WO2020022652A1 - Cylindres de laminage fabriqués par assemblage et imprégnation sous pression de matériaux dissemblables et procédé de fabrication s'y rapportant - Google Patents

Cylindres de laminage fabriqués par assemblage et imprégnation sous pression de matériaux dissemblables et procédé de fabrication s'y rapportant Download PDF

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Publication number
WO2020022652A1
WO2020022652A1 PCT/KR2019/007480 KR2019007480W WO2020022652A1 WO 2020022652 A1 WO2020022652 A1 WO 2020022652A1 KR 2019007480 W KR2019007480 W KR 2019007480W WO 2020022652 A1 WO2020022652 A1 WO 2020022652A1
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WO
WIPO (PCT)
Prior art keywords
preform
rolling roll
steel
powder
manufacturing
Prior art date
Application number
PCT/KR2019/007480
Other languages
English (en)
Korean (ko)
Inventor
김대하
이원혁
이상관
서동우
홍현욱
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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Publication date
Application filed by 주식회사 디에이티신소재 filed Critical 주식회사 디에이티신소재
Publication of WO2020022652A1 publication Critical patent/WO2020022652A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • 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
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • 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
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/18—Rolls or rollers
    • 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
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
    • B22F2007/042—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal characterised by the layer forming method
    • B22F2007/045—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal characterised by the layer forming method accompanied by fusion or impregnation

