CN108588321A - A kind of production technology of spheroidal graphite cast-iron - Google Patents
A kind of production technology of spheroidal graphite cast-iron Download PDFInfo
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- CN108588321A CN108588321A CN201810417320.5A CN201810417320A CN108588321A CN 108588321 A CN108588321 A CN 108588321A CN 201810417320 A CN201810417320 A CN 201810417320A CN 108588321 A CN108588321 A CN 108588321A
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- Prior art keywords
- iron
- nodularization
- molten iron
- spheroidal graphite
- graphite cast
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Classifications
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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
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a kind of production technologies of spheroidal graphite cast-iron, are related to spheroidal graphite cast-iron technical field.The present invention includes raw material selection, melting, nodularization and inoculation, takes a sample to check, and furnace charge selects the Z14 pig iron of low S contents, chemical composition：C>3.3%, Si1.25~1.60%, P≤0.06%, S≤0.04%, it is 1.6%~2.0% that nodulizer, which selects rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, addition, and silicon content is high in alloy, the vigorous reaction degree of magnesium can be significantly reduced, can also have certain inoculation(effect).Molybdenum and ambrose alloy Hastelloy and the constituent for debugging molten iron is added by temperature control in fusion process in the present invention, the spheroidal graphite cast-iron of final production has preferable corrosion resistance, and have the advantages of high intensity, toughness, wearability, resistance to serious heat and mechanical shock, high temperature resistant or low temperature, it can further be applied to more industries and field.
Description
Technical field
The invention belongs to spheroidal graphite cast-iron technical fields, more particularly to a kind of production technology of spheroidal graphite cast-iron.
Background technology
Spheroidal graphite cast-iron is a kind of high-strength cast iron material, and comprehensive performance is based on its excellent performance close to steel,
It has been successfully used to cast some stress complexity, the more demanding part of intensity, toughness, wearability.Spheroidal graphite cast-iron is sent out rapidly
Exhibition for be only second to gray cast iron, using very extensive cast iron materials.Spheroidal graphite cast-iron is to obtain ball by nodularization and inoculation
Shape graphite is effectively improved the mechanical performance of cast iron, in particular improves plasticity and toughness, also higher than carbon steel to obtain
Intensity.
More and more extensive with the application of spheroidal graphite cast-iron, market penetration is also higher and higher, and application potential is still very huge
Greatly, although existing much model spheroidal graphite cast-iron have the advantages that high intensity, plasticity and toughness, but since its is technologic molten
Refining process is simple, and the spheroidal graphite cast-iron ingredient of production is fixed, and does not have corrosion resistance, limits the application prospect of spheroidal graphite cast-iron.
Invention content
The purpose of the present invention is to provide a kind of production technology of spheroidal graphite cast-iron, by temperature control in fusion process be added molybdenum and
Ambrose alloy Hastelloy and the constituent for debugging molten iron, make the spheroidal graphite cast-iron of final production have preferable corrosion resistance, can
Further it is applied to more industries and field.
