EP0648851B1 - Artikel aus Schwefel enthaltenden Werkzeugstahlpulver und Verfahren zu seiner Herstellung - Google Patents

Artikel aus Schwefel enthaltenden Werkzeugstahlpulver und Verfahren zu seiner Herstellung Download PDF

Info

Publication number
EP0648851B1
EP0648851B1 EP94306632A EP94306632A EP0648851B1 EP 0648851 B1 EP0648851 B1 EP 0648851B1 EP 94306632 A EP94306632 A EP 94306632A EP 94306632 A EP94306632 A EP 94306632A EP 0648851 B1 EP0648851 B1 EP 0648851B1
Authority
EP
European Patent Office
Prior art keywords
article
tool steel
sulphur
nitrogen
powder metallurgy
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.)
Revoked
Application number
EP94306632A
Other languages
English (en)
French (fr)
Other versions
EP0648851A1 (de
Inventor
William Stasko
Kenneth E. Pinnow
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.)
Crucible Materials Corp
Original Assignee
Crucible Materials Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22425515&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0648851(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Crucible Materials Corp filed Critical Crucible Materials Corp
Publication of EP0648851A1 publication Critical patent/EP0648851A1/de
Application granted granted Critical
Publication of EP0648851B1 publication Critical patent/EP0648851B1/de
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/00178—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices for active exercising, the apparatus being also usable for passive exercising
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/00181—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices comprising additional means assisting the user to overcome part of the resisting force, i.e. assisted-active exercising
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/40—Interfaces with the user related to strength training; Details thereof
    • A63B21/4041—Interfaces with the user related to strength training; Details thereof characterised by the movements of the interface
    • A63B21/4047—Pivoting movement
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/0002—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements involving an exercising of arms
    • A63B22/001—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements involving an exercising of arms by simultaneously exercising arms and legs, e.g. diagonally in anti-phase
    • A63B22/0012—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements involving an exercising of arms by simultaneously exercising arms and legs, e.g. diagonally in anti-phase the exercises for arms and legs being functionally independent
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/20—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements using rollers, wheels, castors or the like, e.g. gliding means, to be moved over the floor or other surface, e.g. guide tracks, during exercising
    • A63B22/201—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements using rollers, wheels, castors or the like, e.g. gliding means, to be moved over the floor or other surface, e.g. guide tracks, during exercising for moving a support element in reciprocating translation, i.e. for sliding back and forth on a guide track
    • A63B22/203—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements using rollers, wheels, castors or the like, e.g. gliding means, to be moved over the floor or other surface, e.g. guide tracks, during exercising for moving a support element in reciprocating translation, i.e. for sliding back and forth on a guide track in a horizontal plane
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B23/00—Exercising apparatus specially adapted for particular parts of the body
    • A63B23/035—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously
    • A63B23/04—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously for lower limbs
    • A63B23/0405—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously for lower limbs involving a bending of the knee and hip joints simultaneously
    • A63B23/0417—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously for lower limbs involving a bending of the knee and hip joints simultaneously with guided foot supports moving parallel to the body-symmetrical-plane by translation
    • 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
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/20—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements using rollers, wheels, castors or the like, e.g. gliding means, to be moved over the floor or other surface, e.g. guide tracks, during exercising
    • A63B22/201—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements using rollers, wheels, castors or the like, e.g. gliding means, to be moved over the floor or other surface, e.g. guide tracks, during exercising for moving a support element in reciprocating translation, i.e. for sliding back and forth on a guide track
    • A63B2022/206—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements using rollers, wheels, castors or the like, e.g. gliding means, to be moved over the floor or other surface, e.g. guide tracks, during exercising for moving a support element in reciprocating translation, i.e. for sliding back and forth on a guide track on a curved path
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/02—Games or sports accessories not covered in groups A63B1/00 - A63B69/00 for large-room or outdoor sporting games
    • A63B71/023—Supports, e.g. poles
    • A63B2071/025—Supports, e.g. poles on rollers or wheels
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
    • A63B21/005—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters
    • A63B21/0058—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using electromagnetic or electric force-resisters using motors
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/0015—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with an adjustable movement path of the support elements
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/0015—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with an adjustable movement path of the support elements
    • A63B22/0023—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with an adjustable movement path of the support elements the inclination of the main axis of the movement path being adjustable, e.g. the inclination of an endless band
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B23/00—Exercising apparatus specially adapted for particular parts of the body
    • A63B23/035—Exercising apparatus specially adapted for particular parts of the body for limbs, i.e. upper or lower limbs, e.g. simultaneously
    • A63B23/03575—Apparatus used for exercising upper and lower limbs simultaneously
    • 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
    • B22F2201/00—Treatment under specific atmosphere
    • B22F2201/02—Nitrogen
    • 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
    • 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

