EP1218555A1 - Procede pour produire in situ un materiau composite resistant a l'usure, selon la technique de la metallurgie des poudres - Google Patents

Procede pour produire in situ un materiau composite resistant a l'usure, selon la technique de la metallurgie des poudres

Info

Publication number
EP1218555A1
EP1218555A1 EP00964181A EP00964181A EP1218555A1 EP 1218555 A1 EP1218555 A1 EP 1218555A1 EP 00964181 A EP00964181 A EP 00964181A EP 00964181 A EP00964181 A EP 00964181A EP 1218555 A1 EP1218555 A1 EP 1218555A1
Authority
EP
European Patent Office
Prior art keywords
powder
particles
carbon
ferrotitanium
metal matrix
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.)
Granted
Application number
EP00964181A
Other languages
German (de)
English (en)
Other versions
EP1218555B1 (fr
Inventor
Hans Berns
Birgit Wewers
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.)
Maschinenfabrik Koeppern GmbH and Co KG
Original Assignee
Maschinenfabrik Koeppern 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 Maschinenfabrik Koeppern GmbH and Co KG filed Critical Maschinenfabrik Koeppern GmbH and Co KG
Publication of EP1218555A1 publication Critical patent/EP1218555A1/fr
Application granted granted Critical
Publication of EP1218555B1 publication Critical patent/EP1218555B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • C22C33/0207—Using a mixture of prealloyed powders or a master alloy

Definitions

  • HT hard particles
  • AT abrasive particles
  • the effectiveness of HT is optimal if it (a) is harder than the attacking ones AT, (b) larger than the furrow cross section, (c) dispersed in the metal matrix (MM) and (d) firmly connected to the MM IM
  • a dispersion of the HT means that they are arranged at a medium distance from each other in the MM and consequently do not touch each other. This leads to the shortest average grooving length in the matrix and to the greatest fracture toughness of the composite material. Setting a dispersion is not trivial and depends on the volume and diameter ratio of the HT and MM powders IM
  • the bond between HT and MM is formed by interdiffusion during hot compacting. It is generally stronger for HT made of metal / metalloid compounds than eg for metal oxides. B, C and N are used as metalloids, some are used as metals the subgroups of the 4 to 6 period, with titanium being of particular interest because of its availability and because of the high stability and hardness of its metalloid compounds.
  • the requirements (a) to (d) can only be met together with a metal matrix-particle composite.
  • Ferro alloys are used to alloy steel. In order to reduce the refining costs, an iron content remains in the ferro alloys, which is why they are not only inexpensive, but also brittle after solidification and can be comminuted to a desired powder grain size.
  • carbide particles TiC, NbC, VC
  • the external shape and size as well as the distribution of the carbide particles in the MM corresponds to that of the ferroalloy particles. Local melting can occur in the core of the carbide particles formed in situ tongues occur
  • the carbon required for carbide formation is not mixed in, but is added to the matrix powder, ( ⁇ ) the carbon required for carbide formation is added to the powder mixture by carburizing in a gas phase, ( ⁇ ) instead of carburizing, an embroidery in a gas phase carried out to convert the ferroalloy particles into nitrides (TiN, NbN, VN)
  • the process according to the invention is distinguished from known processes by the following advantages (1)
  • the HT formed in-situ reach a high hardness of 2000 to 3000 HV (2) They are produced in-situ from inexpensive ferroalloy particles and in a size that is known as carbide or Nitrides are only available as agglomerated powder, but agglomerated HT do not have sufficient internal strength to withstand furring abrasive particles (3)
  • the high wear resistance of the composite material according to the invention, formed in situ, is explained in comparison to known composite materials using an exemplary embodiment.
  • the hardenable steel 56NiCrMoV7 with an average powder grain size of 55 ⁇ m was used as the matrix powder.
  • the hot isostatic pressing of the evacuated powder capsules to full density took place at 1100 ° C for 3 hours an all-round pressure of 140 MPa instead of Subsequent hardening and tempering, a matrix hardness of around 700 HV was set
  • Chromium diboride is in Comparably coarse grit available, but tends to dissolve in the matrix and achieves a lower wear resistance (B) Titanium diboride is even harder than titanium carbide, but does not offer increased wear resistance (C) due to the too small particle size.
  • FIG. 1 shows the same in-situ formation of TiC particles as for A.
  • c, d schematic representation and description of the phase components, the fields labeled Fe, Ti (appearing bright in (a) and (b)) contain more iron , and less carbon than TiC and are partly eutectically solidified. At lower temperatures there are no liquid components.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
EP00964181A 1999-09-16 2000-09-15 Procede pour produire in situ un materiau composite resistant a l'usure, selon la technique de la metallurgie des poudres Expired - Lifetime EP1218555B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944592 1999-09-16
DE19944592A DE19944592A1 (de) 1999-09-16 1999-09-16 Verfahren zur pulvermetallurgischen in-situ Herstellung eines verschleissbeständigen Verbundwerkstoffes
PCT/EP2000/009055 WO2001020049A1 (fr) 1999-09-16 2000-09-15 Procede pour produire in situ un materiau composite resistant a l'usure, selon la technique de la metallurgie des poudres

