CN110066959A - A kind of high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur and its melting casting craft - Google Patents
A kind of high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur and its melting casting craft Download PDFInfo
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- CN110066959A CN110066959A CN201910488173.5A CN201910488173A CN110066959A CN 110066959 A CN110066959 A CN 110066959A CN 201910488173 A CN201910488173 A CN 201910488173A CN 110066959 A CN110066959 A CN 110066959A
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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
- C21C1/08—Manufacture of cast-iron
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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
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The present invention relates to a kind of high manganese Inoculation Gray Cast Iron materials of high-intensitive low-sulfur, and the component of the gray cast iron material is in terms of weight percentage are as follows: carbon 3.05-3.2%, silicon 1.85-2.05%, manganese 0.8-1.4%, phosphorus≤0.05%, sulphur < 0.05%.A kind of production technology producing the high manganese Inoculation Gray Cast Iron material of the high-intensitive low-sulfur is also provided, the present invention does not use only synthetic cast iron technology, applies silicon carbide and silicon barium zirconium inovulant, and the excellent formula casting mold condition of Iron Mould Coated Sand is utilized, cast out the high manganese Inoculation Gray Cast Iron of high-intensitive low-sulfur.
Description
Technical field
The present invention relates to casting field, the high manganese Inoculation Gray Cast Iron material of specifically a kind of high-intensitive low-sulfur and its melting are poured
Building technology.
Background technique
Gray cast iron refers to the cast iron with flake graphite, and fracture is in dark gray when because of fracture, therefore referred to as gray cast iron, yield
Account for 80% or more cast iron total output.Gray cast iron is divided into ferrite matrix gray cast iron, one ferrite matrix gray cast iron of pearlite, pearly-lustre
Body matrix gray cast iron can use different gray cast iron according to the difference of casting use direction, meet the requirement used, generally in liquid
Casting die using when need to use pearlite matrix gray cast iron.
Hydraulic part sampling point is close in the middle part of casting solid position, multiple sampling discovery there are hardness at this low, riser neck
The problems such as shrinkage porosite, exceeded graphite length.It is big to be analyzed the position thermal center region, while having riser feeding, so that the position heat
Excessively aggregation molten iron long-term heat preservation is to lead to that casting crystalline grain is coarse, graphite length is exceeded, lower hardness basic reason.However,
The sulfur content of existing gray cast iron is low with the strength of gray cast iron that moulding after the composition proportions such as Mn comes out all 0.05% or more, stone
Black form less stable.
And existing gray cast iron has only been used when melting pours and has once been bred, and be typically all with silicon iron inoculator into
Row is bred, and makes that iron liquid degree of purity is low, graphite grains are excessive.
Also, the mold of existing gray cast iron is single, and thick strip core strength is extremely difficult to require.
Summary of the invention
In view of the above-mentioned problems, the present invention provides and a kind of use synthetic cast iron technology, applies silicon carbide and silicon barium zirconium is pregnant
Based on educating agent, the high manganese Inoculation Gray Cast Iron material of high-intensitive low-sulfur of the excellent formula casting mold condition of Iron Mould Coated Sand is utilized.
The technical scheme of the invention to solve the technical problem is: a kind of high manganese Inoculation Gray Cast Iron of high intensity low-sulfur
Material, the component of the gray cast iron material is in terms of weight percentage are as follows: carbon 3.05-3.2%, silicon 1.85-2.05%, manganese 0.8-
1.4%, phosphorus≤0.05%, sulphur < 0.05%.
Preferably, the component of the gray cast iron material is in terms of weight percentage are as follows: carbon 3.12%, silicon 1.96%, manganese
1.2%, phosphorus 0.05%, sulphur 0.01%.
