EP0335012B1 - Procédé pour la production continue par coulée centrifuge d'un composite métal-matériau dur résistant à l'usure - Google Patents

Procédé pour la production continue par coulée centrifuge d'un composite métal-matériau dur résistant à l'usure Download PDF

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Publication number
EP0335012B1
EP0335012B1 EP88121821A EP88121821A EP0335012B1 EP 0335012 B1 EP0335012 B1 EP 0335012B1 EP 88121821 A EP88121821 A EP 88121821A EP 88121821 A EP88121821 A EP 88121821A EP 0335012 B1 EP0335012 B1 EP 0335012B1
Authority
EP
European Patent Office
Prior art keywords
molten metal
casting
centrifugal casting
hard material
mould
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
Application number
EP88121821A
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German (de)
English (en)
Other versions
EP0335012A1 (fr
Inventor
Karl-Hermann Busse
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.)
Busse Karl-Hermann
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Busse Karl-Hermann
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Filing date
Publication date
Application filed by Busse Karl-Hermann filed Critical Busse Karl-Hermann
Priority to AT88121821T priority Critical patent/ATE89205T1/de
Publication of EP0335012A1 publication Critical patent/EP0335012A1/fr
Application granted granted Critical
Publication of EP0335012B1 publication Critical patent/EP0335012B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D13/00—Centrifugal casting; Casting by using centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal

Definitions

  • the invention relates to a method for the continuous production of a wear-resistant hard metal composite by centrifugal casting, in which solid powdery and / or granular synthetic metallic and / or non-metallic hard materials are temporarily poured into a centrifugal casting mold while it is being poured into a centrifugal casting mold rotating about its axis of symmetry metal melt flowing into the mold can be added.
  • a disadvantage of these procedures is, in particular, that when hard materials are added to the ladle filled with molten metal, a large part of the hard materials dissolves due to the long action time of the molten metal on the solid particles and the exchange of substances supported by stirring, for example, and therefore does not act as a wear protection or an additional time-consuming work step is associated with the sprinkling of the hard materials onto a dough or liquid centrifugal casting layer.
  • Patent Abstracts of Japan, Volume 6 No. 150 (M-148) (1028), August 10, 1982 describes a method for centrifugally casting a roll in which hard materials, e.g. WC powder to which molten metal is added in a pouring funnel.
  • the residence time of the hard materials in the molten metal is shorter than in the known processes mentioned above, but it must be doubted that a uniform distribution of the hard materials in the molten metal is achieved.
  • hard materials of low density such as B4C, TiB2, TiC, although they have a much higher hardness than, for example, tungsten carbide, cannot be used to reinforce the outer surface of the casting facing the mold wall.
  • these hard materials accumulate preferentially on the inside or in the core region of the casting are therefore ineffective with regard to the wear protection of the outer surface of cast solid bodies.
  • the invention has for its object to provide a method of the type mentioned, which in particular in a cost-effective manner a simple parameter control for reproducible generation of a hard material-metal composite for the reinforcement of large rotationally symmetrical components against wear even using metallic and non-metallic hard materials of high hardness and low density enables.
  • This object is achieved in that the added hard materials are injected into the molten metal during the pouring of the molten metal in the feed pipe of the casting device.
  • the process according to the invention reduces the dwell time of the hard materials in the molten metal before they enter the mold and increases their discharge; on the other hand, the distribution and depth of storage of the hard materials can be adjusted simply and reproducibly by the choice of the time and the duration of the injection .
  • the casting process is continued continuously with pure metal melt in order to complete the cast body.
  • Metal melts composed of alloyed or unalloyed steel or gray cast iron, pure non-ferrous metals such as cobalt and nickel or of a nickel or cobalt-based alloy are preferably suitable for the application of synthetic hard materials.
  • carbides of the elements Mo, Nb, Ta, V, W and Zr are advantageous, in particular because of their high density and low dissolution rate. Due to the high centrifugal acceleration occurring during centrifugal casting, these are transported radially through the melt towards the mold wall and accumulate in the cast body in front of the outer processing layer.
  • very hard and only slowly soluble borides, oxides and carbides of low density such as TiB2, Al2O3, TiO2, B4C, TiC
  • metals and / or high density carbides such as Co, Ni, Ta, W, TaC, W2C, WC, are connected.
  • the advantages achieved by the invention are, in particular, that the casting process for producing a hard material-metal composite takes place in a continuous and simple, inexpensive manner and that the distribution, composition, concentration and depth of the hard materials in the centrifugal casting body can be adjusted reproducibly.
  • FIG. 1 shows the diagrammatic representation of the method according to the invention for the continuous production of a wear-resistant hard material-metal composite by centrifugal casting (here: horizontal centrifugal casting).
  • the centrifugal casting mold 1 is first set into a rotational movement about its axis of symmetry by the drive rollers 2. After reaching a sufficiently high rotational speed for the uniform distribution of the molten metal in the centrifugal casting mold 1, after the usual application of a size to the mold wall (not shown in the figure), pure molten metal 3 from the ladle 4 through the casting device 5 into the cold centrifugal casting mold 1 poured. Due to the high heat dissipation caused by the cold centrifugal casting mold 1, an approx. 5 - 15 mm thick processing layer 6 solidifies immediately of the casting, the machining of this layer, the manufacturing tolerances attributable to the casting process and the mold contour can be compensated for.
  • solid powdery and / or granular hard materials 9 are then passed through an opening 10 in the casting device 5 with an inert protective gas as carrier or conveying gas 8, preferably argon the vicinity of the centrifugal casting mold 1 into which the metal stream flowing through the casting device 5 is injected.
  • an inert protective gas as carrier or conveying gas 8 preferably argon the vicinity of the centrifugal casting mold 1 into which the metal stream flowing through the casting device 5 is injected.
  • the hard materials are metered in a simple manner by adjusting the carrier gas pressure.
  • the casting process is continued by interrupting the powder supply with pure metal melt 12 until the casting is finished.
  • FIG. 2 shows, by way of example, a cross section through a roller cast according to the developed method with a processing layer made of cast steel 13, a wear-resistant layer 14 made of cast steel with embedded synthetic hard materials 15 and a core made of cast steel 16.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Centrifugal Separators (AREA)

Claims (6)

  1. Procédé de production en continu d'un composite substance dure-métal résistant à l'usure par coulée par centrifugation, qui consiste à ajouter de temps en temps, à l'aide d'un dispositif convoyeur, des substances dures synthétiques, métalliques et/ou non métalliques solides, pulvérulentes et/ou en grains pendant la coulée du métal fondu dans une coquille de coulée par centrifugation tournant autour de son axe de symétrie, caractérisé en ce qu'il consiste à injecter les substances (9) à ajouter dans le métal fondu (3) par un orifice (10) du conduit d'alimentation du dispositif d'attaque (5), en utilisant un gaz inerte d'entraînement.
  2. Procédé suivant la revendication 1, caractérisé en ce qu'il consiste à couler, avant l'addition de substances dures (9) synthétiques solides dans le métal fondu (3) pénétrant dans la coquille (1), d'abord une couche de surépaisseur (13) qui peut être enlevée.
  3. Procédé suivant la revendication 1 ou 2, caractérisé en ce qu'il consiste à poursuivre en continu, après la coulée du métal fondu (3) chargé de substances dures (9) synthétiques dans la coquille (1) de coulée par centrifugation, le processus de coulée avec du métal fondu pur.
  4. Procédé suivant l'une des revendications 1 à 3, caractérisé en ce que le métal fondu (3) est de l'acier moulé allié ou non allié ou de la fonte grise alliée ou non alliée, des métaux non ferreux purs comme le cobalt et le nickel, ou un alliage à base de nickel ou de cobalt.
  5. Procédé suivant l'une des revendications 1 à 4, caractérisé en ce qu'il consiste à utiliser, de préférence, pour l'injection dans le métal fondu (3), des carbures des éléments Mo, Nb, Ta, V, W et Zr.
  6. Procédé suivant l'une des revendications 1 à 5, caractérisé en ce qu'il consiste à utiliser, pour l'injection dans le métal fondu (3) pénétrant dans la coquille (1), des borures, des oxydes et des carbures de faible densité, comme TiB₂, Al₂O₃, TiO₂, B₄C, TiC, qui sont liés, à l'aide d'un liant minéral ou organique, par agglomération à des métaux et/ou à des carbures de grande densité, comme Co, Ni, Ta, W, TaC, W₂C, WC.
EP88121821A 1988-03-08 1988-12-29 Procédé pour la production continue par coulée centrifuge d'un composite métal-matériau dur résistant à l'usure Expired - Lifetime EP0335012B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88121821T ATE89205T1 (de) 1988-03-08 1988-12-29 Verfahren zum kontinuierlichen herstellen eines verschleissbestaendigen hartstoff-metallverbundes durch schleudergiessen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807512 1988-03-08
DE3807512A DE3807512A1 (de) 1988-03-08 1988-03-08 Verfahren zum kontinuierlichen herstellen eines verschleissbestaendigen hartstoff-metallverbundes durch schleudergiessen

