EP0885313B1 - Schnellarbeitsstahl - Google Patents
Schnellarbeitsstahl Download PDFInfo
- 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
Links
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)
- 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 % , - 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 %
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)
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)
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 |
-
1996
- 1996-07-19 FR FR9609080A patent/FR2751348B1/fr not_active Expired - Fee Related
-
1997
- 1997-07-17 ES ES97934581T patent/ES2166096T3/es not_active Expired - Lifetime
- 1997-07-17 KR KR1019980701979A patent/KR20000064245A/ko not_active Application Discontinuation
- 1997-07-17 CA CA002230718A patent/CA2230718A1/fr not_active Abandoned
- 1997-07-17 EP EP97934581A patent/EP0885313B1/de not_active Expired - Lifetime
- 1997-07-17 PL PL97325556A patent/PL325556A1/xx unknown
- 1997-07-17 BR BR9706600A patent/BR9706600A/pt not_active Application Discontinuation
- 1997-07-17 AU AU37737/97A patent/AU727767B2/en not_active Ceased
- 1997-07-17 DE DE69707651T patent/DE69707651T2/de not_active Expired - Fee Related
- 1997-07-17 WO PCT/FR1997/001328 patent/WO1998003692A1/fr not_active Application Discontinuation
- 1997-07-17 AT AT97934581T patent/ATE207549T1/de not_active IP Right Cessation
- 1997-07-17 US US09/043,432 patent/US5969277A/en not_active Expired - Fee Related
- 1997-07-18 AR ARP970103250A patent/AR007934A1/es unknown
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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