CN110195184A - A kind of preparation method of superplasticity magnesium iron material - Google Patents
A kind of preparation method of superplasticity magnesium iron material Download PDFInfo
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- CN110195184A CN110195184A CN201910498323.0A CN201910498323A CN110195184A CN 110195184 A CN110195184 A CN 110195184A CN 201910498323 A CN201910498323 A CN 201910498323A CN 110195184 A CN110195184 A CN 110195184A
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- iron
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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
-
- 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
- C22C33/12—Making cast-iron alloys including procedures for adding magnesium by fluidised injection
-
- 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
- C22C37/10—Cast-iron alloys containing aluminium or silicon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of preparation methods of superplasticity magnesium iron material, and preparation method includes the following steps: cast iron melting, and --- --- --- taking off Slag treatment --- casting and late inoculation ---, casting is let cool microalloying spheroidization and inoculation；The superplasticity magnesium iron material composition is by mass percentage are as follows: carbon 3.60-3.70%, silicon 2.70-2.80%, manganese 0.15-0.25%, phosphorus≤0.06%, sulphur≤0.01%, copper 0.15-0.25%, nickel 0.15-0.25%, remaining magnesium 0.04-0.07%, surplus is iron.Tensile strength >=500MPa of superplasticity G. Iron Castings prepared by the present invention, elongation percentage >=25%, ontology hardness >=180HB, its intensity and hardness are suitable with magnesium iron QT500-7 material, its elongation percentage is 3 times or more of magnesium iron QT500-7 material, it is not easy that plucking is not easy to crack, and the punching press service life is long when applying in Press Tools for Automobiles material pressing core class formation part.
Description
Technical field
The present invention relates to alloy material casting technology fields, and in particular to a kind of preparation method of superplasticity magnesium iron material.
Background technique
Upper material pressing core class formation part usually selects common D4512, HT300, QT600-3 material in Press Tools for Automobiles, because
Material pressing core directly participates in stamped steel plate, and the surface hardness of its material of D4512 or HT300 is small, easily produces after punching press to a certain extent
Raw plucking phenomenon, QT600-3 material hardness is big, though it is low to be not easy plucking its material elongation percentage, is stamped into binder after certain number
Core can generate gusset cracking, and D4512, HT300 material elongation percentage are also relatively low also to generate gusset cracking phenomena, seriously affect mold
Punching press service life, Shortcomings.
Summary of the invention
In view of the above deficiencies, the present invention provides a kind of preparation method of superplasticity magnesium iron material, the superplasticity magnesium iron of preparation
Tensile strength >=500MPa of part, elongation percentage >=25%, ontology hardness >=180HB.
The technical scheme adopted by the invention is as follows:
A kind of preparation method of superplasticity magnesium iron material, which is characterized in that itself the following steps are included:
(1) cast iron melting:
According to the weight percent of setting, the silicon amount that nodulizer and inovulant are brought into is deducted, Q12 needed for weighing base iron
The magnesium iron pig iron, steel scrap, foundry returns, 75 ferrosilicon and 90 silicon carbide, are molten into molten iron in electric induction furnace；Base iron is taken to carry out light
Spectral test, adjusting component extremely: carbon 3.70-3.80%, silicon 1.70-1.80%, manganese 0.15-0.25%, phosphorus≤0.06%, sulphur≤
0.01%, remaining Fe add up to 100%；It skims in 1500-1510 DEG C of overheat 5-8min and furnace after the completion of melting down clean tapping afterwards
Water, tapping temperature are 1490-1510 DEG C.
Wherein melt the sequence of charging successively are as follows: it is first put into a part of magnesium iron pig iron, adds steel scrap and ferrosilicon, it is to be melted
After silicon carbide is added, the remaining magnesium iron pig iron and foundry returns is then added and is pressed in above silicon carbide to whole fusings.
