EP0438560A1 - Ferrochromlegierung. - Google Patents

Ferrochromlegierung.

Info

Publication number
EP0438560A1
EP0438560A1 EP90911863A EP90911863A EP0438560A1 EP 0438560 A1 EP0438560 A1 EP 0438560A1 EP 90911863 A EP90911863 A EP 90911863A EP 90911863 A EP90911863 A EP 90911863A EP 0438560 A1 EP0438560 A1 EP 0438560A1
Authority
EP
European Patent Office
Prior art keywords
alloy
chromium
matrix
primary
microstructure
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
EP90911863A
Other languages
English (en)
French (fr)
Other versions
EP0438560A4 (en
EP0438560B1 (de
Inventor
Kevin Francis Dolman
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.)
Warman International Ltd
Original Assignee
Warman International Ltd
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 Warman International Ltd filed Critical Warman International Ltd
Publication of EP0438560A1 publication Critical patent/EP0438560A1/de
Publication of EP0438560A4 publication Critical patent/EP0438560A4/en
Application granted granted Critical
Publication of EP0438560B1 publication Critical patent/EP0438560B1/de
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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
    • 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

Definitions

  • the present invention relates to a ferrochromium alloy and more particularly to an erosion and corrosion resistant ferrochromium alloy.
  • the present invention is designed for use in thn formation of parts for lining pumps, pipes, nozzles, mixers and similar devices which, in service, can be subjected to mixtures containing a corrosive fluid and abrasive particles.
  • Typical applications for such parts include flue gas desulphurization, in which the parts are exposed to sulphuric acid and limestone, and fertiliser production, in which the parts are exposed to phosphoric acid, nitric acid and gypsum.
  • An object of the present invention is to provide a ferrochromium alloy which has improved erosion and corrosion resistance compared with the alloys disclosed in the Abex U.S. patents.
  • the present invention is based on the realization that by increasing both the chromium and carbon concentrations of alloys of the type disclosed in the Abex U.S. patents it is possible to increase the volume fraction of the chromium carbide phase, and thereby improve the wear resistance characteristics of the ferrochromium alloys, while maintaining the matrix at a chromium concentration which is at a level that will not lead to the formation of significant amounts of sigma phase. It can be appreciated that by improving the wear resistance of the ferrochromium alloys, in view of the mechanism by which erosion and corrosion occurs, as noted above, it is possible to realize an improvement in the erosion and corrosion resistance of the ferrochromium alloys.
  • an erosion and corrosion resistant ferrochromium alloy comprising the following composition, in wt. %.
  • micro-alloying elements selected from the group consisting of titanium, zirconium, niobium, boron, vanadium and tungsten, and balance, iron and incidental impurities, with a microstructure comprising eutectic chromium carbides in a matrix comprising one or more of ferrite, retained austenite and martensite, as herein defined.
  • ferrous is herein understood to mean body-centred cubic iron (in the alpha and/or delta forms) containing a solid solution of chromium.
  • the ternA"austenite is herein understood to mean face-centred cubic iron containing solid solutions of carbon ajtd chromium.
  • austenite is herein understood to mean a transformation product of austenite.
  • the matrix contains a 25-35 wt. % solid solution of chromium.
  • the microstructure further comprises one of primary chromium carbides, primary ferrite or primary austenite in the matrix.
