EP1622734A2 - Procede de moulage par centrifugation - Google Patents

Procede de moulage par centrifugation

Info

Publication number
EP1622734A2
EP1622734A2 EP04728325A EP04728325A EP1622734A2 EP 1622734 A2 EP1622734 A2 EP 1622734A2 EP 04728325 A EP04728325 A EP 04728325A EP 04728325 A EP04728325 A EP 04728325A EP 1622734 A2 EP1622734 A2 EP 1622734A2
Authority
EP
European Patent Office
Prior art keywords
alloy
cast iron
casting
alloys
region
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
EP04728325A
Other languages
German (de)
English (en)
Other versions
EP1622734B1 (fr
Inventor
Bernd Elbracht
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.)
M Juergensen & Co KG GmbH
Original Assignee
M Juergensen & Co KG GmbH
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 M Juergensen & Co KG GmbH filed Critical M Juergensen & Co KG GmbH
Priority to PL04728325T priority Critical patent/PL1622734T3/pl
Publication of EP1622734A2 publication Critical patent/EP1622734A2/fr
Application granted granted Critical
Publication of EP1622734B1 publication Critical patent/EP1622734B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B22D19/0009—Cylinders, pistons
    • 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
    • B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
    • B22D13/023—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being horizontal

Definitions

  • the invention relates to a method for centrifugal casting, in particular of rotationally symmetrical castings such as cylinder liners made of at least two different cast iron alloys, in particular a method for producing cylinder liners with increased wear resistance of the alloy in the wear region to avoid local wear.
  • Cylinder liners are usually used in large engines, where they are - especially in poor lubricity or fuel consistency, as may often occur in marine and stationary engines - are exposed to heavy abrasion. Particularly in the region of the upper reversal point of the first piston ring, the inner surface of the liner is subjected to considerable stress, so that first there are signs of wear.
  • the invention has set itself the task of finding a cheaper way to locally increase the wear resistance.
  • the desired range can be varied from approx. 5% of the length of the bush to over 40%. Usually, however, a length of less than 10%, which is more resistant to wear, is sufficient.
  • a length of less than 10% which is more resistant to wear, is sufficient.
  • only in the upper, heavily loaded area in the vicinity of the upper reversal point of the uppermost piston ring material in a mold already in the cooling (partial) casting is added, which is during the rotation of the preferably mounted with a horizontal axis mold, since it subsequently was supplied, in particular in this supply area, but - due to the centrifugal force - also over the entire inner extent expiring, axially distributed.
  • the effect is made use of by selectively introducing the material of the second alloy composition, preferably radially outwards. If a thicker inner layer is to be produced, it will be possible to increase the temperature and / or the amount of material of the second casting or to be able to finish the cooling of the material of the first casting even at relatively high temperatures.
  • the second alloy When the first alloy is displaced and "flowed" on the surface of the first alloy (to the inside of the bush), the second alloy will mix with the underlying first alloy and may be used in areas where it does not have the desired thickness Whereabouts can be achieved, removed as a mixed alloy during machining (boring) It is possible to introduce not just two, but three or more alloys in succession, if even more complex castings are to be achieved.
  • the wear-resistant alloy penetrates very accurately, d. H. with steep transition angles with respect to the longitudinal extent or the inner surface of the casting in the already previously solidified material of the first alloy composition, so that is avoided that thin layers during running of the engine - the movement of the piston rings over the material boundary - are exposed to high mechanical loads ,
  • the alloy of the inner region ie the tread to be created later
  • the outer side consists of cast iron of a different composition
  • cast iron in the sense of the claims may be any iron-carbon alloy , including a steel.
  • the second alloy is added after the first outer alloy has begun to solidify, such that the heat of the (liquid) second alloying addition causes a portion of the first alloy to be melted and the material there is melted by trailing liquid cast iron due to the high Rotational speed is displaced during centrifugal casting. High centrifugal force and temperature ensure that the second alloy addition material is intimately fused with that of the first alloy composition without inclusions.
  • An example of a second alloy which tends to hard phase and thus to increase the wear resistance is an alloy which is characterized by additions of molybdenum and / or phosphorus and / or boron and / or an increased proportion of vanadium and / or chromium.
  • the cylinder liners produced in this way are brought to a dimension as usual on inside and outside dimension after drilling, annealed and finally processed in a honing process.
  • the increased wear resistance is advantageous because the surface structure generated by honing is retained longer.
  • FIG. 2 shows the introduction of the second alloy into the mold
  • Fig. 3 shows the finished cylinder liner, which is provided after removal of the protruding portions for use in a motor
  • FIG. 4 shows a representation of a 200-fold enlarged hard phase section.
  • the inventive method for centrifugal casting in particular of rotationally symmetrical castings such as cylinder liners of at least two different Cast iron alloys in composite casting, is performed with a first introduction of a first cast iron alloy in the liquid state in a rotating mold for generating at least the outer shell of the casting, and then possibly several times allowed to cool the previously produced casting substantially as conven- tional loan.
  • a second or even another cast iron alloy is introduced in a liquid state to a defined portion of the inner surface while maintaining the rotation of the mold, wherein the second or further cast iron alloy in a Boundary merges with the cooled material from the first or previously introduced cast iron alloy and forms a cast iron with other material properties during solidification.
  • an inner region of the casting with the further cast iron alloy is re-melted within a defined range in partial thickness of the first or preceding cast iron alloy with the other Cast iron alloy acted upon.
  • the area of the upper reversal point of the uppermost piston ring in the cylinder liner is subjected to a second cast iron alloy with re-melting of a region of the already cooler first cast iron alloy with second cast iron alloy until the first cast iron alloy has been displaced in the region in a desired layer thickness
  • portions of the casting in which mixed material (22) of both alloys, deposited from the reflowed region at the top dead center of the displaced first alloy and the second alloy, are deposited in interior regions within the first alloy shell remote from the introduction location of the second alloy, can be removed when drilling out the cylinder liner.
  • the centrifugal casting apparatus shown in Figures 1 and 2 is characterized by a liquid second material pouring device which directs the flow of molten second alloy substantially radially outward onto the first alloy shell.
  • a cylinder liner produced in this way (FIG. 3 and in detail: FIG. 4) preferably has a profile of the transition between the two alloys, at the edge of or the region (s) (- e), in which (in which) the second Alloy displaced the first alloy, which runs after drilling an inner area with a blunt angle to the cylinder liner inside, in particular connects to the inside.
  • the exterior material used is cast iron with lamellar graphite (GJL) or nodular graphite (GJS) and as the material of the interior cast iron with lamellar graphite with a high proportion of hard phase.
  • GJL lamellar graphite
  • GJS nodular graphite
  • Table 1 shows exemplary limits of ingredients.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Glass Compositions (AREA)
EP04728325A 2003-05-12 2004-04-20 Procede de moulage par centrifugation Expired - Lifetime EP1622734B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04728325T PL1622734T3 (pl) 2003-05-12 2004-04-20 Sposób odlewania odśrodkowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10321391A DE10321391B3 (de) 2003-05-12 2003-05-12 Verfahren zum Schleuderguss
PCT/DE2004/000837 WO2004101197A2 (fr) 2003-05-12 2004-04-20 Procede de moulage par centrifugation

