CN101608280B - Compound inoculant used for producing D-type graphite cast iron and preparation method thereof - Google Patents
Compound inoculant used for producing D-type graphite cast iron and preparation method thereof Download PDFInfo
- Publication number
- CN101608280B CN101608280B CN2009100748948A CN200910074894A CN101608280B CN 101608280 B CN101608280 B CN 101608280B CN 2009100748948 A CN2009100748948 A CN 2009100748948A CN 200910074894 A CN200910074894 A CN 200910074894A CN 101608280 B CN101608280 B CN 101608280B
- Authority
- CN
- China
- Prior art keywords
- iron
- surplus
- silicon
- weight percentage
- ingot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a compound inoculant used for producing D-type graphite cast iron, which is characterized in that the weight percents of the constituents are as follows: magnesium 1.0-4.0, rare earth 4.0-8.0, titanium 4.0-9.0, aluminum 1.5-3.0, stibium 0.5-2.0, calcium 2.0-5.0, barium 1.0-4.0, silicon 35-50 and the balance of iron. When the compound inoculant is employed to carry out inoculation on the melted iron with high carbon equivalent, the obtained graphite in the cast iron is the D-type graphite. The mechanical properties of castings are high, the tensile strength reaches over 250MPa and the compactness is good. The melted iron has high carbon equivalent, thus greatly improving the casting properties of alloys, reducing the residual stress of the castings, contributing to good size stability and enhancing the machinability of the castings. The multiple compound inoculant adopts ladle bottom pouring process, namely, the compound inoculant is placed on the bottom of a ladle, then the melted iron is injected and the compound inoculant is continuously melted and absorbed in the process of melted iron injection, thereby reaching the satisfactory inoculation effect, therefore, the method is simple and the use is convenient.
Description
Technical field
The present invention relates to the nucleating agent that a kind of cast iron is used, especially a kind of composite inoculant of producing the D type Graphite Iron Cast and preparation method thereof that is used to.
Background technology
Carbon in the common grey iron generally exists with the flake graphite form.Flake graphite is divided into types such as A, B, C, D, E, F according to its form difference.Traditional viewpoint thinks that A type graphite is evenly distributed, and is non-directional, less to the effect of isolating of matrix, makes cast iron have higher intensity; D type graphite is point-like or the strip graphite that is non-directional distribution between austenite dendrites, is a kind of harmful tissue, can reduce the intensity of cast iron.But studies show that in a large number in recent years, the D type Graphite Iron Cast is higher, finer and close than the intensity of A type graphite cast iron, dimensional stability better, more the surface quality of heat-resistant anti-fatigue, mechanical workout is higher.
D type graphite is that iron liquid crystallization under than the big supercooling degree condition of certain chemical ingredients obtains.The method of producing the D type Graphite Iron Cast at present mainly contains: the one, and by adopting the method production of metal mold or continuous casting.Be suitable for middle smallclothes or section bar simple in structure.The 2nd, adopt in iron liquid, to add a certain amount of method production that can realize composition supercooled alloying element.Be suitable for the production of most of foundry goods.But specifically which alloying element has super cooling effect to cast iron, and problems such as add-on, adding mode, and achievement in research is many, and what also have has developed master alloy as nucleating agent, and it is few to put the report that forms commodity at present on market.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of composite inoculant that is used to produce the D type Graphite Iron Cast.
For solving the problems of the technologies described above, the weight percentage of composition is among the present invention: magnesium 1.0～4.0%, rare earth 4.0～8.0%, titanium 4.0～9.0%, aluminium 1.5～3.0%, antimony 0.5～2.0%, calcium 2.0～5.0%, barium 1.0～4.0%, silicon 35～50% and balance iron.
The preferred composition weight percentage of the present invention is: magnesium 2.0%, rare earth 6.0%, titanium 7.0%, aluminium 2.0%, antimony 1.0%, calcium 3.0%, barium 3.0%, silicon 40%, surplus are iron.