  • the preferred amount in wt %. of the elements chromium, carbon, manganese, silicon, molybdenum, nickel and copper is as follows:
  • the matrix contains a 29-32 wt. % solid solution of chromium.
  • increasing both the chromium and carbon contents of the ferrochromium alloy above the levels disclosed in the Abex U.S. patents permits the formation of a greater volume fraction of hard carbides to enhance wear resistance. More specifically, and preferably, a stoichiometric balance in the increase in chromium and carbon contents permits the formation of a greater volume fraction of chromium carbides without increasing the chromium content of the matrix to a critical level above which sigma phase embrittlement occurs.
  • The_ alloy of the present invention has a diff-arent microstructure to that of the alloys disclosed in the Abex U.S. patents. The difference is illustrated in the accompanying figures which comprise photocopies of photomicrographs of an alloy disclosed in the Abex U.S. patents and preferred alloys of the present invention.
  • Figure 1 shows the microstructure of an Abex alloy which comprises 28.4% chromium, 1.94% carbon, 0.97% manganese, 1.48% silicon, 2.10% molybdenum, 2.01% nickel and 1.49% copper, the balance substantially iron.
  • the microstructure consists of primary austenite dendrites (50% volume) and a eutectic structure comprising eutectic carbides in a matrix of eutectic ferrite, retained austenite and martensite.
  • Figure 2 shows the microstructure of one preferred alloy of the present invention which comprises 35.8% chromium, 1.94% carbon, 0.96% manganese, 1.48% silicon, 1.94% carbon, 0.96% manganese, 1.48% silicon, 2.06% molybdenum, 2.04% nickel, 1.48% copper, the balance substantially iron.
  • the microstructure is hypereutectic with primary ferrite dendrites (20% volume) and a eutectic structure comprising finely dispersed eutectic carbides in a matrix of eutectic ferrite. It is noted that when compared with the microstructure of the Abex U.S.
  • the microstructure of Figure 2 reflects that there is a reduced volume of primary dendrites and an increased volume of the eutectic matrix and since the eutectic matrix has a relatively high proportion of carbides there is an overall increase in the volume fraction of hard carbides in the alloy when compared with the Abex alloy. It is noted that the foregoing phenomenon is also apparent to a greater extent from a comparison of the microstructures shown in Figs. 3 to 5 and Fig. 1.
  • Figure 3 shows the microstructure of another preferred alloy of the present invention which comprises 40.0% chromium, 1.92% carbon, 0.96% manganese, 1.59% silicon, 1.95% molybdenum, 1.95% nickel, 1.48% copper, the balance substantially iron.
  • the microstructure consists of eutectic carbides in a matrix of eutectic ferrite.
  • Figure 4 shows the microstructure of another preferred alloy of the present invention which comprises 40.0% chromium, 2.30% carbon, 2.77% manganese, 1.51% silicon, 2.04% molybdenum, 1.88% nickel, 1.43% copper, the balance substantially iron.
  • the microstructure is hypereutectic with primary M 7 C 3 carbides and a eutectic structure comprising eutectic carbides in a matrix of eutectic ferrite.
  • Figure 5 shows the micr structure of another preferred alloy of the present invention which comprises 43% chromium, 2.02% carbon, 0.92 manganese, 1.44% silicon, 1.88% molybdenum, 1.92% nickel, 1.2% copper, the balance substantially iron.
  • the microstructure in this case is hypereutectic with trace amounts of primary M C carbides and a eutectic structure comprising eutectic carbides in a matrix of eutectic ferrite.
  • any suitable conventional casting and heat treatment technology may be used to produce the alloys of the present invention.
  • the alloys are formed by casting and then heat treating at a temperature in the range of 600 to 1000°C followed by air cooling.

