CN102304602A - Vermicular cast iron produced through short process production, production method and application thereof - Google Patents
Vermicular cast iron produced through short process production, production method and application thereof Download PDFInfo
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- CN102304602A CN102304602A CN201110242205A CN201110242205A CN102304602A CN 102304602 A CN102304602 A CN 102304602A CN 201110242205 A CN201110242205 A CN 201110242205A CN 201110242205 A CN201110242205 A CN 201110242205A CN 102304602 A CN102304602 A CN 102304602A
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- cast iron
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Abstract
A Technical problem solved by the present invention is to provide a method for producing vermicular cast iron, and an application thereof, wherein the energy consumption is reduced through the method, and short-process liquid iron is adopted as a raw material. The raw materials for producing the vermicular cast iron comprise, by weight, 40-60 parts of the liquid iron in a blast furnace, 40-60 parts of scrap steel, 2-3 parts of SiC, 0.6-0.8 parts of a Re-Mg-Ti-Ca vermiculizer and 1-1.2 parts of a ferrosilicon incubater. The matrix structure of the produced vermicular cast iron provided by the present invention comprises pearlite and ferrite. The mechanical properties of the produced vermicular cast iron are as follows: the tensile strength is more than or equal to 340 MPa, the elongation rate is more than or equal to 1%, the brinell hardness is 170-230 HB, and the vermicularity is more than or equal 80%.
Description
Technical field
The invention belongs to the production field of vermicular cast iron, be specifically related to utilize steel scrap and useless silicon carbide to be raw material, produce the methods and applications of vermicular cast iron.
Background technology
Vermicular cast iron as a kind of novel cast iron materials in the sixties in 20th century; Because vermicular cast iron has the performance of spheroidal graphite cast iron and graphitic cast iron concurrently; And good thermal fatigue, make application obtain good effect at aspects such as automobile engine cylinder-body, cylinder cap, vapor pipe, retarding disc, brake drums.
Traditional melting technology uses foundry iron, steel scrap, foundry returns to prepare as raw material and carry out melting, and is higher on cost.
Summary of the invention
The technical problem that the present invention will solve provides a kind of reduction energy expenditure, and adopting the molten iron of short flow process is raw material, produces the methods and applications of vermicular cast iron.
Technical scheme of the present invention is: a kind of vermicular cast iron of lacking flow process production, it is processed by the raw material of following parts by weight: the molten iron 40-60 in the blast furnace, steel scrap 40-60, SiC are 2-3, Re-Mg-Ti-Ca vermiculizer 0.6-0.8, ferrosilicon nucleating agent 1-1.2.
The working method of the vermicular cast iron that described short flow process is produced, its step is following:
(1) molten iron in the blast furnace and steel scrap are added the intermediate frequency furnace melting, temperature is raised to 1480-1530 ℃ after with SiC with carburelant adding carry out modified;
(2) the Re-Mg-Ti-Ca vermiculizer is put into the bag end, adopted and pour the processing of wriggling of method, iron liquid tapping temperature is 1480-1520 ℃;
(3) carry out inoculation with ferro-silicon;
(4) the iron liquid after will breeding is poured into a mould, and adopts top pouring, tide mould sand moulding, and teeming temperature is 1330-1390 ℃, and be 8-12 minute the duration of pouring.
The vermicular cast iron that described short flow process is produced is applied to produce retarding disc, brake drum or mould.
The invention has the beneficial effects as follows: the present invention directly joins in the intermediate frequency furnace with the molten iron in the blast furnace, has saved the process of melting, has reduced by 30% energy expenditure; Use molten iron and steel scrap, useless silicon carbide to prepare original iron melt as main raw material in the proportioning of the present invention, realize save energy and distributing rationally of turning waste into wealth, cost has been practiced thrift in stable performance, obvious social benefit; The present invention uses steel scrap and useless silicon carbide to be main raw material preparation iron liquid, because steel scrap and useless silicon carbide source are a lot, the purchasing of raw materials is convenient, turns waste into wealth, and saves cost, increases the performance of enterprises; The present invention has improved direct with the pig iron, steel scrap, foundry returns melting preparation original iron melt; Add useless silicon carbide with blast-melted, steel scrap and come proportioning, and then improved product performance, the vermicular cast iron excellent performance of production; Metallographic and nodulizing rate reach requirement index, good stability simultaneously.
The matrix of the vermicular cast iron that the present invention produces is perlite+ferrite, and mechanical property is: tensile strength >=340Mpa; Unit elongation >=1%, Brinell hardness are 170-230HB, nodulizing rate >=80%.
Embodiment
Embodiment 1
A kind of vermicular cast iron of lacking flow process production, it is processed by the raw material of following parts by weight: molten iron 40 kg in the blast furnace, steel scrap 60 kg, SiC are 3 kg, Re-Mg-Ti-Ca vermiculizer 0.8 kg, ferrosilicon nucleating agent 1 kg.