Publications (2)

Publication Number Publication Date
EP0335012A1 EP0335012A1 (fr) 1989-10-04
EP0335012B1 true EP0335012B1 (fr) 1993-05-12

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EP88121821A Expired - Lifetime EP0335012B1 (fr) 1988-03-08 1988-12-29 Procédé pour la production continue par coulée centrifuge d'un composite métal-matériau dur résistant à l'usure

Country Status (4)

Country Link
EP (1) EP0335012B1 (fr)
AT (1) ATE89205T1 (fr)
DE (2) DE3807512A1 (fr)
ES (1) ES2042706T3 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
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FR2641795B1 (fr) * 1989-01-16 1993-09-24 Bronzes Ind Sa Fabrication de pieces en materiau composite
RU2171731C1 (ru) * 1999-12-20 2001-08-10 Дочернее предприятие "НЕКСУС - Производственно-коммерческая компания" Способ центробежного литья заготовок роликов машин непрерывного литья заготовок
UA29555C2 (uk) * 1999-12-20 2000-11-15 Дочірнє Підприємство "Нексус - Виробничо-Комерційна Компанія " Спосіб відцентрового відливання заготовок роликів машин безперервного відливання заготовок
AT412074B (de) * 2002-09-16 2004-09-27 Bernhard Dr Feistritzer Verfahren zur herstellung von rotationssymmetrischen guss-stücken
RU2268106C1 (ru) * 2004-07-02 2006-01-20 Юрий Апполинарьевич Караник Способ изготовления отливок
RU2381087C1 (ru) * 2008-07-14 2010-02-10 Государственное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" Способ формирования трубной заготовки
RU2443505C1 (ru) * 2010-10-06 2012-02-27 Государственное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" (ГОУ ВПО "ЮУрГУ") Способ получения стальной трубной заготовки
DE102010042402A1 (de) * 2010-10-13 2012-04-19 Federal-Mogul Burscheid Gmbh Verfahren zur Herstellung eines Kolbenrings mit eingelagerten Partikeln
CN101954466B (zh) * 2010-11-02 2015-09-02 北京中煤矿山工程有限公司 双金属复合冶金楔齿滚刀刀壳离心铸造工艺
RU2647975C1 (ru) * 2016-12-12 2018-03-21 федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ" (НИУ)") Способ получения стальных отливок центробежным литьем
RU2643850C1 (ru) * 2016-12-12 2018-02-06 Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" (ФГАОУ ВО "ЮУрГУ (НИУ)") Способ получения тонкостенной трубной заготовки
DE102017208000A1 (de) * 2017-05-11 2018-11-15 Mahle International Gmbh Verfahren zur Herstellung eines Motorblocks
JP7230782B2 (ja) * 2019-11-15 2023-03-01 トヨタ自動車株式会社 鋳造装置
RU2742093C1 (ru) * 2020-07-30 2021-02-02 Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский государственный университет (национальный исследовательский университет)" ФГАОУ ВО "ЮУрГУ (НИУ)" Способ получения стальной трубной заготовки с повышенной радиационной стойкостью
CN114210943B (zh) * 2021-12-28 2023-03-14 马鞍山市海天重工科技发展有限公司 一种卸料门弧衬板的浇注生产工艺

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE861005C (de) * 1944-09-07 1952-12-29 Gussstahlwerk Bochumer Ver Ag Verfahren zur Bildung von poren- und rissefreien Oberflaechen eines im Schleudergiessverfahren gegossenen Hohlkoerpers
US2681260A (en) * 1951-07-27 1954-06-15 Norton Co Cylinder and liner

Also Published As

Publication number Publication date
ATE89205T1 (de) 1993-05-15
ES2042706T3 (es) 1993-12-16
EP0335012A1 (fr) 1989-10-04
DE3881029D1 (de) 1993-06-17
DE3807512A1 (de) 1989-09-21

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