EP2920335B1 - Alliage inoculant pour pièces épaisses en fonte - Google Patents
Alliage inoculant pour pièces épaisses en fonte Download PDFInfo
- Publication number
- EP2920335B1 EP2920335B1 EP13801650.6A EP13801650A EP2920335B1 EP 2920335 B1 EP2920335 B1 EP 2920335B1 EP 13801650 A EP13801650 A EP 13801650A EP 2920335 B1 EP2920335 B1 EP 2920335B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- inoculant
- antimony
- cast iron
- rare earths
- 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.)
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- 229910045601 alloy Inorganic materials 0.000 title claims description 81
- 239000000956 alloy Substances 0.000 title claims description 81
- 229910001018 Cast iron Inorganic materials 0.000 title claims description 56
- 239000002054 inoculum Substances 0.000 title claims description 46
- 229910052787 antimony Inorganic materials 0.000 claims description 65
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 61
- 238000011282 treatment Methods 0.000 claims description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 25
- 239000011575 calcium Substances 0.000 claims description 16
- 229910052791 calcium Inorganic materials 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 8
- 229910052746 lanthanum Inorganic materials 0.000 claims description 8
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 229910052788 barium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
- 229910052726 zirconium Inorganic materials 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 39
- 239000010439 graphite Substances 0.000 description 31
- 229910002804 graphite Inorganic materials 0.000 description 31
- 238000011081 inoculation Methods 0.000 description 27
- 239000007788 liquid Substances 0.000 description 17
- 238000007792 addition Methods 0.000 description 16
- 239000000203 mixture Substances 0.000 description 15
- 239000002245 particle Substances 0.000 description 15
- 229910000805 Pig iron Inorganic materials 0.000 description 12
- 230000007547 defect Effects 0.000 description 12
- 230000006698 induction Effects 0.000 description 11
- 239000011777 magnesium Substances 0.000 description 11
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 10
- 239000010451 perlite Substances 0.000 description 10
- 235000019362 perlite Nutrition 0.000 description 10
- 229910052749 magnesium Inorganic materials 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 229910052797 bismuth Inorganic materials 0.000 description 7
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910001567 cementite Inorganic materials 0.000 description 5
- 229910005347 FeSi Inorganic materials 0.000 description 3
- 238000005562 fading Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910001060 Gray iron Inorganic materials 0.000 description 2
- 229910001037 White iron Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910021346 calcium silicide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- -1 iron carbides Chemical class 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000012809 post-inoculation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
-
- 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
- C21C1/08—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
-
- 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
- C22C28/00—Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/18—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on silicides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0242—Making ferrous alloys by powder metallurgy using the impregnating technique
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
-
- 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
Definitions
- the present invention relates to an inoculating alloy for the treatment of cast iron.
- Cast iron is a well-known iron-carbon alloy widely used for the manufacture of mechanical parts. Cast iron is obtained by mixing the constituents of the alloy in the liquid state at a temperature between 1320 and 1450 ° C before casting in a mold and cooling the alloy obtained.
- the carbon can adopt several physicochemical structures depending on several parameters.
- White cast iron has the characteristic of being hard and brittle, which is undesirable for certain applications.
- gray cast iron If carbon appears as graphite, the resulting cast iron is called gray cast iron. Gray cast iron is softer and can be worked.
- the liquid cast iron undergoes an inoculation treatment aimed at introducing into the cast iron graphitizing components or graphitization supports commonly called germs which will promote, during the cooling of the cast iron in the mold, the appearance of graphite. rather than iron carbide.
- the components of an inoculant are therefore elements favoring the formation of graphite and the decomposition of iron carbide during the solidification of the cast iron.
- an inoculant can be designed to perform other functions and to this end include other components having an effect particular. Cast iron can also undergo additional prior or subsequent treatments.
- the graphite formed may therefore be desired, depending on the properties sought, for the graphite formed to be spheroidal, vermicular or lamellar.
- Either graphitic form can be obtained preferentially by a particular treatment of the cast iron using specific components.
- spheroidal graphite can be favored by a so-called nodulating treatment aiming mainly at bringing to the melting of magnesium in an amount sufficient for the graphite to be able to grow so as to form round particles (spheroids or nodules).
- nodulizing components are generally added in the form of a specific alloy (nodulizing alloy) prior to the inoculating treatment of the cast iron during a particular treatment.
- the nodulating alloy essentially makes it possible to influence the shape of the graphite nodules, while the inoculating product aims to increase the number of these nodules and to homogenize the graphitic structures.
- These treatments can be carried out in one or more stages and at different times during the production of the cast iron.
- inoculants are conventionally manufactured from a ferro-silicon alloy of the FeSi 45 , FeSi 65 or FeSi 75 type with adjustment of the chemistry according to the targeted composition of the inoculant. It can also be mixtures of several alloys.
- the inoculation efficiency of the cast iron part also depends on its thickness (or else on the speed of solidification).
- cooling will be slower (2 to 4 hours) and will favor the formation of graphite.
- the addition of pure antimony into the liquid metal poses problems of precision because the rate of introduction is very low (of the order of 10 to 30 g per ton of liquid pig iron).
- the addition yield of pure antimony is between 50 and 80% and the useful amount introduced is therefore difficult to control.
- antimony will tend to greatly increase the proportion of perlite, an undesired phase in ferritic structures.
- the founder In the case of addition of pure antimony, the founder must also combine Rare Earths (abbreviated as TR or RE for “Rare Earths”) in order to obtain a maximum improvement in the shape of the graphite. Likewise, if the quantity of Rare Earths is insufficient, the part will present a graphite defect of type "spiky". Conversely, if the quantity of Rare Earth is too strongly dosed, the graphite defect will be rather of the “chunky” type, which occurs mainly when the raw materials used are relatively pure
- Such an inoculant according to these documents for thin parts comprises in particular an inoculating alloy based on ferro-silicon and comprising between 0.005 and 3% by mass of Rare Earths, in particular Lanthanum, as well as between 0.005 and 3% by mass of bismuth, lead or antimony in a ratio (Bismuth + Lead + Antimony) / Rare Earth between 0.9 and 2.2; bismuth being particularly preferred, the descriptions of these documents relating only to bismuth.
- the document WO2006 / 068487A1 describes an inoculant comprising a phase modifier component (inoculating function) associated with an agent for modifying the structure of graphite which may be antimony.
- a phase modifier component inoculating function
- an agent for modifying the structure of graphite which may be antimony.
- this structural modification agent is used in mixture with the inoculating compound (ferrosilicon) and not in alloyed form.
- Antimony is furthermore clearly mentioned as being a promoter of perlite, a phase which, as mentioned previously, is generally not desired.
- the amount of antimony used is between 3 and 15%, which corresponds to a significant amount probably responsible for the proportion of perlite formed.
- JP2200718A describes an inoculant consisting of a mixture of ferrosilicon, antimony, calcium silicide and rare earths. Antimony is not used in an alloyed form.
- JP57067146A describes an alloy based on ferrosilicon comprising between 5 and 50% by mass of antimony and up to 10% of rare earths. In addition to the high proportion of antimony, this alloy is used as a perlite inhibitor, not as an inoculant.
- the present invention provides inoculating alloys according to claim 1 and claim 2.
- the introduction of antimony in the form of an alloy makes it possible to achieve a high yield of use of the antimony, of the order of 97 to 99%.
- the useful quantity introduced is therefore much more precisely known.
- the increase in yield thus saves products and simplifies the management of product additions, including for rare earths.
- an alloy according to the invention makes it possible to limit the gaseous evolution of antimony between 0.1 and 0.2 mg / m 3 and the use of a respirator mask is no longer necessary.
- antimony and rare earths significantly prolongs the time of antimony fading. The effect produced therefore lasts longer in the complete foundry process. It will be noted that the fading time of antimony is even greater than the fading time of bismuth in inoculating alloys for thin parts.