The present invention preferably adopts the raw material preparing of following weight percent: pure magnesium ingot 1.25～5.0%, weight percentage is a rare earth 30%, silicon 55%, surplus is the rare earth ferrosilicon alloy 13.5～26.6% of iron, weight percentage is a titanium 30%, aluminium 5%, silicon 5%, surplus is the ferrotianium 13.5～30.0% of iron, fine aluminium ingot 0～2.3%, star antimony ingot 0.5～2.0%, weight percentage is a calcium 30%, silicon 55%, surplus is the silicocalcium 6.7～16.5% of iron, weight percentage is a barium 30%, silicon 55%, surplus is the Si-Ba alloy 3.5～13.5% of iron, weight percentage is a silicon 75%, the ferrosilicon 0～48% of Yu Weitie, surplus are steel scrap.
The present invention also provides the preparation method of the composite inoculant that is used to produce the D type Graphite Iron Cast, this method adopts following processing step: with the starting material pure magnesium ingot 1.25～5.0% of weight percentage, weight percentage is a rare earth 30%, silicon 55%, surplus is the rare earth ferrosilicon alloy 13.5～26.6% of iron, weight percentage is a titanium 30%, aluminium 5%, silicon 5%, surplus is the ferrotianium 13.5～30.0% of iron, fine aluminium ingot 0～2.3%, star antimony ingot 0.5～2.0%, weight percentage is a calcium 30%, silicon 55%, surplus is the silicocalcium 6.7～16.5% of iron, weight percentage is a barium 30%, silicon 55%, surplus is the Si-Ba alloy 3.5～13.5% of iron, weight percentage is a silicon 75%, the ferrosilicon 0～48% of Yu Weitie, surplus are steel scrap; Pack in the crucible of electric induction furnace by the order layering of the ferrosilicon of the ferrosilicon of steel scrap, 1/2 weight, pure magnesium ingot, fine aluminium ingot, star antimony ingot, rare earth ferrosilicon alloy, ferrotianium, silicocalcium, Si-Ba alloy, 1/2 weight, through fusing, stirring, casting, fragmentation, can originally be used to produce the composite inoculant of D type Graphite Iron Cast.
The function mechanism of each composition among the present invention is:
When primary crystallization, the key that obtains the D type Graphite Iron Cast is to form flourishing austenite dendrites to grow up with the thick sheet that effectively suppresses graphite.Magnesium (Mg), rare earth (RE) strongly inhibited graphite are separated out, and enlarge primary crystal austenite growth temperature zone, promote the austenitic growth of primary crystal.Sulfide, oxide compound that sulphur in magnesium, rare earth and the iron liquid, oxygen generate can make between primary crystal austenite skeleton that graphite crystal nucleus increases in the iron liquid as the external nucleus of graphite crystallization, and the D type graphite that obtains behind the eutectic is increased, and size reduces greatly.
Titanium (Ti) is strong carbide forming element, the velocity of diffusion of the very strong carbon that slowed down of avidity of it and carbon atom, thus postpone separating out of eutectic graphite, the eutectic transformation temperature is reduced.Titanium also is attracted to the growth that has suppressed graphite on every side of graphite, and titanium also has stronger deoxidizing capacity simultaneously, and after adding a certain amount of titanium in the iron liquid, oxygen level obviously reduces, and these all help the formation of D type graphite.
The fast efficient height of the deoxidation speed of aluminium (Al), aluminium become the Al of a large amount of indissolubles and disperse distribution with the oxidation symphysis in the iron liquid
2O
3Particle.Because Al
2O
3All belong to hexagonal lattice with graphite, and its lattice parameter is approaching, can becomes effective substrate of graphite crystallization, therefore help generating the D type graphite that small and dispersed distributes.
Antimony (Sb) belongs to strong carbide forming element, adds the antimony of trace in the iron liquid, can reduce the eutectic transformation temperature of iron liquid, promotes pearlitic formation strongly, and refine pearlite, and is highly beneficial to improving cast iron intensity.
