WO2001048266A1 - Procede de preparation de revetement composite - Google Patents

Procede de preparation de revetement composite Download PDF

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Publication number
WO2001048266A1
WO2001048266A1 PCT/CN2000/000572 CN0000572W WO0148266A1 WO 2001048266 A1 WO2001048266 A1 WO 2001048266A1 CN 0000572 W CN0000572 W CN 0000572W WO 0148266 A1 WO0148266 A1 WO 0148266A1
Authority
WO
WIPO (PCT)
Prior art keywords
mesh
workpiece
dispersed particles
metal
composite coating
Prior art date
Application number
PCT/CN2000/000572
Other languages
English (en)
Chinese (zh)
Inventor
Xiumei Pang
Hongjian Tan
Original Assignee
Xiumei Pang
Hongjian Tan
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 Xiumei Pang, Hongjian Tan filed Critical Xiumei Pang
Priority to AU19845/01A priority Critical patent/AU1984501A/en
Publication of WO2001048266A1 publication Critical patent/WO2001048266A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C6/00—Coating by casting molten material on the substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles

Definitions

  • the invention relates to a method for preparing a composite coating.
  • Composite coatings are generally composed of a metal matrix phase and dispersed phases such as non-metallic solid particles, short fibers, and cermets.
  • the dispersion in the composite coating plays an important role in obtaining special properties of the coating.
  • laser and electron beam remelting methods can be used to prepare Ni-based and Co-based coatings reinforced by VC and MoC dispersed phases.
  • the main preparation methods of composite coatings include composite plating, gradient coating, and composite brazing coating. Among them, the composite brazing coating currently uses a metal process wall method or a metal powder flexible cloth method. These methods have complex preparation processes and do not meet the general needs of composite coatings in industrial applications.
  • the purpose of the present invention is to solve the above-mentioned problems existing in the prior art, and to provide a simple method for preparing a composite coating, so that the preparation and coating process of the composite coating becomes simple, is convenient for mass production, and can satisfy industrial applications. Universal requirements.
  • the present invention provides a method for preparing a composite coating, including the following steps: a. Cleaning the surface of a workpiece as a metal substrate; b. Providing a metal wire mesh, a ceramic mesh shell or a sponge foam Net structure such as c; cover the workpiece with one or more layers of net structure, and leave sufficient and uniform gap between the net structure and the workpiece for filling dispersed particles; d. Disperse particles are filled in the gaps between the mesh structures such as the metal mesh, ceramic mesh shell or sponge foam, e. Sealing the entrance of the dispersed particles; f. Bundle and fix the metal mesh or similar mesh structure; g Transformation of dispersed particles into composite coatings on workpieces by thermal processing.
  • the mesh structure is a metal mesh.
  • the mesh structure is a ceramic mesh shell.
  • the net structure is a sponge foam net structure.
  • the dispersed particles are selected from metal carbide or ceramic powder particles.
  • the heat-resistant steel wire is used for binding and fixing.
  • the hot working method is a dip soldering method.
  • the dipping soldering is performed under vacuum.
  • the thermal processing method is a thermal spraying method.
  • the thermal spraying method includes thermal spray coating under a protective gas atmosphere, and heating and remelting under a vacuum or a protective gas atmosphere.
  • the present invention also provides a method for preparing a composite coating, including the following steps: a. Modeling to provide a refractory mold that can meet the size and shape of the part; b. Placing in the mold Net structure, leaving gaps between the net structure and the inner surface of the mold to fill in the dispersed particles; c. To fill in the dispersed particles; d. To fix the net structure; A coated article is obtained.
  • the mesh structure is a metal mesh.
  • the mesh structure is a ceramic mesh shell.
  • the net structure is a sponge foam net structure.
  • the dispersed particles are selected from metal carbide or ceramic powder particles.
  • the mesh structure is fixed in the step of fixing the mesh structure with a mixture of molding sand and adhesive.
  • the pouring is performed under vacuum.
  • the method for preparing a composite coating according to the present invention is simple, the obtained coating has strong binding force with the base material, and the coating quality is good.
  • FIG. 1 is a flowchart of an embodiment of a method for preparing a composite coating using the present invention
  • FIG. 2 is a flowchart of another embodiment of a method for preparing a composite coating using the present invention
  • Figure 3 shows a schematic diagram of dip soldering under vacuum
  • Fig. 4 shows a schematic view of pouring under vacuum.
  • the method for preparing a composite coating according to the present invention mainly includes the following steps: First, the surface of the workpiece 1 is cleaned (step a):
  • the surface of the workpiece (metal substrate) to be coated with the composite coating is mechanically processed (such as rough turning, boring, milling, etc.) or polished to remove the oxide scale on the surface of the workpiece. It is then washed with dilute hydrochloric acid and then with acetone to make its surface smooth and easy for wetting of self-fusion alloys (Ni-based, Fe-based, Co-based).