The present invention also provides a kind of melting casting crafts for producing the high manganese Inoculation Gray Cast Iron material of above-mentioned high-intensitive low-sulfur: packet
Include following steps:
1) broken steel, the pig iron, foundry returns, carburant are added in medium-frequency induction furnace, open electric furnace and carries out melting；
2) furnace temperature control is continued to heating 8-12 minutes within the scope of 1540-1550 DEG C；
3) molten iron is obtained from electric furnace by sample spoon, and each element in molten iron is contained by metallic element analyzer
Amount is detected, if off analysis keeps heating and the element lacked being added being adjusted, if ingredient qualification is quiet by molten iron
Set waiting cooling；
4) it skimmed, come out of the stove after molten iron temperature reduction,
5) during coming out of the stove, wrapped in breed: select mass percent be 0.5-0.6% silicon barium zirconium inovulant carry out
Once breed；
6) it is poured, in casting process, carries out current-following inoculation: siliceous/iron that selection mass percent is 0.25-0.3%/dilute
The inovulant of soil carries out late inoculation, keeps pouring temperature within the scope of 1320-1360 DEG C, by molten iron casting to hydraulic valve part
Type is intracavitary；
7) final casting is formed, the weight percent of the ingredient and each ingredient that are added in fusion process is as follows: broken steel: 50-
70%；Pig iron 15-25%；Foundry returns 10-30%；Carburant 3.2-3.9%.
Preferably, the inovulant of the current-following inoculation includes silicon strontium inoculant.
Preferably, hydraulic valve part described in step 6) is Sand-Faced Metal Mould Casting tool.
Preferably, the carburant is silicon carbide.
Preferably, carrying out composition proportion: broken steel: 62% using following mass percent in fusion process；The pig iron 21%；
Foundry returns 18.74%；Carburant 3.81%.
Preferably, in the final casting, the weight percent of ingredient and each ingredient are as follows: carbon 3.18%, silicon
1.95%, manganese 0.9%, phosphorus 0.03%, sulphur 0.03%.
Compared with prior art, the invention has the following advantages:
1, present invention employs synthetic cast iron technology, apply silicon carbide and silicon barium zirconium inovulant on the basis of, utilize swage
The excellent formula casting mold condition of sand is covered, realizes high-carbon, low-sulfur, Gao Meng,
2, alloy is not added, material is saved, reduces production cost, and reduces iron liquid and shrinks tendency, improves Mechanical processing of casting
Performance；
3, sulfur content of the present invention is all 0.05% hereinafter, the strength of gray cast iron come out with moulding after the composition proportions such as Mn is high,
Graphite form is extremely stable.
4, the present invention is used when melting pours and is bred twice, and is adopted silicon barium zirconium and bred as inovulant, and iron liquid is made
Degree of purity is high, graphite grains are uniform, pregnant effect is promoted obviously.The essence bred is the eutectic for going to influence iron liquid by inovulant
Reaction, good inoculation are that gray cast iron obtains the A type graphite of fine uniform, eliminates carbide and over-cooling structure, are reduced disconnected
Face sensibility and hardness scattered error improve the basic guarantee of mechanical castings and processing performance.
Detailed description of the invention
Fig. 1 is the income histomorphometric analysis figure of gray cast iron in the present invention；
Fig. 2 is the structural schematic diagram that Sand-Faced Metal Mould Casting has in the present invention.
Specific embodiment
Below in conjunction with Fig. 1, Fig. 2, the present invention will be described in detail, and illustrative examples of the invention and explanation are used to herein
Explain the present invention, but not as a limitation of the invention.
In the production of cast iron, S has always been considered as being a kind of harmful element.But studies have shown that S to the tissue of gray cast iron and
Performance has an important influence, especially for the high-strength gray cast iron using electro-smelting, however, in the iron liquid of electro-smelting
The content for entangling (S) and sulfide, directly affects nucleation ability and chilling tendency.And magnesium iron has strictly sulphur (S), phosphorus (P)
Requirement, S is the essential element for hindering spheroidization of graphite, and the main purpose of spheroidising is exactly to take off S, but spheroidal graphite cast-iron inoculation fade
Too low there is direct relation with w (S) amount fastly；So w (S) amount appropriate is necessary.W (S) control can be measured be lower than
When 0.05%, increases graphite nuclei particle using the nucleation of MgS to increase number of graphite ball, can preferably be organized and property
Energy.Solve makes the sulphur (S) in generation magnesium iron exceeded to serious shadow using traditional adding in the prior art caused by sulphur (S) amount
The problem of ringing the quality of magnesium iron.
