EP0348380B1 - Utilisation d'un alliage à base de fer pour la fabrication de pièces frittées, présentant une haute résistance à la corrosion, une haute résistance à l'usure ainsi qu'une haute tenacité et résistance à la compression et destinées, en particulier, au travail des matières synthétiques - Google Patents

Utilisation d'un alliage à base de fer pour la fabrication de pièces frittées, présentant une haute résistance à la corrosion, une haute résistance à l'usure ainsi qu'une haute tenacité et résistance à la compression et destinées, en particulier, au travail des matières synthétiques Download PDF

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Publication number
EP0348380B1
EP0348380B1 EP89890163A EP89890163A EP0348380B1 EP 0348380 B1 EP0348380 B1 EP 0348380B1 EP 89890163 A EP89890163 A EP 89890163A EP 89890163 A EP89890163 A EP 89890163A EP 0348380 B1 EP0348380 B1 EP 0348380B1
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EP
European Patent Office
Prior art keywords
iron
content
weight
alloy
carbides
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
EP89890163A
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German (de)
English (en)
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EP0348380A1 (fr
EP0348380B2 (fr
Inventor
Alfred Dr. Kulmburg
Johann Dipl.-Ing. Stamberger
Hubert Dipl.-Ing. Lenger
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.)
Boehler Edelstahl alpha Edelstahl Gmbh boehle GmbH
Boehler GmbH Germany
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Boehler GmbH
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Publication date
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Application filed by Boehler GmbH filed Critical Boehler GmbH
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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%
    • C22C33/0285—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% with Cr, Co, or Ni having a minimum content higher than 5%

Definitions

  • the invention relates to the use of an iron-based alloy with a special composition as a material for the powder metallurgical production of parts with high corrosion resistance, high wear resistance and high toughness and pressure resistance, preferably for plastic molds, machine parts and tools for non-cutting shaping.
  • parts with high corrosion resistance, high wear resistance and high toughness and pressure resistance preferably for plastic molds, machine parts and tools for non-cutting shaping.
  • shaping parts are exposed to chemical and abrasive stresses at the same time, these parts having to have high material toughness, high pressure resistance and special material homogeneity due to the mechanical stresses.
  • Such requirements are placed, for example, on materials that are used in devices for pressing fiber-reinforced or filler-containing plastics.
  • Austenitic steels or chrome steels with a chromium content of approx. 18%, for example alloys according to DIN material no., are used for mechanical components such as screws etc. and also for forming and pressing tools, which are particularly exposed to corrosive stresses. 1.4528. Although such materials have sufficient corrosion resistance, the wear behavior is usually unsatisfactory in practical operation.
  • the invention is based on the object of avoiding the above disadvantages and, in particular, of creating materials which can be used advantageously for the plastics processing industry and which, due to a special composition when using certain manufacturing processes, provide high corrosion resistance, high wear resistance and high pressure resistance have good toughness properties.
  • the invention therefore relates to the use of an iron-based alloy with a composition in% by weight.
  • the matrix has a chromium content of at least 13% after hardening and tempering and the carbide content is at least 25% by volume, of which at least 5% by volume of the carbides are formed as MC carbides, the carbide grain size being less than 14 ⁇ m.
  • the material has a niobium content of 0.2 to 3.0 and / or a titanium content of 0.2 to 3.5 and / or a boron content of 0.001 to 0.002. It is particularly preferred if the value is formed from
  • the alloy according to the invention from a minimum value which takes into account the concentrations and the respective effect with the mutual influence of the carbide-forming elements chromium, vanadium, niobium and titanium and by which the wear resistance of the material in particular is determined, in certain narrow Limits set carbon contents and when using powder metallurgical manufacturing processes, materials that have high corrosion resistance, high wear resistance, high pressure resistance and high toughness at the same time and are advantageous, especially for the construction of plastic molds, can be used, the hardened and tempered state of the Chromium content in all areas of the matrix and the proportion as well as the composition and the grain size of the carbides can be adjusted according to the invention.
  • an alloy powder was produced in the gas atomization process. After the powder had been poured into a capsule with a diameter of 250 mm and the capsule had been evacuated and sealed gas-tight, it was thermoformed at 1110 ° C. using a 6-fold degree of deformation. After soft annealing at 880 to 900 ° C and slow cooling, plastic molds were made from the forging rod. The hardness of the material was approx. 280 HB. The parts were hardened after heating to a temperature of 1140 ° C. by cooling in a warm bath, whereupon a hardness value of 61 HRC was measured. After tempering at 540 ° C the material hardness was 59 HRC.
  • the wear behavior of the part was tested in the grinding wheel test, in which a steel disc rotates in a corundum-water mixture, against which the sample is pressed. The following wear conditions were applied:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Claims (7)

