EP2886673B1 - Verfahren zur Herstellung von Gegenständen aus Eisen-Cobalt-Molybdän/Wolfram-Stickstoff-Legierungen - Google Patents

Verfahren zur Herstellung von Gegenständen aus Eisen-Cobalt-Molybdän/Wolfram-Stickstoff-Legierungen Download PDF

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Publication number
EP2886673B1
EP2886673B1 EP14192704.6A EP14192704A EP2886673B1 EP 2886673 B1 EP2886673 B1 EP 2886673B1 EP 14192704 A EP14192704 A EP 14192704A EP 2886673 B1 EP2886673 B1 EP 2886673B1
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EP
European Patent Office
Prior art keywords
mpa
hrc
annealing
molybdenum
tungsten
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.)
Active
Application number
EP14192704.6A
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German (de)
English (en)
French (fr)
Other versions
EP2886673A3 (de
EP2886673A2 (de
Inventor
Gert Kellezi
Robert Tanzer
Christoph Turk
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.)
Voestalpine Boehler Edelstahl GmbH and Co KG
Original Assignee
Boehler Edelstahl GmbH and Co KG
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 Boehler Edelstahl GmbH and Co KG filed Critical Boehler Edelstahl GmbH and Co KG
Priority to SI201431345T priority Critical patent/SI2886673T1/sl
Publication of EP2886673A2 publication Critical patent/EP2886673A2/de
Publication of EP2886673A3 publication Critical patent/EP2886673A3/de
Application granted granted Critical
Publication of EP2886673B1 publication Critical patent/EP2886673B1/de
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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/007—Heat treatment of ferrous alloys containing Co
    • 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%
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • B22F2003/248—Thermal after-treatment
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/02—Hardening by precipitation

Definitions

  • Precipitation-hardenable iron-cobalt-molybdenum and / or tungsten-nitrogen alloy tools or articles having a chemical composition in% by weight Cobalt (Co) 15.0 to 30.0 Molybdenum (Mo) to 20.0 Tungsten (W) to 25.0 Molybdenum + 0.5 tungsten (Mo + W / 2) 10.0 to 22.0 Nitrogen (N) 0.005 to 12:12
  • Iron (Fe) and production-related impurities as the remainder are known and for example in the AT 505 221 B1 revealed.
  • a production of the semifinished product takes place in an advantageous manner via powder metallurgical (PM) processes, whereby a homogeneous material structure can be achieved.
  • PM powder metallurgical
  • the process for producing articles involves hot-working the HIP block followed by cooling, after which the Fe-Co-Mo / W-N material has a hardness of mostly 48 to 53 HRC, is extremely brittle and does not allow machining.
  • a thermal finish of the part made of the semifinished product is usually carried out by a heat treatment with a solution annealing, followed by quenching and tempering, wherein a hardness of the material of optionally 68 HRC can be achieved.
  • An article, part or tool made of an Fe-Co-Mo / W-N alloy has best performance properties for a variety of special requirements, but requires a complicated manufacturing process due to the material.
  • the invention is now based on the object to provide a semi-finished product made of an alloy having an aforementioned composition, from which high-precision objects or tools can be manufactured with reduced effort.
  • the material has a tensile strength Rm of less than 1220 MPa and a yield strength R P0.2 of less than 825 MPa.
  • a semifinished product made according to the invention has the advantage of significantly improved machinability.
  • the material hardness which is usually in the range above 41 HRC, lowered to significantly below 40 HRC in the material according to the invention, which facilitates machining
  • the material brittleness is reduced and the toughness and deformability in the cold state improved, which is a straightening of the semifinished product within limits.
  • a material produced according to the invention has a significantly reduced order structure of the Fe and Co atoms in the matrix and so low plasticity of the same, despite high phase content allows, which is achieved by the achieved mechanical Material values is disclosed.
  • the object of the invention is achieved with a method for producing a semifinished product mentioned by means of a special thermal treatment for dissolving an ordering structure of Fe-Co atoms in the matrix, wherein a heating and a Annealing of the part or material at a temperature between 600 ° C and 840 ° C takes place with a period of greater than 20 min, after which the semifinished product is subjected to cooling with a cooling rate ⁇ of less than 3 and thus a reduction or adjustment of a hardness below 40 HRC with an improved material toughness, measured on the impact bending work of unnotched samples K of greater than 16.0 J of the material.
  • a thermal hardening by solution annealing, followed by quenching and tempering of the article is largely feasible distortion-free, with a desired hardness of the material of 68 HRC, if necessary.
  • a micrograph of the sample shows Fig. 1 , where the matrix can be recognized as a dark area in which intermetallic phases (light) are embedded.
  • the same treated samples was a special thermal treatment at temperatures of 500 to 950 ° C at an annealing time or holding time to a temperature of 40 min and a cooling rate ⁇ of less than 0.4.
  • Fig. 2 Range 1 shows, hardness values of the material of 42 HRC.
  • Higher annealing temperatures up to 850 ° C, as from area 2 and area 3 of Fig. 2
  • reduce the material hardness to values up to 38 HRC with a further increase in the annealing temperature (range 4) causes a significant increase in hardness to about 44 HRC.
  • the diffraction of neutron rays at the periodic lattice can be used.
  • a periodic arrangement of atoms in the Fe-Co lattice leads to so-called superstructural reflections.
  • the superstructure is the (100) reflection in the ordered B2 lattice.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
EP14192704.6A 2013-12-12 2014-11-11 Verfahren zur Herstellung von Gegenständen aus Eisen-Cobalt-Molybdän/Wolfram-Stickstoff-Legierungen Active EP2886673B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201431345T SI2886673T1 (sl) 2013-12-12 2014-11-11 Metoda za proizvodnjo objektov iz železo-kobalt-molibden/volfram-dušikovih zlitin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50820/2013A AT515148B1 (de) 2013-12-12 2013-12-12 Verfahren zur Herstellung von Gegenständen aus Eisen-Cobalt-Molybdän/Wolfram-Stickstoff-Legierungen

