EP0760019B1 - Hartguss mit hoher korrosions- und verschleissbeständigkeit - Google Patents

Hartguss mit hoher korrosions- und verschleissbeständigkeit Download PDF

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Publication number
EP0760019B1
EP0760019B1 EP95921744A EP95921744A EP0760019B1 EP 0760019 B1 EP0760019 B1 EP 0760019B1 EP 95921744 A EP95921744 A EP 95921744A EP 95921744 A EP95921744 A EP 95921744A EP 0760019 B1 EP0760019 B1 EP 0760019B1
Authority
EP
European Patent Office
Prior art keywords
weight
chilled casting
corrosion
pct
wear
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
EP95921744A
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German (de)
English (en)
French (fr)
Other versions
EP0760019A1 (de
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
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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(B1) "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/de
Application granted granted Critical
Publication of EP0760019B1 publication Critical patent/EP0760019B1/de
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    • 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 consumed for carbide formation in these materials, they only have a corrosion resistance which roughly corresponds to that of unalloyed cast iron.
  • the material GX 170 CrMo 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 water from flue gas desulfurization systems, corrosion resistance only occurs at very high Cr 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 cast material, the wear resistance corresponds approximately to that of the commercially available hard cast types, 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 usually 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 storage of chromium carbides in the austenitic phase. Since the austenitic phase, unlike the ferrite phase, does not become embrittled through the precipitation of intermetallic phases or through 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 maintain a structure consisting of precipitation-free ferrite, austenite and carbides even after air cooling of large components, since the formation of austenite causes a chromium enrichment of the ferrite phase and thereby promotes the elimination of the ⁇ phase.
  • a too high Si content would have the same undesirable effect, which would therefore lead to a max. 1% by weight is limited.
  • 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 results in better 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.
  • 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 l / 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.
  • Table 1 Known materials used for the tests Labelling Nickname A GX 250 CrMo 15 3 B GX 170 CrMo 25 2 C. GX 3 CrNiMoCu 24 6 D GX 40 CrNiMo 27 5 Alloy composition of the material according to the invention used for the tests Labelling C. Si Mn Cr Ni Mon Cu Fe E 1.5 0.7 0.6 42.1 8.2 2.5 1.6 rest

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (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)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Heat Treatment Of Articles (AREA)
  • Powder Metallurgy (AREA)
  • Mold Materials And Core Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polymerisation Methods In General (AREA)
EP95921744A 1994-05-17 1995-05-11 Hartguss mit hoher korrosions- und verschleissbeständigkeit Expired - Lifetime EP0760019B1 (de)

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 (de) 1994-05-17 1995-05-11 Hartguss mit hoher korrosions- und verschleissbeständigkeit

Publications (2)

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

Family

ID=25936644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95921744A Expired - Lifetime EP0760019B1 (de) 1994-05-17 1995-05-11 Hartguss mit hoher korrosions- und verschleissbeständigkeit

Country Status (8)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019120975A1 (de) 2017-12-21 2019-06-27 KSB SE & Co. KGaA Kreiselpumpe mit gussbauteil

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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
EA202091383A1 (ru) * 2017-12-04 2020-10-23 Уэйр Минералз Острэйлиа Лимитед Прочные и коррозионно-стойкие белые чугуны
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
TW202302873A (zh) * 2021-06-30 2023-01-16 國立清華大學 高強度耐腐蝕鐵鉻合金塊材及其用途

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019120975A1 (de) 2017-12-21 2019-06-27 KSB SE & Co. KGaA Kreiselpumpe mit gussbauteil

Also Published As

Publication number Publication date
AU2670395A (en) 1995-12-05
CN1068068C (zh) 2001-07-04
ATE160386T1 (de) 1997-12-15
US6165288A (en) 2000-12-26
CN1148415A (zh) 1997-04-23
EP0760019A1 (de) 1997-03-05
WO1995031581A1 (de) 1995-11-23
ES2111405T3 (es) 1998-03-01
JP3897812B2 (ja) 2007-03-28
JPH10500176A (ja) 1998-01-06
BR9507840A (pt) 1997-09-23
AU679381B2 (en) 1997-06-26

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