EP0141966B1 - Verfahren zum Schleudergiessen von Rohren - Google Patents

Verfahren zum Schleudergiessen von Rohren Download PDF

Info

Publication number
EP0141966B1
EP0141966B1 EP84110897A EP84110897A EP0141966B1 EP 0141966 B1 EP0141966 B1 EP 0141966B1 EP 84110897 A EP84110897 A EP 84110897A EP 84110897 A EP84110897 A EP 84110897A EP 0141966 B1 EP0141966 B1 EP 0141966B1
Authority
EP
European Patent Office
Prior art keywords
cast iron
nickel alloy
centrifugal casting
process according
liquid cast
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
Application number
EP84110897A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0141966A1 (de
Inventor
Kurt Grütter
Bernhard Bergmann
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.)
Von Roll AG
Original Assignee
Von Roll AG
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 Von Roll AG filed Critical Von Roll AG
Priority to AT84110897T priority Critical patent/ATE33352T1/de
Publication of EP0141966A1 publication Critical patent/EP0141966A1/de
Application granted granted Critical
Publication of EP0141966B1 publication Critical patent/EP0141966B1/de
Expired 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
    • 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
    • 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
    • B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/18—Measures for using chemical processes for influencing the surface composition of castings, e.g. for increasing resistance to acid attack

Definitions

  • the invention relates to a method for centrifugally casting pipes, in which liquid cast iron is introduced into a rotating metallic mold, and an additive in powder form is also introduced into it.
  • the application possibilities for the tubes manufactured by the centrifugal casting process are numerous. A particularly important and extensive area of application is the use of these pipes for the transportation of liquids of all kinds.
  • the lines created for this are often laid in the ground, whereby they come into direct contact with the surrounding soil material. Through this contact there is the possibility that a chemical or electrochemical reaction of the pipe material with its surroundings can occur, which can lead to the destruction of the pipe material.
  • the known measures mean an additional treatment of the finished pipe, for which appropriate facilities are required.
  • the tarring of the pipes should be mentioned, for which the pipes are immersed in a tar bath.
  • Other known measures include wrapping the tube with a loose plastic film, spray galvanizing or extruding a polyethylene coating. It is also known to apply an additional coating reinforced with glass fibers.
  • a nickel alloy in powder form is introduced as an additive onto the inner surface of the rotating mold before the liquid cast iron is introduced, so that an alloyed outer layer is formed on the outer surface of the tube.
  • Flux material (DE-A-3 105 145), which is used to form a sealing slag on the inner surface of the pipe, which picks up any impurities contained in the molten metal and protects the inner surface from oxidation.
  • a nickel alloy which has a nickel content of 80% and more nickel has proven to be particularly suitable.
  • the other alloying elements can be boron, silicon, chromium and copper. Such alloys are known as corrosion and heat resistant materials and are commercially available. This alloy is introduced into the centrifugal casting mold in powder form with a grain size of approximately 0.1-1 mm.
  • the specific weight of such alloys is above the specific weight of the cast iron melt and is approximately 7.8 g / cm 3 .
  • the melting point of such nickel alloys is said to be lower than 1300 ° C and is therefore lower than the casting temperature of the cast iron melt of approximately 1350 - 1380 ° C. Particularly favorable conditions are achieved when the melting point of the nickel alloy is below the liquidus temperature of the liquid cast iron, i.e. below approx. 1150 ° C.
  • centrifugal cast iron pipes made by centrifugal casting, made using the described method:
  • the liquid iron was introduced into the mold in a second operation.
  • the result was an alloyed outer skin of the pipe made of austenitic nodular iron.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Continuous Casting (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Powder Metallurgy (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP84110897A 1983-09-19 1984-09-12 Verfahren zum Schleudergiessen von Rohren Expired EP0141966B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84110897T ATE33352T1 (de) 1983-09-19 1984-09-12 Verfahren zum schleudergiessen von rohren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5082/83 1983-09-19
CH5082/83A CH660856A5 (de) 1983-09-19 1983-09-19 Verfahren zum schleudergiessen von rohren.

Publications (2)

Publication Number Publication Date
EP0141966A1 EP0141966A1 (de) 1985-05-22
EP0141966B1 true EP0141966B1 (de) 1988-04-06

Family

ID=4287638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110897A Expired EP0141966B1 (de) 1983-09-19 1984-09-12 Verfahren zum Schleudergiessen von Rohren

Country Status (6)

Country Link
EP (1) EP0141966B1 (enrdf_load_stackoverflow)
JP (1) JPS6087965A (enrdf_load_stackoverflow)
AT (1) ATE33352T1 (enrdf_load_stackoverflow)
CA (1) CA1232428A (enrdf_load_stackoverflow)
CH (1) CH660856A5 (enrdf_load_stackoverflow)
DE (1) DE3470288D1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN102274951B (zh) * 2011-08-04 2013-03-06 广东新劲刚超硬材料有限公司 一种铸件表面原位合成碳化钛基硬质合金涂层的方法
DE102015111096B4 (de) * 2015-07-09 2018-04-26 Benteler Steel/Tube Gmbh Verfahren zur Herstellung eines nahtlosen, mehrlagigen Rohrproduktes
DE102020200034A1 (de) * 2020-01-03 2021-07-08 Sms Group Gmbh Verfahren zur Herstellung eines Verbundrohres sowie Verbundrohr

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2139880A1 (de) * 1971-08-09 1973-02-22 Apv Paramount Ltd Bi-metall-rohr mit korrosionsbestaendiger aeusserer oberflaeche
JPS4852630A (enrdf_load_stackoverflow) * 1971-11-05 1973-07-24
JPS4918696A (enrdf_load_stackoverflow) * 1972-06-15 1974-02-19
IN154618B (enrdf_load_stackoverflow) * 1980-12-22 1984-11-17 Abex Corp
JPS59220266A (ja) * 1983-05-27 1984-12-11 Kawasaki Heavy Ind Ltd 遠心鋳造による複合鋼管の製造方法

Also Published As

Publication number Publication date
JPS6087965A (ja) 1985-05-17
CA1232428A (en) 1988-02-09
DE3470288D1 (en) 1988-05-11
ATE33352T1 (de) 1988-04-15
CH660856A5 (de) 1987-05-29
JPH0520184B2 (enrdf_load_stackoverflow) 1993-03-18
EP0141966A1 (de) 1985-05-22

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