SE462976B - PROCEDURES FOR PREPARATION OF PERLITIC CAST - Google Patents

PROCEDURES FOR PREPARATION OF PERLITIC CAST

Info

Publication number
SE462976B
SE462976B SE8701146A SE8701146A SE462976B SE 462976 B SE462976 B SE 462976B SE 8701146 A SE8701146 A SE 8701146A SE 8701146 A SE8701146 A SE 8701146A SE 462976 B SE462976 B SE 462976B
Authority
SE
Sweden
Prior art keywords
added
perlite
stabilizing element
perlite stabilizing
metallic
Prior art date
Application number
SE8701146A
Other languages
Swedish (sv)
Other versions
SE8701146L (en
SE8701146D0 (en
Inventor
I Henych
Original Assignee
Fischer Ag Georg
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 Fischer Ag Georg filed Critical Fischer Ag Georg
Publication of SE8701146D0 publication Critical patent/SE8701146D0/en
Publication of SE8701146L publication Critical patent/SE8701146L/en
Publication of SE462976B publication Critical patent/SE462976B/en

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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Continuous Casting (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Chemical Vapour Deposition (AREA)
  • Thin Magnetic Films (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Description

462 976 2 Förfarandet enligt denna uppfinning består däri, att man till- sätter minst ett perlitstabiliserande element i den mellan en gjutugns eller en gjutpannas utlopp och det inre av en gjut- form fortfarande i smält tillstånd förefintliga gjutjärnssmäl- tan. Företrädesvis genomföres tillsatsen av det perlitstabi- liserande elementet i gjutstrålen. Härigenom utsättes smält- nings- och gjutningsaggregaten icke för förorening med de per- litstabiliserande elementen. Eftersom det till ympningsmedlet tillsatta perlitstabiliserande elementet icke får belasta gjutstrålen termiskt i alltför stor grad, tillsättes i stället för koppar (Cu) tenn (Sn) eller antimon (Sb) i väsentligt mindre mängder än kopparmängderna. På detta sätt säkerställes att de tillsatta mängderna av ympmedel och perlitstabilise- rande element omedelbart och likformigt nedsmältes av gjut- strålen. Till detta bidrager även de lägre smälttemperatu- rerna och de lägre specifika värmevärdena för Sn och Sb i jäm- förelse med Cu. The method according to this invention consists in adding at least one perlite stabilizing element in the cast iron melt still present in a molten state between the outlet of a casting furnace or a casting pan and the interior of a mold. Preferably, the addition of the perlite stabilizing element in the casting jet is carried out. As a result, the melting and casting units are not exposed to contamination with the perlite stabilizing elements. Since the perlite stabilizing element added to the inoculant must not be subjected to too great a thermal load on the casting jet, tin (Sn) or antimony (Sb) are added in substantially smaller amounts than the copper amounts instead of copper. In this way it is ensured that the added amounts of inoculants and perlite stabilizing elements are immediately and uniformly melted down by the casting jet. The lower melting temperatures and the lower specific calorific values for Sn and Sb in comparison with Cu also contribute to this.

Exempel 1: För framställning av gjutjärnssorten med sfärisk grafit GGG 50 tillföres vanligen 0,3 % Cu såsom legeringsmedel för åstadkom- mande av den nödvändiga perlithalten. Förutsatt att Cu-halten i basjärnet (frân skrot) ligger under 0,1 % Cu erfordras för skillnaden av 0,2 % Cu en tillsats av endast ca 0,015 % Sn.Example 1: For the production of the cast iron type with spherical graphite GGG 50, 0.3% Cu is usually added as an alloying agent to obtain the necessary perlite content. Assuming that the Cu content in the base iron (from scrap) is below 0.1% Cu, the difference of 0.2% Cu requires an addition of only about 0.015% Sn.

