EP2440349B1 - Method for processing steel powder - Google Patents

Method for processing steel powder Download PDF

Info

Publication number
EP2440349B1
EP2440349B1 EP10722682.1A EP10722682A EP2440349B1 EP 2440349 B1 EP2440349 B1 EP 2440349B1 EP 10722682 A EP10722682 A EP 10722682A EP 2440349 B1 EP2440349 B1 EP 2440349B1
Authority
EP
European Patent Office
Prior art keywords
steel powder
powder particles
small steel
balls
deformed
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
Application number
EP10722682.1A
Other languages
German (de)
French (fr)
Other versions
EP2440349A1 (en
Inventor
Arno Friedrichs
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2440349A1 publication Critical patent/EP2440349A1/en
Application granted granted Critical
Publication of EP2440349B1 publication Critical patent/EP2440349B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force

Definitions

  • the metal powder is fed to a jet mill and heated there in a chamber.
  • the heated metal powder particles are subjected to a collision to provide smooth and reduced metal powder particles. These are fed to an output and collected.
  • JP H03 130301 A describes a method for improving the surface quality of metal powder particles, in which the metal powder particles collide with each other, without plastic deformation of the metal powder particles occur.
  • articles PC KING, SH ZAHIRI, M. JAHEDI "Focused ion beam micro-dissection of cold-sprayed particles", ACTA MATER, Vol. 56, 4 September 2008, pages 5617-5626 , and KIM K ET AL: "Thermal Softening Effect on the Deposition Efficiency and Microstructure of Hot Sprayed Metallic Powder", SCRIPTA MATERIALIA, ELSEVIER, AMSTERDAM, NL, Vol. 60, No.
  • the object of the invention is to provide a method for processing steel powder consisting of a plurality of steel powder pellets, by means of which steel powder with non-spherical steel powder particles can be produced.
  • the process of the invention is provided as a starting material steel powder, which consists of a plurality of steel powder pellets whose diameter is in the range of 100 microns to 500 microns.
  • steel powder can be produced, for example, by the above-mentioned method.
  • a first step S1 heating of the steel powder pellets to a temperature at which the steel powder pellets are in the doughy state.
  • This heating of the steel powder pellets can be carried out using an induction process, by application of radiant heat or in a hot inert gas stream.
  • a collision of the steel powder pellets in the doughy state is brought about with a baffle body in order to obtain deformed steel powder particles.
  • This baffle may be a baffle that is at right angles or at another angle to the Steel powder bead stream runs.
  • This baffle plate may be formed propeller-shaped. Furthermore, can they are designed to be movable, for example, rotate or swiveled constantly.
  • the steel powder particles deformed by collision with the baffle plate are collected in a collecting vessel according to a subsequent step S3.
  • An advantageous embodiment is to transport the deformed steel powder particles by means of a conveyor belt in the collecting vessel, wherein the conveyor belt is disposed either between the baffle plate and the collecting vessel or wherein the conveyor belt itself serves as a baffle plate.
  • An alternative embodiment is to collide the steel powder pellets in the doughy state against each other to obtain deformed steel powder particles having a non-spherical surface.
  • step S4 After collecting the deformed steel powder particles in the collecting vessel, cooling of the deformed steel powder particles takes place in a step S4 until they are again in a solid state.
  • the steel powder particles provided by step S2 in the collecting vessel in which they are collected in accordance with step S3 may be subjected to another processing.
  • the resulting steel powder particles have, in contrast to the starting material on projections, edges and corners.
  • steel powder which consists of a plurality of such deformed steel powder particles, for producing a drilling tool made of steel is used with internal, helically extending cooling channels, wherein the steel powder is kneaded with a binder, the steel powder kneaded with the binder is passed through a press tool to produce a strand having internal, rectilinear cooling passages, which the
  • Pressing strand leaving each strand is cut to a desired length, the resulting blank is supported under support over its entire length of a rolling motion whose velocity varies linearly and steadily over the length of the body, so that the blank is twisted, and wherein the twisted
  • the blank is sintered and then provided on its outer shell with spiral flutes.
  • a first step S1 heating the steel powder pellets to a temperature at which the steel powder pellets are in the doughy state.
  • a subsequent step S1 / 2 the steel powder pellets in the doughy state are subjected to an acceleration.
  • This acceleration can be carried out by a magnetic field, by means of a spinning process or by means of a protective gas flow.
  • the accelerated, in doughy state steel powder pellets are subjected to a collision with a baffle in a subsequent step S2, as well as in the case of FIG. 1 explained method to be deformed.
  • the steel powder particles deformed by the collision are collected in a collecting vessel according to a subsequent step S3, where they cool according to a step S4 so that the steel powder particles finally are in a solid state.
  • steel powder consisting of a plurality of steel powder pellets is processed, so that steel powder is provided, which consists of a plurality of steel powder particles, which is not spherical are but have projections, corners and edges.
  • steel powder pellets located in the doughy state are accelerated before their collision process, steel powder pellets may shatter during the collision, so that a plurality of even smaller, deformed steel powder particles are formed from a steel powder pellet. This leads to a further improvement of the above-described and desired entanglement of the steel powder particles in the blank and thus to an even further dimensional stability of the blank.

Description

Es ist bereits ein Verfahren zur Herstellung von Stahlpulver bekannt, das aus einer Vielzahl von Stahlpulverkügelchen besteht. Bei diesem bekannten Verfahren wird eine Stahlschmelze erzeugt. Diese wird in einen Behälter überführt und dort mit N2-Gas beaufschlagt, um eine Atomisierung von erschmolzenem Stahl unter Verwendung von Stickstoffgas durchzuführen. Mittels dieses bekannten Verfahrens, welches in einer Schutzgasatmosphäre durchgeführt wird, wird Stahlpulver hergestellt, das aus einer Vielzahl von Stahlpulverkügelchen besteht, deren Durchmesser im Bereich zwischen 100 µm und 500 µm liegen.There is already known a method of producing steel powder consisting of a plurality of steel powder pellets. In this known method, a molten steel is produced. This is transferred to a vessel and charged there with N 2 gas to atomize molten steel using nitrogen gas. By means of this known method, which is carried out in a protective gas atmosphere, steel powder is produced, which consists of a plurality of steel powder pellets whose diameter is in the range between 100 .mu.m and 500 .mu.m.

Aus der JP 2004-43883 ist bereits ein Verfahren zur Verarbeitung von Metallpulver bekannt. Dabei wird das Metallpulver einer Strahlmühle zugeführt und dort in einer Kammer erwärmt. Die erwärmten Metallpulverpartikel werden einer Kollision unterworfen, um glatte und verkleinerte Metallpulverpartikel bereitzustellen. Diese werden einem Ausgang zugeführt und gesammelt.From the JP 2004-43883 A method for processing metal powder is already known. The metal powder is fed to a jet mill and heated there in a chamber. The heated metal powder particles are subjected to a collision to provide smooth and reduced metal powder particles. These are fed to an output and collected.

In der JP H03 130301 A ist ein Verfahren zur Verbesserung der Oberflächenqualität von Metallpulverpartikeln beschrieben, bei welchem die Metallpulverpartikel miteinander kollidieren, ohne dass plastische Deformationen der Metallpulverpartikel auftreten. In den Artikeln P.C. KING, S.H. ZAHIRI, M. JAHEDI: "Focused ion beam micro-dissection of cold-sprayed particles", ACTA MATER, Bd. 56, 4. September 2008, Seiten 5617-5626 , und KIM K ET AL: "Thermal softening effect on the deposition efficiency and microstructure of warm sprayed metallic powder", SCRIPTA MATERIALIA, ELSEVIER, AMSTERDAM, NL, Bd. 60, Nr. 8, 1. APRIL 2009, Seiten 710-713, XP025953666, ISSN: 1359-6462, DOI: 10.1016/J.SCRIPTAMAT.2008.12.050 sind Beschichtungsvorgänge beschrieben, bei welchen ein zu beschichtender Gegenstand mit erwärmten Partikeln besprüht wird, welche am zu besprühenden Gegenstand haften bleiben.In the JP H03 130301 A describes a method for improving the surface quality of metal powder particles, in which the metal powder particles collide with each other, without plastic deformation of the metal powder particles occur. In the articles PC KING, SH ZAHIRI, M. JAHEDI: "Focused ion beam micro-dissection of cold-sprayed particles", ACTA MATER, Vol. 56, 4 September 2008, pages 5617-5626 , and KIM K ET AL: "Thermal Softening Effect on the Deposition Efficiency and Microstructure of Hot Sprayed Metallic Powder", SCRIPTA MATERIALIA, ELSEVIER, AMSTERDAM, NL, Vol. 60, No. 8, APRIL 1, 2009, pages 710-713, XP025953666 , ISSN: 1359-6462, DOI: 10.1016 / J.SCRIPTAMAT.2008.12.050 coating processes are described in which an object to be coated is sprayed with heated particles which adhere to the object to be sprayed.

In der US 2008/118391 A1 ist ein Verfahren zur Verarbeitung von Metallpulverpartikeln beschrieben, bei welchem die Metallpulverpartikel erhitzt werden, - die erhitzten Metallpulverpartikel mit einem Prallkörper zur Kollision gebracht werden, um deformierte Metallpulverpartikel zu bilden, und die deformierten Metallpulverpartikel in einem Sammelgefäß gesammelt werden. Bei diesem Prallkörper handelt es sich um einen gekühlten Prallkörper, so dass die auf dem Prallkörper auftreffenden Metallpulverpartikel mittels des Prallkörpers sowohl deformiert als auch gekühlt werden. Die deformierten und bereits gekühlten Metallpulverpartikel werden im genannten Sammelgefäß gesammelt. Bei den zur Verfügung gestellten Metallpulverpartikeln handelt es sich insbesondere um Tantalpulverpartikel, die zur Herstellung von Tantalkondensatoren verwendet werden können.In the US 2008/118391 A1 there is described a method of processing metal powder particles in which the metal powder particles are heated, - the heated metal powder particles are collided with a baffle to form deformed metal powder particles, and the deformed metal powder particles are collected in a collection vessel. This impact body is a cooled impact body, so that the metal powder particles impinging on the impact body are both deformed and cooled by means of the impact body. The deformed and already cooled metal powder particles are collected in said collection vessel. The metal powder particles provided are in particular tantalum powder particles which can be used to produce tantalum capacitors.

Es hat sich gezeigt, dass es für bestimmte industrielle Anwendungen vorteilhaft oder gar notwendig ist, Stahlpulver mit nicht kugelförmigen Stahlpulverpartikeln zur verfügung zu stellen.It has been shown that it is advantageous or even necessary for certain industrial applications to provide steel powders with non-spherical steel powder particles.

Die Aufgabe der Erfindung besteht darin, ein Verfahren zur Bearbeitung von Stahlpulver, das aus einer Vielzahl von Stahlpulverkügelchen besteht, anzugeben, mittels welchem Stahlpulver mit nicht kugelförmigen Stahlpulverpartikeln hergestellt werden kann.The object of the invention is to provide a method for processing steel powder consisting of a plurality of steel powder pellets, by means of which steel powder with non-spherical steel powder particles can be produced.

Diese Aufgabe wird durch ein Verfahren mit den im Anspruch 1 angegebenen Merkmalen gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus deren nachfolgender Erläuterung anhand der Figuren. Es zeigt

Figur 1
ein Flussdiagramm zur Erläuterung eines Verfahrens zur Verarbeitung von Stahlpulver gemäß einem ersten Ausführungsbeispiel für die Erfindung und
Figur 2
ein Flussdiagramm zur Erläuterung eines Verfahrens zur Verarbeitung von Stahlpulver gemäß einem zweiten Ausführungsbeispiel für die Erfindung.
This object is achieved by a method having the features specified in claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following explanation with reference to FIGS. It shows
FIG. 1
a flowchart for explaining a method for processing steel powder according to a first embodiment of the invention and
FIG. 2
a flowchart for explaining a method for processing steel powder according to a second embodiment of the invention.

Dem erfindungsgemäßen Verfahren wird als Ausgangsmaterial Stahlpulver bereitgestellt, das aus einer Vielzahl von Stahlpulverkügelchen besteht, deren Durchmesser im Bereich von 100 µm bis 500 µm liegen. Derartiges Stahlpulver kann beispielsweise mittels des oben genannten Verfahrens hergestellt werden.The process of the invention is provided as a starting material steel powder, which consists of a plurality of steel powder pellets whose diameter is in the range of 100 microns to 500 microns. Such steel powder can be produced, for example, by the above-mentioned method.

Gemäß dem erfindungsgemäßen Verfahren erfolgt - wie es aus der Figur 1 ersichtlich ist - in einem ersten Schritt S1 ein Erwärmen der Stahlpulverkügelchen auf eine Temperatur, bei welcher sich die Stahlpulverkügelchen im teigigen Zustand befinden. Diese Erwärmung der Stahlpulverkügelchen kann unter Verwendung eines Induktionsvorganges, durch eine Anwendung von Strahlungswärme oder in einem heißen Schutzgasstrom vorgenommen werden.According to the method of the invention takes place - as it is known from FIG. 1 it can be seen - in a first step S1, heating of the steel powder pellets to a temperature at which the steel powder pellets are in the doughy state. This heating of the steel powder pellets can be carried out using an induction process, by application of radiant heat or in a hot inert gas stream.

In einem darauffolgenden zweiten Schritt S2 wird eine Kollision der sich im teigigen Zustand befindlichen Stahlpulverkügelchen mit einem Prallkörper herbeigeführt, um deformierte Stahlpulverpartikel zu erhalten. Bei diesem Prallkörper kann es sich um eine Prallplatte handeln, die im rechten Winkel oder in einem anderen Winkel zum Stahlpulverkügelchenstrom verläuft. Diese Prallplatte kann propellerförmig ausgebildet sein. Des Weiteren kann sie beweglich ausgebildet sein, beispielsweise rotieren oder ständig geschwenkt werden.In a subsequent second step S2, a collision of the steel powder pellets in the doughy state is brought about with a baffle body in order to obtain deformed steel powder particles. This baffle may be a baffle that is at right angles or at another angle to the Steel powder bead stream runs. This baffle plate may be formed propeller-shaped. Furthermore, can they are designed to be movable, for example, rotate or swiveled constantly.

Die durch Kollision mit der Prallplatte deformierten Stahlpulverpartikel werden gemäß einem nachfolgenden Schritt S3 in einem Sammelgefäß gesammelt. Eine vorteilhafte Ausgestaltung besteht darin, die deformierten Stahlpulverpartikel mittels eines Förderbandes in das Sammelgefäß zu transportieren, wobei das Förderband entweder zwischen der Prallplatte und dem Sammelgefäß angeordnet ist oder wobei das Förderband selbst als Prallplatte dient.The steel powder particles deformed by collision with the baffle plate are collected in a collecting vessel according to a subsequent step S3. An advantageous embodiment is to transport the deformed steel powder particles by means of a conveyor belt in the collecting vessel, wherein the conveyor belt is disposed either between the baffle plate and the collecting vessel or wherein the conveyor belt itself serves as a baffle plate.

Eine alternative Ausgestaltung besteht darin, die sich im teigigen Zustand befindlichen Stahlpulverkügelchen gegeneinander zu kollidieren, um deformierte Stahlpulverpartikel mit nicht kugelförmiger Oberfläche zu erhalten.An alternative embodiment is to collide the steel powder pellets in the doughy state against each other to obtain deformed steel powder particles having a non-spherical surface.

Nach dem Sammeln der deformierten Stahlpulverpartikel im Sammelgefäß erfolgt in einem Schritt S4 ein Erkalten der deformierten Stahlpulverpartikel solange, bis sie sich wieder in einem festen Zustand befinden. Alternativ dazu können die vom Schritt S2 bereitgestellten Stahlpulverpartikel in dem Sammelgefäß, in welchem sie gemäß dem Schritt S3 gesammelt werden, auch einer anderen Verarbeitung unterworfen werden.After collecting the deformed steel powder particles in the collecting vessel, cooling of the deformed steel powder particles takes place in a step S4 until they are again in a solid state. Alternatively, the steel powder particles provided by step S2 in the collecting vessel in which they are collected in accordance with step S3 may be subjected to another processing.

Die erhaltenen Stahlpulverpartikel weisen im Unterschied zum Ausgangsmaterial Vorsprünge, Kanten und Ecken auf. Dies ist beispielsweise dann von Vorteil, wenn Stahlpulver, das aus einer Vielzahl derartiger deformierter Stahlpulverpartikel besteht, zur Herstellung eines Bohrwerkzeuges aus Stahl mit innenliegenden, wendelförmig verlaufenden Kühlkanälen verwendet wird, wobei das Stahlpulver mit einem Bindemittel verknetet wird, das mit dem Bindemittel verknetete Stahlpulver durch ein Presswerkzeug geführt wird, um einen Strang mit innenliegenden, geradlinigen Kühlkanälen herzustellen, der dasThe resulting steel powder particles have, in contrast to the starting material on projections, edges and corners. This is for example advantageous if steel powder, which consists of a plurality of such deformed steel powder particles, for producing a drilling tool made of steel is used with internal, helically extending cooling channels, wherein the steel powder is kneaded with a binder, the steel powder kneaded with the binder is passed through a press tool to produce a strand having internal, rectilinear cooling passages, which the

Presswerkzeug verlassende Strang jeweils auf eine gewünschte Länge abgelängt wird, der dabei entstehende Rohling unter Abstützung über seine gesamte Länge einer Wälzbewegung unterworfen wird, deren Geschwindigkeit sich über die Länge des Körpers linear und stetig ändert, so dass der Rohling verdrillt wird, und wobei der verdrillte Rohling gesintert und dann an seinem Außenmantel mit spiralförmig verlaufenden Spannuten versehen wird.Pressing strand leaving each strand is cut to a desired length, the resulting blank is supported under support over its entire length of a rolling motion whose velocity varies linearly and steadily over the length of the body, so that the blank is twisted, and wherein the twisted The blank is sintered and then provided on its outer shell with spiral flutes.

