GB1370274A - Method and apparatus for sintering compacts of powder materials - Google Patents

Method and apparatus for sintering compacts of powder materials

Info

Publication number
GB1370274A
GB1370274A GB1006673A GB1006673A GB1370274A GB 1370274 A GB1370274 A GB 1370274A GB 1006673 A GB1006673 A GB 1006673A GB 1006673 A GB1006673 A GB 1006673A GB 1370274 A GB1370274 A GB 1370274A
Authority
GB
United Kingdom
Prior art keywords
compacts
valves
sintering
furnace
valve
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.)
Expired
Application number
GB1006673A
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.)
Leybold Heraeus Verwaltung GmbH
Original Assignee
Leybold Heraeus Verwaltung GmbH
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 Leybold Heraeus Verwaltung GmbH filed Critical Leybold Heraeus Verwaltung GmbH
Publication of GB1370274A publication Critical patent/GB1370274A/en
Expired legal-status Critical Current

Links

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
    • B22F3/003—Apparatus, e.g. furnaces
    • 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

Abstract

1370274 Vacuum sintering powder compacts LEYBOLD-HERAEUSVERWALTUNG GmbH 1 March 1973 [5 May 1972] 10066/73 Heading C7D A process of vacuum sintering powder compacts e.g. metal or WC, comprises pre-heating the compacts in a vacuum chamber at 100‹ -800‹ C while recirculating a purging gas through the compacts and a separator where the hydrocarbons volatilized from the compacts are deposited. The recirculation is then stopped and the dewaxed compacts are vacuum sintered in the furnace. As shown in the Figure the powder compacts e.g. WC containing 2% paraffin are stacked on trays 6 enclosed by a perforated cylinder 7, a heating cylinder 12 and radiation screens 35 within a vacuum furnace 1 surrounded by induction coil 5. The furnace is evacuated via pipe 18 and pumps 38. Recirculating pipe 17 branches off pipe 18 and leads via surface contact heat exchanger 19 nozzle 23, cyclone gas solids separator 20 and compressor/blower 21 back to the furnace 1. Inert gas is introduced at 31. By suitable operation of valves 25, 26, 27, 29, 30, 37, 40 by-pass circuit 39 can be brought into use to reduce the system pressure during purging until it reaches the level required for sintering; valves 25, 26 can be closed to empty and clean exchanger 19 and cyclone 20; at the end of sintering the charge is cooled by circulating inert gas through by-pass circuit 28 via heat exchanger 32. The process is started by closing valves 29, 30, 40 and opening valves 25, 26, 27, 37 and evacuating to 10<SP>-2</SP> torr via pumps 38. Valve 37 was then closed. Argon was introduced at 31 to 200 torrs, compressor 21 and induction coil 5 were started and the gas circulated. After ¢ hour, valve 40 was opened and the system pressure reduced to 10<SP>-1</SP> torr while the temperature reached 800‹ C. Valves 25, 26, 40 were closed, valve 37 reopened, pressure reduced to 10<SP>-3</SP> torr and the temperature raised to 1400‹ C after ¢ hour sintering, valve 37 was closed, inert gas was admitted at 31 and cooling of the charge was effected by opening valves 29, 30 and starting blower 21.
GB1006673A 1972-05-05 1973-03-01 Method and apparatus for sintering compacts of powder materials Expired GB1370274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2222050A DE2222050B2 (en) 1972-05-05 1972-05-05 Method and device for vacuum sintering pressed bodies containing hydrocarbons from powdered starting materials

Publications (1)

Publication Number Publication Date
GB1370274A true GB1370274A (en) 1974-10-16

Family

ID=5844149

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1006673A Expired GB1370274A (en) 1972-05-05 1973-03-01 Method and apparatus for sintering compacts of powder materials

Country Status (8)

Country Link
US (1) US3871630A (en)
JP (1) JPS5137881B2 (en)
AT (1) AT329885B (en)
CH (1) CH543915A (en)
DE (1) DE2222050B2 (en)
FR (1) FR2189152A1 (en)
GB (1) GB1370274A (en)
SE (1) SE389283B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032404A1 (en) * 1980-01-14 1981-07-22 WITEC Cayman Patents Ltd. Method and means for removing binder from a green body
GB2292750A (en) * 1992-06-02 1996-03-06 Advanced Materials Technology Metal injection-moulding
CN108031846A (en) * 2017-12-11 2018-05-15 昆明理工大学 A kind of airflow circulating heating and filtering device for SLM processes

