WO2024069386A1 - Couteau et son procédé de fabrication - Google Patents

Couteau et son procédé de fabrication Download PDF

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Publication number
WO2024069386A1
WO2024069386A1 PCT/IB2023/059495 IB2023059495W WO2024069386A1 WO 2024069386 A1 WO2024069386 A1 WO 2024069386A1 IB 2023059495 W IB2023059495 W IB 2023059495W WO 2024069386 A1 WO2024069386 A1 WO 2024069386A1
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WO
WIPO (PCT)
Prior art keywords
tool
composite material
ceramic particles
hard ceramic
powder
Prior art date
Application number
PCT/IB2023/059495
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English (en)
Chinese (zh)
Inventor
瞿义生
Original Assignee
武汉苏泊尔炊具有限公司
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Filing date
Publication date
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Publication of WO2024069386A1 publication Critical patent/WO2024069386A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B3/00—Hand knives with fixed blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1003—Use of special medium during sintering, e.g. sintering aid
    • B22F3/1007—Atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/026—Spray drying of solutions or suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B9/00—Blades for hand knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware

Definitions

  • Knife and its manufacturing method TECHNICAL FIELD
  • the present invention relates to the field of knives, and more specifically, to a knife and its manufacturing method.
  • BACKGROUND Knife is one of the instruments that people often need to use in daily life.
  • the sharpness of the knife is the main factor to consider the performance of the knife.
  • the common knives on the market are martensitic stainless steel knives, which are one of the knives with better performance.
  • this type of knife still has the following disadvantages: the cutting edge of the knife is usually a thinner conical structure. In daily use, the cutting edge will inevitably hit the hard material (for example, a cutting board, a bone), and after a period of use, there will be obvious bending (i.e., curling) at the cutting edge.
  • the purpose of the present invention is to provide a knife and a manufacturing method thereof to solve the problem of insufficient lasting sharpness of knives in the prior art.
  • the tool according to the present invention comprises: a main body, made of a matrix material or a composite material; and a blade, made of the composite material and bonded to the main body, wherein the composite material comprises the matrix material and hard ceramic particles uniformly distributed in the matrix material, wherein the hard ceramic particles have a higher melting point than the matrix material.
  • the matrix material comprises at least one of martensitic stainless steel, austenitic stainless steel and duplex stainless steel.
  • the hard ceramic particles comprise at least one of calcium carbide, silicon carbide, zirconium oxide, aluminum oxide, chromium carbide, titanium oxide, titanium carbide and silicon nitride.
  • the particle size of the hard ceramic particles is in the range of 20
  • the method for manufacturing the above-mentioned tool includes: mixing matrix material powder and hard ceramic particles uniformly through a ball milling mixing process to manufacture a composite material slurry, and preparing a dry composite material powder through a spray powdering method; pressing the composite material powder in a mold to form a tool embryo or pressing the matrix material powder and the composite material powder in a mold to form a tool embryo, wherein the part of the tool embryo corresponding to the blade of the tool is made of composite material, and the part of the tool embryo corresponding to the main body of the tool is made of matrix material or composite material; sintering the tool embryo in a protective atmosphere so that the matrix material is melted and the hard ceramic particles remain in a particle state; and grinding and sharpening the tool embryo after cooling.
  • the particle size of the matrix material powder and the hard ceramic particles are both in the range of 20
  • the mass percentage of the matrix material powder in the composite material powder is 70%-90%, and the mass percentage of the hard ceramic particles is 10%-30%.
  • the molding pressure when pressing to form the tool blank is 200MPa-500MPa .
  • a method for manufacturing the above-mentioned tool includes: manufacturing a main body and a blade separately, and then combining the blade to the main body.
  • the blade of the tool includes a matrix material and hard ceramic particles uniformly distributed in the matrix material.
  • the hard ceramic particles are uniformly dispersed at the blade, which can significantly improve the wear resistance of the blade, reduce the wear of the tool during use, and thus improve the long-term sharpness of the tool.
  • the uniformly dispersed hard ceramic particles can form a micro-serrated structure at the blade, which improves the strength and cutting ability of the tool, makes the tool less likely to curl, and thus can improve the long-term sharpness of the tool.
