CN103525968B - Cover material covering nodularizer in graphite spheroidizing of cast iron - Google Patents
Cover material covering nodularizer in graphite spheroidizing of cast iron Download PDFInfo
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- CN103525968B CN103525968B CN201210352902.2A CN201210352902A CN103525968B CN 103525968 B CN103525968 B CN 103525968B CN 201210352902 A CN201210352902 A CN 201210352902A CN 103525968 B CN103525968 B CN 103525968B
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- covering material
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- graphite
- cast iron
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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
- C21C1/10—Making spheroidal graphite cast-iron
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention provides a cover material to obtain a graphite nodularizer used in the production of spheroidal graphite cast iron and having the advantages of light weight, convenient operation and deslagging agent effects in a high-temperature severe operation environment. The cover material is a volcanic silicate mineral, and is produced into a porous material consisting of 70-75 wt% of SiO2, 12-14 wt% of Al2O3, 3-5 wt% of K2O, 3-4 wt% of Na2O, 0.7-1.5 wt% of CaO, 1.2-1.5 wt% of Fe2O3, 0.1-0.2 wt% of MgO, and 0.05-0.1 wt% of TiO2.
Description
Technical field
The present invention relates to the covering material of graphite pebbles agent used when manufacturing spheroidal graphite cast iron, more particularly, relate to quality light work in the harsh operating environment of high temperature easy and have the covering material of the effect of deslagging agent concurrently.
Background technology
In the past, this nodular cast iron manufacturing technology be by the smelting process being used for obtaining suitable molten metal, doctor treatment, spheroidization of graphite facture and be used for obtaining firmly mold molding, also have casting etc. to carry out preferably combination to form.
Smelting process, molding and casting are common for the castings of plain cast iron, and doctor treatment and spheroidization of graphite treatment process are the distinctive technology when manufacturing nodular cast iron.
As spheroidization of graphite treatment agent, the past mainly uses the REM containing Ce or also uses Ca etc., but mainly uses Mg now.
In addition, when the spheroidization of graphite process carrying out cast iron, in order to control the vigorous reaction of graphite pebbles agent and realize stable nodularization, and employ covering material, this covering material is for the top of the nodulizing agent and Mg alloy that cover the bottom being positioned over water bucket.
As this covering material, can adopt Fe-Si alloy, Fe alloy etc., covering material preferably covers graphite pebbles agent.
Specifically, be use the material that punching press iron filings or the iron such as iron nail cap or ferrosilicon are main component.
[prior art document]
Patent documentation 1: Japanese Unexamined Patent Publication 08-020812 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2002-097509 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2010-095752 publication
The main component of above-mentioned covering material is in the past the heavier iron of proportion, and therefore proportion is 4.5 larger ~ 7.8g/cm
3, be difficult to process easily.
Therefore, in requiring the spheroidal graphite carrying out overwrite job under hot environment in the short period of time exactly to cast, this is the material having difficult point, and wishes to alleviate working load.
In addition, in order to control the vigorous reaction of graphite pebbles agent, realize stable nodularization, the object of this covering material is the contact surface of ball covering on soil agent and molten metal, wishes that the volume of per unit weight is large and the covering material that can obtain with cheapness.
And then, in the melting operation of spheroidal graphite cast iron, carry out spheroidization of graphite in water bucket while, also carry out the inoculation for adjusting cast iron composition.
Now, be not that the whole amount of each additive is all infiltrated, but a part floats on fused solution as the slag of impurity, therefore, if also propose not remove this floating matter, the problem of bad product can be produced.
Summary of the invention
Therefore, for realizing above-mentioned each object, the feature of the covering material of the graphite pebbles agent of the spheroidal graphite cast iron that the present invention relates to is: this covering material is vulcanicity silicate minerals, and is made for the SiO containing 70 ~ 75 % by weight
2, 12 ~ 14 % by weight Al
2o
3, 3 ~ 5 % by weight K
2o, 3 ~ 4 % by weight Na
2o, the CaO of 0.7 ~ 1.5 % by weight, the Fe of 1.2 ~ 1.5 % by weight
2o
3, the MgO of 0.1 ~ 0.2 % by weight, the TiO of 0.05 ~ 0.1 % by weight
2the particle of Porous.