- the alloy according to the present application when added in a pouch or in the oven, can thus make it possible to replace or even eliminate an additional inoculation with a jet or late.
- the alloy according to the present application also makes it possible in particular to greatly limit or even avoid the formation of defects in “chunky” or “spiky” type graphite, but also to improve the shape of the graphite by ensuring a nodularity greater than 95% while bringing the spheroids closer to the perfect sphere.
- the alloy according to the present application thus ensures a ferrite / perlite matrix which is homogeneous according to the different thicknesses of the part produced, which in particular improves the conditions for subsequent machining of the part.
- the antimony to rare earths ratio is between 0.9 and 2.2.
- the Antimony to Rare Earths ratio will be greater than 1.4, preferably 1.6, and less than 2.5; preferably less than 2.
- the proportion by mass of antimony is greater than 0.3%, preferably greater than 0.5%, more preferably still greater than 0.8%.
- the proportion by mass of antimony is less than 1.5%, preferably less than 1.3%.
- the rare earths comprise lanthanum, preferably only lanthanum.
- the proportion by mass of rare earths is greater than 0.2%, preferably greater than 0.3%.
- the proportion by mass of rare earths is less than 1.2%, preferably less than 1%.
- the present invention also relates to the use of the inoculant according to the invention.
- said inoculant is introduced in the form of powder.
- said inoculant is introduced in the form of a solid insert placed in a casting mold.
- the use of the inoculant according to the invention relates to the manufacture of cast iron parts having parts of thickness greater than 6 mm, preferably parts of thickness greater than 20mm, and even more preferably parts of thickness greater than 50mm.
- the inoculant according to the invention will be used in the context of an inoculation of a cast iron bath. It can also be used as a precondition for said cast iron as well as as a nodulizer if necessary.
- the composition of an inoculating alloy according to the invention comprises: Inoculating alloy - composition 1 Element Quantity (% mass) Yes 45 - 80 It 0.5 - 4 al 0.5 - 3 Sb 0.2 - 2 Rare Earths (especially Lanthanum) 0.2 - 3 Iron Balance
- the inoculant may also include additional elements providing specific effects depending on the desired properties. This could be more particularly the case in the context of a pre-conditioning treatment of cast iron.
- Another inoculating alloy according to the invention has the following composition: Inoculating alloy - composition 2 Element Quantity (% mass) Yes 45 - 80 It 0.5 - 8 al 0.5 - 3 Sb 0.2 - 2 Rare Earths (especially Lanthanum) 0.2 - 3 Ba 2 - 15 mn 2 - 6 Zr 2 - 6 Iron Balance
- the particle size of the inoculant according to the invention may be adapted according to its methods of addition.
- the inoculating alloy can also be successfully added as an inoculant before filling the casting mold or in bag or late inoculation, after adjusting the chemistry of the alloy (in particular Ba between 1.5 and 5% mass and Ca between 0.5 and 2% mass).
- the composition of the alloy could be as follows: Nodulating alloy with inoculating effect - composition 3 Element Quantity (% mass) Yes 30 - 60 It 0.2 - 5 al 0.2 - 3 Sb 0.1 - 2 Rare Earths (especially Lanthanum) 0.1 - 3 mg 3 - 12 Iron Balance
- the granulometry of the nodulizer (in particular with inoculating function) will be adapted according to the size of the treatment bags. For example, for pockets of 100 to 500 kg of cast iron, we will prefer a particle size between approximately 0.4 and approximately 2 mm, or even up to 7 mm. For pockets of 500 to 1000kg of cast iron, we will prefer a particle size between approximately 2 and approximately 7mm, or between approximately 10 and approximately 30mm. For pockets of more than 1000kg of cast iron, we will prefer a particle size between about 10 and about 30mm.
- Example 1 (outside the invention): Foundry A - 8 mm thick part.
- liquid pig iron was treated by adding 30 g of antimony to one tonne of liquid pig iron in the induction furnace of pure antimony.
