EP0885313B1 - Schnellarbeitsstahl - Google Patents

Schnellarbeitsstahl Download PDF

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Publication number
EP0885313B1
EP0885313B1 EP97934581A EP97934581A EP0885313B1 EP 0885313 B1 EP0885313 B1 EP 0885313B1 EP 97934581 A EP97934581 A EP 97934581A EP 97934581 A EP97934581 A EP 97934581A EP 0885313 B1 EP0885313 B1 EP 0885313B1
Authority
EP
European Patent Office
Prior art keywords
steel
molybdenum
vanadium
carbon
chromium
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
EP97934581A
Other languages
English (en)
French (fr)
Other versions
EP0885313A1 (de
Inventor
Jacques Adrien
Bertrand Remi
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.)
Thyssen France SA
Original Assignee
Thyssen France SA
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 Thyssen France SA filed Critical Thyssen France SA
Publication of EP0885313A1 publication Critical patent/EP0885313A1/de
Application granted granted Critical
Publication of EP0885313B1 publication Critical patent/EP0885313B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C22C33/0285—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with Cr, Co, or Ni having a minimum content higher than 5%

Definitions

  • the object of the present invention is to produce a steel quick cut from metallurgy powders, extremely hard, which has a hardness Rockwell at scale "C" between 68 and 70 Rc.
  • This steel obtained from a pre-alloyed, agglomerated powder, is characterized in that the alloy has the following composition: Weight percentages Preferred range Wide fork Manganese 0.20-0.40 ⁇ 1% Silicon 0.20-0.40 ⁇ 1% Chromium 4.50-5 4.50-6.45% Molybdenum 4.50-5 4-6% Vanadium 6.10 - 6.50 6.10 - 6.50 Tungsten 18.20 - 18.70 18.20 - 18.70 Sulfur ⁇ 0.015% ⁇ 0.20% Phosphorus ⁇ 0.020% ⁇ 0.030% Oxygen ⁇ 100ppm ⁇ 100ppm Cobalt 5.40 - 6.20% 5 - 7% Nitrogen 0.050 - 0.080% 0.050 - 0.080% Aluminum ⁇ 0.015% ⁇ 0.020% Carbon 1.83 - 1.90% 1.80 - 1.95%
  • the remainder being iron plus the impurities characteristic of the practice of metal fabrication, said steel having a dispersion essentially composed of carbides of the MC vanadium type.
  • the steel according to the present invention exhibits remarkable toughness, due in large part to a remarkable distribution of primary carbides, associated with very good hot hardness.
  • exceptional toughness the family of steels of the present invention offers a particular aptitude for shaping tools: machinability, hardenability , moldability.
  • Document US-5403372 describes an alloy which has a similar composition but whose carbon content is between 2 and 2.5%. In contrast, in the alloy according to the invention, the carbon content is limited to 1.95%.
  • the stoichiometric relationship for the formation of vanadium carbide is 1% of vanadium for 0.20% of carbon.
  • the carbon content of the steel is balanced with its vanadium, chromium, molybdenum and tungsten contents to provide sufficient carbon and thus allow it to be heat treated so as to obtain a hardness of 66 Hrc.
  • the steel for shaping tools according to the invention has a combination of qualities: wear resistance, hot hardness, characterized by the Mathon cutting capacity test, toughness which could not be obtained until now.
  • the toughness is determined by a measurement according to the Charpy test designated in standard ASTM-23-92 and 23-93.
  • a 10x10x55mm reference test piece is treated at 1.160 ° C, oil shutdown or isothermal shutdown at 560 ° C followed by three one-hour tempers at 560 ° C; it then has a toughness greater than 40 J / cm 2 .
  • the cutting capacity is characterized by the MATHON test (defined in standard AFNOR A.03.654).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (2)

