CN109852874A - A kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron - Google Patents
A kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron Download PDFInfo
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- CN109852874A CN109852874A CN201910293351.9A CN201910293351A CN109852874A CN 109852874 A CN109852874 A CN 109852874A CN 201910293351 A CN201910293351 A CN 201910293351A CN 109852874 A CN109852874 A CN 109852874A
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Abstract
The invention discloses a kind of preparation methods of optimizing components type QT600-3 spheroidal graphite cast-iron, include the following steps: S1: material prepares, S2: above-mentioned material is taken to be matched, S3: method is poured using dam-type according to raw material obtained in step S2, nodularization packet dykes and dams are added in nodulizer and lean on furnace body side, S4: after molten iron all injects, the inovulant that granularity is 1-3mm is added with stream and carries out late inoculation processing, S5: the nodular cast iron in step S4 is taken, S6: the semi-finished product in step S5 are heated to 900-950 DEG C, this method step is clear, when investment specific production, feasibility is high, and it can guarantee that the removal of impurity of the spheroidal graphite cast-iron is higher by the proportion of various elements ingredient, pass through the air-cooled performance that can guarantee the spheroidal graphite cast-iron twice.
Description
Technical field
The present invention relates to spheroidal graphite cast-iron technical field more particularly to a kind of systems of optimizing components type QT600-3 spheroidal graphite cast-iron
Preparation Method.
Background technique
Spheroidal graphite cast-iron is a kind of 20th century high strength cast iron material for growing up of the fifties, comprehensive performance close to
Steel is based on its excellent performance, has been successfully used to cast some stress complexity, intensity, toughness, wearability are more demanding
Part.Spheroidal graphite cast-iron rapidly developed for be only second to gray cast iron, using very extensive cast iron materials.It is so-called " with iron generation
Steel " refers mainly to spheroidal graphite cast-iron.Current Alloy Affecting Ductile Properties are poor, and removal of impurity is lower in its preparation process.
Summary of the invention
The invention proposes a kind of preparation methods of optimizing components type QT600-3 spheroidal graphite cast-iron, to solve above-mentioned background skill
The problem of being proposed in art.
The invention proposes a kind of preparation methods of optimizing components type QT600-3 spheroidal graphite cast-iron, include the following steps:
S1: material prepares, first carbon 50-100 parts of preparation, and 30-60 parts of silicon, 15-30 parts of manganese, 10-15 parts of cerium, magnesium 8-10
Part, 6-8 parts of yttrium, 4-6 parts of molybdenum, 2-4 parts of rhenium and enough phosphorus, sulphur, iron；
S2: taking above-mentioned material to be matched, and wherein the gross mass accounting of a variety of materials is carbon 3.5%-3.8%, silicon
2.4%-2.7%, manganese 0.29%-0.35%, cerium 0.03%-0.04%, magnesium 0.045%-0.06%, yttrium 0.08%-0.1%,
Molybdenum 0.01%-0.02%, rhenium 0.02%-0.03%, phosphorus≤0.04%, sulphur≤0.018%, surplus are iron, then will proportion original
Material, which is put into medium-frequency induction furnace, to be melted, and is guaranteed that molten iron temperature is 1560-1600 DEG C in melting process, is obtained after melting
Base iron and carry out desulfurization process；
S3: method is poured using dam-type according to raw material obtained in step S2, nodularization packet dykes and dams are added in nodulizer and lean on furnace
Body side, is then covered on nodulizer surface for the inovulant that granularity is 3-8mm, places one piece then with a thickness of the dedicated of 8mm
Pressing plate iron fork is smash flat, and molten iron is added in nodularization packet and carries out spheroidising and once breeds；
S4: after molten iron all injects, the inovulant that granularity is 1-3mm is added with stream and carries out late inoculation processing, nodularization
Treatment temperature is maintained at 1510-1540 DEG C, and agent of skimming then is added into iron liquid, stirs, skim, then cool the temperature to
After 1330-1360 DEG C, molten iron is quickly poured into sand mo(u)ld, nodular cast iron is obtained；
S5: taking the nodular cast iron in step S4, and be heated to 850-900 DEG C, by spheroidal graphite after constant temperature 90-120min
Cast iron is put into 120-150 DEG C of salt bath and is cooled down, and after cooling 3-5min, taking-up is air-cooled, obtains half after being air-cooled to room temperature
Finished product；
S6: the semi-finished product in step S5 are heated to 900-950 DEG C, keep the temperature 2-4h, are cooled down with the speed of 10-12 DEG C/min
To 550-600 DEG C, then be air-cooled to room temperature, will be air-cooled after casting be heated to 700-750 DEG C, 1-2h is kept the temperature, with 2-4 DEG C/min's
Speed is cooled to 550-600 DEG C, then is air-cooled to room temperature, obtains optimizing components type spheroidal graphite cast-iron.
It is preferred: in step s 2, to need to detect each element content in molten iron after raw material all melts, work as element
When content inaccuracy, need to be adjusted it until content meets recipe requirements.
Preferred: the dykes and dams height in step S3 is 100-200mm.
Preferred: the inovulant model Si65Ba5 in step S3, the dosage for once breeding middle inovulant is iron liquid quality
0.4-0.6%, the dosage of inovulant is the 0.2-0.3% of iron liquid quality in late inoculation.
Preferred: the silicon being added in step S2 is silicon carbide.
Preferred: the salt bath in step S6 is salt made from earth containing a comparatively high percentage of sodium chloride bath.
A kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron proposed by the present invention, beneficial effect are: the party
Method step is clear, and when investment specific production, feasibility is high, and can guarantee the spheroidal graphite by the proportion of various elements ingredient
The removal of impurity of cast iron is higher, passes through the air-cooled performance that can guarantee the spheroidal graphite cast-iron twice.
Specific embodiment
It is next combined with specific embodiments below that the present invention will be further described.
Embodiment 1
The invention proposes a kind of preparation methods of optimizing components type QT600-3 spheroidal graphite cast-iron, include the following steps:
S1: material prepares, first 50 parts of carbon of preparation, and 30 parts of silicon, 15 parts of manganese, 10-15 parts of cerium, 8 parts of magnesium, 6 parts of yttrium, 4 parts of molybdenum,
2 parts of rhenium and enough phosphorus, sulphur, iron；
S2: taking above-mentioned material to be matched, and wherein the gross mass accounting of a variety of materials is carbon 3.5%-3.8%, silicon
2.4%-2.7%, manganese 0.29%-0.35%, cerium 0.03%-0.04%, magnesium 0.045%-0.06%, yttrium 0.08%-0.1%,
Molybdenum 0.01%-0.02%, rhenium 0.02%-0.03%, phosphorus≤0.04%, sulphur≤0.018%, surplus are iron, then will proportion original
Material, which is put into medium-frequency induction furnace, to be melted, and guarantees that molten iron temperature is 1560 DEG C in melting process, former iron is obtained after melting
Water and carry out desulfurization process；
S3: method is poured using dam-type according to raw material obtained in step S2, nodularization packet dykes and dams are added in nodulizer and lean on furnace
Body side, is then covered on nodulizer surface for the inovulant that granularity is 3mm, then places one piece of dedicated pressure with a thickness of 8mm
Plate iron fork is smash flat, and molten iron is added in nodularization packet and carries out spheroidising and once breeds；
S4: after molten iron whole is injected, granularity is added for the inovulant progress late inoculation processing of 1mm, at nodularization with stream
Reason temperature is maintained at 1510 DEG C, and agent of skimming then is added into iron liquid, stirs, skim, will after then cooling the temperature to 1330 DEG C
Molten iron quickly pours into sand mo(u)ld, obtains nodular cast iron；
S5: taking the nodular cast iron in step S4, and is heated to 850 DEG C, is put into spheroidal graphite cast-iron after constant temperature 90min
It is cooled down into 120 DEG C of salt baths, after cooling 3min, taking-up is air-cooled, obtains semi-finished product after being air-cooled to room temperature；
S6: being heated to 900 DEG C for the semi-finished product in step S5, keep the temperature 2h, be cooled to 550 DEG C with the speed of 10 DEG C/min,
Be air-cooled to room temperature again, will be air-cooled after casting be heated to 700 DEG C, keep the temperature 1h, be cooled to 550 DEG C with the speed of 2 DEG C/min, then empty
It is cooled to room temperature, obtains optimizing components type spheroidal graphite cast-iron.
