EP0346293A1 - Legierung auf Eisenbasis für die Aussenschicht der Walzwerkarbeitswalze - Google Patents

Legierung auf Eisenbasis für die Aussenschicht der Walzwerkarbeitswalze Download PDF

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Publication number
EP0346293A1
EP0346293A1 EP89830217A EP89830217A EP0346293A1 EP 0346293 A1 EP0346293 A1 EP 0346293A1 EP 89830217 A EP89830217 A EP 89830217A EP 89830217 A EP89830217 A EP 89830217A EP 0346293 A1 EP0346293 A1 EP 0346293A1
Authority
EP
European Patent Office
Prior art keywords
alloy
per
ferrous alloy
elements
rolling mill
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.)
Withdrawn
Application number
EP89830217A
Other languages
English (en)
French (fr)
Inventor
Ferruccio Innse Innocenti Santeustacchio Camplani
Gianni Innse Innocenti Santeustacchio Songini
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.)
Rina Consulting Centro Sviluppo Materiali SpA
Original Assignee
Centro Sviluppo Materiali SpA
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 Centro Sviluppo Materiali SpA filed Critical Centro Sviluppo Materiali SpA
Publication of EP0346293A1 publication Critical patent/EP0346293A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • 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

Definitions

  • the object of this invention is the production of a ferrous alloy that can be advantageously used especially for forming the working layer on rolling mill rolls and more generally for making products subject to wear and thermal fatigue.
  • rolls are subject to wear and thermal fatigue, with consequent crack formation. They are also subject to encrustations of hard oxides coming from the strip or plate (banding), the nature of which must be properly controlled.
  • a technology has thus been developed for the production of rolls by compound casting methods, preferably centrifugal casting, so as to obtain rolls with a central part consisting of conventional high toughness material (e.g. spheroidal cast iron) clad with a different material, whose thickness depends on the type of use, and in the case of flat rolling is around 70 mm for instance possessing the following characteristics: - resistance to wear, both localized (comet's tail) and generalized over the whole of the working body of the roll; - resistance to thermal fatigue under normal rolling conditions and burning in the event of rolling accidents; - high mechanical strength, especially as regards maintenance of the roll profile; - ability to form lubricating surface oxides that adhere well to the roll body to counter banding.
  • conventional high toughness material e.g. spheroidal cast iron
  • High-chromium cast irons are dual-or triple-phase materials containing around 3% C and 10-20% Cr by weight, characterized by a highles hardenable matrix and by reticular carbides. Said materials have good wear resistance owing to the high volume fraction of said reticular carbides, however, they have low thermal fatigue resistance and little burning resistance. Reticular carbides, are, in fact, considered to be the site of preferential thermal-crack initiation and propagation.
  • Said globular carbides have been obtained through a specific association which links the carbon with elements like Nb, V and Ti that form primary carbides.
  • the object of this invention is thus the production of a ferrous alloy that can be used to clad rolls by casting techniques, endowed with high mechanical strenght and very good wear and thermal fatigue resistance, having a dual phase structure with a martensitic matrix characterized by the fact that it contains only globular carbides uniformly distributed and having a volume fraction between 5 and 45%, preferably 5 and 35%.
  • This ferrous alloy can advantageously include between 0.5 and 5.0 % Mo by wt.
  • Other elements such as Mn and/or Si and/or Ni can be present in the alloy to control hardneability.
  • the preferred quantities of these elements are 0.5-1.5 % Mn by wt, °.5-1.5 % Si by wt and up to 2 % Ni by wt.
  • the martensitic structure with globular carbides as per the invention is obtained by casting techniques, e.g. centrifugal casting known to experts in this field, whereby it is possible to optimize carbide dimensions to suit the end use by appropriately adapting process parameters. For instance, it is preferable to have mostly small carbides when thermal fatigue resistance is to be favoured, while a greater quantity of larger carbides is preferred when the aim is better wear resistance.
  • a major advantage of the alloy as per the invention stems from the fact that the above characteristics are attained without subjecting the ensuing products to mechanical working after production of the alloy by melting and casting. Hence the alloy is particularly suitable for use in all those products requiring a dual phase structure like the one described, without having to be subjected to mechanical working processes.
  • a further advantage of the alloy which makes it particularly suitable in the hot rolling field stems from the fact that by varying the concentrations of the specific elements within the ranges defined, it is possible to achieve the optimum combination of wear resistance and thermal fatigue resistance to suit the desired use (roughing stands, first finishers or final finishers).
  • the microstructures obtained consist of primary globular carbides dispersed in a martensitic matrix containing no reticulate carbides. Hardnesses exceeded 600 HV.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
EP89830217A 1988-06-10 1989-05-17 Legierung auf Eisenbasis für die Aussenschicht der Walzwerkarbeitswalze Withdrawn EP0346293A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4807088 1988-06-10
IT8848070A IT1226780B (it) 1988-06-10 1988-06-10 Lega ferrosa impiegabile per realizzare lo strato di lavoro dei cilindri da laminazione

Publications (1)

Publication Number Publication Date
EP0346293A1 true EP0346293A1 (de) 1989-12-13

Family

ID=11264345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830217A Withdrawn EP0346293A1 (de) 1988-06-10 1989-05-17 Legierung auf Eisenbasis für die Aussenschicht der Walzwerkarbeitswalze

Country Status (4)

Country Link
EP (1) EP0346293A1 (de)
DE (1) DE346293T1 (de)
ES (1) ES2013974A4 (de)
IT (1) IT1226780B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395477A1 (de) * 1989-04-21 1990-10-31 Kanto Special Steel Works Ltd. Stahl mit hoher Verschleissfestigkeit für die Walzen von Kaltwalzwerken
DE4106420A1 (de) * 1990-02-28 1991-08-29 Hitachi Metals Ltd Verschleissfeste verbundwalze
BE1006356A3 (fr) * 1991-12-19 1994-08-02 Fond Marichal Ketin & Cie Sa D Cylindre de travail bimetallique pour le laminage a chaud de bandes d'acier.
EP0698670A1 (de) * 1994-06-29 1996-02-28 Kawasaki Steel Corporation Material für die Aussenschicht einer Warmumformwalze und Verfahren zur Herstellung einer Warmumformwalze
AU691060B2 (en) * 1995-02-14 1998-05-07 Kawasaki Steel Corporation Roll outer layer material for hot rolling and method of manufacturing roll for hot rolling
US11085102B2 (en) 2011-12-30 2021-08-10 Oerlikon Metco (Us) Inc. Coating compositions
US11253957B2 (en) 2015-09-04 2022-02-22 Oerlikon Metco (Us) Inc. Chromium free and low-chromium wear resistant alloys
US11939646B2 (en) 2018-10-26 2024-03-26 Oerlikon Metco (Us) Inc. Corrosion and wear resistant nickel based alloys
US12076788B2 (en) 2019-05-03 2024-09-03 Oerlikon Metco (Us) Inc. Powder feedstock for wear resistant bulk welding configured to optimize manufacturability
US12227853B2 (en) 2019-03-28 2025-02-18 Oerlikon Metco (Us) Inc. Thermal spray iron-based alloys for coating engine cylinder bores
US12378647B2 (en) 2018-03-29 2025-08-05 Oerlikon Metco (Us) Inc. Reduced carbides ferrous alloys

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB669396A (en) * 1938-12-06 1952-04-02 Boehler & Co Ag Geb Hot working tools and alloys therefor
DE1225871B (de) * 1963-05-24 1966-09-29 Boehler & Co Ag Geb Schnellarbeitsstaehle mit erhoehter Verschleissfestigkeit
US3367770A (en) * 1965-02-01 1968-02-06 Latrobe Steel Co Ferrous alloys and abrasion resistant articles thereof
GB1140070A (en) * 1965-11-18 1969-01-15 Nat Twist Drill & Tool Co Titanium steel alloys
SU339593A1 (de) * 1970-10-19 1972-05-24 В. Ф. Моисеев, А. О. Аранович , С. С. Федосиенко Московский станкоинструментальный институт
US3901690A (en) * 1971-05-11 1975-08-26 Carpenter Technology Corp Wear resistant alloy steels containing cb and one of ti, hf or zr

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB669396A (en) * 1938-12-06 1952-04-02 Boehler & Co Ag Geb Hot working tools and alloys therefor
DE1225871B (de) * 1963-05-24 1966-09-29 Boehler & Co Ag Geb Schnellarbeitsstaehle mit erhoehter Verschleissfestigkeit
US3367770A (en) * 1965-02-01 1968-02-06 Latrobe Steel Co Ferrous alloys and abrasion resistant articles thereof
GB1140070A (en) * 1965-11-18 1969-01-15 Nat Twist Drill & Tool Co Titanium steel alloys
SU339593A1 (de) * 1970-10-19 1972-05-24 В. Ф. Моисеев, А. О. Аранович , С. С. Федосиенко Московский станкоинструментальный институт
US3901690A (en) * 1971-05-11 1975-08-26 Carpenter Technology Corp Wear resistant alloy steels containing cb and one of ti, hf or zr

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5061441A (en) * 1989-04-21 1991-10-29 Kawasaki Steel Corporation Highly wear-resistant roll steel for cold rolling mills
EP0395477A1 (de) * 1989-04-21 1990-10-31 Kanto Special Steel Works Ltd. Stahl mit hoher Verschleissfestigkeit für die Walzen von Kaltwalzwerken
DE4106420A1 (de) * 1990-02-28 1991-08-29 Hitachi Metals Ltd Verschleissfeste verbundwalze
BE1006356A3 (fr) * 1991-12-19 1994-08-02 Fond Marichal Ketin & Cie Sa D Cylindre de travail bimetallique pour le laminage a chaud de bandes d'acier.
CN1069234C (zh) * 1994-06-29 2001-08-08 川崎制铁株式会社 有轧辊外层材料的热轧用轧辊及其制造方法
EP0698670A1 (de) * 1994-06-29 1996-02-28 Kawasaki Steel Corporation Material für die Aussenschicht einer Warmumformwalze und Verfahren zur Herstellung einer Warmumformwalze
US5674171A (en) * 1994-06-29 1997-10-07 Kawasaki Steel Corporation Roll outer layer material for hot rolling and method of manufacturing roll for hot rolling
AU691060B2 (en) * 1995-02-14 1998-05-07 Kawasaki Steel Corporation Roll outer layer material for hot rolling and method of manufacturing roll for hot rolling
US11085102B2 (en) 2011-12-30 2021-08-10 Oerlikon Metco (Us) Inc. Coating compositions
US11253957B2 (en) 2015-09-04 2022-02-22 Oerlikon Metco (Us) Inc. Chromium free and low-chromium wear resistant alloys
US12378647B2 (en) 2018-03-29 2025-08-05 Oerlikon Metco (Us) Inc. Reduced carbides ferrous alloys
US11939646B2 (en) 2018-10-26 2024-03-26 Oerlikon Metco (Us) Inc. Corrosion and wear resistant nickel based alloys
US12227853B2 (en) 2019-03-28 2025-02-18 Oerlikon Metco (Us) Inc. Thermal spray iron-based alloys for coating engine cylinder bores
US12076788B2 (en) 2019-05-03 2024-09-03 Oerlikon Metco (Us) Inc. Powder feedstock for wear resistant bulk welding configured to optimize manufacturability

Also Published As

Publication number Publication date
ES2013974A4 (es) 1990-06-16
IT1226780B (it) 1991-02-07
IT8848070A0 (it) 1988-06-10
DE346293T1 (de) 1990-04-12

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