  • FIG. 1 is a schematic diagram schematically showing the structure of a tool according to an embodiment.
  • FIG. 2 is a partial enlarged view of FIG. 1 according to an embodiment of the present application.
  • a tool 100 according to an embodiment includes a main body 10 and a blade 20 coupled to the main body 10.
  • the main body 10 and the blade 20 may be formed integrally.
  • the main body 10 may include a matrix material or a composite material (the composite material is described later), or may be made of a matrix material or a composite material.
  • the main body 10 is composed of a matrix material or a composite material.
  • the matrix material includes at least one of martensitic stainless steel, austenitic stainless steel, and duplex stainless steel.
  • the melting point of the matrix material is typically in the range of 1300° C. to 1500° C.
  • the blade 20 may include or be made of a composite material, for example, the blade 20 may consist of a composite material.
  • the composite material may include a matrix material (as described above) and hard ceramic particles uniformly distributed in the matrix material, wherein the hard ceramic particles may include at least one of calcium carbide (WC, melting point 2870°C), silicon carbide (SiC, melting point 2700°C), zirconium oxide (ZrCh, melting point 2700°C), aluminum oxide (AI2O3, melting point 2054°C), chromium carbide ( Cr7C3 , melting point 1890°C), titanium oxide ( TiO2 , melting point 3140°C), titanium carbide (TiC, melting point 3140°C) and silicon nitride ( Si3N4 , melting point 1900°C).
  • the hard ceramic particles have a melting point higher than that of the matrix material.
  • the hard ceramic particles are uniformly dispersed at the blade 20, And the particle size of the hard ceramic particles can be 20
  • the hard ceramic particles have higher hardness and wear resistance than the matrix material. Therefore, the hard ceramic particles are evenly distributed in the matrix material, which can significantly enhance the wear resistance of the blade, so that the wear of the tool 100 during use is reduced.
  • the particle size of the hard ceramic particles is less than 20gm, the improvement of the wear resistance of the blade 20 may not be obvious; when the particle size of the hard ceramic particles is greater than 100pm, the combination effect of the hard ceramic particles and the matrix material is The result may be poor, which may affect the improvement of the wear resistance of the tool 100.
  • the hard ceramic particles can have various regular or irregular shapes.
  • the hard ceramic particles are evenly dispersed in the inner and outer surfaces of the blade 20, and the hard ceramic particles exposed on the outer surface of the blade 20 are in a state of micro-protrusions from the surface of the blade 20, so that a micro-serration structure can be formed on the surface of the blade, which improves the strength and cutting ability of the tool, making it less likely for the tool to roll, thereby further improving the long-term sharpness of the tool.
  • the composite material included in the main body 10 and the composite material included in the blade 20 may include the same kind of hard ceramic particles (for example, both include TiC), or may include different kinds of hard ceramic particles.
  • the composite material included in the main body 10 includes TiC
  • the composite material included in the blade 20 includes Si3N4 .
  • the mass percentage of the matrix material may be 70%-90%, and the mass percentage of the hard ceramic particles may be 10%-30% . If the mass percentage of the hard ceramic particles is less than 10%, it may be difficult to form a micro-serrated structure due to the sparse distribution of the hard ceramic particles, so that the wear resistance improvement effect is not obvious. If the mass percentage of the hard ceramic particles is greater than 30%, the toughness may be deteriorated due to excessive modification, so that the blade is easy to break. Next, the method for manufacturing the above-mentioned tool 100 will be described in detail.
  • the matrix material powder and the hard ceramic particles are mixed evenly by a wet ball milling mixing process to prepare the composite material powder, specifically as follows: hard ceramic particles with a particle size of 20
  • the conditions of the spray powder method are as follows: the atomization pressure is 0.3-0.6MPa, preferably 0.4-0.5MPa; the atomization air flow rate is 0.5-5m3/h, preferably Selected as 1-3m3/h; inlet temperature is 200-600. Preferably 300-400. (2; the outlet temperature is 50-200°C, preferably 80-160°C .
  • the tool embryo is prepared by powder metallurgy.
  • the matrix material powder and the composite material powder are pressed in a mold by a pressing process to form an initial tool embryo. Specifically, a sufficient amount of composite material powder is placed in a position corresponding to the blade 20 in the mold, and a sufficient amount of matrix material powder is placed in a position corresponding to the main body 10 in the mold.
  • the initial tool embryo is formed integrally under 200MPa-500MPa by a pressing process.
  • the portion of the initial tool embryo corresponding to the blade of the tool is composed of the composite material