  • This invention relates to a tool steel article made of a hot worked powder metallurgy tool steel having higher than conventional sulfur content and a method for producing the same.
  • Tool steels are used conventionally in the manufacture of tooling articles employed in both cutting and noncutting tooling applications. This includes the manufacture of broaches and hobs, as well as of rolls, punches and mold components. In these tooling applications, it is necessary that the tool steel have sufficient strength, toughness, and wear resistance to withstand the service conditions encountered in these typical applications. In addition, they must have adequate machinability and grindability to facilitate production of the desired tooling components.
  • a more specific object of the invention is to provide a tool steel article made from a hot worked high sulfur containing powder metallurgy produced tool steel wherein the presence of sulfur and resulting sulfides does not significantly degrade toughness, as exhibited by the bend fracture strength.
  • the invention provides a machinable powder metallurgy produced sulphur containing tool steel article in accordance with claim 1 or claim 2 of the appended claims.
  • a machinable powder-metallurgy produced sulfur-containing tool steel article comprising a hot worked, fully dense, consolidated mass of nitrogen-gas atomized, prealloyed particles of a tool steel alloy having a sulfur content of 0.10 to 0.30 weight percent with a maximum sulfide size controlled to be less than about 15 microns.
  • the tool steel alloy of the hot worked article may have a composition of a wrought high speed tool steel or of a wrought cold work tool steel to which sulfur has been intentionally added within a range of 0.10 to 0.30 weight percent.
  • the tool steel of the hot worked article may have in weight percent 0.80 to 3.00 carbon, 0.20 to 2.00 manganese, 0.10 to 0.30 sulfur, up to 0.04 phosphorus, 0.20 to 1.50 silicon, 3.00 to 12.00 chromium, 0.25 to 10.00 vanadium, up to 11.00 molybdenum, up to 18.00 tungsten, up to 10.00 cobalt, up to 0.10 nitrogen, up to 0.025 oxygen, and balance iron and incidental impurities.
  • Tungsten may be substituted for molybdenum in the stoichiometric ratio of 2:1.
  • the machinable powder-metallurgy produced sulfur-containing tool steel article may have a minimum transverse bend fracture strength of 3450 MPa (500 ksi) when heat treated to a hardness of 64 to 66 HRC.
  • the article comprises a hot-worked, fully dense, consolidated mass of nitrogen gas atomized, prealloyed particles of a tool steel alloy of, in weight percent, 1.25 to 1.50 carbon, 0.20 to 1.00 manganese, 0.10 to 0.26 sulfur, up to 0.04 phosphorous, up to 1.00 silicon, 3.0 to 6.0 chromium, 4.0 to 6.0 molybdenum, 3.50 to 4.50 vanadium, 4.0 to 6.5 tungsten, up to 0.025 oxygen, up to 0.10 nitrogen and balance iron and incidental impurities.
  • the article has a maximum sulfide size controlled to be less than about 15 microns.
  • the sulfur content of the articles in accordance with the invention may be within the range of 0.14 to 0.26%.
  • the invention further provides a method for manufacturing a powder metallurgy sulfur containing tool steel article in accordance with Claim 4 or Claim 5 of the appended claims.
  • the invention includes a method for manufacturing a powder-metallurgy sulfur-containing tool steel article of a hot worked, fully dense, consolidated mass of nitrogen atomized, prealloyed particles of a tool steel alloy having a sulfur content of 0.10 to 0.30 weight percent with a maximum sulfide size controlled to be less than about 15 microns.
  • prealloyed particles are produced by nitrogen gas atomization and are hot isostatically compacted to full density at a temperature of 1185°C (2165°F) and a pressure of 1035 MPa (15 ksi). The resulting compact is hot worked to a desired article shape at a temperature of 1121°C (2050°F) and the article is then annealed.