The magnesium iron pig iron and steel scrap being wherein added are prepared by weight 6:4, and the additional amount of silicon carbide is weight of molten iron
1.0-1.3%, the granularity of silicon carbide are 3-10mm.
(2) spheroidization and inoculation:
To step (1) resulting molten iron using pouring method nodularization in casting ladle and once breeding while handling, light rare earth is added
Si-Mg alloy nodulizer and heavy rare earth Si-Mg alloy nodulizer each 50%, light rare earth Si-Mg alloy nodulizer and heavy rare earth silicon magnesium close
The total additional amount of gold goal agent is the 1.2% of weight of molten iron, and the silicon titanate innoculant that weight of molten iron 0.8% is added is covered on nodulizer
On, it is covered after compacting with magnesium iron plate and uses a little inovulant edge sealing.
The wherein mass percent of light rare earth Si-Mg alloy nodulizer are as follows: light rare earth RE1.98%, silicon Si44.36%, magnesium
Mg6.64%, calcium Ca2.15%, manganese Mn0.32%, aluminium Al0.61%, balance iron Fe, granularity 5-30mm.
The wherein mass percent of light rare earth Si-Mg alloy nodulizer are as follows: heavy rare earth RE3.51%, silicon Si43.06%, magnesium
Mg6.98%, antimony Sb is appropriate, balance iron Fe, granularity 5-30mm.
The wherein mass percent of silicon titanate innoculant are as follows: silicon Si70.34%, calcium Ca1.59%, barium Ba4.98%, aluminium
Al1.23%, balance iron Fe, granularity 3-10mm.
(3) microalloying:
The Ni plate of weight of molten iron 0.2% and 0.2% Cu are added using method is poured in packet to the resulting molten iron of step (2)
The content purity of plate, Ni plate and Cu plate is 99.9%, is poured with molten iron.
(4) Slag treatment is taken off:
Molten iron after microalloying is carried out to take off Slag treatment, is skimmed clean, slag-removing time controls within 3min.
(5) casting and late inoculation:
Time when molten iron tapping starts to casting controls within 10min, and temperature control is at 1380-1400 DEG C before being poured
Within, casting process leaks into the silicon bismuth random inoculant of weight of molten iron 0.15% using funnel with molten iron, uses in casting process
The slow pouring type of slow-to-fast-is simultaneously placed on the progress pushing off the slag of molten iron surface, super modeling to obtain the final product after casting complete using high temperature cotton and collection slag agent
Property magnesium iron material.
The wherein mass percent of silicon bismuth random inoculant are as follows: rare earth RE0.65%, silicon Si69.68%, calcium Ca1.23%,
Bismuth Bi0.98%, aluminium Al1.10%, balance iron Fe, granularity 0.3-1mm.
The composition of resulting superplasticity magnesium iron material is by mass percentage are as follows: carbon 3.60-3.70%, silicon 2.70-2.80%,
Manganese 0.15-0.25%, phosphorus≤0.06%, sulphur≤0.01%, copper 0.15-0.25%, nickel 0.15-0.25%, remaining magnesium 0.04-
0.07%, surplus is iron.
(6) casting is let cool:
After casting complete, casting Discharging time is not less than 60h, and casting solution box temperature degree is controlled at 300 DEG C or less.
The beneficial effects of the present invention are: tensile strength >=500MPa of superplasticity G. Iron Castings prepared by the present invention extends
Rate >=25%, ontology hardness >=180HB, intensity and hardness is suitable with magnesium iron QT500-7 material, and elongation percentage is magnesium iron
3 times or more of QT500-7 material；It is not easy to crack that plucking is not easy when applying the upper material pressing core class formation part in Press Tools for Automobiles,
The punching press service life is long.
Specific embodiment
The present invention is described in detail With reference to embodiment.
The present invention provides a kind of superplasticity magnesium iron material, composition by mass percentage are as follows: carbon 3.60-3.70%,
Silicon 2.70-2.80%, manganese 0.15-0.25%, phosphorus≤0.06%, sulphur≤0.01%, copper 0.15-0.25%, nickel 0.15-
0.25%, remaining magnesium 0.04-0.07%, surplus is iron.