Versuche haben ergeben, dass eine Herstellung derartiger Bohrwerkzeuge aus Stahl mit innenliegenden wendelförmig verlaufenden Kühlkanälen unter Verwendung von Stahlpulver, wie es als Ausgangsmaterial für das erfindungsgemäße Verfahren verwendet wird, und unter Verwendung des im vorherigen Absatz beschriebenen Verfahrens nicht möglich ist, da der hergestellte verdrillte Rohling forminstabil ist. Wird hingegen das mittels des erfindungsgemäßen Verfahrens hergestellte Stahlpulver, welches deformierte Stahlpulverpartikel aufweist, mittels des im vorherigen Absatz beschriebenen Verfahrens zur Herstellung von Bohrwerkzeugen aus Stahl mit innenliegenden, wendelförmig verlaufenden Kühlkanälen verwendet, dann können die gewünschten Endprodukte hergestellt werden, da der gebildete verdrillte Rohling formstabil ist und mittels des Sintervorganges in gewünschter Weise weiterverarbeitet werden kann. Dies ist darauf zurückzuführen, dass sich im verdrillten Rohling die deformierten Stahlpulverpartikel ineinander bzw. aneinander verhaken können, so dass die Form des Rohlings beibehalten wird.Tests have shown that it is not possible to produce such steel drilling tools with internal helical cooling channels using steel powder as used as starting material for the method according to the invention and using the method described in the previous paragraph, because the twisted blank produced is form unstable. If, on the other hand, the steel powder produced by means of the method according to the invention, which has deformed steel powder particles, by means of the method described in the previous paragraph for the production of steel drilling tools with internal, helically extending cooling channels used, then the desired end products can be produced because the formed twisted blank dimensionally stable is and can be further processed by means of the sintering process in the desired manner. This is due to the fact that in the twisted blank the deformed steel powder particles can interlock with each other or each other, so that the shape of the blank is maintained.

Ein verbessertes Verfahren zur Verarbeitung von Stahlpulver wird nachfolgend anhand des in der Figur 2 gezeigten Flussdiagrammes erläutert.An improved method for processing steel powder is described below with reference to in the FIG. 2 illustrated flowchart explained.

Auch bei diesem verbesserten Verfahren, bei welchem als Ausgangsmaterial dasselbe Stahlpulver verwendet wird wie bei dem anhand der Figur 1 erläuterten Verfahren, erfolgt in einem ersten Schritt S1 ein Erwärmen der Stahlpulverkügelchen auf eine Temperatur, bei welcher sich die Stahlpulverkügelchen im teigigen Zustand befinden.Also in this improved process, in which the same steel powder is used as the starting material as in the case of the FIG. 1 explained method, is carried out in a first step S1, heating the steel powder pellets to a temperature at which the steel powder pellets are in the doughy state.

In einem darauffolgenden Schritt S1/2 werden die sich im teigigen Zustand befindlichen Stahlpulverkügelchen einer Beschleunigung unterworfen. Diese Beschleunigung kann durch ein Magnetfeld, mittels eines Schleudervorganges oder mittels eines Schutzgasstromes vorgenommen werden.In a subsequent step S1 / 2, the steel powder pellets in the doughy state are subjected to an acceleration. This acceleration can be carried out by a magnetic field, by means of a spinning process or by means of a protective gas flow.

Die beschleunigten, sich im teigigen Zustand befindlichen Stahlpulverkügelchen werden in einem nachfolgenden Schritt S2 einer Kollision mit einem Prallkörper unterzogen, um ebenso wie bei dem anhand der Figur 1 erläuterten Verfahren deformiert zu werden.The accelerated, in doughy state steel powder pellets are subjected to a collision with a baffle in a subsequent step S2, as well as in the case of FIG. 1 explained method to be deformed.

Die durch die Kollision deformierten Stahlpulverpartikel werden gemäß einem nachfolgenden Schritt S3 in einem Sammelgefäß gesammelt, wo sie gemäß einem Schritt S4 erkalten, so dass die Stahlpulverpartikel schließlich in einem festen Zustand vorliegen.The steel powder particles deformed by the collision are collected in a collecting vessel according to a subsequent step S3, where they cool according to a step S4 so that the steel powder particles finally are in a solid state.

Durch das beschriebene Beschleunigen der sich im teigigen Zustand befindlichen Stahlpulverkügelchen wird deren kinetische Energie vergrößert, so dass die Stahlpulverkügelchen bei ihrem Aufprall auf den Prallkörper stärker deformiert werden als bei dem anhand der Figur 1 beschriebenen Ausführungsbeispiel.As a result of the described acceleration of the steel powder pellets located in the doughy state, their kinetic energy is increased so that the steel powder pellets are more strongly deformed when they impact the impact body than in the case of FIG FIG. 1 described embodiment.

Dies hat den Vorteil, dass die oben beschriebene Verhakung der Stahlpulverpartikel im Rohling verbessert wird, was wiederum in gewünschter Weise die Formstabilität des Rohlings erhöht.This has the advantage that the above-described entanglement of the steel powder particles in the blank is improved, which in turn increases the shape stability of the blank in the desired manner.

Gemäß der vorliegenden Erfindung wird nach alledem Stahlpulver, das aus einer Vielzahl von Stahlpulverkügelchen besteht, derart verarbeitet, dass Stahlpulver bereitgestellt wird, das aus einer Vielzahl von Stahlpulverpartikel besteht, die nicht kugelförmig ausgebildet sind, sondern Vorsprünge, Ecken und Kanten aufweisen. Insbesondere dann, wenn die sich im teigigen Zustand befindlichen Stahlpulverkügelchen vor deren Kollisionsvorgang beschleunigt werden, kann es dazu kommen, dass Stahlpulverkügelchen bei der Kollision zerspringen, so dass aus einem Stahlpulverkügelchen mehrere noch kleinere, deformierte Stahlpulverpartikel gebildet werden. Dies führt zu einer weiteren Verbesserung der oben beschriebenen und erwünschten Verhakung der Stahlpulverpartikel im Rohling und damit zu einer noch weiter verbesserten Formstabilität des Rohlings.According to the present invention, after all, steel powder consisting of a plurality of steel powder pellets is processed, so that steel powder is provided, which consists of a plurality of steel powder particles, which is not spherical are but have projections, corners and edges. In particular, when the steel powder pellets located in the doughy state are accelerated before their collision process, steel powder pellets may shatter during the collision, so that a plurality of even smaller, deformed steel powder particles are formed from a steel powder pellet. This leads to a further improvement of the above-described and desired entanglement of the steel powder particles in the blank and thus to an even further dimensional stability of the blank.

Claims (9)

  1. Method for processing steel powder consisting of a plurality of small steel powder balls, comprising the following steps:
    S1: heating the small steel powder balls until they are in a doughy state,
    S2: producing a collision of the small steel powder balls, which are in the doughy state, with an impact body for formation of deformed steel powder particles having projections, corners and edges,
    S3: collecting the deformed steel powder particles in a collecting vessel and
    S4: cooling the collected deformed steel powder particles until they are in a solid state.
  2. Method according to claim 1, characterised in that acceleration of the small steel powder balls in the doughy state takes place between the heating of the small steel powder balls and the production of a collision.
  3. Method according to one of the preceding claims, characterised in that the heating of the small steel powder balls is carried out with use of an induction process, by radiant heat or in a hot protective gas flow.
  4. Method according to claim 2 or 3, characterised in that the acceleration of the small steel powder balls is carried out by a magnetic field, by means of a centrifuging process or by means of a protective gas flow.
  5. Method according to any one of the preceding claims, characterised in that the small steel powder balls in the doughy state are brought into collision with an impact plate.
  6. Method according to claim 5, characterised in that the impact plate is formed to be propeller-shaped.
  7. Method according to claim 5 or 6, characterised in that the impact plate is constructed to be movable.
  8. Method according to claim 7, characterised in that the deformed steel powder particles are transported by means of the impact plate into the collecting vessel.
  9. Method according to any one of claims 1 to 4, characterised in that the small steel powder balls in the doughy state are brought into collision with one another in order to form deformed steel powder particles.
EP10722682.1A 2009-06-06 2010-05-28 Method for processing steel powder Active EP2440349B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009024120A DE102009024120A1 (en) 2009-06-06 2009-06-06 Process for processing metal powder
PCT/EP2010/057383 WO2010139614A1 (en) 2009-06-06 2010-05-28 Method for processing metal powder

Publications (2)

Publication Number Publication Date
EP2440349A1 EP2440349A1 (en) 2012-04-18
EP2440349B1 true EP2440349B1 (en) 2019-07-03

Family

ID=42670556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10722682.1A Active EP2440349B1 (en) 2009-06-06 2010-05-28 Method for processing steel powder

Country Status (6)

Country Link
US (1) US9132481B2 (en)
EP (1) EP2440349B1 (en)
JP (1) JP5787883B2 (en)
DE (1) DE102009024120A1 (en)
ES (1) ES2742260T3 (en)
WO (1) WO2010139614A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009024119A1 (en) * 2009-06-06 2010-12-09 Arno Friedrichs Process for processing metal powder
US9555473B2 (en) * 2011-10-08 2017-01-31 The Boeing Company System and method for increasing the bulk density of metal powder
JP6036597B2 (en) * 2013-08-02 2016-11-30 トヨタ自動車株式会社 Magnet powder manufacturing apparatus and manufacturing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03130301A (en) * 1989-07-28 1991-06-04 Ube Ind Ltd Manufacture of metal powder compacting material
US20080118391A1 (en) * 2006-10-30 2008-05-22 Niotan, Inc. Method and an Apparatus of Plasma Processing of Tantalum Particles

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2181123A (en) * 1937-02-11 1939-11-28 Glidden Co Treatment of metallic powders
JPS61166905A (en) 1985-01-16 1986-07-28 Sumitomo Special Metals Co Ltd Production of raw material powder for permanent magnet
JPH01321096A (en) 1988-06-24 1989-12-27 Senju Metal Ind Co Ltd Method of deforming spheroidal powder solder
DE69000179T2 (en) 1989-04-10 1993-01-07 Gte Prod Corp METHOD FOR PRODUCING FINE PARTICLE POWDERS BY SPRAYING WITH A HOT DISC.
US5039476A (en) * 1989-07-28 1991-08-13 Ube Industries, Ltd. Method for production of powder metallurgy alloy
BR0009107A (en) * 1999-03-19 2002-12-31 Cabot Corp Method for producing niobium powder and other metallic powders by grinding
JP2004043883A (en) 2002-07-11 2004-02-12 Murata Mfg Co Ltd Heat treatment method for metal powder
TWI381897B (en) 2004-12-22 2013-01-11 Taiyo Nippon Sanso Corp Process for producing metallic ultra fine powder
JP2006351688A (en) 2005-06-14 2006-12-28 Sumitomo Metal Mining Co Ltd Producing method of samarium-iron-nitrogen-based magnet fine powder
JP2007324270A (en) * 2006-05-31 2007-12-13 Toyota Motor Corp Method of manufacturing magnetic powder, and dust core
DE102009024119A1 (en) 2009-06-06 2010-12-09 Arno Friedrichs Process for processing metal powder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03130301A (en) * 1989-07-28 1991-06-04 Ube Ind Ltd Manufacture of metal powder compacting material
US20080118391A1 (en) * 2006-10-30 2008-05-22 Niotan, Inc. Method and an Apparatus of Plasma Processing of Tantalum Particles

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KIM K ET AL: "Thermal softening effect on the deposition efficiency and microstructure of warm sprayed metallic powder", SCRIPTA MATERIALIA, ELSEVIER, AMSTERDAM, NL, vol. 60, no. 8, 1 April 2009 (2009-04-01), pages 710 - 713, XP025953666, ISSN: 1359-6462, [retrieved on 20090113], DOI: 10.1016/J.SCRIPTAMAT.2008.12.050 *
P.C. KING, S.H. ZAHIRI, M. JAHEDI: "Focused ion beam micro-dissection of cold-sprayed particles", ACTA MATER, vol. 56, 4 September 2008 (2008-09-04), pages 5617 - 5626 *

Also Published As

Publication number Publication date
US9132481B2 (en) 2015-09-15
EP2440349A1 (en) 2012-04-18
JP2012529560A (en) 2012-11-22
WO2010139614A1 (en) 2010-12-09
JP5787883B2 (en) 2015-09-30
DE102009024120A1 (en) 2010-12-09
US20120060576A1 (en) 2012-03-15
ES2742260T3 (en) 2020-02-13

Similar Documents

Publication Publication Date Title
EP2794152B1 (en) Method for manufacturing a compact component, and component that can be produced by means of the method
EP2627923B1 (en) Bearing component, in particular bearing cage and method for its manufacture
DE4023962A1 (en) FINE GRAIN TITANIUM FORGED PIECES AND METHOD FOR THE PRODUCTION THEREOF
EP2890519A1 (en) Method for producing a composite component, and composite component
DE112009000504T5 (en) Tools with work surfaces of compacted powder metal and process
WO2012048676A2 (en) Generative production method and powder therefor
EP2440349B1 (en) Method for processing steel powder
EP3569311A1 (en) Matrix with metal printed parts for the extrusion of shaped bodies
EP3352235B1 (en) Method for producing a semi-finished product for a superconducting wire
DE10208868A1 (en) Vibration damping component and/or its coating is produced by plasma spraying or rapid solidification processing deposition of a metal alloy or intermetallic compound
WO2023118298A1 (en) Method and device for heating a vehicle wheel
EP3569334B1 (en) Method for producing a component
EP2440350A1 (en) Method for processing metal powder
DE102011111011A1 (en) Adjustable shovel element of a gas turbine of an aircraft engine, comprises adjusting device for changing shape of adjustable shovel element, which is constructed by a generative manufacturing process
DE102018126420A1 (en) CORN BINDER DIFFUSION TECHNOLOGY FOR RARE-EDGE MAGNETS
DE102019214667A1 (en) Component with an area to be cooled and means for the additive manufacture of the same
CN109746359A (en) A kind of hot-swage method of kirsite small specification tube or bar
EP2888064B1 (en) Forming method
DE102013020460A1 (en) Process for the production of TiAl components
DE102011113854A1 (en) Hard material powder and process for the production of hard material powder
RU2486275C1 (en) Method to produce ultra-fine grain blank of gte blade of titanium alloys
DE102010035590B4 (en) Method and device for manufacturing a structural component
DE102015107475B3 (en) A method of making a ring, rolling bearing and apparatus for making a ring
WO2024017425A1 (en) Rolling-bearing element and method for producing a rolling-bearing element
DE102019134153A1 (en) Sintered part and process for its manufacture

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20120109

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20150921

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20190211

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1150361

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190715

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502010016103

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KELLER AND PARTNER PATENTANWAELTE AG, CH

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20190703

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502010016103

Country of ref document: DE

Representative=s name: ZIMMERMANN & PARTNER PATENTANWAELTE MBB, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 502010016103

Country of ref document: DE

Owner name: ARNO FRIEDRICHS HARTMETALL GMBH & CO. KG, DE

Free format text: FORMER OWNER: FRIEDRICHS, ARNO, 95326 KULMBACH, DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: ARNO FRIEDRICHS HARTMETALL GMBH AND CO. KG, DE

Free format text: FORMER OWNER: FRIEDRICHS, ARNO, DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: ARNO FRIEDRICHS HARTMETALL GMBH & CO.KG

Effective date: 20191212

REG Reference to a national code

Ref country code: LU

Ref legal event code: PD

Owner name: ARNO FRIEDRICHS HARTMETALL GMBH & CO. KG; DE

Free format text: FORMER OWNER: FRIEDRICHS, ARNO

Effective date: 20191203

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20200102 AND 20200108

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191003

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191003

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191104

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2742260

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20200213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191004

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20191103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

REG Reference to a national code

Ref country code: AT

Ref legal event code: PC

Ref document number: 1150361

Country of ref document: AT

Kind code of ref document: T

Owner name: ARNO FRIEDRICHS HARTMETALL GMBH & CO. KG, DE

Effective date: 20200312

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200224

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502010016103

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG2D Information on lapse in contracting state deleted

Ref country code: IS

26N No opposition filed

Effective date: 20200603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: ARNO FRIEDRICHS HARTMETALL GMBH AND CO. KG, DE

Free format text: FORMER OWNER: ARNO FRIEDRICHS HARTMETALL GMBH AND CO. KG, DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190703

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20230530

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20230519

Year of fee payment: 14

Ref country code: IE

Payment date: 20230529

Year of fee payment: 14

Ref country code: FR

Payment date: 20230525

Year of fee payment: 14

Ref country code: ES

Payment date: 20230601

Year of fee payment: 14

Ref country code: DE

Payment date: 20230530

Year of fee payment: 14

Ref country code: CH

Payment date: 20230610

Year of fee payment: 14

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230703

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20230527

Year of fee payment: 14

Ref country code: AT

Payment date: 20230504

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230529

Year of fee payment: 14