In step s 2, need to detect each element content in molten iron after raw material all melts, when constituent content not
When accurate, need to be adjusted it until content meets recipe requirements.Dykes and dams height in step S3 is 100mm.
Inovulant model Si65Ba5 in step S3, the dosage for once breeding middle inovulant is iron liquid quality
0.4%, the dosage of inovulant is the 0.2% of iron liquid quality in late inoculation.The silicon being added in step S2 is silicon carbide.
Salt bath in step S6 is salt made from earth containing a comparatively high percentage of sodium chloride bath.
Embodiment 2
The invention proposes a kind of preparation methods of optimizing components type QT600-3 spheroidal graphite cast-iron, include the following steps:
S1: material prepares, first 100 parts of carbon of preparation, and 60 parts of silicon, 30 parts of manganese, 15 parts of cerium, 10 parts of magnesium, 8 parts of yttrium, 6 parts of molybdenum,
4 parts of rhenium and enough phosphorus, sulphur, iron；
S2: taking above-mentioned material to be matched, and wherein the gross mass accounting of a variety of materials is carbon 3.5%-3.8%, silicon
2.4%-2.7%, manganese 0.29%-0.35%, cerium 0.03%-0.04%, magnesium 0.045%-0.06%, yttrium 0.08%-0.1%,
Molybdenum 0.01%-0.02%, rhenium 0.02%-0.03%, phosphorus≤0.04%, sulphur≤0.018%, surplus are iron, then will proportion original
Material, which is put into medium-frequency induction furnace, to be melted, and guarantees that molten iron temperature is 1600 DEG C in melting process, former iron is obtained after melting
Water and carry out desulfurization process；
S3: method is poured using dam-type according to raw material obtained in step S2, nodularization packet dykes and dams are added in nodulizer and lean on furnace
Body side, is then covered on nodulizer surface for the inovulant that granularity is 8mm, then places one piece of dedicated pressure with a thickness of 8mm
Plate iron fork is smash flat, and molten iron is added in nodularization packet and carries out spheroidising and once breeds；
S4: after molten iron whole is injected, granularity is added for the inovulant progress late inoculation processing of 3mm, at nodularization with stream
Reason temperature is maintained at 1540 DEG C, and agent of skimming then is added into iron liquid, stirs, skim, will after then cooling the temperature to 1360 DEG C
Molten iron quickly pours into sand mo(u)ld, obtains nodular cast iron；
S5: taking the nodular cast iron in step S4, and is heated to 900 DEG C, puts spheroidal graphite cast-iron after constant temperature 120min
Enter into 120-150 DEG C of salt bath and cooled down, after cooling 5min, taking-up is air-cooled, obtains semi-finished product after being air-cooled to room temperature；
S6: being heated to 950 DEG C for the semi-finished product in step S5, keep the temperature 4h, be cooled to 600 DEG C with the speed of 12 DEG C/min,
Be air-cooled to room temperature again, will be air-cooled after casting be heated to 750 DEG C, keep the temperature 2h, be cooled to 600 DEG C with the speed of 4 DEG C/min, then empty
It is cooled to room temperature, obtains optimizing components type spheroidal graphite cast-iron.
In step s 2, need to detect each element content in molten iron after raw material all melts, when constituent content not
When accurate, need to be adjusted it until content meets recipe requirements.Dykes and dams height in step S3 is 200mm.
Inovulant model Si65Ba5 in step S3, the dosage for once breeding middle inovulant is iron liquid quality
0.6%, the dosage of inovulant is the 0.3% of iron liquid quality in late inoculation.The silicon being added in step S2 is silicon carbide.
Salt bath in step S6 is salt made from earth containing a comparatively high percentage of sodium chloride bath.
