CN103525969A - Nodular cast iron rare-earth magnesium silicon nodularizer - Google Patents
Nodular cast iron rare-earth magnesium silicon nodularizer Download PDFInfo
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- CN103525969A CN103525969A CN201210425830.XA CN201210425830A CN103525969A CN 103525969 A CN103525969 A CN 103525969A CN 201210425830 A CN201210425830 A CN 201210425830A CN 103525969 A CN103525969 A CN 103525969A
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Abstract
The invention relates to a nodular cast iron rare-earth magnesium silicon nodularizer, comprising the following components by weight percent: 12-15% of Mg, 0.5-2.0% of Re, 42-50% of Si, 3.5-5.5% of Ca, 0.5-1.0% of Ba, 2.0-5.0% of Mn, 0.5-1.5% of C, less than 1.5% of Al, and the balance of Fe. The components are prepared into granules by a conventional mix-melting method and crushing, so as to obtain the nodular cast iron rare-earth magnesium silicon nodularizer. The nodularizer is in an irregular block shape; the grain size is 3-25mm or 5-40mm. According to the nodular cast iron rare-earth magnesium silicon nodularizer, the content of magnesium is improved; the spheroidisation cost can be significantly reduced; meanwhile, the nodular cast iron rare-earth magnesium silicon nodularizer is stable in spheroidisation quality and good in graphite ball roundness; the effects such as purification of molten iron, facilitation of graphitization, delaying of degraded spheroidization and facilitation of nucleation refined organization and the like can be achieved by adding Re, Ca, Ba, Mn and C.
Description
Technical field
The present invention relates to spheroidal graphite cast iron technical field, relate in particular to a kind of ductile iron rare earth Mg-Si nodularizer.
Background technology
In the production process of spheroidal graphite cast iron, spheroidizing is a requisite link.In the existing production of China, spheroidizing generally adopts nodulizing agent to pour method and processes.In prior art, patent CN91108271.9 discloses a kind of Nodularizing additive for casting high toughness nodular graphite cast iron, patent CN91108270.0 discloses a kind of Nodularizing additive for casting high strength nodular graphite cast iron, above-mentioned 2 patents have all been done improvement to nodulizing agent formula, nodularization is effective, but addition is larger, spheroidizing cost is higher.
In addition, through applicant's retrieval, learn: patent CN00112456.0 discloses a kind of As-Cast High-Strength Ductile Iron cored line style nodulizing agent, patent CN00112455.2 discloses a kind of As-cast High-tenacity Nodular Cast Iron cored line style nodulizing agent, such scheme is all greatly to have improved Mg content on formula, reducing add-on, save spheroidizing cost and improve nodularization effect aspect and played remarkable effect, but because the application of cored line style nodulizing agent needs the change of spheriodization process thereof, the input that needs wire-feeding device comprising straightening wire-leading device, is therefore very restricted at the universal of China.
As everyone knows, magnesium is to promote the strongest element of spheroidization of graphite ability, if the magnesium content of nodulizing agent is high, can reduces add-on and improve nodularization effect.But because fusing point, the boiling point of magnesium are low, when nodulizing agent adds, a large amount of rapid gasifications of magnesium can aggravate molten iron boiling on the contrary, reduce the specific absorption of magnesium, cause nodularization process to be difficult to control, nodularization quality is unstable.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of specific absorption that improves magnesium, be applicable to pour method treatment process and the stable ductile iron rare earth Mg-Si nodularizer of spheroidizing.
Ductile iron rare earth Mg-Si nodularizer of the present invention, its component comprises the C that weight percent is the Mg of 12%-15%, Re that weight percent is 0.5%-2.0%, weight percent is 42%-50% Si, Ca that weight percent is 3.5%-5.5%, Ba that weight percent is 0.5%-1.0%, Mn that weight percent is 2.0%-5.0% and weight percent are 0.5%-1.5%, surplus is Fe, and the content of Al is less than 1.5%;
Above-mentioned element, according to conventional mix-melting method and through broken granulation shape, is obtained to ductile iron rare earth Mg-Si nodularizer.
Further, it is shaped as irregular bulk, granularity between 3-25mm or 5-40mm the ductile iron rare earth Mg-Si nodularizer obtaining.
Further, ductile iron rare earth Mg-Si nodularizer of the present invention, the weight percent of wherein said Mg is 12.5%-14.5%, and the weight percent of Re is 0.8%-1.8%, and the weight percent of Si is 44%-48%, the weight percent of Ca is 3.8%-5.3%, the weight percent of Ba is 0.6%-0.9%, and the weight percent of Mn is 2.5%-4.5%, and the weight percent of C is 0.8%-1.3%, the content of Al is less than 1.5%, and surplus is Fe.
Further, ductile iron rare earth Mg-Si nodularizer of the present invention, the weight percent of wherein said Mg is 13%-14%, and the weight percent of Re is 1%-1.5%, and the weight percent of Si is 46%-47%, the weight percent of Ca is 4%-5%, the weight percent of Ba is 0.7%-0.8%, and the weight percent of Mn is 3%-4%, and the weight percent of C is 0.9%-1.1%, the content of Al is less than 1.5%, and surplus is Fe.
Further, ductile iron rare earth Mg-Si nodularizer of the present invention, the weight percent of wherein said Mg is that the weight percent that the weight percent of 12%, Re is 2%, Si is 45%, the weight percent of Ca is 3.5%, the weight percent of Ba is that the weight percent that the weight percent of 1.0%, Mn is 3%, C is 0.5%, the content of Al is less than 1.5%, and surplus is Fe.
Compared with prior art, beneficial effect of the present invention is: ductile iron rare earth Mg-Si nodularizer of the present invention, its component comprises the C that weight percent is the Mg of 12%-15%, Re that weight percent is 0.5%-2.0%, weight percent is 42%-50% Si, Ca that weight percent is 3.5%-5.5%, Ba that weight percent is 0.5%-1.0%, Mn that weight percent is 2.0%-5.0% and weight percent are 0.5%-1.5%, and surplus is Fe; In above-mentioned element, magnesium is the principal element that impels spheroidization of graphite, has very strong desulfurization deoxidation ability, improves the content of magnesium in nodulizing agent, can make nodularization better effects if, and the roundness of globular graphite is better, also can reduce nodulizing agent add-on, reduces processing cost.Rare earth element (Re) represents the element of Yi Ge family, have 17 kinds of elements, in the rare earths material using as preparation nodulizing agent, generally only comprise 1-2 element, but seldom it is listed separately to (unless having particular requirement), still with rare earth element total amount (Re), indicate traditionally the content of rare earth element.If do not specified, the rare earth in nodulizing agent generally comprises cerium and two kinds of elements of lanthanum, conventionally claims light rare earths nodulizing agent, and the nodulizing agent also having is done starting material with the rare earth that contains yttrium, and this nodulizing agent is commonly referred to heavy rare earths nodulizing agent.The unit of the oxygen in rare earth element (Re) and molten iron, sulphur, hydrogen and other interference nodularization have stronger affinity interaction, makes molten iron purification, is conducive to the casting flaws such as minimizing is mingled with, subsurface porosity, can reduce the loss of magnesium, improves the specific absorption of magnesium.Calcium has stronger desulfurization, deoxidizing capacity, also has the ability of certain inoculation(effect) and minimizing spoken parts in traditional operas simultaneously.In nodulizing agent, adding calcium can purifying molten iron, promotes greying, and calcium also can form the decomposition that intermetallic compound delay magnesium with magnesium effect, controls absorption and the speed of response of nodulizing agent.Barium add the specific absorption that contributes to improve magnesium, intensive inoculation effect, delayed involution, increases the number of graphite, refinement graphite pebbles.
To sum up analyze, the present invention improves the content of magnesium, has significantly reduced the add-on of nodulizing agent, reduces spheroidizing cost, the effect stability of nodularization simultaneously, and the roundness of globular graphite is good; Add Re, Ca, Ba, Mn and C, can realize purifying molten iron, increase graphite nuclei calculation, promote greying, extend the decaying spheroidisation time, promote forming core thinning microstructure etc. effect, be conducive to improve the comprehensive mechanical performance of nodular iron casting, be applicable to pour method treatment process and spheroidizing completely stable, there is outstanding substantive distinguishing features and significant progressive.
Accompanying drawing explanation
Fig. 1 is the metallograph schematic diagram of ductile iron rare earth Mg-Si nodularizer embodiment of the present invention.
Embodiment
Below the specific embodiment of the present invention is described in further detail; Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
From the photo shown in Fig. 1, can find out the respond well of nodularization, nodulizing agent adopts conventional mix-melting method to produce, and is shaped as irregular bulk, and granularity is between 3-25mm or 5-40mm.
Embodiment 1
Ductile iron rare earth Mg-Si nodularizer of the present invention, the weight percent of wherein said Mg is 12%, the weight percent of Re is 2%, the weight percent of Si is that the weight percent that the weight percent of 45%, Ca is 3.5%, Ba is 1.0%, the weight percent of Mn is 3%, the weight percent of C is that the content of 0.5%, Al is less than 1.5%, and surplus is Fe.
Above-mentioned element, according to conventional mix-melting method and through broken granulation shape, is obtained to ductile iron rare earth Mg-Si nodularizer.
Embodiment 2
Ductile iron rare earth Mg-Si nodularizer of the present invention, the weight percent of wherein said Mg is 13%, the weight percent of Re is 1.5%, the weight percent of Si is that the weight percent that the weight percent of 44%, Ca is 4.5%, Ba is 1.0%, the weight percent of Mn is 2.0%, the weight percent of C is that the content of 1.5%, Al is less than 1.5%, and surplus is Fe.
Above-mentioned element, according to conventional mix-melting method and through broken granulation shape, is obtained to ductile iron rare earth Mg-Si nodularizer.
Embodiment 3
Ductile iron rare earth Mg-Si nodularizer of the present invention, the weight percent of wherein said Mg is 14%, the weight percent of Re is 1.0%, the weight percent of Si is that the weight percent that the weight percent of 42%, Ca is 4%, Ba is 0.8%, the weight percent of Mn is 5%, the weight percent of C is that the content of 0.5%, Al is less than 1.5%, and surplus is Fe.
Above-mentioned element, according to conventional mix-melting method and through broken granulation shape, is obtained to ductile iron rare earth Mg-Si nodularizer.
Embodiment 4
Ductile iron rare earth Mg-Si nodularizer of the present invention, the weight percent of wherein said Mg is 15%, the weight percent of Re is 0.5%, the weight percent of Si is that the weight percent that the weight percent of 50%, Ca is 5.5%, Ba is 0.5%, the weight percent of Mn is 4.0%, the weight percent of C is that the content of 0.8%, Al is less than 1.5%, and surplus is Fe.
Above-mentioned element, according to conventional mix-melting method and through broken granulation shape, is obtained to ductile iron rare earth Mg-Si nodularizer.
The nodulizing agent of making is particulate state, size range 3-25mm; Test magnesium iron trade mark 500-7, spheriodization process thereof is dykes and dams bag and pours method.
Following table is embodiment table:
Note 1: the Chemical Composition of magnesium iron (weight percentage) in table: C 3.82～3.88%, and Si 2.32～2.38%, and Mn 0.16～0.20%, and P 0.036～0.038%, and S 0.018～0.021%, Yu Weitie.
Note 2: performance data is all taken from the test block of 25mmY type.
In conjunction with the embodiments and above-mentioned data can draw: the present invention has improved the content of magnesium, has significantly reduced the add-on of nodulizing agent, reduces spheroidizing cost, the effect stability of nodularization simultaneously, the roundness of globular graphite is good; Add Re, Ca, Ba, Mn and C, can realize purifying molten iron, increase graphite nuclei calculation, promote greying, extend the decaying spheroidisation time, promote forming core thinning microstructure etc. effect, be conducive to improve the comprehensive mechanical performance of nodular iron casting, be applicable to pour method treatment process and spheroidizing completely stable, be that those skilled in the art are difficult to expect, there is outstanding substantive distinguishing features and significant progressive.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (5)
1. a ductile iron rare earth Mg-Si nodularizer, it is characterized in that: its component comprises the C that weight percent is the Mg of 12%-15%, Re that weight percent is 0.5%-2.0%, weight percent is 42%-50% Si, Ca that weight percent is 3.5%-5.5%, Ba that weight percent is 0.5%-1.0%, Mn that weight percent is 2.0%-5.0% and weight percent are 0.5%-1.5%, the content of Al is less than 1.5%, and surplus is Fe;
Above-mentioned element, according to conventional mix-melting method and through broken granulation shape, is obtained to ductile iron rare earth Mg-Si nodularizer.
2. ductile iron rare earth Mg-Si nodularizer according to claim 1, is characterized in that: it is shaped as irregular bulk, granularity between 3-25mm or 5-40mm the ductile iron rare earth Mg-Si nodularizer obtaining.
3. ductile iron rare earth Mg-Si nodularizer according to claim 1, it is characterized in that: the weight percent of described Mg is 12.5%-14.5%, the weight percent of Re is 0.8%-1.8%, the weight percent of Si is 44%-48%, and the weight percent of Ca is 3.8%-5.3%, and the weight percent of Ba is 0.6%-0.9%, the weight percent of Mn is 2.5%-4.5%, the weight percent of C is 0.8%-1.3%, and the content of Al is less than 1.5%, and surplus is Fe.
4. ductile iron rare earth Mg-Si nodularizer according to claim 1, it is characterized in that: the weight percent of described Mg is 13%-14%, the weight percent of Re is 1%-1.5%, the weight percent of Si is 46%-47%, and the weight percent of Ca is 4%-5%, and the weight percent of Ba is 0.7%-0.8%, the weight percent of Mn is 3%-4%, the weight percent of C is 0.9%-1.1%, and the content of Al is less than 1.5%, and surplus is Fe.
5. ductile iron rare earth Mg-Si nodularizer according to claim 1, it is characterized in that: the weight percent of described Mg is 12%, the weight percent of Re is 2%, the weight percent of Si is that the weight percent that the weight percent of 45%, Ca is 3.5%, Ba is 1.0%, the weight percent of Mn is 3%, the weight percent of C is that the content of 0.5%, Al is less than 1.5%, and surplus is Fe.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561743A (en) * | 2014-12-31 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | Nodulizing agent of ductile iron as well as preparation method and application thereof |
| CN105420439A (en) * | 2016-01-07 | 2016-03-23 | 天润曲轴股份有限公司 | Medium-content manganese, magnesium and silicon series nodulizing agent |
| CN108251589A (en) * | 2018-01-31 | 2018-07-06 | 重庆卡森科技有限公司 | A kind of novel nothing breeds nodulizer |
| CN110662847A (en) * | 2017-03-29 | 2020-01-07 | 株式会社Ｉ２Ｃ技研 | Method for producing mold casting product of nodular cast iron having ultrafine spheroidal graphite and spheroidizing agent |
| WO2022202914A1 (en) * | 2021-03-24 | 2022-09-29 | 日立金属株式会社 | Spheroidal graphite cast iron, spheroidal graphite cast iron manufacturing method, and spheroidizing treatment agent |
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| CN101892341A (en) * | 2010-06-12 | 2010-11-24 | 无锡永新特种金属有限公司 | Ductile iron rare earth Mg-Si nodularizer |
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| CN101892341A (en) * | 2010-06-12 | 2010-11-24 | 无锡永新特种金属有限公司 | Ductile iron rare earth Mg-Si nodularizer |
Non-Patent Citations (1)
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| 孙雅心: "球化剂中镁含量对盖包法生产球墨铸铁的影响", 《中国优秀硕士学位论文全文数据库（电子期刊）》, no. 1, 30 November 2006 (2006-11-30), pages 19 - 20 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104561743A (en) * | 2014-12-31 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | Nodulizing agent of ductile iron as well as preparation method and application thereof |
| CN104561743B (en) * | 2014-12-31 | 2016-12-07 | 芜湖国鼎机械制造有限公司 | Spheroidal graphite cast iron nodularizer and preparation method thereof |
| CN105420439A (en) * | 2016-01-07 | 2016-03-23 | 天润曲轴股份有限公司 | Medium-content manganese, magnesium and silicon series nodulizing agent |
| CN110662847A (en) * | 2017-03-29 | 2020-01-07 | 株式会社Ｉ２Ｃ技研 | Method for producing mold casting product of nodular cast iron having ultrafine spheroidal graphite and spheroidizing agent |
| US20220106652A1 (en) * | 2017-03-29 | 2022-04-07 | I2C Co., Ltd | Method for producing die-cast product of spherical graphitic cast iron including ultrafine spherical graphite, and spheroidizing treatment agent |
| US11845999B2 (en) | 2017-03-29 | 2023-12-19 | I2C Co., Ltd | Method for producing die-cast product of spherical graphitic cast iron including ultrafine spherical graphite, and spheroidizing treatment agent |
| CN108251589A (en) * | 2018-01-31 | 2018-07-06 | 重庆卡森科技有限公司 | A kind of novel nothing breeds nodulizer |
| WO2022202914A1 (en) * | 2021-03-24 | 2022-09-29 | 日立金属株式会社 | Spheroidal graphite cast iron, spheroidal graphite cast iron manufacturing method, and spheroidizing treatment agent |
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| CN103525969B (en) | 2016-02-17 |
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