The present invention is achieved by the following technical solutions：
The present invention is a kind of production technology of spheroidal graphite cast-iron, including raw material selection, melting, nodularization and inoculation, is taken
Sample inspection；
SS01 raw material select
Furnace charge selects the Z14 pig iron of low S contents, chemical composition：C>3.3%, Si1.25~1.60%, P≤0.06%,
S≤0.04%；
It is 1.6%~2.0% that nodulizer, which selects rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, addition, is contained in alloy
Silicon amount is high, can significantly reduce the vigorous reaction degree of magnesium, can also have certain inoculation(effect), and due to anti-in magnesium and magnesium iron
Phase chemical combination, rare earth element Re can not neutralize tension-active element to nodularization element, to offset interference；
It is 0.8%~1.0% that inovulant, which selects FeSi75, addition, and inovulant pounds into the bulk of 5~25cm, and keeps
Totally, dry；
SS02 meltings
The Z14 pig iron is placed in induction melting furnace and carries out melting, after fusing, temperature is risen into 1380 DEG C of removing molten iron
The slag on surface takes base iron to carry out chemical composition analysis；
Temperature is risen to 1420 DEG C~1450 DEG C, ferrosilicon, ferromanganese, molybdenum, ambrose alloy Hastelloy is added, by chemical group by thermometric
It is adjusted at component requirements as follows：C3.65%~3.85%, Si1.8%~2.0%, Mn0.7%~0.9%, P<0.08%, S<
0.02%, Mo0.5%~0.7%, Cu0.5%~0.8%, Ni0.35%~0.5%, Re0.02%~0.045%,
Mg0.035%~0.06%；
SS03 nodularizations and inoculation
Nodulizer and 1/3 inovulant are first proportionally added into the one side at ladle bottom, first ball adding agent adds inovulant simultaneously again
Tamping, it should be the another side for placing the materials such as alloy that molten iron, which pours position, prevent molten iron from directly impacting alloy, first go out 2/3 iron
Water polo, after spheroidizing reacion, then go out remaining 1/3 molten iron, remaining 2/3 inovulant is uniformly added into molten iron and by molten iron
It stirs evenly；
SS04 takes a sample to check
It is stirred after molten iron reaction is tranquil and sampling of skimming, inspection nodularization degree, nodularization completion can then cast.
Further, the smelting furnace selection induction middle frequency furnace, its advantage is that heating speed is fast, the thermal efficiency is high, oxidation
Scaling loss is lighter, and it is less to absorb gas, it can thus be avoided increasing sulphur and the problem of phosphorus, makes P≤0.07% in molten iron, and S≤
0.05%.
Further, the height of the nodularization packet and diameter ratio are 2:1, in order to improve the absorptivity of nodulizer, increase ball
Change effect.
Further, the detection method of the nodularization degree use test wedge detection method, test piece section be 25mm ×
50mm is cooled to kermesinus, takes out hardening, if port is in silver gray, intermediate apparent shrinkage porosite, the recessed contracting in three sides is outstanding to have hit steel sound, soaks
There is calcium carbide taste, then nodularization is good.
The invention has the advantages that：
Molybdenum and ambrose alloy Hastelloy and the constituent for debugging molten iron is added by temperature control in fusion process in the present invention, finally
The spheroidal graphite cast-iron of production has preferable corrosion resistance, and has high intensity, toughness, wearability, resistance to serious heat and machinery
The advantages of impact, high temperature resistant or low temperature, it can further be applied to more industries and field.
Specific implementation mode
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
All other embodiment that art personnel are obtained without creative efforts belongs to the model that the present invention protects
It encloses.
Embodiment one
SS01 raw material select
Furnace charge selects the Z14 pig iron of low S contents, chemical composition：C>3.3%, Si1.25~1.60%, P≤0.06%,
S≤0.04%；
Nodulizer selects rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, and addition 1.6%, silicon content is high in alloy,
The vigorous reaction degree of magnesium can be significantly reduced, can also have certain inoculation(effect), and due to the anti-nodularization member in magnesium and magnesium iron
Phase chemical combination, rare earth element Re can not neutralize tension-active element to element, to offset interference；
Inovulant selects FeSi75, addition 0.8%, inovulant to pound into the bulk of 15cm, and keeps clean, dry；
SS02 meltings
The Z14 pig iron is placed in induction melting furnace and carries out melting, after fusing, temperature is risen into 1380 DEG C of removing molten iron
The slag on surface takes base iron to carry out chemical composition analysis；
Temperature is risen to 1420 DEG C, ferrosilicon, ferromanganese, molybdenum, ambrose alloy Hastelloy is added, by chemical composition tune by thermometric
It is whole as follows：C3.7%, Si 1.9%, Mn0.7%, P<0.08%, S<0.02%, Mo0.6%, Cu0.5%, Ni0.45%,
Re0.045%, Mg0.05%；
SS03 nodularizations and inoculation
Nodulizer and 1/3 inovulant are first proportionally added into the one side at ladle bottom, first ball adding agent adds inovulant simultaneously again
Tamping, it should be the another side for placing the materials such as alloy that molten iron, which pours position, prevent molten iron from directly impacting alloy, first go out 2/3 iron
Water polo, after spheroidizing reacion, then go out remaining 1/3 molten iron, remaining 2/3 inovulant is uniformly added into molten iron and by molten iron
It stirs evenly；
SS04 takes a sample to check
It is stirred after molten iron reaction is tranquil and sampling of skimming, inspection nodularization degree, nodularization completion can then cast.
