CN102965567B - Casting thick large-section pearlite nodular cast iron and casting method thereof - Google Patents
Casting thick large-section pearlite nodular cast iron and casting method thereof Download PDFInfo
- Publication number
- CN102965567B CN102965567B CN201210477633.2A CN201210477633A CN102965567B CN 102965567 B CN102965567 B CN 102965567B CN 201210477633 A CN201210477633 A CN 201210477633A CN 102965567 B CN102965567 B CN 102965567B
- Authority
- CN
- China
- Prior art keywords
- iron
- inoculation
- pearlite
- nodulizing agent
- agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses casting thick large-section pearlite nodular cast iron and a casting method thereof. The nodular cast iron comprises the following components in percentage by weight: 3.4%-3.7% of C, 2.1%-2.6% of Si, 0.4%-0.8% of Mn, at most 0.04% of P, at most 0.02% of S, 0.03%-0.05% of Mg, 0.4%-1.0% of Cu, 0.01%-0.02% of Sb, 0.01%-0.03% of rare earth, other microelement the total content of which is at most 0.1%, and the balance of iron. The casting method comprises the following traditional technology steps: blending, smelting, balling treatment, inoculation treatment and pouring. As for the casting thick large-section pearlite nodular cast iron, the tensile strength is more than or equal to 592MPa, the yield strength is more than or equal to 357MPa, the specific elongation is more than or equal to 4%, Brinell hardness is HB224-HB240, the pearlite content is more than or equal to 85%, and the casting thick large-section pearlite nodular cast iron has a favorable mechanic property.
Description
Technical field
The present invention relates to a kind of spheroidal graphite cast iron, is specifically a kind of as cast condition thick and large section pearlite ductile iron and castmethod thereof.
Background technology
Heavy section ductile iron refers to that wall thickness is more than or equal to the spheroidal graphite cast iron of 100mm, and pearlite ductile iron refers to that matrix Medium pearlite accounts for more than 80% spheroidal graphite cast iron, and pearlite ductile iron, with its good performance, is widely used in machine building industry.Producing at present thick and large section pearlite ductile iron need to obtain by later stage thermal treatment mostly, minority adopts the method for producing thick and large section pearlite ductile iron under as cast condition, desired raw material kind is more, processing step relative complex, production cost is high, production efficiency is low, and the spheroidal graphite cast iron mechanical property of simultaneously producing is undesirable.
Summary of the invention
A technical problem to be solved by this invention is to overcome above the deficiencies in the prior art: provide that a kind of desired raw material kind is few, the low as cast condition thick and large section pearlite ductile iron that has again excellent mechanical performances of production cost.
A technical solution of the present invention is as follows:
A kind of as cast condition thick and large section pearlite ductile iron, contain iron, carbon, silicon, manganese, phosphorus, sulphur, magnesium, copper, antimony, rare earth and other trace elements, the weight percent of each component is: carbon 3.4%～3.7%, silicon 2.1%～2.6%, manganese 0.4%～0.8%, phosphorus≤0.04%, sulphur≤0.02%, magnesium 0.03%～0.05%, copper 0.4%～1.0%, antimony 0.01%～0.02%, rare earth 0.01%～0.03% and other micronutrient levels summation≤0.1%, surplus are iron.
Another technical problem that the present invention will solve is to overcome above the deficiencies in the prior art: the castmethod that the as cast condition thick and large section pearlite ductile iron that a kind of technique is simple, production efficiency is high is provided.
Another technical solution of the present invention is as follows:
A castmethod for as cast condition thick and large section pearlite ductile iron, comprises following conventional process: batching, melting, spheroidizing, inoculation, cast; Adopting the pig iron, foundry returns, steel scrap, ferrosilicon, ferromanganese, electrolytic copper, antimony slab is raw material, through batching, adopts cupola furnace-electric furnace duplex to carry out melting, then by melted molten iron process spheroidizing, the cast of tapping a blast furnace after inoculation; Wherein adopt and pour method spheroidizing, the nodulizing agent of employing is yttrium-base heavy rare earth nodulizing agent and light rare earths nodulizing agent mixture, and wherein in mixture, light rare earths nodulizing agent accounts for 60%～80%, and all the other are yttrium-base heavy rare earth nodulizing agent; Inoculation adopts that iron notch breeds, current-following inoculation and mould cavity inoculation combine, and wherein, iron notch breeds and adopts silicon barium calcium nucleating agent; Current-following inoculation adopts silicon barium calcium nucleating agent; Mould cavity inoculation adopts 75 ferrosilicon nucleating agents; The add-on of nodulizing agent and nucleating agent is by determine base iron composition and target hot metal composition COMPREHENSIVE CALCULATING, and before tapping a blast furnace, keeping iron liquid temp is at 1500 ℃ ~ 1520 ℃ standing 10 ~ 30 minutes, and finally teeming temperature is controlled at 1290 ℃ ~ 1320 ℃.
The invention has the beneficial effects as follows: the as cast condition thick and large section pearlite ductile iron of producing by castmethod of the present invention, under as cast condition, according to GB/T 228.1-2010 and GB/T 231.1-2009, record tensile strength >=592MPa, yield strength >=357 MPa, unit elongation >=4%, Brinell hardness HB224 ~ HB240; According to GB/T 9441-2009, recording foundry goods centre metallographic structure matrix is perlite >=85%, 5 ~ 6 grades of graphite sizes, and 2 ~ 3 grades of nodulizing grades, have good mechanical property; Adopt as cast condition to produce pearlite ductile iron simultaneously, can save cost, enhance productivity, to increasing economic efficiency, have very important significance.
Embodiment
Below by embodiment, the present invention is described in further details, but the present invention is not only confined to following specific embodiment.
Embodiment mono-
The as cast condition thick and large section pearlite ductile iron target foundry goods that production casting dimension is 300mm * 300mm * 500mm; Wherein the weight percent of each component of as cast condition thick and large section pearlite ductile iron target foundry goods is: carbon 3.58%, silicon 2.43%, manganese 0.65%, phosphorus 0.03%, sulphur 0.015%, magnesium 0.04%, copper 0.4%, antimony 0.016%, rare earth 0.03% and other micronutrient levels summation≤0.1%, surplus are iron.
Adopting the pig iron, foundry returns, steel scrap, ferrosilicon, ferromanganese, electrolytic copper, antimony slab is raw material, above-mentioned raw materials is prepared burden according to given target foundry goods component, adopt cupola furnace-electric furnace duplex to carry out melting, then by melted molten iron process spheroidizing, the cast of tapping a blast furnace after inoculation; Selecting yttrium-base heavy rare earth nodulizing agent and light rare earths nodulizing agent mixture is nodulizing agent, and in mixture, light rare earths nodulizing agent accounts for 65%, and all the other are yttrium-base heavy rare earth nodulizing agent; Iron notch breeds selects silicon barium calcium nucleating agent; Current-following inoculation is selected silicon barium calcium nucleating agent; Mould cavity inoculation adopts 75 ferrosilicon nucleating agents; The add-on of nodulizing agent and nucleating agent is by determine base iron composition and target hot metal composition COMPREHENSIVE CALCULATING, keeps iron liquid under 1510 ℃ of high temperature standing 10 minutes before tapping a blast furnace, and final teeming temperature is controlled at 1304 ℃, pours into a mould cooling forming.
The iron block of getting gained 300mm * 300mm * 500mm foundry goods centre bit and be a 300mm * 300mm * 20m of 250mm place cutting carries out mechanical property detection.
The as-cast characteristic that records above-mentioned foundry goods according to GB/T 228.1-2010 and GB/T 231.1-2009 is: tensile strength is 592MPa, and yield strength is 357MPa, and unit elongation is 4%, and Brinell hardness is HB224; According to GB/T 9441-2009, recording foundry goods metallographic structure matrix is perlite 85%, 5 grades of graphite sizes, 3 grades of nodulizing grades.
Embodiment bis-
The as cast condition thick and large section pearlite ductile iron target foundry goods that production casting dimension is 250mm * 250mm * 500mm; Wherein the weight percent of each component of as cast condition thick and large section pearlite ductile iron target foundry goods is: carbon 3.6%, silicon 2.1%, manganese 0.8%, phosphorus 0.03%, sulphur 0.02%, magnesium 0.05%, copper 0.8%, antimony 0.02%, rare earth 0.03% and other micronutrient levels summation≤0.1%, surplus are iron.
Adopting the pig iron, foundry returns, steel scrap, ferrosilicon, ferromanganese, electrolytic copper, antimony slab is raw material, above-mentioned raw materials is prepared burden according to given target foundry goods component, adopt cupola furnace-electric furnace duplex to carry out melting, then by melted molten iron process spheroidizing, the cast of tapping a blast furnace after inoculation; Selecting yttrium-base heavy rare earth nodulizing agent and light rare earths nodulizing agent mixture is nodulizing agent, and in mixture, light rare earths nodulizing agent accounts for 70%, and all the other are yttrium-base heavy rare earth nodulizing agent; Iron notch breeds selects silicon barium calcium nucleating agent; Current-following inoculation is selected silicon barium calcium nucleating agent; Mould cavity inoculation adopts 75 ferrosilicon nucleating agents; The add-on of nodulizing agent and nucleating agent is by determine base iron composition and target hot metal composition COMPREHENSIVE CALCULATING, keeps iron liquid under 1520 ℃ of high temperature standing 15 minutes before tapping a blast furnace, and final teeming temperature is controlled at 1300 ℃, pours into a mould cooling forming.
The iron block of getting gained 250mm * 250mm * 500mm foundry goods centre bit and be a 250mm * 250mm * 20m of 250mm place cutting carries out mechanical property detection.
The as-cast characteristic that records above-mentioned foundry goods according to GB/T 228.1-2010 and GB/T 231.1-2009 is: tensile strength is 600MPa, and yield strength is 360MPa, and unit elongation is 4%, and Brinell hardness is HB230; According to GB/T 9441-2009, recording foundry goods metallographic structure matrix is perlite 90%, 5 grades of graphite sizes, 2 grades of nodulizing grades.
Embodiment tri-
The as cast condition thick and large section pearlite ductile iron target foundry goods that production casting dimension is 200mm * 200mm * 500mm; Wherein the weight percent of each component of as cast condition thick and large section pearlite ductile iron target foundry goods is: carbon 3.7%, silicon 2.6%, manganese 0.7%, phosphorus 0.03%, sulphur 0.01%, magnesium 0.03%, copper 0.7%, antimony 0.02%, rare earth 0.03% and other micronutrient levels summation≤0.1%, surplus are iron.
Adopting the pig iron, foundry returns, steel scrap, ferrosilicon, ferromanganese, electrolytic copper, antimony slab is raw material, above-mentioned raw materials is prepared burden according to given target foundry goods component, adopt cupola furnace-electric furnace duplex to carry out melting, then by melted molten iron process spheroidizing, the cast of tapping a blast furnace after inoculation; Selecting yttrium-base heavy rare earth nodulizing agent and light rare earths nodulizing agent mixture is nodulizing agent, and in mixture, light rare earths nodulizing agent accounts for 70%, and all the other are yttrium-base heavy rare earth nodulizing agent; Iron notch breeds selects silicon barium calcium nucleating agent; Current-following inoculation is selected silicon barium calcium nucleating agent; Mould cavity inoculation adopts 75 ferrosilicon nucleating agents; The add-on of nodulizing agent and nucleating agent is by determine base iron composition and target hot metal composition COMPREHENSIVE CALCULATING, keeps iron liquid under 1520 ℃ of high temperature standing 15 minutes before tapping a blast furnace, and final teeming temperature is controlled at 1300 ℃, pours into a mould cooling forming.
The iron block of getting gained 200mm * 200mm * 500mm foundry goods centre bit and be a 200mm * 200mm * 20m of 250mm place cutting carries out mechanical property detection.
The as-cast characteristic that records above-mentioned foundry goods according to GB/T 228.1-2010 and GB/T 231.1-2009 is: tensile strength is 620MPa, and yield strength is 380MPa, and unit elongation is 3%, and Brinell hardness is HB226; According to GB/T 9441-2009, recording foundry goods metallographic structure matrix is perlite 95%, 6 grades of graphite sizes, 3 grades of nodulizing grades.
Claims (1)
1. an as cast condition thick and large section pearlite ductile iron, is characterized in that: it is comprised of the component of following weight percent:
Carbon 3.6%, silicon 2.1%, manganese 0.8%, phosphorus 0.03%, sulphur 0.02%, magnesium 0.05%, copper 0.8%, antimony 0.02%, rare earth 0.03% and other micronutrient levels summation≤0.1%, surplus are iron;
The castmethod of described as cast condition thick and large section pearlite ductile iron is: adopting the pig iron, foundry returns, steel scrap, ferrosilicon, ferromanganese, electrolytic copper, antimony slab is raw material, through batching, adopt cupola furnace-electric furnace duplex to carry out melting, again by melted molten iron process spheroidizing, the cast of tapping a blast furnace after inoculation; Wherein adopt and pour method spheroidizing, the nodulizing agent of employing is yttrium-base heavy rare earth nodulizing agent and light rare earths nodulizing agent mixture, and wherein in mixture, light rare earths nodulizing agent accounts for 60%～80%, and all the other are yttrium-base heavy rare earth nodulizing agent; Inoculation adopts that iron notch breeds, current-following inoculation and mould cavity inoculation combine, and wherein, iron notch breeds and adopts silicon barium calcium nucleating agent; Current-following inoculation adopts silicon barium calcium nucleating agent; Mould cavity inoculation adopts 75 ferrosilicon nucleating agents; The add-on of nodulizing agent and nucleating agent is by determine base iron composition and target hot metal composition COMPREHENSIVE CALCULATING, and before tapping a blast furnace, keeping iron liquid temp is at 1500 ℃～1520 ℃ standing 10～30 minutes, and finally teeming temperature is controlled at 1290 ℃～1320 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210477633.2A CN102965567B (en) | 2012-11-22 | 2012-11-22 | Casting thick large-section pearlite nodular cast iron and casting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210477633.2A CN102965567B (en) | 2012-11-22 | 2012-11-22 | Casting thick large-section pearlite nodular cast iron and casting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102965567A CN102965567A (en) | 2013-03-13 |
| CN102965567B true CN102965567B (en) | 2014-08-06 |
Family
ID=47796002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210477633.2A Active CN102965567B (en) | 2012-11-22 | 2012-11-22 | Casting thick large-section pearlite nodular cast iron and casting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102965567B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109536824A (en) * | 2018-11-21 | 2019-03-29 | 兰州兰石能源装备工程研究院有限公司 | A kind of tough as cast condition QT700-10 of high strength and low cost and preparation method thereof |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103290299B (en) * | 2013-05-31 | 2015-05-20 | 西华大学 | Vanadium-titanium nodular cast iron smelting method |
| CN103290300B (en) * | 2013-06-18 | 2015-02-18 | 日月重工股份有限公司 | Casting method of thick large section ferrite nodular cast iron |
| CN103484754B (en) * | 2013-08-27 | 2015-08-12 | 日月重工股份有限公司 | The production method of spheroidal graphite cast iron for planet carrier |
| CN103614612B (en) * | 2013-12-06 | 2015-07-01 | 郑州机械研究所 | Manufacturing method for high-strength low stress cast nodular cast iron with high elasticity modulus |
| CN103757528A (en) * | 2013-12-31 | 2014-04-30 | 芜湖诚拓汽车零部件有限公司 | Nodular cast iron material |
| CN104195421A (en) * | 2014-08-14 | 2014-12-10 | 芜湖国鼎机械制造有限公司 | Large-section nodular cast iron and cast parts and preparation method thereof |
| CN104195422A (en) * | 2014-08-14 | 2014-12-10 | 芜湖国鼎机械制造有限公司 | Large-section nodular cast iron and cast parts and preparation method thereof |
| CN104195423B (en) * | 2014-09-24 | 2016-09-07 | 山东宏马工程机械有限公司 | The low silicon of high-carbon is containing niobium cast iron brake disk and preparation method thereof |
| CN105349878B (en) * | 2015-11-06 | 2017-05-24 | 河南理工大学 | Antimony-bearing spheroidal graphite cast iron and production method thereof |
| CN105671414B (en) * | 2016-04-06 | 2018-06-19 | 欧玛(中国)汽车部件有限公司 | Half-bridge replaces full-bridge to drive the spheroidal graphite cast-iron and its production method on agricultural machine |
| CN105695856A (en) * | 2016-04-06 | 2016-06-22 | 欧玛(中国)汽车部件有限公司 | Nodular cast iron for high-toughness driving axle housing of high-end load-bearing forklift and production method thereof |
| CN105671419A (en) * | 2016-04-06 | 2016-06-15 | 欧玛(中国)汽车部件有限公司 | Nodular cast iron for half-bridge axle housing of heavy high-power agricultural machinery and production method thereof |
| CN106011602B (en) * | 2016-08-03 | 2018-01-09 | 日月重工股份有限公司 | Marine diesel body spheroidal graphite cast-iron and preparation method thereof |
| CN108796355A (en) * | 2018-07-06 | 2018-11-13 | 东风精密铸造有限公司 | A kind of precision-investment casting as-cast ball iron QT800-5 production methods |
| CN108977725A (en) * | 2018-08-09 | 2018-12-11 | 常州钜苓铸造有限公司 | High-performance cast pearlite ductile iron and its production method |
| CN108950371A (en) * | 2018-08-09 | 2018-12-07 | 常州钜苓铸造有限公司 | High-performance nodular cast iron and its production method |
| CN114058936A (en) * | 2021-10-22 | 2022-02-18 | 一汽解放汽车有限公司 | Nodular cast iron and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101407884A (en) * | 2008-10-24 | 2009-04-15 | 常州卓润风能设备有限公司 | Smelting technique for cast of wind energy apparatus |
| CN102127673A (en) * | 2010-01-12 | 2011-07-20 | 宝山钢铁股份有限公司 | High-strength spheroidal graphite cast iron for thick-walled casting die |
| CN101982554A (en) * | 2010-08-30 | 2011-03-02 | 浙江太阳股份有限公司 | Copper-antimony alloy spheroidal graphite cast iron material for crank shafts and preparation method thereof |
-
2012
- 2012-11-22 CN CN201210477633.2A patent/CN102965567B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109536824A (en) * | 2018-11-21 | 2019-03-29 | 兰州兰石能源装备工程研究院有限公司 | A kind of tough as cast condition QT700-10 of high strength and low cost and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102965567A (en) | 2013-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102965567B (en) | Casting thick large-section pearlite nodular cast iron and casting method thereof | |
| CN103981434B (en) | A kind of preparation method of high tough spheroidal graphite cast iron | |
| CN105063467B (en) | A kind of control method of big cross section silicon solution strengthening ferrite ductile cast iron center portion graphite form | |
| CN104120332B (en) | High-intensity high-tenacity spheroidal graphite cast-iron 600-10 and production technology thereof | |
| CN103194660B (en) | Manufacturing method of low-temperature ferrite nodular cast iron material | |
| CN108004460B (en) | High-strength high-toughness as-cast QT800-5 nodular cast iron and production method thereof | |
| CN101608280B (en) | Compound inoculant used for producing D-type graphite cast iron and preparation method thereof | |
| CN101818297B (en) | Manufacturing method of high-strength pearlitic nodular cast iron calendaring mould material | |
| CN101481771B (en) | Spheroidizing pearlite production method | |
| CN101333618B (en) | Long-acting synthesizing process of heavy sectioned ductile iron | |
| CN107723580B (en) | The production method of high-strength high-elongation ratio spheroidal graphite cast-iron | |
| CN102383027B (en) | Preparation method of nodular cast iron | |
| CN103484753A (en) | Novel as-cast 500-7 nodular cast iron | |
| CN103131942B (en) | High nodulizing rate vermicular cast iron and the method for making of IC engine cylinder body, cylinder cover | |
| CN109930058B (en) | Low-temperature high-strength high-toughness nodular cast iron at minus 40 ℃, preparation method thereof and railway locomotive part | |
| CN102002548A (en) | Nodularizer for nodular iron with thick section | |
| CN102400032B (en) | Large-cross-section nodular cast iron | |
| CN105401064A (en) | Medium silicon molybdenum nodular cast iron and production method thereof | |
| CN105220060A (en) | A kind of high-strength ductile cast iron and production method thereof | |
| CN104878275A (en) | Production technology for ductile iron casting with high strength and high ductility | |
| CN102260819A (en) | As-cast thick and large section pearlite based nodular cast iron material | |
| CN110964974A (en) | As-cast high-strength high-elongation synthetic nodular cast iron and preparation method thereof | |
| CN104726759A (en) | Production method of as-cast high-strength gray cast iron | |
| CN103484754B (en) | The production method of spheroidal graphite cast iron for planet carrier | |
| CN102191424A (en) | As-cast gray cast iron braking material with low alloy content and high thermal fatigue strength |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |