CN101775457A - Yttrium rare earth magnesium composite nodulizer - Google Patents
Yttrium rare earth magnesium composite nodulizer Download PDFInfo
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- CN101775457A CN101775457A CN201010101204A CN201010101204A CN101775457A CN 101775457 A CN101775457 A CN 101775457A CN 201010101204 A CN201010101204 A CN 201010101204A CN 201010101204 A CN201010101204 A CN 201010101204A CN 101775457 A CN101775457 A CN 101775457A
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- rare earth
- yttrium
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- earth magnesium
- composite nodulizer
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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 an yttrium rare earth magnesium composite nodulizer, which comprises the following components in percentage by weight: 35-55% of Si, 4.5-10% of Mg, 0.05-1.2% of Y, 0-1.0% of Bi, 0-5% of Sb, 0.5-5% of Ca, 0-5% of Ba and the balance of Fe and a small number of impurity elements. The yttrium rare earth magnesium composite nodulizer takes yttrium iron alloy as a source of yttrium, and a mix-melting method is adopted in a medium-frequency induction furnace to produce the yttrium rare earth magnesium composite nodulizer. Years of researches and application practices prove that the yttrium rare earth magnesium composite nodulizer produced by the yttrium iron alloy can completely solve the problems of spheroidalization decaying, graphite degeneration and the like in the process of producing nodular cast iron with a thick and large cross section under different conditions and solves the phenomenon of 'sandwich' of inhomogenous structure property of the nodular cast iron with the thick and large cross section. Because the rare earth contains yttrium and does not contain any other rare earth elements, the rare earth element is single without mutual interference of rare earth elements, and the spheroidalization decaying resisting capacity is strong.
Description
Technical field
The present invention relates to the ferroalloy smelting field, especially a kind of Yttrium rare earth magnesium composite nodulizer.
Technical background
Supply contains Yttrium rare earth magnesium composite nodulizer in the market, contain yttrium, cerium, lanthanum and other rare earth element in its rare earth composition, can do sorrow mutually between rare earth element, a little less than the anti-decaying spheroidisation ability, the yttrium oxygen sulfur compound density that forms after the nodularization is than lanthanum cerium oxygen sulfur compound density height, the magnesium iron middle-weight rare earths is mingled with residual many, the large-section magnesium iron poor performance of production, and quality is low.
Summary of the invention
Purpose of the present invention just provide a kind of do not have between rare earth element mutually do sorrow, anti-decaying spheroidisation ability is strong, can improve the Yttrium rare earth magnesium composite nodulizer of the bulk properties of heavy-section ductile iron.
Yttrium rare earth magnesium composite nodulizer component of the present invention is (by weight percentage): Si 35-55%, Mg4.5-10%, Y 0.05-1.2%, Bi 0-1.0%, Sb 0-5%, Ca 0.5-5%, Ba0-5%, all the other are iron and small amount of impurities element.
Yttrium rare earth magnesium composite nodulizer of the present invention, (weight percent Y 50-80% Yu Weitie) as the source of yttrium, adopts mix-melting method to produce Yttrium rare earth magnesium composite nodulizer in medium-frequency induction furnace to adopt the yttrium iron alloy, nodulizing agent is shaped as irregular bulk, and density is 3.5-5.5g/cm
3, melting range is 1000-1350 ℃.
Prove by years of researches and application practice, use the Yttrium rare earth magnesium composite nodulizer of yttrium iron alloy production, complete Neng Gou Solution heavy section ductile iron structure property inhomogenous " Sanming City smelting " phenomenon of having determined such as the problem ， Solution that produces the decaying spheroidisation that occurs in the heavy section ductile iron process, graphite morphology under the various different conditions of determining.Because its rare earth composition is a yttrium, do not contain other any rare earth element, the rare earth composition is single, there is not the mutually dried sorrow between rare earth element, anti-decaying spheroidisation ability is strong, and the yttrium oxygen sulfur compound density that forms after the nodularization is than low, the easy come-up of lanthanum cerium oxygen sulfur compound density, and the magnesium iron middle-weight rare earths is mingled with residual few, the large-section magnesium iron performance of producing is good, the quality height.