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS589806B2 (en) * 1977-03-30 1983-02-23 住友電気工業株式会社 Sintering furnace for powder metallurgy
US4124199A (en) * 1977-07-11 1978-11-07 Abar Corporation Process and apparatus for case hardening of ferrous metal work pieces
DE2924287C2 (en) * 1979-06-15 1983-08-11 Viktor Fedorovi&ccaron; &Scaron;ilin Process for the production of highly refractory ceramic products based on spinel
US5262122A (en) * 1980-01-14 1993-11-16 Witec Cayman Patents, Ltd. Manufacture of parts from particulate material
DE3205501A1 (en) * 1982-02-16 1983-08-25 Degussa Ag, 6000 Frankfurt Vacuum furnace for dewaxing and sintering hard metals
SE453183B (en) * 1982-05-04 1988-01-18 Svenska Silikatforskning PROCEDURE FOR REDUCING TIME BY REMOVING TEMPORA BINDERS FROM A FORMATED BODY
GB2198433B (en) * 1986-12-05 1990-11-07 Romain Louis Billiet Improvements in or relating to the removal of organic binding agents from articles moulded from sinterable materials
US5122326A (en) * 1987-03-02 1992-06-16 Vacuum Industries Inc. Method of removing binder material from shaped articles under vacuum pressure conditions
US5603071A (en) * 1989-09-14 1997-02-11 Sumitomo Electric Industries, Ltd. Method of preparing cemented carbide or cermet alloy
JP2643002B2 (en) * 1990-03-08 1997-08-20 川崎製鉄株式会社 Degreasing method for powder compacts
DE4317291C1 (en) * 1993-05-25 1994-08-04 Umwelt Technics Nord Gmbh Method and device for separating volatile components from a base material
DE4319166C2 (en) * 1993-06-09 2002-02-14 Ald Vacuum Techn Ag Process and device for cleaning, in particular degreasing and compacting of electrically conductive material
DE19923197C2 (en) * 1999-05-20 2001-09-06 Ald Vacuum Techn Ag Method and device for sintering a batch of compacts from particles
DE19939765C1 (en) * 1999-08-21 2001-03-01 Ald Vacuum Techn Ag Device for dewaxing sintered material
US7544322B2 (en) * 2005-07-07 2009-06-09 Onera (Office National D'etudes Et De Recherches Aerospatiales) Process for the pressureless sintering of metal alloys; and application to the manufacture of hollow spheres
JP4589941B2 (en) * 2007-05-29 2010-12-01 エスペック株式会社 Heat treatment equipment
DE102008052571A1 (en) * 2007-10-25 2009-04-30 Von Ardenne Anlagentechnik Gmbh Diffusion oven useful in semiconductor manufacture and for doping solar cells, comprises reactor enclosed by reaction pipe, outer casing, heating elements, means for locking the pipe, means for locking the casing and vacuum producing means
WO2013167289A1 (en) * 2012-05-05 2013-11-14 Wdt-Wolz-Dental-Technik Gmbh Sintered insert for a sintering furnace for the oxygen-free sintering of metal or ceramic material
CN104096839B (en) * 2014-06-16 2016-02-10 宁波渝鑫金属粉末科技有限公司 A kind of method of metal powder vacuum sinter molding
AT516081B1 (en) * 2014-07-16 2018-02-15 Lkr Leichtmetallkompetenzzentrum Ranshofen Gmbh Method and device for cleaning a porous material
EP3045253A1 (en) 2015-01-19 2016-07-20 PVA Industrial Vacuum Systems GmbH Device and method for releasing binder from solder masses in vacuum brazing furnaces
EP3328552B1 (en) * 2015-07-27 2021-09-08 DMG Mori Seiki USA Powder delivery system for additive manufacturing apparatus
CN107538005B (en) * 2017-08-18 2019-03-08 重庆市河海碳素制品有限公司 A kind of energy-saving sintering furnace
US20230114036A1 (en) * 2020-02-28 2023-04-13 Desktop Metal, Inc. Low-Cost High-Purity Vacuum Pumps and Systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565575A (en) * 1923-12-24 1925-12-15 Samuel S Levy Machine for molding concrete blocks
IT364899A (en) * 1937-08-27
CH406792A (en) * 1964-01-09 1966-01-31 Balzers Patent Beteilig Ag Furnace for the treatment of wax-bound moldings to be sintered
US3654374A (en) * 1969-07-25 1972-04-04 Adamas Carbide Corp Apparatus for and method of de-waxing, presintering and sintering powdered metal compacts
US3708285A (en) * 1971-01-14 1973-01-02 Adamas Carbide Corp Apparatus for and method of de-waxing,presintering and sintering powdered metal compacts
US3769008A (en) * 1971-05-19 1973-10-30 B Borok Method for sintering workpieces of pressed powdered refractory metal or alloy and vacuum furnace for performing the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032404A1 (en) * 1980-01-14 1981-07-22 WITEC Cayman Patents Ltd. Method and means for removing binder from a green body
GB2292750A (en) * 1992-06-02 1996-03-06 Advanced Materials Technology Metal injection-moulding
GB2292750B (en) * 1992-06-02 1996-12-04 Advanced Materials Tech Method of forming metal injection-moulded article
CN108031846A (en) * 2017-12-11 2018-05-15 昆明理工大学 A kind of airflow circulating heating and filtering device for SLM processes
CN108031846B (en) * 2017-12-11 2019-09-27 昆明理工大学 A kind of airflow circulating heating and filtering device for SLM process

Also Published As

Publication number Publication date
ATA189773A (en) 1975-08-15
SE389283B (en) 1976-11-01
JPS4961009A (en) 1974-06-13
CH543915A (en) 1973-11-15
DE2222050B2 (en) 1975-08-21
DE2222050A1 (en) 1973-11-15
US3871630A (en) 1975-03-18
JPS5137881B2 (en) 1976-10-19
AT329885B (en) 1976-06-10
FR2189152A1 (en) 1974-01-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee