EP0425471B1 - Kaltarbeitsstahl mit hoher Druckfestigkeit und Verwendung dieses Stahles - Google Patents
Kaltarbeitsstahl mit hoher Druckfestigkeit und Verwendung dieses Stahles Download PDFInfo
- Publication number
- EP0425471B1 EP0425471B1 EP90890280A EP90890280A EP0425471B1 EP 0425471 B1 EP0425471 B1 EP 0425471B1 EP 90890280 A EP90890280 A EP 90890280A EP 90890280 A EP90890280 A EP 90890280A EP 0425471 B1 EP0425471 B1 EP 0425471B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cold work
- work steel
- steel according
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims description 42
- 239000010959 steel Substances 0.000 title claims description 42
- 230000006835 compression Effects 0.000 title claims 2
- 238000007906 compression Methods 0.000 title claims 2
- 229910000822 Cold-work tool steel Inorganic materials 0.000 title description 2
- 239000000463 material Substances 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000005121 nitriding Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 238000005256 carbonitriding Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005255 carburizing Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 239000011651 chromium Substances 0.000 description 15
- 239000010955 niobium Substances 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 238000005496 tempering Methods 0.000 description 6
- 229910052758 niobium Inorganic materials 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- UNASZPQZIFZUSI-UHFFFAOYSA-N methylidyneniobium Chemical compound [Nb]#C UNASZPQZIFZUSI-UHFFFAOYSA-N 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- -1 niobium carbides Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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
- C22C38/18—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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
Definitions
- the invention relates to a cold work steel according to the preamble of claim 1 and the use of this steel for components and tools.
- Cold work tool steels are used to machine materials at temperatures below 250 ° C, especially at room temperatures. Such processing can be carried out by cutting or non-cutting, the components or tools being subjected to various stresses at the same time.
- the dominant stress (s) or desired property (s) of the part such as compressive strength, hardness, toughness, wear resistance, edge retention, possibly erodibility and the like is usually taken into account by a corresponding choice of the composition of the cold work steel.
- Cr steels with contents of 1.5 to 2.5% C and 10 ⁇ to 17% Cr such as steels according to DIN material no. 1.2379 or AISI type D 7 . Because of their high and coarse carbide content, which is usually arranged in rows, such steels have high wear resistance, but low toughness, so that it is difficult to bend Shear stresses can break or break out the part.
- EP-A1 0 ⁇ 275475 discloses a wear-resistant cold work steel with a very high impact strength, which is produced by a powder metallurgical process and which has a composition of essentially 1.0 vom to 2.5% by weight of C, 6.5 to 11.0 ⁇ % by weight. % Cr and 3.0 ⁇ to 7.0 ⁇ wt .-% V, balance iron.
- alloy with approximately 5% or approximately 8% Cr and a carbon content of approximately 1.0% or approximately 0.5% with additions of Mo, W and V, for example Steels according to DIN material no. 1.2363 or material no. 1.2362 as well as material no. 1.2345 or AISI type A2.
- a die steel with improved impact strength contains according to SU 1.0 ⁇ 73.321 (Chemical Abstracts 10 ⁇ 0 Ges: 178630 ⁇ j) in% by weight Nb 0 ⁇ , 0 ⁇ 5 to 0 ⁇ , 1, Al 0 ⁇ , 0 ⁇ 3 to 0 ⁇ , 0 ⁇ 8 and Ca 0 ⁇ , 0 ⁇ 0 ⁇ 3 to 0 ⁇ , 0 ⁇ 0 ⁇ 5 in a steel base with essentially C 0 ⁇ , 75 to 0 ⁇ , 85, Cr 4.2 to 4.7, Mo 0 ⁇ , 7 to 1.0 ⁇ , W 1.7 to 2 and V 0 ⁇ , 8 to 1.
- CH-A5 585 799 a super high-speed steel based on Mo with great chip removal with essentially in weight% 1.0 ⁇ 5 to 1.50 ⁇ C, 4.0 ⁇ to 5.0 ⁇ Cr, 5.0 ⁇ to 6.0 ⁇ W known, which in addition to iron also has 6.0 ⁇ 5 to 6.95 Mo, 2.16 to 4.5 V, 0 ⁇ , 1 to 4.0 ⁇ Nb and 0 ⁇ , 11 to 0 ⁇ , 25 N.
