DE748036C - Sintered hard material - Google Patents
Sintered hard materialInfo
- Publication number
- DE748036C DE748036C DEM149213D DEM0149213D DE748036C DE 748036 C DE748036 C DE 748036C DE M149213 D DEM149213 D DE M149213D DE M0149213 D DEM0149213 D DE M0149213D DE 748036 C DE748036 C DE 748036C
- Authority
- DE
- Germany
- Prior art keywords
- oxide
- iron
- hard
- mixture
- hard material
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
Description
Gesinterter Hartstoff Geigenstand der Erfindung ist ein gesinterter Hartstoff, der vorzugsweise seiner Hauptmenge nach aus einem harten Oxyd, wie Aluminiumoxyd, besteht, der Rest dagegen aus einem Bindemittel, .das aus Eisen oder einem ähnlichen Metall und Sauerstoff in :einer Zusammensetzung, die zwischen reinem Eisen und Eisenoxyd der Formel Fee 0s liegt, besteht. Es hat sich gezeigt, daß ein solches Bindemittel sehr feste harte Körper ergibt, anscheinend in der Weise, daß an der Trennunigsstelre zwischen Eisen und Aluminiumoxyd eine Schicht von Eisenoxyd durch Bildung von Mischkristallen mit Aluminiumoxyd eine gute Verbindung herstellt, während andererseits Ü"bergangs:stufen zwischen Eisenoxyd und Eisen sich bilden, die auch zum Metall eine gute Verbindung ergeben, während das Metall selbst dann vermutlich die eigentliche zähe und feste Bindung des Körpers ermöglicht. Mischungen von Aluminiumoxyd und Eisenoxyd ergeben bei der Sinterung jedenfalls nicht- ebenso günstige Resultate, ebensowenig tun 'dies Mischungen von Aluminiumoxyd und Eisenpulver.Sintered hard material violin stand of the invention is a sintered one Hard material, the main amount of which is preferably composed of a hard oxide such as aluminum oxide, consists, the rest, however, from a binding agent. That of iron or something similar Metal and Oxygen in: a composition between pure iron and iron oxide the formula fee 0s exists. It has been shown that such a binder results in very solid hard bodies, apparently in such a way that at the Trennunigsstelre between iron and aluminum oxide a layer of iron oxide through the formation of mixed crystals Establishes a good connection with aluminum oxide, while on the other hand transition: stages between iron oxide and iron, which also form a good bond with the metal result, while the metal itself is believed to be the actual tough and firm Binding of the body allows. Mixtures of aluminum oxide and iron oxide result in any case not equally favorable results in sintering, just as little do this Mixtures of aluminum oxide and iron powder.
Bei der Herstellung solcher Körper kann man verschiedene Wege einschlagen. Man kann aus einer Mischung, von Eisenpulver und Aluminiumoxyd Formkörper pressen und diese dann, vorzugsweise nach einer\7orsinterung in reduzierender Atmosphäre, in oxydierender Atmosphäre brennen. Nach der Vorsinterung kann gegebenenfalls eine endgültige Formgebung in bekannter Weise durch Feilen usw. eingeschaltet werden. Oder man stellt aus einer Mischung von, hartem Oxyd und Eisenoxyd durch Pressen Formkörper her und sintert diese in einer mäßig reduzierenden Atmosphäre, z. B. in Luft oder Stickstoff mit beigemischtem Kohlenoxyd oder Kohlenwasserstoff, vorzugsweise nachdem man vorher in oxydierender Atmosphäre vorgesintert-hat. Oder man sintert das harte Oxyd zusammen mit einer Mischung von Eisenpulver mit Eisenoxyd oder einem anderen Oxyd des Eisens in indifferenter Atmosphäre, oder man mischt das harte Oxyd mit Eisenoxydul oder Eisenoxyduloxyd oder einem Gemisch verschiedener Eisenoxyde und sintert, sei es in indifferenter, sei es in schwach reduzierender Atmosphäre. Eine weitere Möglichkeit besteht darin, daß Aluminiumoxyd nach Beimischung von wenig Eisenoxyd erhitzt wird, um eine Bindung zwischen beiden zu erzielenk,, und dann das erhaltene Pulver mit metäl.ll-; schem Eisen oder einem anderen Metall (Aluminium, Nickel) gemischt und gesintert wird, wobei je nach den Mischungsverhältnissen reduzierende, indifferente oder oxydierende Atmosphäre zweckmäßig sein kann. Allgemein gesprochen braucht das Bindemetall nicht dasselbe Metall zu sein wie in dem die Verbindung mit Alu-m,inilamoyd ,bewiikenden Metalloxyd.There are various ways of making such bodies. You can press moldings from a mixture of iron powder and aluminum oxide and then, preferably after sintering in a reducing atmosphere, burn in an oxidizing atmosphere. After pre-sintering, a final shape can be switched on in a known manner by filing, etc. Or a mixture of hard oxide and iron oxide is produced by pressing Molded bodies and sintered them in a moderately reducing atmosphere, e.g. B. in air or nitrogen with added carbon oxide or hydrocarbon, preferably after pre-sintering in an oxidizing atmosphere. Or you sinter the hard oxide together with a mixture of iron powder with iron oxide or one another oxide of iron in an indifferent atmosphere, or one mixes the hard oxide with iron oxide or iron oxide or a mixture of different Iron oxides and sinters, be it indifferent or weakly reducing The atmosphere. Another possibility is that aluminum oxide after admixture is heated by a little iron oxide in order to achieve a bond between the two. and then the powder obtained with metäl.ll-; iron or other metal (Aluminum, nickel) is mixed and sintered, depending on the mixing ratios reducing, indifferent or oxidizing atmosphere can be appropriate. Generally speaking, the binding metal need not be the same metal as that in which it is Combination with Alu-m, inilamoyd, coating metal oxide.