  • the method in the invention may also be applied to prealloyed particles of a tool steel alloy of the composition, in weight percent, 0.80 to 3.00 carbon, 0.20 to 2.00 manganese, 0.10 to 0.30 sulfur, up to 0.04 phosphorous, 0.20 to 1.50 silicon, 3.0 to 12.0 chromium, 0.25 to 10.0 vanadium, up to 11.0 molybdenum, up to 18.0 tungsten, up to 10.0 cobalt, up to 0.10 nitrogen, up to 0.025 oxygen, balance iron and incidental impurities.
  • the method of the invention may likewise be used with prealloyed particles of a tool steel alloy of the composition, in weight percent, 1.25 to 1.50 carbon, 0.20 to 1.00 manganese, 0.10 to 0.26 sulfur, up to 0.04 phosphorous, up to 1.00 silicon, 3.0 to 6.0 chromium, 4.0 to 6.0 molybdenum, 3.50 to 4.50 vanadium, 4.0 to 6.5 tungsten, up to 0.025 oxygen, up to 0.10 nitrogen, balance iron and incidental impurities.
  • the sulfur content may be within the range of 0.14 to 0.26 weight percent.
  • the carbon present in the alloy combines with chromium, vanadium, molybdenum and tungsten to form the desired dispersion of wear resistant carbides and to promote secondary hardening. Sufficient carbon is also present to provide for strengthening of the matrix of the steel.
  • the sulfur present in the steel combines primarily with the manganese to produce manganese sulfides or manganese-rich sulfides which facilitate the machinability and grindability of the steel.
  • the high sulfur powder metallurgy produced tool steels used in their construction be hot worked after consolidation to achieve the high mechanical strength needed for tooling components. It is also essential that the production and processing conditions for the powder metallurgy produced tool steels used in the articles of this invention be controlled so that the sizes and distribution of the sulfides introduced by the sulfur additions do not significantly degrade mechanical properties. In the powder metallurgy produced tool steel used in the tool steel articles of this invention, this is achieved by maintaining the maximum size of the sulfides below about 15 ⁇ m in their longest dimension.
  • the production conditions for the experimental tool steels were designed to minimize the size of the sulfides in the microstructure. They were produced from nitrogen gas atomized prealloyed powders produced from 136 kg (300-pound) induction melted heats. About 91 kg (200 pounds) of powder from each heat were screened to -16 mesh (U.S. Standard) and loaded into 20 cm (8-inch) diameter, low carbon steel containers which were hot outgassed at 204°C (400°F) and then sealed by welding. The containers were then heated to 1185°C (2165°F) and isostatically compacted at this temperature for four hours at a pressure of 103.5 MPa (15 ksi) and then slowly cooled to ambient temperature. The resulting compacts were then heated to a temperature of 1121°C (2050°F), hot worked to 8 cm (3-inch) diameter bars, and finally annealed using a conventional high speed tool steel annealing cycle.
  • the commercial powder metallurgy tool steels were produced from -16 mesh nitrogen atomized powders and are representative of materials receiving different amounts of hot reduction after consolidation by hot isostatic pressing. No special measures were used in production of these steels to control sulfide size.
  • the results of the drill machinability tests conducted on the experimental tool steels in the annealed condition are given in Table V.
  • the drill machinability indexes in this table were obtained by comparing the times required to drill holes of the same size and depth in these steels and by multiplying the ratios of the times for each steel to that for the experimental steel with 0.005% sulfur by 100. Indexes greater than 100 indicate that the drill machinability of the steel being tested is greater than that of the experimental tool steel article containing 0.005% sulfur (Steel 91-60).
  • the results show that increasing sulfur from 0.005 to 0.26% improves machinability of the experimental tool steels and that the greater improvement is achieved at sulfur contents at or above about 0.14%.
  • sulfur containing tool steel article is restricted to cold work tool steels and high speed tool steels.