  • Metal mesh should meet the following three basic requirements:
  • the perforations of the wire mesh should be smaller than the particles, so that the dispersed particles cannot pass through the wire mesh freely;
  • the wire mesh should be easy to form and can be processed into the required shape
  • the thickness of the metal mesh can be determined based on experiments.
  • Metal mesh can also be replaced by similar mesh structures (such as ceramic mesh shells or sponge foam mesh structures). Wire mesh or similar mesh structures are cut or trimmed to the appropriate size.
  • the workpiece 1 is covered with one or more layers of metal wire mesh or a similar net structure 2 and a sufficient and uniform gap is left between the wire mesh 2 and the workpiece 1 for filling dispersed particles (step c).
  • the dispersed particles 3 may be metal carbides such as metal carbide, titanium carbide, alumina powder, or ceramic powder particles.
  • the dispersed particles must be very fine, and the filled dispersed particles 3 are covered by a wire mesh 2 It is fixed on the surface of the workpiece.
  • the gaps between the dispersed particles and between the dispersed particles 3 and the surface of the workpiece 1 are small enough to meet the requirements of capillary phenomenon. Due to the capillary phenomenon, the liquid self-fluxing alloy can automatically fill all the gaps.
  • step e the inlet for dispersing the particles is sealed (step e), and a wire mesh or a similar net structure 2 is fixed by binding with a metal wire 4 (such as a heat-resistant steel wire) (step f).
  • a metal wire 4 such as a heat-resistant steel wire
  • the wire used for bundling and fixing requires sufficient strength at high temperatures, does not deform at high temperatures, and can be kept tightly tied at high temperatures without loosening.
  • the thermal processing method (such as dip brazing, thermal spraying, etc.) is used to transform the dispersed particles into a composite coating on the workpiece (step g).
  • step g in Figure 1 Use a power frequency furnace or other equipment 6 to melt the self-fluxing alloy, and put the workpiece wrapped with the wire mesh into the molten self-fluxing alloy 5 (see step g in Figure 1). Due to the capillary phenomenon, the liquid self-fluxing alloy wets the surface of the workpiece and scattered particles between the surface of the workpiece and the wire mesh, filling all the gaps. Then the workpiece was taken out, cooled and solidified, and a workpiece with a composite coating was obtained.
  • a vacuum can also be drawn around the power frequency furnace so that the molten self-fluxing alloy is under vacuum (see Figure 3).
  • the wettability of the surface of the self-fluxing alloy and the dispersed particles can be improved, and on the other hand, the oxidation of the self-fluxing alloy, the metal mesh and the dispersed particles can be reduced, thereby greatly improving the quality of the product.
  • the workpiece covered with the wire mesh is thermally sprayed (not shown) until the self-fluxing alloy coating wets the entire particle layer between the surface of the workpiece and the wire mesh.
  • the workpiece is heated and remelted in a high temperature salt bath furnace or vacuum furnace. Due to capillary phenomena, Self-fluxing alloy does not drain.
  • the workpiece was taken out, cooled and solidified, and a workpiece with a composite coating was obtained. Common thermal spray coatings tend to come off.
  • the composite coating prepared by this process is very tightly bonded to the substrate and is not easy to fall off. And the thickness can be controlled freely within a certain range, which is determined by the thickness of the dispersed particle layer between the workpiece and the metal wire mesh.
  • the method of fixing dispersed particles with a mesh structure according to the present invention can also be used to combine the substrate and the surface coating by other thermal processing methods.
  • a composite casting method can be used.
  • the following methods can be used (see Figure 2):
  • Step a Molding-Provide a refractory mold (such as a sand mold) that meets the beginning of the part size11. High sand strength is required.
  • a refractory mold such as a sand mold
  • Step b Inside the mold, a main wire mesh or similar mesh structure 12, is left between the mesh structure and the inner surface of the mold with dispersed particles (tungsten carbide in this example). This gap is equal to the required thickness of the tungsten carbide cemented carbide layer.
  • Step c Fill the dispersed particles 13 (tungsten carbide in this example).
  • Step d Fix the network structure.
  • the wire mesh is fixed with a molding sand and adhesive mixture 14.
  • Step e Close the box 15, and pour.
  • the molten metal or alloy (high manganese steel in this example) is poured into the mold. After the casting is cooled, a coated system is obtained.
  • the mold it is also possible to place the mold in a sealed vacuum chamber. During the pouring process, the vacuum chamber is evacuated and then poured under vacuum (see Figure 4). On the one hand, it can improve self-melting The wettability of the surface of alloys and dispersed particles, on the other hand, can reduce the oxidation of self-fluxing alloys, wire meshes and dispersed particles, thereby improving the quality of products.
  • the invention is characterized in that the dispersed particles are fixed by a metal wire mesh, and since the introduction of a metal mesh to fix the dispersed particles, it provides great convenience for thermal processing.
  • a metal wire mesh to fix the dispersed particles, it provides great convenience for thermal processing.

