CN109913609A - A kind of cast iron silicon-strontium-zirconium-lanthanum nucleating agent and preparation method thereof - Google Patents
A kind of cast iron silicon-strontium-zirconium-lanthanum nucleating agent and preparation method thereof Download PDFInfo
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- CN109913609A CN109913609A CN201910212046.2A CN201910212046A CN109913609A CN 109913609 A CN109913609 A CN 109913609A CN 201910212046 A CN201910212046 A CN 201910212046A CN 109913609 A CN109913609 A CN 109913609A
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- strontium
- zirconium
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Abstract
The invention discloses a kind of cast iron silicon-strontium-zirconium-lanthanum nucleating agent and preparation method thereof, the silicon 70-75% including weight percentage, strontium 0.6-4%, zirconium 1-5%, lanthanum 2-4%, iron 15-25%.Inovulant of the present invention passes through comprehensive silicon, strontium, zirconium, lanthanum element, while performance each element itself breeds ability, further progress synergistic effect, not will increase Eutectic Cell Number while reducing spoken parts in traditional operas, to obtain the smallest chilling tendency, reduce the disqualification rate of casting, the harm for effectively neutralizing micro low-melting-point metal forms the substrate of a large amount of graphite crystallizations, can be obviously improved graphite structure, the mechanical performance of casting is improved, and reduces the sensitivity profile and chilling tendency of casting.
Description
Technical field
The present invention relates to a kind of cast iron silicon-strontium-zirconium-lanthanum nucleating agents and preparation method thereof, belong to casting technology field.
Background technique
Cast iron be it is carbon containing be greater than 2.1% iron-carbon alloy, it be by foundry iron (part conversion pig) in furnace again
Fusing, and add ferroalloy, steel scrap, foundry return adjusting component and obtain.Be cast iron be secondary operation with pig iron difference, mostly plus
Work is at ironcasting.There is ironcasting excellent castability can be made into complex parts, generally there is good machinability.In addition have
There are wearability and absorb shock resistance good, the features such as price is low.
Currently, improving the performance of gray cast iron, following several measures are often taken:
(1) reasonable selection of chemical component
The phosphorus content of gray cast iron is mostly 2.6%~3.6%, and for silicon content 1.2%~3.0%, carbon silicon is all consumingly
Promote graphited element, their influences to gray cast iron metallographic structure and mechanical property can be illustrated with carbon equivalent ce.It improves
Carbon equivalent promotes to be graphitized thicker, and quantity increases, intensity and hardness decline.Graphite can be reduced by reducing carbon equivalent, refine stone
Ink increases and just analyses austenite dendrites, to be the measure for improving Mechanical Properties of Grey Cast Iron and taking often.But reducing carbon equivalent can lead
The problems such as cause casting character reduces, and casting section sensibility increases, and casting internal stress increases, and hardness rises processing difficulties, therefore
Other measures must be aided with.
(2) change charge composition
The furnace charge of gray cast iron is generally made of the new pig iron, steel scrap, foundry returns and ferroalloy etc..Steel scrap is added, reduces iron liquid
The mechanical property of gray cast iron can be improved in phosphorus content, will be added in the different trade mark gray cast iron of life the steel scrap of different proportion as
Guarantee a Con trolling index of material capability.In recent years due to industrially developed country's steel scrap supply it is very abundant, price also far beyond
The new pig iron is cheap, has then developed and has not had to the new pig iron only with steel scrap and foundry returns, has been cast with the synthesis that carburetion method adjusts carbon amounts
Iron and its smelting process.Synthetic cast iron can not only reduce cost, and better mechanics can be obtained under same chemical component
Performance.
(3), iron liquid Overheating Treatment
Temperature, chemical component, degree of purity are three main metallurgical indexs of iron liquid, and the direct shadow of the height of bonded hard ferrite magnet
It rings and arrives ingredient and degree of purity.The raising of bonded hard ferrite magnet is conducive to improve mobility, obtains and perfect casting, reduces rejection rate, and
Be conducive to the improvement of mechanical property in a certain range.
(4), iron liquid inoculation
Inoculation is exactly inovulant to be attached to the metallurgy for changing iron liquid in iron liquid before iron liquid enters casting type chamber
State, so as to improve the microscopic structure and performance of cast iron, and the improvement of these performances can not be due to iron liquid after addition inovulant
The variation of chemical component is explained.With the improvement of inovulant, inoculation method, inoculation is improved in modern Foundry Production
The important means of cast iron.
Existing inoculation has the following disadvantages: the inovulant uneven components of 1, mechanical mixture, there are component segregation,
The cast properties produced are inconsistent；2, the practical effect of inovulant is mixed often not as good as a kind of inovulant is used alone
Effect is obvious, cannot play the due effect of element in inovulant well；3, higher calcium content and aluminium content are to molten iron
Pregnant effect it is poor, and calcium and aluminium have strong reduction, in molten iron sulphur and oxygen element react and to form oxidizing slag,
Influence molten steel quality.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide one kind to prevent effective element
The cast iron inovulant that segregation, effectively performance silicon, strontium, zirconium, lanthanum act synergistically.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is as follows:
A kind of cast iron silicon-strontium-zirconium-lanthanum nucleating agent, including following components in percentage by weight:
Silicon 70-75%；
Strontium 0.6-4%；
Zirconium 1-5%；
Lanthanum 2-4%；
Iron 15-25%.
Wherein, the addition of strontium element not will increase Eutectic Cell Number while reducing spoken parts in traditional operas, to obtain the smallest spoken parts in traditional operas
Tendency, reduces the disqualification rate of casting.
The addition of zr element can help to control nitrogen content, extend pregnant effect, and eliminate influence of the nitrogen to casting；It can be bright
It is aobvious to improve graphite structure, the mechanical performance of casting is improved, and reduce the sensitivity profile and chilling tendency of casting.
The addition of lanthanum element can effectively neutralize the harm of micro low-melting-point metal, form the substrate of a large amount of graphite crystallizations,
Be conducive to iron liquid and form a large amount of tiny graphite in solidification.
Specifically, the silicon, ferro element come from Antaciron, wherein silicone content be 72~78%, iron content be 16~
28%.
The strontium element comes from Preparation of Metallic Strontium.
The zr element comes from metal zirconium.
The lanthanum element comes from lanthanoid metal.
The present invention further provides above-mentioned cast iron silicon-strontium-zirconium-lanthanum nucleating agent preparation methods, include the following steps:
(1) Antaciron, Preparation of Metallic Strontium, metal zirconium and lanthanoid metal are proportionally weighed, and is broken into fritter；
(2) broken raw material is put into medium-frequency induction furnace and carries out melting, smelting temperature is 1280-1410 DEG C, and the time is
15~25min needs constantly to stir in fusion process, so that raw material adequately mixes；
(3) after melting, slurry is poured into the water cooling model filled with inert protective gas；
(4) it is crushed and pelletizes after ingot casting is cooling to obtain the final product.
The utility model has the advantages that
Inovulant of the present invention is by comprehensive silicon, strontium, zirconium, lanthanum element, while performance each element itself breeds ability, into one
Step acts synergistically, and not will increase Eutectic Cell Number while reducing spoken parts in traditional operas, to obtain the smallest chilling tendency, reduces
The disqualification rate of casting effectively neutralizes the harm of micro low-melting-point metal, forms the substrate of a large amount of graphite crystallizations, can be obviously improved
Graphite structure, improves the mechanical performance of casting, and reduces the sensitivity profile and chilling tendency of casting.
Specific embodiment
According to following embodiments, the present invention may be better understood.
Embodiment 1
Cast iron silicon-strontium-zirconium-the lanthanum nucleating agent includes following components in percentage by weight:
Silicon 72%；
Strontium 2%；
Zirconium 3%；
Lanthanum 3%；
Iron 20%.
By by Antaciron (silicone content 72~75%, iron content 20~25%), Preparation of Metallic Strontium, metal zirconium and lanthanoid metal,
And it is broken into fritter；Be then placed in medium-frequency induction furnace carry out melting, smelting temperature be 1280-1410 DEG C, the time be 15~
25min needs constantly to stir in fusion process, so that raw material adequately mixes；After melting, by slurry be poured into filled with
In the water cooling model of inert protective gas；It is crushed and pelletizes after ingot casting is cooling to obtain the final product.
Embodiment 2
Cast iron silicon-strontium-zirconium-the lanthanum nucleating agent includes following components in percentage by weight:
Silicon 70%；
Strontium 4%；
Zirconium 5%；
Lanthanum 4%；
Iron 17%.
By by Antaciron (silicone content 72~75%, iron content 16~25%), Preparation of Metallic Strontium, metal zirconium and lanthanoid metal,
And it is broken into fritter；Be then placed in medium-frequency induction furnace carry out melting, smelting temperature be 1280-1410 DEG C, the time be 15~
25min needs constantly to stir in fusion process, so that raw material adequately mixes；After melting, by slurry be poured into filled with
In the water cooling model of inert protective gas；It is crushed and pelletizes after ingot casting is cooling to obtain the final product.
Embodiment 3
Cast iron silicon-strontium-zirconium-the lanthanum nucleating agent includes following components in percentage by weight:
Silicon 74%；
Strontium 0.6%；
Zirconium 1%；
Lanthanum 2%；
Iron 22.4%.
By by Antaciron (silicone content 75~78%, iron content 25~28%), Preparation of Metallic Strontium, metal zirconium and lanthanoid metal,
And it is broken into fritter；Be then placed in medium-frequency induction furnace carry out melting, smelting temperature be 1280-1410 DEG C, the time be 15~
25min needs constantly to stir in fusion process, so that raw material adequately mixes；After melting, by slurry be poured into filled with
In the water cooling model of inert protective gas；It is crushed and pelletizes after ingot casting is cooling to obtain the final product.
Embodiment 4
Examples 1 to 3 product is used in Cast Iron Production, the cast iron produced and common process (inovulant is not added) produce
Cast iron compare, can effectively eliminate that casting is microcosmic loose, reduce the sensitivity profile and chilling tendency of casting, and have good
High temperature resistant, corrosion resistant performance, and there is good intensity and toughness, good combination property, design parameter is shown in Table 1.
Table 1
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Common process |
| Content of pearlite in alloy % | 95.8 | 94.6 | 94.1 | 76.4 |
| Tensile strength MPa | 312 | 305 | 307 | 251 |
| Hardness HB | 241 | 234 | 236 | 182 |
The present invention provides a kind of cast iron thinkings and method of silicon-strontium-zirconium-lanthanum nucleating agent and preparation method thereof, specifically
Realize that there are many method and the approach of the technical solution, the above is only a preferred embodiment of the present invention, it is noted that for
For those skilled in the art, without departing from the principle of the present invention, can also make it is several improvement and
Retouching, these modifications and embellishments should also be considered as the scope of protection of the present invention.Each component part being not known in the present embodiment
It is realized with the prior art.
Claims (6)
1. a kind of cast iron silicon-strontium-zirconium-lanthanum nucleating agent, which is characterized in that including following components in percentage by weight:
Silicon 70-75%；
Strontium 0.6-4%；
Zirconium 1-5%；
Lanthanum 2-4%；
Iron 15-25%.
2. cast iron according to claim 1 silicon-strontium-zirconium-lanthanum nucleating agent, which is characterized in that the silicon, ferro element come
From Antaciron, wherein silicone content is 72~78%, and iron content is 16~28%.
3. cast iron according to claim 1 silicon-strontium-zirconium-lanthanum nucleating agent, which is characterized in that the strontium element comes from
Preparation of Metallic Strontium.
4. cast iron according to claim 1 silicon-strontium-zirconium-lanthanum nucleating agent, which is characterized in that the zr element comes from
Metal zirconium.
5. cast iron according to claim 1 silicon-strontium-zirconium-lanthanum nucleating agent, which is characterized in that the lanthanum element comes from
Lanthanoid metal.
6. cast iron described in claim 1 silicon-strontium-zirconium-lanthanum nucleating agent preparation method, which is characterized in that including walking as follows
It is rapid:
(1) Antaciron, Preparation of Metallic Strontium, metal zirconium and lanthanoid metal are proportionally weighed, and is broken into fritter；
(2) broken raw material being put into medium-frequency induction furnace and carries out melting, smelting temperature is 1280-1410 DEG C, the time is 15~
25min needs constantly to stir in fusion process, so that raw material adequately mixes；
(3) after melting, slurry is poured into the water cooling model filled with inert protective gas；
(4) it is crushed and pelletizes after ingot casting is cooling to obtain the final product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438392A (en) * | 2019-08-20 | 2019-11-12 | 新沂永新机械配件有限公司 | A kind of nitrogenous composite inoculant greatly improving cast iron |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925784A (en) * | 2012-10-21 | 2013-02-13 | 吉林大学 | Inoculant for refining gray cast iron texture and preparation method and application thereof |
| CN105238987A (en) * | 2015-10-30 | 2016-01-13 | 成都宏源铸造材料有限公司 | Preparation method and application of gray pig iron nucleating agent |
| CN105238988A (en) * | 2015-10-30 | 2016-01-13 | 成都宏源铸造材料有限公司 | Preparing method and application of gray iron inoculant |
| CN108950120A (en) * | 2018-06-29 | 2018-12-07 | 石家庄北科德瑞冶金材料有限公司 | A kind of cast iron silicon-lanthanum-strontium inovulant and preparation method thereof |
-
2019
- 2019-03-20 CN CN201910212046.2A patent/CN109913609A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925784A (en) * | 2012-10-21 | 2013-02-13 | 吉林大学 | Inoculant for refining gray cast iron texture and preparation method and application thereof |
| CN105238987A (en) * | 2015-10-30 | 2016-01-13 | 成都宏源铸造材料有限公司 | Preparation method and application of gray pig iron nucleating agent |
| CN105238988A (en) * | 2015-10-30 | 2016-01-13 | 成都宏源铸造材料有限公司 | Preparing method and application of gray iron inoculant |
| CN108950120A (en) * | 2018-06-29 | 2018-12-07 | 石家庄北科德瑞冶金材料有限公司 | A kind of cast iron silicon-lanthanum-strontium inovulant and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438392A (en) * | 2019-08-20 | 2019-11-12 | 新沂永新机械配件有限公司 | A kind of nitrogenous composite inoculant greatly improving cast iron |
| CN110438392B (en) * | 2019-08-20 | 2020-09-01 | 新沂永新机械配件有限公司 | Nitrogen-containing compound inoculant for greatly improving cast iron performance |
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