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)
  • Materials For Medical Uses (AREA)
  • Soft Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)
  • Heat Treatment Of Articles (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Braking Arrangements (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Chemically Coating (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Hard Magnetic Materials (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Physical Vapour Deposition (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Earth Drilling (AREA)
EP90911863A 1989-08-04 1990-08-03 Ferrochromlegierung Expired - Lifetime EP0438560B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU5628/89 1989-08-04
AUPJ562889 1989-08-04
PCT/AU1990/000331 WO1991002101A1 (en) 1989-08-04 1990-08-03 A ferrochromium alloy

Publications (3)

Publication Number Publication Date
EP0438560A1 true EP0438560A1 (de) 1991-07-31
EP0438560A4 EP0438560A4 (en) 1992-01-15
EP0438560B1 EP0438560B1 (de) 1996-04-24

Family

ID=3774096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90911863A Expired - Lifetime EP0438560B1 (de) 1989-08-04 1990-08-03 Ferrochromlegierung

Country Status (11)

Country Link
EP (1) EP0438560B1 (de)
KR (1) KR940003890B1 (de)
CN (1) CN1029692C (de)
AT (1) ATE137274T1 (de)
CA (1) CA2037921C (de)
DE (1) DE69026701T2 (de)
ES (1) ES2087159T3 (de)
HK (1) HK1006859A1 (de)
HU (1) HU212085B (de)
TW (1) TW208044B (de)
WO (1) WO1991002101A1 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4409278A1 (de) * 1994-03-18 1995-09-21 Klein Schanzlin & Becker Ag Korrosions- und verschleißbeständiger Hartguß
DE19512044A1 (de) * 1994-05-17 1995-11-23 Klein Schanzlin & Becker Ag Hartguß mit hoher Korrosions- und Verschleißbeständigkeit
EP0760019B1 (de) * 1994-05-17 1997-11-19 KSB Aktiengesellschaft Hartguss mit hoher korrosions- und verschleissbeständigkeit
SE522667C2 (sv) * 2000-05-16 2004-02-24 Proengco Tooling Ab Förfarande för framställning av en legering baserad på järn innehållande kromkarbid med inlöst volfram och en sådan legering
CN1353204B (zh) * 2000-11-09 2012-05-23 国立清华大学 高熵多元合金
CN101563523B (zh) * 2006-04-21 2014-07-09 国际壳牌研究有限公司 高强度合金
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
US9080229B2 (en) 2012-05-07 2015-07-14 Ut-Battelle, Llc Nano-composite stainless steel
CN102747304A (zh) * 2012-06-23 2012-10-24 昆明嘉和科技股份有限公司 一种耐腐蚀耐磨蚀合金材料及其制备方法
CN103668176B (zh) * 2012-09-20 2016-01-20 丹阳宏图激光科技有限公司 利于提高硬度与耐磨性的齿轮的激光熔覆修复工艺
CN103436800A (zh) * 2013-07-18 2013-12-11 襄阳五二五泵业有限公司 一种高耐磨蚀和耐腐蚀的铁铬合金
JP6151304B2 (ja) 2015-05-26 2017-06-21 山陽特殊製鋼株式会社 生産性および耐食性が高く安価な硬質粉末を用いたショットピーニング用投射材
CN105003758A (zh) * 2015-06-15 2015-10-28 淄博滕坤工贸有限公司 一种混凝土泵车用高合金耐磨双层复合直管
CN105483558A (zh) * 2015-12-08 2016-04-13 襄阳五二五泵业有限公司 一种烟气脱硫泵用高铬合金材料及其制造方法
CN105755362B (zh) * 2016-02-23 2017-09-01 湖南省冶金材料研究院 一种高碳高铬粉末冶金耐磨材料及其制备方法
CN107747055A (zh) * 2017-09-28 2018-03-02 江苏晶王新材料科技有限公司 一种抗磨轻金属材料
CN107988540A (zh) * 2017-12-01 2018-05-04 张海江 一种耐磨稀土合金及其制备方法
CN108397086B (zh) * 2018-02-28 2019-04-30 苏州盈腾五金制品有限公司 一种耐腐蚀塑钢门窗
CN112226671A (zh) * 2020-09-29 2021-01-15 安徽索立德铸业有限公司 一种水泵铸件用耐磨耐腐合金及其制备方法
CN113215479A (zh) * 2021-05-07 2021-08-06 福建辉丰环境工程科技有限公司 一种高耐磨钢材的制备方法
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB220006A (en) * 1923-02-09 1924-08-11 Robert Abbott Hadfield Improvements in or relating to alloys
GB362375A (en) * 1930-05-19 1931-11-25 Bernhard Vervoort Improvements in and relating to the manufacture of cast iron articles
GB401644A (en) * 1932-02-11 1933-11-16 Krupp Ag Improvements in chromium cast iron alloys
US3086858A (en) * 1960-07-22 1963-04-23 West Coast Alloys Co Hard cast alloy
LU63431A1 (de) * 1971-06-29 1973-01-22

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Handbuch der Fertigungstechnik, vol. 4/2, Carl Hanser Verlag München, (1987), pp. 954/955; *
Handbuch der Sonderstahlkunde, E. Houdremont, Springer Verlag (1956), pp 623-627 *
No further relevant documents have been disclosed. *
See also references of WO9102101A1 *

Also Published As

Publication number Publication date
HU906124D0 (en) 1991-07-29
EP0438560A4 (en) 1992-01-15
CA2037921C (en) 2006-11-21
CN1050569A (zh) 1991-04-10
KR920701499A (ko) 1992-08-11
ES2087159T3 (es) 1996-07-16
HK1006859A1 (en) 1999-03-19
DE69026701D1 (de) 1996-05-30
CN1029692C (zh) 1995-09-06
DE69026701T2 (de) 1996-12-12
WO1991002101A1 (en) 1991-02-21
CA2037921A1 (en) 1991-02-04
HU212085B (en) 1996-02-28
ATE137274T1 (de) 1996-05-15
KR940003890B1 (ko) 1994-05-04
EP0438560B1 (de) 1996-04-24
TW208044B (de) 1993-06-21
HUT57285A (en) 1991-11-28

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