Publications (2)

Publication Number Publication Date
EP1218555A1 true EP1218555A1 (fr) 2002-07-03
EP1218555B1 EP1218555B1 (fr) 2004-08-04

Family

ID=7922367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00964181A Expired - Lifetime EP1218555B1 (fr) 1999-09-16 2000-09-15 Procede pour produire in situ un materiau composite resistant a l'usure, selon la technique de la metallurgie des poudres

Country Status (6)

Country Link
US (1) US6652616B1 (fr)
EP (1) EP1218555B1 (fr)
JP (1) JP3837332B2 (fr)
AT (1) ATE272724T1 (fr)
DE (2) DE19944592A1 (fr)
WO (1) WO2001020049A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60111565T2 (de) * 2000-12-20 2006-05-11 Sandvik Intellectual Property Ab Verfahren zur Herstellung eines Metallmatrixverbundwerkstoffes und Metallmatrixverbundwerkstoff
DE10320393A1 (de) * 2003-05-06 2004-11-25 Hallberg Guss Gmbh Tribologisch optimiertes Eisengussstück
JP7100320B2 (ja) * 2018-08-07 2022-07-13 国立大学法人広島大学 Ｆｅ基焼結体、Ｆｅ基焼結体の製造方法、および熱間プレス用金型
CN109852871B (zh) * 2019-01-31 2021-02-05 株洲华斯盛高科材料有限公司 一种利用钛的氮碳化物制作的含氮钢结硬质合金
CN109852870B (zh) * 2019-01-31 2021-02-05 株洲华斯盛高科材料有限公司 一种含氮钢结硬质合金的制备方法
CN111607789B (zh) * 2020-04-27 2021-06-15 矿冶科技集团有限公司 激光熔覆原位自生碳化物颗粒增强铁基熔覆层及其制备方法

Family Cites Families (5)

* 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
JPS5134363B2 (fr) 1971-08-28 1976-09-25
JPS6188701A (ja) * 1985-09-20 1986-05-07 Japanese National Railways<Jnr> 銅系焼結集電摺動材料
JPH02270944A (ja) * 1989-04-13 1990-11-06 Hitachi Metals Ltd 耐摩耗，耐肌荒性ロール材及びその製造方法
GB2257985A (en) * 1991-07-26 1993-01-27 London Scandinavian Metall Metal matrix alloys.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0120049A1 *

Also Published As

Publication number Publication date
DE50007310D1 (de) 2004-09-09
EP1218555B1 (fr) 2004-08-04
US6652616B1 (en) 2003-11-25
ATE272724T1 (de) 2004-08-15
DE19944592A1 (de) 2001-03-22
JP2003531959A (ja) 2003-10-28
JP3837332B2 (ja) 2006-10-25
WO2001020049A1 (fr) 2001-03-22

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