EP0760019A1 - Fonte coquillee a haute resistance a la corrosion et a l'usure - Google Patents

Fonte coquillee a haute resistance a la corrosion et a l'usure

Info

Publication number
EP0760019A1
EP0760019A1 EP95921744A EP95921744A EP0760019A1 EP 0760019 A1 EP0760019 A1 EP 0760019A1 EP 95921744 A EP95921744 A EP 95921744A EP 95921744 A EP95921744 A EP 95921744A EP 0760019 A1 EP0760019 A1 EP 0760019A1
Authority
EP
European Patent Office
Prior art keywords
weight
cast iron
corrosion
chilled casting
wear resistant
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
EP95921744A
Other languages
German (de)
English (en)
Other versions
EP0760019B1 (fr
Inventor
Anja Dwars
Heinz KÖPER
Wolfgang Prechtl
Jörg SCHRÖPFER
Hermann Tischner
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.)
KSB AG
Original Assignee
KSB 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25936644&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0760019(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19512044A external-priority patent/DE19512044A1/de
Application filed by KSB AG filed Critical KSB AG
Publication of EP0760019A1 publication Critical patent/EP0760019A1/fr
Application granted granted Critical
Publication of EP0760019B1 publication Critical patent/EP0760019B1/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
    • C22C37/00—Cast-iron alloys
    • C22C37/06—Cast-iron alloys containing chromium
    • C22C37/08—Cast-iron alloys containing chromium with nickel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12785—Group IIB metal-base component
    • Y10T428/12792—Zn-base component
    • Y10T428/12799—Next to Fe-base component [e.g., galvanized]

Definitions

  • C-containing Fe-based Cr hard cast iron in applications with hydroabrasive wear.
  • a material of this grade has a C content of over 2.0% by weight. Examples of this are the materials No. 0.9630, No. 0.9635, No. 0.9645 and No. 0.9655. Since a large proportion of the Cr is used for carbide formation in these materials, they only have a corrosion resistance which corresponds approximately to that of unalloyed cast iron.
  • the material GX 170 Cr o 25 2 is an example of this.
  • the entire group, to which the material mentioned belongs, has the major disadvantage that in chemically aggressive media, such as acidic, chloride-containing waters of flue gas desulfurization systems, corrosion resistance only occurs at very high Cr -Hold is achieved.
  • Corrosion-resistant stainless steels are therefore used for aggressive media of the type mentioned, the wear resistance of which is slightly improved by a low carbon content ( ⁇ 0.5%) and the resulting low volume fraction of carbides.
  • the material 1.4464 is an example of this.
  • the invention has for its object to provide a metallic casting material, the wear resistance corresponds approximately to that of the commercially available types of hard cast iron, but which is also characterized by a high corrosion resistance in aggressive media.
  • the material according to the invention also has good castability. It can therefore be manufactured in conventional stainless steel foundries. This chilled cast iron is also easy to machine.
  • the austenite former nickel Due to the targeted addition of the austenite former nickel in the concentration range of 5 to 12 MA%, it is possible to set the ratio of the phase fractions ferrite and austenite in the matrix in a defined manner.
  • the positive properties of a duplex structure in stainless steel are used here.
  • the normally extremely high brittleness of chilled cast iron grades with high C contents and a carbide network in a ferritic matrix is avoided by the predominant incorporation of the chrome Carbides in the austenitic phase. Since the austenitic phase, unlike the ferrite phase, does not become brittle due to the precipitation of intermetallic phases or segregation processes, the risk of cracking between carbides and the matrix is not as great as with a purely ferritic matrix.
  • the upper limit is determined by the requirement to obtain a structure that consists of precipitation-free ferrite, austenite and carbides, even after air cooling of large components, since the formation of austenite brings about a chromium enrichment of the ferrite phase and thereby the excretion of ⁇ phase promotes. Too high a Si content, which therefore affects ax. l% by weight is limited. With the composition proposed in claim 2, an optimal combination of corrosion and wear resistance is achieved.
  • the molybdenum content within the limits specified in claims 1 to 3 is essential for the corrosion resistance, especially in acid media containing chloride.
  • the Cu content is limited to 3% by mass.
  • a low copper content leads to a better one
  • Corrosion resistance in oxidizing media therefore it is a component of commercially available high-alloy duplex steels. It is also an advantage of the Cu content permitted in the material according to the invention that recycling material of commercially available, high-alloy cast steel can be used when melting.
  • the corrosion and wear resistance of the material according to the invention can be adjusted according to a specified requirement profile.
  • the material according to the invention has a clear superiority over the previously known chilled cast iron grades used when subjected to hydroabrasive wear.
  • Fig. L is a diagram of the removal rates of the materials in hydroabrasive wear.
  • Fig. 2 is a diagram of the corrosion rates in strongly acidic, chloride-containing medium (pH 0.5; 10 g / 1 Cl -; 60 ° C).
  • a model wear apparatus was used, in which quartz sand-water was used as an attacking agent in a mixing ratio of 1: 1 with a grain size of 0.9 to 1.2 mm.
  • the test duration was two hours each.
  • a speed of 3000 1 / min was run.
  • Each material sample had a diameter of 55 mm and a thickness of 5 mm.
  • the ordinates of the diagrams shown in FIGS. 1 and 2 each show the removal in mm / a.
  • On the abscissa are known letters A to D, in a subsequent first Materials specified in the table are occupied, while the identification E relates to the material according to the invention, the composition of which is shown in a second table.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Heat Treatment Of Steel (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Heat Treatment Of Articles (AREA)
  • Mold Materials And Core Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polymerisation Methods In General (AREA)
  • Powder Metallurgy (AREA)
EP95921744A 1994-05-17 1995-05-11 Fonte coquillee a haute resistance a la corrosion et a l'usure Expired - Lifetime EP0760019B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4417261 1994-05-17
DE4417261 1994-05-17
DE19512044 1995-03-31
DE19512044A DE19512044A1 (de) 1994-05-17 1995-03-31 Hartguß mit hoher Korrosions- und Verschleißbeständigkeit
PCT/EP1995/001784 WO1995031581A1 (fr) 1994-05-17 1995-05-11 Fonte coquillee a haute resistance a la corrosion et a l'usure

Publications (2)

Publication Number Publication Date
EP0760019A1 true EP0760019A1 (fr) 1997-03-05
EP0760019B1 EP0760019B1 (fr) 1997-11-19

Family

ID=25936644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95921744A Expired - Lifetime EP0760019B1 (fr) 1994-05-17 1995-05-11 Fonte coquillee a haute resistance a la corrosion et a l'usure

Country Status (8)

Country Link
US (1) US6165288A (fr)
EP (1) EP0760019B1 (fr)
JP (1) JP3897812B2 (fr)
CN (1) CN1068068C (fr)
AT (1) ATE160386T1 (fr)
BR (1) BR9507840A (fr)
ES (1) ES2111405T3 (fr)
WO (1) WO1995031581A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017223602A1 (de) 2017-12-21 2019-08-01 KSB SE & Co. KGaA Kreiselpumpe mit Gussbauteil
EP4112222A1 (fr) * 2021-06-30 2023-01-04 National Tsing Hua University Alliage ferrochrome à haute résistant à la corrosion en vrac et article le comprenant

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6761777B1 (en) 2002-01-09 2004-07-13 Roman Radon High chromium nitrogen bearing castable alloy
US20040258554A1 (en) * 2002-01-09 2004-12-23 Roman Radon High-chromium nitrogen containing castable alloy
US8479700B2 (en) * 2010-01-05 2013-07-09 L. E. Jones Company Iron-chromium alloy with improved compressive yield strength and method of making and use thereof
CN106222580B (zh) * 2016-08-22 2018-07-24 合肥东方节能科技股份有限公司 一种高精轧机切分轮合金材料及其制备方法
CN107574352A (zh) * 2017-09-12 2018-01-12 江苏金利化工机械有限公司 一种可硬化的奥氏体合金
AU2018379389B2 (en) * 2017-12-04 2024-02-22 Weir Minerals Australia Limited Tough and corrosion resistant white cast irons
CN115537683B (zh) * 2021-06-30 2024-03-12 叶均蔚 高强度耐腐蚀铁铬合金块材及其用途

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017223602A1 (de) 2017-12-21 2019-08-01 KSB SE & Co. KGaA Kreiselpumpe mit Gussbauteil
EP4112222A1 (fr) * 2021-06-30 2023-01-04 National Tsing Hua University Alliage ferrochrome à haute résistant à la corrosion en vrac et article le comprenant

Also Published As

Publication number Publication date
ATE160386T1 (de) 1997-12-15
BR9507840A (pt) 1997-09-23
US6165288A (en) 2000-12-26
CN1068068C (zh) 2001-07-04
CN1148415A (zh) 1997-04-23
AU2670395A (en) 1995-12-05
AU679381B2 (en) 1997-06-26
JP3897812B2 (ja) 2007-03-28
JPH10500176A (ja) 1998-01-06
ES2111405T3 (es) 1998-03-01
WO1995031581A1 (fr) 1995-11-23
EP0760019B1 (fr) 1997-11-19

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