DE3025533C1 - Compound sintering process - Google Patents
Compound sintering processInfo
- Publication number
- DE3025533C1 DE3025533C1 DE19803025533 DE3025533A DE3025533C1 DE 3025533 C1 DE3025533 C1 DE 3025533C1 DE 19803025533 DE19803025533 DE 19803025533 DE 3025533 A DE3025533 A DE 3025533A DE 3025533 C1 DE3025533 C1 DE 3025533C1
- Authority
- DE
- Germany
- Prior art keywords
- bodies
- compact
- sintering
- pressed
- weight
- 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
- 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
- C22C29/067—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 comprising a particular metallic binder
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- 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
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- 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
-
- 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
Description
Es ist noch ein weiteres Verfahren bekannt (DE-PS 21 39 738), bei dem ein Verbundkörper aus zwei verschiedenen Materialien in der Weise hergestellt werden kann, daß eine Schüttung der verschiedenen Pulver in zwei Lagen erfolgt, diese dann gepreßt und anschließend gesintert werden. Dieses Verfahren There is still another method known (DE-PS 21 39 738), at which a composite body made of two different materials in the way it can be that the various powders are poured in two layers, these are then pressed and then sintered. This method
ermöglicht jedoch nur die Herstellung eines pulvermetallurgischen Verbunderzeugnisses, nicht jedoch die Verbindung eines pulvermetallurgischen Erzeugnisses mit einem Kompaktkörper.however, only allows the production of a powder metallurgical one Composite product, but not the combination of a powder metallurgical product with a compact body.
In der DE-PS 29 28 792 wird vorgeschlagen, daß ein Preßkörper aus einem Werkstoff mit mindestens einem bei Sintertemperatur eine flüssige Phase bildenden Bestandteil drucklos und direkt auf die Oberfläche eines kompakten Körpers aufgesetzt und beide Teile durch Sintern im Vakuum oder unter Schutzgas bei einer unterhalb der Liquidustemperatur des kompakten Körpers liegenden Temperatur fest miteinander verbunden werden. Die Sinterung erfolgt also ohne Druckanwendung, ohne Zwischenlage (Lot) und ohne mechanische Bearbeitung der Kontaktflächen. Die Sintertemperatur liegt je nach Art der Werkstoffe im Bereich von 1 100 bis 1400o C. In DE-PS 29 28 792 it is proposed that a pressed body from a material with at least one liquid phase that forms at sintering temperature Component placed without pressure and directly on the surface of a compact body and both parts by sintering in a vacuum or under protective gas with one below the temperature of the liquidus temperature of the compact body get connected. The sintering takes place without the application of pressure, without an intermediate layer (Solder) and without mechanical processing of the contact surfaces. The sintering temperature depends on the type of material in the range from 1,100 to 1,400o C.
Der Erfindung liegt die Aufgabe zugrunde, ein möglichst wirtschaftliches, also kostengünstiges Verfahren anzugeben, mit dem es möglich ist, einen zähen, festen kompakten Körper, z. B. aus Stahl, mit einem hochverschleißfesten pulvermetallurgisch hergestellten Körper aus einer Hartstofflegierung zu paaren und dabei durch geeignete Maßnahmen die Sintertemperatur zu senken und die Schwindung des Preßkörpers möglichst gering zu halten. The invention is based on the object of providing the most economical, So to specify a cost-effective process with which it is possible to produce a tough, solid compact body, e.g. B. made of steel, with a highly wear-resistant powder metallurgy Manufactured body made of a hard alloy to pair and thereby through suitable Measures to lower the sintering temperature and the shrinkage of the compact as possible to keep it low.
Die Aufgabe wird erfindungsgemäß durch Zusatz von 2 bis 4% Aluminium und/oder 2 bis 4% Kupfer in Pulverform als flüssige Phase bildender Bestandteil zu der Mischung, aus der der Preßkörper hergestellt wird, gelöst. The object is achieved according to the invention by adding 2 to 4% aluminum and / or 2 to 4% copper in powder form as the component forming the liquid phase to the mixture from which the compact is made.
Vorteilhafte Anwendungen für das erfindungsgemäße Verfahren sind in den Unteransprüchen gekennzeichnet. Advantageous applications for the method according to the invention are characterized in the subclaims.
Es wurde festgestellt. daß die hochkarbidhaltigen Hartlegierungen nicht durch Kohlenstoff, sondern durch Kupfer und Aluminium in ihrem Sinterverhalten zu niedrigen Temperaturen geführt werden können, ohne daß die Eigenschaften negativ beeinflußt werden. It was determined. that the high-carbide hard alloys not by carbon, but by copper and aluminum in their sintering behavior can be carried out to low temperatures without adversely affecting the properties to be influenced.
Der Schwund muß bei der Sinterung der Hartstofflegierung möglichst klein sein, um Spannungen oder gar einen Bruch zu verhindern. Dies gelingt durch den erfindungsgemäßen Zustand von Aluminium und/oder Kupfer in der angegebenen Menge.The shrinkage must be as possible during the sintering of the hard material alloy be small to prevent tension or even breakage. This works through the state of aluminum and / or copper according to the invention in the specified amount.
Anhand der folgenden Beispiele wird die Erfindung erläutert. The invention is illustrated by the following examples.
