EP0074979A1 - Verfahren zur herstellung eines gusseisens mit vermiculargraphit und vorrichtung zur durchführung des verfahrens - Google Patents
Verfahren zur herstellung eines gusseisens mit vermiculargraphit und vorrichtung zur durchführung des verfahrensInfo
- Publication number
- EP0074979A1 EP0074979A1 EP82900930A EP82900930A EP0074979A1 EP 0074979 A1 EP0074979 A1 EP 0074979A1 EP 82900930 A EP82900930 A EP 82900930A EP 82900930 A EP82900930 A EP 82900930A EP 0074979 A1 EP0074979 A1 EP 0074979A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnesium
- cast iron
- melt
- content
- ratio
- 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- Withdrawn
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
- C21C1/08—Manufacture of 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
Definitions
- the invention relates to a method for producing a cast iron with vermicular graphite.
- Cast iron with vermicular graphite is a relatively new material between cast iron with lamellar graphite (GGL) and cast iron with spheroidal graphite (GGG). Due to its mechanical properties such as tensile strength, toughness and modulus of elasticity, as well as its thermal conductivity, the material GGV can be regarded as particularly suitable for e.g. diesel engine cylinder heads, steel mill molds and turbocharger housings, essentially wherever the parts are subjected to a non-shock-like temperature change. In this respect, GGV is superior to GGL. Compared to the material GGG, GGV has a high thermal conductivity and better casting properties. In particular, the decay effect of the magnesium in the treated cast iron melt is less pronounced, whereby a pouring time of more than 20 minutes can be achieved. The reduced tendency to blow holes and better machinability also speak in favor of GGV.
- the material GGV can be produced by treating the base melt with magnesium (Mg) or with calcium carbide (CaC 2 ) with a subsequent addition of titanium (Ti) or cerium mixed metal.
- CaC 2 desulphurization can be seen, for example, from DE-PS 1 911 024 and a titanium addition from DE-OS 15 33 279.
- Pure magnesium desulfurization has the advantage over CaC 2 desulfurization that the duration of the treatment can be reduced to about 1/5.
- a separate vessel with an insertion device for, for example, CaC 2 is unnecessary. It is also not advisable to add Ti, among other things because the titanium carbides formed are difficult to dissolve.
- the method according to the invention can dispense with the harmful addition of Ti.
- Treatment with pure magnesium is advantageously carried out in a pure magnesium converter, which from the DE-PS
- the weight of the cast iron to be treated, its S content, and the weight of the pure magnesium addition must be fairly accurate.
- the temperature in the converter should also be within a tolerance limit of at least ⁇ 20 ° C.
- the ratio of Mg: S in the range from 0.8-2.5, preferably from 1.2-2.0, is adjusted immediately before the start of casting by adding sulfur iron or Mg master alloy.
- the best results were obtained with a Mg: S ratio of about 1.8: 1.
- the optimal ratio of Mg: S must be determined in each foundry and checked at regular intervals.
- cerium in the form of mixed metal and / or other elements such as Al, Zr, Ca delays spherulitization in pure magnesium treatment and thus expands the area in which GGV forms.
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH2158/81 | 1981-03-03 | ||
| CH2158/81A CH656147A5 (de) | 1981-03-31 | 1981-03-31 | Verfahren zur herstellung eines gusseisens mit vermiculargraphit. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0074979A1 true EP0074979A1 (de) | 1983-03-30 |
Family
ID=4227235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP82900930A Withdrawn EP0074979A1 (de) | 1981-03-31 | 1982-03-30 | Verfahren zur herstellung eines gusseisens mit vermiculargraphit und vorrichtung zur durchführung des verfahrens |
Country Status (21)
| Country | Link |
|---|---|
| US (1) | US4544407A (xx) |
| EP (1) | EP0074979A1 (xx) |
| JP (1) | JPS58500446A (xx) |
| AU (1) | AU551524B2 (xx) |
| BR (1) | BR8207249A (xx) |
| CA (1) | CA1196500A (xx) |
| CH (1) | CH656147A5 (xx) |
| DD (1) | DD202186A5 (xx) |
| ES (1) | ES8304209A1 (xx) |
| GR (1) | GR75929B (xx) |
| HU (1) | HU186008B (xx) |
| IL (1) | IL65200A (xx) |
| IT (1) | IT1150690B (xx) |
| PH (1) | PH18386A (xx) |
| PL (1) | PL137396B1 (xx) |
| PT (1) | PT74590B (xx) |
| TR (1) | TR21435A (xx) |
| WO (1) | WO1982003410A1 (xx) |
| YU (1) | YU50382A (xx) |
| ZA (1) | ZA821797B (xx) |
| ZW (1) | ZW6482A1 (xx) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3321312A1 (de) * | 1983-06-13 | 1984-12-13 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Verfahren zur herstellung eines gusseisens mit vermiculargraphit |
| DE3321311A1 (de) * | 1983-06-13 | 1984-12-13 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Hochlegierter eisen-kohlenstoff-gusswerkstoff mit einem austenitischen grundgefuege |
| CH660027A5 (de) * | 1984-04-13 | 1987-03-13 | Fischer Ag Georg | Verfahren und mittel zur herstellung eines gusseisens mit vermiculargraphit. |
| CH665654A5 (de) * | 1985-02-14 | 1988-05-31 | Fischer Ag Georg | Verfahren zum freihalten von induktorrinnen, ein- und ausgusskanaelen und dergleichen von ablagerungen. |
| DE19942780A1 (de) * | 1999-09-08 | 2001-03-15 | Bruehl Eisenwerk | Zylinderkopf für eine Kolbenbrennkraftmaschine |
| SE529445C2 (sv) * | 2005-12-20 | 2007-08-14 | Novacast Technologies Ab | Process för framställning av kompaktgrafitjärn |
| JP6258336B2 (ja) * | 2013-09-06 | 2018-01-10 | 東芝機械株式会社 | 球状黒鉛鋳鉄の溶湯の球状化処理方法及び鋳造方法 |
| PL234793B1 (pl) * | 2017-06-24 | 2020-04-30 | Akademia Gorniczo Hutnicza Im Stanislawa Staszica W Krakowie | Sposób modyfikowania struktury pierwotnej żeliwa z grafitem wermikularnym na odlewy cienkościenne |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6606067A (xx) * | 1965-05-04 | 1966-11-07 | ||
| GB1069058A (en) * | 1965-05-04 | 1967-05-17 | Int Nickel Ltd | Cast iron |
| DE1815214C3 (de) * | 1968-01-26 | 1975-06-19 | Georg Fischer Ag, Schaffhausen (Schweiz) | 03.12.68 Schweiz 17961-68 Kippbares BehandlungsgefäB zum Behandeln von Metall-Schmelzen durch Einbringen verdampfbarer Zusätze, insbesondere zum Herstellen von Eisen-Kohlenstoff-GuBwerkstoffen mit Kugelgraphit durch Einbringen von Reinmagnesium in die im Gefäß enthaltene Schmelze Georg Fischer AG, Schaffhausen (Schweiz) |
| AT290592B (de) * | 1968-05-03 | 1971-06-11 | Ver Fuer Praktische Giessereif | Verfahren zur Herstellung eines Gußeisens mit Vermicular-Graphit |
| US3833361A (en) * | 1970-07-06 | 1974-09-03 | Kusaka Rare Metal Prod Co Ltd | Method for adding special elements to molten pig iron |
| CH549095A (de) * | 1971-03-31 | 1974-05-15 | Fischer Ag Georg | Verfahren und vorrichtung zur erzeugung von gusseisen mit kugelgraphit. |
| CH522459A (de) * | 1971-04-23 | 1972-06-30 | Fischer Ag Georg | Kippbarer Giessbehälter zur Behandlung einer Eisen-Kohlenstoffschmelze mit verdampfbaren Zusätzen |
| US3955973A (en) * | 1974-05-20 | 1976-05-11 | Deere & Company | Process of making nodular iron and after-treating alloy utilized therein |
| DE2458033B2 (de) * | 1974-12-07 | 1977-10-13 | Buderus'sche Eisenwerke, 6330 Wetzlar | Verfahren zur herstellung eines gusseisens mit vermikulargraphit |
| US3998625A (en) * | 1975-11-12 | 1976-12-21 | Jones & Laughlin Steel Corporation | Desulfurization method |
| US4094666A (en) * | 1977-05-24 | 1978-06-13 | Metal Research Corporation | Method for refining molten iron and steels |
| RO71368A2 (ro) * | 1979-02-16 | 1981-08-30 | Institutul De Cercetaresstiintifica,Inginerie Tehnologica Si Proiectare Pentru Sectoare Calde,Ro | Procedeu de elaborare a fontelor cu grafit vermicular prin dubla modificare |
| US4205981A (en) * | 1979-02-28 | 1980-06-03 | International Harvester Company | Method for ladle treatment of molten cast iron using sheathed magnesium wire |
| DE2926020A1 (de) * | 1979-06-28 | 1981-01-08 | Buderus Ag | Verfahren zur herstellung eines gusseisens mit vermicular-grafit und verwendung des gusseisens |
-
1981
- 1981-03-31 CH CH2158/81A patent/CH656147A5/de not_active IP Right Cessation
-
1982
- 1982-03-09 YU YU00503/82A patent/YU50382A/xx unknown
- 1982-03-09 IL IL65200A patent/IL65200A/xx unknown
- 1982-03-15 CA CA000398387A patent/CA1196500A/en not_active Expired
- 1982-03-16 IT IT20210/82A patent/IT1150690B/it active
- 1982-03-16 PH PH27006A patent/PH18386A/en unknown
- 1982-03-16 PT PT74590A patent/PT74590B/pt unknown
- 1982-03-17 ZA ZA821797A patent/ZA821797B/xx unknown
- 1982-03-23 GR GR67695A patent/GR75929B/el unknown
- 1982-03-25 TR TR21435A patent/TR21435A/xx unknown
- 1982-03-29 ZW ZW64/82A patent/ZW6482A1/xx unknown
- 1982-03-29 PL PL1982235701A patent/PL137396B1/pl unknown
- 1982-03-30 WO PCT/CH1982/000050 patent/WO1982003410A1/en not_active Application Discontinuation
- 1982-03-30 AU AU82703/82A patent/AU551524B2/en not_active Ceased
- 1982-03-30 DD DD82238559A patent/DD202186A5/de unknown
- 1982-03-30 ES ES510940A patent/ES8304209A1/es not_active Expired
- 1982-03-30 HU HU821225A patent/HU186008B/hu unknown
- 1982-03-30 JP JP57501033A patent/JPS58500446A/ja active Pending
- 1982-03-30 BR BR8207249A patent/BR8207249A/pt unknown
- 1982-03-30 US US06/449,008 patent/US4544407A/en not_active Expired - Fee Related
- 1982-03-30 EP EP82900930A patent/EP0074979A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8203410A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA821797B (en) | 1983-02-23 |
| JPS58500446A (ja) | 1983-03-24 |
| AU8270382A (en) | 1982-10-19 |
| PT74590A (en) | 1982-04-01 |
| IL65200A0 (en) | 1982-05-31 |
| CH656147A5 (de) | 1986-06-13 |
| PL137396B1 (en) | 1986-05-31 |
| YU50382A (en) | 1985-04-30 |
| PH18386A (en) | 1985-06-19 |
| ES510940A0 (es) | 1983-02-16 |
| IL65200A (en) | 1985-11-29 |
| BR8207249A (pt) | 1983-03-01 |
| AU551524B2 (en) | 1986-05-01 |
| WO1982003410A1 (en) | 1982-10-14 |
| IT8220210A0 (it) | 1982-03-16 |
| ES8304209A1 (es) | 1983-02-16 |
| IT1150690B (it) | 1986-12-17 |
| HU186008B (en) | 1985-05-28 |
| ZW6482A1 (en) | 1983-08-31 |
| PT74590B (en) | 1983-09-27 |
| PL235701A1 (en) | 1983-01-17 |
| DD202186A5 (de) | 1983-08-31 |
| GR75929B (xx) | 1984-08-02 |
| US4544407A (en) | 1985-10-01 |
| CA1196500A (en) | 1985-11-12 |
| TR21435A (tr) | 1984-06-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19821113 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19840817 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HOFFMANN, HORST Inventor name: BECKER, EMIL Inventor name: LINKERT, REINHOLD |