- the alloy variants those with Cr contents of 10 ⁇ to 17% and those with 5 to 8% Cr, also have the disadvantage that they are usually not sufficiently resistant to tempering, and that with additional surface hardening by nitriding and / or carbonitriding or one Surface coating by means of CVD or PVD processes at temperatures between 350 ⁇ and 60 ⁇ 0 ⁇ ° C the hardness of the base material achieved by previous tempering is reduced.
- the invention has for its object to use the effect of alloying elements in a certain concentration range synergistically and to create a cold work steel with high compressive strength, which has high hardness, toughness, wear resistance and erodability, with good cutting and punching tools formed from this steel Grindability and edge retention are present and, if applicable, when using methods for surface hardening and / or surface coating, which are to be carried out at elevated temperature, there is no decisive disadvantageous influence on the mechanical properties of the base material achieved by prior hardening.
- the concentrations of the carbon content and the nitrogen content and the elements which preferably form carbides and / or nitrides are matched to one another in accordance with the carbon and nitrogen affinity and tendency to form carbide and / or nitride.
- Excessively high carbon contents of over 1.5% result in proportionately large, even coarse carbide grains and thus poor toughness properties of the material, with contents below 0 ⁇ .6% the required mechanical properties, in particular the hardness, are not achieved.
- Chromium, molybdenum, tungsten and vanadium are alloyed for the formation of carbide, whereby according to the invention the respective concentration of these elements takes into account the interaction or the mutual influence 50 ⁇ 0 ⁇ ° C are excreted sub-microscopically, cause high hardness or a quasi increase in secondary hardness and cause a high degree of temper resistance of the steel.
- Aluminum and silicon, which elements make up the ⁇ region severely pinching off the alloy are necessary for several reasons. Surprisingly, the tempering behavior of the steel and its tempering resistance are significantly improved by these ferrite-forming elements in the concentration ranges claimed.
- nitride formation takes place with a corresponding nitrogen content of the alloy, which nitrides hinder grain growth during hardening or during austenitizing at high temperatures.
- Aluminum and silicon are advantageously effective for surface hardening by nitriding or carbonitriding and / or surface coating by means of a CVD or PVD or the like method.
- Niobium is a very strongly carbide-forming element, and even finely separated niobium carbides are difficult to dissolve during hardening, even at high austenitizing temperatures.
- high niobium contents at carbon concentrations of cold work steels lead to coarse niobium carbide grains, so that niobium is only added up to a maximum concentration of 0.5%.
- the steels according to DIN material no. 1.2363 and material no. 1.2379 have a permissible specific pressure load of 2785 N / mm or 30 ⁇ 26 N / mm2 as well as a tempering hardness at 550 ° C of 56 HRC or 60 ° HRC .
- the cold work steel according to the invention has at least a permissible specific compressive strength of 30-22 N / mm2, a tempering hardness of 63.5 HRC and compared to material no. 1.2379 a toughness improved by 28%.
- the punch and die of steel A had a hardness of 63 HRC, and 64,629 punchings could be carried out. Despite an only slightly lower hardness of 62 HRC of steel D, only 20,751 punchings could be carried out, which corresponds to an additional output of the tool according to the invention by approx. 30%.
- a steel B with the composition in% by weight was used for extrusion dies for pressing aluminum video heads.
- the surface of the tool made of steel B was enriched with nitrogen in a bath nitriding process at approx. 570 ° C, after which the hardness of the base material was 63.5 HRC. 40 horr7,320 ⁇ pressings were carried out with this tool without excessive wear, whereas the steel D tool had to be eliminated after 239,865 pressings.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Heat Treatment Of Steel (AREA)
- Physical Vapour Deposition (AREA)
- Chemical Vapour Deposition (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT2423/89 | 1989-10-23 | ||
AT2423/89A AT393387B (de) | 1989-10-23 | 1989-10-23 | Kaltarbeitsstahl mit hoher druckfestigkeit und verwendung dieses stahles |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0425471A1 EP0425471A1 (de) | 1991-05-02 |
EP0425471B1 true EP0425471B1 (de) | 1994-12-14 |
Family
ID=3534087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90890280A Expired - Lifetime EP0425471B1 (de) | 1989-10-23 | 1990-10-12 | Kaltarbeitsstahl mit hoher Druckfestigkeit und Verwendung dieses Stahles |
Country Status (12)
Country | Link |
---|---|
US (1) | US5160553A (da) |
EP (1) | EP0425471B1 (da) |
JP (1) | JP2794641B2 (da) |
KR (1) | KR0170386B1 (da) |
AT (1) | AT393387B (da) |
AU (1) | AU631690B2 (da) |
BR (1) | BR9005350A (da) |
DE (1) | DE59008009D1 (da) |
DK (1) | DK0425471T3 (da) |
ES (1) | ES2068379T3 (da) |
TW (1) | TW199910B (da) |
ZA (1) | ZA908467B (da) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5445685A (en) * | 1993-05-17 | 1995-08-29 | The Regents Of The University Of California | Transformation process for production of ultrahigh carbon steels and new alloys |
GB2280865A (en) * | 1993-08-13 | 1995-02-15 | Mono Pumps Ltd | Flexible drive shaft |
AT403058B (de) * | 1995-03-23 | 1997-11-25 | Boehler Edelstahl | Eisenbasislegierung zur verwendung bei erhöhter temperatur und werkzeug aus dieser legierung |
FR2759092B1 (fr) * | 1997-02-04 | 1999-04-16 | Thyssen France Sa | Acier pour le formage a froid |
JP3284092B2 (ja) * | 1997-12-05 | 2002-05-20 | 理研ダイヤモンド工業株式会社 | 切断破砕用カッター |
SE511747C2 (sv) * | 1998-03-27 | 1999-11-15 | Uddeholm Tooling Ab | Kallarbetsstål |
US6093303A (en) | 1998-08-12 | 2000-07-25 | Swagelok Company | Low temperature case hardening processes |
JP4144094B2 (ja) * | 1999-01-28 | 2008-09-03 | 日立金属株式会社 | メタルバンドソー用刃材 |
AT407648B (de) * | 1999-05-10 | 2001-05-25 | Boehler Edelstahl | Metallischer werkstoff mit hoher härte, hohem verschleisswiderstand und hoher zähigkeit |
AT410448B (de) * | 2001-04-11 | 2003-04-25 | Boehler Edelstahl | Kaltarbeitsstahllegierung zur pulvermetallurgischen herstellung von teilen |
US20030155045A1 (en) * | 2002-02-05 | 2003-08-21 | Williams Peter C. | Lubricated low temperature carburized stainless steel parts |
US6723182B1 (en) * | 2002-11-14 | 2004-04-20 | Arthur J. Bahmiller | Martensitic alloy steels having intermetallic compounds and precipitates as a substitute for cobalt |
AT500728B8 (de) | 2005-02-21 | 2007-02-15 | Boehler Edelstahl | Schneidwerkzeug |
WO2008066438A1 (en) * | 2006-11-27 | 2008-06-05 | E2 Forestry Hb | Wear resistant tool for wood chipping |
AT507215B1 (de) * | 2009-01-14 | 2010-03-15 | Boehler Edelstahl Gmbh & Co Kg | Verschleissbeständiger werkstoff |
