SE529445C2 - Process for making compact graphite iron - Google Patents
Process for making compact graphite ironInfo
- Publication number
- SE529445C2 SE529445C2 SE0502817A SE0502817A SE529445C2 SE 529445 C2 SE529445 C2 SE 529445C2 SE 0502817 A SE0502817 A SE 0502817A SE 0502817 A SE0502817 A SE 0502817A SE 529445 C2 SE529445 C2 SE 529445C2
- Authority
- SE
- Sweden
- Prior art keywords
- cerium
- iron
- magnesium
- mold
- alloy
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 6
- 229910002804 graphite Inorganic materials 0.000 title claims description 5
- 239000010439 graphite Substances 0.000 title claims description 5
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 18
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 12
- 239000011777 magnesium Substances 0.000 claims abstract description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 10
- 239000000956 alloy Substances 0.000 claims abstract description 10
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 9
- 229910000861 Mg alloy Inorganic materials 0.000 claims abstract description 7
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 229910001126 Compacted graphite iron Inorganic materials 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 10
- 238000001816 cooling Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000636 Ce alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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
- C21C1/08—Manufacture of cast-iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
-
- 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
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
Description
25 30 35 529 445 2 i WO-01/54844, är lämplig för framställning av kompakt- grafitjärn. In-mould-tekniken baseras på att man placerar magnesiumlegeringen i en reaktionskammare i gjutsystemet i gjutformen. Vid avgjutning flyter basjärnsmältan in i gjutformen varvid legeringen successivt löses upp. Den behandlade smältan fyller därefter gjutgodskaviteten. 529 445 2 in WO-01/54844, is suitable for the production of compact graphite iron. The in-mold technique is based on placing the magnesium alloy in a reaction chamber in the casting system in the mold. During casting, the base iron melt flows into the mold, whereby the alloy is gradually dissolved. The treated melt then fills the casting cavity.
Problem med avklingning av magnesium elimineras när man använder denna process.Problems with decay of magnesium are eliminated when using this process.
Ett problem är att svavelhalten i basjärnet ofta va- rierar. Därför måste magnesiumhalten justeras. Med in- mould-behandling är det i praktiken inte möjligt, efter- som reaktionskammaren är likadan i varje gjutform. Ett annat problem är att behandling med magnesium gör struk- turen känslig för variationer i svalningshastigheten. Vid en hög svalningshastighet, t.ex. i gjutgodsets tunna sek- tioner, blir grafitstrukturen mer sfärisk. Vid låg sval- ningshastighet, t.ex. i tjocka sektioner, utskiljes gra- fiten mer i lamellär form.One problem is that the sulfur content of the base iron often varies. Therefore, the magnesium content must be adjusted. With in-mold treatment, this is not possible in practice, as the reaction chamber is the same in every mold. Another problem is that treatment with magnesium makes the structure sensitive to variations in the rate of cooling. At a high cooling rate, e.g. in the thin sections of the casting, the graphite structure becomes more spherical. At low cooling rate, e.g. in thick sections, the graphite is more precipitated in lamellar form.
Det är välkänt att behandlingslegeringar som inne- håller både magnesium och cerium reducerar dessa problem.It is well known that treatment alloys containing both magnesium and cerium reduce these problems.
Däremot kan höga nivåer av cerium öka risken för vissa defekter såsom primära karbider och mikrosugningar.However, high levels of cerium can increase the risk of certain defects such as primary carbides and micro-suctions.
Beskrivning av uppfinningen Ett syfte med uppfinningen är att lösa dessa pro- blem.Description of the invention An object of the invention is to solve these problems.
Uppfinningen avser en process för framställning av kompaktgrafitjärn med användning av in-mould-tillsats av magnesiumlegering i enlighet med krav l och där basjärnet behandlas med cerium före avgjutning. Mängden cerium ju- steras i förhållande till svavelhalten i basjärnet. Ceri- umnivån justeras enligt följande formel: (%Svavel - 0,006) * 2,9 + A Värdet för A varieras företrädesvis mellan 0,01 och %Cerium = 0,03 beroende på gjutgodsets konfiguration, dvs variation i dimensionerna för olika sektioner och gjutgodsets mo- dul. Eftersom cerium har en mycket högt koktemperatur 10 15 20 25 30 529 445 3 (3470°C) och en hög densitet (6,l4 g/cm3) visar det prak- tiskt taget ingen avklingningseffekt. Genom att tillsätta cerium i basjärnet kan det fullständigt gå i lösning och en mindre mängd magnesiumlegering behöver tillsättas i reaktionskammaren i gjutformen eftersom även cerium har en strukturformande effekt.The invention relates to a process for the production of compact graphite iron using in-mold addition of magnesium alloy according to claim 1 and wherein the base iron is treated with cerium before casting. The amount of cerium is adjusted in relation to the sulfur content of the base iron. The cerium level is adjusted according to the following formula: (% Sulfur - 0.006) * 2.9 + A The value for A is preferably varied between 0.01 and% Cerium = 0.03 depending on the configuration of the casting, ie variation in the dimensions of different sections and the casting module. Since cerium has a very high boiling temperature (3470 ° C) and a high density (6.14 g / cm 3), it shows practically no decaying effect. By adding cerium to the base iron, it can completely dissolve and a smaller amount of magnesium alloy needs to be added to the reaction chamber in the mold because cerium also has a structuring effect.
Behandlingslegeringen innehåller företrädesvis 3-6% magnesium och 0.5-l.5% lantan. Lantan har en fördelaktig effekt i att det reducerar gjutgodsdefekter såsom karbi- der och sugningar. Största effekten av lantan vad gäller sugningar är direkt efter behandling och därför är det optimalt att tillsätta lantan så sent som möjligt.The treatment alloy preferably contains 3-6% magnesium and 0.5-1.5% lanthanum. Lanthanum has a beneficial effect in that it reduces casting defects such as carbides and suctions. The greatest effect of lanthanum in terms of suction is immediately after treatment and therefore it is optimal to add lanthanum as late as possible.
De legeringar som används kan ha olika sammansätt- ning för att nå optimala resultat. Exempel på kompositio- ner för kommersiellt tillgängliga legeringar: För magnesiumlegeringen: 48% Fe, 45% Si, 5% Mg, l,O% O,5% La och 0,5% Ca, För ceriumlegeringen: Al, samt 65% Fe, 25% Ce, 7% La och återstoden andra sällsynta jordartsmetaller.The alloys used can have different compositions to achieve optimal results. Examples of compositions for commercially available alloys: For the magnesium alloy: 48% Fe, 45% Si, 5% Mg, 1.0% 0, 5% La and 0.5% Ca, For the cerium alloy: Al, and 65% Fe , 25% Ce, 7% La and the remainder other rare earth metals.
I enlighet med uppfinningens ändamål tillsätts ceri- um i ugnen eller skänken (och inte som en del av magnesi- umlegeringen) och magnesium tillsätts i gjutformen.In accordance with the object of the invention, cerium is added to the oven or ladle (and not as part of the magnesium alloy) and magnesium is added to the mold.
Med den föreslagna processen kan magnesiumtillsatsen minskas med åtminstone 30% jämfört med en traditionell in-mould behandling enbart i gjutformen.With the proposed process, the magnesium addition can be reduced by at least 30% compared to a traditional in-mold treatment in the mold alone.
Den minskade magnesiumnivàn i gjutgodset har även den fördelen att gjutgodsfel såsom dross och mikrosugningar minimeras.The reduced magnesium level in the castings also has the advantage that casting defects such as dross and micro suction are minimized.
Claims (3)
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0502817A SE529445C2 (en) | 2005-12-20 | 2005-12-20 | Process for making compact graphite iron |
| CN2006800481058A CN101341262B (en) | 2005-12-20 | 2006-12-14 | Process for production of compacted graphite iron |
| PCT/SE2006/001424 WO2007073280A1 (en) | 2005-12-20 | 2006-12-14 | Process for production of compacted graphite iron |
| KR1020087015971A KR20080089577A (en) | 2005-12-20 | 2006-12-14 | Process for production of compacted graphite iron |
| BRPI0620077-0A BRPI0620077A2 (en) | 2005-12-20 | 2006-12-14 | process for producing compressed graphite iron |
| US12/086,637 US20090183848A1 (en) | 2005-12-20 | 2006-12-14 | Process for Production of Compacted Graphite Iron |
| MX2008007968A MX2008007968A (en) | 2005-12-20 | 2006-12-14 | Process for production of compacted graphite iron. |
| EP06835848A EP1974062B1 (en) | 2005-12-20 | 2006-12-14 | Process for production of compacted graphite iron |
| US13/329,561 US20120090803A1 (en) | 2005-12-20 | 2011-12-19 | Process for producton of compacted graphite iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0502817A SE529445C2 (en) | 2005-12-20 | 2005-12-20 | Process for making compact graphite iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE0502817L SE0502817L (en) | 2007-06-21 |
| SE529445C2 true SE529445C2 (en) | 2007-08-14 |
Family
ID=38188913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE0502817A SE529445C2 (en) | 2005-12-20 | 2005-12-20 | Process for making compact graphite iron |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US20090183848A1 (en) |
| EP (1) | EP1974062B1 (en) |
| KR (1) | KR20080089577A (en) |
| CN (1) | CN101341262B (en) |
| BR (1) | BRPI0620077A2 (en) |
| MX (1) | MX2008007968A (en) |
| SE (1) | SE529445C2 (en) |
| WO (1) | WO2007073280A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101708583B1 (en) * | 2013-09-06 | 2017-02-20 | 도시바 기카이 가부시키가이샤 | Method for spheroidizing molten metal of spheroidal graphite cast iron |
| CN105785882B (en) * | 2016-05-09 | 2019-05-14 | 哈尔滨理工大学 | A kind of spheroidal graphite cast-iron nodularization inoculation dynamic regulation method and system |
| ES2901405T3 (en) * | 2016-09-12 | 2022-03-22 | Snam Alloys Pvt Ltd | A magnesium-free process to produce compact graphite iron (CGF) |
| BR102016022690B1 (en) * | 2016-09-29 | 2022-02-08 | Tupy S.A. | VERMICULAR CAST IRON ALLOY FOR INTERNAL COMBUSTION ENGINE BLOCK AND HEAD |
| CN109371191A (en) * | 2018-11-09 | 2019-02-22 | 中船海洋动力部件有限公司 | A kind of compactedization inoculation method of vermicular cast iron |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB833486A (en) * | 1956-05-02 | 1960-04-27 | British Cast Iron Res Ass | Manufacture of engineering components and of improved grey cast iron therefor |
| US3392013A (en) * | 1966-03-14 | 1968-07-09 | Owens Illinois Inc | Cast iron composition and process for making |
| US3765876A (en) * | 1972-11-01 | 1973-10-16 | W Moore | Method of making nodular iron castings |
| EP0041953B1 (en) * | 1979-12-19 | 1984-06-13 | Foseco International Limited | Production of vermicular graphite cast iron |
| DE3010623C2 (en) * | 1980-03-20 | 1982-12-02 | Metallgesellschaft Ag, 6000 Frankfurt | Apparatus for treating molten cast iron |
| CH656147A5 (en) * | 1981-03-31 | 1986-06-13 | Fischer Ag Georg | METHOD FOR PRODUCING A CAST IRON WITH VERMICULAR GRAPHITE. |
| US4806157A (en) * | 1983-06-23 | 1989-02-21 | Subramanian Sundaresa V | Process for producing compacted graphite iron castings |
| DE3801917A1 (en) * | 1988-01-23 | 1989-08-03 | Metallgesellschaft Ag | METHOD FOR PRODUCING CAST IRON WITH BALL GRAPHITE |
| NO306169B1 (en) * | 1997-12-08 | 1999-09-27 | Elkem Materials | Cast iron grafting agent and method of making grafting agent |
| SE518344C2 (en) | 2000-01-26 | 2002-09-24 | Novacast Ab | gating |
-
2005
- 2005-12-20 SE SE0502817A patent/SE529445C2/en not_active IP Right Cessation
-
2006
- 2006-12-14 US US12/086,637 patent/US20090183848A1/en not_active Abandoned
- 2006-12-14 KR KR1020087015971A patent/KR20080089577A/en not_active Application Discontinuation
- 2006-12-14 WO PCT/SE2006/001424 patent/WO2007073280A1/en active Application Filing
- 2006-12-14 EP EP06835848A patent/EP1974062B1/en not_active Not-in-force
- 2006-12-14 CN CN2006800481058A patent/CN101341262B/en not_active Expired - Fee Related
- 2006-12-14 MX MX2008007968A patent/MX2008007968A/en unknown
- 2006-12-14 BR BRPI0620077-0A patent/BRPI0620077A2/en not_active IP Right Cessation
-
2011
- 2011-12-19 US US13/329,561 patent/US20120090803A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CN101341262B (en) | 2010-12-29 |
| MX2008007968A (en) | 2008-09-26 |
| CN101341262A (en) | 2009-01-07 |
| EP1974062B1 (en) | 2013-01-23 |
| EP1974062A1 (en) | 2008-10-01 |
| BRPI0620077A2 (en) | 2011-11-01 |
| US20120090803A1 (en) | 2012-04-19 |
| SE0502817L (en) | 2007-06-21 |
| KR20080089577A (en) | 2008-10-07 |
| WO2007073280A1 (en) | 2007-06-28 |
| US20090183848A1 (en) | 2009-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |