EP0503966A2 - Procédé pour la préparation d'articles frittés - Google Patents

Procédé pour la préparation d'articles frittés Download PDF

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Publication number
EP0503966A2
EP0503966A2 EP92302189A EP92302189A EP0503966A2 EP 0503966 A2 EP0503966 A2 EP 0503966A2 EP 92302189 A EP92302189 A EP 92302189A EP 92302189 A EP92302189 A EP 92302189A EP 0503966 A2 EP0503966 A2 EP 0503966A2
Authority
EP
European Patent Office
Prior art keywords
binder
debinding
amount
atmosphere
oxygen
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP92302189A
Other languages
German (de)
English (en)
Other versions
EP0503966A3 (en
Inventor
Yoshihiko c/o Fujitsu Limited Seyama
Tsutomu c/o Fujitsu Limited Iikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0503966A2 publication Critical patent/EP0503966A2/fr
Publication of EP0503966A3 publication Critical patent/EP0503966A3/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
    • 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
    • B22F3/1017—Multiple heating or additional steps
    • B22F3/1021—Removal of binder or filler
    • B22F3/1025—Removal of binder or filler not by heating 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
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • the conventional processes have a defect in that the degree of freedom in selecting a material is limited.
  • the degree of freedom in selecting the material is high in the case of an atomized powder, the particle size distribution or surface conditions of the powder particles differ for each lot, and the surface oxidation conditions also differ, and thus the kind or amount of binder must be adjusted for each obtained lot.
  • the conventional processes have a drawback in that, when the properties of a powder are not suitable for injection molding, the powder cannot be used as the starting raw powder.
  • the recovery by the atomized process of fine powder with an average particle diameter of less than 20 ⁇ m is as low as less than 10% of a charge, the cost of the starting raw powder becomes very high.
  • a process for the production of a sintered body comprising mixing a plurality of powders with different average particle diameters and particle size distributions to prepare a starting raw powder with a tap density of 40% or more, kneading the obtained starting raw powder with less than 38% by volume of a binder to obtain a mixture and injection molding the mixture to obtain a molded body, debinding the molded body in an atmosphere containing 1 to 30% of oxygen, and finally sintering the molded body in a reducing atmosphere.
  • the debinding may be carried out under pressure.
  • PE has no compatibility with PMMA, and the softening points of these substances are different; that of wax is 80°C and that of PMMA is 140°C.
  • the temperature is lowered to 100°C, and wax is poured into the kneaded body and again kneaded. Thereafter, the finally obtained kneaded body is injection molded.
  • Figure 5 shows the relationship between the amount of oxygen in the debinding atmosphere and the shortest total debinding time during which a good debound body can be obtained.
  • the amount of oxygen in the debinding atmosphere was 0%, if the total debinding the is less than 24 hours, a good debound body could not be obtained by any temperature profile.
  • the amount of oxygen in the debinding atmosphere was between 1 and 30%, a good debound body was obtained over the total debinding time of 12 hours (not pressurized).
  • the amount of oxygen in the debinding atmosphere was 50%, a good debound body was obtained over the total debinding time of 24 hours or more.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nanotechnology (AREA)
  • Powder Metallurgy (AREA)
EP19920302189 1991-03-14 1992-03-13 Process for production of sintered body Withdrawn EP0503966A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3049767A JPH04285102A (ja) 1991-03-14 1991-03-14 焼結体の製造方法
JP49767/91 1991-03-14

Publications (2)

Publication Number Publication Date
EP0503966A2 true EP0503966A2 (fr) 1992-09-16
EP0503966A3 EP0503966A3 (en) 1993-04-14

Family

ID=12840327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920302189 Withdrawn EP0503966A3 (en) 1991-03-14 1992-03-13 Process for production of sintered body

Country Status (2)

