CN108642366A - A kind of alterant and its melting method for thin-wall high intensity gray cast iron - Google Patents
A kind of alterant and its melting method for thin-wall high intensity gray cast iron Download PDFInfo
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- CN108642366A CN108642366A CN201810465165.4A CN201810465165A CN108642366A CN 108642366 A CN108642366 A CN 108642366A CN 201810465165 A CN201810465165 A CN 201810465165A CN 108642366 A CN108642366 A CN 108642366A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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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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Abstract
A kind of alterant and its melting method for thin-wall high intensity gray cast iron, alterant ingredient and weight ratio content：Rare earth 3.0 8.0%, silicon 15.0 30.0%, chromium 10.0 18.0%, zirconium 1.0 4.0%, manganese 7.0 14.0%, calcium 0.2 1.5%, surplus are iron and inevitable trace element 24.5 63.8%.The alterant, fusing point is low, dissolubility is good, is not easy to form Hard Inclusion；Component is uniform after being melted, and is not likely to produce segregation, and casting quality is stablized；Alterant, which taps a blast furnace, wraps interior 3 5mm of grain size using granularity, is not easy to be involved in slag in packet or be attached in containment wall；Graphite in Cast Iron quantity can be increased, make flake graphite sharp corner passivation, to improve mechanical castings；The alterant that new alterant melting method obtains not only had met the requirement of high-strength gray cast iron intensity, but also reduced shrinkage, while can substitute or reduce again the addition of molybdenum, evanohm.
Description
Technical field:
The invention belongs to material technology fields, are related to a kind of gray cast iron alterant, more particularly to a kind of for thin-wall high intensity
The alterant and its melting method of gray cast iron.
Background technology:
It is well known that gray cast iron is a kind of cast iron with flake graphite, because fracture is in dark gray when it is broken, therefore it is known as ash casting
Iron, main component are iron, carbon, silicon, manganese, sulphur, phosphorus, are most widely used cast iron.Its mechanical property, compactness are less than compacted iron, especially
It is that thin-wall high intensity gray cast iron is widely used in engine cylinder body, on cylinder cap, but if alloy addition is excessive, casting is received
Contracting tendency is larger, and casting leakage rate is higher.The quality of cylinder body and cylinder head casting directly affects the service life of diesel engine
And performance.
The numerous technological factors for influencing mechanical castings are the difficult points of gray cast iron production, such as furnace charge, chemical composition, are come out of the stove
Temperature, innoculant adding quantity, pouring temperature etc..Wherein inoculation is extremely critical, it can change the graphite form and base of casting
Body tissue, to influence the mechanical property of casting.As the alterant used in the pouring ladle of stokehold together with inovulant, make up
Inovulant is improving mechanical castings, reduce alloy addition, reduce the deficiency in terms of casting shrinks tendency.It prepares rotten
The difference of agent method determines the difference of the fusing point height and application method of alterant, also determines the difference of its using effect.
（Referring to；Wang Chunqi, publishing house of University Of Tianjin, Preparation of Castiron theory and practice）.
Alterant is the new material used in the production of thin-walled gray iron, it can not only improve the mechanical property of gray cast iron, replace
Generation or the addition for reducing molybdenum-iron, ferrochrome reduce contraction tendency when Liquid Gray Iron solidification, increase graphite, improve
Casting graphite form and matrix reduce influence of the minimum gas element to casting quality in furnace charge.
The alterant that domestic-developed uses at present is that different-alloy mechanical mixture substance or two alloys are melted
The mechanical mixture substance of intermediate alloy and other alloys.The patent of invention that State Intellectual Property Office 2012.11.28 is announced is " a kind of
High-strength gray cast iron alterant and its Metamorphism treatment technique ", application number；201210330657.5；And 2012.12.12 is announced
Patent of invention " a kind of high-strength gray cast iron alterant and its Metamorphism treatment technique ", application number 201210330659.4；It is above-mentioned
Two patents all use different-alloy mechanical mix techniques to make alterant.Since the alloy melting point height that the two uses is different,
The high alloy granularity of fusing point is added in use, the high alloy such as chromium, zirconium etc. of the big fusing point of granularity in pouring ladle no more than 1mm,
It can not be completely dissolved, it is easy to Hard Inclusion is formed in casting, to influence the mechanical property and processing performance of casting.Even if becoming
Matter agent granularity is less than 1mm, and Hard Inclusion is also will appear when tapping temperature is relatively low；Second, when alterant granularity is not more than 1mm,
It being easy to be involved in the slag of iron liquid with iron liquid when being added in iron liquid, finally swims in molten iron surface, when slagging-off, is clawed, or
It is attached on pouring ladle containment wall or packet bottom, influences using effect；The alterant each element ingredient of third, mechanical mixture is not melted
Ingredient it is uniform, be susceptible to segregation phenomena, fluctuated so as to cause same a collection of cast properties, casting quality is unstable；The
Four, compound addition nitrogen component in above-mentioned alterant, although iron liquid performance can be improved, to largely use resinamines sand core and
Using nitrogenous carburant and large scale steel scrap, the casting of electro-smelting iron liquid casting, several nitrogen quantity are added to the content of very little, just
It will appear crack shape nitrogen pore（Referring to；Chinese Mechanical Engineering Society casts branch, casts handbook second edition " cast iron " of volume 1）.On
State component and its Metamorphism treatment technique that two patents lay particular emphasis on alterant.