Publications (2)

Publication Number Publication Date
EP1622734A2 true EP1622734A2 (fr) 2006-02-08
EP1622734B1 EP1622734B1 (fr) 2009-11-25

Family

ID=32981328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04728325A Expired - Lifetime EP1622734B1 (fr) 2003-05-12 2004-04-20 Procede de moulage par centrifugation

Country Status (6)

Country Link
EP (1) EP1622734B1 (fr)
JP (1) JP2006528073A (fr)
AT (1) ATE449655T1 (fr)
DE (2) DE10321391B3 (fr)
PL (1) PL1622734T3 (fr)
WO (1) WO2004101197A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302712B6 (cs) * 2010-02-04 2011-09-14 Afe Cronite Cz S.R.O. Technologie výroby bimetalických a vícevrstvých odlitku odlévaných gravitacním nebo odstredivým litím
CN103286292B (zh) * 2012-02-24 2015-02-25 常州市姚氏铸造材料有限公司 汽缸套毛坯离心铸造成型模具
DE202017001793U1 (de) * 2016-10-09 2018-01-10 Zynp Corporation Herstellungseinrichtung für Grat-Zylinderlaufbuchse und Grat-Zylinderlaufbuchse
CN106180626B (zh) * 2016-10-09 2019-08-23 中原内配集团股份有限公司 毛刺气缸套生产设备及毛刺气缸套
CN109513902A (zh) * 2018-11-28 2019-03-26 湖南四昉新材料有限公司 一种双金属轧辊套的加工方法、加工装置以及双金属轧辊套
CN110744026B (zh) * 2019-12-10 2021-04-23 安徽省岳西缸套有限公司 缸套离心铸造机
CN112846126B (zh) * 2020-12-31 2022-05-17 北京科技大学 多组元径向功能梯度材料设备的熔体流速调节系统及方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736058A (ja) * 1980-08-12 1982-02-26 Kubota Ltd Fukugoenbanjorooranoseizoho
JPS6035191B2 (ja) * 1980-11-10 1985-08-13 株式会社ト−モク 連続供給シ−トの流体塗布装置
JPS586768A (ja) * 1981-07-01 1983-01-14 Kubota Ltd 複合耐摩耗鋳物及びその製造法
JPS5919792A (ja) * 1982-07-26 1984-02-01 日揮株式会社 炭素析出防止性遠心力鋳造二層管
JPH0235021B2 (ja) * 1982-07-31 1990-08-08 Kubota Ltd Fukugoshirindaarainaa
CH661476A5 (de) * 1982-07-31 1987-07-31 Kubota Ltd Verbundzylinderlaufbuechse fuer verbrennungsmotoren.
JPS6087964A (ja) * 1983-10-20 1985-05-17 Nippon Kokan Kk <Nkk> 複合金属管の製造方法
DD224782B1 (de) * 1984-05-16 1988-07-06 Thaelmann Schwermaschbau Veb Verfahren zur herstellung von verbundgusskoerpern
JPS6123560A (ja) * 1984-07-13 1986-02-01 Kubota Ltd 複合アダマイトロ−ルの外殻の製造方法
JPS6233053A (ja) * 1985-08-05 1987-02-13 Sumitomo Light Metal Ind Ltd 多重管の製造方法
JP2857568B2 (ja) * 1993-05-21 1999-02-17 株式会社クボタ 複合シリンダライナー
FR2765819B1 (fr) * 1997-07-09 1999-08-27 Jean Claude Werquin Procede de coulee centrifuge verticale a hydrodynamique amelioree et cylindres de laminage composites, a structure equiaxes, en comportant application
JPH11236852A (ja) * 1998-02-20 1999-08-31 Kubota Corp 大型ディーゼルエンジンライナー

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004101197A2 *

Also Published As

Publication number Publication date
DE10321391B3 (de) 2004-10-14
WO2004101197A3 (fr) 2005-01-06
PL1622734T3 (pl) 2010-09-30
WO2004101197A2 (fr) 2004-11-25
DE502004010418D1 (de) 2010-01-07
EP1622734B1 (fr) 2009-11-25
ATE449655T1 (de) 2009-12-15
JP2006528073A (ja) 2006-12-14

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