Wherein, smelting furnace selection induction middle frequency furnace, its advantage is that heating speed is fast, the thermal efficiency is high, and oxidization burning loss is lighter,
It is less to absorb gas, it can thus be avoided the problem of increasing sulphur and phosphorus, makes P≤0.07% in molten iron, S≤0.05%.
Wherein, the height of nodularization packet and diameter ratio are 2:1, in order to improve the absorptivity of nodulizer, increase nodularization effect.
Wherein, it is 25mm × 50mm that the detection method of nodularization degree, which uses test wedge detection method, test piece section, is cooled to dark
Red takes out hardening, if port is in silver gray, intermediate apparent shrinkage porosite, the recessed contracting in three sides is outstanding to have hit steel sound, and immersion has calcium carbide taste, then
Nodularization is good.
Embodiment two
SS01 raw material select
Furnace charge selects the Z14 pig iron of low S contents, chemical composition：C>3.3%, Si1.25~1.60%, P≤0.06%,
S≤0.04%；
Nodulizer selects rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, and addition 1.8%, silicon content is high in alloy,
The vigorous reaction degree of magnesium can be significantly reduced, can also have certain inoculation(effect), and due to the anti-nodularization member in magnesium and magnesium iron
Phase chemical combination, rare earth element Re can not neutralize tension-active element to element, to offset interference；
Inovulant selects FeSi75, addition 0.9%, inovulant to pound into the bulk of 10cm, and keeps clean, dry；
SS02 meltings
The Z14 pig iron is placed in induction melting furnace and carries out melting, after fusing, temperature is risen into 1380 DEG C of removing molten iron
The slag on surface takes base iron to carry out chemical composition analysis；
Temperature is risen to 1430 DEG C, ferrosilicon, ferromanganese, molybdenum, ambrose alloy Hastelloy is added, by chemical composition tune by thermometric
It is whole as follows：C3.8%, Si 1.9%, Mn0.8%, P<0.08%, S<0.02%, Mo0.55%, Cu0.8%, Ni0.4%,
Re0.035%, Mg0.04%；
SS03 nodularizations and inoculation
Nodulizer and 1/3 inovulant are first proportionally added into the one side at ladle bottom, first ball adding agent adds inovulant simultaneously again
Tamping, it should be the another side for placing the materials such as alloy that molten iron, which pours position, prevent molten iron from directly impacting alloy, first go out 2/3 iron
Water polo, after spheroidizing reacion, then go out remaining 1/3 molten iron, remaining 2/3 inovulant is uniformly added into molten iron and by molten iron
It stirs evenly；
SS04 takes a sample to check
It is stirred after molten iron reaction is tranquil and sampling of skimming, inspection nodularization degree, nodularization completion can then cast.