1. Utilisation d'un alliage à base de fer, dont la composition en % de poids est la suivante :
Figure imgb0023
Fer et impuretés dues à la fabrication pour le reste, la valeur représentée par
Figure imgb0024
étant supérieure à 8,8 et la teneur en carbone de l'alliage s'élevant pour le minimum à la relation :
Figure imgb0025
et pour le maximum à la relation :
Figure imgb0026
cet alliage servant à la fabrication de pièces frittées présentant une haute résistance à la corrosion et une haute résistance à l'usure,ainsi qu'une haute ténacité et résistance à la compression, destinées, en particulier, à des moules pour matières synthétiques, à des pièces de machines et à des outillages pour formage, sous réserve qu'après le durcissement et le revenu, la matrice présente une teneur en chrome d'au moins 13% et que la teneuren carbure s'élève en volume au minimum à 25%, dans au moins 5% en volume de carbure-MC, la grosseur de grain du carbure étant inférieure à 14 µm.
2. Utilisation d'un alliage à base de fer selon la revendication 1, caractérisée en ce que l'alliage présente la composition suivante en % de poids :
Figure imgb0027
Figure imgb0028
Fer et impuretés dues à la fabrication pour le reste.
3. Utilisation d'un alliage à base de fer selon la revendication 1 ou 2, caractérisée en ce que la valeur représentée par
Figure imgb0029
est supérieure à 10,0.
4. Utilisation d'un alliage à base de fer selon l'une des revendications 1 à 3, présentant une teneur en niobium s'élevant, quant au % en poids, de 0,2 à 3,0.
5. Utilisation d'un alliage à base de fer selon l'une des revendications 1 à 4, dont la teneur en titane s'élève de 0, 2 à 3, 5,
6. Utilisation d'un alliage à base de fer selon l'une des revendications 1 à 5, dont la teneur en bore s'élève de 0,001 à 0,002.
7. Utilisation d'un alliage à base de fer selon les revendications 1 à 6, dont la teneur en carbone s'élève, quant au % en poids au minimum à 1,8, mais au plus, cependant,à 6,2.
EP89890163A 1988-06-21 1989-06-14 Utilisation d'un alliage à base de fer pour la fabrication de pièces frittées, présentant une haute résistance à la corrosion, une haute résistance à l'usure ainsi qu'une haute tenacité et résistance à la compression et destinées, en particulier, au travail des matières synthétiques Expired - Lifetime EP0348380B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0159988A AT393642B (de) 1988-06-21 1988-06-21 Verwendung einer eisenbasislegierung zur pulvermetallurgischen herstellung von teilen mit hoher korrosionsbestaendigkeit, hoher verschleissfestigkeit sowie hoher zaehigkeit und druckfestigkeit, insbesondere fuer die kunststoffverarbeitung
AT1599/88 1988-06-21

Publications (3)

Publication Number Publication Date
EP0348380A1 EP0348380A1 (fr) 1989-12-27
EP0348380B1 true EP0348380B1 (fr) 1992-11-19
EP0348380B2 EP0348380B2 (fr) 1996-04-17

Family

ID=3516903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89890163A Expired - Lifetime EP0348380B2 (fr) 1988-06-21 1989-06-14 Utilisation d'un alliage à base de fer pour la fabrication de pièces frittées, présentant une haute résistance à la corrosion, une haute résistance à l'usure ainsi qu'une haute tenacité et résistance à la compression et destinées, en particulier, au travail des matières synthétiques

Country Status (8)

Country Link
EP (1) EP0348380B2 (fr)
JP (1) JP2583451B2 (fr)
AT (2) AT393642B (fr)
AU (1) AU615756B2 (fr)
DE (1) DE58902742D1 (fr)
ES (1) ES2052971T5 (fr)
PT (1) PT90925B (fr)
ZA (1) ZA894703B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5900560A (en) * 1995-11-08 1999-05-04 Crucible Materials Corporation Corrosion resistant, high vanadium, powder metallurgy tool steel articles with improved metal to metal wear resistance and method for producing the same

