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EP4069878A1 - Alliage de fer blanc à faible teneur en chrome comprenant une terre rare - Google Patents

Alliage de fer blanc à faible teneur en chrome comprenant une terre rare

Info

Publication number
EP4069878A1
EP4069878A1 EP20897173.9A EP20897173A EP4069878A1 EP 4069878 A1 EP4069878 A1 EP 4069878A1 EP 20897173 A EP20897173 A EP 20897173A EP 4069878 A1 EP4069878 A1 EP 4069878A1
Authority
EP
European Patent Office
Prior art keywords
alloy
white iron
product
melt
rare
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.)
Pending
Application number
EP20897173.9A
Other languages
German (de)
English (en)
Other versions
EP4069878A4 (fr
Inventor
Henrik BORGSTRÖM
Stefan Virtanen
Hans Karlsson
Sören Johansson
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.)
Bruzaholms Bruk AB
Original Assignee
Bruzaholms Bruk AB
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 Bruzaholms Bruk AB filed Critical Bruzaholms Bruk AB
Publication of EP4069878A1 publication Critical patent/EP4069878A1/fr
Publication of EP4069878A4 publication Critical patent/EP4069878A4/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/10—Making spheroidal graphite cast-iron
    • C21C1/105—Nodularising additive agents
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/10—Making spheroidal graphite cast-iron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/08—Making cast-iron alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/04—Cast-iron alloys containing spheroidal graphite
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys
    • C22C37/10—Cast-iron alloys containing aluminium or silicon

Definitions

  • Low-chromium white iron alloys are generally known. However, a problem is often the rather edgy carbide crystals formed within the alloy, which may increase the brittleness of the alloy product.
  • the amount of silicon (Si) in the alloy, product or alloy melt is within the range of 0.3-1 wt%, which maybe a preferred range in some embodiments.
  • the amount of manganese (Mn) in the alloy, product or alloy melt is within the range of 0.6-0.8 wt%, which maybe a preferred range in some embodiments.
  • the amount of impurities is preferably at most 1 wt%.
  • the at most 1 wt% of impurities typically comprises a plurality of compounds other than those specifically specified herein as part of the alloy or alloy melt, e.g. copper (Cu) resulting from using scrap metal as an iron source.
  • Each of said compounds comprised in the at most 1 wt% of impurities, e.g. Cu is typically present in an amount of less than 0.5 wt% or less than 0.2 wt%, preferably less than 0.1 wt% or less than 0.05 wt% of the alloy or alloy melt.
  • the RE comprises or consists of cerium (Ce), lanthanum (La) and/or yttrium (Y), preferably Ce (which is easily obtainable).
  • the balance of the alloy, product or alloy melt is Fe.
  • the alloy, product or alloy melt comprises Fe within the range of 80-90 wt%.
  • RE powder is added to the metal melt to produce the alloy melt of the present disclosure.
  • the RE powder may have a particle size distribution between 0.2 and 7 mm.
  • the RE powder may have an RE content within the range of 25-40 wt%.
  • the RE powder may comprise or consist of mischmetal.
  • the alloy melt may be used for casting a product, to obtain a white iron product.
  • the casting is preferably by line forming, shell forming, hand forming or by 3D-printed moulds or cores. Line forming maybe preferred, but shell forming has been seen to give primary austenite formation which may be desirable in some embodiments.
  • the white iron product is or comprises any of a dispersing disc, a grinding disc, a refiner disc, an abrasion resistant plate, a mixing blade, a mixing arm or a cutting blade, preferably a refiner disc and an abrasion resistant plate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Powder Metallurgy (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

La présente invention concerne un alliage de fer blanc à faible teneur en chrome comprenant un élément des terres rares (RE). L'alliage comprend 0,01 à 0,6 % en poids de RE, 1 à 2 % en poids de Cr, 2,5 à 4,2 % de C, 3 à 5 % en poids de Ni, 0,2 à 2 % en poids de Si, 0,5 à 1 % en poids de Mn, au plus 1 % en poids d'impuretés, et le reste étant constitué de Fe. L'invention concerne également un produit de fer blanc fabriqué à partir de l'alliage. En outre, l'invention concerne un procédé comprenant l'ajout d'une poudre de RE à une masse fondue de métal comprenant du Cr, du C, du Ni, du Si, du Mn et du Fe comme ci-dessus, une masse fondue d'alliage de fer blanc comprenant du RE étant ainsi formée.
EP20897173.9A 2019-12-05 2020-11-30 Alliage de fer blanc à faible teneur en chrome comprenant une terre rare Pending EP4069878A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1951404A SE1951404A1 (en) 2019-12-05 2019-12-05 Low-chromium white iron alloy comprising rare-earth
PCT/SE2020/051145 WO2021112744A1 (fr) 2019-12-05 2020-11-30 Alliage de fer blanc à faible teneur en chrome comprenant une terre rare

Publications (2)

Publication Number Publication Date
EP4069878A1 true EP4069878A1 (fr) 2022-10-12
EP4069878A4 EP4069878A4 (fr) 2024-07-10

Family

ID=75273361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20897173.9A Pending EP4069878A4 (fr) 2019-12-05 2020-11-30 Alliage de fer blanc à faible teneur en chrome comprenant une terre rare

Country Status (3)

Country Link
EP (1) EP4069878A4 (fr)
SE (1) SE1951404A1 (fr)
WO (1) WO2021112744A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1988910A (en) * 1926-10-21 1935-01-22 Int Nickel Co Chill cast iron alloy
US1988911A (en) * 1926-10-21 1935-01-22 Int Nickel Co Chill cast iron alloy
GB1181973A (en) * 1966-01-12 1970-02-18 Erik Arne Sabel The Wearing Parts of Gyratory Crushers or other Apparatus for Processing or Handling Particulate Materials
DE2140022B2 (de) * 1971-08-10 1978-01-05 Buderus'sche Eisenwerke, 6330 Wetzlar Verfahren zum herstellen von rohren aus gusseisen in metallischen schleudergusskokillen
CN106119680B (zh) * 2016-07-15 2018-07-27 中水淮河规划设计研究有限公司 一种耐海水腐蚀的稀土合金铸铁
CN107574359A (zh) * 2017-09-04 2018-01-12 湖北金标通用轧辊有限公司 一种低合金复合轧辊及其制造方法

Also Published As

Publication number Publication date
SE543605C2 (en) 2021-04-13
SE1951404A1 (en) 2021-04-13
EP4069878A4 (fr) 2024-07-10
WO2021112744A1 (fr) 2021-06-10

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Ipc: C22C 33/04 20060101ALI20240531BHEP

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