US20070231181A1 - Method of manufacturing sintered body - Google Patents

Method of manufacturing sintered body Download PDF

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Publication number
US20070231181A1
US20070231181A1 US11/728,598 US72859807A US2007231181A1 US 20070231181 A1 US20070231181 A1 US 20070231181A1 US 72859807 A US72859807 A US 72859807A US 2007231181 A1 US2007231181 A1 US 2007231181A1
Authority
US
United States
Prior art keywords
compact
sintered body
metal powder
gas
atmosphere
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.)
Abandoned
Application number
US11/728,598
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English (en)
Inventor
Hidefumi Nakamura
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Assigned to SEIKO EPSON CORPORATION reassignment SEIKO EPSON CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NAKAMURA, HIDEFUMI
Publication of US20070231181A1 publication Critical patent/US20070231181A1/en
Abandoned 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
    • B22F3/10—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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • 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

  • Kneading conditions vary depending upon various conditions including the metal composition or the particle diameter of a metal powder to be used, the composition of an organic binder, and the amounts of the metal powder and the organic binder to be mixed.
  • the kneading temperature is in a range of about 50° C. to about 200° C.
  • the kneading time is in a range of about 15 minutes to about 210 minutes.
  • injection molding is performed on the kneaded compound produced in the process 1) or pellets granulated from the kneaded compound by an injection molding machine.
  • a primary compact having a desired shape and size is produced.
  • by properly selecting a forming die it is possible to produce a primary compact having a complicated shape with ease.
  • the organic binder may not be removed completely by the degrease process. For example, a portion of the organic binder may be left in the compact at the time of completion of the degrease process.
  • a secondary compact is placed in a hermetically sealed space. Therefore, once H 2 and O 2 contained in the atmosphere are consumed by reactions with carbon in the secondary compact, further consumption of carbon in the secondary compact can be prevented.
  • the secondary compact can be baked while carbon in the secondary compact can be prevented or inhibited from being reduced. Hence, it is possible to produce a sintered body having a desired carbon content with ease.
  • the secondary compact is placed in a hermetically sealed space within a closed vessel or the like.
  • the pressure of the hermetically sealed space is adjusted to 60 kPa to 140 kPa (450 Torr to 1,050 Torr). This pressure can be maintained sufficiently with a simple closed vessel because of a small difference from an atmospheric pressure.
  • the secondary compacts 30 are placed on the stage 14 .
  • the opening portion 12 is closed by the cover 20 .
  • the gas discharge valve 17 and the gas supply valve 15 are opened.
  • the internal furnace space 13 is filled with an atmosphere gas that meets the aforementioned conditions.
  • the pressure in the internal furnace space 13 may be reduced by a vacuum pump or the like as needed. In such a case, it is possible to enhance the purity of the atmosphere gas in the internal furnace space 13 .

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
US11/728,598 2006-04-03 2007-03-26 Method of manufacturing sintered body Abandoned US20070231181A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006102560A JP4285495B2 (ja) 2006-04-03 2006-04-03 焼結体の製造方法
JP2006-102560 2006-04-03

Publications (1)

Publication Number Publication Date
US20070231181A1 true US20070231181A1 (en) 2007-10-04

Family

ID=38559212

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/728,598 Abandoned US20070231181A1 (en) 2006-04-03 2007-03-26 Method of manufacturing sintered body

Country Status (3)

Country Link
US (1) US20070231181A1 (zh)
JP (1) JP4285495B2 (zh)
CN (1) CN101049632A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9073121B2 (en) 2010-05-11 2015-07-07 Seiko Epson Corporation Method for producing sintered compact
WO2020139325A1 (en) * 2018-12-26 2020-07-02 Hewlett-Packard Development Company, L.P. Tracer gas endpoint-monitored sinter systems

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5428213B2 (ja) * 2008-06-18 2014-02-26 セイコーエプソン株式会社 焼結体の製造方法
JP2013087361A (ja) * 2011-10-24 2013-05-13 Hitachi Powdered Metals Co Ltd 微小部品およびその製造方法
JP2021008931A (ja) * 2019-07-02 2021-01-28 Ntn株式会社 焼結軸受および焼結軸受の製造方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448747A (en) * 1981-09-01 1984-05-15 Kabushiki Kaisha Kobe Seiko Sho High density sintering method for powder molded products
US4840665A (en) * 1986-01-14 1989-06-20 Sumitomo Electric Industries, Ltd. Wear-resistant sintered iron-based alloy and process for producing the same
US4885133A (en) * 1986-01-14 1989-12-05 Sumitomo Electric Industries, Ltd. Wear-resistant sintered iron-based alloy and process for producing the same
US5328657A (en) * 1992-02-26 1994-07-12 Drexel University Method of molding metal particles
US6482352B1 (en) * 1999-10-20 2002-11-19 Injex Corporation Method of manufacturing watch-bracelet component
US6514307B2 (en) * 2000-08-31 2003-02-04 Kawasaki Steel Corporation Iron-based sintered powder metal body, manufacturing method thereof and manufacturing method of iron-based sintered component with high strength and high density
US20030215349A1 (en) * 2002-02-28 2003-11-20 Hitachi Unisia Automotive, Ltd. Production method of high density iron based forged part
US6696015B2 (en) * 1999-03-03 2004-02-24 Sumitomo Special Metals Co., Ltd. Method for producing rare-earth magnet
US6969014B2 (en) * 2003-04-24 2005-11-29 Lechler Gmbh Two-substance spray nozzle

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4448747A (en) * 1981-09-01 1984-05-15 Kabushiki Kaisha Kobe Seiko Sho High density sintering method for powder molded products
US4840665A (en) * 1986-01-14 1989-06-20 Sumitomo Electric Industries, Ltd. Wear-resistant sintered iron-based alloy and process for producing the same
US4885133A (en) * 1986-01-14 1989-12-05 Sumitomo Electric Industries, Ltd. Wear-resistant sintered iron-based alloy and process for producing the same
US5328657A (en) * 1992-02-26 1994-07-12 Drexel University Method of molding metal particles
US6696015B2 (en) * 1999-03-03 2004-02-24 Sumitomo Special Metals Co., Ltd. Method for producing rare-earth magnet
US6482352B1 (en) * 1999-10-20 2002-11-19 Injex Corporation Method of manufacturing watch-bracelet component
US6514307B2 (en) * 2000-08-31 2003-02-04 Kawasaki Steel Corporation Iron-based sintered powder metal body, manufacturing method thereof and manufacturing method of iron-based sintered component with high strength and high density
US20030215349A1 (en) * 2002-02-28 2003-11-20 Hitachi Unisia Automotive, Ltd. Production method of high density iron based forged part
US6969014B2 (en) * 2003-04-24 2005-11-29 Lechler Gmbh Two-substance spray nozzle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9073121B2 (en) 2010-05-11 2015-07-07 Seiko Epson Corporation Method for producing sintered compact
WO2020139325A1 (en) * 2018-12-26 2020-07-02 Hewlett-Packard Development Company, L.P. Tracer gas endpoint-monitored sinter systems
US11865618B2 (en) 2018-12-26 2024-01-09 Hewlett-Packard Development Company, L.P. Tracer gas endpoint-monitored sinter systems

Also Published As

Publication number Publication date
JP2007277603A (ja) 2007-10-25
JP4285495B2 (ja) 2009-06-24
CN101049632A (zh) 2007-10-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SEIKO EPSON CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NAKAMURA, HIDEFUMI;REEL/FRAME:019149/0823

Effective date: 20070307

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION