EP1382704B1 - Acier pour travail à froid avec résistance à l'usure élevée - Google Patents

Acier pour travail à froid avec résistance à l'usure élevée Download PDF

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Publication number
EP1382704B1
EP1382704B1 EP20030450155 EP03450155A EP1382704B1 EP 1382704 B1 EP1382704 B1 EP 1382704B1 EP 20030450155 EP20030450155 EP 20030450155 EP 03450155 A EP03450155 A EP 03450155A EP 1382704 B1 EP1382704 B1 EP 1382704B1
Authority
EP
European Patent Office
Prior art keywords
cold work
work steel
max
wear resistance
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
EP20030450155
Other languages
German (de)
English (en)
Other versions
EP1382704A1 (fr
Inventor
Werner Dipl.Ing. Liebfahrt
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 Boehler Edelstahl GmbH
Original Assignee
Boehler 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 Boehler Edelstahl GmbH filed Critical Boehler Edelstahl GmbH
Priority to AT03450155T priority Critical patent/ATE281541T1/de
Priority to SI200330014T priority patent/SI1382704T1/xx
Publication of EP1382704A1 publication Critical patent/EP1382704A1/fr
Application granted granted Critical
Publication of EP1382704B1 publication Critical patent/EP1382704B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon

Definitions

  • the invention relates to a cold work tool with high wear resistance for powder metallurgically produced workpieces and tools with high toughness and Strength.
  • Cold work steels with high resistance to wear have a structure in their structure a matrix embedded high hard phase content, in particular carbides, which the substantiate high abrasion resistance.
  • carbides which the substantiate high abrasion resistance.
  • high toughness and hardness of the material are the carbide formation and the matrix property, in particular their increased strength of importance.
  • a cold work steel alloy for the powder metallurgical production of parts, especially tools with high toughness and hardness, as well as resistance to Wear and fatigue is described in the Austrian patent application no. Called 587/2001.
  • Such a chemically composed material can quite high mechanical property values provide quality assurance. Indeed are often at a full through hardening of large workpieces especially at deep hardening temperatures a grain boundary assignment with chromium-containing Mixed carbides are found, whereby the toughness potential of the alloy is not is fully exploitable. In many cases, an increased Material toughness of the product and a simpler Heat treatment technology for this desired.
  • the invention is based on the object a cold work tool steel with high wear resistance for powder metallurgy produced workpieces and tools with high toughness and strength too create, which even with simple thermal compensation and / or lesser Hardening temperature reaches a desired level of properties.
  • the advantages achieved by the invention are to be seen in particular in that it by alloying measures or by using the Interaction of the activities controlling the structural transformation and the carbide - forming elements has succeeded, on the one hand the through - hardenability of the Material to increase and on the other hand to achieve a solid solution hardening, even at low curing temperatures a pre-eutectic Carbide precipitation, especially at the grain boundaries is reduced.
  • Chromium can on the one hand, individually, at least three carbide formations with form different carbon concentrations and is slightly more metallic than metallic Component introduced by substitution in mixed carbides, the chromium content influenced, but on the other hand also significantly the hardness behavior as Acid acceptance, through hardenability, secondary hardness formation of the material. in principle increasing Chomgehalte retard the structural transformation when hardening or increase the Einhärteiefe and thus act in particular with nickel and manganese similar.
  • the elements are chorm, manganese, nickel and cobalt in the invention Set concentration limits, with the preferred content ranges a Increase of mechanical material values and quality assurance of the material cause.
  • one or more than one accompanying element has the following concentration values in% by weight: sulfur (S) to 0.03, preferably to 0.025 niobium (Nb) to 0.01, preferably to 0.006 nitrogen (N) to 0.09, preferably to 0.08 aluminum (Al) to 0.05, preferably to 0.04 and / or more than one impurity element has the following concentration values in% by weight: phosphorus (P) max 0.025 oxygen (O) max 0.009
  • Tab. 1 shows the chemical composition of a cold work steel alloy according to the invention with the designation Leg. K and those of comparative alloys described by Leg. A to Leg. J, can be seen.
  • Tab. 2 shows the test results, namely the bending strength, the impact bending work and the wear resistance, with the deformed specimens being tempered to the same hardness of 61 HRC.
  • the pre-load F r was 200 N
  • the speed to full pre-load was 2 mm / min
  • the test speed was 5 mm / min.
  • Fig. 3 the device used for determining the wear resistance of the materials is shown schematically.
  • Fig. 1 shows in a bar graph the superior bending strength of the leg according to the invention. K, wherein the prior art corresponding comparison materials A to J each have high bending fracture values.
  • the alloy according to the invention is in the range of the best materials for this type of stress.
  • the cold work steel composed according to the invention has an outstanding property level with regard to toughness and strength and has a comparable wear resistance in comparison with the best alloys of the prior art.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Claims (7)

  1. Acier pour travail à froid avec une haute résistance à l'usure pour des pièces ouvrées et des outils de haute ténacité et de haute résistance fabriqués par métallurgie des poudres, contenant les éléments d'alliage en pour-cent en poids : Carbone (C) 2,21 à 2,64 Silicium (Si) 0,08 à 1,1 Manganèse (Mn) 0,05 à 1,1 Chrome (Cr) 3,71 à 4,69 Molybdène (Mo) 3,1 à 4,4 Nickel (Ni) 0,14 à 0,3 Vanadium (V) 8,45 à 9,5 Tungstène (W) 0,5 à 1,5 Cobalt (Co) 1,1 à 4,9
       ainsi que les éléments accessoires : Soufre (S) jusqu'à 0,3 Niobium (Nb) jusqu'à 0,1 Azote (N) jusqu'à 0,1 Aluminium (Al) jusqu'à 0,06 Titane (Ti) jusqu'à 0,01
       les éléments constituant des impuretés : Phosphore (P) max. 0,029 Oxygène (O) max. 0,03
       et l'élément de base : Fer (Fe) comme reste.
  2. Acier pour travail à froid selon la revendication 1, remplissant la condition que le rapport du vanadium à la somme molybdène plus tungstène soit de 1,5 à 2,2 : VMo + W    = 1,5 bis 2,2
  3. Acier pour travail à froid selon la revendication 1 ou 2, remplissant la condition que le rapport de la somme chrome plus manganèse plus nickel au cobalt soit de 2,05 à 2,95 : Cr + Mn + NiCo    = 2,05 à 2,95
  4. Acier pour travail à froid selon l'une quelconque des revendications 1 à 3, pour lequel un ou plus d'un élément présentent les valeurs de concentrations suivantes en pour-cent en poids : Carbone (C) = 2,3 à 2,6 de préférence 2,4 à 2,55 Silicium (Si) = 0,3 à 0,8 de préférence 0,42 à 0,68 Manganèse (Mn) = 0,15 à 0,8 de préférence 0,3 à 0,55 Chrome (Cr) = 3,85 à 4,58 de préférence 4,0 à 4,45 Molybdène (Mo) = 3,31 à 4,18 de préférence 3,55 à 3,98 Nickel (Ni) = 0,16 à 0,25 Vanadium (V) = 8,61 à 9,34 de préférence 8,81 à 9,2 Tungstène (W) = 0,7 à 1,3 de préférence 0,75 à 1,25 Cobalt (Co) = 0,1 à 3,82 de préférence 1,61 à 2,42
  5. Acier pour travail à froid selon l'une quelconque des revendications 1 à 4, pour lequel un ou plus d'un élément accessoire présentent les valeurs de concentrations suivantes en pour-cent en poids : Soufre (S) jusqu'à 0,03 de préférence jusqu'à 0,025 Niobium (Nb) jusqu'à 0,01 de préférence jusqu' à 0,006 Azote (N) jusqu'à 0,09 de préférence jusqu'à 0,08 Aluminium (Al) jusqu'à 0,05 de préférence jusqu'à 0,04
  6. Acier pour travail à froid selon l'une quelconque des revendications 1 à 5, pour lequel un ou plus d'un élément constituant une impureté présente les concentrations suivantes en pour-cent en poids : Phosphore (P) max. 0,025 Oxygène (O) max. 0,009
  7. Objet fabriqué par métallurgie des poudres en acier pour travail à froid avec une composition chimique selon l'une quelconque des revendications précédentes et une pureté correspondant à une valeur K0 selon DIN 50602 inférieure ou égale à 3,0.
EP20030450155 2002-07-08 2003-06-23 Acier pour travail à froid avec résistance à l'usure élevée Expired - Lifetime EP1382704B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT03450155T ATE281541T1 (de) 2002-07-08 2003-06-23 Kaltarbeitsstahl mit hohem verschleisswiderstand
SI200330014T SI1382704T1 (en) 2002-07-08 2003-06-23 Cold work steel with high wear resistance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT10272002A AT411534B (de) 2002-07-08 2002-07-08 Kaltarbeitsstahl mit hohem verschleisswiderstand
AT10272002 2002-07-08

