CN106048125A - High-performance nodulizing agent - Google Patents
High-performance nodulizing agent Download PDFInfo
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- CN106048125A CN106048125A CN201610357792.7A CN201610357792A CN106048125A CN 106048125 A CN106048125 A CN 106048125A CN 201610357792 A CN201610357792 A CN 201610357792A CN 106048125 A CN106048125 A CN 106048125A
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- China
- Prior art keywords
- nodulizing
- performance
- nodulizer
- rare earth
- percentage
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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
- C21C1/105—Nodularising additive agents
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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 discloses a high-performance nodulizing agent which is prepared from, by weight, 16% of (Mg+Si), 3.2% of Re, 2.4% of Ca, 2.1% of Ba, 0.05% of Mn, 0.03% of Ti, 1.2% of Ni, 1.1% of rare earth and the balance Fe. The rare earth formed by yttrium oxide, gadolinium oxide and cerium oxide is adopted by the prepared nodulizing agent, so that the capacities of purifying of iron liquid, nodulizing, nodulizing degradation resistance and graphite degeneration resistance of the prepared nodulizing agent are greatly enhanced; moreover, the reversion phenomenon can be prevented, the casting quality is improved, the boiling point is high, interference of anti-nodulizing elements can be restrained, impact toughness of ductile cast iron can be improved, and the nodulizing agent has the characteristics of saving energy and preventing pollution; the nodulizing degradation phenomenon of ductile cast iron can be effectively restrained, and meanwhile nodulizing reaction time can be precisely controlled; the strength, hardness and heat resistance of alloy can be effectively improved through the cooperative effect of all added elements; and the high-performance nodulizing agent has the characteristics of being low in energy consumption, small in pollution and low in production cost.
Description
Technical field
The present invention relates to molding sand and make field, particularly relate to a kind of high-performance nodulizer.
Background technology
The nodulizer of production and selling generally Re3Mg7-9 or Re5Mg7-9 in the market.Rare earth and content of magnesium are inclined
High.There is problems in that the production cost of nodulizer is higher；Abnormal nodularizing makes mechanical property drastically decline, it is impossible to reach corresponding
Index, wherein major reason is exactly
The residual quantity of magnesium and rare earth content is not enough；The severity of molten iron boiling when spheroidising, and with high light and magnesium steam safety
Hidden danger, skin and eye irritation to people are big, and temperature fall is big simultaneously, and foundry goods can be made pore, cold shut, underpriming occur
Etc. defect；The absorbance of magnesium is declined by molten iron, molten iron to the absorption of magnesium typically when 4-6% absorbance reach 70%, along with the increasing of magnesium
The absorbance of magnesium is begun to decline by hot metal charging, and when reaching 8%, absorbance only has 50%, only has 45% when 9%.
Because the defect that above-mentioned existing nodulizer and production method thereof exist, the present inventor is based on being engaged in this series products
Manufacture and design for many years abundant practical experience and Professional knowledge, and coordinate the utilization of scientific principle, the most in addition research and innovation, to wound
If a kind of nodulizer so that it is have more practicality.Through constantly research, design, and after repeatedly studying sample and improving, eventually
In creating the present invention having practical value.
Summary of the invention
It is an object of the invention to provide a kind of high-performance nodulizer.
The present invention is achieved through the following technical solutions:
A kind of high-performance nodulizer, is made up of following component by weight percentage, Mg+Si 16%, Re3.2%, Ca2.4%,
Ba2.1%, Mn0.05%, Ti0.03%, Ni1.2%, rare earth 1.1%, remaining is Fe；
In described Mg+Si16%, the desirable scope of percentage by weight of Mg is 5.8-6.2%, the desirable model of percentage by weight of described Si
Enclose for 9.8-10.2%, Mg and Si weight percent content and keep definite value 16%；
Described rare earth is made up of following component in percentage terms: yittrium oxide 35%, Gadolinia. 30%, cerium oxide 35%；
Further, the particle diameter of described Nodulizing agent for nodular cast iron is 6-8mm.
Further, proportioning when described Nodulizing agent for nodular cast iron uses is pressed 1.3-1.6 kilogram/and is added.
The preparation method of a kind of high-performance nodulizer, is made up of following making step:
1) raw material is chosen by each element weight percent；
2) by 1) material that takes joins and carries out melting in electric induction furnace；
3) come out of the stove when temperature reaches 1250 DEG C ~ 1350 DEG C, aluminium alloy is poured in the wharve of airtight multilamellar and be cooled to room temperature；
4) by 3) aluminium alloy that cools down is crushed to required particle diameter, is processed into final package packing.
Silicon is extremely strong graphite element, and addition is too low easily to be occurred when molten alloy spraying stove phenomenon, a lot of factories
Family all occurs because spray stove causes casualties accident.The too high not only added cost of addition, and there will be alloy structure and loosen,
Component segregation.The present invention by silicon in nodulizer and magnesium content done big component analysis and experiment, find when magnesium and silicon
Content and account for nodulizer quality 16% time, it is possible to significantly improve the performance of nodulizer, under as cast condition, obtain high-toughness ductile iron
Tensile strength brings up to 478.4 MPa, makes the absorbance of magnesium be brought up to 87.57% by the 48.67% of conventional nodulizer.
The present invention is by the rare earth of interpolation 1.1% in nodulizer, and rare earth is by yittrium oxide 35%, Gadolinia. 30%, oxidation
Cerium 35% is made, so that the nodulizer made obtains in purifying molten iron, nodularization, anti-decaying spheroidisation, anti-graphite morphology ability
Strengthening greatly, and be possible to prevent reversion phenomenon, improve the quality of foundry goods, boiling point is high, tension-active element can be suppressed to disturb, energy
Enough improve the impact flexibility of magnesium iron.
Calcium is the deficiency that strong graphite element can effectively make up rare earth and magnesium, suppresses the boiling of magnesium simultaneously.But calcium is at ferrum
Dissolubility in water is limited, low weak effect, and high occur inverted chill phenomenon on the contrary, and the present invention is determined by great many of experiments
The addition of calcium coordinates and adds a certain amount of aluminum and titanium, not only increases calcium effect originally, it is thus also avoided that inverted chill phenomenon
Appearance, tensile strength, toughness and the dynamic property of spheroidal graphite cast-iron is had great castering action.Barium is strong graphite element
Can purifying molten iron, the effect such as delayed involution.Barium forms the protecting film of thin layer and prevents sulfur, oxygen secondary from entering ferrum on molten iron surface
Water.
By the coordinated effect of manganese, nickel and titanium, it is possible to prevent nodulizer from floating to molten iron surface and be burned off, favourable ball
Change, it is possible to increase the molten iron absorbance to magnesium.
The invention has the beneficial effects as follows, compared with prior art:
The nodulizer that the present invention prepares uses the rare earth being made up of yittrium oxide, Gadolinia., cerium oxide, so that the nodularization made
Agent has obtained great reinforcement in purifying molten iron, nodularization, anti-decaying spheroidisation, anti-graphite morphology ability, and has been possible to prevent reversion
Phenomenon, improves the quality of foundry goods, and boiling point is high, tension-active element can be suppressed to disturb, it is possible to increase the impact flexibility of magnesium iron, has joint
Energy, antipollution feature；Can effectively suppress " decaying spheroidisation " phenomenon of magnesium iron, when accurately can control spheroidizing reacion simultaneously
Between；The synergism that coordinates of each addition element can be effectively improved the intensity of alloy, hardness and heat resistance；Have energy consumption low,
Pollute the feature little, production cost is low.
Detailed description of the invention
A kind of high-performance nodulizer, is made up of following component by weight percentage, Mg+Si 16%, Re3.2%,
Ca2.4%, Ba2.1%, Mn0.05%, Ti0.03%, Ni1.2%, rare earth 1.1%, remaining is Fe；
In described Mg+Si16%, the desirable scope of percentage by weight of Mg is 5.8-6.2%, the desirable model of percentage by weight of described Si
Enclose for 9.8-10.2%, Mg and Si weight percent content and keep definite value 16%；
Described rare earth is made up of following component in percentage terms: yittrium oxide 35%, Gadolinia. 30%, cerium oxide 35%.
Further, the particle diameter of described Nodulizing agent for nodular cast iron is 6-8mm.
