WO2014128952A1 - STRUCTURE REVÊTUE DE Ti ET SON PROCÉDÉ DE PRODUCTION - Google Patents

STRUCTURE REVÊTUE DE Ti ET SON PROCÉDÉ DE PRODUCTION Download PDF

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Publication number
WO2014128952A1
WO2014128952A1 PCT/JP2013/054659 JP2013054659W WO2014128952A1 WO 2014128952 A1 WO2014128952 A1 WO 2014128952A1 JP 2013054659 W JP2013054659 W JP 2013054659W WO 2014128952 A1 WO2014128952 A1 WO 2014128952A1
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WIPO (PCT)
Prior art keywords
film
particles
spraying
manufacturing
coating
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PCT/JP2013/054659
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English (en)
Japanese (ja)
Inventor
正也 小境
茂 菊池
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株式会社 日立製作所
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Application filed by 株式会社 日立製作所 filed Critical 株式会社 日立製作所
Priority to PCT/JP2013/054659 priority Critical patent/WO2014128952A1/fr
Priority to JP2015501215A priority patent/JPWO2014128952A1/ja
Publication of WO2014128952A1 publication Critical patent/WO2014128952A1/fr

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    • 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
    • C23C24/02—Coating starting from inorganic powder by application of pressure only
    • C23C24/04—Impact or kinetic deposition of particles

Definitions

  • the present invention relates to a chloride-resistant structure coated with Ti and a method for producing the same.
  • wind power generation facilities can generate power in various forms from small to large, and are constructed in various places such as mountains, coasts, and offshore where wind power can be obtained.
  • the wind power generation equipment mainly consists of a generator, blades, tower, and the like.
  • the towers that support the generators and blades are made of steel and some are built in seawater.
  • Patent Document 1 discloses a cold spray method that uses combustion gas to accelerate particles and does not melt the particles, and shows that it is effective for forming a film of a refractory metal such as Ti. .
  • An object of the present invention is to improve corrosion resistance.
  • the present invention provides a method of manufacturing a structure in which a Ti film is formed on a substrate, a step of heating the substrate, a step of pressurizing a gas, and the pressurized gas It is characterized by comprising a step of introducing Ti particles therein, a step of spraying the particles onto the heated substrate, and a step of heating a film formed by depositing the particles.
  • the corrosion resistance can be improved.
  • Ti coating cross section Diagram showing the relationship between oxygen content and tensile strength of Ti film Comparison of coating surface before and after corrosion test of Ti coating Comparison of coating cross-section before and after corrosion test for Ti coating
  • the Ti coating of the present invention heat-treats the substrate, then forms a coating by depositing Ti particles on the substrate by a cold spray method at a temperature at which Ti particles are not easily oxidized, and heat-treats the coating below the melting point of Ti Can be obtained.
  • the adhesion between the Ti particles as the first layer of the film and the base material is improved.
  • Ti particles By depositing Ti particles without oxidizing them, Ti particles are bonded metallurgically and oxides are not easily formed at the grain boundaries, so intergranular corrosion is less likely to occur.
  • heat-treating the formed film the porosity of the film surface is reduced and densified.
  • the film forming means is a cold spray method, and Ti particles are sprayed onto the substrate by a gas accelerated at supersonic speed at a temperature lower than the melting point of Ti.
  • the collided Ti particles are deformed by the impact and are deposited on the substrate or the deposited Ti particles.
  • a laval nozzle with a tapered taper was used as the cold spray gun in order to obtain a supersonic gas flow.
  • Trial conditions were N 2 , gas temperature 800 ° C, gas pressure 5MPa, irradiation distance between substrate and nozzle tip 20mm, cold spray gun scanning speed 300mm / s, and film formation in air .
  • the film formation conditions are not limited to the above-mentioned conditions, and for example, the gas quality can be improved by using He or changing the gas temperature or gas pressure.
  • the higher the gas temperature and the higher the gas pressure the greater the sound velocity of the gas can be increased.
  • the substrate was carbon steel S45C, and the powder was pure Ti atomized powder having a particle size of 45 ⁇ m or less.
  • the film thickness can be adjusted by the number of times of cold spray gun scanning, and a film of about 1.5 mm was formed.
  • the film thickness is desirably a plurality of particle layers for corrosion resistance, and is preferably 100 ⁇ m or more.
  • the substrate was heated at about 850 ° C.
  • the surface of the substrate became smooth by heating, and the adhesion between the substrate and the particles was improved.
  • a film was formed under the above film forming conditions. Thereafter, the film was heated in vacuum at 850 ° C. for 10 minutes. Since the porosity of the surface is reduced by heating the coating, the adhesion between the particles is improved. These make it difficult for the chlorinated substance to reach the base material and improve the corrosion resistance.
  • Figure 1 shows a cross section of the prototype coating.
  • the state of Ti particle deposition can be confirmed, and it can be seen that the film is flattened in the thickness direction.
  • about 65% of the particles are flattened and deposited so that the aspect ratio (x / y) between the in-plane direction x and the thickness direction y is 1.5 or more.
  • the aspect ratio of the Ti particles is increased, the adhesion area between the Ti particles in the in-plane direction of the film is increased, and the intergranular corrosion path in the thickness direction is increased, which is effective in improving the corrosion resistance.
  • Adjacent particles can be metallurgically bonded to each other by impact due to collision, so that a strong film can be formed.
  • the porosity of the film surface of the comparative example was about 5.4%
  • the film of the heat-treated example film became more dense and the porosity decreased to 4.1%.
  • the hardness of the film became 170 HV by heat treatment.
  • the film may be further pressurized.
  • the relative density of the film before pressing was densified from about 94% to 97% after pressing, and the corrosion resistance was further improved.
  • Figure 2 shows the relationship between the oxygen content of the film and the tensile strength. As the oxygen content in the film increases, the tensile strength decreases.
  • the oxygen content of the film formed by cold spray was about 2000 ppm, whereas when the film was formed by thermal spraying, the oxygen content of the film exceeded 10000 ppm, and a large difference occurred in the oxygen content. Accordingly, film formation by cold spraying with a low oxygen content of the film is advantageous in terms of strength.
  • the bond strength between the substrate and the particles and the bond strength between the particles are improved.
  • Tensile strength is improved.
  • FIG. 3 shows the state of the film surface before and after the test
  • FIG. 4 shows the cross section of the film after the test. Both show the two types of evaluation results of the film as it is (Comparative Example) and the film (Example) that was heat-treated after film formation. Although the discolored part is scattered on the surface of the film after the test, it is discolored due to adhesion of impurities and is not derived from Ti particles. In FIG. 3, it appears that there is not much difference between the surface states of the example and the comparative example. However, the film 1 shown in FIG.
  • the indentation of the example is smaller than the indentation of the comparative example. Thereby, even if salt water or the like comes into contact with the film, the cone is less likely to reach the inside, so that the corrosion resistance is improved.
  • ⁇ An actual structure for example, a wind power generation tower, has an outer diameter of about 4 m and a structure having a height of about 50 m by joining a plurality of cylindrical members.
  • the film can be formed by moving the cold spray device from the end of the cylinder while rotating at a constant speed with the central axis of the cylindrical member as the rotation axis.
  • This example shows an example in which the deposited particle diameter in the coating changes in the coating thickness direction.
  • the description of the parts common to the first embodiment is omitted.
  • a distribution in the Ti particle size to be injected In order to change the particle size distribution in the thickness direction of the film, it is necessary to have a distribution in the Ti particle size to be injected.
  • a plurality of powder supply systems of the cold spray apparatus are used. For example, two powder supply systems are connected to a cold spray nozzle.
  • One supply system is supplied with Ti powder having a large particle size, for example, in the range of 50 to 100 ⁇ m, and one supply system is supplied with Ti powder having a small particle size, for example, in the range of 5 to 50 ⁇ m.
  • the particle distribution in the film can be changed continuously.
  • a film having a multilayer particle size distribution composed of large particles and small particles By repeatedly switching the powder supply, it is possible to form a film having a multilayer particle size distribution composed of large particles and small particles. Forming a layer having a large particle size on top of a layer having a small particle size can be expected to have an effect of densifying the layer having a small particle size by the effect of collision.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

