RU99114769A - METHOD FOR FORECASTING THE IRON MICROSTRUCTURE - Google Patents
METHOD FOR FORECASTING THE IRON MICROSTRUCTUREInfo
- Publication number
- RU99114769A RU99114769A RU99114769/28A RU99114769A RU99114769A RU 99114769 A RU99114769 A RU 99114769A RU 99114769/28 A RU99114769/28 A RU 99114769/28A RU 99114769 A RU99114769 A RU 99114769A RU 99114769 A RU99114769 A RU 99114769A
- Authority
- RU
- Russia
- Prior art keywords
- cup
- fesi
- cooling curve
- amount
- tellurium
- Prior art date
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims 26
- 229910052742 iron Inorganic materials 0.000 title claims 12
- 238000001816 cooling Methods 0.000 claims 31
- 229910005347 FeSi Inorganic materials 0.000 claims 24
- 229910052714 tellurium Inorganic materials 0.000 claims 18
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims 18
- 229910001018 Cast iron Inorganic materials 0.000 claims 14
- 238000004140 cleaning Methods 0.000 claims 12
- 239000003607 modifier Substances 0.000 claims 12
- 230000005496 eutectics Effects 0.000 claims 8
- 239000000155 melt Substances 0.000 claims 7
- 239000003795 chemical substances by application Substances 0.000 claims 6
- 238000005266 casting Methods 0.000 claims 5
- 230000000875 corresponding Effects 0.000 claims 4
- 229910001141 Ductile iron Inorganic materials 0.000 claims 3
- 229910001060 Gray iron Inorganic materials 0.000 claims 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 3
- 229910002804 graphite Inorganic materials 0.000 claims 3
- 239000010439 graphite Substances 0.000 claims 3
- 230000001276 controlling effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000005070 sampling Methods 0.000 claims 2
- -1 CGI Inorganic materials 0.000 claims 1
- 229910001126 Compacted graphite iron Inorganic materials 0.000 claims 1
- 229910001037 White iron Inorganic materials 0.000 claims 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 239000003054 catalyst Substances 0.000 claims 1
- 238000007531 graphite casting Methods 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 229910052761 rare earth metal Inorganic materials 0.000 claims 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims 1
- 229910052711 selenium Inorganic materials 0.000 claims 1
- 239000011669 selenium Substances 0.000 claims 1
- 238000007711 solidification Methods 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
Claims (10)
а) для выбранного способа литья определяют количество А нейтрализатора, причем упомянутый нейтрализатор выбирают из группы, включающей теллур, серу, бор и селен, в количестве А, достаточном для изменения состава пробы расплава чугуна в количестве W, первоначально имеющей состав, соответствующий серому чугуну для того, чтобы упомянутое количество W пробы упомянутого чугуна затвердевало в форме белого чугуна;
b) берут пробу чугуна в количестве W, микроструктура которого подлежит прогнозированию;
с) вводят пробу в количестве W, взятую во время операции b), в сосуд для пробы, содержащий нейтрализатор в количестве А, используемом во время операции а), а затем регистрируют кривую охлаждения в центре пробы;
d) определяют максимальную эвтектическую температуру (Те(max)) на кривой охлаждения, полученной во время операции с) и
е) прогнозируют с помощью использования информации, полученной во время операции d), будет ли затвердевать расплавленный чугун в виде чугуна с шаровидным графитом (SGI), чугуна с компактным графитом (CGI), чугуна с включениями пластинчатого графита или серого чугуна.1. A method for predicting the microstructure obtained by solidification of a particular molten iron, including the following operations:
a) for the selected casting method, the amount A of the converter is determined, said catalyst being selected from the group consisting of tellurium, sulfur, boron and selenium, in a quantity A sufficient to change the composition of the sample of molten iron in an amount of W, initially having a composition corresponding to gray cast iron for that said sample amount W of said cast iron solidifies in the form of white cast iron;
b) take a sample of cast iron in an amount of W, the microstructure of which is subject to prediction;
c) inject the sample in the amount of W taken during operation b) into the sample vessel containing the neutralizer in the amount of A used during operation a), and then record the cooling curve in the center of the sample;
d) determine the maximum eutectic temperature (T e (max)) on the cooling curve obtained during operation c) and
f) using the information obtained during operation d) is predicted whether the molten cast iron in the form of spheroidal graphite iron (SGI), compact graphite iron (CGI), cast iron with inclusions of lamellar graphite or gray cast iron will solidify.