  • the portion of the initial tool embryo corresponding to the main body of the tool is composed of the matrix material, but the present disclosure is not limited thereto.
  • the composite material powder can be added to the positions corresponding to the blade 20 and the main body 10 in the mold.
  • the portion of the initial tool embryo corresponding to the main body 10 of the tool manufactured in this way is composed of the composite material.
  • the initial tool embryo can be formed integrally of the composite material.
  • the initial tool body is subjected to a solid phase sintering process in a protective atmosphere.
  • the sintering temperature is generally 0.7 to 1.0 Tm (Tm is the absolute melting point), which can be 910°C-1500°C, and the sintering time can be 20min-40min, so as to prepare the tool body.
  • Tm is the absolute melting point
  • one of reducing gas, nitrogen or inert gas can be used as a protective gas or sintering can be performed in a vacuum environment to avoid direct contact between the powder in the initial tool body and oxidizing gases such as oxygen.
  • the hard ceramic material has a higher melting point than the matrix material, the hard ceramic particles will always be in a solid state, while the matrix material powder will flow, diffuse, dissolve, and recrystallize with each other.
  • the gas in the powder gap in the initial tool body or the gas dissolved in the metal can be completely driven out at high temperature, and the degree of densification is increased.
  • the main body 10 made of a matrix material or a composite material and the blade 20 made of a composite material can be manufactured by a press molding process or a powder metallurgy process, and then the blade 20 is welded (for example, cold welding) to the main body 10 to manufacture the tool 100.
  • the tool 100 according to the present invention will be described in more detail below in conjunction with an embodiment, and the root The knife 100 of the present invention is evaluated for its long-lasting sharpness and blade strength.
  • Example 1 Tie powder with a particle size of 50 gm and martensitic stainless steel powder with a particle size of 50 gm are ground for 15 hours using the above ball milling mixing process to prepare a composite material slurry, wherein the mass percentage of martensitic stainless steel powder is 80% and the mass percentage of TiC powder is 20%.
  • the composite material powder is prepared by a spray powder making method, and the conditions of the spray powder making method are as follows: atomization pressure: 0.4 MPa, atomization air flow rate: 2 m 3 /h; inlet temperature: 300-400°C, outlet temperature: 120. (2.
  • the composite material powder is integrally pressed into an initial tool embryo by a pressing molding process, and the molding pressure is 300 MPa .
  • the initial tool embryo is sintered in a vacuum environment, the sintering temperature is 1300°C, and the sintering time is 30 min to obtain a tool embryo. After the tool embryo is cooled, it is subjected to conventional grinding and sharpening to manufacture a tool 100.
  • Example 2 Except that the mass percentage of martensitic stainless steel powder in the composite material powder is 90%, and the mass percentage of TiC powder is 10%, a tool 100 is manufactured in a method substantially the same as that of Example 1.
  • Example 3 Except that the mass percentage of martensitic stainless steel powder in the composite material powder is 83.3%, and the mass percentage of TiC powder is 16.7%, a tool 100 is manufactured in a method substantially the same as that of Example 1.
  • Example 4 Except that the mass percentage of martensitic stainless steel powder in the composite material powder is 70%, and the mass percentage of TiC powder is 30%, a tool 100 is manufactured in a method substantially the same as that of Example 1.
  • Example 5 Except that the mass percentage of martensitic stainless steel powder in the composite material powder is 60%, The tool 100 was manufactured in the same manner as in Example 1 except that the mass percentage of the TiC powder was 40%. A tool 100 was manufactured in substantially the same manner as in Example 1, except that the mass percentage of martensitic stainless steel powder in the composite material powder was 95% and the mass percentage of TiC powder was 5%.
  • Example 7 A tool 100 was manufactured in substantially the same manner as in Example 1, except that TiC powder with a particle size of 10 gm and martensitic stainless steel powder with a particle size of 50 gm were used to prepare the composite material powder.
  • Example 8 A tool 100 was manufactured in substantially the same manner as in Example 1, except that TiC powder with a particle size of 20 gm and martensitic stainless steel powder with a particle size of 50 gm were used to prepare the composite material powder.
  • Example 9 A tool 100 was manufactured in substantially the same manner as in Example 1, except that TiC powder with a particle size of 40 gm and martensitic stainless steel powder with a particle size of 50 gm were used to prepare the composite material powder.
  • Example 10 A tool 100 was manufactured in substantially the same manner as in Example 1, except that Tie powder with a particle size of 60 gm and martensitic stainless steel powder with a particle size of 50 gm were used to prepare the composite material powder.
