CN107686936A - A kind of gooseneck material kettle cast iron and preparation method thereof - Google Patents
A kind of gooseneck material kettle cast iron and preparation method thereof Download PDFInfo
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- CN107686936A CN107686936A CN201710729264.4A CN201710729264A CN107686936A CN 107686936 A CN107686936 A CN 107686936A CN 201710729264 A CN201710729264 A CN 201710729264A CN 107686936 A CN107686936 A CN 107686936A
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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
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- 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
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- 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
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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
- C22C37/04—Cast-iron alloys containing spheroidal graphite
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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
- C22C37/06—Cast-iron alloys containing chromium
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Abstract
The invention discloses a kind of gooseneck material kettle cast iron, by weight percentage, including：C：3.30‑3.40%；Si：3.70‑3.90%；Mn：0.50‑0.60%；P≤0.040%；S≤0.012%；Cr：0.25‑0.40%；Mo：0.35‑0.45%；Cu：0.35‑0.45%；RE：0.030‑0.040%；Mg：0.030‑0.045%；The iron of surplus and can not the removal of impurity.The cast iron of the present invention can effectively improve the thermal shock resistance and thermal fatigue resistance of cast iron, and can significantly improve service life of the cast iron in high-temperature severe environment on the basis of good tensile strength and elongation after fracture is obtained；The tensile strength R of its cast ironm≥620MPa；Elongation after fracture A >=15%；Hardness：195‑250HB；Service life >=150,000 moulds are secondary.
Description
Technical field
The present invention relates to a kind of spheroidal graphite cast-iron, more particularly to a kind of gooseneck material kettle cast iron and preparation method thereof.
Background technology
Gooseneck material kettle（Also gooseneck is, expects kettle）, it is hot type zinc（Or magnesium）One important accessory of alloy die cast machine, it is main to use
In the zinc of connection melting（Or magnesium）The mould gate of aluminium alloy and die casting machine.
The operating temperature of gooseneck material kettle is 600-750 DEG C, and a gooseneck material kettle part is immersed in zinc（Or magnesium）In aluminium alloy.
The pressure of injection molten metal is not only born inside during work, and to support the thermal etching by high temperature and molten metal；In addition just open
During beginning work, the stress caused by heating power cold outside and hot inside is born.
Therefore it is required that gooseneck material kettle has high-quality thermal conductance and heat-resisting quantity, thermal coefficient of expansion is small, to high temperature solution
Corrosion resistance is stronger, has excellent chemical stability.
The main material of gooseneck material kettle is QT600CrCu at present, and chromium and copper are added when producing QT600-3 spheroidal graphite cast-iron,
Although chromium in high-temperature heating, in the dense oxidation film of its surface energy generation chromium, prevents the intrusion of oxygen, improves antioxygenic property,
With certain protectiveness, strengthen corrosion resistance；Chromium is stable carbide formers, can reduce free carbon mass fraction, is hindered
The erosion of molten metal.But client uses the gooseneck material kettle of the material under the condition of work of high temperature hostile using checking, easily
Cracking, commonly using one week or so（The moulds of 4-6 ten thousand）It is shorter with regard to cracking, service life.
In order to improve the correlated performance of spheroidal graphite cast-iron, No. 200980146974.8 Chinese patents disclose a kind of spheroidal graphite casting
Iron, it has the elevated temperature strength and oxidative resistance more excellent than conventional high SiMo spheroidal graphite cast-iron at a temperature of more than 800 DEG C.Its
Contain carbon by quality ratio:2.0~4.0%, silicon:3.5~5.0%, manganese:Less than 1.0%, chromium:0.1~1.0%, molybdenum:0.2~
2.0%th, vanadium:0.1~1.0%, magnesium:0.02~0.1%, remainder is made up of iron and inevitable impurity.Such a spheroidal graphite cast-iron
High-temperature behavior and oxidative resistance under hot environment during gas burning can only be born, can not bear to be produced by metal liquid for a long time
Hot environment.Precisely, zinc or magnesium are very active metallic elements, in high temperature environments the oxygen hair easily and in air
Corrosion function when biochemical reaction, such a spheroidal graphite cast-iron can not bear the chemical reaction to it.It is simultaneously each disclosed in the patent
The scope of component is very big, without the instruction of reality, has not applied to producing for present spheroidal graphite cast-iron.