Als Beispiele seien gegeben: z. Eine Mischung von 8o1/0 Aluminiumoxyd. und 2o0/0 Eisenoxyd wird in mäßig reduzierender Atmosphäre gesintert.Examples are: A mixture of 8o1 / 0 aluminum oxide. and 2o0 / 0 iron oxide is sintered in a moderately reducing atmosphere.
2. Eine Mischung von 85"/, Aluminiumoxyd und i5% Eisenpulvcr wird in reduzierender Atmosphäre vorgesintert, dann in oxydierender Atmosphäre bei hoher Temperatur gebrannt, z. B. bei 1700°.2. A mixture of 85% aluminum oxide and 15% iron powder is made Pre-sintered in a reducing atmosphere, then in an oxidizing atmosphere at a high Burned temperature, e.g. B. at 1700 °.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM149213D DE748036C (en) | 1940-11-24 | 1940-11-24 | Sintered hard material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM149213D DE748036C (en) | 1940-11-24 | 1940-11-24 | Sintered hard material |
Publications (1)
Publication Number | Publication Date |
---|---|
DE748036C true DE748036C (en) | 1944-10-25 |
Family
ID=7336649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM149213D Expired DE748036C (en) | 1940-11-24 | 1940-11-24 | Sintered hard material |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE748036C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE935178C (en) * | 1940-06-30 | 1955-11-10 | Franz Dr Phil Dr Mont H Skaupy | Hard body |
DE935240C (en) * | 1952-03-08 | 1955-11-17 | Eisen & Stahlind Ag | Sintered materials |
DE937821C (en) * | 1952-04-03 | 1956-01-19 | Siemens Ag | Extrusion press, in particular cable jacketing press |
DE963766C (en) * | 1948-10-13 | 1957-05-09 | Onera (Off Nat Aerospatiale) | Material from sintered mixtures of aluminum oxide and metals for parts of thermal power machines |
DE1118078B (en) * | 1958-02-05 | 1961-11-23 | Degussa | Hard material body and process for its production |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE639257C (en) * | 1934-05-18 | 1936-12-02 | Patra Patent Treuhand | Process for the production of cutting tools for glass u. like |
DE687398C (en) * | 1938-03-19 | 1940-01-29 | Fried Krupp Akt Ges | |
DE687397C (en) * | 1937-06-22 | 1940-01-29 | Fried Krupp Akt Ges |
-
1940
- 1940-11-24 DE DEM149213D patent/DE748036C/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE639257C (en) * | 1934-05-18 | 1936-12-02 | Patra Patent Treuhand | Process for the production of cutting tools for glass u. like |
DE687397C (en) * | 1937-06-22 | 1940-01-29 | Fried Krupp Akt Ges | |
DE687398C (en) * | 1938-03-19 | 1940-01-29 | Fried Krupp Akt Ges |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE935178C (en) * | 1940-06-30 | 1955-11-10 | Franz Dr Phil Dr Mont H Skaupy | Hard body |
DE963766C (en) * | 1948-10-13 | 1957-05-09 | Onera (Off Nat Aerospatiale) | Material from sintered mixtures of aluminum oxide and metals for parts of thermal power machines |
DE935240C (en) * | 1952-03-08 | 1955-11-17 | Eisen & Stahlind Ag | Sintered materials |
DE937821C (en) * | 1952-04-03 | 1956-01-19 | Siemens Ag | Extrusion press, in particular cable jacketing press |
DE1118078B (en) * | 1958-02-05 | 1961-11-23 | Degussa | Hard material body and process for its production |
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