Embodiment
A kind of Yttrium rare earth magnesium nodulizing agent, component (by weight percentage): Y1.0%, Mg7.0%, Si 44%, Fe surplus.
Raw material composition (by weight percentage) yttrium iron alloy: Y 70%, Fe surplus, ferrosilicon: Si75%, Al1.0%, Fe surplus, MAGNESIUM METAL: Mg99.9%, the pig iron: C 4.06%, Si 1.32%, Mn 0.33%, P 0.07%, S 0.04%.
Press above various raw material specification batching 500Kg: yttrium iron alloy 7.14Kg, ferrosilicon 293.3Kg, MAGNESIUM METAL 35Kg, pig iron 164.56Kg.Add melting in one ton the medium-frequency induction furnace, pour into the metal pattern moulding, the sample examination result is Y 0.97%, Mg 6.75%, Si 44.3%, Fe surplus, and the Yttrium rare earth magnesium nodulizing agent that makes reaches specification of quality fully.
The application of above-mentioned Yttrium rare earth magnesium nodulizing agent:
1, the magnesium iron trade mark: QT450-10; Matrix is: ferrite+perlite
2, experiment starting material:
(1) Yttrium rare earth magnesium nodulizing agent: component is (pressing mass percent) Y1.0%, Mg7.0%, Si44%, Fe surplus.
(2) nucleating agent: Qinghai San Chuan ferrosilicon (trade mark FeSi75Al1.5A), granularity 0.5-2mm.
(3) pig iron: Anyang pig iron, chemical ingredients is: C 4.06%Si 1.32%Mn 0.33%P 0.07%S 0.04%.
3, processing step:
(1) 50Kg medium-frequency induction furnace fusing 40Kg molten iron; (2) the molten iron tapping temperature is that 1500～1520 ℃ of (3) dykes and dams nodularization bags carry out spheroidizing, 1450～1480 ℃ of nodularization temperature; (4) 75 ferrosilicon and silicon barium calcium nucleating agent once with twice inoculation; (5) molten iron after the spheroidizing is poured in the good plumbago crucible of preheating; (6) 1250 ℃ of insulations 180 minutes; (7) in insulating process, get Φ 20 * 60 metallographics every 30min.
4, experimental result:
The nodularization effect:
5min (after the nodularization): 2 grades of nodulizing grades, graphite pebbles is many and tiny.Size 6-7 level.
30min: 2 grades of nodulizing grades, 6 grades of sizes.
60min: 2 grades of nodulizing grades, 6 grades of sizes.
90min: 3 grades of nodulizing grades, 6 grades of sizes.
120min: nodulizing grade 2-3 level, 6 grades of sizes.
150min: 2 grades of nodulizing grades, 6 grades of sizes.
180min: 2 grades of nodulizing grades, 6 grades of sizes, the graphite pebbles rounding is better, but graphite pebbles is few than the 5min sample.
Mechanical property: 0min: tensile strength 488N/mm
2Unit elongation 14%
150min: tensile strength 495N/mm
2Unit elongation 12%.
Producer's application example:
Domestic certain spheroidal graphite cast iron manufactory adopts Yttrium rare earth magnesium nodulizing agent of the present invention successfully to produce heavy duty machine tools housing (maximum section 450mm) in the process of exploitation world market, has become the qualified supplier of heavy duty machine tools shell casting at present.
1) the nodulizing agent composition is: Y 2.8%, and Mg 7.0%, and Ca 2.0%, and Ba 2.0%, and Si 44%, and Bi 0.05%, the Fe surplus.
2) analyzing and testing result:
A) matrix is F, and nodulizing grade is: ASTM I-II level.
B) the chemical ingredients mechanical property of the attached casting test block of part
| Part No. | ??C | ??Si | Tensile strength | Yield strength | Unit elongation |
| ??27634 | ??3.12 | ??2.47 | ??445 | ??300 | ??25 |
| ??29635 | ??3.2 | ??2.36 | ??475 | ??280 | ??18 |
| ??29628 | ??3.22 | ??2.41 | ??455 | ??280 | ??24 |
| ??29632 | ??3.19 | ??2.52 | ??445 | ??290 | ??18 |
| ??30236 | ??3.22 | ??2.33 | ??487 | ??299 | ??19 |
3) standard for acceptance (client's code requirement): A395 (ASTM), i.e. ferrite ductile cast iron, and disjunctor test block checking must be arranged, promptly tensile strength is greater than 418N/mm
2, yield strength is greater than 275N/mm
2, unit elongation is greater than 18%.HBS140-180, the matrix ferrite is greater than 90%; Foundry goods will carry out 100% dimensional inspection; Visual inspection, and magnetic (MT) ultrasonic wave (UT) and 100% transmission of radiation (RT) nondestructive test, every RT supply of material standard is E186 (an ASTM standard).
Produce detected result and meet inspecting standard.
Claims (1)
1. Yttrium rare earth magnesium composite nodulizer, it is characterized in that: its component is (by weight percentage): Si35-55%, Mg 4.5-10%, Y 0.05-1.2%, Bi 0-1.0%, Sb 0-5%, Ca0.5-5%, Ba 0-5%, and all the other are iron and small amount of impurities element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010101204A CN101775457A (en) | 2010-01-26 | 2010-01-26 | Yttrium rare earth magnesium composite nodulizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010101204A CN101775457A (en) | 2010-01-26 | 2010-01-26 | Yttrium rare earth magnesium composite nodulizer |
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| Publication Number | Publication Date |
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| CN101775457A true CN101775457A (en) | 2010-07-14 |
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| CN201010101204A Pending CN101775457A (en) | 2010-01-26 | 2010-01-26 | Yttrium rare earth magnesium composite nodulizer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105087847A (en) * | 2014-05-09 | 2015-11-25 | 镇江忆诺唯记忆合金有限公司 | Synthetic cast iron technology for producing high-strength grey cast iron |
| CN105316562A (en) * | 2014-08-04 | 2016-02-10 | 陆丰市东煊实业有限公司 | Method for preparing steel additives through waste rare earth materials |
| CN107326139A (en) * | 2017-06-27 | 2017-11-07 | 苏州楚博生物技术有限公司 | A kind of rare earth magnesium nodularizer |
| CN107619898A (en) * | 2017-08-31 | 2018-01-23 | 安徽信息工程学院 | Thickness large section ball iron piece nodulizer and preparation method thereof |
-
2010
- 2010-01-26 CN CN201010101204A patent/CN101775457A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102827987B (en) * | 2012-09-24 | 2016-03-30 | 芜湖市金贸流体科技股份有限公司 | Nodulizing agent and production method thereof and purposes |
| CN105087847A (en) * | 2014-05-09 | 2015-11-25 | 镇江忆诺唯记忆合金有限公司 | Synthetic cast iron technology for producing high-strength grey cast iron |
| CN105316562A (en) * | 2014-08-04 | 2016-02-10 | 陆丰市东煊实业有限公司 | Method for preparing steel additives through waste rare earth materials |
| CN105316562B (en) * | 2014-08-04 | 2018-01-23 | 陆丰市东煊实业有限公司 | A kind of method that steel additive agent is prepared using rare earth waste |
| CN107326139A (en) * | 2017-06-27 | 2017-11-07 | 苏州楚博生物技术有限公司 | A kind of rare earth magnesium nodularizer |
| CN107326139B (en) * | 2017-06-27 | 2019-08-02 | 苏州楚博生物技术有限公司 | A kind of rare earth magnesium nodularizer |
| CN107619898A (en) * | 2017-08-31 | 2018-01-23 | 安徽信息工程学院 | Thickness large section ball iron piece nodulizer and preparation method thereof |
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Open date: 20100714 |