Further, proportioning when described Nodulizing agent for nodular cast iron uses is pressed 1.3-1.6 kilogram/and is added.
The preparation method of a kind of high-performance nodulizer, is made up of following making step:
1) raw material is chosen by each element weight percent；
2) by 1) material that takes joins and carries out melting in electric induction furnace；
3) come out of the stove when temperature reaches 1250 DEG C ~ 1350 DEG C, aluminium alloy is poured in the wharve of airtight multilamellar and be cooled to room temperature；
4) by 3) aluminium alloy that cools down is crushed to required particle diameter, is processed into final package packing.
Comparative example 1: nodulizer QRMg6Re5:Mg6%, Si 8%, Re5%, Ca0.8%, Mn1.6%, Ti1%, Ni0.5%, its
Remaining is Fe；
Comparative example 2: nodulizer: Mg5, Si 11%, Re3.2%, Ca2.4%, Ba2.1%, Mn0.05%, Ti0.03%, Ni1.2%, dilute
Soil 1.1%, remaining is Fe；Described rare earth is made up of following component in percentage terms: yittrium oxide 35%, Gadolinia. 30%, cerium oxide
35%；
Comparative example 3: nodulizer: Mg+Si 16%, Re3.2%, Ca2.4%, Ba2.1%, Ni1.2%, rare earth 1.1%, remaining be Fe；Institute
State rare earth to be made up of following component in percentage terms: yittrium oxide 35%, Gadolinia. 30%, cerium oxide 35%；The percentage by weight of Mg can
The scope of taking is 5.8-6.2%, and the desirable scope of percentage by weight of described Si is 9.8-10.2%；
Comparative example 4: nodulizer: Mg+Si 16%, Re3.2%, Ca2.4%, Ba2.1%, Mn0.05%, Ti0.03%, Ni1.2%, rare earth
1.1%, remaining is Fe；Described rare earth is yittrium oxide；The desirable scope of percentage by weight of Mg is 5.8-6.2%, the weight of described Si
The desirable scope of percentage ratio is 9.8-10.2%；
Nodulizer of the present invention and comparative example nodulizer are administered contrast:
| Oxygen potential % | Remaining magnesium % | Residual Re % | Spheroidal graphite cast-iron tensile strength MPa | Foundry returns proportioning % | |
| The present invention | 97 | 0.058 | 0.0086 | 497.3 | 82 |
| Comparative example 1 | 92 | 0.041 | 0.0054 | 452 | 73 |
| Comparative example 2 | 92 | 0.053 | 0.0074 | 475 | 75 |
| Comparative example 3 | 90 | 0.042 | 0.0062 | 462 | 73 |
| Comparative example 4 | 93 | 0.054 | 0.0061 | 476 | 76 |
Table 1
As can be seen from Table 1, the present invention and the contrast of comparative example 2, it is found that although in comparative example 2 content of magnesium and silicon and
Having reached 16% still, each content is beyond the scope that present invention provide that, under causing the nodulizer performance made significantly for it
Fall, by the contrast of the present invention Yu comparative example 3, it is found that lack some element, the performance of the nodulizer made significantly under
Fall；Being contrasted with comparative example 4 by the present invention, it is found that be used alone the nodulizer that yittrium oxide is made, performance is substantially not as this
Invention；Contrasted with comparative example 1 by the present invention, it is found that the present invention has raising, nodularization greatly to spheroidal graphite cast-iron Oxygen potential
Its remaining magnesium after reaction, residual Re and foundry returns proportioning are all significantly improved, and solve by remaining magnesium and residual Re not enough
Etc. the affected problem of the mechanical property caused, improve nodularization effect and the mechanical performance of spheroidal graphite cast-iron, economic benefit is bright
Aobvious.
Claims (4)
1. a high-performance nodulizer, it is characterised in that be made up of following component by weight percentage, Mg+Si 16%,
Re3.2%, Ca2.4%, Ba2.1%, Mn0.05%, Ti0.03%, Ni1.2%, rare earth 1.1%, remaining is Fe；
In described Mg+Si16%, the desirable scope of percentage by weight of Mg is 5.8-6.2%, the desirable model of percentage by weight of described Si
Enclose for 9.8-10.2%, Mg and Si weight percent content and keep definite value 16%；
Described rare earth is made up of following component in percentage terms: yittrium oxide 35%, Gadolinia. 30%, cerium oxide 35%.
