CN102002548A - Nodularizer for nodular iron with thick section - Google Patents
Nodularizer for nodular iron with thick section Download PDFInfo
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- CN102002548A CN102002548A CN 201010574995 CN201010574995A CN102002548A CN 102002548 A CN102002548 A CN 102002548A CN 201010574995 CN201010574995 CN 201010574995 CN 201010574995 A CN201010574995 A CN 201010574995A CN 102002548 A CN102002548 A CN 102002548A
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- rare earth
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a nodularizer for nodular iron with a thick section, and belongs to casting alloys. The nodularizer consists of elements of magnesium, silicon, barium, calcium, rare earth, antimony and iron, wherein the rare earth consists of cerium and yttrium; the nodularizer comprises 6 to 10 weight percent of magnesium, 40 to 48 weight percent of silicon, 5 to 6 weight percent of barium and calcium, 3 to 5 weight percent of rare earth, 0.4 to 0.7 weight percent of antimony and the balance of iron; the ratio of antimony to the rare earth is (8-14): 100; the 3 to 5 percent of rare earth contains 1.5 to 2.5 percent of cerium and 1.5 to 2.5 percent of yttrium; and the ratio of antimony to the cerium is (20-40): 100. After the nodularizer is applied, the nodular iron with the thick section can achieve satisfactory nodulizing effect within the curing time of 240 minutes, and the nodularizer particularly can inhibit graphite distortion in the nodular iron with the thick section.
Description
Technical field
The present invention relates to a kind of nodulizing agent, especially belong to a kind of nodulizing agent of handling heavy section ductile iron.
Background technology
The heavy-section ductile iron foundry goods has excellent mechanical property, has economic advantages simultaneously, is the important foundation part of national major technologies and equipment, plays crucial effect in national economy.Along with ductile iron production development of technology and new Application Areas constantly occur, heal and become vigorous in thickness large section ball iron piece market, and its typical case's representative is attached most importance to hundred tonnes and examined spent fuel magnesium iron storage-transport vessel.But because its section is blocked up, make speed of cooling slow, setting time is long, easily at the heavy wall center or the thermal center place occur that graphite morphology (as chunky graphite), decaying spheroidisation, number of graphite ball reduce, defectives such as sphere diameter is thick, graphite floatation, thereby worsen the mechanical property and the use properties of foundry goods.In order to address the above problem, to breed and add technological measures such as trace element and start with and carry out Comprehensive Control from starting material chemical ingredients, nodulizing agent, reinforcement usually.And select suitable nodulizing agent is one of key issue of heavy section ductile iron production.Domestic nodulizing agent commonly used contains a certain amount of rare earth and antimony element usually at present, but the content of rare earth and antimony element is not quite similar, thereby causes nodularization effect instability easily, when wall thickness surpasses 500mm, be unfavorable for controlling graphite morphology, bring difficulty for the production of thickness large section ball iron piece.
At present, produce hundred tonnes of nuclear spent fuel spheroidal graphite cast iron storage-transport vessel foundry goods that heavy-section ductile iron foundry goods, especially wall thickness surpass 500mm, a kind of nodularization effect stability need be provided, can suppress the composite nodulizer of graphite morphology.
Summary of the invention
The object of the present invention is to provide a kind of nodulizing agent that is applicable to heavy section ductile iron, this nodulizing agent can significantly suppress the formation of graphite morphology in the heavy section ductile iron.
The object of the present invention is achieved like this:
A kind of heavy section ductile iron nodulizing agent is made up of magnesium, silicon, barium, calcium, rare earth, antimony and ferro element, and its middle-weight rare earths is made up of cerium, yttrium, and the shared weight percent of each element is magnesium 6-10%; Silicon 40-48%; Barium+calcium 5-6%; Rare earth 3-5%; Antimony 0.4-0.7%, surplus is iron, wherein antimony: rare earth=(8-14): 100, (3-5%) contain (1.5-2.5%) cerium and (1.5-2.5%) yttrium in the rare earth, antimony: cerium=(20-40): 100.
Advantage of the present invention is that nodularization is effective, the purifying molten iron effect is strong, help improving the comprehensive mechanical performance of ductile cast iron casting, can obtain satisfied nodularization effect on the heavy section ductile iron casting of setting time in 240min the time, especially can suppress the formation of graphite morphology in the heavy-section ductile iron.
Embodiment
Give an actual example below and describe the present invention.
1: experiment material
(1) nodulizing agent: its by weight percentage component be: magnesium 8.28%; Silicon 43.67%; Barium+calcium 5.4%, wherein barium 2.3%, calcium 3.1%; Rare earth 3.14%; Antimony 0.53%, surplus are iron.Contain cerium 1.57% and yttrium 1.57% in 3.14% rare earth.
(2) pig iron: Benxi pig iron, chemical ingredients is: carbon 4.2%; Silicon 0.87%; Manganese 0.046%; Phosphorus＜0.04%; Sulphur＜0.03%.
(3) highquality carbon steel: carbon 0.17%; Silicon 0.22%; Manganese 0.53%; Phosphorus＜0.012%; Sulphur＜0.02%.
2 processing steps:
Carry out melting in the basic electric furnace; The molten iron tapping temperature is 1500-1520 ℃; Employing is poured method and is carried out spheroidizing, and temperature is controlled at 1450-1480 ℃; 75 ferrosilicon inoculation.Molten iron casting wall thickness after the spheroidizing is the fan-shaped test block of 500mm.