  1. Durch Pulvermetallurgie erzeugter Stahl, der, ausgehend von einem vorlegierten, agglomerierten und verdichteten Pulver hoher Reinheit, hergestellt ist, dadurch gekennzeichnet, daß der Stahl gewichtsmäßig die folgende Zusammensetzung aufweist: Mangan < 1 % Silizium < 1 % Chrom 4,50 - 6,45 % Molybdän 4 - 6 % Vanadium 6,10 - 6,50 % Wolfram 18,20 - 18,70 % Schwefel ≤ 0,020 % Phosphor ≤ 0,030 % Sauerstoff ≤ 100 ppm Kobalt 5 - 7 % Stickstoff 0,050 - 0,080 % Aluminium ≤ 0,020 % Kohlenstoff 1,80 - 1,95 % ,
    wobei der Rest Eisen zusammen mit den für die Praxis der Stahlherstellung charakteristischen Verunreinigungen ist, und daß der besagte Stahl eine Dispersion von vor allem Vanadium-Carbiden vom MC-Typ enthält.
  2. Stahl nach Anspruch 1, dadurch gekennzeichnet, daß die Legierung die folgende allgemeine Zusammensetzung aufweist: Mangan 0,20 - 0,40 % Silizium 0,20 - 0,40 % Chrome 4,50 - 5 % Molybdän 4,50-5 % Vanadium 6,10 - 6,50 % Wolfram 18,20 - 18,70 % Schwefel < 0,015 % Phosphor < 0,020 % Sauerstoff < 100 ppm Kobalt 5,40 - 6,20 % Stickstoff 0,050 - 0,080 % Aluminium < 0,015 % Kohlenstoff 1,83 - 1,90 %
EP97934581A 1996-07-19 1997-07-17 Schnellarbeitsstahl Expired - Lifetime EP0885313B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9609080 1996-07-19
FR9609080A FR2751348B1 (fr) 1996-07-19 1996-07-19 Acier pour outils de mise en forme
PCT/FR1997/001328 WO1998003692A1 (fr) 1996-07-19 1997-07-17 Acier a coupe rapide

Publications (2)

Publication Number Publication Date
EP0885313A1 EP0885313A1 (de) 1998-12-23
EP0885313B1 true EP0885313B1 (de) 2001-10-24

Family

ID=9494244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97934581A Expired - Lifetime EP0885313B1 (de) 1996-07-19 1997-07-17 Schnellarbeitsstahl

Country Status (13)

Country Link
US (1) US5969277A (de)
EP (1) EP0885313B1 (de)
KR (1) KR20000064245A (de)
AR (1) AR007934A1 (de)
AT (1) ATE207549T1 (de)
AU (1) AU727767B2 (de)
BR (1) BR9706600A (de)
CA (1) CA2230718A1 (de)
DE (1) DE69707651T2 (de)
ES (1) ES2166096T3 (de)
FR (1) FR2751348B1 (de)
PL (1) PL325556A1 (de)
WO (1) WO1998003692A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1151146B1 (de) 1999-01-29 2003-05-14 Crs Holdings, Inc. Hochfester pulvermetallurgischer werkzeugstahl und daraus hergestellter gegenstand

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB781083A (en) * 1954-10-01 1957-08-14 Gregory Jamieson Comstock Improvements relating to high speed tool forms and their production
US3150444A (en) * 1962-04-26 1964-09-29 Allegheny Ludlum Steel Method of producing alloy steel
US4080205A (en) * 1972-07-13 1978-03-21 Toyota Jidosha Kogyo Kabushiki Kaisha Sintered alloy having wear-resistance at high temperature
JP2725333B2 (ja) * 1988-12-27 1998-03-11 大同特殊鋼株式会社 粉末高速度工具鋼
US5403372A (en) * 1991-06-28 1995-04-04 Hitachi Metals, Ltd. Vane material, vane, and method of producing vane
SE500008C2 (sv) * 1991-08-07 1994-03-21 Erasteel Kloster Ab Snabbstål med god varmhårdhet och slitstyrka framställt av pulver

Also Published As

Publication number Publication date
KR20000064245A (ko) 2000-11-06
PL325556A1 (en) 1998-08-03
DE69707651D1 (de) 2001-11-29
BR9706600A (pt) 1999-07-20
CA2230718A1 (fr) 1998-01-29
EP0885313A1 (de) 1998-12-23
FR2751348A1 (fr) 1998-01-23
WO1998003692A1 (fr) 1998-01-29
ATE207549T1 (de) 2001-11-15
AU727767B2 (en) 2000-12-21
US5969277A (en) 1999-10-19
AR007934A1 (es) 1999-11-24
FR2751348B1 (fr) 1998-10-02
AU3773797A (en) 1998-02-10
DE69707651T2 (de) 2002-07-11
ES2166096T3 (es) 2002-04-01

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