EP0233872B1 - Procede de traitement des metaux et alliages en vue de leur affinage - Google Patents

Procede de traitement des metaux et alliages en vue de leur affinage Download PDF

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Publication number
EP0233872B1
EP0233872B1 EP85905413A EP85905413A EP0233872B1 EP 0233872 B1 EP0233872 B1 EP 0233872B1 EP 85905413 A EP85905413 A EP 85905413A EP 85905413 A EP85905413 A EP 85905413A EP 0233872 B1 EP0233872 B1 EP 0233872B1
Authority
EP
European Patent Office
Prior art keywords
alloy
refining
process according
nickel
added
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
EP85905413A
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German (de)
English (en)
French (fr)
Other versions
EP0233872A1 (fr
Inventor
Gérard Bienvenu
Michel Jehan
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.)
Extramet Industrie SA
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Extramet Industrie SA
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 Extramet Industrie SA filed Critical Extramet Industrie SA
Priority to AT85905413T priority Critical patent/ATE56475T1/de
Publication of EP0233872A1 publication Critical patent/EP0233872A1/fr
Application granted granted Critical
Publication of EP0233872B1 publication Critical patent/EP0233872B1/fr
Anticipated expiration legal-status Critical
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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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • 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
    • C21C1/02—Dephosphorising or desulfurising
    • C21C1/025—Agents used for dephosphorising or desulfurising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C35/00—Master alloys for iron or steel

Definitions

  • the present invention relates to a process for the treatment of metals and alloys, more particularly but not exclusively of ferrous metals and alloys, in particular those having a high melting point, for example greater than 1000 ° C.
  • a refining aid is incorporated into the molten metal.
  • these additives have an important role in reducing the oxygen content.
  • the steelmaker perfectly controls the flowability of the metal, through the calibrated pouring orifices.
  • the adjuvant also makes it possible to adjust the level of elements such as sulfur, phosphorus under certain conditions of use. A favorable action on the number and morphology of inclusions is obtained. This is particularly the case for inclusions of alumina in processes where the steel has been quenched with aluminum.
  • the addition of calcium inside the liquid mass can be carried out using methods of introducing additives in the form of powder or granules.
  • the presentation EP-A-0 030 043 which insists on the importance of having a particle size as homogeneous as possible.
  • the alloy is in the form of granules and can be binary, ternary or multi-component.
  • the second metallic element is chosen from aluminum, copper, nickel, bismuth, lead, tin, lanthanum and silicon, as well as zinc or magnesium alloys.
  • the refining aid is an alloy in the form of granules, each granule having a substantially spherical shape.
  • the alloy consists of one or more metals preferably chosen from beryllium, magnesium, calcium, strontium, barium and zinc and one or more metallic elements whose composition is located in an area of the diagram phases starting from group IIA metal or pure zinc towards the first eutectic point.
  • first eutectic zone we will speak of "first eutectic zone" since it corresponds to the lowering of the melting point in the direction of a binary or multi-component eutectic. It is therefore an alloy located in the eutectic zone, including the eutectic itself, which will be the refining alloy.
  • alloys of calcium or magnesium with aluminum, copper or nickel As binary alloys, let us advantageously mention the alloys of calcium or magnesium with aluminum, copper or nickel. As ternary alloys, mention will be made, for example, of calcium, nickel, aluminum and calcium, magnesium, aluminum alloys.
  • thermodynamic level or can start from the equation expressing as a first approximation the activity coefficient of an element with high dilution in a solvent, in this case y AT (AT for alkaline- earthy or zinc).
  • the vapor pressure of the metal of group IIA chosen (or of zinc) taken separately is as low as possible; the metals chosen for the alloy form defined compounds with free enthalpy of very negative formation with which at eutectic temperature the eutectic alloy is in equilibrium.
  • the addition of the alloy into granules is done by conventional techniques of deep introduction at the level of the molten metal bath, the granules being substantially spherical, calibrated, constant and homogeneous. Their micro-structure is closed and their diameter is between 0.1 and 2.5 mm, preferably between 0.2 and 2.5 mm. This finely divided form is free from fine particle size dust; this gives the product complete safety in use; thus any danger of explosion or self-ignition due to the pyrophoricity of the reactive alloys is eliminated.
  • the invention also provides major advantages in the production of these granulated alloys. Indeed, in the case of their granulation in the liquid phase, it is possible to work at a lower temperature and to make serious energy savings.
  • the range of steels which benefit from being refined according to the invention using granules of alloys of metals of group IIA and the abovementioned metals are in particular steels with a very low content of residual elements such as carbon and silicon , for example the range of steels for deep drawing.
  • the adjuvant granules are also very suitable for refining other ranges of steels such as stainless steels.
  • non-ferrous metal metals and aluminum can be refined, for example by granules of strontium and aluminum alloys, optionally comprising lithium.
  • the calcium alloy with nickel can contain up to 16 atomic% of nickel, ie approximately 20% by weight.
  • the calcium melts around 850 ° C. and forms with nickel an eutectic alloy melting at approximately 605 ° C., corresponding precisely to the 16 atomic% mentioned. above.
  • the eutectic zone is therefore the zone located on the left of the diagram and extending up to 16 atomic% of nickel alloyed with calcium, including the eutectic itself.
  • compositions of between 5% (fusion around 800 ° C.) and 16 atomic% of nickel are chosen.
  • the Ca / Ni alloy can be added to the steel at a rate of 150 ppm per minute, an addition rate that cannot be kept with pure calcium.
  • the steel obtained appears, on analysis, to have the following composition:
  • the ternary Ca / Mg / AI alloy of Example 6 is used in particular for the treatment of lead, owing to its low melting point and to an increased dissolution rate. It is found that this alloy is of great interest for the debismutage of lead.
  • the Ca / Cu alloy of Example 7 can be used for the treatment of bronze, given its low melting point and the reduced bubbling it causes.
  • the Ca / La alloy of Example 8 can be used for the treatment of steels and cast irons, where, in addition to the reduced bubbling which it causes, it allows very good desulphurization and very fine control of the graphitization.
  • the Mg / Ni alloy of Example 9 can be used for the treatment of stainless steels, its melting point being particularly low. It causes reduced boiling, just like the Ca / Ni alloys of Examples 1 to 3.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Peptides Or Proteins (AREA)
EP85905413A 1984-11-05 1985-10-30 Procede de traitement des metaux et alliages en vue de leur affinage Expired - Lifetime EP0233872B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85905413T ATE56475T1 (de) 1984-11-05 1985-10-30 Verfahren zum behandeln, insbesondere zum feinen von metallen und legierungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8416971 1984-11-05
FR8416971 1984-11-05

Publications (2)

Publication Number Publication Date
EP0233872A1 EP0233872A1 (fr) 1987-09-02
EP0233872B1 true EP0233872B1 (fr) 1990-09-12

Family

ID=9309363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905413A Expired - Lifetime EP0233872B1 (fr) 1984-11-05 1985-10-30 Procede de traitement des metaux et alliages en vue de leur affinage

Country Status (13)

Country Link
US (1) US4652299A (ja)
EP (1) EP0233872B1 (ja)
JP (1) JP2571561B2 (ja)
KR (1) KR860700360A (ja)
AT (1) ATE56475T1 (ja)
AU (1) AU5062685A (ja)
CA (1) CA1262636A (ja)
DE (1) DE3579700D1 (ja)
DK (1) DK317586A (ja)
ES (1) ES8701850A1 (ja)
NO (1) NO862699L (ja)
PT (1) PT81432B (ja)
WO (1) WO1986002949A1 (ja)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4735771A (en) * 1986-12-03 1988-04-05 Chrysler Motors Corporation Method of preparing oxidation resistant iron base alloy compositions
US4999158A (en) * 1986-12-03 1991-03-12 Chrysler Corporation Oxidation resistant iron base alloy compositions
US4891183A (en) * 1986-12-03 1990-01-02 Chrysler Motors Corporation Method of preparing alloy compositions
US4808376A (en) * 1987-08-10 1989-02-28 The Doe Run Company Method of alloying aluminum and calcium into lead
EP0366655B1 (en) * 1988-04-04 1996-02-28 Chrysler Motors Corporation Oxidation resistant iron base alloy compositions
EP0531963B1 (en) * 1991-09-10 1996-12-04 Nippon Steel Corporation Method of controlling heat input to an alloying furnace for manufacturing hot galvanized and alloyed band steel
US6770366B2 (en) * 2000-06-28 2004-08-03 Affival S.A. Cored wire for introducing additives into a molten metal bath
FR2871477B1 (fr) * 2004-06-10 2006-09-29 Affival Sa Sa Fil fourre
FR3006695A1 (fr) 2013-06-10 2014-12-12 Mourad Toumi Procede et dispositif de traitement d'un metal ou d'un alliage metallique en fusion par une substance additive
EP3919633A4 (en) * 2019-01-31 2023-06-28 Tokyo Rope Manufacturing Co., Ltd. Heat exchange method, heat exchange medium, heat exchange device, patenting method, and carbon steel wire
JP2022103567A (ja) * 2020-12-28 2022-07-08 日立金属株式会社 荒引線の製造方法および荒引線の製造装置
CN113234889A (zh) * 2021-03-31 2021-08-10 南京钢铁股份有限公司 一种改善轴承钢中碳化物形态的方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE187414C (ja) *
US1683086A (en) * 1927-06-16 1928-09-04 Augustus F Meehan Cast iron and the method of making same
DE1220617B (de) * 1958-02-03 1966-07-07 Res Inst Iron Steel Vorlegierung fuer die Herstellung von feinkoernigen Staehlen
US2971833A (en) * 1958-04-09 1961-02-14 Le Magnesium Thermique Soc Process of manufacturing magnesium
AT327265B (de) * 1970-05-29 1976-01-26 Lenin Kohaszati Muvek Verfahren mit besonderer desoxydation zur herstellung von gut zerspanbaren karbonstahlen
US3865582A (en) * 1973-07-06 1975-02-11 Int Nickel Co Alloy additive
US4014684A (en) * 1973-11-27 1977-03-29 Foseco International Limited Manufacture of steel
US4014686A (en) * 1976-02-23 1977-03-29 United States Steel Corporation Deoxidation of open type steels for improved formability
US4137072A (en) * 1976-12-01 1979-01-30 Toyo Soda Manufacturing Co., Ltd. Additive for use in refining iron
JPS5575857A (en) * 1978-12-04 1980-06-07 Sueddeutsche Kalkstickstoff Molten metal treatment method during casting
JPS5597419A (en) * 1979-01-18 1980-07-24 Hitachi Cable Ltd Additive for iron and steel
DE2948636A1 (de) * 1979-12-04 1981-06-11 Metallgesellschaft Ag, 6000 Frankfurt Drahtfoermiges mittel zum behandeln von metallschmelzen
FR2471827A1 (fr) 1979-12-21 1981-06-26 Extramet Sa Dispositif pour la production de granules metalliques uniformes
JPS56127724A (en) * 1980-03-07 1981-10-06 Komazawa Kinzoku Kogyo Kk Deacidification of molten steel
JPS56127723A (en) * 1980-03-10 1981-10-06 Japan Steel Works Ltd:The Removal of impurities of high chromium molten steel
US4286984A (en) * 1980-04-03 1981-09-01 Luyckx Leon A Compositions and methods of production of alloy for treatment of liquid metals
JPS5767146A (en) * 1980-10-11 1982-04-23 Osaka Tokushu Gokin Kk Introduction method for antimony into cast iron
US4462823A (en) * 1982-12-11 1984-07-31 Foseco International Limited Treatment agents for molten steel
JPS6046311A (ja) * 1983-08-25 1985-03-13 Nippon Steel Corp 低融点金属含有溶鋼の製造方法

Also Published As

Publication number Publication date
US4652299A (en) 1987-03-24
PT81432A (fr) 1985-12-01
DE3579700D1 (de) 1990-10-18
KR860700360A (ko) 1986-10-06
DK317586D0 (da) 1986-07-04
DK317586A (da) 1986-07-04
ES548533A0 (es) 1987-01-01
JPS62501081A (ja) 1987-04-30
ATE56475T1 (de) 1990-09-15
WO1986002949A1 (fr) 1986-05-22
NO862699D0 (no) 1986-07-03
ES8701850A1 (es) 1987-01-01
CA1262636A (fr) 1989-11-07
AU5062685A (en) 1986-06-03
EP0233872A1 (fr) 1987-09-02
PT81432B (fr) 1987-04-09
NO862699L (no) 1986-07-03
JP2571561B2 (ja) 1997-01-16

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