3 experimental results:
Graphite is spherical in the fan-shaped test block tissue, has avoided the appearance of chunky graphite, and matrix almost all is a ferrite.Tensile strength, yield strength, unit elongation, impelling strength during test block final set position-40 ℃ are respectively 418MPa, 293MPa, 9% and 9.5J/cm
2
Claims (1)
1. a heavy section ductile iron nodulizing agent is made up of magnesium, silicon, barium, calcium, rare earth, antimony and ferro element, and its middle-weight rare earths is made up of cerium, yttrium, and the shared weight percent of each element is magnesium 6-10%; Silicon 40-48%; Barium+calcium 5-6%; Rare earth 3-5%; Antimony 0.4-0.7%, surplus is an iron, it is characterized in that antimony: rare earth=(8-14): 100, (3-5%) contain (1.5-2.5%) cerium and (1.5-2.5%) yttrium in the rare earth, antimony: cerium=(20-40): 100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010574995 CN102002548A (en) | 2010-12-07 | 2010-12-07 | Nodularizer for nodular iron with thick section |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010574995 CN102002548A (en) | 2010-12-07 | 2010-12-07 | Nodularizer for nodular iron with thick section |
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| CN102002548A true CN102002548A (en) | 2011-04-06 |
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| CN 201010574995 Pending CN102002548A (en) | 2010-12-07 | 2010-12-07 | Nodularizer for nodular iron with thick section |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102925615A (en) * | 2012-11-26 | 2013-02-13 | 哈尔滨理工大学 | Long-acting anti-recession nodulizer for thick large-section ductile iron |
| CN103194562A (en) * | 2013-04-03 | 2013-07-10 | 山东汇丰铸造科技股份有限公司 | Nodulizing agent for nodular cast iron and preparation method of nodulizing agent |
| CN104812922A (en) * | 2012-11-14 | 2015-07-29 | 菲赫贝姆简化股份公司 | Inoculant alloy for thick cast-iron parts |
| 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 |
| WO2019132671A1 (en) * | 2017-12-29 | 2019-07-04 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| CN110760739A (en) * | 2018-07-26 | 2020-02-07 | 江苏锡华铸造有限公司 | Preparation method of solid solution strengthened ferritic nodular cast iron for thick and large parts |
| CN111321266A (en) * | 2020-04-28 | 2020-06-23 | 含山县朝霞铸造有限公司 | Spheroidizing inoculation process for nodular cast iron |
| RU2772149C2 (en) * | 2017-12-29 | 2022-05-18 | Элкем Аса | Cast iron modifier and method for producing the cast iron modifier |
| US11479828B2 (en) | 2017-12-29 | 2022-10-25 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| US11486012B2 (en) | 2017-12-29 | 2022-11-01 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| US11486011B2 (en) | 2017-12-29 | 2022-11-01 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| US11932913B2 (en) | 2017-12-29 | 2024-03-19 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427086A (en) * | 2001-12-21 | 2003-07-02 | 包头文鑫实业有限公司 | High efficiency environmental protection nodulizer and its preparation method |
| CN1687464A (en) * | 2005-03-31 | 2005-10-26 | 龙南县龙钇重稀土材料有限责任公司 | Composite nodulizer of yttrium based heavy rare earths magnesium |
-
2010
- 2010-12-07 CN CN 201010574995 patent/CN102002548A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1427086A (en) * | 2001-12-21 | 2003-07-02 | 包头文鑫实业有限公司 | High efficiency environmental protection nodulizer and its preparation method |
| CN1687464A (en) * | 2005-03-31 | 2005-10-26 | 龙南县龙钇重稀土材料有限责任公司 | Composite nodulizer of yttrium based heavy rare earths magnesium |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717035B (en) * | 2012-07-09 | 2014-03-26 | 江苏多为泵业股份有限公司 | Low Si-Mg ratio and low RE-Mg nodularizer |
| 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 |
| CN104812922A (en) * | 2012-11-14 | 2015-07-29 | 菲赫贝姆简化股份公司 | Inoculant alloy for thick cast-iron parts |
| EP2920335B1 (en) * | 2012-11-14 | 2019-12-18 | Ferropem | Inoculant alloy for thick cast-iron parts |
| CN102925615A (en) * | 2012-11-26 | 2013-02-13 | 哈尔滨理工大学 | Long-acting anti-recession nodulizer for thick large-section ductile iron |
| CN103194562B (en) * | 2013-04-03 | 2014-11-12 | 山东汇丰铸造科技股份有限公司 | Nodulizing agent for nodular cast iron and preparation method of nodulizing agent |
| CN103194562A (en) * | 2013-04-03 | 2013-07-10 | 山东汇丰铸造科技股份有限公司 | Nodulizing agent for nodular cast iron and preparation method of nodulizing agent |
| WO2019132671A1 (en) * | 2017-12-29 | 2019-07-04 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| RU2772149C2 (en) * | 2017-12-29 | 2022-05-18 | Элкем Аса | Cast iron modifier and method for producing the cast iron modifier |
| US11479828B2 (en) | 2017-12-29 | 2022-10-25 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| US11486012B2 (en) | 2017-12-29 | 2022-11-01 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| US11486011B2 (en) | 2017-12-29 | 2022-11-01 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| US11708618B2 (en) | 2017-12-29 | 2023-07-25 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| US11932913B2 (en) | 2017-12-29 | 2024-03-19 | Elkem Asa | Cast iron inoculant and method for production of cast iron inoculant |
| 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 |
| CN110760739A (en) * | 2018-07-26 | 2020-02-07 | 江苏锡华铸造有限公司 | Preparation method of solid solution strengthened ferritic nodular cast iron for thick and large parts |
| CN111321266A (en) * | 2020-04-28 | 2020-06-23 | 含山县朝霞铸造有限公司 | Spheroidizing inoculation process for nodular cast iron |
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Open date: 20110406 |