EP0230576A1 - Acier allié pour outils à haute résistance à l'usure - Google Patents

Acier allié pour outils à haute résistance à l'usure Download PDF

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Publication number
EP0230576A1
EP0230576A1 EP86116867A EP86116867A EP0230576A1 EP 0230576 A1 EP0230576 A1 EP 0230576A1 EP 86116867 A EP86116867 A EP 86116867A EP 86116867 A EP86116867 A EP 86116867A EP 0230576 A1 EP0230576 A1 EP 0230576A1
Authority
EP
European Patent Office
Prior art keywords
weight
vanadium
steel
tool steel
nitrogen
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.)
Withdrawn
Application number
EP86116867A
Other languages
German (de)
English (en)
Inventor
Jerzy Dr. Ing. Krawiarz
Edmund Dr. Ing. Kaliszewski
Remigiusz Dr. Ing. Wozniak
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.)
Akademia Gomiczo Hutnicza
Original Assignee
Akademia Gomiczo Hutnicza
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 Akademia Gomiczo Hutnicza filed Critical Akademia Gomiczo Hutnicza
Publication of EP0230576A1 publication Critical patent/EP0230576A1/fr
Withdrawn legal-status Critical Current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
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium

Definitions

  • the subject matter of the invention is an alloyed tool steel with great wear resistance for use in the production of tools which are exposed to particularly heavy wear.
  • Tools that have to work under conditions of intensive wear and tear are made of hard metal or steels of the Ledeburitic class, such as high-speed steels and high-chromium steels that also contain a high carbon content.
  • the main disadvantage of the hard metal is the high manufacturing costs, the low toughness and the difficulties associated with the production of tools with larger dimensions.
  • the steels of the Ledeburitic class have a low flexibility for hot forming and a large one Tendency to carbide streak segregation, which reduces the toughness after plastic deformation and post-heat treatment.
  • a high-speed steel is known from Polish Patent No. 125 293, which contains 0.6-1.3% by weight carbon, up to 0.5% by weight manganese, up to 0.03% by weight phosphorus, up to 0.03% by weight sulfur, 3 , 0 - 5.0 wt% chromium, 0 - 18.0 wt% tungsten and 0 - 9.0 wt% molybdenum, with the interdependency of tungsten and molybdenum with the formula 7 ⁇ W + 1.9 Mo ⁇ 18 , until 0.4%, 1.0-3.0% vanadium, 0.5-3.0% silicon and 0.03-0.30% nitrogen is expressed and the rest consists of iron and the inevitable impurities.
  • a high-speed steel is known from DE-PS 2 758 330 which contains 0.07-1.7% by weight carbon, 0.01-0.08% by weight nitrogen, 0.02-1.5% by weight boron , 01 - 1.5 wt% silicon, 0.01 - 1.0 wt% manganese, 5.0 - 15.0 wt% cobalt, 3.0 - 7.0 wt% chromium, 13.0 - 20.0 %
  • molybdenum 0-10.0% by weight tungsten, 0-5.0% by weight vanadium, 0.02-2.0% by weight niobium and / or tantalum and iron in addition to 100%.
  • Also known from DE-PS 3 144 476 is a high-speed steel which, in its composition, contains carbon in an amount of 0.08-2.0% by weight, silicon in an amount of 0.5-3.0% by weight, aluminum in an amount of 0.5-3.0% by weight, chromium in an amount of 0.5-10.0% by weight, molybdenum in an amount of 0.5-10.0% by weight, tungsten in an amount of 0, 5-20.0% by weight, vanadium in an amount of 0.5-6.0% by weight, cobalt in an amount of 0 - 10% by weight and iron in the supplement contains up to 100%.
  • the aim of the invention is to find an alloyed tool steel which, with almost complete limitation of the formation of eutectic mixtures of the Ledeburit type, offers the possibility of regulating its wear resistance and grindability in a wide range.
  • the essence of the invention is that a steel 0.4 - 4.5 wt% carbon, 0 - 2.0 wt% manganese, 0 - 2.5 wt% silicon, 0 - 6.0 wt% chromium, 0 - 7.0% by weight tungsten, 0 - 4.0% by weight molybdenum, 0 - 10.0% by weight cobalt, vanadium, niobium and nitrogen and the rest form iron and unavoidable impurities, 1 - 21% by weight vanadium, 0 - 16 , 0% by weight titanium, 0 - 4.0% by weight niobium and 0.01 - 2.0% by weight nitrogen.
  • the structure of the steel according to the invention contains primary carbides of the MC type and carbonitrides of the MX type with regular forms, which do not form eutectics of the ledeburite type, in an amount of 6-50 percent by volume, and a maximum of 2 percent by volume of the ledeburitic eutectics.
  • the steel according to the invention is suitable for machining and for the production of tools for cold and hot forming.
  • the rest is made up of iron and the inevitable impurities.
  • the steel structure contains 12% by volume of undissolved, primary vanadium carbonitrates.
  • the steel has significantly greater wear resistance than the high-speed steel SW18, with almost the same grindability.
  • the tool steel contains: After casting, there is approximately 8.5 volume percent primary carbides of the MC type in the structure of this steel. The arrangement of these carbides after plastic deformation / hot deformation was very regular.
  • the hardness after soft annealing is 227 HV.
  • the hardening and tempering characteristics of this steel enable it to be used in both cold and hot working. If the steel is used for cold working and the required hardness is 58 - 60 HRC, it is hardened from 1173 K in the water and tempered at 473 K. The heat treatment ensures the necessary red glow hardness during hot working in the range from 873 - 923 K, which after hardening from 1553 K in oil and tempering at 843 K.
  • the steel with the chemical composition mentioned above was used for cutting tabs of bimetallic knives for paper cutting instead of the previously used steel with the average chemical basic composition: 1.20% C, 0.50% Cr, 1.2% W, 0.15% V
  • the use of the steel according to the invention makes it possible to extend the working time of these knives without dulling them from 4 to 8 hours, at the same time increasing the number of regrinding options for these knives by approximately 80%.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
EP86116867A 1985-12-06 1986-12-04 Acier allié pour outils à haute résistance à l'usure Withdrawn EP0230576A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL256701 1985-12-06
PL25670185A PL256701A1 (en) 1985-12-06 1985-12-06 Alloyed tool steel of high resistance to abrasive wear