Add Mn that the intensity and hardness of gray cast iron can be improved, but can increase (Mn) amount improve intensity and refined (S) amount and have
It closes.It is measured in higher cast iron at (S), (Mn) amount is higher, and the MnS field trash of formation is more.MnS can be used as the non-spontaneous shape of graphite
The core of core, promotes cast iron to be graphitized, but excessive MnS can assemble, and forms the MnS arrangement of local dense.Meanwhile iron liquid
The quantity of middle free S atom is reduced, and graphite will become smoothly, length, and the passivation effect of end is deteriorated, combined influence
As a result: being that Mn strengthens the alloying action of matrix and suppressed by MnS adverse effect, and in the iron liquid of higher CE
The effect for increasing sulphur is also destroyed by Mn, and gray cast iron properties is caused to reduce.Therefore, (Mn) amount should be integrated with refined (S) selection measured examines
Consider, it is generally recognized that when adding (S)≤O.05%, consider that (Mn) is measured to add (Mn)=1.7w (S)+0.3.
The present invention selects electrosmelting of intermediate frequency in smelting technology again, under same raw materials, compared with furnace cupola, and overheat
Temperature is high, and the melting and heat preservation time is long, easily causes decarburization.When same chemical component, the casting strength and hardness poured into is high,
Chilling tendency is big, and graphite length is short, and is easy to produce D, E type graphite；The mobility of iron liquid is poor, shrinks and increases, and easily causes each
Kind casting flaw.When being greater than 50% using steel scrap amount, the soaking time of iron liquid increases, and above-mentioned phenomenon is more serious.Permitted in the past
More inovulants are produced for furnace cupola, and present melting condition changes, and inovulant is also required to change.Therefore, high
The research of intensity Inoculation Cast Iron develops and adapts to high CE (3.9%~4.2%), high Si/C than the inovulant of gray cast iron, improves
Domestic casting material trade mark grade.
Silicon carbide in the present invention is a kind of raw core agent of silicon substrate, and fusing point is non-fusible in iron liquid up to 2700 DEG C, by SiC+Fe
=FeSi+C (non-equilibrium graphite) is melted in iron liquid, and the Si in formula in SiC is in conjunction with Fe, remaining C, that is, non-equilibrium graphite, as
The core of Graphite Precipitation.And silicon carbide or good deoxidier, gray cast iron, spheroidal graphite cast-iron and malleable cast iron all pass through
This reaction of SiC+FeO=Si+Fe+CO, the content of FeO and MnO in slag is reduced with SiC, so that purifying molten iron, reduces furnace wall
Oxidation extends the furnace wall service life, and silicon carbide can achieve the purpose for increasing silicon, carburetting.Silicon carbide is a kind of with " plentiful core
The substance of the heart " laudatory title, its additive as cast-iron alloy reduce casting chilling tendency, enhance graphite nucleation ability and increasing
Add graphite nucleating center, obtain the Eutectic Cell Number of moderate number, form satisfactory graphite shape and distribution, applies synthesis
Steel scrap ratio is excessively high after cast iron smelting technique, in furnace charge when causing iron liquid core number very few, and the nucleating effect of silicon carbide can play
Crucial effect.We compare casting metallographic structure by not plus silicon carbide and addition 1% silicon carbide, two kinds of melting process
A certain amount of silicon carbide is added when compared with, melting and has obvious effects on to improving metallurgical quality, improve graphite form.
The present invention is bred in packet using breeding twice, i.e., and current-following inoculation.When being bred using silicon barium zirconium inovulant, due to closing
At cast iron because using a large amount of steel scrap and carburant, thus increase nitrogen content in iron liquid sharply, nitrogen can be in iron liquid
For the stabilizer of carbide, promote the formation of carbide, it has an impact to growth of graphite process, and pearlite can be promoted to be formed.
In addition nitrogen can be such that graphite leaf length shortens, and bending degree increases, and end passivation, eutectic cell refinement and pearlite fraction increase, from
And improve its mechanical property.Zirconium can generate ZrC, Al3Zr, ZrN in iron liquid, reduce the dissolved nitrogen in iron liquid, substantially eliminate casting
The nitrogen hole defect of part, while increasing precipitation and refinement austenite dendrites, increase graphite crystallization core and promote iron liquid graphitization, mentions
The intensity of high cast iron.
Current-following inoculation bonded hard ferrite magnet is lower and the incubation time is delayed, to significantly reduce inoculation fade phenomenon, raising is bred
Effect.The gray iron casting high to consistency requirements, is typically chosen 0.05%~0.1% silicon strontium inoculant.Silicon strontium inoculant energy
It enough effectively facilitates eutectic graphite, reduce the spoken parts in traditional operas of iron liquid, but do not dramatically increase Eutectic Cell Number, the shrinkage porosite for not increasing iron liquid inclines
To reduction casting leakage with obvious action.Therefore, it is cast for being easy to produce the thin-wall high intensity ash of spoken parts in traditional operas and easy to leak
Iron castings (such as: cylinder body) can be selected inovulant containing sr and be bred.To steel scrap ratio in electric induction furnace melting and furnace charge compared with
Greatly, w (S) is measured for lower iron liquid, and inovulant effect above-mentioned is not significant, and particularly suitable with RESiFe inovulant.
A small amount of RE (rhenium) can also eliminate Pb (lead) and Bi (bismuth) to the adverse effect of gray cast iron flake graphite form, improve fade resistance
Can, supercooling hectare is reduced to the formation of reduction D, E type graphite and spoken parts in traditional operas improves the uniformity of pregnant effect, to significantly improve casting
The intensity and plasticity of part, improve the machinability of cast iron.In gray cast iron, nitrogen shortens graphite leaf length, and bending degree increases
Add, end passivation, length-width ratio reduces, to make its intensity and elasticity modulus increase, especially when N and RE elements compounding is added
Effect is more significant.
The present invention carries out moulding using Sand-Faced Metal Mould Casting tool, and the Sand-Faced Metal Mould Casting tool has sand-spraying hole 1 and fluorine sand
Layer 2 is iron layer 3 outside fluorine layer of sand, which makes sand mold integral strength high, indeformable, and adaptability is extensive, and casting is easily de-
Mould, and position reliable, precision height.And Sand-Faced Metal Mould Casting also has the characteristics that permanent mold casting, the casting mold of iron is in molten metal
There is apparent cold shock to act in crystallization process, casting crystalline grain degree can be made to refine, to improve the comprehensive strength of casting, while again
Presence due to there is close-over avoids the weakness of permanent mold casting, and casting will not generate spoken parts in traditional operas, can as cast condition life for ironcasting
Produce various materials, without heat treatment, and rigidity it is high, without making a concession, have good cooling condition.Below with three embodiments to this
Invention elaborates:
Embodiment one:
A kind of high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur, component is in terms of weight percentage are as follows:
Carbon 3.18%, silicon 1.95%, manganese 0.9%, phosphorus 0.03%, sulphur 0.03%.
A kind of melting casting craft of the high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur, comprising the following steps:
1) broken steel, the pig iron, foundry returns, carburant are added in medium-frequency induction furnace, open electric furnace and carries out melting；The increasing
Carbon agent is silicon carbide.
2) furnace temperature control is continued to heating 10 minutes within the scope of 1500 DEG C；
3) molten iron is obtained from electric furnace by sample spoon, and each element in molten iron is contained by metallic element analyzer
Amount is detected, if off analysis keeps heating and the element lacked being added being adjusted, if ingredient qualification is quiet by molten iron
Set waiting cooling；
4) it skimmed, come out of the stove after molten iron temperature reduction,
5) during coming out of the stove, wrapped in breed: select mass percent be 0.56% silicon barium zirconium inovulant carry out one
It is secondary to breed；
6) be poured, in casting process, carry out current-following inoculation: selecting mass percent is 0.28% siliceous/iron/rare earth
Inovulant carries out late inoculation, and the inovulant of the current-following inoculation includes silicon strontium inoculant.Keep pouring temperature in 1350 DEG C of models
It is in enclosing, molten iron casting is intracavitary to hydraulic valve part type；The hydraulic valve part is Sand-Faced Metal Mould Casting tool.
7) final casting is formed, the weight percent of the ingredient and each ingredient that are added in fusion process is as follows: broken steel:
62%；The pig iron 21%；Foundry returns 18.74%；Carburant 3.81%.
Embodiment two:
A kind of high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur, component is in terms of weight percentage are as follows: carbon 3.05%, silicon
1.85%, manganese 0.8%, phosphorus 0.05%, sulphur 0.049%.
A kind of melting casting craft of the high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur, comprising the following steps:
1) broken steel, the pig iron, foundry returns, carburant are added in medium-frequency induction furnace, open electric furnace and carries out melting；The increasing
Carbon agent is silicon carbide.
2) furnace temperature control is continued to heating 8 minutes within the scope of 1540 DEG C；
3) molten iron is obtained from electric furnace by sample spoon, and each element in molten iron is contained by metallic element analyzer
Amount is detected, if off analysis keeps heating and the element lacked being added being adjusted, if ingredient qualification is quiet by molten iron
Set waiting cooling；
4) it skimmed, come out of the stove after molten iron temperature reduction,
5) during coming out of the stove, wrapped in breed: select the silicon barium zirconium inovulant that mass percent is 0.5% to carry out primary
It breeds；
6) be poured, in casting process, carry out current-following inoculation: selecting mass percent is 0.25% siliceous/iron/rare earth
Inovulant carries out late inoculation, and the inovulant of the current-following inoculation includes silicon strontium inoculant.Keep pouring temperature in 1320 DEG C of models
It is in enclosing, molten iron casting is intracavitary to hydraulic valve part type；The hydraulic valve part is Sand-Faced Metal Mould Casting tool.
7) final casting is formed, the weight percent of the ingredient and each ingredient that are added in fusion process is as follows: broken steel:
50%；The pig iron 15%；Foundry returns 10%；Carburant 3.2%.
Embodiment three: a kind of high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur, component is in terms of weight percentage are as follows: carbon
3.2%, silicon 2.05%, manganese 1.4%, phosphorus 0.01%, sulphur 0.01%.
The component of the gray cast iron material is in terms of weight percentage are as follows: carbon 3.12%, silicon 1.96%, manganese 1.2%, phosphorus
0.05%, sulphur 0.01%.In the final casting, the weight percent of ingredient and each ingredient are as follows: carbon 3.18%, silicon
1.95%, manganese 0.9%, phosphorus 0.03%, sulphur 0.03%.
A kind of melting casting craft of the high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur, comprising the following steps:
1) broken steel, the pig iron, foundry returns, carburant are added in medium-frequency induction furnace, open electric furnace and carries out melting；The increasing
Carbon agent is silicon carbide.
2) furnace temperature control is continued to heating 12 minutes within the scope of 1550 DEG C；
3) molten iron is obtained from electric furnace by sample spoon, and each element in molten iron is contained by metallic element analyzer
Amount is detected, if off analysis keeps heating and the element lacked being added being adjusted, if ingredient qualification is quiet by molten iron
Set waiting cooling；
4) it skimmed, come out of the stove after molten iron temperature reduction,
5) during coming out of the stove, wrapped in breed: select the silicon barium zirconium inovulant that mass percent is 0.6% to carry out primary
It breeds；
6) be poured, in casting process, carry out current-following inoculation: selecting mass percent is 0.3% siliceous/iron/rare earth
Inovulant carries out late inoculation, and the inovulant of the current-following inoculation includes silicon strontium inoculant.Keep pouring temperature in 1360 DEG C of models
It is in enclosing, molten iron casting is intracavitary to hydraulic valve part type；The hydraulic valve part is Sand-Faced Metal Mould Casting tool.
7) final casting is formed, the weight percent of the ingredient and each ingredient that are added in fusion process is as follows: broken steel:
70%；The pig iron 25%；Foundry returns 30%；Carburant 3.9%.
It is provided for the embodiments of the invention technical solution above to be described in detail, specific case used herein
The principle and embodiment of the embodiment of the present invention are expounded, the explanation of above embodiments is only applicable to help to understand this
The principle of inventive embodiments；At the same time, for those skilled in the art, according to an embodiment of the present invention, in specific embodiment party
There will be changes in formula and application range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (8)
1. a kind of high manganese Inoculation Gray Cast Iron material of high intensity low-sulfur, it is characterised in that: the component of the gray cast iron material is with weight
Percentage indicates are as follows: carbon 3.05-3.2%, silicon 1.85-2.05%, manganese 0.8-1.4%, phosphorus≤0.05%, sulphur < 0.05%.
2. the high manganese Inoculation Gray Cast Iron material of high-intensitive low-sulfur according to claim 1, it is characterised in that: the gray cast iron material
Component in terms of weight percentage are as follows: carbon 3.12%, silicon 1.96%, manganese 1.2%, phosphorus 0.05%, sulphur 0.01%.
3. a kind of melting casting craft of the high manganese Inoculation Gray Cast Iron material of high-intensitive low-sulfur as claimed in claim 1 or 2, special
Sign is: the following steps are included:
1) broken steel, the pig iron, foundry returns, carburant are added in medium-frequency induction furnace, open electric furnace and carries out melting；
2) furnace temperature control is continued to heating 8-12 minutes within the scope of 1540-1550 DEG C；
3) molten iron is obtained from electric furnace by sample spoon, and by metallic element analyzer to each constituent content in molten iron into
Row detection, if off analysis keeps heating and the element lacked is added is adjusted, if ingredient qualification stands molten iron etc.
Wait cool down；
4) it skimmed, come out of the stove after molten iron temperature reduction,
5) during coming out of the stove, wrapped in breed: select the silicon barium zirconium inovulant that mass percent is 0.5-0.6% to carry out primary
It breeds；
6) be poured, in casting process, carry out current-following inoculation: selecting mass percent is siliceous/iron/rare earth of 0.25-0.3%
Inovulant carries out late inoculation, keeps pouring temperature within the scope of 1320-1360 DEG C, by molten iron casting to hydraulic valve part type chamber
It is interior；
7) final casting is formed, the weight percent of the ingredient and each ingredient that are added in fusion process is as follows: broken steel: 50-70%；
Pig iron 15-25%；Foundry returns 10-30%；Carburant 3.2-3.9%.
4. the melting casting craft of the high manganese Inoculation Gray Cast Iron material of high-intensitive low-sulfur according to claim 3, it is characterised in that:
The inovulant of the current-following inoculation includes silicon strontium inoculant.
5. the melting casting craft of the high manganese Inoculation Gray Cast Iron material of high-intensitive low-sulfur according to claim 3, it is characterised in that:
Hydraulic valve part described in step 6) is Sand-Faced Metal Mould Casting tool.
6. the melting casting craft of the high manganese Inoculation Gray Cast Iron material of high-intensitive low-sulfur according to claim 3, it is characterised in that:
The carburant is silicon carbide.
7. the melting casting craft of the high manganese Inoculation Gray Cast Iron material of high-intensitive low-sulfur according to claim 6, it is characterised in that:
Composition proportion: broken steel: 62% is carried out using following mass percent in fusion process；The pig iron 21%；Foundry returns 18.74%；Increase
Carbon agent 3.81%.
8. the melting casting craft of the high manganese Inoculation Gray Cast Iron material of high-intensitive low-sulfur according to claim 3, it is characterised in that:
In the final casting, the weight percent of ingredient and each ingredient are as follows: carbon 3.18%, silicon 1.95%, manganese 0.9%, phosphorus
0.03%, sulphur 0.03%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111270039A (en) * | 2020-04-02 | 2020-06-12 | 江苏力源金河铸造有限公司 | Smelting process for reducing D, E type graphite in surface matrix structure of gray iron piece |
| CN113355588A (en) * | 2021-05-11 | 2021-09-07 | 南通虹冈铸钢有限公司 | High-strength hypoeutectic cast iron material and manufacturing method thereof |
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| CN111270039B (en) * | 2020-04-02 | 2021-10-26 | 江苏力源金河铸造有限公司 | Smelting process for reducing D, E type graphite in surface matrix structure of gray iron piece |
| CN113355588A (en) * | 2021-05-11 | 2021-09-07 | 南通虹冈铸钢有限公司 | High-strength hypoeutectic cast iron material and manufacturing method thereof |
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