f) вводят пробу расплавленного чугуна в FeSi-чашку и регистрируют кривую охлаждения в центре пробы;
g) вводят пробу расплавленного чугуна в чистую чашку и регистрируют кривую охлаждения в центре пробы;
h) определяют следующие параметры кривых охлаждения, полученных во время операций f) и g);
(i) рекалесценция кривой охлаждения, зарегистрированной в чистой чашке (ΔTno);
(ii) рекалесценция кривой охлаждения, зарегистрированной в теллуровой чашке (ΔTe);
(iii) рекалесценция кривой охлаждения, зарегистрированной в FeSi-чашке (ΔTFeSi);
(iv) максимальная эвтектическая температура кривой охлаждения, зарегистрированной в FeSi-чашке (TFeSi(max));
(v) максимальная эвтектическая температура кривой охлаждения, зарегистрированной в чистой чашке (Tno(max));
(vi) максимальная эвтектическая температура кривой охлаждения, зарегистрированной в теллуровой чашке (Те(max));
(vii) температура локального минимума кривой охлаждения, зарегистрированной в теллуровой чашке (Te(min));
(viii) температура локального минимума кривой охлаждения, зарегистрированной в чистой чашке (Tno(min));
(ix) температура локального минимума кривой охлаждения, зарегистрированной в FeSi-чашке TFeSi(min));
(х) наклон рекалесценции кривой, полученной в чистой чашке (Tno(slope));
(xi) наклон рекалесценции кривой, полученной в теллуровой чашке (Те(slope));
(xii) наклон рекалесценции кривой, полученной в FeSi-чашке TFeSi(slope)).5. The method according to any one of paragraphs. 1-4, in which:
f) inject a sample of molten iron into an FeSi plate and record the cooling curve in the center of the sample;
g) inject a sample of molten iron into a clean cup and record the cooling curve in the center of the sample;
h) determine the following parameters of the cooling curves obtained during operations f) and g);
(i) the realescence of the cooling curve recorded in a clean cup (ΔT no );
(ii) the realescence of the cooling curve recorded in the tellurium cup (ΔT e );
(iii) the recalcence of the cooling curve recorded in the FeSi plate (ΔT FeSi );
(iv) the maximum eutectic temperature of the cooling curve recorded in the FeSi plate (T FeSi (max));
(v) the maximum eutectic temperature of the cooling curve recorded in a clean cup (T no (max));
(vi) the maximum eutectic temperature of the cooling curve recorded in the tellurium cup (T e (max));
(vii) the temperature of the local minimum of the cooling curve recorded in the tellurium cup (T e (min));
(viii) the temperature of the local minimum of the cooling curve recorded in a clean cup (T no (min));
(ix) the temperature of the local minimum of the cooling curve recorded in the FeSi plate T FeSi (min));
(x) the slope of the recalescence curve obtained in a clean cup (T no (slope));
(xi) the slope of the recalescence curve obtained in the tellurium cup (T e (slope));
(xii) the slope of the recalescence curve obtained in the FeSi plate T FeSi (slope)).
а) выполняют способ прогнозирования в соответствии с любым из пп. 1-5;
b) используют информацию, полученную во время операции а) для расчета количества модификатора структуры, выбираемого из группы, включающей магний и редкоземельные элементы, который должен быть добавлен в расплавленный чугун для получения CGI;
с) вводят [модификатор] в количестве, рассчитанном во время операции b), в расплав чугуна; и
d) выполняют операцию отливки, преимущественно, известным способом.6. A method of obtaining a casting from CGI, in which:
a) perform the forecasting method in accordance with any of paragraphs. 1-5;
b) use the information obtained during operation a) to calculate the amount of a structure modifier selected from the group consisting of magnesium and rare earth elements that must be added to molten cast iron to obtain CGI;
c) introducing [modifier] in an amount calculated during operation b) into the molten iron; and
d) perform the casting operation, mainly, in a known manner.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9604478-9 | 1996-12-04 | ||
SE9704276-6 | 1997-11-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
RU99114769A true RU99114769A (en) | 2001-06-20 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2528569C2 (en) * | 2010-06-16 | 2014-09-20 | Сканиа Св Аб | Determination of amount of modifying agent to be added to iron melt |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2528569C2 (en) * | 2010-06-16 | 2014-09-20 | Сканиа Св Аб | Determination of amount of modifying agent to be added to iron melt |
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