The working method of the vermicular cast iron that described short flow process is produced, its step is following:
(1) molten iron in the blast furnace and steel scrap are added the intermediate frequency furnace melting, temperature is raised to 1480 ℃ after with SiC with carburelant adding carry out modified;
(2) the Re-Mg-Ti-Ca vermiculizer is put into the bag end, adopted and pour the processing of wriggling of method, iron liquid tapping temperature is 1480 ℃;
(3) carry out inoculation with ferro-silicon;
(4) the iron liquid after will breeding is poured into a mould, and adopts top pouring, tide mould sand moulding, and teeming temperature is 1330 ℃, and be 8 minutes the duration of pouring.
Described vermicular cast iron can be used for producing retarding disc, brake drum or mould.
Embodiment 2
A kind of vermicular cast iron of lacking flow process production, it is processed by the raw material of following parts by weight: molten iron 60 kg in the blast furnace, steel scrap 40 kg, SiC are 2 kg, Re-Mg-Ti-Ca vermiculizer 0.6 kg, ferrosilicon nucleating agent 1 kg.
The working method of the vermicular cast iron that described short flow process is produced, its step is following:
(1) molten iron in the blast furnace and steel scrap are added the intermediate frequency furnace melting, temperature is raised to 1530 ℃ after with SiC with carburelant adding carry out modified;
(2) the Re-Mg-Ti-Ca vermiculizer is put into the bag end, adopted and pour the processing of wriggling of method, iron liquid tapping temperature is 1520 ℃;
(3) carry out inoculation with ferro-silicon;
(4) the iron liquid after will breeding is poured into a mould, and adopts top pouring, tide mould sand moulding, and teeming temperature is 1330 ℃, and be 12 minutes the duration of pouring.
Described vermicular cast iron can be used for producing retarding disc, brake drum or mould.
Embodiment 3
A kind of vermicular cast iron of lacking flow process production, it is processed by the raw material of following parts by weight: molten iron 50 kg in the blast furnace, steel scrap 50 kg, SiC are 2.5 kg, Re-Mg-Ti-Ca vermiculizer 0.7 kg, ferrosilicon nucleating agent 1.1 kg.
The working method of the vermicular cast iron that described short flow process is produced, its step is following:
(1) molten iron in the blast furnace and steel scrap are added the intermediate frequency furnace melting, temperature is raised to 1500 ℃ after with SiC with carburelant adding carry out modified;
(2) the Re-Mg-Ti-Ca vermiculizer is put into the bag end, adopted and pour the processing of wriggling of method, iron liquid tapping temperature is 1500 ℃;
(3) carry out inoculation with ferro-silicon;
(4) the iron liquid after will breeding is poured into a mould, and adopts top pouring, tide mould sand moulding, and teeming temperature is 1350 ℃, and be 10 minutes the duration of pouring.
Described vermicular cast iron can be used for producing retarding disc, brake drum or mould.
Embodiment 4
A kind of vermicular cast iron of lacking flow process production, it is processed by the raw material of following parts by weight: molten iron 55 kg in the blast furnace, steel scrap 45 kg, SiC are 2.8 kg, Re-Mg-Ti-Ca vermiculizer 0.8 kg, ferrosilicon nucleating agent 1.2 kg.
The working method of the vermicular cast iron that described short flow process is produced, its step is following:
(1) molten iron in the blast furnace and steel scrap are added the intermediate frequency furnace melting, temperature is raised to 1520 ℃ after with SiC with carburelant adding carry out modified;
(2) the Re-Mg-Ti-Ca vermiculizer is put into the bag end, adopted and pour the processing of wriggling of method, iron liquid tapping temperature is 1480 ℃;
(3) carry out inoculation with ferro-silicon;
(4) the iron liquid after will breeding is poured into a mould, and adopts top pouring, tide mould sand moulding, and teeming temperature is 1350 ℃, and be 10 minutes the duration of pouring.
Described vermicular cast iron can be used for producing retarding disc, brake drum.
Embodiment 5
A kind of vermicular cast iron of lacking flow process production, it is processed by the raw material of following parts by weight: molten iron 45 kg in the blast furnace, steel scrap 55 kg, SiC are 2.6 kg, Re-Mg-Ti-Ca vermiculizer 0.8 kg, ferrosilicon nucleating agent 1.2 kg.
The working method of the vermicular cast iron that described short flow process is produced, its step is following:
(1) molten iron in the blast furnace and steel scrap are added the intermediate frequency furnace melting, temperature is raised to 1530 ℃ after with SiC with carburelant adding carry out modified;
(2) the Re-Mg-Ti-Ca vermiculizer is put into the bag end, adopted and pour the processing of wriggling of method, iron liquid tapping temperature is 1480 ℃;
(3) carry out inoculation with ferro-silicon;
(4) the iron liquid after will breeding is poured into a mould, and adopts top pouring, tide mould sand moulding, and teeming temperature is 1380 ℃, and be 8 minutes the duration of pouring.
Described vermicular cast iron can be used for producing retarding disc, brake drum or mould.