Embodiment 3
The invention proposes a kind of preparation methods of optimizing components type QT600-3 spheroidal graphite cast-iron, include the following steps:
S1: material prepares, first 60 parts of carbon of preparation, and 40 parts of silicon, 20 parts of manganese, 12 parts of cerium, 9 parts of magnesium, 7 parts of yttrium, 5 parts of molybdenum, rhenium 3
Part and enough phosphorus, sulphur, iron；
S2: taking above-mentioned material to be matched, and wherein the gross mass accounting of a variety of materials is carbon 3.5%-3.8%, silicon
2.4%-2.7%, manganese 0.29%-0.35%, cerium 0.03%-0.04%, magnesium 0.045%-0.06%, yttrium 0.08%-0.1%,
Molybdenum 0.01%-0.02%, rhenium 0.02%-0.03%, phosphorus≤0.04%, sulphur≤0.018%, surplus are iron, then will proportion original
Material, which is put into medium-frequency induction furnace, to be melted, and guarantees that molten iron temperature is 1570 DEG C in melting process, former iron is obtained after melting
Water and carry out desulfurization process；
S3: method is poured using dam-type according to raw material obtained in step S2, nodularization packet dykes and dams are added in nodulizer and lean on furnace
Body side, is then covered on nodulizer surface for the inovulant that granularity is 5mm, then places one piece of dedicated pressure with a thickness of 8mm
Plate iron fork is smash flat, and molten iron is added in nodularization packet and carries out spheroidising and once breeds；
S4: after molten iron whole is injected, granularity is added for the inovulant progress late inoculation processing of 2mm, at nodularization with stream
Reason temperature is maintained at 1530 DEG C, and agent of skimming then is added into iron liquid, stirs, skim, will after then cooling the temperature to 1340 DEG C
Molten iron quickly pours into sand mo(u)ld, obtains nodular cast iron；
S5: taking the nodular cast iron in step S4, and is heated to 870 DEG C, puts spheroidal graphite cast-iron after constant temperature 100min
Enter into 130 DEG C of salt bath and cooled down, after cooling 4min, taking-up is air-cooled, obtains semi-finished product after being air-cooled to room temperature；
S6: being heated to 930 DEG C for the semi-finished product in step S5, keep the temperature 3h, be cooled to 570 DEG C with the speed of 11 DEG C/min,
Be air-cooled to room temperature again, will be air-cooled after casting be heated to 730 DEG C, keep the temperature 1.5h, be cooled to 560 DEG C with the speed of 3 DEG C/min, then
It is air-cooled to room temperature, obtains optimizing components type spheroidal graphite cast-iron.
In step s 2, need to detect each element content in molten iron after raw material all melts, when constituent content not
When accurate, need to be adjusted it until content meets recipe requirements.Dykes and dams height in step S3 is 150mm.
Inovulant model Si65Ba5 in step S3, the dosage for once breeding middle inovulant is iron liquid quality
0.5%, the dosage of inovulant is the 0.25% of iron liquid quality in late inoculation.The silicon being added in step S2 is silicon carbide.
Salt bath in step S6 is salt made from earth containing a comparatively high percentage of sodium chloride bath.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron, which comprises the following steps:
S1: material prepares, and prepares the alloy materials such as the corresponding pig iron, steel scrap, silicon, manganese, copper first；Prepare carbon 50-100 first
Part, 30-60 parts of silicon, 15-30 parts of manganese, 10-15 parts of cerium, 8-10 parts of magnesium, 6-8 parts of yttrium, 4-6 parts of molybdenum, 2-4 parts of rhenium and enough
Phosphorus, sulphur, iron；
S2: taking above-mentioned material to be matched, and wherein the gross mass accounting of a variety of materials is carbon 3.5%-3.9%, silicon 2.4%-
2.7%, manganese 0.29%-0.45%, cerium 0.03%-0.04%, magnesium 0.045%-0.06%, molybdenum 0.01%-0.02%, rhenium
0.02%-0.03%, phosphorus≤0.04%, sulphur≤0.018%, Cu:0.4%-0.8% surplus are iron, then throw proportion raw material
Enter and melted into medium-frequency induction furnace, guarantees that molten iron temperature is 1500 or more in melting process, obtain base iron after melting
An inoculation is carried out in stokehold, finally carries out desulfurization process；
S3: method is poured using dam-type according to base iron obtained in step S2, nodularization packet dykes and dams first are added in nodulizer and lean on furnace
The inovulant that granularity is 3-8mm is then covered on nodulizer surface by body side, is being covered one layer of iron filings, is then being placed one piece
It smashes flat with a thickness of the special pressing plate iron fork of 8mm, molten iron is added in nodularization packet and carries out spheroidising and late inoculation.In original
When molten iron is come out of the stove, the other side of dykes and dams is poured, prevents nodulizer premature reaction；
S4: spheroidization treatment temperature is maintained at 1450-1520 DEG C, and agent of skimming then is added into iron liquid, stirs, skim, and then will
After temperature is down to 1360-1420 DEG C, molten iron is quickly poured into sand mo(u)ld, nodular cast iron is obtained；
S5: taking the nodular cast iron in step S4, and be heated to 850-900 DEG C, by spheroidal graphite cast-iron after constant temperature 90-120min
It is put into 120-150 DEG C of salt bath and is cooled down, after cooling 3-5min, taking-up is air-cooled, obtains semi-finished product after being air-cooled to room temperature；
S6: the semi-finished product in step S5 are heated to 900-950 DEG C, 2-4h is kept the temperature, is cooled to the speed of 10-12 DEG C/min
550-600 DEG C, then be air-cooled to room temperature, will be air-cooled after casting be heated to 700-750 DEG C, 1-2h is kept the temperature, with the speed of 2-4 DEG C/min
Degree is cooled to 550-600 DEG C, then is air-cooled to room temperature, obtains optimizing components type spheroidal graphite cast-iron.
2. a kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron according to claim 1, it is characterised in that:
In step s 2, it needs to detect each element content in molten iron after raw material all melts, when constituent content inaccuracy, needs
It is adjusted until content meets recipe requirements.
3. a kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron according to claim 1, it is characterised in that:
Dykes and dams height in step S3 is 100-200mm.
4. a kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron according to claim 1, it is characterised in that:
Inovulant model Si65Ba5 in step S3, once breed middle inovulant dosage be iron liquid quality 0.4-0.6%, two
The secondary dosage for breeding middle inovulant is the 0.2-0.3% of iron liquid quality.
5. a kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron according to claim 1, it is characterised in that:
The silicon being added in step S2 is silicon carbide.
6. a kind of preparation method of optimizing components type QT600-3 spheroidal graphite cast-iron according to claim 1, it is characterised in that:
Salt bath in step S6 is salt made from earth containing a comparatively high percentage of sodium chloride bath.
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Cited By (4)
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| CN110396640A (en) * | 2019-08-28 | 2019-11-01 | 安徽普瑞明精密机械有限公司 | A kind of superduty ductile cast iron manhole cover production technology |
| CN111321266A (en) * | 2020-04-28 | 2020-06-23 | 含山县朝霞铸造有限公司 | Spheroidizing inoculation process for nodular cast iron |
| CN113084096A (en) * | 2021-04-12 | 2021-07-09 | 江苏精棱铸锻股份有限公司 | Method for manufacturing blade wheel hub of wind driven generator |
| CN113930570A (en) * | 2021-09-02 | 2022-01-14 | 江阴宏创动能科技有限公司 | Preparation process of high-quality diesel engine bearing cap |
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| CN108642369A (en) * | 2018-06-04 | 2018-10-12 | 含山县兴达球墨铸铁厂 | A kind of high-strength ductile cast iron and preparation method thereof |
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| CN110396640A (en) * | 2019-08-28 | 2019-11-01 | 安徽普瑞明精密机械有限公司 | A kind of superduty ductile cast iron manhole cover production technology |
| CN111321266A (en) * | 2020-04-28 | 2020-06-23 | 含山县朝霞铸造有限公司 | Spheroidizing inoculation process for nodular cast iron |
| CN113084096A (en) * | 2021-04-12 | 2021-07-09 | 江苏精棱铸锻股份有限公司 | Method for manufacturing blade wheel hub of wind driven generator |
| CN113084096B (en) * | 2021-04-12 | 2022-06-24 | 江苏精棱铸锻股份有限公司 | Method for manufacturing blade wheel hub of wind driven generator |
| CN113930570A (en) * | 2021-09-02 | 2022-01-14 | 江阴宏创动能科技有限公司 | Preparation process of high-quality diesel engine bearing cap |
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Application publication date: 20190607 |