Publications (1)

Publication Number Publication Date
EP0230576A1 true EP0230576A1 (fr) 1987-08-05

Family

ID=20029399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116867A Withdrawn EP0230576A1 (fr) 1985-12-06 1986-12-04 Acier allié pour outils à haute résistance à l'usure

Country Status (2)

Country Link
EP (1) EP0230576A1 (fr)
PL (1) PL256701A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4944268A (en) * 1988-11-17 1990-07-31 Robert Bosch Gmbh Apparatus for varying the position of a control device of an internal combustion engine
WO2007121542A1 (fr) * 2006-04-24 2007-11-01 Villares Metals S/A Acier à coupe rapide pour lames de scie
WO2014118310A1 (fr) 2013-02-01 2014-08-07 Duma-Bandzink Gmbh Acier allié pour galets, paliers et coussinets d'installations de galvanisation, galets, paliers ou coussinets ainsi fabriqués, ainsi que procédé de fabrication de ces galets, paliers ou coussinets
EP2975146A1 (fr) * 2014-07-16 2016-01-20 Uddeholms AB Acier d'outillage pour le travail à froid
CN114318135A (zh) * 2021-03-22 2022-04-12 武汉钜能科技有限责任公司 耐磨损高速钢

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012879A (en) * 1960-02-24 1961-12-12 Crucible Steel Co America Nitrogen containing tool steels

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012879A (en) * 1960-02-24 1961-12-12 Crucible Steel Co America Nitrogen containing tool steels

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4944268A (en) * 1988-11-17 1990-07-31 Robert Bosch Gmbh Apparatus for varying the position of a control device of an internal combustion engine
WO2007121542A1 (fr) * 2006-04-24 2007-11-01 Villares Metals S/A Acier à coupe rapide pour lames de scie
WO2014118310A1 (fr) 2013-02-01 2014-08-07 Duma-Bandzink Gmbh Acier allié pour galets, paliers et coussinets d'installations de galvanisation, galets, paliers ou coussinets ainsi fabriqués, ainsi que procédé de fabrication de ces galets, paliers ou coussinets
EP2975146A1 (fr) * 2014-07-16 2016-01-20 Uddeholms AB Acier d'outillage pour le travail à froid
EP3169821A4 (fr) * 2014-07-16 2017-06-28 Uddeholms AB Acier à outils écroui à froid
US10472705B2 (en) 2014-07-16 2019-11-12 Uddeholms Ab Cold work tool steel
CN114318135A (zh) * 2021-03-22 2022-04-12 武汉钜能科技有限责任公司 耐磨损高速钢

Also Published As

Publication number Publication date
PL256701A1 (en) 1987-09-21

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Inventor name: KALISZEWSKI, EDMUND, DR. ING.

Inventor name: KRAWIARZ, JERZY, DR. ING.

Inventor name: WOZNIAK, REMIGIUSZ, DR. ING.