EP1129803A2 - Pulvermetallurgisch hergestelltes Material mit verbesserter Isotropie der mechanischen Eigenschaften - Google Patents
Pulvermetallurgisch hergestelltes Material mit verbesserter Isotropie der mechanischen Eigenschaften Download PDFInfo
- 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
Links
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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.
Landscapes
- 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)
Abstract
Description
Aus einer Schmelze mit einer Zusammensetzung in Gew.-% von
C = 1,3, Si = 0,63, Mn = 0,24, S = 0,013, P = 0,019, Cr = 3,83, 0 = 4,87, W = 6,11, V = 3,03, Co = 0,40, Cu = 0,013, Sn = 0,011 wurde, nach dem Gaszerstäubungsverfahren mit Stickstoff, Pulver mit einer mittleren Korngröße von 0,09 mm gefertigt.
Claims (4)
- Verfahren zur pulvermetallurgischen Herstellung von verbesserte Isotropie der mechanischen Eigenschaften aufweisendem Material mit reckteckigem oder flachelliptischem Querschnitt, sogenannten Breit-Flach-Material, insbesondere Vormaterial für die Herstellung von Schneid-, Stanz- und Umformwerkzeugen, bei welchem Verfahren ein mit Gas hergestelltes, insbesondere mit Stickstoff verdüstes Pulver einer Legierung in eine Kapsel eingebracht, verdichtet und diese, gegebenenfalls nach einem Evakuieren, verschlossen wird, wonach ein Erwärmen und isostatisches Pressen (HIP-en) der Pulverkapsel erfolgen und der derart hergestellte heißisostatisch gepreßte Rohling einer Verformung durch Schmieden und/oder Walzen unterworfen wird, dadurch gekennzeichnet, daß ein Rohling mit einer derart rechteckigen oder flachellipischen Querschnittsform erstellt und einer Umformung unterworfen wird, daß bei dieser der Unterschied zwischen der Verformung in Richtung der Breite und der Verformung in Dickenrichtung des Querschnittes des Breit-Flach-Materials höchstens das 2-fache, vorzugsweise höchstens das 1,5-fache des niedrigeren Verformungswertes beträgt.
- Verfahren zur pulvermetallurgischen Herstellung von verbesserte Isotropie der mechanischen Eigenschaften aufweisendem Material mit reckteckigem oder flachelliptischem Querschnitt, sogenannten Breit-Flach-Material, insbesondere Vormaterial für die Herstellung von Schneid- und Stanzwerkzeugen, bei welchem Verfahren ein mit Gas hergestelltes, insbesondere mit Stickstoff verdüstes Pulver einer Legierung in eine Kapsel eingebracht, verdichtet und diese, gegebenenfalls nach einem Evakuieren, verschlossen wird, wonach ein Erwärmen und isostatisches Pressen (HIP-en) der Pulverkapsel erfolgen und der derart hergestellte heißisostatisch gepreßte Rohling einer Verformung durch Schmieden und/oder Walzen unterworfen wird, dadurch gekennzeichnet, daß der heißisostatisch gepreßte Rohling in Richtung der Längserstreckung einer Stauchumformung mit einem mindestens zweifachen Stauchgrad unterworfen wird, wonach eine Reckumformung des gestauchten Rohlings unter Ausformung des Breit-Flach-Materials erfolgt.
- Verfahren zur pulvermetallurgischen Herstellung von verbesserte Isotropie der mechanischen Eigenschaften aufweisendem Material mit reckteckigem oder flachelliptischem Querschnitt, sogenannten Breit-Flach-Material, insbesondere Vormaterial für die Herstellung von Schneid- und Stanzwerkzeugen, bei welchem Verfahren ein mit Gas hergestelltes, insbesondere mit Stickstoff verdüstes Pulver einer Legierung in eine Kapsel eingebracht, verdichtet und diese, gegebenenfalls nach einem Evakuieren, verschlossen wird, wonach ein Erwärmen und isostatisches Pressen (HIP-en) der Pulverkapsel erfolgen und der derart hergestellte heißisostatisch gepreßte Rohling einer Verformung durch Schmieden und/oder Walzen unterworfen wird, dadurch gekennzeichnet, daß der heißisostatisch gepreßte Rohling einer Diffusionsglühbehandlung mit einer höchsten Temperatur von 20°C unterhalb der Solidustemperatur der Legierung und einer Mindestglühdauer von 4 Stunden unterworfen wird, wonach dieser durch Reckumformung zu einem Breit-Flach-Material geschmiedet und/oder gewalzt wird.