Publications (2)

Publication Number Publication Date
EP1382704A1 EP1382704A1 (fr) 2004-01-21
EP1382704B1 true EP1382704B1 (fr) 2004-11-03

Family

ID=3684300

Family Applications (1)

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EP20030450155 Expired - Lifetime EP1382704B1 (fr) 2002-07-08 2003-06-23 Acier pour travail à froid avec résistance à l'usure élevée

Country Status (8)

Country Link
EP (1) EP1382704B1 (fr)
AT (1) AT411534B (fr)
DE (1) DE50300134D1 (fr)
DK (1) DK1382704T3 (fr)
ES (1) ES2232809T3 (fr)
HK (1) HK1064129A1 (fr)
PT (1) PT1382704E (fr)
SK (1) SK286758B6 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034905A1 (de) 2004-07-19 2006-04-13 Böhler-Uddeholm Precision Strip GmbH & Co. KG Stahlband für Streichmesser, Auftragsmesser und Kreppschaber und pulvermetallurgisches Verfahren zu ihrer Herstellung
US20150007704A1 (en) * 2013-07-08 2015-01-08 Branson Ultrasonics Corporation Ultrasonic steel horn for tire cutting and method of manufacturing
EP2933345A1 (fr) * 2014-04-14 2015-10-21 Uddeholms AB Acier à outils pour travail à froid
CN111850384B (zh) * 2020-06-16 2021-07-09 河南中钻新材料有限公司 一种高性能摩托车刹车盘材料及制备方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0430241B1 (fr) * 1989-11-30 1996-01-10 Hitachi Metals, Ltd. Cylindre de laminoir composite bimétallique résistant à l'usure
FR2722211B1 (fr) * 1994-07-06 1996-08-30 Thyssen Aciers Speciaux Sa Acier pour outils de mise en forme
JPH11246949A (ja) * 1998-03-03 1999-09-14 Hitachi Metals Ltd 耐亀裂性に優れたハイス系焼結合金およびそれを用いた圧延用ロール
AT410448B (de) * 2001-04-11 2003-04-25 Boehler Edelstahl Kaltarbeitsstahllegierung zur pulvermetallurgischen herstellung von teilen

Also Published As

Publication number Publication date
ATA10272002A (de) 2003-07-15
SK286758B6 (sk) 2009-05-07
DE50300134D1 (de) 2004-12-09
PT1382704E (pt) 2005-04-29
AT411534B (de) 2004-02-25
DK1382704T3 (da) 2005-02-21
ES2232809T3 (es) 2005-06-01
HK1064129A1 (en) 2005-11-18
SK8622003A3 (en) 2004-01-08
EP1382704A1 (fr) 2004-01-21

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