Beispiel 1 Ein 10 mm dicker Preßkörper aus 60% Titankarbid und einem austenitischen Binder mit 20% Chrom 1 5,5% Molybdän 0,5% Niob 0,02% Bor aus Ni/B Rest Nickel wurde zur Herstellung eines Verbundkörpers auf ein rostfreies Stahlblech (16.00/0 Chrom, 0,25% C) von 20 mm Dicke aufgelegt und bei der für die hochkarbidhaltige Hartlegierung notwendigen Sintertemperatur von 1410"C im Vakuum von 1,33 P.i gesintert. Durch Diffusion vom Sinterkörper in den Stahl entstand ein unbrauchbarer Schmelzkörper. Example 1 A 10 mm thick pressed body made of 60% titanium carbide and a Austenitic binder with 20% chromium 1 5.5% molybdenum 0.5% niobium 0.02% boron from Ni / B The remainder of the nickel was used to produce a composite body on a stainless steel sheet (16.00 / 0 chrome, 0.25% C) with a thickness of 20 mm and for the high-carbide Hard alloy necessary sintering temperature of 1410 "C sintered in a vacuum of 1.33 P.i. Diffusion from the sintered body into the steel resulted in an unusable melting body.
Beispiel 2 Der in Beispiel 1 genannten Hartstofflegierung wurden nun 3,0% Aluminium aus Ni/AI und 3,5% Kupfer zugegeben. Dadurch konnte die Sintertemperatur auf 1270aC gesenkt werden, ohne die Eigenschaften zu verschlechtern. Eine Verbundsinterung Preßkörper/ Stahl mit 16,0% Chrom und 0,25% Kohlenstoff ließ sich problemlos durchführen. Die Härte des Hartstoffteiles lag bei 70 HRC, die des Stahles bei 30 HRC, Die Stahlseite konnte ohne Probleme spanend auf Maß bearbeitet werden, die Hartstoffseite wurde nur plangeschliffen. Example 2 The hard material alloy mentioned in Example 1 were now 3.0% aluminum from Ni / Al and 3.5% copper were added. This allowed the sintering temperature can be lowered to 1270aC without deteriorating the properties. A composite sintering Pressings / steel with 16.0% chromium and 0.25% carbon could be carried out without any problems. The hardness of the hard material part was 70 HRC, that of the steel 30 HRC, the steel side could be machined to size without problems, the hard material side was just ground flat.
Nach den Beispielen 1 bis 2 können nun alle austenitischen Hartstofflegierungen auf Eisen-, Nickel-und/oder Kobaltbasis auf kompakten Stählen plattiert werden. Dazu ist notwendig, den hartstoffhaltigen Ansätzen je nach Hartstoffgehalt 2 bis 4% Aluminium aus einer entsprechenden Vorlegierung und/oder 2 bis 4% Kupfer zuzugeben. According to Examples 1 to 2, all austenitic hard material alloys can now be used iron, nickel and / or cobalt-based clad on compact steels. For this purpose, the hard material-containing approaches, depending on the hard material content 2 to Add 4% aluminum from a corresponding master alloy and / or 2 to 4% copper.
Anwendungsbeispiele sind Schläger und Hämnier in Schlagmühlen, Schlagmühlenleisten, Rotor- und Statormesser, Preßformen für Keramiken, Strangpreßwerkzeuge für alle Industriezweige, Mahltöpfe, Brecherbakken, Ventilsitze und Kegel, Werkzeuge und Verschleißteile für Warmarbeit, z. B. beim Glasschmelzen u. ä. Application examples are beater and hammer in beater mills, beater mill strips, Rotor and stator knives, molds for ceramics, extrusion tools for everyone Industries, grinding pots, crusher jaws, valve seats and cones, tools and Wear parts for hot work, e.g. B. when melting glass and the like.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803025533 DE3025533C1 (en) | 1980-07-05 | 1980-07-05 | Compound sintering process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803025533 DE3025533C1 (en) | 1980-07-05 | 1980-07-05 | Compound sintering process |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3025533C1 true DE3025533C1 (en) | 1982-02-11 |
Family
ID=6106495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803025533 Expired DE3025533C1 (en) | 1980-07-05 | 1980-07-05 | Compound sintering process |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3025533C1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0169292A1 (en) * | 1983-05-13 | 1986-01-29 | Santrade Ltd. | Compound body and method of making the same |
DE3633614A1 (en) * | 1986-10-02 | 1988-04-14 | Seilstorfer Gmbh & Co Metallur | Composite bar and method for its production |
DE4431563A1 (en) * | 1994-09-05 | 1996-03-07 | Kloeckner Humboldt Deutz Ag | Wear-resistant surface armor for the rollers of high-pressure roller presses for pressure reduction of granular goods (documents for P 44 44 337.4 given) |
WO1999015294A1 (en) * | 1997-09-19 | 1999-04-01 | Isis Innovation Limited | Method of liquid phase bonding |
-
1980
- 1980-07-05 DE DE19803025533 patent/DE3025533C1/en not_active Expired
Non-Patent Citations (3)
Title |
---|
Archiv für das Eisenhüttenwesen, 1952, S. 40, 141, 142 * |
Kieffer - Hotop: Sintereisen und Sinterstahl, 1948, S. 176-180 * |
Normblatt DIN 8513, S. 2 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0169292A1 (en) * | 1983-05-13 | 1986-01-29 | Santrade Ltd. | Compound body and method of making the same |
DE3633614A1 (en) * | 1986-10-02 | 1988-04-14 | Seilstorfer Gmbh & Co Metallur | Composite bar and method for its production |
DE4431563A1 (en) * | 1994-09-05 | 1996-03-07 | Kloeckner Humboldt Deutz Ag | Wear-resistant surface armor for the rollers of high-pressure roller presses for pressure reduction of granular goods (documents for P 44 44 337.4 given) |
WO1999015294A1 (en) * | 1997-09-19 | 1999-04-01 | Isis Innovation Limited | Method of liquid phase bonding |
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Legal Events
Date | Code | Title | Description |
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8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8339 | Ceased/non-payment of the annual fee |