Calcium (Ca) is a kind of strong graphite element, adds the chilling tendency that an amount of calcium can effectively reduce cast iron.Calcium can also significantly reduce the vapour pressure of magnesium simultaneously, makes alloy reaction steady, improves the specific absorption of magnesium.Barium (Ba) not only can reduce the vapour pressure of magnesium, improves processing condition and labor condition, can also make the action effect of calcium more abundant, long lasting bringing into play.The common especially strong greying of silicon (Si) promotes element, has good inoculation(effect), and also has the effect of " Gu magnesium " in nucleating agent.The content of silicon is greater than 35% in the polynary composite inoculant of the present invention, in melting and inoculation process, can effectively avoid the situation of the serious scaling loss of magnesium in the polynary composite inoculant, reduced the difficulty that nucleating agent is produced, it is very steady also to make iron liquid get the inoculation process.Simultaneously an amount of magnesium, aluminium, antimony etc. also can effectively reduce the fusing point of polynary composite inoculant, improve the dynamic conditions of inoculation, thereby quicken the diffusion and the absorption of polynary composite inoculant.
Adopt the beneficial effect that technique scheme produced to be: when producing the above high trade mark ironcasting of HT250, common way is to adopt lower carbon equivalent (less than 3.8%), to reduce the disadvantageous effect of graphite to matrix, strengthen and breed to prevent white structure, and the low result of carbon equivalent is that iron liquid flowability is poor, shrink greatly, the foundry goods internal stress is big etc.When utilizing composite inoculant of the present invention that carbon equivalent high (3.9～4.2%) iron liquid is carried out inoculation, the graphite in the resulting cast iron is D type graphite.Because the graphite in the cast iron is the D type, the mechanical property of foundry goods is higher, and tensile strength reaches more than the 250Mpa, and compactness is good.Owing to iron liquid carbon equivalent height, improved the castability of alloy greatly, reduced the unrelieved stress of foundry goods, dimensional stability is good, and has improved the machinability of foundry goods.Composite inoculant of the present invention adopts ladle bottom pouring process, is about to composite inoculant of the present invention and is placed at the bottom of the casting ladle bag, injects iron liquid then, the process composite inoculant that injects at iron liquid constantly is melted absorption, thereby reach satisfied pregnant effect, so method is simple, easy to use.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is to use the metallograph of the cast iron that the present invention obtains.
Embodiment
Originally the composite inoculant that is used to produce the D type Graphite Iron Cast is selected the starting material of following weight percent for use when producing: pure magnesium ingot 1.25～5.0%, rare earth ferrosilicon alloy (weight percentage Re 30%, Si 55%, surplus is Fe) 13.5～26.6%, ferrotianium (weight percentage Ti 30%, Al 5%, Si 5%, surplus is Fe) 13.5～30.0%, fine aluminium ingot (Al) 0～2.3%, star antimony ingot (Sb) 0.5～2.0%, silicocalcium (weight percentage Ca 30%, Si 55%, surplus is Fe) 6.7～16.5%, Si-Ba alloy (weight percentage Ba 30%, Si 55%, surplus is Fe) 3.5～13.5%, ferrosilicon (weight percentage Si 75%, surplus is Fe) 0～48%, surplus is steel scrap.Wherein, the content of pure magnesium ingot calculates and gets by recovery rate 80%.
Originally the preparation method who is used to produce the composite inoculant of D type Graphite Iron Cast is:
With above-mentioned starting material according to ratio requirement layering pack in the crucible of electric induction furnace, through fusing, stirring, casting, fragmentation, can obtain this composite inoculant.Wherein, the precedence of layering shove charge is: steel scrap, ferrosilicon, pure magnesium ingot, fine aluminium ingot, star antimony ingot, rare earth ferrosilicon alloy, ferrotianium, silicocalcium, Si-Ba alloy, ferrosilicon.Wherein ferrosilicon adds at twice, and the first time and secondary add-on respectively account for half.
This composite inoculant can adopt conventional using method, as ladle bottom pouring process etc.
Embodiment 1: with ready starting material, according to the method for layer-by-layer distribution raw material is packed in the crucible of induction furnace, the precedence of layering shove charge and raw-material weight percentage are: steel scrap 9.3%, ferrosilicon 11.2%, pure magnesium ingot 2.5%, fine aluminium ingot 0.8%, star antimony ingot 1.0%, rare earth ferrosilicon alloy 20%, ferrotianium 24%, silicocalcium 10%, Si-Ba alloy 10%, ferrosilicon 11.2%.Starting material behind the dress hut are melted, stir tapping casting; After waiting to solidify cooling, the granularity that is broken into 3～8mm can obtain this composite inoculant.The purpose that is broken into above-mentioned granularity is to absorb for the ease of iron liquid.
The alloy content of the composite inoculant that present embodiment obtains is: magnesium (Mg) 2.0%, and rare earth (RE) 6.0%, titanium (Ti) 7.0%, aluminium (Al) 2.0%, antimony (Sb) 1.0%, calcium (Ca) 3.0%, barium (Ba) 3.0%, silicon (Si) 40%, surplus is iron (Fe).
Embodiment 2: the difference of present embodiment and embodiment 1 is: raw-material batch is when producing this composite inoculant: steel scrap 3.93%, ferrosilicon 15.8%, pure magnesium ingot 1.25%, fine aluminium ingot 2.32%, star antimony ingot 0.5%, rare earth ferrosilicon alloy 26.7%, ferrotianium 13.5%, silicocalcium 16.7%, Si-Ba alloy 3.5%, ferrosilicon 15.8%.The alloy content of the composite inoculant that obtains is: magnesium (Mg) 1.0%, and rare earth (RE) 8.0%, titanium (Ti) 4.0%, aluminium (Al) 3.0%, antimony (Sb) 0.5%, calcium (Ca) 5.0%, barium (Ba) 1.0%, silicon (Si) 50%, surplus is iron (Fe).
Embodiment 3: the difference of present embodiment and embodiment 1 is: raw-material batch is when producing this composite inoculant: steel scrap 9.3%, ferrosilicon 10.0%, pure magnesium ingot 5.0%, fine aluminium ingot 0.0%, star antimony ingot 2.0%, rare earth ferrosilicon alloy 13.5%, ferrotianium 30.0%, silicocalcium 6.7%, Si-Ba alloy 13.5%, ferrosilicon 10.0%.The alloy content of the composite inoculant that present embodiment obtains is: magnesium (Mg) 4.0%, and rare earth (RE) 4.0%, titanium (Ti) 9.0%, aluminium (Al) 1.5%, antimony (Sb) 2.0%, calcium (Ca) 2.0%, barium (Ba) 4.0%, silicon (Si) 35%, surplus is iron (Fe).
Use embodiment: this composite inoculant under cupola furnace-electric furnace double melting condition, the service condition of production Cummins Diesel Engine cylinder body:
Cummins Diesel Engine cylinder body material is the cast iron of trade mark HT250, requires high compactness, high thermal fatigue, low-stress and good processing characteristics, any surface finish, size accurate etc.For ensuring the quality of products, general way is when strictness control carbon equivalent is about 3.8%, also will add alloying elements such as a certain amount of copper, molybdenum, and strengthens and breed with stress relief annealing etc., and production cost is higher.
This use embodiment adopts higher carbon equivalent (3.9～4.2%), and concrete chemical ingredients is: C 3.4%, and Si 2.3%, and Mn 0.8%, and P 0.03%, and S 0.03%.Iron liquid tapping temperature is 1480 ℃, adopts the ladle bottom pouring process inoculation process.The add-on of this composite inoculant is 0.5%.After treating that casting ladle is by iron liquid, be that the 75 ferrosilicon grains of 1～3mm are sprinkling upon and float silicon on the iron liquid surface and breed with 0.3% granularity again.This composite inoculant adopts composition proportion among the embodiment 1.