Invention content:
In order to overcome the shortcomings of described in background technology, the present invention provides a kind of alterants for thin-wall high intensity gray cast iron
And its melting method.The alterant component and its melting method main purpose is exactly to overcome above two alterant machine
The shortcomings that tool mixed preparing；Alterant of the present invention, using stabilization simple for process, fusing point is low, solution rate is fast, dissolubility
It is good, it is not easy to form Hard Inclusion；Component is uniform after the alterant is melted, and is not likely to produce segregation, and casting quality is stablized；The change
Matter agent fusing point is low, using the grain size 3-5mm of granularity in the packet that taps a blast furnace, is not easy to be involved in slag in packet or is attached on packet bottom and containment wall
On；The alterant is used in thin-wall high intensity gray cast iron, can be increased Graphite in Cast Iron quantity, be kept flake graphite wedge angle blunt
Change, graphite shorten it is thicker, to improve mechanical castings；Simultaneously in use, the alterant can substitute or subtract
The addition of few molybdenum, evanohm changes dissolving and coagulating property of the chromium in iron liquid, reduces the contraction tendency of Thin Section Gray Iron Castings.
Zirconium is added in the melted alterant with background technology mesometamorphism agent a great difference, zirconium be used as at high temperature under high pressure it is resistance to
The chemical materials of erosion can not only improve the graphite form of casting, improve mechanical property, and can neutralize more in iron liquid
Nitrogen content reduces the probability that casting crack shape stomata occurs.The alterant lays particular emphasis on component and melting method.
In order to achieve the above-mentioned object of the invention, the present invention uses following technical proposals；
A kind of alterant for thin-wall high intensity gray cast iron, the alterant ingredient and content are（By weight）：Rare earth
（RE）3.0-8.0%, silicon (Si）15.0-30.0%, chromium (Cr) 10.0-18.0%, zirconium (Zr) 1.0-4.0%, manganese (Mn) 7.0-
14.0%, calcium（Ca）0.2-1.5%, surplus are iron（Fe）And inevitable trace element 24.5-63.8%.
The melting method of the alterant for thin-wall high intensity gray cast iron, is as follows：
1）, check before melting：
A. it is whether normal that 500Kg medium-frequency induction furnaces are first checked for, can be fed after confirming normally；
B. it needs to clean out on the barrier around electric furnace before blow-on power transmission；
2）, feed before blow-on power transmission：
Furnace bottom first spreads one layer of low-carbon waste steel in proportion, is then proportionally added into ferrochrome, ferromanganese, ferrosilicon successively；
3）, fusing and charging process：
A. after electric furnace power transmission, furnace charge melting situation in stove should be observed at any time；
B. it finds that when material position declines furnace charge should be added in time；
When c. finding that material position does not decline for a long time, should have a power failure observation, and disclosed with drill rod smash furnace charge in time, until the furnace charge that will be put up a shed
It smashes and falls or tilt furnace body fusing, ensure that furnace charge is continuous up and down；
When d. finding to there is the upper solid-state furnace charge surface of liquid alloy liquid floating to form crust, should the processing of power failure immediately, crust is smashed up,
So that furnace charge is transparent in stove；
When e. there are a large amount of liquid furnace charges, it is successively proportionally added into zirconium ferrosilicon, calcium-silicon and rare earth ferrosilicon successively；
F. after waiting for that all furnace charges are added, then when having found that flare is emerged, using the method adjustment furnace charge position manually stirred,
Or fire door is closed with furnace access cap, and suitably reduce power transmission power；When fusing finishes observation, electric furnace power transmission is given in stopping, being existed with drill rod
Stirring in stove；
4）, cast of coming out of the stove：
After waiting for that furnace charge all melts in electric furnace, then power transmission can come out of the stove for 4--5 minutes；
Before coming out of the stove, cooling bath is cleared up, smear alcohol paint or equably spreads last layer powder siccative in cooling bath inner surface；Igniting
Drying；
Pouring temperature of coming out of the stove is controlled at 1300 DEG C -1350 DEG C, has not only prevented the excessive scaling loss of alloy, but also high-melting-point alloy is avoided not to be melt
Change；
5）, it is broken：
Alterant is collected after coming out of the stove 12 hours, after collection first with hammer by alloy breaks down at no more than 100mm bulk, then be crushed
Machine is broken into suitable lumpiness；
6）, examine, mark and preserve：
Inspection should be sampled in time after alterant is broken；It is stored in dry polybag interior sealing after meeting aforementioned vermiculizer ingredient,
And make upper suitable mark；Underproof melted alloy is continuing with as foundry returns.
By adopting the above-described technical solution, the present invention has the advantages that；
Alterant component and its melting method of the present invention for high-strength gray cast iron, main purpose are exactly to overcome
The shortcomings that existing alterant；Using melting method of the present invention, qualified alterant can not only be stably produced, and
Using alterant of the present invention, using stabilization simple for process, dissolubility is good, is less prone to component segregation, Hard Inclusion, glues
The defects of packet, casting leakage, substitutes or reduces the addition of molybdenum, evanohm, not only reduces being produced into for high-strength gray cast iron
This, decreases the contraction tendency of casting, and the gray iron casting being particularly suitable on production diesel engine reduces oozing for casting
Leak rate；Since alterant of the present invention has used zirconium, not Nitrogen element, to which the generation for reducing crack shape nitrogen pore is general
Rate.
Specific implementation mode：
The present invention can be explained in more detail by the following examples, the invention is not limited in the following examples；
A kind of alterant component for high-strength gray cast iron；
The alterant component content（By weight）：
Rare earth (RE) 3.0-8.0%；
Silicon (Si）15.0-30.0%；
Chromium (Cr) 10.0-18.0%；
Zirconium (Zr) 1.0-4.0%；
Manganese (Mn) 7.0-14.0%
Calcium（Ca）0.2-1.5%；
Surplus is iron (Fe) or inevitable trace element 24.5-63.8%.
The alterant melting method for high-strength gray cast iron, concrete operation step are；
1）, check before melting：
A. it is whether normal that 500Kg medium-frequency induction furnaces are first checked for, can be fed after confirming normally；
B. it needs to clean out on the barrier around electric furnace before blow-on power transmission；
2）, feed before blow-on power transmission：
Furnace bottom first spreads one layer of low-carbon waste steel in proportion, convenient for there is molten iron appearance as early as possible, reduces smelting time, avoids in fusion process
The scaling loss of alloy, reduces the cost, and is then proportionally added into ferrochrome, ferromanganese, ferrosilicon successively；
3）, fusing and charging process：
A. after electric furnace power transmission, furnace charge melting situation in stove should be observed at any time；
B. it finds that when material position declines furnace charge should be added in time；
When c. finding that material position does not decline for a long time, should have a power failure observation in time, be used in combination drill rod to disclose and smash furnace charge, until the stove that will be put up a shed
Material, which is smash, falls or tilts furnace body fusing, ensures that furnace charge is continuous up and down；
When d. finding to there is the upper solid-state furnace charge surface of liquid alloy liquid floating to form crust, should the processing of power failure immediately, crust is smashed up,
So that furnace charge is transparent in stove；
When e. there are a large amount of liquid furnace charges, it is successively proportionally added into zirconium ferrosilicon, calcium-silicon and rare earth ferrosilicon successively, avoids too early
Addition causes burning loss of alloy, influences the ingredient of alterant, while the addition of zirconium not only improves the graphite form of casting, improves mechanics
Performance, and nitrogen content more in iron liquid is neutralized, reduce the probability that casting crack shape stomata occurs；
F. after waiting for that all furnace charges are added, then when having found that flare is emerged, using the method adjustment furnace charge position manually stirred,
Or close fire door with furnace access cap；And suitably reduce power transmission power；After fusing, electric furnace power transmission is given in stopping, with drill rod in stove
Stirring keeps the alterant each element ingredient being melted in stove uniform, the segregation phenomena for avoiding mechanical mixture from being susceptible to；
4）, cast of coming out of the stove：
After waiting for that furnace charge all melts in electric furnace, then power transmission can come out of the stove for 4--5 minutes；
Before coming out of the stove, cooling bath is cleared up, smear alcohol paint or equably spreads last layer powder siccative in cooling bath inner surface；Igniting
Drying；
Pouring temperature of coming out of the stove is controlled at 1300 DEG C -1350 DEG C, has not only prevented the excessive scaling loss of alloy, but also high-melting-point alloy is avoided not to be melt
Change；
5）, it is broken：
Alterant is collected after coming out of the stove 12 hours, after collection first with hammer by alloy breaks down at no more than 100mm bulk, then be crushed
Machine is broken into suitable lumpiness, prevents the uneven influence using effect of alterant granularity；
6）, examine, mark and preserve：
Inspection should be sampled in time after alterant is broken；It is stored in dry polybag interior sealing after meeting aforementioned alterant ingredient,
And make upper suitable mark；Underproof melted alloy is used as foundry returns.
