EP2233596A1 - Objet en acier pour travail à froid - Google Patents

Objet en acier pour travail à froid Download PDF

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Publication number
EP2233596A1
EP2233596A1 EP10450028A EP10450028A EP2233596A1 EP 2233596 A1 EP2233596 A1 EP 2233596A1 EP 10450028 A EP10450028 A EP 10450028A EP 10450028 A EP10450028 A EP 10450028A EP 2233596 A1 EP2233596 A1 EP 2233596A1
Authority
EP
European Patent Office
Prior art keywords
less
article
work tool
hrc
cold work
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
EP10450028A
Other languages
German (de)
English (en)
Other versions
EP2233596B1 (fr
Inventor
Gerhard Dr. Dipl.-Ing. Jesner
Devrim Dr. Dipl.-Ing. Caliskanoglu
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 and Co KG
Original Assignee
Boehler Edelstahl GmbH and Co KG
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 and Co KG filed Critical Boehler Edelstahl GmbH and Co KG
Priority to SI201030447T priority Critical patent/SI2233596T1/sl
Publication of EP2233596A1 publication Critical patent/EP2233596A1/fr
Application granted granted Critical
Publication of EP2233596B1 publication Critical patent/EP2233596B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • 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%
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/248—Thermal after-treatment
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12049—Nonmetal component
    • Y10T428/12056—Entirely inorganic

Definitions

  • the invention relates to a cold work tool steel article, in particular tool with high compaction depth or high fürvergütungstool containing the alloying elements carbon, manganese, silicon, chromium, molybdenum, vanadium and tungsten, optionally the element niobium, as well as accompanying elements with a content of less than 0.4 Wt .-% and impurity elements and iron as the remainder.
  • the invention relates to a tool coated with hard material at a temperature of more than 500 ° C.
  • Cold work steels are alloys which, in the thermally tempered state, have a property profile with high hardness, high wear resistance and high material toughness, with good machinability and particular dimensional stability during hardening and tempering being important criteria. These cold work steels are used i.a. As tools in the stamping technique of plastic molding for fine cutting as a die plate and the like. Alloying these cold work steel materials are mostly geared to the tool manufacturing and the main load criteria in practical application.
  • a hardness of preferably at least 60 HRC and a high carbide content with uniform distribution of the carbides in a high-strength matrix of the material are important.
  • a simple annealing technology for the parts should be applicable, requiring a desired deep cure of the material below the quench surface.
  • a special hard material layer eg. a nitride, carbonitride or oxide carbide layer of the elements titanium, chromium, aluminum and the like.
  • a coating temperature of about 500 ° C further must the substrate, so the cold work tool article, this temperature load on the required or necessary coating time withstand or no significant decrease in the property values, in particular the hardness and toughness of the material experienced.
  • the present invention seeks to provide a thermally tempered material, which of conventional easily adjustable temperatures between 1030 ° C and 1080 ° C with increased cooling to great depths converted into a martensitic structure, high material hardness and toughness during tempering and up to temperatures of over 500 ° C for treatment times of up to several hours is resistant to wear and has high wear resistance.
  • the advantages achieved by the invention are essentially given by the fact that the alloying elements in their respective intended concentration in the material, as was found, are adjusted on the basis of the interaction of the carbide formers with the carbon concentration such that at a high solidification rate achieved by powder metallurgical production Formation of the carbide phases and the matrix solidification by atomic lattice strain yield high abrasion resistance and material strength with high tempering resistance and high material toughness.
  • the effective carbide-forming elements of the fifth and sixth groups in the Periodic System form carbides with different crystal structures and properties in the matrix.
  • carbides of type MC, M 4 C 3 and M 23 C 6 having cubic crystal structure and hexagonal- or trigonal-structured carbides of the type M 2 C with MC fractions and M 7 C 3 are formed according to the respective carbon activity corresponding to the respective carbon Concentration of the carbide-forming metal elements in interaction of the available, free carbon content, whereby a certain amount distribution of the carbide types is set in the matrix and in this by free, embedded alloy atoms, a material-strengthening lattice strain is achieved.
  • a cold work tool according to the invention can, as is familiar to the person skilled in the art, be produced only in the case of powder metallurgy production of the material with a microstructure which, if necessary, also provides the prerequisites for the task of material properties profile, with a hardness of greater than 60 HRC and a toughness with the extent of impact work of greater than 50 J represent the lower limits.
  • This alloying technique works to fine-tune the carbide grain size and, as found, is due to the action of Nb on solidification of the homogeneous melt in the presence of carbon and other carbide-forming elements.
  • Niobium as a strong monocarbide former as well as tungsten and molybdenum, which form M 2 C and MC carbides, usually form larger mixed carbides.
  • Niobium has only a slight tendency to mixed carbide formation, ie it represents fine, homogeneously distributed monocarbides, which are highly effective as carbide nuclei and ultimately result in a small carbide grain size in the matrix.
  • a cold work tool steel article having superior properties can be made most economically when it bears on the work surface a coating applied during annealing at a temperature of at least 500 ° C, optionally 550 ° C and higher.
  • At least one tempering treatment can be carried out simultaneously with a surface coating and an outstanding adhesion of the layer can be achieved.
  • the cold work tool article has a material hardness of greater than 62 HRC, in particular 63 to 65 HRC, measured at a material toughness SEP 1314 greater than 50 J, in particular greater than 55 J, is a extensive usability of the alloy at high loads.
  • Fig. 1 and Fig. 2 show the values of Tab. 1 in graphical representation.
  • Niobium K490-So
  • the toughness of the annealed material at substantially the same hardness.
  • Fig. 3 shows, for example, the material K490 with fine structure, which was achieved by a PM-production.
  • the size of the carbide particles can, as Fig. 4 can be reduced by alloying in the given case 0.46 wt .-% Nb, which leads to an increase in the material toughness. Associated with this are a faster dissolution of carbides during austenitizing of the material and a martensitic transformation when extinguishing to greater depths of the object.
  • Fig. 5 and Fig. 5A show the formation and the composition of carbides, which were formed with a nucleating effect of NbC.
  • Fig. 5 As a result, the high brightness tungsten-molybdenum carbides are smaller and more accurately confined relative to the matrix. In contrast, the slightly brighter vanadium-tungsten-molybdenum niobium carbides shown have a broad transition to the matrix. Examination of the carbide composition shows how Fig. 5A shows the germination of NbC in carbide formation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Powder Metallurgy (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Heat Treatment Of Steel (AREA)
EP10450028.5A 2009-03-12 2010-02-23 Objet en acier pour travail à froid Active EP2233596B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201030447T SI2233596T1 (sl) 2009-03-12 2010-02-23 Predmet iz jekla za delo v hladnem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0040209A AT508591B1 (de) 2009-03-12 2009-03-12 Kaltarbeitsstahl-gegenstand

Publications (2)

Publication Number Publication Date
EP2233596A1 true EP2233596A1 (fr) 2010-09-29
EP2233596B1 EP2233596B1 (fr) 2013-09-18

Family

ID=42122909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10450028.5A Active EP2233596B1 (fr) 2009-03-12 2010-02-23 Objet en acier pour travail à froid

Country Status (7)

Country Link
US (1) US8298313B2 (fr)
EP (1) EP2233596B1 (fr)
AT (1) AT508591B1 (fr)
BR (1) BRPI1000558B1 (fr)
CA (1) CA2696389C (fr)
DK (1) DK2233596T3 (fr)
SI (1) SI2233596T1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010005262B4 (de) 2009-01-21 2019-09-12 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung von eine Hartstoffbeschichtung aufweisenden Werkzeugen und deren Verwendungen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0275475A1 (fr) * 1986-12-30 1988-07-27 Uddeholm Tooling Aktiebolag Acier à outils
EP0425471A1 (fr) * 1989-10-23 1991-05-02 BÖHLER Edelstahl GmbH Acier à outils pour le façonnage à froid, à haute résistance à la compression et application de ces aciers
JPH04180541A (ja) * 1990-11-14 1992-06-26 Hitachi Metals Ltd 被削性に優れた冷間工具鋼
EP1249512A1 (fr) * 2001-04-11 2002-10-16 BÖHLER Edelstahl GmbH Acier d'ecrouissage pour la fabrication des composants selon la technique de la metallurgie des poudres
WO2003000944A1 (fr) * 2001-06-21 2003-01-03 Uddeholm Tooling Aktiebolag Acier d'ecrouissage
EP1471160A1 (fr) * 2003-04-24 2004-10-27 BÖHLER Edelstahl GmbH Objet en acier travaillé à froid

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809541A (en) * 1972-10-24 1974-05-07 G Steven Vanadium-containing tool steel article
SE456650C (sv) * 1987-03-19 1989-10-16 Uddeholm Tooling Ab Pulvermetallurgiskt framstaellt kallarbetsstaal
EP0483668B1 (fr) * 1990-10-31 1996-03-13 Hitachi Metals, Ltd. Acier rapide produit par frittage de poudre et son procédé de production
JP3517505B2 (ja) * 1996-01-16 2004-04-12 日立粉末冶金株式会社 焼結耐摩耗材用原料粉末
AT409389B (de) * 2001-04-11 2002-07-25 Boehler Edelstahl Pm-schnellarbeitsstahl mit hoher warmfestigkeit
US7615123B2 (en) * 2006-09-29 2009-11-10 Crucible Materials Corporation Cold-work tool steel article

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0275475A1 (fr) * 1986-12-30 1988-07-27 Uddeholm Tooling Aktiebolag Acier à outils
EP0425471A1 (fr) * 1989-10-23 1991-05-02 BÖHLER Edelstahl GmbH Acier à outils pour le façonnage à froid, à haute résistance à la compression et application de ces aciers
JPH04180541A (ja) * 1990-11-14 1992-06-26 Hitachi Metals Ltd 被削性に優れた冷間工具鋼
EP1249512A1 (fr) * 2001-04-11 2002-10-16 BÖHLER Edelstahl GmbH Acier d'ecrouissage pour la fabrication des composants selon la technique de la metallurgie des poudres
WO2003000944A1 (fr) * 2001-06-21 2003-01-03 Uddeholm Tooling Aktiebolag Acier d'ecrouissage
EP1471160A1 (fr) * 2003-04-24 2004-10-27 BÖHLER Edelstahl GmbH Objet en acier travaillé à froid

Also Published As

Publication number Publication date
CA2696389C (fr) 2015-02-10
AT508591A1 (de) 2011-02-15
CA2696389A1 (fr) 2010-09-12
DK2233596T3 (da) 2013-12-16
AT508591B1 (de) 2011-04-15
US8298313B2 (en) 2012-10-30
SI2233596T1 (sl) 2014-02-28
US20100233500A1 (en) 2010-09-16
BRPI1000558B1 (pt) 2018-04-03
BRPI1000558A2 (pt) 2011-03-22
EP2233596B1 (fr) 2013-09-18

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