The content of the invention
The shortcomings that in order to overcome prior art and deficiency, it is an object of the invention to provide a kind of high thermal shock ability and
Thermal fatigue resistance, and service life >=secondary gooseneck material kettle cast iron of 150,000 moulds.
Gooseneck material kettle cast iron of the present invention, by weight percentage, including following component：C：3.30-3.40%；Si：
3.70-3.90%；Mn：0.50-0.60%；P≤0.040%；S≤0.012%；Cr：0.25-0.40%；Mo：0.35-0.45%；Cu：
0.35-0.45%；RE：0.030-0.040%；Mg：0.030-0.045%；The iron of surplus and can not the removal of impurity.
Wherein, the RE is made up of at least one of Ce, Y and La.Ce is mainly derived from raw material and rare earth calcium breeds
Agent；Y is mainly derived from nodulizer；La is mainly derived from raw material and nodulizer.
Hereinafter, the restriction reason of the content of each composition is illustrated：
Silicon（Si）：In hot environment, after silicon is aoxidized, one layer is generated by FeO and SiO in cast(ing) surface2What is formed is compound
Compound（2FeO•SiO2）, densification and cast(ing) surface strong bonded diaphragm is formed, diaphragm prevents oxonium ion from passing through
Cast product surface layer internally penetrates into, and can effectively mitigate casting oxidation；Special Si suppresses the effect of oxidation in 3.70-3.90%
It is more notable.
Chromium（Cr）：In high-temperature heating, in the dense oxidation film of its surface energy generation chromium（Cr2O3）, the intrusion of oxygen is prevented,
Antioxygenic property is improved, more protectiveness, corrosion resistance is remarkably reinforced.In addition chromium is stable carbide formers, can be reduced certainly
By carbon mass fraction, molten metal is hindered to corrode.
Molybdenum（Mo）：In cast iron plus molybdenum forms equally distributed molybdenum carbide, and molybdenum hinders the diffusion of crystal boundary, carried in grain boundaries
High elevated temperature strength and Resisting fractre ability；Therefore add molybdenum, casting deformation, the tendency of cracking can be reduced.The Mo that molybdenum is formed simultaneously2O3It is blunt
Change film, compare Cr2O3Passivating film is more firm, and high-temperature oxidation resistance is stronger, and Mo2O3Passivating film, it is resistant to sulfur-containing anion, chlorion
Gas or liquid corrosion.
Copper（Cu）：During copper content 0.35-0.45%, mainly coordinate with molybdenum, enhancing molybdenum improves the ability of quenching degree；Simultaneously
The sensitivity profile of casting is reduced, makes the fractography of different-thickness and performance uniform.
Rare earth（RE）：The addition of rare earth not only increases the graphite forming core core of spheroidal graphite cast-iron, such as CeS, LaS；And can be thin
Change crystal grain, strengthen matrix, so that matrix elevated temperature strength improves and erosion resistance enhancing, improve the viscous of oxide-film
Attached property, makes oxide-film be not easily broken and peel off, and reduces the speed of oxidation reaction, improves anti-oxidant growth ability.
In addition, the invention also discloses the preparation method of above-mentioned gooseneck material kettle cast iron, comprise the following steps：
a）Smelting technology：By 40-50% magnesium iron foundry returns, 50-60% automobiles corner packing material block, and 1.75-2.25% carburetting
Agent, melting is carried out by synthetic ductile iron smelting technology, 1.70-2.40% ferrosilicon, 0.29-0.51% manganese are added in fusion process
Iron, 0.45-0.73% ferrochrome, 0.43-0.77% molybdenum-irons；0.38-0.48% cathode copper；Meet original iron melt chemical composition：C：
3.40-3.55%；Si：2.39-2.58%；Mn：0.50-0.60%；P≤0.040%；S≤0.022%；Cr：0.25-0.40%；Mo：
0.35-0.45%；Cu：0.35-0.45%；
b）The original iron melt for meeting above-mentioned requirements is warming up to 1450-1460 DEG C, the processing of water outlet spheroidization and inoculation.
Wherein, the water outlet spheroidization and inoculation, which is handled, is specially：1.25-1.35% nodulizers, 0.7- are placed in ladle
0.9% 75SiFe inovulants are pressed on nodulizer, and 0.3-0.4% steel discs are pressed on 75SiFe；0.4- is added in water outlet 1/2
0.6% rare earth calcium silicon iron inoculator carries out 2 inoculations, wherein, pouring temperature is 1360-1340 DEG C.