Embodiment 6
A kind of vermicular cast iron of lacking flow process production, it is processed by the raw material of following parts by weight: molten iron 50 kg in the blast furnace, steel scrap 50 kg, SiC are 3 kg, Re-Mg-Ti-Ca vermiculizer 0.8 kg, ferrosilicon nucleating agent 1.2 kg.
The working method of the vermicular cast iron that described short flow process is produced, its step is following:
(1) molten iron in the blast furnace and steel scrap are added the intermediate frequency furnace melting, temperature is raised to 1480 ℃ after with SiC with carburelant adding carry out modified;
(2) the Re-Mg-Ti-Ca vermiculizer is put into the bag end, adopted and pour the processing of wriggling of method, iron liquid tapping temperature is 1480 ℃;
(3) carry out inoculation with ferro-silicon;
(4) the iron liquid after will breeding is poured into a mould, and adopts top pouring, tide mould sand moulding, and teeming temperature is 1380 ℃, and be 8-12 minute the duration of pouring.
Described vermicular cast iron can be used for producing retarding disc, brake drum or mould.
The composition of product of the present invention is: C 3.4-3.6%, Si2.3-2.6%, Mn1.4-1.6%, P≤0.5% S≤0.2%.
Claims (3)
1. lack the vermicular cast iron that flow process is produced for one kind, it is characterized in that it is processed by the raw material of following parts by weight: the molten iron 40-60 in the blast furnace, steel scrap 40-60, SiC are 2-3, Re-Mg-Ti-Ca vermiculizer 0.6-0.8, ferrosilicon nucleating agent 1-1.2.
2. the working method of the vermicular cast iron that short flow process as claimed in claim 1 is produced, it is characterized in that: its step is following:
(1) molten iron in the blast furnace and steel scrap are added the intermediate frequency furnace melting, temperature is raised to 1480-1530 ℃ after with SiC with carburelant adding carry out modified;
(2) the Re-Mg-Ti-Ca vermiculizer is put into the bag end, adopted and pour the processing of wriggling of method, iron liquid tapping temperature is 1480-1520 ℃;
(3) carry out inoculation with ferro-silicon;
(4) the iron liquid after will breeding is poured into a mould, and adopts top pouring, tide mould sand moulding, and teeming temperature is 1330-1390 ℃, and be 8-12 minute the duration of pouring.
3. the vermicular cast iron that short flow process as claimed in claim 1 is produced is applied to produce retarding disc, brake drum or mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242205A CN102304602A (en) | 2011-08-23 | 2011-08-23 | Vermicular cast iron produced through short process production, production method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110242205A CN102304602A (en) | 2011-08-23 | 2011-08-23 | Vermicular cast iron produced through short process production, production method and application thereof |
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| CN102304602A true CN102304602A (en) | 2012-01-04 |
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| CN201110242205A Pending CN102304602A (en) | 2011-08-23 | 2011-08-23 | Vermicular cast iron produced through short process production, production method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119168A (en) * | 2017-06-13 | 2017-09-01 | 磐石华兴汽车零部件制造有限公司 | A kind of method that blast-melted short route casts high-quality casting |
| CN109355554A (en) * | 2018-10-31 | 2019-02-19 | 西安理工大学 | A kind of method of short route horizontal casting spheroidal graphite cast-iron profile |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092673A (en) * | 2006-06-19 | 2007-12-26 | 张跃成 | Refining technique for manufacturing pieces of vermicular cast iron |
| CN101768691A (en) * | 2009-12-29 | 2010-07-07 | 青州豪章铸造有限公司 | Productive technology of short flow of structure type cast iron part |
| CN101787403A (en) * | 2010-01-29 | 2010-07-28 | 河北工业大学 | Short process production technique for preparing casting of wind power generation equipment |
| CN101942598A (en) * | 2010-10-28 | 2011-01-12 | 黄元吉 | Cast iron production process capable of stabilizing high vermicular rate |
-
2011
- 2011-08-23 CN CN201110242205A patent/CN102304602A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092673A (en) * | 2006-06-19 | 2007-12-26 | 张跃成 | Refining technique for manufacturing pieces of vermicular cast iron |
| CN101768691A (en) * | 2009-12-29 | 2010-07-07 | 青州豪章铸造有限公司 | Productive technology of short flow of structure type cast iron part |
| CN101787403A (en) * | 2010-01-29 | 2010-07-28 | 河北工业大学 | Short process production technique for preparing casting of wind power generation equipment |
| CN101942598A (en) * | 2010-10-28 | 2011-01-12 | 黄元吉 | Cast iron production process capable of stabilizing high vermicular rate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119168A (en) * | 2017-06-13 | 2017-09-01 | 磐石华兴汽车零部件制造有限公司 | A kind of method that blast-melted short route casts high-quality casting |
| CN107119168B (en) * | 2017-06-13 | 2018-11-30 | 磐石华兴汽车零部件制造有限公司 | A kind of method of blast-melted short route casting high-quality casting |
| CN109355554A (en) * | 2018-10-31 | 2019-02-19 | 西安理工大学 | A kind of method of short route horizontal casting spheroidal graphite cast-iron profile |
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Application publication date: 20120104 |