CN102560224A - Composite inoculant - Google Patents
Composite inoculant Download PDFInfo
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- CN102560224A CN102560224A CN2010105759602A CN201010575960A CN102560224A CN 102560224 A CN102560224 A CN 102560224A CN 2010105759602 A CN2010105759602 A CN 2010105759602A CN 201010575960 A CN201010575960 A CN 201010575960A CN 102560224 A CN102560224 A CN 102560224A
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a composite inoculant, which contains the following ingredients of: by weight, 20-30% of carbon, 40-50% of silicon, 6-9% of rare earth, 0.6-0.8% of strontium, 2.2-2.8% of barium, 0.1-0.2% of calcium, 0.1-0.2% of aluminium, and the balance being iron. In addition, 0.06-0.08 wt% of tin is added in the composite inoculant. The composite inoculant provided by the invention can effectively prolong graphitization depression time, substantially increase casting hardness and eliminate white castings, is especially in favor of improving the morphology and distribution of graphite in thin-walled castings, lowers the difference between crystal structures of positions with different thicknesses, reduces shrinkage tendency of castings, improves compactness of castings, raises cold-hot fatigue resistance and mechanical fatigue of castings, minimizes segregation of phosphor in cast iron, and makes phosphor become fine and uniformly-distributed binary iron phosphide eutectic in cast iron.
Description
Technical field
The present invention relates to field of metallurgy, relate in particular to a kind of composite inoculant.
Background technology
Existing nucleating agent kind mainly is divided into: 1, greying class; 2, hybridization class; 3, the stabilization class is three types.General nucleating agent mainly is meant the greying nucleating agent; Mixing nucleating agent is the various mechanical mixturies that breed material; The stabilization class still has stable perlite except the greying function is arranged.Silicon is the greying class, generally contains 60-80% silicon, and the most widely used is FeSi75, except as the body silicon, also can be compounded with other elements, like Ba, Ca, Mn, Zr, Sr, Ti, Mg, Al, C, B, Sn etc. to play various specific functions.
In the prior art, be " Preparation of Castiron is handled and substituted bismuth alloy " of 88101363.3 application for a patent for invention prospectus report like number of patent application, this nucleating agent contains bismuth 4-14%; Copper 0.1-1%; Tin 0.1-1%; Antimony 0.5-2%; Tellurium 0.1-1%.Above-mentioned nucleating agent uses and spoken parts in traditional operas base iron casting production, and the toughness and the tensile strength of product are lower.
Simultaneously; Phosphoric is an element that is difficult to removal in the foundry production of gray iron, magnesium iron; Under the ordinary production situation; Can produce iron phosphide eutectic and mixture thereof, the content of some phosphoric all seldom is used for the production of cast iron for the pig iron greater than 0.15 the phosphorus content that exceeds standard, and for some phosphorous higher iron ores.Increase cost for dephosphorization must take corresponding technological measure and perhaps abandon, caused a large amount of wastings of resources.
Summary of the invention
In order to overcome above defective, the technical problem that the present invention will solve is: propose a kind ofly can improve mechanical property, to reduce and to eliminate cast iron spoken parts in traditional operas and casting section susceptibility, the composite inoculant that economizes on resources.
The technical scheme that the present invention adopted is: a kind of composite inoculant, and the composition weight proportioning of this nucleating agent is: carbon 20-30%; Silicon 40-50%; Rare earth 6-9%; Strontium 0.6-0.8%; Barium 2.2-2.8%; Calcium 0.1-0.2%; Aluminium 0.1-0.2%; Surplus is an iron.
According to another preferred embodiment, a kind of composite inoculant is included in further that to add weight percent in the composite inoculant be the tin of 0.06-0.08.
According to another preferred embodiment, a kind of composite inoculant comprises that further said rare earth is a Baotou rare earth.
According to another preferred embodiment, a kind of composite inoculant comprises that further the granularity of said composite inoculant is 3-8mm.
The invention has the beneficial effects as follows:
1, prolongs the greying fall time effectively;
2, can increase the hardness of foundry goods significantly, eliminate the foundry goods spoken parts in traditional operas, be particularly conducive to form and the distribution situation of improving graphite in the thin-section casting, the crystalline phase tissue differences at different thickness place is diminished;
3, reduce foundry goods shrinkage porosite tendency, improve foundry goods compactness;
4, improve the cold-and-heat resistent fatigue of foundry goods and the performance of anti-mechanical fatigue;
5, reduce phosphorus segregation in cast iron, make phosphorus in cast iron, form binary iron phosphide eutectic tiny, that be evenly distributed.
Embodiment
Combine accompanying drawing and preferred embodiment that the present invention is done further detailed explanation now.These accompanying drawings are the synoptic diagram of simplification, substruction of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
A kind of composite inoculant, the composition weight proportioning of this nucleating agent is: carbon 20-30%; Silicon 40-50%; Rare earth 6-9%; Strontium 0.6-0.8%; Barium 2.2-2.8%; Calcium 0.1-0.2%; Aluminium 0.1-0.2%; Surplus is an iron, and preparation method of the present invention adopts remelting process: after the various elements of aforementioned proportion preparation are mixed, and remelting crystallization and pour into piece in electric furnace, it is granular to be broken into 3-8mm.
Rare earth described in the present invention is the lanthanon in the chemistry cycle: lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium; And with closely-related two elements of 15 elements of group of the lanthanides: scandium, yttrium; The mixture of totally 17 kinds of elements; Be called REE, be called for short rare earth.
Because phosphorus is the element of an easy segregation in cast iron; Phosphorously in the cast iron surpass at 0.5% o'clock; Have and to form iron phosphide eutectic; Iron phosphide eutectic often is distributed in the position between former eutectic cell with discontinuous form netted or the isolated island shape, and iron phosphide eutectic mainly exists with two kinds of forms: binary iron phosphide eutectic and ternary iron phosphide eutectic.For most of cast irons, iron phosphide eutectic can increase the fragility of cast iron, and the ternary iron phosphide eutectic hardness of particularly thick discontinuous netted or isolated island shape is higher.So when Cast Iron Production, all can the content of phosphoric be limited.For cast iron, as long as can avoid producing ternary iron phosphide eutectic thick, skewness, an amount of phosphorus content can increase the wear resistance of cast iron.Through researching and analysing discovery, rare earth not only can reduce the segregation of phosphorus, can also organize metamorphism to iron phosphide eutectic; Refinement iron phosphide eutectic tissue; Improve the form and the distribution of iron phosphide eutectic, can also purify oxygen in the ferrous solution, sulphur detrimental impurity, improve the over-all properties of cast iron.
Silicon, strontium are graphited element among the present invention, and strontium is at the also strong silicon of crossing of graphitizability, and two elements can promote greying strongly, reduce eutectic graphite and produce, because rare earth can stop the generation of special-shaped graphite to the metamorphism of graphite, obtain A type graphite.
Barium, tin are the strong perlite forming element that promotes among the present invention, can increase either pearlite occurred, and refine pearlite improves cast iron intensity, and rare earth can reduce or eliminate the segregation of tin.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification sheets, must confirm its technical scope according to the claim scope.
Claims (4)
1. composite inoculant, it is characterized in that: the composition weight proportioning of this nucleating agent is: carbon 20-30%; Silicon 40-50%; Rare earth 6-9%; Strontium 0.6-0.8%; Barium 2.2-2.8%; Calcium 0.1-0.2%; Aluminium 0.1-0.2%; Surplus is an iron.
2. a kind of composite inoculant according to claim 1 is characterized in that: in composite inoculant, adding weight percent is the tin of 0.06-0.08.
3. a kind of composite inoculant according to claim 1 is characterized in that: said rare earth is a Baotou rare earth.
4. a kind of composite inoculant according to claim 1 is characterized in that: the granularity of said composite inoculant is 3-8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105759602A CN102560224A (en) | 2010-12-07 | 2010-12-07 | Composite inoculant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105759602A CN102560224A (en) | 2010-12-07 | 2010-12-07 | Composite inoculant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102560224A true CN102560224A (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010105759602A Pending CN102560224A (en) | 2010-12-07 | 2010-12-07 | Composite inoculant |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808127A (en) * | 2012-09-05 | 2012-12-05 | 石家庄金刚凯源动力科技有限公司 | Special inoculant for centrifugally casting thin-wall dry cylinder liner |
| CN103725948A (en) * | 2013-12-26 | 2014-04-16 | 沪东重机有限公司 | Inoculator for large-diameter cylinder jacket |
| CN109777907A (en) * | 2017-11-14 | 2019-05-21 | 济南圣泉集团股份有限公司 | Iron casting inoculant, preparation method and application method comprising graphene |
| CN110273041A (en) * | 2018-03-13 | 2019-09-24 | 溧阳市联华机械制造有限公司 | A kind of cast iron pretreating agent |
| CN111518979A (en) * | 2020-06-18 | 2020-08-11 | 江苏亚峰合金材料有限公司 | Zinc-containing inoculant for nodular cast iron |
| CN111570734A (en) * | 2020-06-18 | 2020-08-25 | 江苏亚峰合金材料有限公司 | Silicon-carbon-calcium inoculant 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 |
-
2010
- 2010-12-07 CN CN2010105759602A patent/CN102560224A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808127A (en) * | 2012-09-05 | 2012-12-05 | 石家庄金刚凯源动力科技有限公司 | Special inoculant for centrifugally casting thin-wall dry cylinder liner |
| CN102808127B (en) * | 2012-09-05 | 2014-07-02 | 石家庄金刚凯源动力科技有限公司 | Special inoculant for centrifugally casting thin-wall dry cylinder liner |
| CN103725948A (en) * | 2013-12-26 | 2014-04-16 | 沪东重机有限公司 | Inoculator for large-diameter cylinder jacket |
| CN109777907A (en) * | 2017-11-14 | 2019-05-21 | 济南圣泉集团股份有限公司 | Iron casting inoculant, preparation method and application method comprising graphene |
| CN110273041A (en) * | 2018-03-13 | 2019-09-24 | 溧阳市联华机械制造有限公司 | A kind of cast iron pretreating agent |
| CN111518979A (en) * | 2020-06-18 | 2020-08-11 | 江苏亚峰合金材料有限公司 | Zinc-containing inoculant for nodular cast iron |
| CN111570734A (en) * | 2020-06-18 | 2020-08-25 | 江苏亚峰合金材料有限公司 | Silicon-carbon-calcium inoculant 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 |
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Application publication date: 20120711 |