According to previous process steps, the embodiment of following several groups of heterogeneities proportioning is provided；
Embodiment one（It prepares）：
Alterant chemical composition（By weight）：Rare earth (RE) 5.2%, silicon (Si）23.2%, chromium (Cr) 17.0%, zirconium (Zr)
4.0%, manganese (Mn) 8.1%, calcium（Ca）1.5%, surplus is iron (Fe) or inevitable impurity.
The alterant of mentioned component is melted, using following raw materials and proportioning:Rare earth ferrosilicon（FeSiRE）32.0%, silico-calcium
Alloy（FeSiCa）9.0%, ferrosilicon (FeSi) 2.0%, ferrochrome (FeCr) 29.0%, ferromanganese（FeMn）13.0%, zirconium ferrosilicon
（FeSiZr）14.0%, remaining steel scrap（Fe）1.0%.According to the above proportioning, raw material are added in electric furnace, molten by following smelting technology
System.
The same previous process steps of melting technology.
Embodiment two（It prepares）：
Alterant chemical composition（By weight）：Rare earth (RE) 5.5%, silicon (Si）20.2%, chromium (Cr) 14.1%, zirconium (Zr)
2.1%, manganese (Mn) 14.0%6, calcium（Ca）0.8%, surplus is iron (Fe) or inevitable impurity.
The alterant of mentioned component is melted, using following raw materials and proportioning:Rare earth ferrosilicon（FeSiRE）36.0%, silico-calcium
Alloy（FeSiCa）5.0%, ferrosilicon (FeSi) 1.5%, ferrochrome (FeCr) 26.0%, ferromanganese（FeMn）22.0%, zirconium ferrosilicon
（FeSiZr）7.5%, remaining steel scrap（Fe）2.0%.According to the above proportioning, raw material are added in electric furnace, molten by following smelting technology
System.
The same previous process steps of melting technology.
Embodiment three（It prepares）：
Alterant chemical composition（By weight）：Rare earth (RE) 8.0%, silicon (Si）30.0%, chromium (Cr) 10.0%, zirconium (Zr)
1.0%, manganese (Mn) 7.0%, calcium（Ca）0.4%, surplus is iron (Fe) or inevitable impurity.
The alterant of mentioned component is melted, using following raw materials and proportioning:Rare earth ferrosilicon（FeSiRE）51.0%, silico-calcium
Alloy（FeSiCa）2.5%, ferrosilicon (FeSi) 7.0%, ferrochrome (FeCr) 18.5%, ferromanganese（FeMn）13.0%, zirconium ferrosilicon
（FeSiZr）4.0%, remaining steel scrap（Fe）4.0%.According to the above proportioning, raw material are added in electric furnace, molten by following smelting technology
System.
The same previous process steps of melting technology.
Example IV（It prepares）：
Alterant chemical composition（By weight）：Rare earth (RE) .3.0%, silicon (Si）15.0%, chromium (Cr) 18.0%, zirconium (Zr)
3.8%, manganese (Mn) 13.8%, calcium（Ca）0.2%, surplus is iron (Fe) or inevitable impurity.
The alterant of mentioned component is melted, using following raw materials and proportioning:Rare earth ferrosilicon（FeSiRE）20%, silico-calcium closes
Gold（FeSiCa）1.5%, ferrosilicon (FeSi) 3.0%, ferrochrome (FeCr) 33.0%, ferromanganese（FeMn）23.5%, zirconium ferrosilicon（FeSiZr）
14.5%, remaining steel scrap（Fe）5.5%.According to the above proportioning, raw material are added in electric furnace, are melted by following smelting technology.
