EP1129803A2 - 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
EP1129803A2
EP1129803A2 EP01890047A EP01890047A EP1129803A2 EP 1129803 A2 EP1129803 A2 EP 1129803A2 EP 01890047 A EP01890047 A EP 01890047A EP 01890047 A EP01890047 A EP 01890047A EP 1129803 A2 EP1129803 A2 EP 1129803A2
Authority
EP
European Patent Office
Prior art keywords
flat
deformation
powder
isostatically pressed
subjected
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.)
Granted
Application number
EP01890047A
Other languages
German (de)
English (en)
Other versions
EP1129803B1 (fr
EP1129803A3 (fr
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
Priority to EP06025501A priority Critical patent/EP1779947A1/fr
Publication of EP1129803A2 publication Critical patent/EP1129803A2/fr
Publication of EP1129803A3 publication Critical patent/EP1129803A3/fr
Application granted granted Critical
Publication of EP1129803B1 publication Critical patent/EP1129803B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 relates to a method for the powder metallurgical production of improved isotropic material with rectangular or flat-elliptical cross-section, so-called wide-flat material, in particular Primary material for the production of cutting and punching tools, in which a powder of an alloy produced with gas, in particular atomized with nitrogen introduced into a capsule, compressed and, if necessary, after a Evacuation is closed, followed by heating and isostatic pressing (HIP-en) of the powder capsule and the hot isostatic produced in this way pressed blank subjected to deformation by forging and / or rolling becomes.
  • HIP-en isostatic pressing
  • the invention also includes a material produced by powder metallurgy rectangular or flat-elliptical cross-section, so-called wide-flat material with a width at least 3.1 times the thickness and one Has a degree of deformation of at least 2 times, in particular manufactured according to one of the aforementioned methods.
  • a material (PM material) produced in this way by powder metallurgy can be undeformed used or deformed to increase the mechanical properties.
  • microstructure areas were included different etching in comparison with the other areas of the material found that support fiber theory.
  • a structure with rough, that Grain adapted to the deformation process was not metallographically detectable.
  • the invention now aims to provide methods of the type mentioned at the beginning create, by means of which an improved isotropy of the mechanical Properties, in particular an increase in impact resistance and Bending fracture toughness in the direction of thickness of wide-flat material from deformed PM workpieces is reached.
  • Another object of the invention is to provide a Object according to the preamble of claim 4.
  • the aim is achieved in that a blank with such a rectangular or flat elliptical cross-sectional shape created and a reshaping is subjected to the difference between the deformation in Direction of width and deformation in the thickness direction of the cross section of the Wide-flat material at most 2 times, preferably at most 1.5 times the lower deformation value.
  • the above objective is also achieved when the isostatic is hot pressed blank in the direction of the longitudinal extent of a upsetting is subjected to at least a double degree of compression, after which a Stretch forming of the compressed blank while shaping the Wide-flat material takes place.
  • the advantage of the method according to the invention can be seen in particular in that the effectiveness of adversely affecting the toughness properties Areas in the material is reduced. The emergence of these areas is not yet scientifically clarified, why these zones in the material can certainly not adversely affect mechanical properties can be interpreted because in these areas or zones the in a sleep test are etched darker, there is a rather finer globulitic carbide structure.
  • the blank with a Cross-sectional shape creates a difference in the subsequent reshaping the degree of deformation in the width and thickness direction of at most 2 times required, there are slight deviations of the mechanical in these directions Property before and much higher impact bending work values are achieved than this is given in a hot isostatically pressed, undeformed workpiece are.
  • the hot isostatically pressed blank one Compression forming at forging temperature is subjected to what so-called stretching or stretch forging of the upset forging in which a wide-flat profile is created, as found, the values for the impact bending work of the material in the transverse and in the thickness direction of the profile are essentially the same and are around 80% of the values in Longitudinal direction of the material are given.
  • the hot isostatically pressed blank or a slightly deformed forging blank subjected to a diffusion annealing treatment, whereupon the final deformation takes place so are high according to the invention, in particular in a wide-flat material Toughness values of the material also reached in the thickness direction.
  • the methods according to the invention solve the problem of an essential one Anisotropy in powder-metallurgically manufactured wide-flat materials, especially in ledeburitic steels of this cross-sectional shape, and increase entirely generally the resilience of such manufactured products.
  • an advantageous use properties specifying the object of the aforementioned type is solved by that the toughness of the material, measured in any direction, especially in Thickness direction of the cross section of the material is larger than that of the Material in the hot isostatically pressed, undeformed state.
  • the main advantage of the material created in this way is that that tools made from it are less sensitive to notches and therefore endure much higher voltages and shock loads. So were for example, from the face of a wide-flat material more conventional Production and creation according to the invention hot-pressed dies manufactured and in tested in practical use. The service life of the tool from conventional Material was extremely low, it occurred after 33 sudden pressings Breaking off a projecting profile part, whereby no other wear or wear was found. Created the same way for the same product According to the invention by similar material deformations in width and Width-flat material created over 3,000 pressings, after which the tool was rejected due to abrasive wear.
  • Material with the format 550mm square and 800 x 220 mm was after the HIP process, whereupon on the one hand a direct deformation of a square and rectangular material to a rod cross section of 550 x 100 mm. On Another square material was at a temperature before the deformation of 38 ° C below the solidus temperature determined in the heating table microscope annealed for 43 hours. Finally, one was hot isostatic pressed blank before forming to the cross-sectional format 550 x 100 mm an upsetting to 48% of the original height. For comparison purposes, a hot isostatically pressed undeformed material is provided.
  • Fig. 2 relates to a wide-flat material made from a block 550 mm
  • test values T-S and T-L as well as S-T and S-L are all the same Scattering range, so that only one size or one value in FIGS. 2 to 5 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)
EP01890047A 2000-03-03 2001-02-23 Matériau préparé par métallurgie des poudres avec isotropie améliorée des propriétés mécaniques Expired - Lifetime EP1129803B1 (fr)

Priority Applications (1)

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

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
AT3492000 2000-03-03

Related Child Applications (1)

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

Publications (3)

Publication Number Publication Date
EP1129803A2 true EP1129803A2 (fr) 2001-09-05
EP1129803A3 EP1129803A3 (fr) 2001-10-04
EP1129803B1 EP1129803B1 (fr) 2006-12-20

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 Before (1)

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

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)

Cited By (2)

* 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
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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (15)

* 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
DE3530741C1 (de) * 1985-08-28 1993-01-14 Avesta Nyby Powder AB, Torshälla Verfahren zur Herstellung pulvermetallurgischer Gegenstaende
CH673241A5 (fr) * 1986-08-12 1990-02-28 Bbc Brown Boveri & Cie
DD279428A1 (de) * 1989-01-16 1990-06-06 Freiberg Bergakademie Verfahren zur pulvermetallurgischen herstellung von halbzeug aus schnellarbeitsstahl
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

Cited By (2)

* 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
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

Also Published As

Publication number Publication date
DE50111660D1 (de) 2007-02-01
EP1779947A1 (fr) 2007-05-02
PT1129803E (pt) 2007-03-30
DK1129803T3 (da) 2007-04-30
US20010022945A1 (en) 2001-09-20
EP1129803B1 (fr) 2006-12-20
AT409831B (de) 2002-11-25
ATA3492000A (de) 2002-04-15
ES2275645T3 (es) 2007-06-16
EP1129803A3 (fr) 2001-10-04
JP2010047840A (ja) 2010-03-04
ATE348673T1 (de) 2007-01-15
JP2001316706A (ja) 2001-11-16
US6630102B2 (en) 2003-10-07

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