The feature of the invention of the covering material of the graphite pebbles agent of technical scheme 2 is, this covering material is that the form of the granular solid of the Porous of 5mm or less is formed with particle diameter, and bulk specific gravity is 0.5 ~ 1.0g/cm
3, with in the past be main component with punching press bits or the iron such as the head of a nail or ferrosilicon covering material compares, weight significantly alleviates and easy and simple to handle, can cover graphite pebbles agent exactly.
In addition, the feature of the invention of technical scheme 3 is, in order to make the stickiness of graphite pebbles agent good, according to shape and the capacity of water bucket, in addition, consider the reaction times of melt temperature and graphite pebbles agent, to be shaped to particle diameter be the spherical of 5mm ~ 10mm or length is the bar-shaped of 5mm ~ 10mm, to obtain target mechanical properties.
And then, the feature of the invention of technical scheme 4 is, can obtain the covering material of following graphite pebbles agent: the melt temperature of covering material is 1100 ~ 1200 DEG C, its fusing post-foaming expands and floats on liquid level floating, has the effect be combined with the scum silica frost of impurity.
The covering material of graphite pebbles agent of the present invention be in order to 70 ~ 75 % by weight vulcanicity silicate minerals and SiO
2material as the particle of the Porous of main component provides the covering material of the graphite pebbles agent of spheroidal graphite cast iron, therefore, can cheap and significantly weight reduction, the effect realizing improving workability can be obtained.
The covering material of graphite pebbles agent of the present invention is that to make proportion be 0.5 ~ 1.0g/cm
3and particle diameter is the granular solid of the Porous of 5mm or less, to be shaped to particle diameter be the spherical of 5mm ~ 10mm or length is the bar-shaped of 5mm ~ 10mm, thus, reliably carry out the blocking-up of molten metal and graphite pebbles agent, by temperature or the loading level of molten metal, and set suitable fusing and the reaction times of spheroidization of graphite with selected shape and profile.
The covering material of graphite pebbles agent of the present invention melts at 1100 ~ 1200 DEG C, and floats on liquid level, therefore, is combined with the non-macerate of the slag or graphite pebbles agent that float on the fusing on liquid level, can obtain the effect of removing impurity.
Float on the slag of the fusing on liquid level or the impurity of graphite pebbles agent, detrimentally affect is brought to the product of spheroidal graphite casting, therefore must remove, also can obtain the effect of the amount reducing deslagging agent.
Accompanying drawing explanation
The microphotograph of the covering material that the present invention of Fig. 1 to be particle diameter be 1.7mm ~ 5.0mm relates to.
The microphotograph of the covering material that the present invention of Fig. 2 to be particle diameter be 0.1mm ~ 0.3mm relates to.
The covering material microphotograph that to be 0.1mm or less and 0.1 ~ 0.3mm be (1/1) the present invention that Fig. 3 is particle diameter relates to.
Fig. 4 is the microphotograph of the covering material of existing use punching press iron filings.
Embodiment
For the vulcanicity silicate minerals and the SiO that contain 70 ~ 75 % by weight
2as the Porous particle of main component, the larger then cementability of its particle is less, in shaping when particle diameter is 0.3mm ~ 5mm, must use tackiness agent.
According to size-grade distribution, use the water glass of 3 ~ 15 % by weight or wilkinite to carry out rotating or extruding, granulating by implementing compression, the covering material of graphite pebbles agent can be obtained.
And then, the particle of porous material at 0.3mm or less and the size-grade distribution of the particle of 0.1mm or less more than 50% time, make moisture be 10 ~ 15 % by weight, and to come shaping be effective especially by carrying out as tackiness agent extruding or compress.
When the covering material of the graphite pebbles agent as spheroidal graphite cast iron uses the particle of Porous, preferably make moisture be 1.0 % by weight or less, more preferably carry out moisture adjustment by Exposure to Sunlight or the envrionment conditions such as heating or air-supply.
