WO2020251108A1 - Moule d'infiltration sous pression et procédé de fabrication d'un moule d'infiltration sous pression - Google Patents

Moule d'infiltration sous pression et procédé de fabrication d'un moule d'infiltration sous pression Download PDF

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Publication number
WO2020251108A1
WO2020251108A1 PCT/KR2019/007491 KR2019007491W WO2020251108A1 WO 2020251108 A1 WO2020251108 A1 WO 2020251108A1 KR 2019007491 W KR2019007491 W KR 2019007491W WO 2020251108 A1 WO2020251108 A1 WO 2020251108A1
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WO
WIPO (PCT)
Prior art keywords
mold
housing
pressure impregnation
manufacturing
aln
Prior art date
Application number
PCT/KR2019/007491
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English (en)
Korean (ko)
Inventor
김대하
이원혁
황지현
김지윤
Original Assignee
주식회사 디에이티신소재
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.)
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Application filed by 주식회사 디에이티신소재 filed Critical 주식회사 디에이티신소재
Publication of WO2020251108A1 publication Critical patent/WO2020251108A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/366—Replaceable lining plates for press mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/346—Manufacture of moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article

Definitions

  • This embodiment relates to a pressure impregnation mold and a method of manufacturing a pressure impregnation mold.
  • Cermet is a compound word of cermaic and metal. In a wide range, metals and alloys become a matrix, and ceramic particles are included in this material, which has the advantages of both metal and ceramic. . Cermet materials are distinguished from cemented carbide, which is the most widely used in the cutting tool world by manufacturing. Compared with cemented carbide, the prior art cermet had a limitation in application due to significantly lower strength and toughness, and to solve this, an improved cermet was developed that can compensate for the decrease in hardness by increasing the matrix content and strengthening the heat treatment on the matrix. Became.
  • the improved cermet is manufactured by mixing ceramic particle powder and individual elemenet or pre-alloyed powder, followed by molding and sintering, and the material produced in this way includes characteristics of the raw powder and the sintering step. Abrasion resistance and toughness vary greatly depending on manufacturing conditions.
  • the method of manufacturing the cermet is the casting step and the shape of the desired product first in the form of a pre-form with a large porosity, and the base alloy is used as a liquid.
  • a melt pressure impregnation (pressure infiltration) method, etc. prepared by pressure infiltration into the molded body.
  • the powder metallurgy method requires high cost due to high base metal price and difficult-to-cut material processing, the product shape is simple, the size is limited, the steps are complicated, and the investment equipment cost is higher than the liquid phase stage. There is this.
  • the conventional melt pressure impregnation may be performed by sequentially charging a preform and a matrix material in a pressure impregnation mold with an open upper surface and then pressing.
  • a preform and a matrix material in a pressure impregnation mold with an open upper surface and then pressing.
  • cracks are generated in the mold itself, making it impossible to reuse the mold.
  • the present invention has been proposed in order to improve the above-described problems, and an object of the present invention is to provide a mold for pressure impregnation that can be reused to reduce the manufacturing cost of a molded article.
  • the mold for pressurization impregnation includes: a housing in which a space into which a reinforcing material preform and a matrix material are input is formed; And a coating layer formed on an inner surface of the housing, wherein the coating layer is a layer coated with AlN.
  • the material of the housing may include zirconia and alumina.
  • a pressure impregnation mold in the manufacturing method of a pressure impregnation mold including a housing in which a space in which a reinforcing material preform and a matrix material are input is formed, and a coating layer formed on the inner surface of the housing , (a) preparing an AlN solution; (b) applying the AlN solution to the inner surface of the housing; And (c) drying the housing to which the AlN solution is applied.
  • the AlN solution may be a mixture of AlN and ethanol.
  • the drying step may be performed for 8 to 12 minutes under the condition of 70°C.
  • the material of the housing may include zirconia and alumina.
  • the preform includes a tool steel-based powder containing at least one selected from the group consisting of STD 11, STD 61, SKH 2 and SKH 9, titanium carbide (TiC) and polymer resin, and has a volume ratio of less than 50%. It may be a carbide foam.
  • the matrix material may be made of the same metal as the tool steel-based powder, and may be formed by pressure impregnation inside the reinforcing material preform.
  • the mold can be formed in various shapes, so that it is easy to manufacture, and there is an advantage of reducing the cost compared to producing a mold made of a conventional MgO material.
  • FIG. 1 is a schematic diagram of a melt pressure impregnation process according to an embodiment of the present invention.
  • Figure 2 is a schematic diagram of a pressure impregnation process according to an embodiment of the present invention.
  • FIG. 3 is a table showing the experimental values of the mold for pressure impregnation according to an embodiment of the present invention.
  • first, second, A, B, (a), and (b) may be used in describing the constituent elements of the embodiment of the present invention.
  • a component when a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also the component It may also include a case of being'connected','coupled', or'connected' due to another component between the and the other component.
  • top (top) or bottom (bottom) when it is described as being formed or disposed on the “top (top) or bottom (bottom)” of each component, the top (top) or bottom (bottom) is not only when the two components are in direct contact with each other, It also includes the case where one or more other components are formed or disposed between the two components.
  • upper (upper) or lower (lower) when expressed as "upper (upper) or lower (lower)", the meaning of not only an upward direction but also a downward direction based on one component may be included.
  • FIG. 1 is a schematic diagram of a melt pressure impregnation process according to an embodiment of the present invention.
  • a wear-resistant cermet 100 with a controlled carbide volume ratio includes a reinforcing material preform 200 and a matrix material 300.
  • the reinforcing material preform 200 is STD 11, STD 61, and SKH.
  • 2 and SKH 9 may include a tool steel-based powder including at least one or more selected from the group consisting of titanium carbide (TiC) and a polymer resin.
  • the tool steel-based powder may include a stainless alloy-based, but is not limited thereto.
  • the stainless alloy system may be a martensite type or a precipitation hardening type.
  • STD 11 and STD 61 are alloy tool steel materials and contain Fe, C, Si, Mn, P, S, Cr, Mo, V, etc. as main components.
  • SKH 2 and SKH9 are high speed steels.
  • the tool steel-based powder according to the present invention can increase the strength of the preform by acting as a binder after sintering in the cermet manufacturing process, and has the effect of suppressing the damage of the preform due to thermal shock during impregnation.
  • the reinforcing material preform 200 according to the present invention may be a carbide foam having a volume ratio of less than 50%. When the volume ratio of carbide is less than 50%, mechanical processing is easy, it can be applied to rolling rolls or guide rolls, and hardness control through heat treatment is possible.
  • FIG. 2 is a schematic diagram of a pressure impregnation process according to an embodiment of the present invention.
  • the mold for pressure impregnation may include a housing 500 and a coating layer 600 coated in the housing 500.
  • the housing 500 may accommodate raw materials in a certain form, and may be formed in a shape with an open top surface. Accordingly, a space capable of accommodating the reinforcement preform 200 and the matrix 300 may be formed inside the housing 500.
  • the material of the housing 500 may include zirconia.
  • the material of the housing 500 may include zirconia and alumina.
  • the shape of the mold can be formed in various ways, so that it is easy to manufacture, and it has the advantage of reducing the cost compared to producing the mold using the conventional MgO material. have.
  • Zirconia has a melting point of 2700° C., has high corrosion resistance, and can withstand rapid temperature changes.
  • the coating layer 600 may be formed on an inner surface of the space inside the housing 500.
  • the coating layer 600 may be a layer coated with AlN.
  • the method of manufacturing a mold for pressure impregnation according to the present invention includes the steps of preparing an AlN solution (S10); Applying the AlN solution to the housing 500 (S20); And drying the housing 500 to which the AlN solution is applied (S30).
  • the AlN solution may be a mixture of ethanol and AlN. Therefore, the AlN can be easily applied to the inner surface of the housing 500 through the ethanol.
  • drying step (S30) may be performed for 8 to 12 minutes under a temperature condition of 70°C. Due to this, the ethanol is vaporized, and only the AlN layer is coated on the inner surface of the housing 500 to remain.
  • the thickness of the coating layer 600 may be 10 ⁇ m or less. Accordingly, a white layer may be formed by the coating layer 600 in the pressure impregnation mold.
  • the molded body when the molded body is separated from the mold after the pressure-impregnating process is completed, the molded body can be easily separated from the mold by the coating layer 600. That is, by forming the material of the coating layer 600 with the same material as the molded article, the inner surface of the coating layer 600 and the outer surface of the molded article are combined and can be easily separated from the housing 500.
  • FIG. 3 is a table showing experimental values of a mold for pressure impregnation according to an embodiment of the present invention. In FIG. 3, it is shown that the impregnation process is performed a plurality of times by loading different types of impregnating materials into a single pressure impregnation mold.
  • the mold for pressure impregnation has the advantage of being reusable. That is, even if a separate process in which not only a single type of impregnating material but also different types of impregnating materials is sequentially performed, the housing 500 can be firmly maintained and thus reused. Furthermore, even if impregnation conditions are different between a plurality of processes, the housing 500 may be firmly maintained.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

Un mode de réalisation de la présente invention concerne un moule d'infiltration sous pression et un procédé de fabrication d'un moule d'infiltration sous pression. Un moule d'infiltration sous pression, selon un aspect, comprend : un boîtier dans lequel se trouve un espace dans lequel sont insérés une préforme de renfort et un matériau de matrice; et une couche de revêtement formée sur la surface interne du boîtier, la couche de revêtement étant une couche revêtue d'AlN.
PCT/KR2019/007491 2019-06-12 2019-06-21 Moule d'infiltration sous pression et procédé de fabrication d'un moule d'infiltration sous pression WO2020251108A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2019-0069549 2019-06-12
KR1020190069549A KR102276196B1 (ko) 2019-06-12 2019-06-12 가압 함침용 몰드 및 가압 함침용 몰드의 제조방법

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WO2020251108A1 true WO2020251108A1 (fr) 2020-12-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115502391A (zh) * 2022-09-15 2022-12-23 浙江省冶金研究院有限公司 一种表面陶瓷硬化粉末高速钢的制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1052733A (ja) * 1996-05-31 1998-02-24 Brush Wellman Inc ベリリウム合金の鋳造方法及びそれらのモールドと中子
JPH11269574A (ja) * 1998-03-19 1999-10-05 Toyoda Mach Works Ltd ウィスカ強化合金製機械部材の製造方法およびウィスカ強化合金製機械部材
US20020166649A1 (en) * 1999-09-16 2002-11-14 Gegel Gerald A. Mold assembly and method for pressure casting elevated melting temperature materials
KR20140094190A (ko) * 2013-01-21 2014-07-30 주식회사 티앤머티리얼스 가압함침용 금형
KR20180126830A (ko) * 2017-05-18 2018-11-28 주식회사 대화알로이테크 가압 함침용 강화재 예비성형체의 부유 방지 방법 및 부유 방지용 몰드

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100678589B1 (ko) * 2004-11-04 2007-02-02 (주)엠티아이지 복합층 재료 및 그 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1052733A (ja) * 1996-05-31 1998-02-24 Brush Wellman Inc ベリリウム合金の鋳造方法及びそれらのモールドと中子
JPH11269574A (ja) * 1998-03-19 1999-10-05 Toyoda Mach Works Ltd ウィスカ強化合金製機械部材の製造方法およびウィスカ強化合金製機械部材
US20020166649A1 (en) * 1999-09-16 2002-11-14 Gegel Gerald A. Mold assembly and method for pressure casting elevated melting temperature materials
KR20140094190A (ko) * 2013-01-21 2014-07-30 주식회사 티앤머티리얼스 가압함침용 금형
KR20180126830A (ko) * 2017-05-18 2018-11-28 주식회사 대화알로이테크 가압 함침용 강화재 예비성형체의 부유 방지 방법 및 부유 방지용 몰드

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115502391A (zh) * 2022-09-15 2022-12-23 浙江省冶金研究院有限公司 一种表面陶瓷硬化粉末高速钢的制备方法
CN115502391B (zh) * 2022-09-15 2024-01-09 浙江省冶金研究院有限公司 一种表面陶瓷硬化粉末高速钢的制备方法

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KR102276196B1 (ko) 2021-07-12

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