The preparation method of above-mentioned superplasticity magnesium iron material the following steps are included:
(1) cast iron melting:
According to the weight percent of setting, the silicon amount that nodulizer and inovulant are brought into is deducted, Q12 needed for weighing base iron
The magnesium iron pig iron, steel scrap, foundry returns, 75 ferrosilicon and 90 silicon carbide, are molten into molten iron in electric induction furnace；Base iron is taken to carry out light
Spectral test, adjusting component extremely: carbon 3.70-3.80%, silicon 1.70-1.80%, manganese 0.15-0.25%, phosphorus≤0.06%, sulphur≤
0.01%, remaining Fe add up to 100%；It skims in 1500-1510 DEG C of overheat 5-8min and furnace after the completion of melting down clean tapping afterwards
Water, tapping temperature are 1490-1510 DEG C.
Wherein melt the sequence of charging successively are as follows: it is first put into a part of magnesium iron pig iron, adds steel scrap and ferrosilicon, it is to be melted
After silicon carbide is added, the remaining magnesium iron pig iron and foundry returns is then added and is pressed in above silicon carbide to whole fusings.
The magnesium iron pig iron and steel scrap being wherein added are prepared by weight 6:4, and the additional amount of silicon carbide is weight of molten iron
1.0-1.3%, the granularity of silicon carbide are 3-10mm.
(2) spheroidization and inoculation:
To step (1) resulting molten iron using pouring method nodularization in casting ladle and once breeding while handling, light rare earth is added
Si-Mg alloy nodulizer and heavy rare earth Si-Mg alloy nodulizer each 50%, light rare earth Si-Mg alloy nodulizer and heavy rare earth silicon magnesium close
The total additional amount of gold goal agent is the 1.2% of weight of molten iron, and the silicon titanate innoculant that weight of molten iron 0.8% is added is covered on nodulizer
On, it is covered after compacting with magnesium iron plate and uses a little inovulant edge sealing.
The wherein mass percent of light rare earth Si-Mg alloy nodulizer are as follows: light rare earth RE1.98%, silicon Si44.36%, magnesium
Mg6.64%, calcium Ca2.15%, manganese Mn0.32%, aluminium Al0.61%, balance iron Fe, granularity 5-30mm.
The wherein mass percent of light rare earth Si-Mg alloy nodulizer are as follows: heavy rare earth RE3.51%, silicon Si43.06%, magnesium
Mg6.98%, antimony Sb is appropriate, balance iron Fe, granularity 5-30mm.
The wherein mass percent of silicon titanate innoculant are as follows: silicon Si70.34%, calcium Ca1.59%, barium Ba4.98%, aluminium
Al1.23%, balance iron Fe, granularity 3-10mm.
(3) microalloying:
The Ni plate of weight of molten iron 0.2% and 0.2% Cu are added using method is poured in packet to the resulting molten iron of step (2)
The content purity of plate, Ni plate and Cu plate is 99.9%, is poured with molten iron.
(4) Slag treatment is taken off:
Molten iron after microalloying is carried out to take off Slag treatment, is skimmed clean, slag-removing time controls within 3min.
(5) casting and late inoculation:
Time when molten iron tapping starts to casting controls within 10min, and temperature control is at 1380-1400 DEG C before being poured
Within, casting process leaks into the silicon bismuth random inoculant of weight of molten iron 0.15% using funnel with molten iron, uses in casting process
The slow pouring type of slow-to-fast-is simultaneously placed on the progress pushing off the slag of molten iron surface, super modeling to obtain the final product after casting complete using high temperature cotton and collection slag agent
Property magnesium iron material.
The wherein mass percent of silicon bismuth random inoculant are as follows: rare earth RE0.65%, silicon Si69.68%, calcium Ca1.23%,
Bismuth Bi0.98%, aluminium Al1.10%, balance iron Fe, granularity 0.3-1mm.
The composition of resulting superplasticity magnesium iron material is by mass percentage are as follows: carbon 3.60-3.70%, silicon 2.70-2.80%,
Manganese 0.15-0.25%, phosphorus≤0.06%, sulphur≤0.01%, copper 0.15-0.25%, nickel 0.15-0.25%, remaining magnesium 0.04-
0.07%, surplus is iron.
(6) casting is let cool:
After casting complete, casting Discharging time is not less than 60h, and casting solution box temperature degree is controlled at 300 DEG C or less.
Embodiment 1:
Material composition quality percentage behind the stokehold for the superplasticity magnesium iron material that the present embodiment is prepared according to above-mentioned steps and furnace
Than being respectively as follows:
Stokehold: C3.761%, Si1.721%, Mn0.176%, P0.020%, S0.019%, surplus Fe；
After furnace: C3.662%, Si2.861%, Mn0.179%, P0.021%, S0.0024%, Cu0.247%,
Ni0.210%, Mg0.063%, surplus Fe.
Embodiment 2:
Material composition quality percentage behind the stokehold for the superplasticity magnesium iron material that the present embodiment is prepared according to above-mentioned steps and furnace
Than being respectively as follows:
Stokehold: C3.792%, Si1.810%, Mn0.136%, P0.025%, S0.021%, surplus Fe；
After furnace: C3.651%, Si2.790%, Mn0.152%, P0.026%, S0.0035%, Cu0.233%,
Ni0.195%, Mg0.064%, surplus Fe.
Embodiment 3:
Material composition quality percentage behind the stokehold for the superplasticity magnesium iron material that the present embodiment is prepared according to above-mentioned steps and furnace
Than being respectively as follows:
Stokehold: C3.820%, Si1.786%, Mn0.185%, P0.027%, S0.016%, surplus Fe；
After furnace: C3.653%, Si2.934%, Mn0.199%, P0.028%, S0.0028%, Cu0.256%,
Ni0.185%, Mg0.066%, surplus Fe.
Test result is as follows for superplasticity magnesium iron material cast properties prepared by above-described embodiment 1-3:
From above-mentioned the performance test results it is found that tensile strength >=500MPa of superplasticity G. Iron Castings prepared by the present invention, prolongs
Stretch rate >=25%, ontology hardness >=180HB.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (7)
1. a kind of preparation method of superplasticity magnesium iron material, which is characterized in that itself the following steps are included:
(1) cast iron melting:
According to the weight percent of setting, the silicon amount that nodulizer and inovulant are brought into is deducted, Q12 magnesium iron needed for weighing base iron
The pig iron, steel scrap, foundry returns, 75 ferrosilicon and 90 silicon carbide, are molten into molten iron in electric induction furnace；
Take base iron carry out spectral test, adjusting component extremely: carbon 3.70-3.80%, silicon 1.70-1.80%, manganese 0.15-
0.25%, phosphorus≤0.06%, sulphur≤0.01%, remaining Fe, total 100%；
It skims in 1500-1510 DEG C of overheat 5-8min and furnace after the completion of melting down clean molten iron discharging afterwards, tapping temperature 1490-1510
℃；
(2) spheroidization and inoculation:
To step (1) resulting molten iron using pouring method nodularization in casting ladle and once breeding while handling, light rare earth silicon magnesium is added
Alloy nodulizer and heavy rare earth Si-Mg alloy nodulizer each 50%, light rare earth Si-Mg alloy nodulizer and heavy rare earth Si-Mg alloy ball
The total additional amount of agent is the 1.2% of weight of molten iron, and the silicon titanate innoculant that weight of molten iron 0.8% is added is covered on nodulizer, is pressed
It is covered after reality with magnesium iron plate and uses a little inovulant edge sealing；
(3) microalloying:
The Ni plate of weight of molten iron 0.2% and 0.2% Cu plate, Ni are added using method is poured in packet to the resulting molten iron of step (2)
The content purity of plate and Cu plate is 99.9%, is poured with molten iron；
(4) Slag treatment is taken off:
Molten iron after microalloying is carried out to take off Slag treatment, is skimmed clean, slag-removing time controls within 3min；
(5) casting and late inoculation:
Molten iron tapping to casting start when time control within 10min, be poured before temperature control 1380-1400 DEG C with
Interior, casting process leaks into the silicon bismuth random inoculant of weight of molten iron 0.15% with molten iron using funnel, in casting process using it is slow-
Fast-slow pouring type is simultaneously placed on molten iron surface using high temperature cotton and collection slag agent and carries out pushing off the slag, up to superplasticity after casting complete
Magnesium iron material；
The composition of gained superplasticity magnesium iron material is by mass percentage are as follows: carbon 3.60-3.70%, silicon 2.70-2.80%, manganese
0.15-0.25%, phosphorus≤0.06%, sulphur≤0.01%, copper 0.15-0.25%, nickel 0.15-0.25%, remaining magnesium 0.04-
0.07%, surplus is iron；
(6) casting is let cool:
Casting Discharging time is not less than 60h after casting complete, and casting solution box temperature degree is controlled at 300 DEG C or less.
2. a kind of preparation method of superplasticity magnesium iron material according to claim 1, which is characterized in that the step (1)
The sequence of middle fusing charging is successively are as follows: is first put into a part of magnesium iron pig iron, adds steel scrap and ferrosilicon, carbonization is added after to be melted
Then silicon is added the remaining magnesium iron pig iron and foundry returns and is pressed in above silicon carbide to whole fusings.
3. a kind of preparation method of superplasticity magnesium iron material according to claim 1, which is characterized in that the step (1)
The magnesium iron pig iron and steel scrap of middle addition are prepared by weight 6:4, and the additional amount of silicon carbide is the 1.0-1.3% of weight of molten iron, carbon
The granularity of SiClx is 3-10mm.
4. a kind of preparation method of superplasticity magnesium iron material according to claim 1, which is characterized in that the step (2)
In light rare earth Si-Mg alloy nodulizer mass percent are as follows: light rare earth RE1.98%, silicon Si44.36%, magnesium Mg6.64%,
Calcium Ca2.15%, manganese Mn0.32%, aluminium Al0.61%, balance iron Fe, granularity 5-30mm.
5. a kind of preparation method of superplasticity magnesium iron material according to claim 1, which is characterized in that the step (2)
In light rare earth Si-Mg alloy nodulizer mass percent are as follows: heavy rare earth RE3.51%, silicon Si43.06%, magnesium Mg6.98%,
Antimony Sb is appropriate, balance iron Fe, granularity 5-30mm.
6. a kind of preparation method of superplasticity magnesium iron material according to claim 1, which is characterized in that the step (2)
In silicon titanate innoculant mass percent are as follows: silicon Si70.34%, calcium Ca1.59%, barium Ba4.98%, aluminium Al1.23% are remaining
Measure iron Fe, granularity 3-10mm.
7. a kind of preparation method of superplasticity magnesium iron material according to claim 1, which is characterized in that the step (5)
The mass percent of middle silicon bismuth random inoculant are as follows: rare earth RE0.65%, silicon Si69.68%, calcium Ca1.23%, bismuth
Bi0.98%, aluminium Al1.10%, balance iron Fe, granularity 0.3-1mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113897538A (en) * | 2021-10-12 | 2022-01-07 | 安徽裕隆模具铸业有限公司 | High-strength and high-elongation as-cast QT500-18 nodular cast iron and preparation method thereof |
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| CN113897538A (en) * | 2021-10-12 | 2022-01-07 | 安徽裕隆模具铸业有限公司 | High-strength and high-elongation as-cast QT500-18 nodular cast iron and preparation method thereof |
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Application publication date: 20190903 |