Then, the embodiment of the use of the covering material of the graphite pebbles agent obtained for the particle of the Porous by vulcanicity silicate minerals of foregoing invention is described.
(embodiment 1)
In the high frequency melting furnace of plumbago crucible No. 15 (2.5L), with gross weight 6000g, the pig iron and foundry returns, carburelant and nucleating agent and spherical (LCS4) are obtained iron liquid with the same terms pouring in method spheroidization of graphite pack processing, the moiety using the covering material comprising the graphite nodulizing agent of covering material of the present invention to carry out the spheroidal graphite cast iron of spheroidizing reacion has been carried out to analysis, compared, and result is as shown in table 1.
[table 1]
(% by weight)
| The kind of the covering material of graphite pebbles agent | C | Si | Mn | P | S | Mg |
| Punching press iron filings (covering material in the past) | 3.34 | 2.61 | 0.20 | 0.017 | 0.003 | 0.026 |
| 1.7 ~ 5mm (embodiment of the present invention) | 3.50 | 2.59 | 0.19 | 0.020 | 0.006 | 0.023 |
| 0.1 ~ 0.3mm (embodiment of the present invention) | 3.42 | 2.55 | 0.20 | 0.019 | 0.007 | 0.027 |
| 0.1 or less/0.1 ~ 0.3mm (1/1) (the invention process | 3.45 | 2.55 | 0.18 | 0.021 | 0.006 | 0.025 |
| Example) |
(embodiment 2)
In embodiment 1, compare the mechanical properties of the test body produced with the covering material of the graphite nodulizing agent of melting, be comparatively shown in table 2 with the JIS specification as spheroidal graphite cast iron.
Result shows, the spheroidal graphite cast iron employing covering material of the present invention fully meets specification.[table 2]
(embodiment 3)
In embodiment 1, for the Oxygen potential that the covering material of the graphite nodulizing agent using melting makes, process with the nital corrosive fluid of 5%, and to compare under field range (width) 0.98mm multiplying power 100 × 0.8 times, result is as shown in table 3.
[table 3]
Above, the result of covering material of the present invention is employed as shown in table 1 to table 3 in the spheroidization of graphite process of cast iron, serve the action effect with punching press iron filings equal extent in the past, and compared with punching press iron filings, there is the special-effect that quality is light, easy and simple to handle, in addition, float on liquid level after fusing can also be obtained and remove impurity, thus make the effect of deslagging agent decrement.
Claims (4)
1. during the spheroidization of graphite process of cast iron, the covering material on ball covering on soil agent top, is characterized in that,
This covering material is with the vulcanicity silicate minerals of 70 ~ 75 % by weight and SiO
2as the material of the Porous particle of main component, and be made for the Al containing 12 ~ 14 % by weight
2o
3, 3 ~ 5 % by weight K
2o, 3 ~ 4 % by weight Na
2o, the CaO of 0.7 ~ 1.5 % by weight, the Fe of 1.2 ~ 1.5 % by weight
2o
3, the MgO of 0.1 ~ 0.2 % by weight, the TiO of 0.05 ~ 0.1 % by weight
2the particle of Porous.
2. during the spheroidization of graphite process of cast iron according to claim 1, the covering material on ball covering on soil agent top, is characterized in that,
This covering material is proportion is 0.5 ~ 1.0g/cm
3, particle diameter is the Porous granular solid of 5mm or less.
3. during the spheroidization of graphite process of cast iron according to claim 1 and 2, the covering material on ball covering on soil agent top, is characterized in that,
It is the spherical of 5mm ~ 10mm or length is the bar-shaped of 5mm ~ 10mm that this covering material is shaped to particle diameter, melts and float on liquid level when contacting with the molten metal of cast iron, and promotes the reaction being arranged at the graphite pebbles agent of bottom.
4. during the spheroidization of graphite process of cast iron according to claim 1 and 2, the covering material on ball covering on soil agent top, is characterized in that,
The temperature of fusion of this covering material is 1100 ~ 1200 DEG C, floats on liquid level after its fusing, and is combined with the floating scum silica frost containing impurity and has the effect as deslagging agent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012152586A JP5138114B1 (en) | 2012-07-06 | 2012-07-06 | Cover material covering the upper part of the spheroidizing agent during the spheroidizing treatment of cast iron |
| JP2012-152586 | 2012-07-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103525968A CN103525968A (en) | 2014-01-22 |
| CN103525968B true CN103525968B (en) | 2015-06-17 |
Family
ID=47789817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210352902.2A Active CN103525968B (en) | 2012-07-06 | 2012-09-20 | Cover material covering nodularizer in graphite spheroidizing of cast iron |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5138114B1 (en) |
| KR (1) | KR101560034B1 (en) |
| CN (1) | CN103525968B (en) |
| TW (1) | TWI439549B (en) |
Families Citing this family (8)
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|---|---|---|---|---|
| CN103589826B (en) * | 2013-10-30 | 2015-12-02 | 吴江市液铸液压件铸造有限公司 | A kind of molten iron skim agent and preparation method thereof |
| CN105039630A (en) * | 2015-08-20 | 2015-11-11 | 合肥市田源精铸有限公司 | Titanium-containing efficient slag remover and preparing method |
| JP6235178B1 (en) * | 2017-03-01 | 2017-11-22 | 石川ライト工業株式会社 | Control material and control material manufacturing method |
| CN107460277A (en) * | 2017-06-21 | 2017-12-12 | 河池市森机械有限责任公司 | The preparation method of deslagging agent |
| CN109487151A (en) * | 2018-12-21 | 2019-03-19 | 孙小军 | A kind of medical stone gray cast iron cooker and preparation method thereof |
| CN109702153B (en) * | 2019-01-25 | 2020-12-08 | 宁波日星铸业有限公司 | Improved process of wind power nodular cast iron hub pouring control method |
| CN114797661A (en) * | 2022-04-22 | 2022-07-29 | 丹晟实业（上海）有限公司 | Heat-preservation deslagging sand preparation device for molten metal and preparation method thereof |
| CN115261545B (en) * | 2022-06-13 | 2024-01-30 | 天润工业技术股份有限公司 | Method for reducing shrinkage of iron casting |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032959A (en) * | 1987-11-04 | 1989-05-17 | 唐国进 | Floss collecting agent for temperature isolation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532761B2 (en) * | 1972-02-02 | 1980-08-27 | ||
| JPS5686652A (en) * | 1979-12-14 | 1981-07-14 | Asahi Malleable Iron Co Ltd | Covering method of spheroidizing material |
| JPH0711021B2 (en) * | 1990-08-02 | 1995-02-08 | 三菱重工業株式会社 | Method for spheroidizing molten cast iron |
| JPH0841517A (en) * | 1994-07-25 | 1996-02-13 | Daihatsu Kinzoku Kogyo Kk | Production of spheroidal graphite cast iron and graphite spheroidizing auxiliary tool |
| JP4974591B2 (en) * | 2005-12-07 | 2012-07-11 | 旭テック株式会社 | Graphite spheroidizing agent and method for producing spheroidal graphite cast iron using the same |
-
2012
- 2012-07-06 JP JP2012152586A patent/JP5138114B1/en active Active
- 2012-08-24 TW TW101130847A patent/TWI439549B/en active
- 2012-09-20 CN CN201210352902.2A patent/CN103525968B/en active Active
- 2012-11-08 KR KR1020120126244A patent/KR101560034B1/en active IP Right Grant
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032959A (en) * | 1987-11-04 | 1989-05-17 | 唐国进 | Floss collecting agent for temperature isolation |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101560034B1 (en) | 2015-10-13 |
| CN103525968A (en) | 2014-01-22 |
| TW201402826A (en) | 2014-01-16 |
| TWI439549B (en) | 2014-06-01 |
| JP5138114B1 (en) | 2013-02-06 |
| KR20140005746A (en) | 2014-01-15 |
| JP2014015644A (en) | 2014-01-30 |
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