EP2440349B1 - Verfahren zur verarbeitung von stahlpulver - Google Patents

Verfahren zur verarbeitung von stahlpulver Download PDF

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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
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EP
European Patent Office
Prior art keywords
steel powder
powder particles
small steel
balls
deformed
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EP10722682.1A
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German (de)
English (en)
French (fr)
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EP2440349A1 (de
Inventor
Arno Friedrichs
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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
    • 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.

Landscapes

  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
EP10722682.1A 2009-06-06 2010-05-28 Verfahren zur verarbeitung von stahlpulver Active EP2440349B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009024120A DE102009024120A1 (de) 2009-06-06 2009-06-06 Verfahren zur Verarbeitung von Metallpulver
PCT/EP2010/057383 WO2010139614A1 (de) 2009-06-06 2010-05-28 Verfahren zur verarbeitung von metallpulver

Publications (2)

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

Family

ID=42670556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10722682.1A Active EP2440349B1 (de) 2009-06-06 2010-05-28 Verfahren zur verarbeitung von stahlpulver

Country Status (6)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009024119A1 (de) * 2009-06-06 2010-12-09 Arno Friedrichs Verfahren zur Verarbeitung von Metallpulver
US9555473B2 (en) * 2011-10-08 2017-01-31 The Boeing Company System and method for increasing the bulk density of metal powder
JP6036597B2 (ja) * 2013-08-02 2016-11-30 トヨタ自動車株式会社 磁石用粉体の製造装置と製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03130301A (ja) * 1989-07-28 1991-06-04 Ube Ind Ltd 金属粉末成形材の製造方法
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 (ja) * 1985-01-16 1986-07-28 Sumitomo Special Metals Co Ltd 永久磁石用原料粉末の製造方法
JPH01321096A (ja) * 1988-06-24 1989-12-27 Senju Metal Ind Co Ltd 球形粉末はんだの変形方法
DE69000179T2 (de) * 1989-04-10 1993-01-07 Gte Prod Corp Verfahren zur herstellung von feinteilchen-pulvern durch zerstaeuben mit einer heissen scheibe.
US5039476A (en) * 1989-07-28 1991-08-13 Ube Industries, Ltd. Method for production of powder metallurgy alloy
IL145498A (en) 1999-03-19 2005-05-17 Cabot Corp Making niobium and other metal powders by milling
JP2004043883A (ja) * 2002-07-11 2004-02-12 Murata Mfg Co Ltd 金属粉末の熱処理方法
TWI381897B (zh) 2004-12-22 2013-01-11 Taiyo Nippon Sanso Corp 金屬超微粉之製造方法
JP2006351688A (ja) 2005-06-14 2006-12-28 Sumitomo Metal Mining Co Ltd サマリウム−鉄−窒素系磁石微粉末の製造方法
JP2007324270A (ja) * 2006-05-31 2007-12-13 Toyota Motor Corp 磁性粉末の製造方法および圧粉コアの製造方法
DE102009024119A1 (de) * 2009-06-06 2010-12-09 Arno Friedrichs Verfahren zur Verarbeitung von Metallpulver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03130301A (ja) * 1989-07-28 1991-06-04 Ube Ind Ltd 金属粉末成形材の製造方法
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
WO2010139614A1 (de) 2010-12-09
US9132481B2 (en) 2015-09-15
EP2440349A1 (de) 2012-04-18
JP2012529560A (ja) 2012-11-22
US20120060576A1 (en) 2012-03-15
DE102009024120A1 (de) 2010-12-09
JP5787883B2 (ja) 2015-09-30
ES2742260T3 (es) 2020-02-13

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