  • Example 11 A tool 100 was manufactured in substantially the same manner as in Example 1, except that Tie powder with a particle size of 80 gm and martensitic stainless steel powder with a particle size of 50 gm were used to prepare the composite material powder.
  • a tool 100 was manufactured in the same manner as in Example 1 except that the composite material powder was prepared using TiC powder with a particle size of 100 ⁇ m and martensitic stainless steel powder with a particle size of 50 gm.
  • Example 12 A tool 100 was manufactured in the same manner as in Example 1 except that the composite material powder was prepared using TiC powder with a particle size of 100 ⁇ m and martensitic stainless steel powder with a particle size of 50 gm.
  • Example 13 A tool 100 was manufactured in the same manner as in Example 1 except that the composite material powder was prepared using TiC powder with a particle size of 120 ⁇ m and martensitic stainless steel powder with a particle size of 50 gm. Except for preparing composite powder from powder, a tool 100 is manufactured in a method basically the same as in Example 1.
  • Example 14 Except for preparing composite powder from SiC powder with a particle size of 50gm and martensitic stainless steel powder with a particle size of 50gm, a tool 100 is manufactured in a method basically the same as in Example 1.
  • Example 15 Except for preparing composite powder from ZrCh powder with a particle size of 50gm and martensitic stainless steel powder with a particle size of 50gm, a tool 100 is manufactured in a method basically the same as in Example 1.
  • Example 16 Except for preparing composite powder from Al2O3 powder with a particle size of 50gm and martensitic stainless steel powder with a particle size of 50gm, a tool 100 is manufactured in a method basically the same as in Example 1.
  • Example 17 Except for preparing composite powder from Si3N4 powder with a particle size of 50gm and martensitic stainless steel powder with a particle size of 50gm, a tool 100 is manufactured in a method basically the same as in Example 1. Comparative Example 1: Ordinary martensitic tool. The evaluation method is:
  • Durable sharpness test Durable sharpness adopts the simulated tool life test method. The larger the value of the durable sharpness, the longer the durable sharpness life, and the smaller the value of the durable sharpness, the opposite.
  • the specific method is as follows:
  • the simulated tool life test method is as follows: The tested tool edge is fixed horizontally on the tool fixing device with the cutting edge downward, and after adding the silicon code, it is pressed on the simulation with a pressure of 16N.
  • the cutting simulation (3mm kraft paper) remains stationary, and the tool fixing device is driven by the motor and air pressure to drive the tool to cut in the X-axis direction, with a reciprocating speed of 50mm/s, and at the same time, it rises in the Z-axis direction and moves 1mm in the Y-axis direction to shape the simulation.
  • the cutting stroke is 100mm, and it ends after cutting the simulation 5 times.
  • the evaluation object ham sausage
  • the knife's long-lasting sharpness is determined. The test is terminated when the object cannot be cut. The total number of cuts from the start to the end of the test is recorded, which is the knife's long-lasting sharpness. The more the total number of cuts, the higher the long-lasting sharpness.
  • Example 5 Comparing the test results of the cutting tools of Example 1 and Example 5, it was found that although the durable sharpness of Example 5 was slightly improved, the high mass percentage of hard ceramic particles caused a significant decrease in the strength of the blade. . Normally, the impact toughness of the blade is required to be no less than 40 J/cm 3 . Based on Example 4, it can be seen that the mass percentage of hard ceramic particles is preferably no more than 30%. Comparing the test results of the cutting tools of Example 1 and Example 6 with reference to Comparative Example 1, it is found that the mass percentage of hard ceramic particles in Example 6 is too low, resulting in a small improvement in the lasting sharpness. Combined with Example 2, it can be seen that the mass percentage of hard ceramic particles is preferably not less than 10% to significantly improve the lasting sharpness of the tool.
  • the particle size of the hard ceramic particles is preferably greater than 20 pm in order to significantly enhance the lasting sharpness of the blade portion 20 . Comparing the test results of the cutting tools of Example 1 and Example 13, it was found that the durable sharpness of Example 13 was not improved well, and the strength of the blade was greatly reduced, confirming that the particle size of the hard ceramic particles is larger than Although the long-lasting sharpness can still be improved to a certain extent in the case of 100pm, its excessively large particle size will lead to a significant decrease in the strength of the blade.
  • the test results of the cutting tools of Examples 8 to 12 are compared with Comparative Example 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

L'invention concerne un couteau (100) et son procédé de fabrication. Le couteau (100) comprend : une partie corps (10) constituée d'un matériau de matrice ou d'un matériau composite ; et une partie lame (20), qui est constituée du matériau composite et jointe à la partie corps (10), le matériau composite comprenant le matériau de matrice et des particules de céramique dure réparties uniformément dans le matériau de matrice, et les particules de céramique dure ayant un point de fusion plus élevé que le matériau de matrice. Le couteau (100) présente un tranchant durable amélioré.
PCT/IB2023/059495 2022-09-29 2023-09-26 Couteau et son procédé de fabrication WO2024069386A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211213503.8A CN115533968A (zh) 2022-09-29 2022-09-29 刀具及其制造方法
CN202211213503.8 2022-09-29

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WO2024069386A1 true WO2024069386A1 (fr) 2024-04-04

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PCT/IB2023/059495 WO2024069386A1 (fr) 2022-09-29 2023-09-26 Couteau et son procédé de fabrication

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WO (1) WO2024069386A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115533968A (zh) * 2022-09-29 2022-12-30 武汉苏泊尔炊具有限公司 刀具及其制造方法

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JP2006271959A (ja) * 2005-03-03 2006-10-12 Kyocera Corp セラミック製刃物
CN106077584A (zh) * 2016-06-23 2016-11-09 奇男子五金制品（浙江）有限公司 超硬耐磨复合刀片的制备方法
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CN114559045A (zh) * 2022-03-01 2022-05-31 广东凯利德科技有限公司 新型奥氏体不锈钢厨用刀具的生产方法及低碳高铬马氏体合金粉末
CN114656257A (zh) * 2020-12-22 2022-06-24 武汉苏泊尔炊具有限公司 陶瓷刀具及其制造方法
CN114716245A (zh) * 2020-12-22 2022-07-08 武汉苏泊尔炊具有限公司 陶瓷刀具及其制造方法
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WO2017138792A1 (fr) * 2016-02-12 2017-08-17 강제임스 Lame pour instrument de coupe ayant un bord d'une forme irrégulière de taille micrométrique, et instrument de coupe ayant une lame

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6315935B1 (en) * 1999-08-26 2001-11-13 Alliedsignal Inc. Low pressure injection molding of knife blades from metal feedstocks
JP2006271959A (ja) * 2005-03-03 2006-10-12 Kyocera Corp セラミック製刃物
CN107405775A (zh) * 2015-05-25 2017-11-28 京瓷株式会社 陶瓷刀具
CN110154091A (zh) * 2015-06-22 2019-08-23 京瓷株式会社 刀具
CN106077584A (zh) * 2016-06-23 2016-11-09 奇男子五金制品（浙江）有限公司 超硬耐磨复合刀片的制备方法
US20190321992A1 (en) * 2016-12-26 2019-10-24 Kyocera Corporation Knife
CN111055308A (zh) * 2019-10-24 2020-04-24 黄发强 一种刀刃结构、刀刃结构的制造方法及厨刀
CN114656257A (zh) * 2020-12-22 2022-06-24 武汉苏泊尔炊具有限公司 陶瓷刀具及其制造方法
CN114716245A (zh) * 2020-12-22 2022-07-08 武汉苏泊尔炊具有限公司 陶瓷刀具及其制造方法
CN114559045A (zh) * 2022-03-01 2022-05-31 广东凯利德科技有限公司 新型奥氏体不锈钢厨用刀具的生产方法及低碳高铬马氏体合金粉末
CN115094413A (zh) * 2022-05-13 2022-09-23 阳江合金材料实验室 基于激光熔覆钛合金粉末的高端纯钛刀具及其制备方法
CN115533968A (zh) * 2022-09-29 2022-12-30 武汉苏泊尔炊具有限公司 刀具及其制造方法

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