Landscapes

  • Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Biophysics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Vascular Medicine (AREA)
  • Cardiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Claims (6)

  1. Bearbeitbarer, pulvermetallurgisch hergestellter, Schwefel enthaltender Werkzeugstahlgegenstand, der eine heiß bearbeitete, völlig dichte, konsolidierte Masse aus mit gasförmigem Stickstoff zerstäubten, vorlegierten Teilchen einer Werkzeugstahllegierung umfaßt, wobei diese Werkzeugstahllegierung in Gewichtsprozent 0,80 bis 3,00 Kohlenstoff, 0,20 bis 2,00 Mangan, 0,10 bis 0,30 Schwefel, bis zu 0,04 Phosphor, 0,20 bis 1,50 Silizium, 3,0 bis 12,00 Chrom, 0,25 bis 10,00 Vanadium, bis zu 11,00 Molybdän, bis zu 18,00 Wolfram, bis zu 10,00 Kobalt, bis zu 0,10 Stickstoff, bis zu 0,025 Sauerstoff enthält, wobei der Rest von Eisen und zufälligen Verunreinigungen gebildet wird, dadurch gekennzeichnet, daß der Gegenstand eine maximale Sulfidgröße aufweist, die so gesteuert ist, daß sie weniger als 15 µm beträgt.
  2. Bearbeitbarer pulvermetallurgisch hergestellter, Schwefel enthaltender Werkzeugstahlgegenstand, der eine minimale Querbigungs-Bruchfestigkeit von 3450 MPa (500 ksi) besitzt, wenn er zur Erzielung einer Härte von 64 bis 66 HRC hitzebehandelt worden ist, wobei dieser Gegenstand eine heißbearbeitete, völlig dichte, konsolidierte Masse aus mit gasförmigem Stickstoff zerstäubten, vorlegierten Teilchen einer Werkzeugstahllegierung umfaßt, die in Gewichtsprozent 1,25 bis 1,50 Kohlenstoff, 0,20 bis 1,00 Mangan, 1,10 bis 0,26 Schwefel, bis zu 0,04 Phosphor, bis zu 1,00 Silizium, 3,0 bis 6,00 Chrom, 4,0 bis 6,0 Molybdän, 3,50 bis 4,50 Vanadium, 4,0 bis 6,5 Wolfram, bis zu 0,025 Sauerstoff, bis zu 0,10 Stickstoff umfaßt, wobei der Rest aus Eisen und zufälligen Verunreinigungen besteht, dadurch gekennzeichnet, daß der Gegenstand eine maximale Sulfidgröße besitzt, die so gesteuert ist, daß sie weniger als ungefähr 0,15 µm beträgt.
  3. Pulvermetallurgisch hergestellter, Schwefel enthaltender Lagerstahl Gegenstand nach Anspruch 1 oder 2, bei dem der Schwefelgehalt im Bereich von 0,14 Prozent bis 0,26 Prozent liegt.
  4. Verfahren zur Herstellung eines pulvermetallurgischen, Schwefel enthaltenden Werkzeugstahlgegenstandes, der eine heißbearbeitete, völlig dichte, konsolidierte Masse aus mit Stickstoff zerstäubten, vorlegierten Teilchen einer Werkzeugstahllegierung umfaßt, die in Gewichtsprozent 0,80 bis 3,00 Kohlenstoff, 0,20 bis 2,00 Mangan, 0,10 bis 0,30 Schwefel, bis zu 0,04 Phosphor, 0,20 bis 1,50 Silizium, 3 bis 12,00 Chrom, 0,25 bis 10,00 Vanadium, bis zu 11,00 Molybdän, bis zu 18,00 Wolfram, bis zu 10,00 Kobalt, bis zu 0,10 Stickstoff, bis zu 0,025 Sauerstoff umfaßt, wobei der Rest aus Eisen und zufälligen Verunreinigungen besteht, und wobei der Gegenstand eine maximale Sulfidgröße besitzt, die so gesteuert ist, daß sie weniger als ungefähr 15 µm beträgt, und wobei das Verfahren die Schritte umfaßt, daß die vorlegierten Teilchen durch Zerstäubung mit gasförmigem Stickstoff hergestellt werden, die vorlegierten Teilchen isostatisch bei einer Temperatur von 1185°C (2165°F) und einem Druck von 103,5 Mpa (15 ksi) heiß auf volle Dichte verdichtet werden, daß der sich ergebende verdichtete Körper bei einer Temperatur von 1121°C (2050°F) auf die gewünschte Form des Gegenstandes heiiß bearbeitet und der Gegenstand geglüht wird.
  5. Verfahren zur Herstellung eines pulvermetallurgischen, Schwefel enthaltenden Werkzeugstahlgegenstandes, der eine minimale Querbiegungs-Bruchfestigkeit von 3450 MPa (500 ksi) besitzt, wenn er zur Erzielung einer Härte von 64 bis 66 HRC hitzebehandelt worden ist, wobei dieser Gegenstand eine heißbearbeitete, völlig dichte, konsolidierte Masse von mit Stickstoff zerstäubten, vorlegierten Teilchen einer Werkzeugstahllegierung enthält, die in Gewichtsprozent 1,25 bis 1,50 Kohlenstoff, 0,20 bis 1,00 Mangan, 0,10 bis 0,26 Schwefel, bis zu 0,04 Phosphor, bis zu 1,00 Silizium, 3,0 bis 6,0 Chrom, 4,0 bis 6,0 Molybdän, 3,5 bis 4,50 Vanadium, 4,0 bis 6,5 Wolfram, bis zu 0,025 Sauerstoff, bis zu 0,10 Stickstoff enthält, wobei der Rest aus Eisen und zufälligen Verunreinigungen besteht, und wobei dieser Gegenstand eine maximale Sulfidgröße besitzt, die so gesteuert ist, daß sie kleiner als ungefähr 15 µm ist, und wobei das Verfahren die Schritte umfaßt, daß vorlegierte Teilchen durch Stickstoff-Gaszerstäubung hergestellt und die vorlegierten Teilchen bei einer Temperatur von 1185 °C (2165°F) und einem Druck von 103,5 MPa (15 ksi) auf volle Dichte verdichtet werden, daß der verdichtete Körper bei einer Temperatur von 1121°C (2050°F) heiß bearbeitet wird, um die gewünschte Form des Gegenstandes zur erzielen, und das der Gegenstand geglüht wird.
  6. Verfahren nach Anspruch 4 oder 5, bei dem der Schwefelgehalt in einem Bereich von 0,14 bis 0,26 Gewichtsprozent liegt.
EP94306632A 1993-09-27 1994-09-09 Artikel aus Schwefel enthaltenden Werkzeugstahlpulver und Verfahren zu seiner Herstellung Revoked EP0648851B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12656293A 1993-09-27 1993-09-27
US126562 1993-09-27

