DE1508470A1 - High vacuum sintering furnace - Google Patents

High vacuum sintering furnace

Info

Publication number
DE1508470A1
DE1508470A1 DE19661508470 DE1508470A DE1508470A1 DE 1508470 A1 DE1508470 A1 DE 1508470A1 DE 19661508470 DE19661508470 DE 19661508470 DE 1508470 A DE1508470 A DE 1508470A DE 1508470 A1 DE1508470 A1 DE 1508470A1
Authority
DE
Germany
Prior art keywords
sintering furnace
furnace
high vacuum
pipeline
vacuum sintering
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.)
Pending
Application number
DE19661508470
Other languages
German (de)
Inventor
Scheibe Dr Werner
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.)
Evonik Operations GmbH
Original Assignee
Degussa 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 Degussa GmbH filed Critical Degussa GmbH
Publication of DE1508470A1 publication Critical patent/DE1508470A1/en
Pending 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
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional steps
    • B22F3/1021—Removal of binder or filler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere

Description

DEUTSCHE GOLD- UND SILBERSCHEIDEANSTALTGERMAN GOLD AND SILVER CUTTERS

vormals Roessler Frankfurt/Main, Veissfrauenetr. 9formerly Roessler Frankfurt / Main, Veissfrauenetr. 9

Hochvakuum - SinterofenHigh vacuum sintering furnace

Gegenstand der Erfindung ist ein Hochvakuum-Sinterofen, bei dem das zu sinternde Material in innerhalb' der Ofenkammer in einem Tiegel angeordnet ist»The invention relates to a high-vacuum sintering furnace, in which the material to be sintered in within 'the furnace chamber in one Crucible is arranged »

Bisher war bei der pulvermetallurgischen Herstellung von Hartmetallen folgendes Verfahren üblich:So far was in the powder metallurgical production of hard metals the following procedure is common:

0^s Hartmetallpulver wurde unter Zusatz von Wachs oder Stearaten 2U Formstücken verpresst· Die Stearate wurden anschliessend in einem Ofen bei ca. hoo C ausgetrieben und das Hartmetall dann bei ca. 1ooo C vorgesintert. Die Chargen wurden dann dem Ofen fntnommen und den Presslingen» die in diesem Zustand noch bearoeitbar sind, die endgültige Form und Abmessung gegeben· Schliessl,ich gelangt das Material in den eigentlichen Sinterofen und U£rd bei ca. 1500 C fertig gesintert.0 ^ s carbide powder with the addition of wax or stearates 2U fittings pressed · The Stearate were then driven off in an oven at about hoo C and the carbide then sintered at approximately 1ooo C. The batches were then removed from the furnace and the compacts, which can still be handled in this state, were given their final shape and dimensions.

Man ist heute allgemein bestrebt, diese zwei Ofenfahrten zu vermeiden. Durch etwas mehr Aufwand bei der Presstechnik kann erreicht werden, dass die Teile nach dem Vorsintern nicht mehr bearbeitet zu werden brauchen*Today, efforts are generally made to avoid these two kiln trips. With a little more effort in the pressing technique, it can be achieved that the parts are no longer processed after pre-sintering to become need *

Gegenstand der, Erfindung ist ein Sinterofen, mit dem die der Er- fi adung zugrundeligende Aufgabe in besonders einfacher Weise dadurch geleistet wird, dass an den das zu sinternde Material aufnehmenden Tiegel eine die aus dem zu sinternden Material austretenden Dämpfe aufnehmende Rohrleitung angeschlossen ist.Object of the, invention is a sintering furnace with which the ER f i adung zugrundeligende object in a particularly simple manner is achieved in that the a, the receiving of the exiting material to be sintered vapor piping is connected, the receiving material to be sintered crucible.

In der Abbildung ist eine beispielsweise Ausführung der Erfindung dargestellt. Sie besteht aus einem Vakuumofen 1, in dem das zu Sinternde Material in einem Grafittiegel 2, angeordnet ist und Ue? durch eine Induktionsspule 3 beheizt wird. Der Tiegel besitzt eine MessÖffnung k. Der ofen wird dusch eine öffnung 5 evakuuiert· beschriebene Anordnung arbeitet in folgender WeisetAn example embodiment of the invention is shown in the figure. It consists of a vacuum furnace 1 in which the material to be sintered is arranged in a graphite crucible 2 and Ue? is heated by an induction coil 3. The crucible has a measuring opening k. The oven is evacuated by an opening 5. The arrangement described works in the following manner