A kind of high-performance nodulizer the most according to claim 1, it is characterised in that the grain of described Nodulizing agent for nodular cast iron
Footpath is 6-8mm.
A kind of high-performance nodulizer the most according to claim 1, it is characterised in that described Nodulizing agent for nodular cast iron uses
Time proportioning press 1.3-1.6 kilogram/add.
4. according to the preparation method of a kind of high-performance nodulizer described in claim 1-3, it is characterised in that made step by following
Suddenly make:
1) raw material is chosen by each element weight percent；
2) by 1) material that takes joins and carries out melting in electric induction furnace；
3) come out of the stove when temperature reaches 1250 DEG C ~ 1350 DEG C, aluminium alloy is poured in the wharve of airtight multilamellar and be cooled to room temperature；
4) by 3) aluminium alloy that cools down is crushed to required particle diameter, is processed into final package packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610357792.7A CN106048125A (en) | 2016-05-26 | 2016-05-26 | High-performance nodulizing agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610357792.7A CN106048125A (en) | 2016-05-26 | 2016-05-26 | High-performance nodulizing agent |
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| CN106048125A true CN106048125A (en) | 2016-10-26 |
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ID=57175329
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610357792.7A Pending CN106048125A (en) | 2016-05-26 | 2016-05-26 | High-performance nodulizing agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877493A (en) * | 2021-01-14 | 2021-06-01 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
| CN112899429A (en) * | 2021-01-14 | 2021-06-04 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100068A (en) * | 1985-04-01 | 1986-07-30 | 清华大学 | Nodulizer for heavy section nodular graphite cast iron and manufacture method thereof |
| CN102560227A (en) * | 2010-12-23 | 2012-07-11 | 龙南龙钇重稀土科技股份有限公司 | Method for producing low-silicon spheroidizing agent by adopting melting distributing and punching composite method |
| CN102717035A (en) * | 2012-07-09 | 2012-10-10 | 江苏多为泵业股份有限公司 | Low Si-Mg ratio and low RE-Mg nodularizer |
| CN102827987A (en) * | 2012-09-24 | 2012-12-19 | 芜湖市金贸流体科技股份有限公司 | Spheroidizing agent as well as production method and usage thereof |
| CN104878277A (en) * | 2015-05-12 | 2015-09-02 | 含山县兴达球墨铸铁厂 | Corrosion-resistant ductile cast iron material for hydraulic wrench piston and preparation method of corrosion-resistant ductile cast iron material |
-
2016
- 2016-05-26 CN CN201610357792.7A patent/CN106048125A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85100068A (en) * | 1985-04-01 | 1986-07-30 | 清华大学 | Nodulizer for heavy section nodular graphite cast iron and manufacture method thereof |
| CN102560227A (en) * | 2010-12-23 | 2012-07-11 | 龙南龙钇重稀土科技股份有限公司 | Method for producing low-silicon spheroidizing agent by adopting melting distributing and punching composite method |
| CN102717035A (en) * | 2012-07-09 | 2012-10-10 | 江苏多为泵业股份有限公司 | Low Si-Mg ratio and low RE-Mg nodularizer |
| CN102827987A (en) * | 2012-09-24 | 2012-12-19 | 芜湖市金贸流体科技股份有限公司 | Spheroidizing agent as well as production method and usage thereof |
| CN104878277A (en) * | 2015-05-12 | 2015-09-02 | 含山县兴达球墨铸铁厂 | Corrosion-resistant ductile cast iron material for hydraulic wrench piston and preparation method of corrosion-resistant ductile cast iron material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877493A (en) * | 2021-01-14 | 2021-06-01 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
| CN112899429A (en) * | 2021-01-14 | 2021-06-04 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
| CN112877493B (en) * | 2021-01-14 | 2023-02-10 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
| CN112899429B (en) * | 2021-01-14 | 2023-03-03 | 内蒙古星晟工程技术有限公司 | Spheroidizing agent and preparation method thereof |
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Application publication date: 20161026 |