Publications (3)

Publication Number Publication Date
EP2886673A2 EP2886673A2 (de) 2015-06-24
EP2886673A3 EP2886673A3 (de) 2015-08-05
EP2886673B1 true EP2886673B1 (de) 2019-06-12

Family

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EP14192704.6A Active EP2886673B1 (de) 2013-12-12 2014-11-11 Verfahren zur Herstellung von Gegenständen aus Eisen-Cobalt-Molybdän/Wolfram-Stickstoff-Legierungen

Country Status (13)

Country Link
US (1) US10066279B2 (sl)
EP (1) EP2886673B1 (sl)
JP (1) JP6071984B2 (sl)
KR (1) KR101700680B1 (sl)
CN (1) CN104708005B (sl)
AT (1) AT515148B1 (sl)
CA (1) CA2873761C (sl)
ES (1) ES2745380T3 (sl)
HK (1) HK1206681A1 (sl)
RU (1) RU2599926C2 (sl)
SI (1) SI2886673T1 (sl)
TW (1) TWI537399B (sl)
UA (1) UA113548C2 (sl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT515148B1 (de) 2013-12-12 2016-11-15 Böhler Edelstahl GmbH & Co KG Verfahren zur Herstellung von Gegenständen aus Eisen-Cobalt-Molybdän/Wolfram-Stickstoff-Legierungen
CN116837272B (zh) * 2021-11-29 2024-07-12 河冶科技股份有限公司 喷射成形耐腐蚀沉淀硬化高速钢
CN116837273B (zh) * 2021-11-29 2024-07-12 河冶科技股份有限公司 喷射成形沉淀硬化高速钢
CN116516262A (zh) * 2023-03-27 2023-08-01 中机新材料研究院(郑州)有限公司 一种高速干切齿轮刀具用粉末冶金材料及其制备方法

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Also Published As

Publication number Publication date
CA2873761A1 (en) 2015-06-12
TW201522662A (zh) 2015-06-16
EP2886673A3 (de) 2015-08-05
RU2599926C2 (ru) 2016-10-20
EP2886673A2 (de) 2015-06-24
TWI537399B (zh) 2016-06-11
CN104708005A (zh) 2015-06-17
HK1206681A1 (en) 2016-01-15
KR101700680B1 (ko) 2017-01-31
ES2745380T3 (es) 2020-03-02
US20150167132A1 (en) 2015-06-18
UA113548C2 (xx) 2017-02-10
CA2873761C (en) 2019-03-19
US10066279B2 (en) 2018-09-04
SI2886673T1 (sl) 2020-07-31
JP6071984B2 (ja) 2017-02-01
JP2015113528A (ja) 2015-06-22
CN104708005B (zh) 2017-10-03
AT515148A1 (de) 2015-06-15
RU2014150364A (ru) 2016-07-10
KR20150068912A (ko) 2015-06-22
AT515148B1 (de) 2016-11-15

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