Definitions

  • the present invention relates to a rolling roll manufactured using a dissimilar material bonding and pressure impregnation process, and a method for manufacturing the same, and more specifically, to an outer layer portion of a base material and a preform impregnated using the pressure impregnation process of the present invention.
  • the present invention relates to a rolling roll including an inner layer part made of steel bonded to the outer layer part, and a manufacturing method thereof.
  • Types of rolls used for rolling include Ductile Cast Iron (DCI) rolls, Adamite rolls, Chilled casting rolls, High Speed Steel (HSS) rolls, and carbide (TC) rolls. Tungsten Carbide) rolls.
  • DCI Ductile Cast Iron
  • HSS High Speed Steel
  • TC carbide
  • Tungsten Carbide Tungsten Carbide rolls.
  • the cemented carbide roll has an advantage of high productivity because it has a longer wear life than the roll of other materials.
  • the carbide roll has a high hardness, the appearance of the produced product is beautiful, it is possible to produce a good quality product with excellent shape accuracy and uniformity. With these many advantages, carbide rolls are the most important rolls in rolling.
  • the conventional method of manufacturing such a carbide roll is as follows. First, the shape of the roll by cold hydrostatic pressing (CIP, Cold Isostatic Pressing) or die pressing process by mixing tungsten carbide (WC) powder and a certain amount of binder powder (cobalt, nickel and chromium, etc.) After forming the sintering step, the cemented roll may be manufactured by hot isostatic pressing (HIP, Hot Isostatic Pressing) treatment to remove residual pores for quality improvement.
  • HIP Hot Isostatic Pressing
  • Republic of Korea Publication No. 2014-0045639 discloses a rolling roll manufacturing method and a rolling roll accordingly.
  • the prior art does not disclose a method for manufacturing a rolled roll manufactured by press-impregnating a cermet containing ceramic particles in a matrix composed of a metal and an alloy together with advantages of the metal and the ceramic.
  • the core of the impregnation mold for forming the hollow portion of the rolling roll is broken, so that the base material is moved to an empty area of the core where the base material is not used during the pressure impregnation without using the mold core. Problem occurs.
  • an object of the present invention is to provide a rolling roll manufacturing method and a rolling roll manufactured thereby, which can prevent movement of an unused core to an empty area during press impregnation when the rolling roll is manufactured by a pressure impregnation process. It is.
  • Another object of the present invention is to provide a rolling roll excellent in workability and a low cost rolling roll and a manufacturing method thereof.
  • the manufacturing method of the rolling roll using the dissimilar material bonding and pressure impregnation process of the present invention comprises the steps of: forming a preform having a hollow portion with a powder containing TiC; Filling the preform into a cavity provided in the impregnation mold to form an outer layer part; Inserting steel into the hollow part of the preform to form an inner layer part; A base material filling step of filling a base material on an upper portion of the preform filled in the cavity; And pressing the preform, the base material and the steel to impregnate the base material into the preform, and joining and pressing impregnating dissimilar materials to which the preform and the steel are joined.
  • the powder further comprises a tool steel powder comprising at least one selected from the group consisting of STD 11, STD 61, SKH 2 and SKH 9 can do.
  • the steel is characterized in that S20C.
  • the base material is made of the same metal as the tool steel-based powder, characterized in that formed by pressure impregnation in the preform.
  • the base material is characterized in that it is formed by pressure impregnation at a temperature of 1,500 to 1,700 °C and pressure of more than 100 atm.
  • the rolling roll of the present invention comprises a tool steel-based powder and titanium carbide (TiC) powder, the preform having a hollow portion to form an outer layer; A base member made of the same metal as the tool steel powder and press-impregnated in the preform; And a steel inserted into the hollow part of the preform to form an inner layer part.
  • TiC titanium carbide
  • the tool steel powder may include at least one selected from the group consisting of STD 11, STD 61, SKH 2 and SKH 9.
  • the steel is characterized in that S20C.
  • the base material is made of the same metal as the tool steel-based powder, characterized in that formed by pressing impregnated into the preform.
  • the rolling roll manufactured using the dissimilar material bonding and pressure impregnation process of the present invention and a manufacturing method thereof since the core of the impregnation mold for forming the hollow part of the rolling roll is broken, a mold core is used. While the base material is moved to the hollow region during the pressure impregnation, the steel of the inner layer bonded to the outer layer portion of the press-impregnated base material and the preform prevents the movement of the base material to the hollow part during the pressure impregnation process.
  • the outer layer portion of the rolling roll is composed of a pressure-impregnated base material and a preform to realize wear resistance
  • the inner layer portion that does not need wear resistance is made of steel of HRC 20 to produce a rolling roll at a high hardness of the conventional HRC 50 Difficulties in machinability due to the machining of low hardness steel of the inner layer of HRC 20 has an excellent effect that can be improved machinability and machinability.
  • FIG. 1 is a schematic diagram of a melt pressure impregnation process according to an embodiment of the present invention.
  • Figure 2 is a photograph of the core of the impregnation mold for forming the hollow portion of the rolling roll when the roll is manufactured by a conventional pressure impregnation process.
  • Figure 3 is a schematic diagram of a process for manufacturing a rolling roll using a dissimilar material bonding and pressure impregnation process according to an embodiment of the present invention.
  • Figure 4 is a surface photograph of the outer layer portion, inner layer portion and the bonding interface of the rolling roll according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a melt pressure impregnation process according to an embodiment of the present invention.
  • the wear-resistant cermet 100 includes a preform 200 and a base 300.
  • Cermet is a compound word of ceramic and metal, and metal and alloy are matrix in a wide range, and it includes ceramic particles, which have the advantages of metal and ceramic. .
  • the preform 200 may include tool steel-based powder, titanium carbide (TiC) powder, and polymer resin including at least one selected from the group consisting of STD 11, STD 61, SKH 2, and SKH 9.
  • the tool steel powder may include a stainless alloy, but is not limited thereto.
  • the stainless alloy system may be martensite type or precipitation hardening type.
  • STD 11 and STD 61 are alloy oral materials and include Fe, C, Si, Mn, P, S, Cr, Mo, and V as main components.
  • SKH 2 and SKH9 are high speed steels.
  • the tool steel 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 an effect of suppressing breakage of the preform due to thermal shock during impregnation.
  • Figure 2 is a photograph of the core of the impregnation mold for forming the hollow portion of the rolling roll when the roll is manufactured by a conventional pressure impregnation process.
  • the rolling roll of the present invention may include a preform to form the outer layer portion, the base material press-impregnated inside the preform and the steel to form the inner layer portion. have.
  • the preform includes a tool steel-based powder and titanium carbide (TiC) powder and includes a hollow portion to form an outer layer portion.
  • TiC titanium carbide
  • the tool steel powder may include at least one selected from the group consisting of STD 11, STD 61, SKH 2 and SKH 9.
  • the base material is made of the same metal as the tool steel powder, and is pressure impregnated into the preform.
  • the steel is inserted into the hollow part of the preform to form an inner layer part.
  • the steel is preferably S20C.
  • the steel is joined to the outer layer formed by pressure impregnation of the base member by the pressure impregnation process.
  • the steel forming the inner layer part of the rolling roll prevents the base material from moving to the inner layer part of the rolling roll.
  • Figure 3 is a schematic diagram of a process for manufacturing a rolling roll using a heterogeneous material bonding and pressure impregnation process according to an embodiment of the present invention
  • Figure 4 is an outer layer portion, inner layer portion of the rolling roll according to an embodiment of the present invention. And a photograph of the surface of the bonding interface.
  • the method for manufacturing a rolling roll using a dissimilar material bonding and pressure impregnation process comprises the steps of forming a preform (S10), forming an outer layer portion (S20), forming an inner layer portion It may include a step (S30), the base material filling step (S40) and the dissimilar material bonding and pressure impregnation step (S50).
  • Forming the preform (S10) forms a preform having a hollow part with a powder containing TiC.
  • the powder may further include a tool steel powder including at least one selected from the group consisting of STD 11, STD 61, SKH 2, and SKH 9.
  • the preform is filled in a cavity provided in the impregnation mold to form the outer layer part.
  • Forming the inner layer portion (S30) is to insert the steel in the hollow portion of the preform to form an inner layer portion.
  • the steel is preferably S20C.
  • the base material filling step S40 the base material is filled in the upper part of the preform filled in the cavity.
  • the dissimilar material bonding and pressure impregnation step (S50) is the base material is impregnated into the preform by pressing the preform, the base material and the steel, the preform and the steel are bonded.
  • the base material is made of the same metal as the tool steel powder, and is formed by being pressure impregnated into the preform. At this time, the base material is formed by pressurized impregnation at a temperature of 1,500 to 1,700 °C and a pressure of more than 100 atm.
  • the base member moves to the hollow part region during the pressure impregnation without using the mold core, During the impregnation process, the steel impregnated with the pressurized impregnated base material and the inner layer part joined to the outer layer part of the preform prevents the movement of the base material to the hollow part.
  • the outer layer portion of the rolling roll is composed of a pressure-impregnated base material and a preform to realize wear resistance
  • the inner layer portion that does not need wear resistance is made of steel of HRC 20 to produce a rolling roll at a high hardness of the conventional HRC 50 Difficulties in machinability due to the machining of low hardness steel of the inner layer of HRC 20 has an excellent effect that can be improved machinability and machinability.
  • a ball mill process using SUS seat was applied to mix the powder uniformly, and the mixed powder and heptane (heptane) were charged into the SUS seat, and the process was performed for 48 hr at a speed of 200 rpm.
  • the powder was collected by adding a binder of 4% and then dried to recover the powder using a 325 mesh sieve, and the hollow molded body was formed using a molding die and a pressure press to form an outer layer part of a rolling roll having a filling rate of 60%.
  • the preform of was molded.
  • the preform was preliminarily sintered for 1 hour in a degreasing sintering furnace in which a vacuum atmosphere of 5 ⁇ 10 ⁇ 2 Torr and a temperature of 1100 ° C. was maintained, and then cooled to room temperature in a sintering furnace.
  • the internal steel of S20C to form the inner layer was inserted into the hollow part of the preform, which was pre-sintered, loaded into the alumina mold for impregnation, and the STD11 bulk material was placed on the preform and then loaded into the pressure impregnation equipment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Powder Metallurgy (AREA)

Abstract

La présente invention concerne des cylindres de laminage fabriqués par assemblage et imprégnation sous pression de matériaux dissemblables et un procédé de fabrication s'y rapportant et, plus précisément, le procédé de fabrication comprend : une étape consistant à mouler un produit pré-moulé, qui comprend une partie creuse, à l'aide d'une poudre comprenant du TiC ; une étape consistant à former une partie couche externe par introduction du produit pré-moulé dans une cavité disposée dans un moule pour imprégnation ; une étape consistant à former une partie couche interne par introduction d'acier dans la partie creuse du produit pré-moulé ; une étape d'introduction de matériau de matrice consistant à introduire un matériau de matrice sur la partie supérieure du produit pré-moulé introduit dans la cavité ; et une étape d'assemblage et d'imprégnation sous pression de matériaux dissemblables consistant à presser le produit pré-moulé, le matériau de matrice et l'acier de manière à imprégner le matériau de matrice dans le produit pré-moulé et à assembler le produit pré-moulé et l'acier.
PCT/KR2019/007480 2018-07-26 2019-06-21 Cylindres de laminage fabriqués par assemblage et imprégnation sous pression de matériaux dissemblables et procédé de fabrication s'y rapportant WO2020022652A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180087210A KR102148026B1 (ko) 2018-07-26 2018-07-26 이종재료 접합 및 가압 함침 공정을 이용하여 제조된 압연롤 및 그 제조방법
KR10-2018-0087210 2018-07-26

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2581793B2 (ja) * 1989-03-20 1997-02-12 日立粉末冶金株式会社 焼結部材の溶浸接合方法
JP2680616B2 (ja) * 1988-08-03 1997-11-19 日立金属株式会社 複合ロール
JP2003193210A (ja) * 2001-12-26 2003-07-09 Am Technology:Kk 一体構造の異種複合材料
KR100587495B1 (ko) * 2006-02-16 2006-06-12 주식회사알로이틱 내마모성 초경합금-스틸 접합체 및 그 제조방법
KR20140130793A (ko) * 2013-05-02 2014-11-12 한국기계연구원 고경도 복합재료 및 이의 제조방법
KR101505372B1 (ko) * 2014-07-15 2015-03-23 주식회사 대화알로이테크 써멧 및 그 제조 방법

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61238902A (ja) * 1985-04-16 1986-10-24 Amada Co Ltd 溶解材と金属粉末との接合材料品の製造方法
KR101391462B1 (ko) 2012-10-09 2014-05-07 주식회사 쎄타텍 압연 롤 제조방법 및 그에 따른 압연 롤

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2680616B2 (ja) * 1988-08-03 1997-11-19 日立金属株式会社 複合ロール
JP2581793B2 (ja) * 1989-03-20 1997-02-12 日立粉末冶金株式会社 焼結部材の溶浸接合方法
JP2003193210A (ja) * 2001-12-26 2003-07-09 Am Technology:Kk 一体構造の異種複合材料
KR100587495B1 (ko) * 2006-02-16 2006-06-12 주식회사알로이틱 내마모성 초경합금-스틸 접합체 및 그 제조방법
KR20140130793A (ko) * 2013-05-02 2014-11-12 한국기계연구원 고경도 복합재료 및 이의 제조방법
KR101505372B1 (ko) * 2014-07-15 2015-03-23 주식회사 대화알로이테크 써멧 및 그 제조 방법

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KR102148026B1 (ko) 2020-08-26

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