Wherein, the nodulizer meets following requirement：Mg：6.04%；RE：4.6%；Si：45.1%；Ca：2.03%；Mn：
3.5%；Al：0.42%；Remaining Fe；Granularity：3-20mm；
The 75SiFe inovulants meet following requirement：Si：74.5%；Al：0.75%；Remaining Fe；Granularity：3-10mm；
The size of the steel disc is less than 10mm × 10mm × 5mm.
Wherein, the rare earth calcium silicon iron inoculator meets following requirement：Si：73%；Ca：1.15%；Ce：1.95%；Al：
1.0%；S：0.95%；O：0.88%；Remaining Fe；Granularity：3-8mm.
Wherein, the magnesium iron foundry returns chemical composition：C：3.48%；Si：2.55%；Mn：0.45%；P：0.021%；S：
0.008%；RE:0.015%；Mg：0.038%；Remaining Fe；
The automobile corner packing material block：C：0.005%；Si：0.015%；Mn：0.16%；P：0.011%；S：0.007%；Remaining Fe；
The carburant：Fixed carbon：99.1%；S：0.031%；Granularity：0.5-2mm；
The ferrosilicon：Si：72.4%；Al：1.1%；Remaining Fe；Thickness ＜ 100mm；
The ferromanganese：Mn：65.2%；C：6.5%；Si：1.3%；P：0.40%；S：0.02%；Remaining Fe；
The ferrochrome：Cr：55.5%；C：9.5%；Si：4.4%；P：0.030%；S：0.023%；Remaining Fe；
The molybdenum-iron：Mo：58.3%；C：0.20%；Si：1.5%；P：0.10%：S：0.13%；Remaining Fe；
The cathode copper：Cu：99.3%.
The present invention compared with prior art, has the advantages that：
The present invention effectively improves the eutectoid of gooseneck material kettle cast iron, makes to be organized in higher temperature by silicon solution strengthening
In the range of do not undergo phase transition, contribute to suppress cast iron it is thermally grown；Cr, Mo, Cu, RE by adding certain content etc. is closed simultaneously
Gold element, and under the synergy of its respective components, cast iron can obtain good tensile strength and elongation after fracture
On the basis of, the thermal shock resistance and thermal fatigue resistance of gooseneck material kettle cast iron are effectively improved, and gooseneck material can be significantly improved
Service life of the kettle cast iron in high-temperature severe environment；The tensile strength R of its gooseneck material kettle cast ironm≥620MPa；Have no progeny elongation
Rate A >=15%；Hardness：195-250HB；Service life >=150,000 moulds are secondary.
Brief description of the drawings
Fig. 1 be embodiment 1 gooseneck material kettle iron corrosion before 100 times of graphite form metallographic result；
Fig. 2 be embodiment 1 gooseneck material kettle iron corrosion after 100 times of matrix metallographic result.
Embodiment
The present invention is further illustrated below by embodiment, following examples are the preferable embodiment party of the present invention
Formula, but embodiments of the present invention are not limited by following embodiments.
The method of testing of each index：
The method of testing of elongation after fracture is carried out by GB/T228-2010 metal materials tensile testing at ambient temperature, using Φ 14
Sample, axially at the uniform velocity apply static stretch load along sample, until the elongation of sample fracture, in whole process, measurement examination
Sample stretch value, elongation after fracture can be calculated.
Tensile strength Rm method of testing is carried out by GB/T228-2010 metal materials tensile testing at ambient temperature, is used
Φ 14 sample, axially at the uniform velocity apply static stretch load along sample, until the elongation of sample fracture, in whole process, survey
Amount is applied to load on sample, can calculate tensile strength values.
The method of testing of hardness is the method progress by GB/T231.2-2002 metal Brinell hardness tests.
The method of testing of Oxygen potential, graphite and ferrite quantity is examined by GB/T9441-2009 Spheroidal Graphite Cast Iron Metallographic Structures
The method tested is carried out.
The evaluation method of service life：Under hot environment ironcasting be using thermal fatigue resistance and thermal shock resistance as
Evaluate its main standard in service life.Thermal fatigue resistance can be reflected by tensile strength and elongation after fracture.Cast iron
The evaluation method of part service life, it is microcosmic it is upper mainly with globular graphite form, graphite, matrix, the thermal cycle temperature difference and
Thermal conductivity etc. is relevant；Number when macroscopically directly by using（Ten thousand moulds）To evaluate.
Embodiment 1
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.29%；Mo：0.38%；Cu：0.41%；RE：0.038%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；
The preparation method of above-mentioned gooseneck material kettle cast iron, comprises the following steps：
a）Smelting technology：By 45% magnesium iron foundry returns, 55% automobile corner packing material block, and 2.00% carburant, pass through synthesis
Magnesium iron smelting technology carries out melting, and 2.05% ferrosilicon, 0.40% ferromanganese, 0.59% ferrochrome, 0.60% molybdenum are added during melting
Iron；0.44% cathode copper；Meet original iron melt chemical composition：C：3.48%；Si：2.44%；Mn：0.55%；P：0.024%；S：
0.020%；Cr：0.29%；Mo：0.38%；Cu：0.41%；
b）The original iron melt for meeting above-mentioned requirements is warming up to 1455 DEG C, the processing of water outlet spheroidization and inoculation；At the water outlet spheroidization and inoculation
Reason is specially：1.3% nodulizer is placed in ladle, 0.8% 75SiFe inovulants are pressed on nodulizer, 0.35% steel disc pressure
On 75SiFe；0.5% rare earth calcium silicon iron inoculator is added in water outlet 1/2 and carries out 2 inoculations, wherein, pouring temperature is
1351℃；
Wherein, the nodulizer meets following requirement：Mg：6.04%；RE：4.6%；Si：45.1%；Ca：2.03%；Mn：3.5%；
Al：0.42%；Remaining Fe；Granularity：3-20mm；
The 75SiFe inovulants meet following requirement：Si：74.5%；Al：0.75%；Remaining Fe；Granularity：3-10mm；
The size of the steel disc is less than 10mm × 10mm × 5mm；
Wherein, the rare earth calcium silicon iron inoculator meets following requirement：Si：73%；Ca：1.15%；Ce：1.95%；Al：1.0%；S：
0.95%；O：0.88%；Remaining Fe；Granularity：3-8mm；
Wherein, the magnesium iron foundry returns chemical composition：C：3.48%；Si：2.55%；Mn：0.45%；P：0.021%；S：0.008%；
RE:0.015%；Mg：0.038%；Remaining Fe；
The automobile corner packing material block：C：0.005%；Si：0.015%；Mn：0.16%；P：0.011%；S：0.007%；Remaining Fe；
The carburant：Fixed carbon：99.1%；S：0.031%；Granularity：0.5-2mm；
The ferrosilicon：Si：72.4%；Al：1.1%；Remaining Fe；Thickness ＜ 100mm；
The ferromanganese：Mn：65.2%；C：6.5%；Si：1.3%；P：0.40%；S：0.02%；Remaining Fe；
The ferrochrome：Cr：55.5%；C：9.5%；Si：4.4%；P：0.030%；S：0.023%；Remaining Fe；
The molybdenum-iron：Mo：58.3%；C：0.20%；Si：1.5%；P：0.10%：S：0.13%；Remaining Fe；
The cathode copper：Cu：99.3%；Produce gooseneck material kettle cast iron；
The metallographic result for the gooseneck material kettle cast iron being prepared as depicted in figs. 1 and 2, elongation after fracture, hardness, tensile strength,
Oxygen potential, graphite, ferrite quantity, service life are as shown in table 1.
Embodiment 2
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.30%；Si：3.90%；Mn：0.50%；P：
0.018%；S：0.010%；Cr：0.25%；Mo：0.45%；Cu：0.35%；RE：0.040%；Mg：0.030%;The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Embodiment 3
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.40%；Si：3.70%；Mn：0.60%；P：
0.021%；S：0.009%；Cr：0.40%；Mo：0.35%；Cu：0.45%；RE：0.030%；Mg：0.045%;The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Comparative example 1
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.65%；Si：2.80%；Mn：0.31%；P：
0.020%；S：0.010%；RE：0.015%；Mg：0.051%；The iron of surplus and can not the removal of impurity；
The preparation method of above-mentioned gooseneck material kettle cast iron, comprises the following steps：
a）Smelting technology：By 45% magnesium iron foundry returns, 55% automobile corner packing material block, and 2.00% carburant, pass through synthesis
Magnesium iron smelting technology carries out melting, and 0.71% ferrosilicon is added during melting；Meet original iron melt chemical composition：C：
3.75%；Si：1.62%；Mn：0.30%；P：0.021%；S：0.018%；
b）The original iron melt for meeting above-mentioned requirements is warming up to 1451 DEG C, the processing of water outlet spheroidization and inoculation；At the water outlet spheroidization and inoculation
Reason is specially：1.3% nodulizer is placed in ladle, 0.5% 75SiFe inovulants are pressed on nodulizer, 0.35% steel disc pressure
On 75SiFe；0.6% calcium barium inovulant is added in water outlet 1/2 and carries out 2 inoculations, wherein, pouring temperature 1348
℃；
Wherein, the nodulizer meets following requirement：Mg：6.84%；RE：2.51%；Si：44.5%；Ca：1.78%；Al：0.62%；
Remaining Fe；Granularity：5-30mm；
The 75SiFe inovulants meet following requirement：Si：74.5%；Al：0.75%；Remaining Fe；Granularity：3-10mm；
The size of the steel disc is less than 10mm × 10mm × 5mm；
Wherein, the calcium barium inovulant meets following requirement：Si：72.8%；Ca：1.11%；Ba：2.32%；Al：1.28%；Remaining Fe；
Granularity：3-8mm；
Wherein, the magnesium iron foundry returns chemical composition：C：3.48%；Si：2.55%；Mn：0.45%；P：0.021%；S：0.008%；
RE:0.015%；Mg：0.038%；Remaining Fe；
The automobile corner packing material block：C：0.005%；Si：0.015%；Mn：0.16%；P：0.011%；S：0.007%；Remaining Fe；
The carburant：Fixed carbon：99.1%；S：0.031%；Granularity：0.5-2mm；
The ferrosilicon：Si：72.4%；Al：1.1%；Remaining Fe；Thickness ＜ 100mm；
Elongation after fracture, hardness, tensile strength, Oxygen potential, graphite, the ferrite number for the gooseneck material kettle cast iron being prepared
Amount, service life are as shown in table 1.
Comparative example 2
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.29%；Mo：0.38%；Cu：0.41%；RE：0.021%；Mg：0.038%；The iron of surplus and not
Can the removal of impurity；2 inoculations are carried out using calcium barium inovulant（Calcium barium inovulant meets following requirement：Si：72.8%；Ca：
1.11%；Ba：2.32%；Al：1.28%；Remaining Fe；Granularity：3-8mm）；Other are the same as embodiment 1；The gooseneck material kettle cast iron being prepared
Elongation after fracture, hardness, tensile strength, Oxygen potential, graphite, ferrite quantity, service life it is as shown in table 1.
Comparative example 3
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.15%；Mo：0.38%；Cu：0.41%；RE：0.038%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Comparative example 4
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.50%；Mo：0.38%；Cu：0.41%；RE：0.038%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Comparative example 5
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.29%；Mo：0.25%；Cu：0.41%；RE：0.038%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Comparative example 6
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.29%；Mo：0.55%；Cu：0.41%；RE：0.038%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Comparative example 7
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.29%；Mo：0.38%；Cu：0.25%；RE：0.038%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Comparative example 8
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.29%；Mo：0.38%；Cu：0.55%；RE：0.038%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Comparative example 9
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.29%；Mo：0.38%；Cu：0.41%；RE：0.020%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
Comparative example 10
A kind of gooseneck material kettle cast iron, by weight percentage, including following component：C：3.38%；Si：3.74%；Mn：0.55%；P：
0.024%；S：0.008%；Cr：0.29%；Mo：0.38%；Cu：0.41%；RE：0.050%；Mg：0.033%；The iron of surplus and not
Can the removal of impurity；Other are the same as embodiment 1；The elongation after fracture for the gooseneck material kettle cast iron being prepared, hardness, tensile strength, nodularization
Rate, graphite, ferrite quantity, service life are as shown in table 1.
The embodiment 1-3 of table 1 and comparative example 1-10 the performance test results.
Claims (7)
- A kind of 1. gooseneck material kettle cast iron, it is characterised in that by weight percentage, including following component：C：3.30-3.40%； Si：3.70-3.90%；Mn：0.50-0.60%；P≤0.040%；S≤0.012%；Cr：0.25-0.40%；Mo：0.35-0.45%； Cu：0.35-0.45%；RE：0.030-0.040%；Mg：0.030-0.045%;The iron of surplus and can not the removal of impurity.
- 2. gooseneck material kettle cast iron according to claim 1, it is characterised in that the RE is by least one of Ce, Y and La Composition.
- 3. the preparation method of a kind of gooseneck material kettle cast iron as described in claim any one of 1-2, it is characterised in that including as follows Step：a）Smelting technology：By 40-50% magnesium iron foundry returns, 50-60% automobiles corner packing material block, and 1.75-2.25% carburetting Agent, melting is carried out by synthetic ductile iron smelting technology, 1.70-2.40% ferrosilicon, 0.29-0.51% manganese are added during melting Iron, 0.45-0.73% ferrochrome, 0.43-0.77% molybdenum-irons；0.38-0.48% cathode copper；Meet original iron melt chemical composition：C： 3.40-3.55%；Si：2.39-2.58%；Mn：0.50-0.60%；P≤0.040%；S≤0.022%；Cr：0.25-0.40%；Mo： 0.35-0.45%；Cu：0.35-0.45%；b）The original iron melt for meeting above-mentioned requirements is warming up to 1450-1460 DEG C, the processing of water outlet spheroidization and inoculation.
- 4. the preparation method of gooseneck material kettle cast iron according to claim 3, it is characterised in that at the water outlet spheroidization and inoculation Reason is specially：1.25-1.35% nodulizers are placed in ladle, 0.7-0.9% 75SiFe inovulants are pressed on nodulizer, 0.3-0.4% steel discs are pressed on 75SiFe；0.4-0.6% rare earth calciums silicon iron inoculator is added in water outlet 1/2 and carries out 2 wombs Reason, wherein, pouring temperature is 1360-1340 DEG C.
- 5. the preparation method of gooseneck material kettle cast iron according to claim 4, it is characterised in that the nodulizer meets as follows It is required that：Mg：6.04%；RE：4.6%；Si：45.1%；Ca：2.03%；Mn：3.5%；Al：0.42%；Remaining Fe；Granularity：3-20mm；The 75SiFe inovulants meet following requirement：Si：74.5%；Al：0.75%；Remaining Fe；Granularity：3-10mm；The size of the steel disc is less than 10mm × 10mm × 5mm.
- 6. the preparation method of gooseneck material kettle cast iron according to claim 4, it is characterised in that the rare earth calcium ferrosilicon breeds Agent meets following requirement：Si：73%；Ca：1.15%；Ce：1.95%；Al：1.0%；S：0.95%；O：0.88%；Remaining Fe；Granularity：3- 8mm。
- 7. the preparation method of gooseneck material kettle cast iron according to claim 5, it is characterised in that the magnesium iron foundry returns chemistry Composition：C：3.48%；Si：2.55%；Mn：0.45%；P：0.021%；S：0.008%；RE:0.015%；Mg：0.038%；Remaining Fe；The automobile corner packing material block：C：0.005%；Si：0.015%；Mn：0.16%；P：0.011%；S：0.007%；Remaining Fe；The carburant：Fixed carbon：99.1%；S：0.031%；Granularity：0.5-2mm；The ferrosilicon：Si：72.4%；Al：1.1%；Remaining Fe；Thickness ＜ 100mm；The ferromanganese：Mn：65.2%；C：6.5%；Si：1.3%；P：0.40%；S：0.02%；Remaining Fe；The ferrochrome：Cr：55.5%；C：9.5%；Si：4.4%；P：0.030%；S：0.023%；Remaining Fe；The molybdenum-iron：Mo：58.3%；C：0.20%；Si：1.5%；P：0.10%：S：0.13%；Remaining Fe；The cathode copper：Cu：99.3%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114269491A (en) * | 2019-06-20 | 2022-04-01 | 雷蒙多·爱德华多·斯塔克波尔阿门达里斯 | Additive for treating molten iron to produce cast iron with zero shrinkage and with spheroidal graphites of the Langerhans type |
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| US4450019A (en) * | 1982-04-01 | 1984-05-22 | Toyo Kogyo Co., Ltd. | Ductile cast iron |
| JPS61133362A (en) * | 1984-12-01 | 1986-06-20 | Ishikawajima Harima Heavy Ind Co Ltd | High-si ferritic spheroidal graphite cast iron and its manufacture |
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| CN114269491A (en) * | 2019-06-20 | 2022-04-01 | 雷蒙多·爱德华多·斯塔克波尔阿门达里斯 | Additive for treating molten iron to produce cast iron with zero shrinkage and with spheroidal graphites of the Langerhans type |
| CN114269491B (en) * | 2019-06-20 | 2024-04-30 | 雷蒙多·爱德华多·斯塔克波尔阿门达里斯 | Additive for treating molten iron to produce cast iron with zero shrinkage and with lambertian spheroidal graphite |
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