DE2458033B2 - METHOD FOR PRODUCING A CAST IRON WITH VERMICULAR GRAPHITE - Google Patents
METHOD FOR PRODUCING A CAST IRON WITH VERMICULAR GRAPHITEInfo
- Publication number
- DE2458033B2 DE2458033B2 DE19742458033 DE2458033A DE2458033B2 DE 2458033 B2 DE2458033 B2 DE 2458033B2 DE 19742458033 DE19742458033 DE 19742458033 DE 2458033 A DE2458033 A DE 2458033A DE 2458033 B2 DE2458033 B2 DE 2458033B2
- Authority
- DE
- Germany
- Prior art keywords
- cast iron
- iron
- magnesium
- rare earth
- addition
- 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.)
- Ceased
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 15
- 229910002804 graphite Inorganic materials 0.000 title claims description 14
- 239000010439 graphite Substances 0.000 title claims description 14
- 229910001018 Cast iron Inorganic materials 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000011777 magnesium Substances 0.000 claims description 16
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 5
- 150000002910 rare earth metals Chemical class 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910001562 pearlite Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 239000011159 matrix material Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 229910052684 Cerium Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 4
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 229910001122 Mischmetal Inorganic materials 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- -1 Ce mischmetal) Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229940058905 antimony compound for treatment of leishmaniasis and trypanosomiasis Drugs 0.000 description 1
- 150000001463 antimony compounds Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- SMDQFHZIWNYSMR-UHFFFAOYSA-N sulfanylidenemagnesium Chemical compound S=[Mg] SMDQFHZIWNYSMR-UHFFFAOYSA-N 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 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
- C21C1/10—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
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Herstellen eines Gußeisens, mit überwiegend in Form von sogenannten Vermikulargraphit vorliegendem Graphit unter Zusatz von Seltenerdmetallen.The invention relates to a method for producing a cast iron, with predominantly in the form of so-called vermicular graphite present graphite with the addition of rare earth metals.
Es ist bekannt, durch Behandlung einer mit Kalziumkarbid desoxydierten und entschwefelten Ausgangsschmelze mit Cer-Mischmetall und anschließendem Impfen ein Gußeisen zu erzeugen, bei dem sich der Kohlenstoff überwiegend in würmchenartige Form (Vermikulargraphit) ausscheidet (DT-AS 19 11024). Von der Verwendung von Magnesium zur Entschwefelung wird dort abgeraten, weil Magnesiumsulfid schwer abzuscheiden ist und beim Abstehen zur Rückschwefelung neigt und weil unerwünschter Kugelgraphit auftreten kann.It is known to treat an initial melt that has been deoxidized and desulfurized with calcium carbide to produce a cast iron with cerium mischmetal and subsequent inoculation, in which the Carbon predominantly precipitates in worm-like form (vermicular graphite) (DT-AS 19 11024). The use of magnesium for desulphurisation is not recommended there because magnesium sulphide is heavy is to be deposited and tends to re-sulphurisation when standing and because it is undesirable spheroidal graphite can occur.
Es ist außerdem ein Verfahren zur Herstellung von Gußeisen mit Kugelgraphit bekannt, bei dem eine Mg-Vorbehandlung durchgeführt wird, um ein magnesiumbehandeltes Gußeisen mit Kugelgraphit zu erzeugen, welches weitgehend frei von Einschlüssen ist (Offenlegungsschrift21 43 521).There is also a method for producing spheroidal graphite cast iron is known in which a Mg pretreatment is carried out to produce a magnesium-treated spheroidal graphite cast iron, which is largely free of inclusions (Offenlegungsschrift21 43 521).
Es ist weiterhin bekannt, bei einer mit Cer behandelten Schmelze durch Zusätze von Antimon ein weitgehend perlitisches Grundgefüge zu erzeugen.It is also known that antimony can be added to a melt treated with cerium to produce largely pearlitic basic structure.
Da Antimon-Verbindungen schädliche Nebenwirkungen haben können, soll die Verwendung dieses Elementes im Gießereibetrieb möglichst vermieden werden.Because antimony compounds have harmful side effects should avoid the use of this element in the foundry as much as possible will.
Der Erfindung liegt die Aufgabe zugrunde, treffsicher und mit möglichst geringen Kosten eine Gußeisenlegierung mit Vermikulargraphit herzustellen, bei welcher je nach gewünschten Material-Eigenschaften ein ferriti-The invention is based on the object of providing a cast iron alloy accurately and at the lowest possible cost with vermicular graphite, in which, depending on the desired material properties, a ferritic
>o sches oder perlitisches Grundgefüge eingestellt werden kann, wobei die Bildung von Karbiden auch in dünnen Querschnitten möglichst vermieden werden soll.> o cal or pearlitic basic structure can be set can, whereby the formation of carbides should be avoided as far as possible, even in thin cross-sections.
Bei mit Mg behandeltem Gußeisen mit Kugelgraphit kann durch Zugabe üblicher Mengen von perlitstabili-In the case of cast iron with spheroidal graphite treated with Mg, the addition of usual amounts of pearlite-stable
'5 sierenden Elementen wie Cu, Sn, N2 ein perlitisches Grundgefüge hergestellt werden, andererseits kann die gwünschte wurmartige Graphitform nicht mit einer reinen Mg-Behandlung hervorgerufen werden.'5 sizing elements such as Cu, Sn, N2 a pearlitic Basic structure can be produced, on the other hand, the desired worm-like graphite shape can not with a pure Mg treatment.
Erfindungsgemäß wird deshalb zur Lösung derAccording to the invention is therefore to solve the
*> gestellten Aufgabe vorgeschlagen, das Ausgangseisen vor der Behandlung mit Seltenerdmetallen (z. B. Ce-Mischmetall) einer Magnesium-Behandlung zu unterziehen, wobei die Mg-Zugabemenge so bemessen ist, daß der Schwefel bis auf Werte von 0,01 %, vorzugswei-*> proposed task, the starting iron subject to a magnesium treatment before treatment with rare earth metals (e.g. Ce mischmetal), the amount of Mg added is such that the sulfur is reduced to a value of 0.01%, preferably
*5 se 0,006%, entfernt wird, aber nur eine so geringe Mg-Menge im Eisen gelöst bleibt, die nicht ausreicht, um zur Ausscheidung von kugelförmigem Graphit zu führen. Außerdem soll zwischen der Mg- und der Ce-Behandlung genügend Zeit zur Ausscheidung der Mg-Reaktionsprodukte liegen.* 5 se 0.006%, is removed, but only such a small one The amount of Mg that remains dissolved in the iron is insufficient to cause spherical graphite to precipitate to lead. In addition, there should be enough time between the Mg and Ce treatment for the Mg reaction products lie.
Das auf diese Weise vorbehandelte Eisen kann mit einer wesentlich geringeren Ce-Miischmetallmenge zur Ausscheidung von Vermikulargraphit bei der Erstarrung gebracht werden, als dieses ohne die Mg-Vorbehandlung möglich wäre. Trotzdem wurden nach der Ce-Behandlung etwa gleiche Ce-Restgehalte wie bei der normalen Behandlungsmethode gefunden.The iron pretreated in this way can be used with a significantly smaller amount of Ce mixed metal Precipitation of vermicular graphite during solidification can be brought about than this without the Mg pretreatment it is possible. Nevertheless, after the Ce treatment, the residual Ce contents were approximately the same as in the normal treatment method found.
Das erfindungsgemäß behandelte Eisen wird ohne weitere Zusätze ein überwiegend ferritisches Grundgefüge aufweisen. Da die zugegebene Ce-Menge fast ausschließlich zur Bildung des Vermikulargraphites verwendet wird, ist die Perlitbildung nicht wie bei dem normal behandelten Gußeisen mit Vermiculargraphit durch Ce erschwert.The iron treated according to the invention becomes a predominantly ferritic basic structure without further additives exhibit. Since the added amount of Ce is almost exclusively used to form vermicular graphite is used, pearlite formation is not like that Normally treated cast iron with vermicular graphite is made more difficult by Ce.
Durch Zusatz von normalen Mengen von perlitstabilisierenden Elementen wie Cu und Sn kann das erfindungsgemäß behandelte Eisen auch mit perlitischem Grundgefüge hergestellt werden.By adding normal amounts of pearlite stabilizing agents The iron treated according to the invention can also contain elements such as Cu and Sn with pearlitic Basic structure can be produced.
Da Cer in Gußeisenlegierungen die Karbidbildung stark fördert und Karbide im allgemeinen unerwünscht sind, wird bei dem erfindungsgemäß behandelten Eisen wegen der geringen Cer-Zugabemenge die Neigung zur Karbidbildung geringer.Since cerium strongly promotes carbide formation in cast iron alloys and carbides are generally undesirable are, the iron treated according to the invention, because of the small amount of cerium added, has a tendency to Less carbide formation.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742458033 DE2458033B2 (en) | 1974-12-07 | 1974-12-07 | METHOD FOR PRODUCING A CAST IRON WITH VERMICULAR GRAPHITE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742458033 DE2458033B2 (en) | 1974-12-07 | 1974-12-07 | METHOD FOR PRODUCING A CAST IRON WITH VERMICULAR GRAPHITE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2458033A1 DE2458033A1 (en) | 1976-06-10 |
| DE2458033B2 true DE2458033B2 (en) | 1977-10-13 |
Family
ID=5932872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19742458033 Ceased DE2458033B2 (en) | 1974-12-07 | 1974-12-07 | METHOD FOR PRODUCING A CAST IRON WITH VERMICULAR GRAPHITE |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2458033B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2937321A1 (en) * | 1979-02-16 | 1980-08-21 | Inst Cercetari Stiintifice | METHOD FOR PRODUCING CAST IRON WITH VERMICULLARGRAPHITE BY MEANS OF DOUBLE MODIFICATION |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227924A (en) * | 1978-05-18 | 1980-10-14 | Microalloying International, Inc. | Process for the production of vermicular cast iron |
| DE2926020A1 (en) * | 1979-06-28 | 1981-01-08 | Buderus Ag | METHOD FOR PRODUCING A CAST IRON WITH VERMICULAR GRAFIT AND USE OF THE CAST IRON |
| CH656147A5 (en) * | 1981-03-31 | 1986-06-13 | Fischer Ag Georg | METHOD FOR PRODUCING A CAST IRON WITH VERMICULAR GRAPHITE. |
| CH660027A5 (en) * | 1984-04-13 | 1987-03-13 | Fischer Ag Georg | METHOD AND MEANS FOR PRODUCTION OF A CAST IRON WITH VERMICULAR GRAPHITE. |
| CN110814304B (en) * | 2019-12-03 | 2023-06-16 | 西安瑞森金属复合材料有限公司 | Production method of vermicular cast iron |
-
1974
- 1974-12-07 DE DE19742458033 patent/DE2458033B2/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2937321A1 (en) * | 1979-02-16 | 1980-08-21 | Inst Cercetari Stiintifice | METHOD FOR PRODUCING CAST IRON WITH VERMICULLARGRAPHITE BY MEANS OF DOUBLE MODIFICATION |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2458033A1 (en) | 1976-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BGA | New person/name/address of the applicant | ||
| 8235 | Patent refused |