EP1249512B1 - Acier d'ecrouissage pour la fabrication des composants selon la technique de la metallurgie des poudres - Google Patents

Acier d'ecrouissage pour la fabrication des composants selon la technique de la metallurgie des poudres Download PDF

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Publication number
EP1249512B1
EP1249512B1 EP02450076A EP02450076A EP1249512B1 EP 1249512 B1 EP1249512 B1 EP 1249512B1 EP 02450076 A EP02450076 A EP 02450076A EP 02450076 A EP02450076 A EP 02450076A EP 1249512 B1 EP1249512 B1 EP 1249512B1
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EP
European Patent Office
Prior art keywords
powder
cold work
tool
work steel
weight
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
EP02450076A
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German (de)
English (en)
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EP1249512A1 (fr
Inventor
Werner Dipl.Ing Liebfart
Roland Dipl.Ing Rabitsch
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
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Filing date
Publication date
Application filed by Boehler Edelstahl GmbH filed Critical Boehler Edelstahl GmbH
Priority to AT02450076T priority Critical patent/ATE340877T1/de
Priority to SI200230445T priority patent/SI1249512T1/sl
Publication of EP1249512A1 publication Critical patent/EP1249512A1/fr
Application granted granted Critical
Publication of EP1249512B1 publication Critical patent/EP1249512B1/fr
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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
    • 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
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • B22F9/082—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 atomising using a fluid
    • B22F2009/0896—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 atomising using a fluid particle transport, separation: process and apparatus
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2241/00—Treatments in a special environment
    • C21D2241/01—Treatments in a special environment under pressure
    • C21D2241/02—Hot isostatic pressing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working

Definitions

  • the invention relates to a cold work steel alloy for powder metallurgy production of parts, in particular tools, with high toughness and hardness and resistance to wear and fatigue.
  • Tools and tool parts are usually claimed multilayered, which requires the same property profile of the same.
  • a creation of a particularly good suitability for a type of stress of the material is, however, naturally associated with a deterioration in the resistance of the same against other loads, so that for a high quality of service of a tool often several property characteristics should be at a high level, in other words, the performance characteristics of a tool
  • High performance tool steel components consistently have a hard phase portion of carbides and a matrix phase portion receiving them, which phases, particularly with respect to their proportions in the material, depend on the chemical composition of the alloy.
  • PM Powder metallurgical
  • production of materials essentially involves gas atomization or dicing of molten steel into fine droplets solidified to metal powder at a high rate of solidification, introduction and compression of the metal powder into a capsule Capping the capsule and heating and hot isostatic pressing (HIP) the powder in the capsule to a dense homogeneous material.
  • HIP hot isostatic pressing
  • Such PM material made can be used directly, as as-HIPed, for the manufacture of parts or tools or prior to hot working, e.g. by forging and / or rolling.
  • Highly stressed tools or parts e.g. Knives, punches and dies and the like require the same load resistance to abrasive wear, high toughness and fatigue resistance of the material.
  • Fatigue resistance which is essentially a failure to crack under very high swelling or alternating mechanical stress on the material, is again promoted by high matrix hardness and low crack initiation of carbide grains and non-metallic inclusions
  • the quality of use of parts or tools represents a compromise between wear resistance, toughness and fatigue resistance of the material in the thermally tempered state.
  • experts have long tried to increase the overall steel property profile.
  • the present invention is now the goal of the requirements To increase the mechanical characteristics in the thermally tempered state, namely the bending strength, the impact bending work and the wear resistance of the tool steel material quality assured at the same time.
  • the carbides should be essentially monocarbides with regard to wear resistance, distributed homogeneously in the matrix and be present with a diameter of less than 10 ⁇ m, preferably less than 4 ⁇ m.
  • Vanadium and niobium are the strongest carbide formers and, for alloying reasons, are to be provided together in a concentration range of 7.05 to 9.0% by weight V and 0.25 to 2.45% by weight Nb.
  • VNb advantageous mixed carbides
  • a formation of monocarbides and that of advantageous (VNb) mixed carbides is achieved, on the other hand is in these content ranges, founded by V and Nb, such a carbon affinity in the material, that the other carbide-forming elements chromium, tungsten and molybdenum in the inventive Concentrations with the residual carbon are available for solid solution strengthening and increase the matrix hardness.
  • the Pulverkomierenverander shall be procedurally adjusted such that at least 60% of the powder grains have a particle size of less than 100 microns (microns) in powder metallurgy production or in powder production.
  • a high solidification rate of the melt droplets associated with small metal powder particles has been found to provide a uniform distribution of fine monocarbides and a supersaturated base in the powder grain, in terms of carbon content.
  • the carbide morphology is controlled in terms of minimum defect size and the matrix composition in the direction of maximizing the secondary hardness potential, assuming the composition of the invention of the material. In this case, the importance of because again the intended niobium concentration of the regulated grain growth due to be mentioned.
  • a high-purity alloy is atomized by means of nitrogen with a purity of at least 99.999% nitrogen and a physisorption of oxygen at the powder surface is avoided until it is enclosed in a capsule, whereby the hipped material has an oxygen content of less than 100 ppm and a content and a configuration of non-metallic inclusions corresponding to a K0 value of at most 3 according to DIN 50 602 testing.
  • Table 1 shows the chemical composition of a cold work steel alloy according to the present invention (Leg. A) and those of the comparative alloys (B to J).
  • Table 2 shows the test results for transverse rupture strength, the impact bending work and the wear resistance of the alloy A according to the invention and of the comparative alloys B to J.
  • the pre-load F r was 200 N
  • the pre-load speed was 2 mm / min
  • the test speed was 5 mm / min.
  • the investigations of the impact bending work of the respective steel alloys were carried out.
  • the device for determining the wear resistance in a schematic representation can be removed.
  • the flexural strength of the alloy A according to the invention is compared with that of the comparative alloys (B to J) (Tab. 2), shown in a bar graph in FIG. 4, the alloys E, F, H and I each have uniformly high values. wherein the alloy I has the highest bending strength.
  • the alloy I has the highest value.
  • the measurement data of the alloy A according to the invention and the alloy F have slightly lower values for this mechanical property.

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

Claims (5)

  1. Part ou outil d'une haute ténacité et dureté ainsi que de résistance à l'usure et à la fatigue de matériau d'un acier d'écrouissage fabriqué selon la technique de la métallurgie des poudres, qui comprend en % en poids carbone (C) 2,05 à 2,65 silicium (Si) jusqu'à 2,0 manganèse (Mn) jusqu'à 2,0 chrome (Cr) 6,10 à 9,80 tungstène (W) 0,50 à 2,40 molybdène (Mo) 2,15 à 4,70 vanadium (V) 7,05 à 9,0 niobium (Nb) 0,25 à 2,45 cobalt (Co) jusqu'à 10,0 soufre (S) jusqu'à 0,3 nitrogène (N) 0,04 à 0,22 nickel (Ni) jusqu'à 1,50
    ainsi que des impuretés conditionnées par la fabrication, avec du fer (Fe) comme le reste, ledit part ayant un teneur en oxygène (O) plus petit que 100 ppm, et un teneur et une configuration des inclusions non-métalliques, qui correspondent à un valeur K0 de 3 en maximum selon un test correspondant à DIN 50 602, ainsi que des monocarbures également distribués d'une grosseur au-dessous de 10 µm.
  2. Part ou outil d'un acier d'écrouissage PM selon la revendication 1, qui possède un ou plusieurs élément(s) ayant le(s) valeur(s) de concentration suivant(s) en % en poids C 2.30 à 2.59 Si 0.80 à 1.50 Mn 0.30 à 1.40 Cr 6.12 à 7.50 Ni jusqu'à 1.0 W 0.60 à 1.45 Mo 2.40 à 4,40 V 7.40 à 8.70 Nb 0.50 jusqu'à 1.95 N 0.06 jusqu'à 0.22
    tandis que le valeur de (Mn-S) se monte à au moins 0,19.
  3. Part ou outil d'un acier d'écrouissage PM selon la revendication 1 ou 2, qui possède un ou plusieurs élément(s) ayant le(s) valeur(s) de concentration suivant(s) en % en poids Si 0.85 à 1.30 Mn 0.40 à 0.80 Cr 6.15 à 6.95 Ni jusqu'à 0.90 Mo 3.55 à 4.40 V 7.80 à 8.59 Nb 0.75 à 1.45 N 0.06 à 0.15
  4. Procédé de fabrication d'une part ou d'un outil selon la technique de la métallurgie des poudres à partir d'une acier d'écrouissage, qui comprend en % en poids (C) 2,05 à 2,65 (Si) jusqu'à 2,0 (Mn) jusqu'à 2,0 (Cr) 6,10 à 9,80 (W) 0,50 à 2,40 (Mo) 2,15 à 4,70 (V) 7,05 à 9,0 (Nb) 0,25 à 2,45 (Co) jusqu'à 10,0 (S) jusqu'à 0,3 (N) 0,04 à 0,22 (Ni) jusqu'à 1,50
    selon une quelconque des revendication précédentes, l'alliage liquide étant conditionné et atomisé avec du nitrogène d'un dégrée de pureté de 99,999 % à un poudre métallique d'une répartition granulométrique d'au moins 60 % d'une grosseur des particules d'égal à/plus petit de 100 micron (µm), après quoi on effectue un remplissage du poudre dans une capsule en maintenant l'atmosphère de nitrogène et en évitant une physisorption d'oxygène à la surface des grains, et on ferme celle-ci, et que le poudre est convertit à un matériau parfaitement dense dans une procédure de compression isostatique à haute température, le cas échéant avec un façonnage à chaud subséquente.
  5. Procédé selon la revendication 4, dans lequel on ajuste une croissance des monocarbures uniformément distribués à une grosseur au dessous de 10 µm au moyens d'une réglage de température lors d'un façonnage à chaud.
EP02450076A 2001-04-11 2002-04-04 Acier d'ecrouissage pour la fabrication des composants selon la technique de la metallurgie des poudres Expired - Lifetime EP1249512B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT02450076T ATE340877T1 (de) 2001-04-11 2002-04-04 Kaltarbeitsstahllegierung zur pulvermetallurgischen herstellung von teilen
SI200230445T SI1249512T1 (sl) 2001-04-11 2002-04-04 Jeklena legura za delo v hladnem za dele, izvedene na osnovi praskaste metalurgije

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT5872001 2001-04-11
AT0058701A AT410448B (de) 2001-04-11 2001-04-11 Kaltarbeitsstahllegierung zur pulvermetallurgischen herstellung von teilen

Publications (2)

Publication Number Publication Date
EP1249512A1 EP1249512A1 (fr) 2002-10-16
EP1249512B1 true EP1249512B1 (fr) 2006-09-27

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EP02450076A Expired - Lifetime EP1249512B1 (fr) 2001-04-11 2002-04-04 Acier d'ecrouissage pour la fabrication des composants selon la technique de la metallurgie des poudres

Country Status (15)

Country Link
US (1) US6773482B2 (fr)
EP (1) EP1249512B1 (fr)
KR (1) KR100476505B1 (fr)
CN (1) CN1164787C (fr)
AR (1) AR034306A1 (fr)
AT (1) AT410448B (fr)
BR (1) BR0202148B1 (fr)
CA (1) CA2381508C (fr)
DE (1) DE50208230D1 (fr)
DK (1) DK1249512T3 (fr)
ES (1) ES2272662T3 (fr)
HK (1) HK1051879A1 (fr)
RU (1) RU2221069C1 (fr)
TW (1) TW589388B (fr)
UA (1) UA76704C2 (fr)

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CN103157796B (zh) * 2013-04-10 2014-11-05 湖南环宇粉末冶金有限公司 一种粉末冶金工具钢的成型方法
CN103600062B (zh) * 2013-10-10 2016-01-13 铜陵新创流体科技有限公司 一种粉末冶金合金复合材料及其制备方法
CN103589960A (zh) * 2013-11-04 2014-02-19 虞伟财 一种电锯锯条用工具钢
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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
CN104878305B (zh) * 2015-05-15 2017-10-10 安泰科技股份有限公司 耐磨损耐腐蚀合金钢
CN104894483B (zh) * 2015-05-15 2018-07-31 安泰科技股份有限公司 粉末冶金耐磨工具钢
CN104894482B (zh) * 2015-05-15 2017-05-03 河冶科技股份有限公司 喷射成形工具钢
CN104874802B (zh) * 2015-05-15 2017-10-10 安泰科技股份有限公司 粉末冶金耐磨损耐腐蚀合金棒材
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CN104889400B (zh) * 2015-05-15 2017-10-10 安泰科技股份有限公司 粉末冶金耐磨耐蚀合金管材
CN105384008A (zh) * 2015-12-22 2016-03-09 常熟市复林造纸机械有限公司 一种卷纸机用高硬度滚筒
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Cited By (1)

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US9993858B2 (en) 2011-09-19 2018-06-12 Sandvik Intellectual Property Ab Roll for hot rolling

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US6773482B2 (en) 2004-08-10
ATA5872001A (de) 2002-09-15
HK1051879A1 (en) 2003-08-22
US20030068248A1 (en) 2003-04-10
DE50208230D1 (de) 2006-11-09
KR100476505B1 (ko) 2005-03-17
DK1249512T3 (da) 2007-02-05
UA76704C2 (uk) 2006-09-15
BR0202148A (pt) 2003-06-10
CA2381508C (fr) 2006-11-28
RU2221069C1 (ru) 2004-01-10
CN1164787C (zh) 2004-09-01
ES2272662T3 (es) 2007-05-01
KR20020080263A (ko) 2002-10-23
CN1382825A (zh) 2002-12-04
AR034306A1 (es) 2004-02-18
CA2381508A1 (fr) 2002-10-11
AT410448B (de) 2003-04-25
TW589388B (en) 2004-06-01
BR0202148B1 (pt) 2010-11-16
EP1249512A1 (fr) 2002-10-16

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