DE295726C - - Google Patents
Info
- Publication number
- DE295726C DE295726C DENDAT295726D DE295726DA DE295726C DE 295726 C DE295726 C DE 295726C DE NDAT295726 D DENDAT295726 D DE NDAT295726D DE 295726D A DE295726D A DE 295726DA DE 295726 C DE295726 C DE 295726C
- Authority
- DE
- Germany
- Prior art keywords
- carbide
- molybdenum
- crystallization
- metal
- heating
- 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.)
- Active
Links
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910039444 MoC Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 2
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims 1
- 238000006011 modification reaction Methods 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 description 6
- 230000005712 crystallization Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N Tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/949—Tungsten or molybdenum carbides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/02—Amorphous compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Carbon And Carbon Compounds (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Durch das Patent 289066 ist ein Verfahren zur Herstellung beliebig großer Stücke von beliebiger Form aus Wolfram- und Molybdäncarbid oder aus einer Mischung dieser Carbide für Werkzeuge und Gebrauchsgegenstände aller Art geschützt worden, wonach die in bekannter Weise durch Schmelzen im Kohletiegel gewonnenen Carbide in bekannter Weise feinst gepulvert werden, worauf aus diesem Pulver durch Pressen in Kohleformen Formstücke hergestellt werden, die hierauf in einem Ofen bis dicht an den Schmelzpunkt der Carbide erhitzt werden, bis ein neuer Kristallisationsprozeß eintritt, der die ganze Masse nach und nach durchdringt und ein mechanisch fester und dichter Körper entstanden ist.By the patent 289066 is a method for the production of arbitrarily large pieces of any shape made from tungsten and molybdenum carbide or from a mixture of these carbides for tools and utensils of all kinds have been protected, according to which the known in Carbide obtained by melting in a coal crucible is very fine in a known manner be powdered, whereupon from this powder molded pieces by pressing in charcoal molds are prepared, which are then placed in an oven until close to the melting point of the carbides be heated until a new crystallization process occurs, which gradually affects the whole mass after penetrating and a mechanically solid and dense body has arisen.
Nach diesem Verfahren ist es möglich, Formstücke von großer mechanischer Festigkeit herzustellen, die im Bruch ein kristallinisches Gefüge zeigen.With this method it is possible to produce shaped pieces with great mechanical strength, which show a crystalline structure when broken.
Das kristallinische Gefüge der so hergestellten Formstücke ist für einige Zwecke, z. B. Ziehmatrizen, Schneidwerkzeuge, Bohrer usw., sehr wenig geeignet, und ist für die hier angeführten Zwecke ein mehr amorphes Gefüge erwünscht.The crystalline structure of the molded pieces so produced is useful for some purposes, e.g. B. Drawing dies, cutting tools, drills, etc., are very unsuitable and are suitable for those listed here Purposes a more amorphous structure is desirable.
In dem Zusatzpatent 295656 ist nun schon einIn the additional patent 295656 is now already a
Verfahren beschrieben, nach welchem solche Wolframcarbidkörper mit amorphem Gefüge dadurch erhalten werden können, daß die zweite Erhitzung nicht bis zum Eintritt der Kristallisation durchgeführt wird.Process described by which such tungsten carbide bodies with an amorphous structure can be obtained in that the second heating does not occur until the occurrence of the Crystallization is carried out.
Dieses Arbeitsverfahren macht die genaue ständige Beobachtung der herzustellenden Formstücke und die Innehaltung einer ganz bestimmten Temperatur erforderlich, was große Übung und große Aufmerksamkeit des Arbeiters erfordert.This working method makes the precise constant observation of the manufactured Fittings and keeping a very specific temperature required, which is great Requires practice and great attention from the worker.
Da Wolframcarbid schätzungsweise bei etwa 2300 bis 2400 ° schmilzt, so liegt die Temperatur, bei der eine Kristallisation vermieden werden kann, bei etwa 2200°.Since tungsten carbide is estimated to melt at around 2300 to 2400 °, the temperature is at which crystallization can be avoided, at around 2200 °.
Bei der Ausübung des vorliegenden Verfahrens können auch andere Temperaturen in Frage kommen, da diese nur schätzungsweise angegeben werden können.When practicing the present process, other temperatures can also be used come, as these can only be given as an estimate.
Nach dem vorliegenden Verfahren kann nun die Kristallisation der Formstücke bei der zweiten Erhitzung auch dadurch vermieden werden, daß dem gepulverten Carbid einige Prozent Molybdänoxyd, Molybdänmetall oder Molybdäncarbid zugesetzt wird.According to the present process, the crystallization of the shaped pieces can now be achieved in the Second heating can also be avoided by the fact that the powdered carbide some Percent molybdenum oxide, molybdenum metal or molybdenum carbide is added.
Durch diesen Zusatz braucht die Temperatur nicht in so eng beschränkten GrenzenThis addition means that the temperature does not need to be within such narrowly restricted limits
gehalte.Vffdn, um die Kristallisation zu ver-ίί meiden/ i.^ufch ist hierdurch ein besseres und leichte.re|;?Atbeiten ermöglicht.held.Vffdn, in order to avoid crystallization / i. ^ ufch is hereby a better and easier.re |; ? Working enabled.
Es^/i.st allerdings bei der Herstellung von 5 Forms|üc}cen aus Metallcarbid schon vorgeschl^geii ,worden, dem gepulverten Metallcarbid freies^Metall zuzusetzen.It ^ / i.st, however, in the production of 5 forms made of metal carbide have already been proposed to add free metal to the powdered metal carbide.
./B^i /allen diesen Verfahren wird aber der./B^i / but the ./B^i /
} ZvMt^ von freien Metallen als Bindemittel } ZvMt ^ of free metals as binders
ίο beifujfet, um einen mechanisch festen Körper , aus /Metallcarbid herzustellen.ίο beifujfet to a mechanically solid body to manufacture from / metal carbide.
f e !j ^iach dem vorliegenden Verfahren dient dieser Zusatz aber nicht als Bindemittel, sondern zur Vermeidung der Kristallisation der Metallcarbide. lg f e ! According to the present process, however, this addition does not serve as a binding agent, but rather to avoid crystallization of the metal carbides. lg
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE295726C true DE295726C (en) |
Family
ID=550177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT295726D Active DE295726C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE295726C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1103598B (en) * | 1952-12-29 | 1961-03-30 | Renault | Process for the production of wear-resistant, auxiliary metal-free, sintered hard metal alloys |
| DE3247902A1 (en) * | 1982-12-24 | 1984-07-05 | Georg 7310 Plochingen Barthelmä | Wire-drawing machine |
| DE3247903A1 (en) * | 1982-12-24 | 1984-07-05 | Georg 7310 Plochingen Barthelmä | Wire-drawing machine |
-
0
- DE DENDAT295726D patent/DE295726C/de active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1103598B (en) * | 1952-12-29 | 1961-03-30 | Renault | Process for the production of wear-resistant, auxiliary metal-free, sintered hard metal alloys |
| DE3247902A1 (en) * | 1982-12-24 | 1984-07-05 | Georg 7310 Plochingen Barthelmä | Wire-drawing machine |
| DE3247903A1 (en) * | 1982-12-24 | 1984-07-05 | Georg 7310 Plochingen Barthelmä | Wire-drawing machine |
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