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2684736B2 (ja) * 1988-12-27 1997-12-03 大同特殊鋼株式会社 粉末冷間工具鋼
AT405193B (de) * 1995-01-16 1999-06-25 Boehler Edelstahl Verwendung einer chromhältigen, martensitischen eisenbasislegierung für kunststofformen
GB2298869B (en) * 1995-03-10 1999-03-03 Powdrex Ltd Stainless steel powders and articles produced therefrom by powder metallurgy
US5679908A (en) * 1995-11-08 1997-10-21 Crucible Materials Corporation Corrosion resistant, high vanadium, powder metallurgy tool steel articles with improved metal to metal wear resistance and a method for producing the same
DE19924515A1 (de) * 1999-05-28 2000-11-30 Edelstahl Witten Krefeld Gmbh Sprühkompaktierter Stahl, Verfahren zu seiner Herstellung und Verbundwerkstoff
ES2240351T3 (es) * 2001-11-13 2005-10-16 Fundacion Inasmet Procedimiento de fabricacion de productos hechos de materiales metalicos estructurales reforzados con carburos.
SE0200429D0 (sv) * 2002-02-15 2002-02-15 Uddeholm Tooling Ab Stållegering och verktyg tillverkat av stållegeringen
US20060231167A1 (en) * 2005-04-18 2006-10-19 Hillstrom Marshall D Durable, wear-resistant punches and dies
AT501794B1 (de) * 2005-04-26 2008-06-15 Boehler Edelstahl Kunststoffform
SE535090C2 (sv) * 2010-03-17 2012-04-10 Uddeholms Ab Förfarande för framställning av en slitplatta för en bandsågsbladstyrning, en sådan slitplatta, samt användning av ett stålmaterial för tillverkning av slitplattan
CN103060700B (zh) * 2013-01-07 2014-12-31 北京工业大学 硼化物颗粒强化Fe-Cr-Al复合材料及其制造方法
CN104878298B (zh) * 2015-05-15 2017-05-03 安泰科技股份有限公司 粉末冶金耐磨损耐腐蚀合金
DE102017115396A1 (de) * 2017-07-10 2019-01-10 Saar-Pulvermetall GmbH Rolle für eine Mahl- oder/und Pressvorrichtung, insbesondere Kollerrolle für eine Presse zur Herstellung von Pellets, und Verfahren zur Herstellung der Rolle
CN111850427A (zh) * 2020-06-07 2020-10-30 江苏钢银智能制造有限公司 一种合金钢材料及其钢板材加工铸造工艺

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA953540A (en) * 1970-08-28 1974-08-27 Hoganas Ab High alloy steel powders and their consolidation into homogeneous tool steel
DE2204886C3 (de) * 1972-02-02 1979-11-22 Gfe Gesellschaft Fuer Elektrometallurgie Mbh, 4000 Duesseldorf Verfahren zur pulvermetallurgischen Herstellung von Schnellarbeitsstahl-Formkörpern
US4249945A (en) * 1978-09-20 1981-02-10 Crucible Inc. Powder-metallurgy steel article with high vanadium-carbide content
SE446277B (sv) * 1985-01-16 1986-08-25 Kloster Speedsteel Ab Vanadinhaltigt verktygsstal framstellt av metallpulver och sett vid dess framstellning
US4765836A (en) * 1986-12-11 1988-08-23 Crucible Materials Corporation Wear and corrosion resistant articles made from pm alloyed irons

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5900560A (en) * 1995-11-08 1999-05-04 Crucible Materials Corporation Corrosion resistant, high vanadium, powder metallurgy tool steel articles with improved metal to metal wear resistance and method for producing the same

Also Published As

Publication number Publication date
DE58902742D1 (de) 1992-12-24
AT393642B (de) 1991-11-25
ES2052971T3 (es) 1994-07-16
AU615756B2 (en) 1991-10-10
JPH0277556A (ja) 1990-03-16
JP2583451B2 (ja) 1997-02-19
EP0348380A1 (fr) 1989-12-27
ATA159988A (de) 1991-05-15
PT90925B (pt) 1997-10-31
ZA894703B (en) 1992-01-29
PT90925A (pt) 1989-12-29
EP0348380B2 (fr) 1996-04-17
ES2052971T5 (es) 1996-10-01
AU3666289A (en) 1990-01-25
ATE82595T1 (de) 1992-12-15

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