- the cast iron was then subjected to a nodulization treatment using a nodulizing alloy of the FeSiMg type comprising a third of an FeSiMg alloy comprising 2% of rare earths and two thirds of a FeSiMg alloy comprising no rare earths.
- the cast iron underwent an inoculation treatment by adding 0.1% by mass of a FeSiMnZr alloy and 0.1% of a FeSiAl alloy to the casting basin, the inoculating alloys being added in the form of insert inoculating in the mold.
- the step of adding pure antimony was eliminated and the nodulating treatment was simplified by using only the nodulating alloy FeSiMg not containing rare earths.
- Foundry A treated with an inoculant according to the present application has shown an increase in elongation in tension on test specimens for a grade EN-GJS-400-15.
- Example 2 (outside the invention): Foundry B - 200 mm thick part.
- liquid pig iron was treated by adding 20 g of antimony to one tonne of liquid pig iron in the induction furnace of pure antimony.
- the cast iron was then subjected to a nodulization treatment using a nodulizing alloy of the FeSiMg type comprising 1% by mass of rare earths and introduced into the cast iron in the form of a cored wire.
- the cast iron underwent an inoculation treatment by adding 0.15% by mass of a FeSiBiTR alloy to the casting basin.
- the step of adding pure antimony was eliminated and the nodulating treatment was simplified by using only a nodulating alloy FeSiMg not containing rare earths (also introduced in the form of cored wire).
- Example 3 foundry C - thin parts (thickness less than 6mm).
- liquid pig iron was treated by adding 25 g of antimony to one tonne of liquid pig iron in the induction furnace of pure antimony.
- the cast iron was then subjected to a nodulization treatment using a nodulizing alloy of the FeSiMg type comprising 6.7% by mass of magnesium as well as 1.2% of calcium and 0.98% of rare earths.
- the cast iron underwent a late inoculation treatment by adding 0.12% by mass of an FeSiMnZrBa alloy having a particle size between 0.2 and 5 mm.
- a nodulating alloy with inoculating function according to composition 3 mentioned above was used.
- the step of adding pure antimony has been omitted.
- the nodulating treatment was carried out using an alloy of the FeSiMg type according to composition 3 of the present application and comprising 6.4% by mass of magnesium as well as 1.3% of calcium, 0.6% of antimony and 1.2% rare earths.
- a complementary inoculation was carried out according to a late inoculation method with 0.09% of an FeSiAlCa alloy and 0.009% of an FeSiMnZrBa alloy.
- the additional inoculation could be done using a more economical inoculant of the FeSiAlCa type.
- Example 4 foundry D - massive parts.
- liquid pig iron was treated by adding 30 g of antimony to one tonne of liquid pig iron in the induction furnace of pure antimony.
- the cast iron was then subjected to a nodulization treatment using a nodulizing alloy of the FeSiMg type comprising 9.1% by mass of magnesium as well as 1.4% of calcium and 1.1% of rare earths.
- the cast iron underwent an inoculation treatment by adding an insert of 10 kg per tonne of cast iron of an inoculating alloy FeSiMnZr.
- the step of adding pure antimony has been omitted.
- the nodulating treatment was carried out using the same alloy as for the reference, namely using a nodulating alloy of the FeSiMg type comprising 9.1% by mass of magnesium as well as 1.4% of calcium and 1.1%. of rare earths.
- Cast iron D makes it possible to develop a shade of dark EN-GJS-400-18-LT used in particular in the wind power sector.
- the use of the inoculant D2 made it possible to significantly increase the impact resistance.
- Example 5 foundry E - thin parts and nodulating treatment.
- the liquid pig iron underwent a nodulization treatment using a nodulizing alloy of the FeSiMg type comprising 9.1% by mass of magnesium as well as 0.8% of bismuth and 0.7% of rare earths.
- the cast iron was then subjected to an inoculation treatment according to a late inoculation method by adding 0.18% of an FeSiMnZr alloy having a particle size between 0.2 and 5 mm.
- a nodulating alloy according to composition 3 mentioned above was used.
- the alloy used is an FeSiMg type alloy comprising 9.1% magnesium as well as 0.75% antimony and 0.5% rare earths.
- the cast iron was then subjected to an additional inoculation treatment according to a late inoculation method by adding 0.17% of an FeSiMnZr alloy having a particle size between 0.2 and 5 mm.
- Example 6 (outside the invention): Foundry D on massive parts.
- the foundry reference (F1) and the test (F2) using an inoculating alloy were carried out in accordance with Example 4 and the foundry D by inoculating massive parts.
- Example 7 (outside the invention): Foundry D on massive parts.
- the foundry reference (G1) and the test (G2) using an inoculating alloy were carried out in accordance with Example 4 and the foundry D by inoculating massive parts.
- Example 8 foundry H - part 150 mm thick.
- liquid pig iron was treated by adding 15 g of antimony to one tonne of liquid pig iron in the induction furnace of pure antimony.
- the cast iron was then subjected to a nodulization treatment using a nodulating cored wire (diameter 13 mm, 32% of Mg, 1.2% of TR, 230 g / m of powder)
- the cast iron underwent a late inoculation treatment by adding 0.15% by mass of a FeSiMnZr alloy to the casting jet.
- the step of adding pure antimony was eliminated and the nodulating treatment was simplified by using only a nodulating alloy FeSiMg not containing rare earths (also introduced in the form of cored wire).
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical 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)
- Hard Magnetic Materials (AREA)
Priority Applications (2)
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PL13801650T PL2920335T3 (pl) | 2012-11-14 | 2013-11-12 | Modyfikator stopu dla grubych części żeliwa |
SI201331674T SI2920335T1 (sl) | 2012-11-14 | 2013-11-12 | Zlitina za cepljenje za debele kose iz železove litine |
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FR1260817A FR2997962B1 (fr) | 2012-11-14 | 2012-11-14 | Alliage inoculant pour pieces epaisses en fonte |
PCT/FR2013/052710 WO2014076404A1 (fr) | 2012-11-14 | 2013-11-12 | Alliage inoculant pour pièces épaisses en fonte |
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EP2920335B1 true EP2920335B1 (fr) | 2019-12-18 |
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EP13801650.6A Active EP2920335B1 (fr) | 2012-11-14 | 2013-11-12 | Alliage inoculant pour pièces épaisses en fonte |
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US (1) | US20150284830A1 (ko) |
EP (1) | EP2920335B1 (ko) |
JP (1) | JP2016503460A (ko) |
KR (1) | KR20150083998A (ko) |
CN (1) | CN104812922A (ko) |
BR (1) | BR112015010975A2 (ko) |
CA (1) | CA2889124C (ko) |
DK (1) | DK2920335T3 (ko) |
ES (1) | ES2777934T3 (ko) |
FR (1) | FR2997962B1 (ko) |
MX (1) | MX2015006053A (ko) |
PL (1) | PL2920335T3 (ko) |
PT (1) | PT2920335T (ko) |
SI (1) | SI2920335T1 (ko) |
UA (1) | UA116218C2 (ko) |
WO (1) | WO2014076404A1 (ko) |
ZA (1) | ZA201503205B (ko) |
Families Citing this family (16)
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KR101708583B1 (ko) * | 2013-09-06 | 2017-02-20 | 도시바 기카이 가부시키가이샤 | 구상 흑연 주철의 용탕의 구상화 처리 방법 |
WO2016186094A1 (ja) * | 2015-05-18 | 2016-11-24 | 東芝機械株式会社 | 鋳鉄溶湯処理方法 |
CN105039631A (zh) * | 2015-08-20 | 2015-11-11 | 合肥市田源精铸有限公司 | 一种含稀土的孕育剂以及在球墨铸铁冶炼中的应用 |
US10662510B2 (en) | 2016-04-29 | 2020-05-26 | General Electric Company | Ductile iron composition and process of forming a ductile iron component |
US10787726B2 (en) | 2016-04-29 | 2020-09-29 | General Electric Company | Ductile iron composition and process of forming a ductile iron component |
NO347571B1 (en) * | 2016-06-30 | 2024-01-15 | Elkem Materials | Cast Iron Inoculant and Method for Production of Cast Iron Inoculant |
NO20161094A1 (en) | 2016-06-30 | 2018-01-01 | Elkem As | Cast Iron Inoculant and Method for Production of Cast Iron Inoculant |
NO20172063A1 (en) | 2017-12-29 | 2019-07-01 | Elkem Materials | Cast iron inoculant and method for production of cast iron inoculant |
NO20172061A1 (en) | 2017-12-29 | 2019-07-01 | Elkem Materials | Cast iron inoculant and method for production of cast iron inoculant |
NO20172064A1 (en) | 2017-12-29 | 2019-07-01 | Elkem Materials | Cast iron inoculant and method for production of cast iron inoculant |
NO20172065A1 (en) * | 2017-12-29 | 2019-07-01 | Elkem Materials | Cast iron inoculant and method for production of cast iron inoculant |
NO346252B1 (en) | 2017-12-29 | 2022-05-09 | Elkem Materials | Cast iron inoculant and method for production of cast iron inoculant |
CN111809103A (zh) * | 2020-07-21 | 2020-10-23 | 常州钜苓铸造有限公司 | 大功率风电超高强高韧低温球墨铸铁的制备方法 |
CN116848278A (zh) * | 2021-03-24 | 2023-10-03 | 株式会社博迈立铖 | 球墨铸铁、球墨铸铁的制造方法及球化处理剂 |
CN115029495A (zh) * | 2022-06-15 | 2022-09-09 | 宜昌佳晟鑫铁合金有限公司 | 一种珠光体孕育剂配方 |
CN115896604A (zh) * | 2022-11-15 | 2023-04-04 | 宜昌佳晟鑫铁合金有限公司 | 一种硅基孕育剂材料配比方法 |
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JPS5943843A (ja) * | 1982-09-06 | 1984-03-12 | Kusaka Reametaru Kenkyusho:Kk | 添加合金 |
CN102002548A (zh) * | 2010-12-07 | 2011-04-06 | 哈尔滨工业大学 | 一种厚大断面球墨铸铁球化剂 |
Family Cites Families (13)
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JPS5767146A (en) | 1980-10-11 | 1982-04-23 | Osaka Tokushu Gokin Kk | Introduction method for antimony into cast iron |
FR2511044A1 (fr) * | 1981-08-04 | 1983-02-11 | Nobel Bozel | Ferro-alliage pour le traitement d'inoculation des fontes a graphite spheroidal |
US4666516A (en) * | 1986-01-21 | 1987-05-19 | Elkem Metals Company | Gray cast iron inoculant |
JPH02200718A (ja) | 1989-01-31 | 1990-08-09 | Kiriyuu Kikai Kk | 球状黒鉛ニレジスト鋳鉄の製造方法 |
NO179079C (no) * | 1994-03-09 | 1996-07-31 | Elkem As | Ympemiddel for stöpejern og fremgangsmåte for fremstilling av ympemiddel |
JPH08188812A (ja) * | 1995-01-10 | 1996-07-23 | Japan Trading Service:Kk | 高強度ダクタイル鋳鉄の製造方法 |
FR2750143B1 (fr) | 1996-06-25 | 1998-08-14 | Pechiney Electrometallurgie | Ferroalliage pour l'inoculation des fontes a graphite spheroidal |
FR2839082B1 (fr) * | 2002-04-29 | 2004-06-04 | Pechiney Electrometallurgie | Alliage inoculant anti microretassure pour traitement des fontes de moulage |
FR2855186B1 (fr) * | 2003-05-20 | 2005-06-24 | Pechiney Electrometallurgie | Produits inoculants contenant du bismuth et des terres rares |
KR20050011067A (ko) * | 2003-07-21 | 2005-01-29 | 삼성전자주식회사 | 2:2 풀다운 시퀀스 판별장치 및 그 방법 |
US20060011305A1 (en) * | 2003-09-19 | 2006-01-19 | Donald Sandell | Automated seal applicator |
NO20045611D0 (no) * | 2004-12-23 | 2004-12-23 | Elkem Materials | Modifying agents for cast iron |
JP4974591B2 (ja) * | 2005-12-07 | 2012-07-11 | 旭テック株式会社 | 黒鉛球状化剤およびこれを用いた球状黒鉛鋳鉄の製造方法 |
-
2012
- 2012-11-14 FR FR1260817A patent/FR2997962B1/fr active Active
-
2013
- 2013-11-12 CA CA2889124A patent/CA2889124C/fr active Active
- 2013-11-12 JP JP2015542331A patent/JP2016503460A/ja active Pending
- 2013-11-12 CN CN201380059199.9A patent/CN104812922A/zh active Pending
- 2013-11-12 EP EP13801650.6A patent/EP2920335B1/fr active Active
- 2013-11-12 PL PL13801650T patent/PL2920335T3/pl unknown
- 2013-11-12 PT PT138016506T patent/PT2920335T/pt unknown
- 2013-11-12 KR KR1020157011457A patent/KR20150083998A/ko not_active Application Discontinuation
- 2013-11-12 UA UAA201505800A patent/UA116218C2/uk unknown
- 2013-11-12 MX MX2015006053A patent/MX2015006053A/es unknown
- 2013-11-12 ES ES13801650T patent/ES2777934T3/es active Active
- 2013-11-12 DK DK13801650.6T patent/DK2920335T3/da active
- 2013-11-12 WO PCT/FR2013/052710 patent/WO2014076404A1/fr active Application Filing
- 2013-11-12 BR BR112015010975A patent/BR112015010975A2/pt not_active Application Discontinuation
- 2013-11-12 SI SI201331674T patent/SI2920335T1/sl unknown
- 2013-11-12 US US14/441,761 patent/US20150284830A1/en not_active Abandoned
-
2015
- 2015-05-08 ZA ZA2015/03205A patent/ZA201503205B/en unknown
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JPS5943843A (ja) * | 1982-09-06 | 1984-03-12 | Kusaka Reametaru Kenkyusho:Kk | 添加合金 |
CN102002548A (zh) * | 2010-12-07 | 2011-04-06 | 哈尔滨工业大学 | 一种厚大断面球墨铸铁球化剂 |
Non-Patent Citations (1)
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ISSUE DIS: "Effect of Bismuth in Ductile iron", DUCTILE IRON SOCIETY, 1 January 2006 (2006-01-01), XP055480379, Retrieved from the Internet <URL:http://www.ductile.org/wp-content/hottopics/2006ht07.pdf> [retrieved on 20180531] * |
Also Published As
Publication number | Publication date |
---|---|
WO2014076404A1 (fr) | 2014-05-22 |
SI2920335T1 (sl) | 2020-03-31 |
CA2889124C (fr) | 2020-12-29 |
FR2997962B1 (fr) | 2015-04-10 |
UA116218C2 (uk) | 2018-02-26 |
JP2016503460A (ja) | 2016-02-04 |
PL2920335T3 (pl) | 2020-05-18 |
ZA201503205B (en) | 2016-10-26 |
PT2920335T (pt) | 2020-03-17 |
FR2997962A1 (fr) | 2014-05-16 |
DK2920335T3 (da) | 2020-03-16 |
US20150284830A1 (en) | 2015-10-08 |
BR112015010975A2 (pt) | 2017-07-11 |
EP2920335A1 (fr) | 2015-09-23 |
KR20150083998A (ko) | 2015-07-21 |
MX2015006053A (es) | 2015-11-23 |
ES2777934T3 (es) | 2020-08-06 |
CN104812922A (zh) | 2015-07-29 |
CA2889124A1 (fr) | 2014-05-22 |
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