Publications (2)

Publication Number Publication Date
EP0648851A1 EP0648851A1 (de) 1995-04-19
EP0648851B1 true EP0648851B1 (de) 1999-07-14

Family

ID=22425515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94306632A Revoked EP0648851B1 (de) 1993-09-27 1994-09-09 Artikel aus Schwefel enthaltenden Werkzeugstahlpulver und Verfahren zu seiner Herstellung

Country Status (8)

Country Link
EP (1) EP0648851B1 (de)
JP (1) JPH07179908A (de)
AT (1) ATE182183T1 (de)
CA (1) CA2131652C (de)
DE (1) DE69419474T2 (de)
DK (1) DK0648851T3 (de)
ES (1) ES2135544T3 (de)
GR (1) GR3031225T3 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
SE508872C2 (sv) * 1997-03-11 1998-11-09 Erasteel Kloster Ab Pulvermetallurgiskt framställt stål för verktyg, verktyg framställt därav, förfarande för framställning av stål och verktyg samt användning av stålet
AT411580B (de) * 2001-04-11 2004-03-25 Boehler Edelstahl Verfahren zur pulvermetallurgischen herstellung von gegenständen
AT412000B (de) 2003-04-24 2004-08-26 Boehler Edelstahl Gmbh & Co Kg Kaltarbeitsstahl-gegenstand
GB0912669D0 (en) * 2009-07-21 2009-08-26 Skf Publ Ab Bearing steels

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3598567A (en) * 1968-07-01 1971-08-10 Nicholas J Grant Stainless steel powder product
JPS5817802B2 (ja) * 1980-03-03 1983-04-09 株式会社神戸製鋼所 粉末高速度鋼の熱間加工法
SE445715B (sv) * 1984-11-30 1986-07-14 Hoeganaes Ab Mangansulfidhaltig jernpulverblandning
JPS63149707A (ja) * 1986-12-15 1988-06-22 Fujitsu Ltd ロボツトの速度指令生成方法
JPH02232302A (ja) * 1989-03-04 1990-09-14 Daido Steel Co Ltd 粉末高合金鋼圧延材の製造方法
CH680137A5 (de) * 1989-12-22 1992-06-30 Htm Ag
JPH03247743A (ja) * 1990-02-26 1991-11-05 Kawasaki Steel Corp 耐食性、被削性および鏡面性に優れた焼結合金鋼およびその製造方法
JPH0480305A (ja) * 1990-07-24 1992-03-13 Daido Steel Co Ltd 粉末高速度鋼製品の製造方法
US5238482A (en) * 1991-05-22 1993-08-24 Crucible Materials Corporation Prealloyed high-vanadium, cold work tool steel particles and methods for producing the same

Also Published As

Publication number Publication date
DE69419474D1 (de) 1999-08-19
ES2135544T3 (es) 1999-11-01
CA2131652A1 (en) 1995-03-28
DE69419474T2 (de) 2000-03-16
EP0648851A1 (de) 1995-04-19
JPH07179908A (ja) 1995-07-18
ATE182183T1 (de) 1999-07-15
DK0648851T3 (da) 1999-11-29
GR3031225T3 (en) 1999-12-31
CA2131652C (en) 2004-06-01