Country Link
EP (1) EP0503966A3 (fr)
JP (1) JPH04285102A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000012247A1 (fr) * 1998-08-27 2000-03-09 Alliedsignal Inc. Procede d'elimination du liant et de frittage de pieces moulees par injection de metal et fabriquees avec un liant aqueux
WO2001021347A1 (fr) * 1999-09-23 2001-03-29 Rockwell Science Center, Llc Fabrication directe de pieces metalliques
US8427034B2 (en) 2009-04-27 2013-04-23 Mohawk Carpet Corporation Flooring systems and methods of making and using same
CN112453408A (zh) * 2020-11-06 2021-03-09 东莞华晶粉末冶金有限公司 一种不锈钢高密度电子产品壳体制备方法
CN115178733A (zh) * 2022-05-12 2022-10-14 南京晨光集团有限责任公司 高功率选区激光熔化用大粒径粉末评价及循环使用方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6585930B2 (en) * 2001-04-25 2003-07-01 Extrude Hone Corporation Method for article fabrication using carbohydrate binder
JP2003193108A (ja) * 2002-12-09 2003-07-09 Seiko Epson Corp 金属焼結体の製造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816002A (ja) * 1981-07-21 1983-01-29 Namiki Precision Jewel Co Ltd 樹脂結合永久磁石の製造方法
GB2198433A (en) * 1986-12-05 1988-06-15 Romain Louis Billiet Removal of organic binding agents from articles moulded from sinterable materials
JPH02145704A (ja) * 1988-11-24 1990-06-05 Sanyo Chem Ind Ltd 成形用組成物
US4948426A (en) * 1989-10-17 1990-08-14 Sumitomo Metal Mining Company Limited Sintering metal powder and a process for making a sintered metal product
JPH02294403A (ja) * 1989-05-09 1990-12-05 Kawasaki Steel Corp 射出成形性、焼結性に優れる射出成形用金属粉末およびその製造方法ならびに金属粉末射出成形用コンパウンド
JPH03104801A (ja) * 1989-09-20 1991-05-01 Fujitsu Ltd 射出成形方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63223104A (ja) * 1987-03-12 1988-09-16 Sekometsukusu Kk 焼結超硬合金製品の製造方法
JPH01319601A (ja) * 1988-06-20 1989-12-25 Tokin Corp 焼結金属の製造方法
JP2613457B2 (ja) * 1988-11-18 1997-05-28 セイコー電子工業株式会社 射出成形用バインダーの除去方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816002A (ja) * 1981-07-21 1983-01-29 Namiki Precision Jewel Co Ltd 樹脂結合永久磁石の製造方法
GB2198433A (en) * 1986-12-05 1988-06-15 Romain Louis Billiet Removal of organic binding agents from articles moulded from sinterable materials
JPH02145704A (ja) * 1988-11-24 1990-06-05 Sanyo Chem Ind Ltd 成形用組成物
JPH02294403A (ja) * 1989-05-09 1990-12-05 Kawasaki Steel Corp 射出成形性、焼結性に優れる射出成形用金属粉末およびその製造方法ならびに金属粉末射出成形用コンパウンド
JPH03104801A (ja) * 1989-09-20 1991-05-01 Fujitsu Ltd 射出成形方法
US4948426A (en) * 1989-10-17 1990-08-14 Sumitomo Metal Mining Company Limited Sintering metal powder and a process for making a sintered metal product

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Derwent Publications Ltd., London, GB; AN 91-174160 & JP-A-3 104 801 (FUJITSU LTD) 1 May 1991 *
PATENT ABSTRACTS OF JAPAN vol. 007, no. 092 (M-208)16 April 1983 & JP-A-58 016 002 ( NAMIKI SEIMITSU HOUSEKI KK ) 29 January 1983. *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 388 (M-1014)22 August 1990 & JP-A-02 145 704 ( SANYO CHEM IND LTD ) 5 June 1990 *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 069 (M-1083)19 February 1991 & JP-A-02 294 403 ( KAWASAKI STEEL CORP ) 5 December 1990 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000012247A1 (fr) * 1998-08-27 2000-03-09 Alliedsignal Inc. Procede d'elimination du liant et de frittage de pieces moulees par injection de metal et fabriquees avec un liant aqueux
WO2001021347A1 (fr) * 1999-09-23 2001-03-29 Rockwell Science Center, Llc Fabrication directe de pieces metalliques
US8427034B2 (en) 2009-04-27 2013-04-23 Mohawk Carpet Corporation Flooring systems and methods of making and using same
CN112453408A (zh) * 2020-11-06 2021-03-09 东莞华晶粉末冶金有限公司 一种不锈钢高密度电子产品壳体制备方法
CN115178733A (zh) * 2022-05-12 2022-10-14 南京晨光集团有限责任公司 高功率选区激光熔化用大粒径粉末评价及循环使用方法
CN115178733B (zh) * 2022-05-12 2024-03-22 南京晨光集团有限责任公司 高功率选区激光熔化用大粒径粉末评价及循环使用方法

Also Published As

Publication number Publication date
JPH04285102A (ja) 1992-10-09
EP0503966A3 (en) 1993-04-14

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