909844/0772909844/0772

Badbath

Das Material wird, wie üblich,- in Sinterofen chargiert· Der oben offene Tiegel 2, in dem eich die Charge befindet» erhält im Boden ein Loch, in das ein Grafitrohr 6 eingeschraubt wird. Dieses Grafitrohr ragt in ein von unten an den Ofen angeflanschtes Metallrohr 7 so. hinein, dass es nahezu gasdicht abschlieast. Ausserhalb des Ofens besitzt das Stahlrohr ein Ventil 8· Der Ofen wird nunmehr evakuiert und durch den Gaseinlass 9 Bit einem Inerten Glas geflutet. Sodann wird das Ventil 8 am Stahlrohr geöffnet und ein Gasdurchfluss von ca· Io l/min eingestellt· Der Ofen wird auf i»oo°C geheizt, wobei die Steaa*· verdampfen und durch den Gasstrom aus dem Ofen herausgespult werden. Die Dämpfe können dann entweder abgefackelt oder über «ine beheizte Leitung Io in einen Kondensator 11 geleitet werden«The material is charged, as usual, in a sintering furnace. The crucible 2, open at the top, in which the charge is located, has a hole in the bottom into which a graphite tube 6 is screwed. This graphite tube protrudes into a metal tube 7 flanged to the furnace from below. so that it closes almost gas-tight. Outside the furnace, the steel tube has a valve 8. The furnace is now evacuated and flooded with an inert glass through the gas inlet 9 bit. The valve 8 on the steel pipe is then opened and a gas flow rate of approx. 10 l / min is set. The furnace is heated to 100 ° C., the steaa * evaporate and the gas flow spooling them out of the furnace. The vapors can then either be flared or fed into a condenser 11 via a heated line Io.

Ist der Verdampfungsprozess beendet, wird das Gaszufluss·» und ' Gasabflussventil geschlossen und der Ofen evakuiert· Die restlichen etwa noch vorhandenen Spuren von Stearaten werden der Charge durch das Vakuum entzogen· Sie sind jedoch so geringfügig, dass die Gefahr einer Verschmutzung des Ofens oder der Pumpen nicht mehr besteht.Once the evaporation process has ended, the gas flow · »and ' Gas drain valve closed and the oven evacuated · The remainder Any traces of stearates that may still be present are removed from the batch by the vacuum, but they are so minor that that there is no longer any risk of contamination of the furnace or the pumps.

Schliesslich wird der Ofen auf Sintertemperatur hochgeheizt und die Charge fertig gesintert.Finally the furnace is heated to sintering temperature and the batch is completely sintered.

- 3 r- 3 r

909844/0772909844/0772

Claims (1)

PatentansprücheClaims BoiogexemplarBoiog copy Daif nicht geändert werdenDaif cannot be changed 1· Hochvakuua-Sinterofen, dadurch gekennzeichnet, dass der das zu sinternde Material aufnehmende Tiegel an einer Rohrleitung angeschlossen 1st« die die aus den zu sinternden Material austretenden Däepfe abfuhrt. 1 · High vacuum sintering furnace, characterized in that the to sintering material receiving crucible connected to a pipeline Is «which carries away the vapors emerging from the material to be sintered. 2* Hochvakuu««rSinterofen nach Anspruch 1, dadurch gekennzeichnet, dass an de« Tiegel eine Rohrleitung befestigt ist, die in eine aus dee Ofen ragende Rohrleitung hineinragt.2 * high vacuum sintering furnace according to claim 1, characterized in that that a pipeline is attached to the crucible which protrudes into a pipeline protruding from the furnace. 3· HochTakuua-Sinterofen nach Anspruch 1 daduroh gekennzeichnet, dass an der Daapf· abführenden Rohrleitung ein Kondensator angeschlossen ist.3 · HochTakuua sintering furnace according to claim 1 daduroh characterized in that a condenser is connected to the pipeline leading off the Daapf is. Prankfurt/Main, den 2o.12.1966
Sohn/saPrankfurt / Main, December 20th, 1966
Son / sa 909844/0-772909844 / 0-772 LeerseiteBlank page
DE19661508470 1966-12-22 1966-12-22 High vacuum sintering furnace Pending DE1508470A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0051842 1966-12-22

Publications (1)

Publication Number Publication Date
DE1508470A1 true DE1508470A1 (en) 1969-10-30

Family

ID=7053697

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19661508470 Pending DE1508470A1 (en) 1966-12-22 1966-12-22 High vacuum sintering furnace

Country Status (2)

Country Link
DE (1) DE1508470A1 (en)
FR (1) FR1552321A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2813758A1 (en) * 1977-03-30 1978-10-05 Sumitomo Electric Industries SINTER FURNACE FOR POWDER METALLURGY AND PROCESSES FOR SINTERING AND HEAT TREATMENT OF CEMENTED CARBIDES IN SUCH A SINTER FURNACE
DE3205501A1 (en) * 1982-02-16 1983-08-25 Degussa Ag, 6000 Frankfurt Vacuum furnace for dewaxing and sintering hard metals
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5403540A (en) * 1990-10-29 1995-04-04 Corning Incorporated Heating of formed metal structure by induction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2813758A1 (en) * 1977-03-30 1978-10-05 Sumitomo Electric Industries SINTER FURNACE FOR POWDER METALLURGY AND PROCESSES FOR SINTERING AND HEAT TREATMENT OF CEMENTED CARBIDES IN SUCH A SINTER FURNACE
DE3205501A1 (en) * 1982-02-16 1983-08-25 Degussa Ag, 6000 Frankfurt Vacuum furnace for dewaxing and sintering hard metals
AT383069B (en) * 1982-02-16 1987-05-11 Degussa VACUUM OVEN FOR DEWARNING AND SINTERING HARD METALS
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

Also Published As

Publication number Publication date
FR1552321A (en) 1969-01-03

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