[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0719349B1 - Verfahren zur herstellung von sinterteilen - Google Patents

Verfahren zur herstellung von sinterteilen Download PDF

Info

Publication number
EP0719349B1
EP0719349B1 EP94926797A EP94926797A EP0719349B1 EP 0719349 B1 EP0719349 B1 EP 0719349B1 EP 94926797 A EP94926797 A EP 94926797A EP 94926797 A EP94926797 A EP 94926797A EP 0719349 B1 EP0719349 B1 EP 0719349B1
Authority
EP
European Patent Office
Prior art keywords
weight
content
sintering
sintered
molybdenum
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 - Lifetime
Application number
EP94926797A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0719349A1 (de
Inventor
Norbert Dautzenberg
Karl-Heinz Lindner
Klaus Vossen
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.)
QMP Metal Powders GmbH
Original Assignee
Mannesmann AG
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
Priority claimed from DE4331938A external-priority patent/DE4331938A1/de
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0719349A1 publication Critical patent/EP0719349A1/de
Application granted granted Critical
Publication of EP0719349B1 publication Critical patent/EP0719349B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
    • 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
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/123—Spraying molten metal
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/241—Chemical after-treatment on the surface
    • 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
    • B22F9/082—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 atomising using a fluid
    • B22F2009/0824—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 atomising using a fluid with a specific atomising fluid
    • B22F2009/0828—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 atomising using a fluid with a specific atomising fluid with water
    • 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
    • B22F2998/10—Processes characterised by the sequence of their steps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/95—Consolidated metal powder compositions of >95% theoretical density, e.g. wrought