AT508591B1 (de) * | 2009-03-12 | 2011-04-15 | Boehler Edelstahl Gmbh & Co Kg | Kaltarbeitsstahl-gegenstand |
KR101599721B1 (ko) | 2014-02-27 | 2016-03-04 | 김종선 | 원적외선 코팅층을 구비한 전기온돌판넬 |
CN105526437A (zh) * | 2016-02-15 | 2016-04-27 | 海安欣凯富机械科技有限公司 | 金属软管 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE739958C (de) * | 1937-04-30 | 1943-10-08 | Sandvikens Jernverks Ab | Stahllegierung fuer durch Walzen oder aehnliche Verarbeitungsverfahren hergestellte korrosionsbestaendige, gehaertete Schneidwerkzeuge |
CH585799A5 (en) * | 1971-12-29 | 1977-03-15 | Lenin Kohaszati Muvek | High speed steel based on molybdenum - with good cutting props dependent on vanadium and niobium content |
US4224060A (en) * | 1977-12-29 | 1980-09-23 | Acos Villares S.A. | Hard alloys |
JPS60427B2 (ja) * | 1979-05-17 | 1985-01-08 | 大同特殊鋼株式会社 | 冷間鍛造性のすぐれた快削鋼 |
US4264380A (en) * | 1979-11-16 | 1981-04-28 | General Electric Company | Nitride casehardening process and the nitrided product thereof |
JPH0765141B2 (ja) * | 1985-09-18 | 1995-07-12 | 日立金属株式会社 | 熱間加工用工具鋼 |
SE457356C (sv) * | 1986-12-30 | 1989-10-31 | Uddeholm Tooling Ab | Verktygsstaal avsett foer kallbearbetning |
DE3851982T2 (de) * | 1987-06-11 | 1995-03-09 | Aichi Steel Works Ltd | Stahl mit hoher Abnutzungsbeständigkeit. |
JP2756451B2 (ja) * | 1987-07-29 | 1998-05-25 | 大同特殊鋼株式会社 | 冷間工具鋼の製造方法 |
JPH076663B2 (ja) * | 1988-01-11 | 1995-01-30 | ダイキン工業株式会社 | 空気調和装置 |
-
1989
- 1989-10-23 AT AT2423/89A patent/AT393387B/de not_active IP Right Cessation
-
1990
- 1990-09-13 TW TW079107707A patent/TW199910B/zh active
- 1990-10-12 DK DK90890280.2T patent/DK0425471T3/da not_active Application Discontinuation
- 1990-10-12 EP EP90890280A patent/EP0425471B1/de not_active Expired - Lifetime
- 1990-10-12 DE DE59008009T patent/DE59008009D1/de not_active Expired - Lifetime
- 1990-10-12 ES ES90890280T patent/ES2068379T3/es not_active Expired - Lifetime
- 1990-10-12 JP JP2272524A patent/JP2794641B2/ja not_active Expired - Lifetime
- 1990-10-23 AU AU64922/90A patent/AU631690B2/en not_active Ceased
- 1990-10-23 ZA ZA908467A patent/ZA908467B/xx unknown
- 1990-10-23 US US07/601,676 patent/US5160553A/en not_active Expired - Lifetime
- 1990-10-23 BR BR909005350A patent/BR9005350A/pt not_active IP Right Cessation
- 1990-10-23 KR KR1019900016926A patent/KR0170386B1/ko not_active IP Right Cessation
Non-Patent Citations (4)
Title |
---|
E.Houdremont, Handbuch der Sonderstahlkunde, Springer-Verlag, 1956, Seiten 1200-1219 * |
F.Rapatz, Die Edelstähle, Springer-Verlag, 1962, Seiten 56-61, 270-273 * |
Stahl Eisen Liste, Verein deutscher Eisenhüttenleute, 8. Auflage, Seiten 65, 66, 255-257 * |
Stahlschlüssel, Verlag Stahlschlüssel Wegst GmbH, 1983, Seiten 4, 179, 181 * |
Also Published As
Publication number | Publication date |
---|---|
US5160553A (en) | 1992-11-03 |
JP2794641B2 (ja) | 1998-09-10 |
ATA242389A (de) | 1991-03-15 |
JPH03197649A (ja) | 1991-08-29 |
BR9005350A (pt) | 1991-09-17 |
ZA908467B (en) | 1991-12-24 |
KR0170386B1 (ko) | 1999-02-18 |
DK0425471T3 (da) | 1995-02-20 |
AU6492290A (en) | 1991-04-26 |
AT393387B (de) | 1991-10-10 |
EP0425471A1 (de) | 1991-05-02 |
AU631690B2 (en) | 1992-12-03 |
KR910008158A (ko) | 1991-05-30 |
TW199910B (da) | 1993-02-11 |
DE59008009D1 (de) | 1995-01-26 |
ES2068379T3 (es) | 1995-04-16 |
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