Exempel 2: För framställning av gjutjärnssorten med sfärisk grafit GGG 60 inlegeras vanligen 0,5 till 0,7 % Cu. Under samma betingelser som enligt exempel l erfordras därefter ytterligare 0,4 till 0,6 %, i genomsnitt 0,5 % Cu, som ersättes med tillsats av ca 0,015 % Sb.Example 2: For the production of the cast iron type with spherical graphite GGG 60, 0.5 to 0.7% Cu is usually alloyed. Under the same conditions as in Example 1, an additional 0.4 to 0.6%, on average 0.5% Cu, is then required, which is replaced by the addition of about 0.015% Sb.

Tillsatsen av perlitstabiliserande element, exempelvis Sn och/eller Sb, kan bl a ske i form av pulver, tråd, i trådform bl a genom ommantling av pulvret med en metallisk eller icke- -metallisk ommantling. Sn resp. Sb kan tillsättas i kombina- 462 976 3 tion med ett ympmedel (bl a FeSi), exempelvis i form av en pulverblandning (genom inblåsning), såsom en legering, exem- pelvis i trådform, varvid pulverblandningen ommantlas med en metallisk eller icke-metallisk ommantling. Det pulverformiga ympmedlet kan vara ommantlat med en metallisk ommantling, på vars utsida eller insida Sn resp. Sb är påfört. Om tillsatsen genomföres i trådform, kan ommantlingen av det pulverformiga ympmedlet bestå av Sn resp. Sb. Tråden kan även vara inbäddad i det pulverformiga ympmedlet, varvid ommantlingen kan utgöras av ett metalliskt eller icke-metalliskt material. Tillsatsen av Sb är särskilt fördelaktig, eftersom koktemperaturen för Sb ligger vid l440°C, dvs. lägre än den vanliga temperaturen hos smältan före behandlingen. Härigenom kan returmaterialet av perlitiska sorter användas för de ferritiska sorterna av gjut- järn, eftersom eventuellt förefintliga Sb-rester förångas vid smältningsbehandlingen.The addition of perlite stabilizing elements, for example Sn and / or Sb, can take place in the form of powder, wire, in wire form, among other things by coating the powder with a metallic or non-metallic coating. Sn resp. Sb can be added in combination with a grafting agent (e.g. FeSi), for example in the form of a powder mixture (by blowing), such as an alloy, for example in wire form, the powder mixture being coated with a metallic or non-metallic casing. The powdered inoculum can be sheathed with a metallic sheath, on the outside or inside of Sn resp. Sb is applied. If the addition is carried out in wire form, the coating of the powdered inoculum may consist of Sn resp. Sb. The wire can also be embedded in the powdered inoculum, the sheath being made of a metallic or non-metallic material. The addition of Sb is particularly advantageous, since the boiling temperature of Sb is 1440 ° C, i.e. lower than the normal temperature of the melt before treatment. In this way, the return material of perlite varieties can be used for the ferritic varieties of cast iron, since any existing Sb residues are evaporated during the melting treatment.

En särskild fördel med det beskrivna förfarandet består i möj- ligheten att framställa ferritiska och perlitiska gjutjärns- sorter i samma smältugns- och gjutugnsanordning utan avbry- tande av produktionen på grund av fullständig tömning av detta aggregat. Härvid bortfaller de i det kända förfarandet inne- boende riskerna att de i det tillförda materialet kvarvarande resterna av perlitstabiliserande element inverkar oförmånligt på den efterföljande produktionen av ferritiskt gjutjärn.A particular advantage of the described process consists in the possibility of producing ferritic and perlite cast iron varieties in the same melting furnace and casting furnace device without interrupting production due to complete emptying of this unit. In this case, the risks inherent in the known process that the residues of perlite stabilizing elements remaining in the added material have an adverse effect on the subsequent production of ferritic cast iron are eliminated.

Tillsatsen av Sn resp. Sb med ympmedlet i den beskrivna tråd- formen till gjutstrålen är mycket fördelaktig, eftersom häri- genom en noggrann dosering av Sn resp. Sb säkerställas.The addition of Sn resp. Sb with the inoculum in the described wire form to the casting jet is very advantageous, since hereby an accurate dosing of Sn resp. Sb is ensured.

Claims (10)

462 976 PATENTKRAV462 976 PATENT REQUIREMENTS 1. l. Förfarande för framställning av perlitiska gjut- järnssorter, såsom GG, GGG och GGV, k ä n n e t e c k n a t därav, att minst ett perlitstabiliserande element tillsättes till gjutjärnssmältan, som fortfarande förefinnes i smält tillstånd mellan utloppet från en gjutugn eller en gjutpanna och det inre av en gjutform.1. A process for producing perlite cast iron varieties, such as GG, GGG and GGV, characterized in that at least one perlite stabilizing element is added to the cast iron melt, which is still present in the molten state between the outlet of a casting furnace or a casting pan and the interior of a mold. 2. Förfarande enligt patentkrav l, k ä n n e t e c k - n a t därav, att det perlitstabiliserande elementet tillsät- tes till gjutstrålen.2. A method according to claim 1, characterized in that the perlite stabilizing element is added to the casting jet. 3. Förfarande enligt patentkrav l eller 2, k ä n n e - t e c k n a t därav, att tenn (Sn) eller antimon (Sb) till- sättes såsom perlitstabiliserande element.3. A method according to claim 1 or 2, characterized in that tin (Sn) or antimony (Sb) is added as perlite stabilizing elements. 4. Förfarande enligt något av patentkraven l-3, k ä n - n e t e c k n a t därav, att det perlitstabiliserande elemen- tet tillsättes med ett ympmedel såsom en legering.4. A method according to any one of claims 1-3, characterized in that the perlite stabilizing element is added with a grafting agent such as an alloy. 5. Förfarande enligt något av patentkraven l-3, k ä n - n e t e c k n a t därav, att det perlitstabiliserande elemen- tet tillsättes såsom tråd eller såsom pulver.5. A method according to any one of claims 1-3, characterized in that the perlite stabilizing element is added as wire or as powder. 6. Förfarande enligt patentkrav 5, k ä n n e t e c k - n a t därav, att det perlitstabiliserande elementet tillsät- tes i trådform såsom pulver ommantlat med en icke-metallisk ommantling.6. A method according to claim 5, characterized in that the perlite stabilizing element is added in wire form as a powder coated with a non-metallic coating. 7. Förfarande enligt patentkrav 6, k ä n n e t e c k - n a t därav, att det perlitstabiliserande elementet och ymp- 4 medlet tillsättes i trådform såsom pulver ommantlat med en icke-metallisk ommantling.7. A method according to claim 6, characterized in that the perlite stabilizing element and the inoculum are added in wire form as a powder coated with a non-metallic coating. 8. Förfarande enligt något av patentkraven l-3, k ä n - n e t e c k n a t därav, att det perlitstabiliserande elemen- 462 976 tet tillsättes i form av en ommantling av ett pulverformigt ympmedel.8. A method according to any one of claims 1-3, characterized in that the perlite stabilizing element 462 976 is added in the form of a sheath of a powdered inoculant. 9. Förfarande enligt något av patentkraven l-3, k ä n - n e t e c k n a t därav, att det perlitstabiliserande elemen- tet tillsättes såsom ett skikt påfört på den yttre eller inre ytan av en metallisk ommantling av ett pulverformigt ympmedel.9. A method according to any one of claims 1-3, characterized in that the perlite stabilizing element is added as a layer applied to the outer or inner surface of a metallic sheath of a powdered grafting agent. 10. Förfarande enligt något av patentkraven 1-3, 5 och 6, k ä n n e t e c k n a t därav, att det perlitstabilise- rande elementet tillsättes såsom tråd inbäddad i pulverfor- migt, med en icke-metallisk ommantling ommantlat ympmedel.10. A method according to any one of claims 1-3, 5 and 6, characterized in that the perlite stabilizing element is added as wire embedded in powdered, with a non-metallic sheathed grafting agent.
SE8701146A 1986-03-20 1987-03-19 PROCEDURES FOR PREPARATION OF PERLITIC CAST SE462976B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1131/86A CH665851A5 (en) 1986-03-20 1986-03-20 METHOD FOR PRODUCING PERLITIC CAST IRON TYPES.

Publications (3)

Publication Number Publication Date
SE8701146D0 SE8701146D0 (en) 1987-03-19
SE8701146L SE8701146L (en) 1987-09-21
SE462976B true SE462976B (en) 1990-09-24

Family

ID=4203222

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8701146A SE462976B (en) 1986-03-20 1987-03-19 PROCEDURES FOR PREPARATION OF PERLITIC CAST

Country Status (20)

Country Link
JP (1) JPS62230926A (en)
KR (1) KR910001353B1 (en)
CN (1) CN1005994B (en)
AT (1) AT398984B (en)
AU (1) AU594439B2 (en)
CH (1) CH665851A5 (en)
DD (1) DD259001A5 (en)
DE (1) DE3706901A1 (en)
ES (1) ES2002591A6 (en)
FI (1) FI85507C (en)
FR (1) FR2601039B1 (en)
GB (1) GB2187985B (en)
IN (1) IN168111B (en)
IT (1) IT1204930B (en)
NO (1) NO871116L (en)
NZ (1) NZ219725A (en)
PL (1) PL264592A1 (en)
SE (1) SE462976B (en)
YU (1) YU41487A (en)
ZA (1) ZA871685B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6973954B2 (en) * 2001-12-20 2005-12-13 International Engine Intellectual Property Company, Llc Method for manufacture of gray cast iron for crankcases and cylinder heads
NO20045611D0 (en) * 2004-12-23 2004-12-23 Elkem Materials Modifying agents for cast iron
CN102296226A (en) * 2011-07-28 2011-12-28 徐州胜海机械制造科技有限公司 Post inoculant for large-scale ductile iron casting and manufacture method thereof
CN102936679A (en) * 2012-11-22 2013-02-20 宁夏共享集团有限责任公司 Gray cast iron electric-furnace smelting method
CN106676250A (en) * 2016-12-15 2017-05-17 广西大学 Thermal treatment method for chilled cast iron roll
CN112962018B (en) * 2021-01-29 2022-04-01 宁波日星铸业有限公司 Chilling process manufacturing method of non-label QT600-7 nodular cast iron

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Also Published As

Publication number Publication date
FI85507B (en) 1992-01-15
YU41487A (en) 1990-02-28
GB8704816D0 (en) 1987-04-08
SE8701146L (en) 1987-09-21
DE3706901C2 (en) 1989-02-16
NO871116L (en) 1987-09-21
IN168111B (en) 1991-02-09
AU7042487A (en) 1987-09-24
AT398984B (en) 1995-02-27
KR870009036A (en) 1987-10-22
GB2187985A (en) 1987-09-23
JPS62230926A (en) 1987-10-09
NO871116D0 (en) 1987-03-18
SE8701146D0 (en) 1987-03-19
CH665851A5 (en) 1988-06-15
FI871214A0 (en) 1987-03-19
FR2601039B1 (en) 1992-12-31
FI85507C (en) 1992-04-27
ATA49787A (en) 1994-07-15
PL264592A1 (en) 1988-02-04
IT8719681A0 (en) 1987-03-13
NZ219725A (en) 1990-03-27
ES2002591A6 (en) 1988-08-16
FR2601039A1 (en) 1988-01-08
KR910001353B1 (en) 1991-03-04
DE3706901A1 (en) 1987-10-01
ZA871685B (en) 1987-08-31
GB2187985B (en) 1990-12-12
CN1005994B (en) 1989-12-06
DD259001A5 (en) 1988-08-10
AU594439B2 (en) 1990-03-08
IT1204930B (en) 1989-03-10
CN87102216A (en) 1987-09-30
FI871214L (en) 1987-09-21

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