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EP1779947A1 - Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques - Google Patents

Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques Download PDF

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Publication number
EP1779947A1
EP1779947A1 EP06025501A EP06025501A EP1779947A1 EP 1779947 A1 EP1779947 A1 EP 1779947A1 EP 06025501 A EP06025501 A EP 06025501A EP 06025501 A EP06025501 A EP 06025501A EP 1779947 A1 EP1779947 A1 EP 1779947A1
Authority
EP
European Patent Office
Prior art keywords
deformation
flat
wide
thickness
produced
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.)
Ceased
Application number
EP06025501A
Other languages
German (de)
English (en)
Inventor
Siegfried Dipl.-Ing. Wilmes
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.)
Voestalpine Edelstahl GmbH
Original Assignee
Voestalpine Edelstahl GmbH
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 Voestalpine Edelstahl GmbH filed Critical Voestalpine Edelstahl GmbH
Publication of EP1779947A1 publication Critical patent/EP1779947A1/fr
Ceased legal-status Critical Current

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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
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 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
    • 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
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • 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
    • B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
    • 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
    • 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
    • B22F5/006—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of flat products, e.g. sheets
    • 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
    • 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

Definitions

  • the invention comprises a material produced by powder metallurgy with a rectangular or flat elliptical cross section, so-called wide-flat material having a width that is at least 3.1 times the thickness and has a degree of deformation of at least 2 times, in particular starting material for the production of Cutting and punching tools, wherein a gas-produced, preferably atomized with nitrogen powder of an alloy introduced into a capsule, compacted and this is optionally closed after evacuation, followed by heating and isostatic pressing (HIP-en) of the powder capsule and the like produced hot isostatically pressed blank is deformed by forging and / or rolling.
  • a gas-produced preferably atomized with nitrogen powder of an alloy introduced into a capsule, compacted and this is optionally closed after evacuation, followed by heating and isostatic pressing (HIP-en) of the powder capsule and the like produced hot isostatically pressed blank is deformed by forging and / or rolling.
  • HIP-en isostatic pressing
  • coarse primary carbides and a carbide network may be present in cast condition ledeburger steels conventionally produced by block casting.
  • these castings or blocks are subjected to hot working, the mechanical material properties are improved, but the extent of the improvement depends on the direction of stress. It is quite possible that by means of impact bending samples transverse to the direction of deformation only 25% to 30% of the impact bending working values are determined in comparison with those measured in the direction of deformation. This directional dependence of the toughness of the material can be explained by a pronounced carbide line structure, which can also be detected microscopically, in conventionally produced material.
  • Such a powder metallurgy produced material can be used undeformed or deformed to increase the mechanical properties.
  • Powder metallurgical, cutting and punching tools made of deformed wide-flat material, such as dies, punches and the like. With rectangular, flat cross-sectional shape showed in practical use sometimes only a short life; unexpectedly, damage occurred due to tool breakage.
  • microstructures with different etchings were found in comparison with the other areas of the material that support fiber theory.
  • a structure with coarse grains adapted to the deformation process was not detectable by metallography.
  • the object of the present invention to provide an article of the aforementioned type having advantageous properties for use is achieved by increasing the toughness of the material produced by forging and / or rolling from the PM blank, measured in any direction, in particular in the thickness direction of the cross section of the material is as that of the material in hot isostatically pressed, undeformed state.
  • a deformed material having such a rectangular or flat elliptical cross-sectional shape can be made by forming the difference between deformation in the width direction and deformation in the thickness direction of the cross section during forming of the wide-flat material is at most 2 times the lower deformation value.
  • Far wide flat material according to the invention can also be created if the hot isostatically pressed blank is subjected in the direction of the longitudinal extent of compression forming with a crushing degree of at least 2 times, followed by a stretch forming of the compressed blank.
  • the hot isostatic pressed blank is subjected to a diffusion annealing treatment with a highest temperature of 20 ° C below the solidus temperature of the alloy and a minimum annealing time of 4 hours, after which this is by Reckumformung forged and / or rolled a wide-flat material.
  • the advantage of the PM material according to the invention is, in particular, that the effectiveness of the regions adversely influencing the toughness properties in the material is reduced.
  • the emergence of these areas is not yet scientifically clarified, also why these zones in the material adversely affect the mechanical properties can not be interpreted with certainty, because in these areas or zones, which are etched darker in a Schliffprobung, a rather finer, globulitician Carbide structure is present.
  • the performance advantage of the material produced in this way is due to the fact that tools made therefrom are less notch sensitive and thereby endure significantly higher stresses and impact loads.
  • hot press dies were made and tested in practical use.
  • the sand time of the tool of conventional material was extremely low. It took place after 33 shock-like pressing a breaking off a projecting profile part, with no other wear or abrasion was noted.
  • the die of the same type prepared for the same product from the invention produced by similar material deformations in the width and thickness direction wide-flat material yielded over 3000 pressings, after which the tool was eliminated because of abrasive wear.
  • test values T-S and T-L as well as S-T and S-L lie throughout in the same scattering range, so that in FIG. 2 to FIG. 5 only one variable or one value is taken into account.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Forging (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP06025501A 2000-03-03 2001-02-23 Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques Ceased EP1779947A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0034900A AT409831B (de) 2000-03-03 2000-03-03 Verfahren zur pulvermetallurgischen herstellung von vormaterial und vormaterial
EP01890047A EP1129803B1 (fr) 2000-03-03 2001-02-23 Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP01890047A Division EP1129803B1 (fr) 2000-03-03 2001-02-23 Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques

Publications (1)

Publication Number Publication Date
EP1779947A1 true EP1779947A1 (fr) 2007-05-02

Family

ID=3672384

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06025501A Ceased EP1779947A1 (fr) 2000-03-03 2001-02-23 Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques
EP01890047A Expired - Lifetime EP1129803B1 (fr) 2000-03-03 2001-02-23 Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP01890047A Expired - Lifetime EP1129803B1 (fr) 2000-03-03 2001-02-23 Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques

Country Status (8)

Country Link
US (1) US6630102B2 (fr)
EP (2) EP1779947A1 (fr)
JP (2) JP2001316706A (fr)
AT (2) AT409831B (fr)
DE (1) DE50111660D1 (fr)
DK (1) DK1129803T3 (fr)
ES (1) ES2275645T3 (fr)
PT (1) PT1129803E (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10340133B3 (de) * 2003-08-28 2005-02-03 Eads Deutschland Gmbh Verfahren zum Reduzieren von Oberflächenoxiden auf metallischen Pulverpartikeln während des Sinterns daraus hergestellter Pulverkörper
US8778259B2 (en) 2011-05-25 2014-07-15 Gerhard B. Beckmann Self-renewing cutting surface, tool and method for making same using powder metallurgy and densification techniques
EP2662166A1 (fr) 2012-05-08 2013-11-13 Böhler Edelstahl GmbH & Co KG Matière première avec grande résistance à l'usure
RU2504455C1 (ru) * 2012-11-01 2014-01-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Уфимский государственный авиационный технический университет" Способ получения заготовок из порошковых металлических материалов

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3726447A1 (de) * 1986-08-12 1988-02-18 Bbc Brown Boveri & Cie Verfahren zur pulvermetallurgischen herstellung eines werkstuecks auf der basis einer aluminiumlegierung mit hoher festigkeit im bereich zwischen raumtemperatur und 300(grad)c
DD279428A1 (de) * 1989-01-16 1990-06-06 Freiberg Bergakademie Verfahren zur pulvermetallurgischen herstellung von halbzeug aus schnellarbeitsstahl
DE3530741C1 (de) * 1985-08-28 1993-01-14 Avesta Nyby Powder AB, Torshälla Verfahren zur Herstellung pulvermetallurgischer Gegenstaende

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE279428C (fr)
US4121927A (en) * 1974-03-25 1978-10-24 Amsted Industries Incorporated Method of producing high carbon hard alloys
US3966422A (en) * 1974-05-17 1976-06-29 Cabot Corporation Powder metallurgically produced alloy sheet
US4479833A (en) * 1981-06-26 1984-10-30 Bbc Brown, Boveri & Company, Limited Process for manufacturing a semi-finished product or a finished component from a metallic material by hot working
SE451549B (sv) * 1983-05-09 1987-10-19 Kloster Speedsteel Ab Pulvermetallurgisk metod att framstella metallkroppar av magnetiserbart sferiskt pulver
US5201966A (en) * 1989-08-31 1993-04-13 Hitachi Powdered Metals, Co., Ltd. Method for making cylindrical, iron-based sintered slugs of specified porosity for subsequent plastic deformation processing
AT395230B (de) * 1989-11-16 1992-10-27 Boehler Gmbh Verfahren zur herstellung von vormaterial fuer werkstuecke mit hohem anteil an metallverbindungen
JPH0474804A (ja) * 1990-07-16 1992-03-10 Mitsubishi Heavy Ind Ltd 高温域硬化粉体材からの角材製造方法
JPH0533012A (ja) * 1991-07-24 1993-02-09 Sumitomo Metal Ind Ltd 面内異方性の小さい分散強化型鋼の加工法
JPH09194905A (ja) * 1996-01-16 1997-07-29 Mitsubishi Heavy Ind Ltd 切削工具等の製造方法
JPH09310108A (ja) * 1996-05-16 1997-12-02 Daido Steel Co Ltd ダイス用ブランクの製造方法及びダイス用ブランク
US5830287A (en) * 1997-04-09 1998-11-03 Crucible Materials Corporation Wear resistant, powder metallurgy cold work tool steel articles having high impact toughness and a method for producing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3530741C1 (de) * 1985-08-28 1993-01-14 Avesta Nyby Powder AB, Torshälla Verfahren zur Herstellung pulvermetallurgischer Gegenstaende
DE3726447A1 (de) * 1986-08-12 1988-02-18 Bbc Brown Boveri & Cie Verfahren zur pulvermetallurgischen herstellung eines werkstuecks auf der basis einer aluminiumlegierung mit hoher festigkeit im bereich zwischen raumtemperatur und 300(grad)c
DD279428A1 (de) * 1989-01-16 1990-06-06 Freiberg Bergakademie Verfahren zur pulvermetallurgischen herstellung von halbzeug aus schnellarbeitsstahl

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WILMES S: "PULVERMETALLURGISCHE WERKZEUGSTAHLE - HERSTELLUNG, EIGENSCHAFTEN UND ANWENDUNG", STAHL UND EISEN,DE,VERLAG STAHLEISEN GMBH. DUSSELDORF, vol. 110, no. 1, 15 January 1990 (1990-01-15), pages 93 - 103, XP000103109, ISSN: 0340-4803 *

Also Published As

Publication number Publication date
ATE348673T1 (de) 2007-01-15
EP1129803B1 (fr) 2006-12-20
DE50111660D1 (de) 2007-02-01
ES2275645T3 (es) 2007-06-16
PT1129803E (pt) 2007-03-30
EP1129803A3 (fr) 2001-10-04
US6630102B2 (en) 2003-10-07
ATA3492000A (de) 2002-04-15
JP2010047840A (ja) 2010-03-04
DK1129803T3 (da) 2007-04-30
EP1129803A2 (fr) 2001-09-05
AT409831B (de) 2002-11-25
JP2001316706A (ja) 2001-11-16
US20010022945A1 (en) 2001-09-20

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