- Pulvermetallurgisch hergestelltes Material mit rechteckigem oder flachelliptischem Querschnitt, sogenanntes Breit-Flach-Material mit einer Breite die mindestens das 3,1-fache der Dicke beträgt und einen Verformungsgrad von mindestens 4-fach aufweist, insbesondere hergestellt nach einem der vorgenannten Verfahren, dadurch gekennzeichnet, daß die Zähigkeit des Werkstoffes gemessen in jeglicher Richtung, insbesondere in Dickenrichtung des Querschnittes des Materials, größer ist als jene des Werkstoffes im heißisostatisch gepreßten, unverformten Zustand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06025501A EP1779947A1 (de) | 2000-03-03 | 2001-02-23 | Pulvermetallurgisch hergestelltes Material mit verbesserter Isotropie der mechanischen Eigenschaften |
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 (de) | 2000-03-03 | 2001-02-23 | Pulvermetallurgisch hergestelltes Material mit verbesserter Isotropie der mechanischen Eigenschaften |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1129803A2 true EP1129803A2 (de) | 2001-09-05 |
| EP1129803A3 EP1129803A3 (de) | 2001-10-04 |
| EP1129803B1 EP1129803B1 (de) | 2006-12-20 |
Family
ID=3672384
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01890047A Expired - Lifetime EP1129803B1 (de) | 2000-03-03 | 2001-02-23 | Pulvermetallurgisch hergestelltes Material mit verbesserter Isotropie der mechanischen Eigenschaften |
| EP06025501A Ceased EP1779947A1 (de) | 2000-03-03 | 2001-02-23 | Pulvermetallurgisch hergestelltes Material mit verbesserter Isotropie der mechanischen Eigenschaften |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06025501A Ceased EP1779947A1 (de) | 2000-03-03 | 2001-02-23 | Pulvermetallurgisch hergestelltes Material mit verbesserter Isotropie der mechanischen Eigenschaften |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6630102B2 (de) |
| EP (2) | EP1129803B1 (de) |
| JP (2) | JP2001316706A (de) |
| AT (2) | AT409831B (de) |
| DE (1) | DE50111660D1 (de) |
| DK (1) | DK1129803T3 (de) |
| ES (1) | ES2275645T3 (de) |
| PT (1) | PT1129803E (de) |
Cited By (2)
| 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)
| 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 (de) * | 2012-05-08 | 2013-11-13 | Böhler Edelstahl GmbH & Co KG | Werkstoff mit hoher Beständigkeit gegen Verschleiss |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE279428C (de) | ||||
| 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 (de) * | 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 |
-
2000
- 2000-03-03 AT AT0034900A patent/AT409831B/de not_active IP Right Cessation
-
2001
- 2001-02-23 ES ES01890047T patent/ES2275645T3/es not_active Expired - Lifetime
- 2001-02-23 EP EP01890047A patent/EP1129803B1/de not_active Expired - Lifetime
- 2001-02-23 DE DE50111660T patent/DE50111660D1/de not_active Expired - Lifetime
- 2001-02-23 DK DK01890047T patent/DK1129803T3/da active
- 2001-02-23 JP JP2001097353A patent/JP2001316706A/ja active Pending
- 2001-02-23 AT AT01890047T patent/ATE348673T1/de active
- 2001-02-23 EP EP06025501A patent/EP1779947A1/de not_active Ceased
- 2001-02-23 PT PT01890047T patent/PT1129803E/pt unknown
- 2001-03-02 US US09/796,452 patent/US6630102B2/en not_active Expired - Lifetime
-
2009
- 2009-08-25 JP JP2009212395A patent/JP2010047840A/ja active Pending
Cited By (2)
| 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 |
|---|---|
| EP1779947A1 (de) | 2007-05-02 |
| DK1129803T3 (da) | 2007-04-30 |
| DE50111660D1 (de) | 2007-02-01 |
| JP2010047840A (ja) | 2010-03-04 |
| ATE348673T1 (de) | 2007-01-15 |
| ATA3492000A (de) | 2002-04-15 |
| US6630102B2 (en) | 2003-10-07 |
| PT1129803E (pt) | 2007-03-30 |
| ES2275645T3 (es) | 2007-06-16 |
| US20010022945A1 (en) | 2001-09-20 |
| EP1129803A3 (de) | 2001-10-04 |
| EP1129803B1 (de) | 2006-12-20 |
| JP2001316706A (ja) | 2001-11-16 |
| AT409831B (de) | 2002-11-25 |
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