L'invention porte sur un procédé pour la production d'une structure consistant à former un film de revêtement en Ti sur une base dans le but d'améliorer la résistance à la corrosion de la structure, ledit procédé comprenant les étapes consistant à : chauffer la base; mettre un gaz sous pression; introduire des particules de Ti dans le gaz sous pression; pulvériser les particules sur la base chauffée; et chauffer un film de revêtement qui est formé en raison du dépôt des particules.
PCT/JP2013/054659 2013-02-25 2013-02-25 STRUCTURE REVÊTUE DE Ti ET SON PROCÉDÉ DE PRODUCTION WO2014128952A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2013/054659 WO2014128952A1 (fr) 2013-02-25 2013-02-25 STRUCTURE REVÊTUE DE Ti ET SON PROCÉDÉ DE PRODUCTION
JP2015501215A JPWO2014128952A1 (ja) 2013-02-25 2013-02-25 Ｔｉ被覆構造体とその製法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/054659 WO2014128952A1 (fr) 2013-02-25 2013-02-25 STRUCTURE REVÊTUE DE Ti ET SON PROCÉDÉ DE PRODUCTION

Publications (1)

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WO2014128952A1 true WO2014128952A1 (fr) 2014-08-28

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JP (1) JPWO2014128952A1 (fr)
WO (1) WO2014128952A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006289364A (ja) * 2005-04-14 2006-10-26 United Technol Corp <Utc> コールドスプレーを用いて傾斜機能材料を生成するための方法およびシステム
JP2008069448A (ja) * 2006-09-11 2008-03-27 United Technol Corp <Utc> チタン合金部品の処理方法
JP2008095176A (ja) * 2006-06-21 2008-04-24 General Electric Co <Ge> 環境保護用の歪み耐性皮膜
JP2008302317A (ja) * 2007-06-08 2008-12-18 Ihi Corp コールドスプレー方法、コールドスプレー装置
JP2010144224A (ja) * 2008-12-19 2010-07-01 Honda Motor Co Ltd 金属皮膜の改質処理方法及びアルミ基合金積層体
JP2012243629A (ja) * 2011-05-20 2012-12-10 National Institute Of Advanced Industrial & Technology 製膜方法、製膜体、及び色素増感太陽電池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006289364A (ja) * 2005-04-14 2006-10-26 United Technol Corp <Utc> コールドスプレーを用いて傾斜機能材料を生成するための方法およびシステム
JP2008095176A (ja) * 2006-06-21 2008-04-24 General Electric Co <Ge> 環境保護用の歪み耐性皮膜
JP2008069448A (ja) * 2006-09-11 2008-03-27 United Technol Corp <Utc> チタン合金部品の処理方法
JP2008302317A (ja) * 2007-06-08 2008-12-18 Ihi Corp コールドスプレー方法、コールドスプレー装置
JP2010144224A (ja) * 2008-12-19 2010-07-01 Honda Motor Co Ltd 金属皮膜の改質処理方法及びアルミ基合金積層体
JP2012243629A (ja) * 2011-05-20 2012-12-10 National Institute Of Advanced Industrial & Technology 製膜方法、製膜体、及び色素増感太陽電池

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JPWO2014128952A1 (ja) 2017-02-02

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