Abstract

L'invention concerne un procédé de préparation de revêtement composite consistant à nettoyer la surface d'une pièce à usiner, à ménager un espace suffisant, à envelopper la pièce avec une structure de masquage sous forme d'écran métallique, céramique ou en mousse, à y insérer des particules à dispersion, à fermer l'entrée, à fixer la structure de masquage, puis à la chauffer afin de braser par galvanisation ou de pulvériser à chaud les particules qui vont se transformer en revêtement composite. Un autre procédé de coulage peut être mis en oeuvre au cours duquel le métal est coulé dans un moule contenant les particules de dispersion afin d'obtenir un objet coulé servant de revêtement composite. Dans le but d'améliorer la qualité du revêtement composite, le processus de chauffage peut être réalisé sous vide ou sous atmosphère protégée.
PCT/CN2000/000572 1999-12-24 2000-12-12 Procede de preparation de revetement composite WO2001048266A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU19845/01A AU1984501A (en) 1999-12-24 2000-12-12 Method for producing a composite coating

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN99126903.9 1999-12-24
CN99126903 1999-12-24

Publications (1)

Publication Number Publication Date
WO2001048266A1 true WO2001048266A1 (fr) 2001-07-05

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ID=5284615

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2000/000572 WO2001048266A1 (fr) 1999-12-24 2000-12-12 Procede de preparation de revetement composite

Country Status (2)

Country Link
AU (1) AU1984501A (fr)
WO (1) WO2001048266A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104148616A (zh) * 2014-08-04 2014-11-19 吴建化 一种金属网格增强体与金属基融合的铸造方法
CN112846432A (zh) * 2019-11-12 2021-05-28 湖北伊克斯热交换系统有限公司 复杂构件的钎焊方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114537A (ja) * 1983-11-25 1985-06-21 Toyota Motor Corp 合金の製造方法
CN1039747A (zh) * 1989-07-19 1990-02-21 浙江大学 一种提高铸渗合金层厚度的方法
CN1066013A (zh) * 1991-04-23 1992-11-11 机械电子工业部沈阳铸造研究所 铸件表面合金化工艺及材料
CN1124786A (zh) * 1994-12-20 1996-06-19 青岛建筑工程学院 镍基合金-碳化铬硬面复合涂层材料及方法
JPH09174199A (ja) * 1995-10-24 1997-07-08 Mishima Kosan Co Ltd 連続鋳造用鋳型
JPH10318038A (ja) * 1997-05-15 1998-12-02 Toyota Autom Loom Works Ltd シリンダブロックの鋳造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114537A (ja) * 1983-11-25 1985-06-21 Toyota Motor Corp 合金の製造方法
CN1039747A (zh) * 1989-07-19 1990-02-21 浙江大学 一种提高铸渗合金层厚度的方法
CN1066013A (zh) * 1991-04-23 1992-11-11 机械电子工业部沈阳铸造研究所 铸件表面合金化工艺及材料
CN1124786A (zh) * 1994-12-20 1996-06-19 青岛建筑工程学院 镍基合金-碳化铬硬面复合涂层材料及方法
JPH09174199A (ja) * 1995-10-24 1997-07-08 Mishima Kosan Co Ltd 連続鋳造用鋳型
JPH10318038A (ja) * 1997-05-15 1998-12-02 Toyota Autom Loom Works Ltd シリンダブロックの鋳造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104148616A (zh) * 2014-08-04 2014-11-19 吴建化 一种金属网格增强体与金属基融合的铸造方法
CN112846432A (zh) * 2019-11-12 2021-05-28 湖北伊克斯热交换系统有限公司 复杂构件的钎焊方法

Also Published As

Publication number Publication date
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