Embodiment three
SS01 raw material select
Furnace charge selects the Z14 pig iron of low S contents, chemical composition：C>3.3%, Si1.25~1.60%, P≤0.06%,
S≤0.04%；
Nodulizer selects rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, and addition 1.9%, silicon content is high in alloy,
The vigorous reaction degree of magnesium can be significantly reduced, can also have certain inoculation(effect), and due to the anti-nodularization member in magnesium and magnesium iron
Phase chemical combination, rare earth element Re can not neutralize tension-active element to element, to offset interference；
Inovulant selects FeSi75, addition 0.85%, inovulant to pound into the bulk of 25cm, and keeps clean, dry；
SS02 meltings
The Z14 pig iron is placed in induction melting furnace and carries out melting, after fusing, temperature is risen into 1380 DEG C of removing molten iron
The slag on surface takes base iron to carry out chemical composition analysis；
Temperature is risen to 1450 DEG C, ferrosilicon, ferromanganese, molybdenum, ambrose alloy Hastelloy is added, by chemical composition tune by thermometric
It is whole as follows：C3.8%, Si 1.85%, Mn0.8%, P<0.08%, S<0.02%, Mo0.5%, Cu0.5%, Ni0.35%,
Re0.03%, Mg0.05%；
SS03 nodularizations and inoculation
Nodulizer and 1/3 inovulant are first proportionally added into the one side at ladle bottom, first ball adding agent adds inovulant simultaneously again
Tamping, it should be the another side for placing the materials such as alloy that molten iron, which pours position, prevent molten iron from directly impacting alloy, first go out 2/3 iron
Water polo, after spheroidizing reacion, then go out remaining 1/3 molten iron, remaining 2/3 inovulant is uniformly added into molten iron and by molten iron
It stirs evenly；
SS04 takes a sample to check
It is stirred after molten iron reaction is tranquil and sampling of skimming, inspection nodularization degree, nodularization completion can then cast.
Claims (4)
1. a kind of production technology of spheroidal graphite cast-iron, it is characterised in that：Including raw material selection, melting, nodularization and inoculation, take
Sample inspection；
SS01 raw material select
Furnace charge selects the Z14 pig iron of low S contents, chemical composition：C>3.3%, Si1.25~1.60%, P≤0.06%, S≤
0.04%；
It is 1.6%~2.0% that nodulizer, which selects rare earth ferrosilicomagnesium nodulizer FeSiMg8Re7, addition, silicon content in alloy
Height can significantly reduce the vigorous reaction degree of magnesium, can also have certain inoculation(effect), and due to the anti-nodularization in magnesium and magnesium iron
Phase chemical combination, rare earth element Re can not neutralize tension-active element to element, to offset interference；
It is 0.8%~1.0% that inovulant, which selects FeSi75, addition, and inovulant pounds into the bulk of 5~25cm, and keep it is clean,
It is dry；
SS02 meltings
The Z14 pig iron is placed in induction melting furnace and carries out melting, after fusing, temperature is risen to 1380 DEG C and removes molten iron surface
Slag, take base iron carry out chemical composition analysis；
Temperature is risen to 1420 DEG C~1450 DEG C, ferrosilicon, ferromanganese, molybdenum, ambrose alloy Hastelloy is added by thermometric, by chemical composition at
Divide and requires adjustment as follows：C3.65%~3.85%, Si1.8%~2.0%, Mn0.7%~0.9%, P<0.08%, S<
0.02%, Mo0.5%~0.7%, Cu0.5%~0.8%, Ni0.35%~0.5%, Re0.02%~0.045%,
Mg0.035%~0.06%；
SS03 nodularizations and inoculation
Nodulizer and 1/3 inovulant are first proportionally added into the one side at ladle bottom, first ball adding agent adds inovulant and consolidates again,
It should be the another side for placing the materials such as alloy that molten iron, which pours position, prevent molten iron from directly impacting alloy, first go out 2/3 molten iron ball
Change, after spheroidizing reacion, then go out remaining 1/3 molten iron, remaining 2/3 inovulant is uniformly added into molten iron and stirs molten iron
Uniformly；
SS04 takes a sample to check
It is stirred after molten iron reaction is tranquil and sampling of skimming, inspection nodularization degree, nodularization completion can then cast.
2. a kind of production technology of spheroidal graphite cast-iron according to claim 1, it is characterised in that：The smelting furnace selection induction
Middle frequency furnace, its advantage is that heating speed is fast, the thermal efficiency is high, and oxidization burning loss is lighter, and absorption gas is less, it can thus be avoided
The problem of increasing sulphur and phosphorus, makes P≤0.07% in molten iron, S≤0.05%.
3. a kind of production technology of spheroidal graphite cast-iron according to claim 1, it is characterised in that：The height of the nodularization packet with
Diameter ratio is 2:1, in order to improve the absorptivity of nodulizer, increase nodularization effect.
4. a kind of production technology of spheroidal graphite cast-iron according to claim 1, it is characterised in that：The detection of the nodularization degree
It is 25mm × 50mm that method, which uses test wedge detection method, test piece section, is cooled to kermesinus, takes out hardening, if port is in silver grey
Color, intermediate apparent shrinkage porosite, the recessed contracting in three sides is outstanding to have hit steel sound, and immersion has calcium carbide taste, then nodularization is good.
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| CN201810417320.5A CN108588321A (en) | 2018-05-04 | 2018-05-04 | A kind of production technology of spheroidal graphite cast-iron |
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| CN201810417320.5A CN108588321A (en) | 2018-05-04 | 2018-05-04 | A kind of production technology of spheroidal graphite cast-iron |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110592306A (en) * | 2019-09-29 | 2019-12-20 | 四川省川建管道有限公司 | Smelting and spheroidizing inoculation process for manhole cover casting |
| CN114277305A (en) * | 2021-12-31 | 2022-04-05 | 韶关市新世科壳型铸造有限公司 | Comprehensive performance nodular cast iron material for manufacturing rolling mill rotor and manufacturing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260818A (en) * | 2011-07-21 | 2011-11-30 | 芜湖市金贸流体科技股份有限公司 | High-silicon anticorrosion cast iron and manufacturing method thereof |
| CN105970076A (en) * | 2016-06-27 | 2016-09-28 | 含山县兴达球墨铸铁厂 | High-strength low-temperature-resisting spheroidal graphite cast iron and preparing method thereof |
| CN107354369A (en) * | 2017-06-20 | 2017-11-17 | 哈尔滨汽轮机厂有限责任公司 | A kind of spheroidal graphite cast-iron containing molybdenum used under 500 DEG C of high temperature and preparation method thereof |
| CN107723581A (en) * | 2017-08-23 | 2018-02-23 | 宁波市恒源铸造有限公司 | Corrosion resistant ductile iron and its casting method |
-
2018
- 2018-05-04 CN CN201810417320.5A patent/CN108588321A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260818A (en) * | 2011-07-21 | 2011-11-30 | 芜湖市金贸流体科技股份有限公司 | High-silicon anticorrosion cast iron and manufacturing method thereof |
| CN105970076A (en) * | 2016-06-27 | 2016-09-28 | 含山县兴达球墨铸铁厂 | High-strength low-temperature-resisting spheroidal graphite cast iron and preparing method thereof |
| CN107354369A (en) * | 2017-06-20 | 2017-11-17 | 哈尔滨汽轮机厂有限责任公司 | A kind of spheroidal graphite cast-iron containing molybdenum used under 500 DEG C of high temperature and preparation method thereof |
| CN107723581A (en) * | 2017-08-23 | 2018-02-23 | 宁波市恒源铸造有限公司 | Corrosion resistant ductile iron and its casting method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110592306A (en) * | 2019-09-29 | 2019-12-20 | 四川省川建管道有限公司 | Smelting and spheroidizing inoculation process for manhole cover casting |
| CN114277305A (en) * | 2021-12-31 | 2022-04-05 | 韶关市新世科壳型铸造有限公司 | Comprehensive performance nodular cast iron material for manufacturing rolling mill rotor and manufacturing method |
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Application publication date: 20180928 |