The Cummins Diesel Engine cylinder block casting of producing, the graphite in metallographicobservation cast iron is the D type, sees Fig. 1.Reached the foundry goods technical requirements fully through Performance Detection.Compare casting cost with former technology and obviously reduce, economic benefit is very remarkable.
Claims (4)
1. a composite inoculant that is used to produce the D type Graphite Iron Cast is characterized in that the weight percentage of its composition is: magnesium 1.0～4.0%, rare earth 4.0～8.0%, titanium 4.0～9.0%, aluminium 1.5～3.0%, antimony 0.5～2.0%, calcium 2.0～5.0%, barium 1.0～4.0%, silicon 35～50% and balance iron.
2. the composite inoculant that is used to produce the D type Graphite Iron Cast according to claim 1, the weight percentage that it is characterized in that described composition is: magnesium 2.0%, rare earth 6.0%, titanium 7.0%, aluminium 2.0%, antimony 1.0%, calcium 3.0%, barium 3.0%, silicon 40%, surplus are iron.
3. the composite inoculant that is used to produce the D type Graphite Iron Cast according to claim 1, it is characterized in that the raw material preparing that it adopts following weight percent: pure magnesium ingot 1.25～5.0%, weight percentage is a rare earth 30%, silicon 55%, surplus is the rare earth ferrosilicon alloy 13.5～26.6% of iron, weight percentage is a titanium 30%, aluminium 5%, silicon 5%, surplus is the ferrotianium 13.5～30.0% of iron, fine aluminium ingot 0～2.3%, star antimony ingot 0.5～2.0%, weight percentage is a calcium 30%, silicon 55%, surplus is the silicocalcium 6.7～16.5% of iron, weight percentage is a barium 30%, silicon 55%, surplus is the Si-Ba alloy 3.5～13.5% of iron, weight percentage is a silicon 75%, surplus is the ferrosilicon 0～48% of iron, and surplus is a steel scrap.
4. claim 1,2 or the 3 described preparation methods that are used to produce the composite inoculant of D type Graphite Iron Cast, it is characterized in that this method adopts following processing step: with the starting material pure magnesium ingot 1.25～5.0% of weight percentage, weight percentage is a rare earth 30%, silicon 55%, surplus is the rare earth ferrosilicon alloy 13.5～26.6% of iron, weight percentage is a titanium 30%, aluminium 5%, silicon 5%, surplus is the ferrotianium 13.5～30.0% of iron, fine aluminium ingot 0～2.3%, star antimony ingot 0.5～2.0%, weight percentage is a calcium 30%, silicon 55%, surplus is the silicocalcium 6.7～16.5% of iron, weight percentage is a barium 30%, silicon 55%, surplus is the Si-Ba alloy 3.5～13.5% of iron, weight percentage is a silicon 75%, surplus is the ferrosilicon 0～48% of iron, and surplus is a steel scrap; Pack in the crucible of electric induction furnace by the order layering of the ferrosilicon of the ferrosilicon of steel scrap, 1/2 weight, pure magnesium ingot, fine aluminium ingot, star antimony ingot, rare earth ferrosilicon alloy, ferrotianium, silicocalcium, Si-Ba alloy, 1/2 weight, through fusing, stirring, casting, fragmentation, can obtain being used to produce the composite inoculant of D type Graphite Iron Cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100748948A CN101608280B (en) | 2009-07-17 | 2009-07-17 | Compound inoculant used for producing D-type graphite cast iron and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100748948A CN101608280B (en) | 2009-07-17 | 2009-07-17 | Compound inoculant used for producing D-type graphite cast iron and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101608280A CN101608280A (en) | 2009-12-23 |
| CN101608280B true CN101608280B (en) | 2011-01-05 |
Family
ID=41482189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100748948A Expired - Fee Related CN101608280B (en) | 2009-07-17 | 2009-07-17 | Compound inoculant used for producing D-type graphite cast iron and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101608280B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2976172A1 (en) * | 2013-03-19 | 2016-01-27 | Ferropem | Inoculant with surface particles |
| CN109913745A (en) * | 2019-02-20 | 2019-06-21 | 河北恒工机械装备科技有限公司 | Nickel alloy D type graphite austenite inoxidizability cast iron profile material and its manufacturing method |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956039B (en) * | 2010-10-12 | 2012-02-08 | 禹州市恒利来合金厂 | Pipe die powder for centrifugally casting nodular cast iron pipe and preparation process thereof |
| CN103725948A (en) * | 2013-12-26 | 2014-04-16 | 沪东重机有限公司 | Inoculator for large-diameter cylinder jacket |
| CN105039629A (en) * | 2015-05-23 | 2015-11-11 | 濮阳市中壹电子科技有限公司 | Inoculant for increasing strength of gray cast iron, preparation method and use method thereof |
| CN105624544A (en) * | 2016-02-26 | 2016-06-01 | 铜陵安东铸钢有限责任公司 | Compound rare earth nucleating agent for nodular cast iron and preparation method of compound rare earth nucleating agent |
| CN107400750A (en) * | 2017-08-31 | 2017-11-28 | 安徽信息工程学院 | High trade mark magnesium iron inovulant and preparation method thereof |
| NO20172065A1 (en) | 2017-12-29 | 2019-07-01 | Elkem Materials | Cast iron inoculant and method for production of cast iron inoculant |
| CN109880958A (en) * | 2019-02-26 | 2019-06-14 | 江苏亚峰合金材料有限公司 | Marine diesel oil generator cylinder body special inoculant |
| CN110125341A (en) * | 2019-06-10 | 2019-08-16 | 安徽裕隆模具铸业有限公司 | A kind of random inoculant and its application method |
| CN111363876A (en) * | 2020-04-28 | 2020-07-03 | 共享装备股份有限公司 | Inoculation line formula for gray cast iron line feeding inoculation and production process |
| CN113118390B (en) * | 2021-05-25 | 2023-05-09 | 江苏力源金河铸造有限公司 | Pouring process for large hydraulic castings |
| CN114653902B (en) * | 2022-04-19 | 2024-03-22 | 江苏亚峰合金材料有限公司 | Environment-friendly casting inoculant containing rare earth elements |
| CN116356098B (en) * | 2023-04-23 | 2024-08-27 | 江苏亚峰合金材料有限公司 | Vanadium-manganese-chromium inoculant for environment-friendly high-strength gray cast iron |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU594205A1 (en) * | 1976-08-09 | 1978-02-25 | Центральный Научно-Исследовательский Институт Технологии Машиностроения | Complex inoculant |
| US5008074A (en) * | 1990-04-26 | 1991-04-16 | American Alloys, Inc. | Inoculant for gray cast iron |
| CN1077229A (en) * | 1992-04-06 | 1993-10-13 | 德州机床厂 | Cast-iron compound inoculant |
| CN101078083A (en) * | 2007-06-29 | 2007-11-28 | 河北科技大学 | Special-purpose multi-component low rare earth vermiculizer for producing thick wall Vermicular iron element by furnace cupola |
-
2009
- 2009-07-17 CN CN2009100748948A patent/CN101608280B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU594205A1 (en) * | 1976-08-09 | 1978-02-25 | Центральный Научно-Исследовательский Институт Технологии Машиностроения | Complex inoculant |
| US5008074A (en) * | 1990-04-26 | 1991-04-16 | American Alloys, Inc. | Inoculant for gray cast iron |
| CN1077229A (en) * | 1992-04-06 | 1993-10-13 | 德州机床厂 | Cast-iron compound inoculant |
| CN101078083A (en) * | 2007-06-29 | 2007-11-28 | 河北科技大学 | Special-purpose multi-component low rare earth vermiculizer for producing thick wall Vermicular iron element by furnace cupola |
Non-Patent Citations (1)
| Title |
|---|
| 姚俊邦.Sb微合金化对灰铸铁组织和性能的影响.《灰铸铁及球墨铸铁》.2008,(第6期),第43页右栏第9-16行. * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2976172A1 (en) * | 2013-03-19 | 2016-01-27 | Ferropem | Inoculant with surface particles |
| EP2976172B1 (en) * | 2013-03-19 | 2022-04-27 | Ferropem | Inoculant with surface particles |
| CN109913745A (en) * | 2019-02-20 | 2019-06-21 | 河北恒工机械装备科技有限公司 | Nickel alloy D type graphite austenite inoxidizability cast iron profile material and its manufacturing method |
| CN109913745B (en) * | 2019-02-20 | 2021-04-30 | 河北恒工精密装备股份有限公司 | Nickel alloyed D-type graphite austenite oxidation resistant cast iron section and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101608280A (en) | 2009-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101608280B (en) | Compound inoculant used for producing D-type graphite cast iron and preparation method thereof | |
| CN103981434B (en) | A kind of preparation method of high tough spheroidal graphite cast iron | |
| CN102851575B (en) | Oxidation-resistant alloying grey cast iron and preparation method thereof | |
| CN102965567B (en) | Casting thick large-section pearlite nodular cast iron and casting method thereof | |
| CN102071351B (en) | Vermicularizing treatment process of vanadium-titanium vermicular graphite cast iron | |
| CN101660097A (en) | Wear-resisting alloy steel with high boron, high chrome and low carbon and preparation method thereof | |
| CN105401066A (en) | Low-tin-silicon-molybdenum vermicular graphite cast iron and preparation method thereof | |
| CN112962018B (en) | Chilling process manufacturing method of non-label QT600-7 nodular cast iron | |
| CN105385935B (en) | A kind of high silicon molybdenum vermicular cast iron and its production method | |
| CN103146988B (en) | Highly thermal-fatigue resistant alloy and spheroidal graphite cast iron glass mold material and preparation method thereof | |
| CN108315633B (en) | Gray cast iron with high heat conductivity and high strength and preparation method thereof | |
| CN102071352A (en) | Vanadium-titanium vermicular cast iron brake drum and preparation method thereof | |
| CN102400032B (en) | Large-cross-section nodular cast iron | |
| CN103498108A (en) | High-boron high-chromium low-carbon wear-resisting alloy steel with good red hardness and manufacturing method thereof | |
| CN103602878A (en) | Preparation method of high-toughness nodular cast iron | |
| KR20180008612A (en) | How to melt cast iron | |
| CN105316563A (en) | Inoculants, preparation method thereof and application in smelting of nodular cast iron | |
| CN109402491A (en) | The control method of thick and large section solution strengthening ferrite ductile cast iron increase number of graphite ball | |
| CN110029266A (en) | A kind of cast iron silicon-zirconium-manganese-chromium inovulant and preparation method thereof | |
| CN109930058A (en) | - 40 DEG C of low-temperature high-strength high-ductility spheroidal graphite cast-iron and preparation method thereof and railway locomotive components | |
| CN110964974A (en) | As-cast high-strength high-elongation synthetic nodular cast iron and preparation method thereof | |
| WO2022148060A1 (en) | High-entropy cast iron and preparation method therefor | |
| CN114457280B (en) | Preparation method of high-strength and high-elongation clay sand as-cast QT700-10 ductile iron casting | |
| CN102115801B (en) | Method for producing high-quality spheroidal graphite cast iron and spheroidal graphite cast iron prepared thereby | |
| CN109536664B (en) | Vermicular graphite cast iron vortex plate and production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20140717 |
|
| EXPY | Termination of patent right or utility model |