Similar Documents

Publication Publication Date Title
EP0726332B1 (de) Pulvermelallurgischer Artikel aus Schwefel enthaltendem Werkzeugstahl
EP0875588B1 (de) Kaltarbeitswerkzeugstahlteilchen mit hoher Schlagfestigkeit aus Metallpulver und Verfahren zu seiner Herstellung
EP1049552B1 (de) Stahlpulver für die herstellung gesinterter produkte
US5447800A (en) Martensitic hot work tool steel die block article and method of manufacture
KR100500772B1 (ko) 합금 강, 합금 강으로 제조된 공구 그리고 합금 강 및 공구를 제조하기 위한 통합 방법
MX2009002383A (es) Aleacion de acero, soporte o pieza de soporte para herramienta de moldeo de plastico, preforma endurecida y tenaz para soporte o pieza de soporte, proceso para porducir una aleacion de acero.
US5435824A (en) Hot-isostatically-compacted martensitic mold and die block article and method of manufacture
EP1905858B1 (de) Kaltgearbeiteter Werkzeugartikel aus Stahl
US20030095886A1 (en) PM high-speed steel having high elevated-temperature strength
KR100909922B1 (ko) 냉간 가공 강
JP5045972B2 (ja) 粉末冶金で製造された高速度鋼
DE60002669T2 (de) Hochfester pulvermetallurgischer werkzeugstahl und daraus hergestellter gegenstand
EP0377307B1 (de) Schnellstahlpulver
EP0648851B1 (de) Artikel aus Schwefel enthaltenden Werkzeugstahlpulver und Verfahren zu seiner Herstellung
US6837945B1 (en) Steel cold work tool, its use and manufacturing
DE60126646T2 (de) Stahllegierung, halter und haltereinzelteile für kunststoff-formwerkzeuge und vergütete rohlinge für halter und haltereinzelteile
EP0378925A1 (de) Stahlpulver für Kaltarbeitswerkzeug
KR100316342B1 (ko) 분말야금 고속도공구강
EP0024217A1 (de) Verfahren zur Herstellung eines Presskörpers aus Metallpulver
DE4334062A1 (de) Verwendung eines Stahls für warmfeste Werkzeuge
JPH0978207A (ja) 高焼入性高硬度粉末高速度鋼
MXPA98002337A (en) Steel articles for work tools in cold pulvimetalurgicos resistant to wear have high impact hardness and method to paraprove me

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 19950407

17Q First examination report despatched

Effective date: 19970911

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

REF Corresponds to:

Ref document number: 182183

Country of ref document: AT

Date of ref document: 19990715

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69419474

Country of ref document: DE

Date of ref document: 19990819

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: PATENTANWAELTE SCHAAD, BALASS, MENZL & PARTNER AG

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2135544

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19990817

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: BOEHLER EDELSTAHL GMBH

Effective date: 20000413

Opponent name: UDDEHOLM TOOLING AKTIEBOLAG

Effective date: 20000413

Opponent name: ERASTEEL KLOSTER AKTIEBOLAG

Effective date: 20000413

NLR1 Nl: opposition has been filed with the epo

Opponent name: BOEHLER EDELSTAHL GMBH

Opponent name: UDDEHOLM TOOLING AKTIEBOLAG

Opponent name: ERASTEEL KLOSTER AKTIEBOLAG

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

R26 Opposition filed (corrected)

Opponent name: ERASTEEL KLOSTER AKTIEBOLAG * 20000413 UDDEHOLM TO

Effective date: 20000413

RDAH Patent revoked

Free format text: ORIGINAL CODE: EPIDOS REVO

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20010820

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20010821

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20010830

Year of fee payment: 8

NLR1 Nl: opposition has been filed with the epo

Opponent name: BOEHLER EDELSTAHL GMBH

Opponent name: UDDEHOLM TOOLING AKTIEBOLAG

Opponent name: ERASTEEL KLOSTER AKTIEBOLAG

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: MC

Payment date: 20010904

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 20010905

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010909

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20010914

Year of fee payment: 8

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAE Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOS REFNO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020819

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020820

Year of fee payment: 9

Ref country code: AT

Payment date: 20020820

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020821

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20020828

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020904

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020909

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20020926

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020930

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20020930

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020930

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20021009

Year of fee payment: 9

BERE Be: lapsed

Owner name: *CRUCIBLE MATERIALS CORP.

Effective date: 20020930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030404

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

27W Patent revoked

Effective date: 20030424

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 20030424

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO