with the implementation of the laminated layer 7 described later to obtain In order to effectively implement the effects of sound insulation, heat insulation, fire prevention and electromagnetic wave interference, and to improve the strength of compression, bending or bending, it is necessary to control the morphology and density of the sponge tissue, and use low-pressure casting of suitable metal melts. Demand.
  • a round granular hard wax is selected as the organic material 1 and the additional description is as follows:
  • the organic material 1 can be classified into three types: large grain 1 1, medium grain 12 and small grain 13, and each of them is aggregated into a certain number of proportions.
  • large grain 1 1, medium grain 12 and small grain 13 are aggregated into a certain number of proportions.
  • slurry 4 to sintering 6 to make round hollow ceramic balls in order to form a group of blanks (shown in Figure 2), in the process of dipping slurry 4 to sintering 6 to make round hollow ceramic balls (detailed later), they must be independently produced according to size and volume classification.
  • the metal melt 2 and the optional refractory mud 3 In the process of selecting the metal melt 2 and the optional refractory mud 3, it can be divided into the use of high melting point alloy 21 type metal melt, the A type of refractory mud 3 1 must be selected, or the low melting point alloy 22 type is used. In the case of molten metal, the B-type refractory mud 32 (as shown in Figure 1) must be selected; these refractory muds 3 must have the following conditions:
  • Table 1 is a comparison table of powder proportions and temperature resistance characteristics of various refractory mud ingredients disclosed in the present invention.
  • the binder 33 used in the present invention tends to use a silicone liquid that is easy to obtain and easy to use because the silicone liquid has been used in precision casting for many years. It can be easily purchased on the market.
  • the chemical properties of the silicone liquid are very stable. It will not be destroyed unless it is stored in an environment below the freezing point.
  • the silica gel liquid is extremely stable in storage and use, which is the main reason for using the silica gel liquid as the binder 33 in the present invention.
  • the composition type of the A-type refractory mud 31 can be selected and obtained from the following table 2:
  • Table 2 Composition and properties of Class A refractory mud 31.
  • the composition of the B-type refractory mud 32 may be selected from the gypsum-based refractory material, that is, the gypsum itself has two molecules of crystal water (CaSO 4 ⁇ 2H 2 0), if used as a refractory, depending on the working time and solidification time, remove a part of the water in the gypsum, the remaining water is between 1 -1% molecules [CaSO 4 ⁇ (1- 1) ⁇ 2 ⁇ ] becomes cooked gypsum, which can be prepared by adding water when used, and is usually available on the market.
  • the gypsum-based refractory material that is, the gypsum itself has two molecules of crystal water (CaSO 4 ⁇ 2H 2 0)
  • the remaining water is between 1 -1% molecules [CaSO 4 ⁇ (1- 1) ⁇ 2 ⁇ ] becomes cooked gypsum, which can be prepared by adding water when used, and is usually available on the market.
  • the appropriate refractory slurry 3 is selected, which belongs to the high melting point alloy 21.
  • the selected type A refractory slurry 3 1 must be prepared as follows:
  • Viscosity control of mud Generally, two types of Zhan Cup (2 & 1 1 (: () 4 # and 5 # are used. When using Zhan Cup 5 # for preparation, the viscosity is obtained in 9-30 seconds. More suitable (coordinated in Table 2), c.
  • Wetting agent 34 is a kind of surfactant. The main purpose of adding wetting agent 34 to A type of refractory mud 3 1 is to make the mud more easily adhere to plastic pellets and wax. Granules, organic starch or plant seeds on the blank 1. Generally, when ethyl silicate is used as the binder 33, it is not necessary to add a wetting agent 34 because of its good wettability.
  • polyvinyl acetate used to improve the wet strength of Type A refractory mud 31; and when wax particles are used as the raw material 1 and the slime 4 is used, the polyvinyl acetate can prevent dewaxing Occurred; at the same time, when sintering 6, polyvinyl acetate can prevent the plastic pellets 1 from cracking; and after sintering 6, it has the effect of removing organic matter in the refractory layer 50.
  • the size and volume of the selected organic embryo material 1 must be separately classified for the operation of dipping slurry 4, and then dried at a temperature of 130'C ⁇ 20'C5 to promote each embryo.
  • a hardened refractory layer 50 is formed on the periphery of the material 1 (as shown in Fig. 4), and then the rotary furnace sintering method 6 is used to carbonize and burn the organic blank 1 in the refractory layer 50 at a temperature of 800'C-1800'C.
  • a hollow ceramic ball 14 with a hole portion 19 as shown in FIG. 5).
  • the various shapes and sizes of the organic blanks 1 are classified into different shapes, sizes, and sizes after the processes of dipping 4, drying 5, and sintering 6, etc.
  • the ceramic balls 15, 16 and 17 (shown in FIG. 6) are prepared for the subsequent 7 steps of lamination.
  • the direct stacking layering method is to mix various required quantities, shapes, and volumes of hollow ceramic balls 15, 16, and 17 into a homogeneous group (as shown in FIG. 7), and directly place them In the mold cavity 91 of the equipment used in the low-pressure casting 9, the hollow ceramic balls 15, 16 and 17 which have been mixed uniformly can be directly stacked and laminated according to the required organizational arrangement form and distributed mass density form.
  • a spongy tissue prototype is formed, and the gap 18 formed after stacking is used as a flow channel for the subsequent low-pressure casting metal melt 2 (as shown in FIG. 7).
  • the indirect layering method (shown in Figure 8) requires the use of a viscous styling agent 72 to stir and polymerize the hollow ceramic balls that have been mixed uniformly according to the required number, shape and volume proportion.
  • Groups 16 and 17 are poured into the mold frame 73 of the desired shape (as shown in Figure 9), and dried at room temperature or given a lukewarm 74.
  • the adhesion between the hollow ceramic balls 15, 16 and 17 The thick styling agent 72 is used to facilitate taking out a molding prototype 75 made of a sponge-like structure from the mold frame 73 (as shown in FIG. 10).
  • the setting agent 72 is used to control the tissue density in the hollow ceramic ball group, and to accept gold It belongs to the instant polymerization strength of each hollow ceramic ball unit body when the molten 2 is cast.
  • the viscous styling agent 72 is prepared by using raw materials such as precision casting wax, organic starch, organic gum or resin.
  • the low-pressure casting 9 equipment with constant temperature heating capability can be used to perform the pre-heating 8 and the casting of the molten metal 2 in advance. among them:
  • the group of sponge-like hollow ceramic balls organized by the direct stacking method is directly stacked and formed in the mold cavity 91 of the equipment, so the sponge-shaped hollow ceramics must be preheated in the mold cavity 91 first.
  • a ball organization group so that when the molten metal 2 is cast, it can increase the fluidity of the molten metal 2 between the gaps 18; then, using the pressure plate 92, the previously formulated high melting point alloy 2 1 or low melting point is used.
  • the molten metal 2 made of the alloy 22 is cast into the cavity 91 and exhausted smoothly, so that the molten metal 2 can be smoothly injected into the stacking gap 18 (as shown in FIG. 11) so as to inject these sponge tissues.
  • Shaped hollow ceramic ball groups are fused and shaped to produce a sponge-shaped metal material finished product 10 made of hollow ceramic balls 15, 16 and 17 with circular holes 19 (as shown in FIG. 12). .
  • the sponge tissue-shaped molding 75 made by the indirect stacking method is directly placed in the cavity 91 of the equipment for low-pressure casting 9 to preheat 8 first, and then the pressure plate 92 is used to adapt the above-mentioned requirements.
  • the molten metal 2 is cast into the sponge-shaped molding 75, which promotes the dry and solid shape setting agent 72 between the hollow ceramic balls 15, 16, and 17, which are carbonized and lost by the molten metal, At the moment of loss, the molten metal 2 is immediately filled in the space of the gap 18, and a sponge-like metal material finished product 10 whose tissue density and strength can be effectively controlled can also be produced (as shown in FIG. 12). In the meantime:
  • the mold cavity 91 in the low-pressure casting 9 equipment with constant temperature heating capacity is used, and the pre-heating 8 should be directly stacked in the mold cavity 91 to complete the sponge-shaped hollow ceramic ball structure.
  • the aunt group, or the pre-heating 8 of the sponge tissue-shaped molding 75 made in the cavity 91 is a very necessary procedure, because the pre-heating 8 is beneficial to increase the molten metal 2 in the casting gap 1 8 The fluidity during the process, especially when the low-melting alloy 22 is used as the molten metal 2.
  • the present invention uses or uses elliptical granular (or other object-shaped) organic matter as the embryo 1, it is also possible to use the above-mentioned selection of metal melt 2, selection of refractory slurry 3, dipping slurry 4, drying 5, Steps of sintering 6, lamination 7, preheating 8 and low-pressure casting 9 promote the finished sponge-like metal material 10b
  • the hollow pore-shaped structure has an oval hole portion 19b (as shown in FIG. 14) or other predetermined shapes showing the original shape of the blank, in order to improve the strength, sound insulation, heat insulation, fire prevention and electromagnetic interference prevention of the metal sponge structure. Effect.
  • the stacking direction of the hollow ceramic balls can be changed in the control of the layer 7 to In addition to controlling the shape and density of the hole portion, the direction of the hole portion formation can also be controlled.
  • the stacking direction of the hollow ceramic balls can be changed in the control of the layer 7 to In addition to controlling the shape and density of the hole portion, the direction of the hole portion formation can also be controlled.
  • various sponge-like metal material finished products 10, 10a, and 10b having circular, hexagonal crystal shapes, and elliptical hole portions 19, 19a, and 19b produced by the above-mentioned manufacturing method of the present invention can be glue-combined with each other.
  • Multi-layered splint structure (as shown in Figure 15), and between the interlayers can be combined with one or more layers of tough material 93 (such as carbon fiber cloth, metal plywood, or metal mesh, etc.) as required. So that it can be used in accordance with various single or composite characteristics such as compression resistance, toughness, fire resistance, sound insulation, heat insulation and electromagnetic wave interference prevention.
  • the method for manufacturing a sponge-like metal material capable of controlling the pore shape and the pore size structure is to solve the problem of controlling the density and strength of the sponge structure by using a molding technique for manufacturing hollow ceramic balls, and Porous tissue has thermal insulation (ie, fire resistance), sound insulation, and anti-electromagnetic wave effects, and can also change the metal material of the sponge tissue. Therefore, it should be equipped with a high level of technological value, so it filed an application for an invention patent.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

L'invention concerne un procédé d'obtention d'un composite de métal poreux par une opération de coulée autour de billes céramiques creuses superposées que l'on obtient en revêtant des modèles de billes organiques avec une suspension réfractaire, en séchant les modèles, en les frittant et en les éliminer. Grâce à la variation du calibre, du matériau de revêtement et de la disposition des billes céramiques creuses, on obtient différents types de composites de métaux poreux.
PCT/CN1999/000023 1999-03-01 1999-03-01 Procede d'obtention d'un composite matriciel de metal poreux utilisant des billes ceramiques creuses WO2000051765A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN1999/000023 WO2000051765A1 (fr) 1999-03-01 1999-03-01 Procede d'obtention d'un composite matriciel de metal poreux utilisant des billes ceramiques creuses
AU32447/99A AU3244799A (en) 1999-03-01 1999-03-01 Process of producing a porous metal matrix composite using hollow ceramic balls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN1999/000023 WO2000051765A1 (fr) 1999-03-01 1999-03-01 Procede d'obtention d'un composite matriciel de metal poreux utilisant des billes ceramiques creuses

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WO2000051765A1 true WO2000051765A1 (fr) 2000-09-08

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63312931A (ja) * 1987-06-15 1988-12-21 Honda Motor Co Ltd セラミック−金属複合体の製造方法
JPS6471563A (en) * 1987-09-11 1989-03-16 Daihatsu Motor Co Ltd Ceramic-metal composing body
WO1995025078A1 (fr) * 1994-03-16 1995-09-21 The Dow Chemical Company Composites ceramique-metal conformes
JPH08215828A (ja) * 1995-02-10 1996-08-27 Ngk Insulators Ltd 複合鋳造体及びその製造方法
GB2320727A (en) * 1996-12-24 1998-07-01 Honda Motor Co Ltd Method of manufacturing a metal-ceramic composite material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63312931A (ja) * 1987-06-15 1988-12-21 Honda Motor Co Ltd セラミック−金属複合体の製造方法
JPS6471563A (en) * 1987-09-11 1989-03-16 Daihatsu Motor Co Ltd Ceramic-metal composing body
WO1995025078A1 (fr) * 1994-03-16 1995-09-21 The Dow Chemical Company Composites ceramique-metal conformes
JPH08215828A (ja) * 1995-02-10 1996-08-27 Ngk Insulators Ltd 複合鋳造体及びその製造方法
GB2320727A (en) * 1996-12-24 1998-07-01 Honda Motor Co Ltd Method of manufacturing a metal-ceramic composite material

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