The same previous process steps of melting technology.
Embodiment five（Using）：
Weigh 50 Kg of the pig iron, 50 Kg of foundry returns, 150 Kg of steel scrap, 4.4 Kg of carburant, 75 ferrosilicon, 3 Kg, 65 ferromanganese, 1 Kg,
0.5 Kg of ferrochrome, 1.25 Kg of copper, 0.112 Kg of tin, 0.4 Kg of sulphur iron, the melting in intermediate frequency furnace wait for that temperature reaches 1520
DEG C when, molten iron is poured into casting ladle（0.4% alterant of the present invention and 0.4% inovulant are added in packet）, pouring temperature control
At 1400-1450 DEG C.
Comparative example one（Using）：
Weigh 50 Kg of the pig iron, 50 Kg of foundry returns, 150 Kg of steel scrap, 4.4 Kg of carburant, 75 ferrosilicon, 3 Kg, 65 ferromanganese, 1 Kg,
0.5 Kg of ferrochrome, 1.25 Kg of copper, 0.112 Kg of tin, 0.4 Kg of sulphur iron, the melting in intermediate frequency furnace wait for that temperature reaches 1520
DEG C when, molten iron is poured into casting ladle（0.4% existing alterant and 0.4% inovulant are added in packet）, pouring temperature, which controls, to exist
1400-1450℃。
Comparative example two（Using）：
Weigh 50 Kg of the pig iron, 50 Kg of foundry returns, 150 Kg of steel scrap, 4.4 Kg of carburant, 75 ferrosilicon, 3 Kg, 65 ferromanganese, 1 Kg,
0.5 Kg of ferrochrome, 1.25 Kg of copper, 0.112 Kg of tin, 0.4 Kg of sulphur iron, the melting in intermediate frequency furnace wait for that temperature reaches 1520
DEG C when, molten iron is poured into casting ladle（0.4% inovulant is added in packet）, pouring temperature control is at 1400-1450 DEG C.
Comparative example three（Using）：
Weigh 50 Kg of the pig iron, 50 Kg of foundry returns, 150 Kg of steel scrap, 4.4 Kg of carburant, 75 ferrosilicon, 3 Kg, 65 ferromanganese, 1 Kg,
0.8 Kg of ferrochrome, 1 Kg of molybdenum-iron, 1.25 Kg of copper, 0.112 Kg of tin, 0.4 Kg of sulphur iron, the melting in intermediate frequency furnace wait for temperature
When reaching 1520 DEG C, molten iron is poured into casting ladle（0.4% inovulant is added in packet）, pouring temperature control is in 1400-1450
℃。
Tensile strength and shrinkage depression high measure result：
Casting（Wall thickness is 50mm）After cleaning, sandblasting, using the shrinkage depression height of vernier caliper measurement casting, and it is processed into as required
The tensile sample for meeting GB/T 9439-2010 carries out tensile strength in WAW-Y500 microcomputer controlled electro-hydraulic servo universal testing machines
Test, intensity is high and shrinkage depression height is smaller, it was demonstrated that the alterant and its melting method of thin-wall high intensity gray cast iron are relatively good.
Remarks：Shrinkage depression height can be as a reference frame of casting shrinkage；GB/T9469-2009 ontologies are minimum
Intensity（20-40mm）HT275：220MPa, HT300：240MPa.
By embodiment it is found that the present invention both meets high intensity by a kind of alterant that new alterant melting method obtains
The requirement of strength of gray cast iron, and shrinkage is greatly reduced, while can substitute or reduce again the addition of molybdenum, evanohm.
Several embodiments selected by the present invention, it is suitable to be presently considered to be comparison, but should be noted that the above institute
The embodiment stated is only applicable to technical scheme of the present invention and non-limiting, and the present invention may include that all belong to this design and this hair
The all changes of embodiment in bright range and improvement.All made form modifications within the thinking enlightenment of the present invention, etc.
With replacement etc., should be included within the scope of the present invention.
Claims (2)
1. a kind of alterant for thin-wall high intensity gray cast iron, it is characterised in that：The alterant ingredient and weight ratio content
For：Rare earth 3.0-8.0%, silicon 15.0-30.0%, chromium 10.0-18.0%, zirconium 1.0-4.0%, manganese 7.0-14.0%, calcium 0.2-1.5%,
Surplus is iron and inevitable trace element 24.5-63.8%.
2. the alterant according to claim 1 for thin-wall high intensity gray cast iron, melting method is as follows：
1）, check before melting：
A. it is whether normal that 500Kg medium-frequency induction furnaces are first checked for, can be fed after confirming normally；
B. it needs to clean out on the barrier around electric furnace before blow-on power transmission；
2）, feed before blow-on power transmission；
Furnace bottom first spreads one layer of low-carbon waste steel in proportion, is then proportionally added into ferrochrome, ferromanganese, ferrosilicon successively；
3）, fusing and charging process：
A. after electric furnace power transmission, furnace charge melting situation in stove should be observed at any time；
B. it finds that when material position declines furnace charge should be added in time；
When c. finding that material position does not decline for a long time, should have a power failure observation, and disclosed with drill rod smash furnace charge in time, until the furnace charge that will be put up a shed
It smashes and falls or tilt furnace body fusing, ensure that furnace charge is continuous up and down；
When d. finding to there is the upper solid-state furnace charge surface of liquid alloy liquid floating to form crust, should the processing of power failure immediately, crust is smashed up,
So that furnace charge is transparent in stove；
When e. there are a large amount of liquid furnace charges, it is successively proportionally added into zirconium ferrosilicon, calcium-silicon and rare earth ferrosilicon successively；
F. after waiting for that all furnace charges are added, then when having found that flare is emerged, using the method adjustment furnace charge position manually stirred,
Or fire door is closed with furnace access cap, and suitably reduce power transmission power；When fusing finishes observation, electric furnace power transmission is given in stopping, being existed with drill rod
Stirring in stove；
4）, cast of coming out of the stove：
After waiting for that furnace charge all melts in electric furnace, then power transmission can come out of the stove for 4--5 minutes；
Before coming out of the stove, cooling bath is cleared up, smear alcohol paint or equably spreads last layer powder siccative in cooling bath inner surface；Igniting
Drying；
Pouring temperature of coming out of the stove is controlled at 1300 DEG C -1350 DEG C, has not only prevented the excessive scaling loss of alloy, but also high-melting-point alloy is avoided not to be melt
Change；
5）, it is broken：
Alterant is collected after coming out of the stove 12 hours, after collection first with hammer by alloy breaks down at no more than 100mm bulk, then be crushed
Machine is broken into suitable lumpiness；
6）, examine, mark and preserve：
Inspection should be sampled in time after alterant is broken；It is stored in dry polybag interior sealing after meeting aforementioned vermiculizer ingredient,
And make upper suitable mark；Underproof melted alloy is continuing with as foundry returns.
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| CN110029266A (en) * | 2019-03-20 | 2019-07-19 | 江苏亚峰合金材料有限公司 | A kind of cast iron silicon-zirconium-manganese-chromium inovulant and preparation method thereof |
| CN111705257A (en) * | 2020-06-18 | 2020-09-25 | 江苏亚峰合金材料有限公司 | Silicon-zinc-rare earth element-chromium inoculant for cast iron and preparation method thereof |
| CN111893236A (en) * | 2020-09-15 | 2020-11-06 | 禹州市恒利来新材料有限公司 | Vanadium-titanium inoculant for high-strength gray iron and preparation method thereof |
| CN116287820A (en) * | 2023-04-13 | 2023-06-23 | 江苏亚峰合金材料有限公司 | Inoculant for improving tensile strength of iron casting and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109811249A (en) * | 2019-03-01 | 2019-05-28 | 广西玉柴机器股份有限公司 | A kind of 300Mpa gray cast iron material and its production method and the cylinder of diesel engine prepared using the material |
| CN110029266A (en) * | 2019-03-20 | 2019-07-19 | 江苏亚峰合金材料有限公司 | A kind of cast iron silicon-zirconium-manganese-chromium inovulant and preparation method thereof |
| CN111705257A (en) * | 2020-06-18 | 2020-09-25 | 江苏亚峰合金材料有限公司 | Silicon-zinc-rare earth element-chromium inoculant for cast iron and preparation method thereof |
| CN111893236A (en) * | 2020-09-15 | 2020-11-06 | 禹州市恒利来新材料有限公司 | Vanadium-titanium inoculant for high-strength gray iron and preparation method thereof |
| CN111893236B (en) * | 2020-09-15 | 2022-04-15 | 禹州市恒利来新材料有限公司 | Vanadium-titanium inoculant for high-strength gray iron and preparation method thereof |
| CN116287820A (en) * | 2023-04-13 | 2023-06-23 | 江苏亚峰合金材料有限公司 | Inoculant for improving tensile strength of iron casting and preparation method thereof |
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