Definitions

  • the invention relates to a method for producing sintered parts according to the preamble of claim 1.
  • the production of mechanical components from ferrous materials by means of sintering technology has the great advantage over production using metal-cutting shaping (e.g. turning, drilling, milling) that the actual shaping can be carried out in a single operation, practically without the generation of waste material, and therefore for series parts is possible faster and cheaper.
  • the parts are pressed, for example, on a hydraulic metal powder press in a molding tool using a pressing pressure of, for example, 7 t / cm 2 to give green bodies and then in an oven at about 1120-1150 ° C (normal sintering) or also at about 1250-1280 ° C ( High temperature sintering) to obtain sufficient static and dynamic strength.
  • sintered parts Due to the manufacturing process, sintered parts always have a lower density than that of the corresponding solid material (theoretical density) because they are penetrated by pores.
  • the actual density of the sintered parts is usually around 80-92% of the theoretical density, depending on the pressure applied and the shape of the part. This inevitably results in an impairment of the mechanical properties, which means that sintered parts have so far rarely been used with particularly high mechanical stress, especially since larger dimensions to compensate for this disadvantage cannot generally be accepted because of the associated increase in volume and weight.
  • the pores contained in the sintered part can act as internal notches, which can lead to a drastic reduction, in particular of the dynamic strength properties.
  • An iron-based powder is known from WO 91/19582, which is intended to ensure a comparatively high impact strength. It prescribes 0.3 - 0.7% by weight phosphorus and 0.3 - 3.5% by weight molybdenum as alloying elements. Any other alloying elements present are limited to a maximum of 2% by weight.
  • the 6 contents of molybdenum are preferably 0.5-2.5% by weight and of phosphorus 0.4-0.6% by weight (addition in particular in the form of Fe 3 P).
  • An upper limit of 0.07% by weight is recommended for carbon.
  • This iron-based powder is suitable for normal sintering temperatures (below 1450 ° C).
  • the test results shown in this document show that optimum proportions exist for both phosphorus and molydbdenum, in which the impact strength is particularly high.
  • the impact strength of a powder with 0.5% by weight phosphorus with a molybdenum content of 0-1.0% by weight rises steeply, reaches a maximum in the range 1-2% by weight and falls beyond 3.5% by weight. Molybdenum even down to below the initial values.
  • DE 29 43 601 C2 discloses a pre-alloyed steel powder Manufacture of high-strength sintered parts known, the 0.35 to 1.50% Mn, 0.2 up to 5.0% Cr, 0.1 to 7.0% Mo, 0.01 to 1.0 V, maximum 0.10% Si, maximum 0.01% Al, maximum 0.05% C, maximum 0.004% N, maximum 0.25% Oxygen, balance iron and other manufacturing-related impurities contains.
  • the low C content is required to be a good one
  • To enable the steel powder to be pressed by water atomization a corresponding melt and subsequent reduction annealing 1000 ° C is generated. Before pressing, it turns into green Steel powder in the usual way with lubricants (e.g.
  • the object of the invention is therefore a method of the generic type Specify with which Sintered parts can be produced with high density, with good Surface hardenability especially good dynamic Have strength properties and therefore without using the complex double sintering technology or a forging process for mechanically particularly strong components can be used, especially as gears for automotive transmissions and the like stressed components.
  • a steel powder produced for example, by gas atomization, gas-liquid atomization or preferably by water atomization of a steel melt containing molybdenum and subsequent reduction and soft annealing at 850-950 ° C., after mixing with conventional lubricants of powder metallurgy (e.g. Zinc stearate) can be processed into components which only have an extremely small pore volume, ie a density close to the theoretically highest possible density of the material (eg 95 to 98%). All that is required is a simple pressing using customary pressures in the range 6.0-8.0 t / cm 2 , preferably 6.5-7.5 t / cm 2 .
  • powder metallurgy e.g. Zinc stearate
  • Sintering temperatures can range from 1050 to 1350 ° C, with higher temperatures being preferred. This means around up to 1150 ° C when using belt furnaces and around 1250 - 1300 ° C with walking beam furnaces (high temperature sintering). High-temperature sintering can further increase the density that can be achieved compared to normal sintering.
  • the powder mixture according to the invention is characterized in that it is practically phosphorus-free, that is to say it contains phosphorus only as an impurity (P ⁇ 0.02% by weight).
  • the minimum required molybdenum content of the molten steel that is to be used for the powder production depends on the intended sintering temperature during the later production of the sintered parts. A content of 4.0% by weight is already sufficient in any case. In economic reasons, an upper limit of 5% by weight, preferably even only 4.5% by weight, should not be exceeded. At a sintering temperature of 1120 ° C 3.8% by weight of molybdenum and at 1280 ° C even 2.7 6% by weight are sufficient.
  • the molten steel must not only be practically phosphorus-free but must also have no significant carbon content (C ⁇ 0.01% by weight) so that the powder is sufficiently soft and easy to press remains.
  • the strength can be increased in individual cases, albeit this should even be avoided if possible, admixed with the 6-graphite powder which, however, has a maximum carbon content of 0.06% by weight may result in the powder mixture.
  • the powder can also contain the usual impurities contain a molten steel.
  • Carbon black molybdenum are other metallic Alloy additions are not required, but usually do not interfere, if they don't take on too large values. Overall, these should additional alloying elements a sum of 1.0% by weight, preferably not exceed 0.5% by weight.
  • To increase the strength of the Alloy can include the addition of chromium (preferably without further additional alloying elements) within the stated limits be appropriate.
  • a reducing atmosphere in particular in an atmosphere containing at least 10% by volume, preferably 20-40% by volume, of hydrogen.
  • forming gas ie a mixture of H 2 and N 2 .
  • Higher H 2 contents tend to improve the density that can be achieved during sintering, which, because of the setting of the powder mixture according to the invention, takes place exclusively in the alpha phase and therefore strongly promotes density sintering (without the formation of a liquid phase).
  • the cooling after sintering does not require any special measures.
  • the sintered parts have a purely ferritic structure made of FeMo mixed crystals.
  • the sintered parts can then be calibrated be subjected to deformation in the surface area (Leveling the roughness) and thus to a better one Surface quality and dimensional accuracy.
  • case hardening is carried out, which is particularly suitable for Gears and similarly stressed parts is recommended as they become one substantial increase in surface hardness and for the introduction of Residual compressive stresses.
  • gears it is advisable to use the Case hardening to subject the tooth area to soft scraping. After hardening the gears, the usual grinding of Drilling and plane surfaces are done.
  • the sintered parts produced in this way have a close to theoretical maximum density, being particularly remarkable is that the remaining pores are small, self-contained and round are and therefore have no significant notch effect. Hence arise excellent dynamic strength values as well as after a Case hardening at the same time also high surface hardness, which for the Wear resistance and e.g. the tooth flank capacity of are crucial.
  • Figures 1 and 2 show in different magnifications Cross section of sintered parts produced according to the invention.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Forging (AREA)
EP94926797A 1993-09-16 1994-09-09 Verfahren zur herstellung von sinterteilen Expired - Lifetime EP0719349B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4331938A DE4331938A1 (de) 1993-09-16 1993-09-16 Molybdänhaltiges Eisenbasispulver
DE4331938 1993-09-16
DE9409832U DE9409832U1 (de) 1993-09-16 1994-06-09 Metallpulvermischung
DE9409832U 1994-06-09
PCT/DE1994/001087 WO1995008006A1 (de) 1993-09-16 1994-09-09 Verfahren zur erzeugung einer pulvermischung und deren verwendung

Publications (2)

Publication Number Publication Date
EP0719349A1 EP0719349A1 (de) 1996-07-03
EP0719349B1 true EP0719349B1 (de) 1998-04-29

Family

ID=25929696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94926797A Expired - Lifetime EP0719349B1 (de) 1993-09-16 1994-09-09 Verfahren zur herstellung von sinterteilen

Country Status (7)

Country Link
US (1) US5628046A (ja)
EP (1) EP0719349B1 (ja)
JP (1) JP3572078B2 (ja)
AT (1) ATE165628T1 (ja)
CA (1) CA2165087C (ja)
ES (1) ES2115257T3 (ja)
WO (1) WO1995008006A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10306353A (ja) 1997-04-30 1998-11-17 Nippon Piston Ring Co Ltd シンクロナイザリング
SE9702299D0 (sv) * 1997-06-17 1997-06-17 Hoeganaes Ab Stainless steel powder
US6042949A (en) * 1998-01-21 2000-03-28 Materials Innovation, Inc. High strength steel powder, method for the production thereof and method for producing parts therefrom
SE9803171D0 (sv) * 1998-09-18 1998-09-18 Hoeganaes Ab Warm compaction of steel powders
US6514307B2 (en) * 2000-08-31 2003-02-04 Kawasaki Steel Corporation Iron-based sintered powder metal body, manufacturing method thereof and manufacturing method of iron-based sintered component with high strength and high density
JP2004324712A (ja) * 2003-04-23 2004-11-18 Mitsubishi Materials Corp モータ式燃料ポンプの耐摩耗性軸受

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901661A (en) * 1972-04-06 1975-08-26 Toyo Kohan Co Ltd Prealloyed steel powder for formation of structural parts by powder forging and powder forged article for structural parts
US4382818A (en) * 1975-12-08 1983-05-10 Ford Motor Company Method of making sintered powder alloy compacts
SE7612279L (sv) * 1976-11-05 1978-05-05 British Steel Corp Finfordelat glodgat stalpulver, samt sett att framstella detta.
JPS5810962B2 (ja) * 1978-10-30 1983-02-28 川崎製鉄株式会社 圧縮性、成形性および熱処理特性に優れる合金鋼粉
US4350529A (en) * 1979-02-09 1982-09-21 Scm Corporation Corrosion-resistant powder-metallurgy stainless steel powders and compacts therefrom
US4331478A (en) * 1979-02-09 1982-05-25 Scm Corporation Corrosion-resistant stainless steel powder and compacts made therefrom
SE451549B (sv) * 1983-05-09 1987-10-19 Kloster Speedsteel Ab Pulvermetallurgisk metod att framstella metallkroppar av magnetiserbart sferiskt pulver
SE453733B (sv) * 1985-03-07 1988-02-29 Hoeganaes Ab Jernbaserat pulver for hoghallfasta sintrade kroppar
US4880461A (en) * 1985-08-18 1989-11-14 Hitachi Metals, Ltd. Super hard high-speed tool steel
KR910002918B1 (ko) * 1987-03-13 1991-05-10 미쯔비시마테리알 가부시기가이샤 Fe계 소결합금제 변속기용 동기링
JPH0747794B2 (ja) * 1988-06-27 1995-05-24 川崎製鉄株式会社 耐食性に優れた焼結合金鋼およびその製造方法
CA2004625A1 (en) * 1988-12-06 1990-06-06 Patrick J. Mcgeehan Iron-based powder for the manufacture of sintered components
SE468466B (sv) * 1990-05-14 1993-01-25 Hoeganaes Ab Jaernbaserat pulver och noetningsresistent varmhaallfast komponent framstaelld av detta samt saett att framstaella komponenten
US5080712B1 (en) * 1990-05-16 1996-10-29 Hoeganaes Corp Optimized double press-double sinter powder metallurgy method
US5009842A (en) * 1990-06-08 1991-04-23 Board Of Control Of Michigan Technological University Method of making high strength articles from forged powder steel alloys
US5217683A (en) * 1991-05-03 1993-06-08 Hoeganaes Corporation Steel powder composition
US5238482A (en) * 1991-05-22 1993-08-24 Crucible Materials Corporation Prealloyed high-vanadium, cold work tool steel particles and methods for producing the same
DE69314438T2 (de) * 1992-11-30 1998-05-14 Sumitomo Electric Industries Niedrig legierter Sinterstahl und Verfahren zu dessen Herstellung
US5522914A (en) * 1993-09-27 1996-06-04 Crucible Materials Corporation Sulfur-containing powder-metallurgy tool steel article
US5552109A (en) * 1995-06-29 1996-09-03 Shivanath; Rohith Hi-density sintered alloy and spheroidization method for pre-alloyed powders

Also Published As

Publication number Publication date
ES2115257T3 (es) 1998-06-16
WO1995008006A1 (de) 1995-03-23
JP3572078B2 (ja) 2004-09-29
CA2165087A1 (en) 1995-03-23
JPH09502766A (ja) 1997-03-18
CA2165087C (en) 2004-07-06
US5628046A (en) 1997-05-06
ATE165628T1 (de) 1998-05-15
EP0719349A1 (de) 1996-07-03

Similar Documents

Publication Publication Date Title
DE69231339T2 (de) Verfahren zur herstellung von lagern
DE69314438T2 (de) Niedrig legierter Sinterstahl und Verfahren zu dessen Herstellung
DE2943601C2 (de) Vorlegierte Stahlpulver zur pulvermetallurgischen Herstellung von hochfesten Teilen
DE3782064T2 (de) Hochdichte gesinterte eisenlegierung.
DE2937724C2 (de) Pulvermetallurgisch hergestelltes Stahlerzeugnis mit hohem Vanadiumcarbid- Anteil
DE102012018964B4 (de) Auf Eisen-Basis gesinterter Gleitkörper und Verfahren zu seiner Herstellung
DE3853000T2 (de) Zusammengesetztes legierungsstahlpulver und gesinterter legierungsstahl.
DE69604902T2 (de) Rostfreier stahlpuder und ihre verwendung zur herstellung formkörper durch pulvermetallurgie
DE69818138T2 (de) Kaltarbeitswerkzeugstahlteilchen mit hoher Schlagfestigkeit aus Metallpulver und Verfahren zu seiner Herstellung
DE1298293B (de) Hochverschleissfeste, bearbeitbare und haertbare Sinterstahllegierung und Verfahren zu deren Herstellung
DE3744550C2 (ja)
EP3323902B1 (de) Pulvermetallurgisch hergestellter, hartstoffpartikel enthaltender stahlwerkstoff, verfahren zur herstellung eines bauteils aus einem solchen stahlwerkstoff und aus dem stahlwerkstoff hergestelltes bauteil
DE69503591T2 (de) Wärmebeständige, gesinterte Eisen-Legierung für einen Ventilsitz
DE2722972A1 (de) Stickstoff enthaltender pulvermetallurgie-werkzeugstahl
DE2705052A1 (de) Nach dem pulvermetallurgieverfahren hergestellter, stickstoff enthaltender schnelldrehstahl
DE69717541T2 (de) Niedriglegierte Stahlpulver zur Härtersinterung
EP0747154B1 (de) Verfahren und Vorrichtung zur Herstellung von Sinterteilen
DE69521516T2 (de) Eisen-basispulver mit chrom, molybden und mangan
WO2001079575A1 (de) Stickstofflegierter, sprühkompaktierter stahl, verfahren zu seiner herstellung und verbundwerkstoff hergestellt aus dem stahl
EP0719349B1 (de) Verfahren zur herstellung von sinterteilen
DE19708197B4 (de) Gesintertes Gleitelement und Verfahren zu dessen Herstellung
DE69530129T2 (de) Hochfeste gesinterte legierung und verfahren zu deren herstellung
DE69703589T2 (de) Metallpulvermischung auf eisenbasis und damit hergestellter komponente
WO2018095610A1 (de) Pulvermetallurgisch hergestellter stahlwerkstoff, verfahren zur herstellung eines bauteils aus einem solchen stahlwerkstoff und aus dem stahlwerkstoff hergestelltes bauteil
DE69419474T2 (de) Artikel aus Schwefel enthaltenden Werkzeugstahlpulver und Verfahren zu seiner Herstellung

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: 19951019

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE ES FR GB IT LI SE

17Q First examination report despatched

Effective date: 19970212

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR GB IT LI SE

REF Corresponds to:

Ref document number: 165628

Country of ref document: AT

Date of ref document: 19980515

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

ET Fr: translation filed
ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 59405861

Country of ref document: DE

Date of ref document: 19980604

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2115257

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980522

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

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

26N No opposition filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: QMP METAL POWDERS GMBH

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: MANNESMANN AKTIENGESELLSCHAFT TRANSFER- QMP METAL

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: FR

Payment date: 20050823

Year of fee payment: 12

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

Ref country code: GB

Payment date: 20050830

Year of fee payment: 12

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

Ref country code: DE

Payment date: 20050912

Year of fee payment: 12

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

Ref country code: SE

Payment date: 20050914

Year of fee payment: 12

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

Ref country code: CH

Payment date: 20050915

Year of fee payment: 12

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

Ref country code: AT

Payment date: 20050919

Year of fee payment: 12

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

Ref country code: ES

Payment date: 20050920

Year of fee payment: 12

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

Ref country code: AT

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

Effective date: 20060909

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

Ref country code: SE

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

Effective date: 20060910

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

Ref country code: LI

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

Effective date: 20060930

Ref country code: CH

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

Effective date: 20060930

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

Ref country code: IT

Payment date: 20060930

Year of fee payment: 13

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

Ref country code: DE

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

Effective date: 20070403

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060909

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070531

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

Ref country code: GB

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

Effective date: 20060909

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20060911

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

Ref country code: ES

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

Effective date: 20060911

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

Ref country code: FR

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

Effective date: 20061002

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

Ref country code: IT

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

Effective date: 20070909