CN104878152A - Ductile cast iron production method - Google Patents
Ductile cast iron production method Download PDFInfo
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- CN104878152A CN104878152A CN201510269736.3A CN201510269736A CN104878152A CN 104878152 A CN104878152 A CN 104878152A CN 201510269736 A CN201510269736 A CN 201510269736A CN 104878152 A CN104878152 A CN 104878152A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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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 ductile cast iron production method and relates to the technical field of cast iron production. The following raw materials in parts by weight are included: 52-57 parts of Q16 pig iron or Q12 pig iron, 26-31 parts of steel scrap and 15-20 parts of recirculated iron. The ductile cast iron production method comprises the steps of material taking, melting, recarburization, nodularization, inoculation and the like. Compared with the prior art, as steel scrap is adopted as part of the raw materials to produce ductile cast iron, waste steel scrap is changed into valuable, and accordingly, the consumption of pig iron is reduced. The ductile cast iron production method is simple and feasible, reduces the price of the raw materials and is low in ductile cast iron production cost.
Description
Technical field
The present invention relates to Cast Iron Production technical field, especially a kind of production method of spheroidal graphite cast iron.
Background technology
Spheroidal graphite cast iron obtains globular graphite by nodularization and inoculation, effectively improves the mechanical property of cast iron, in particular improve plasticity and toughness, thus obtain the intensity also higher than carbon steel.Its over-all properties is close to steel, and be widely used in some stressed complexity of casting, intensity, toughness, wear resistance require higher part.Carry out spheroidizing again after the production of spheroidal graphite cast iron normally utilizes the pig iron and foundry returns high temperature melting, the production method of this spheroidal graphite cast iron need, by pig iron amount up to 80%, because pig iron cost of material is high, cause the production cost of spheroidal graphite cast iron high.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of production method of spheroidal graphite cast iron, with the problem that the spheroidal graphite cast iron cost solving the production of existing method is high.
In order to solve the problem, the technical solution used in the present invention is: the production method of this spheroidal graphite cast iron, comprises the raw material of following weight part: the Q16 pig iron or the Q12 pig iron: 52 parts ~ 57 parts, steel scrap: 26 parts ~ 31 parts, foundry return: 15 parts ~ 20 parts;
Production process is as follows:
A. the Q16 pig iron or the Q12 pig iron, steel scrap, foundry return is taken by the weight part of above-mentioned each raw material, for subsequent use;
B. described steel scrap is put into intermediate frequency furnace to carry out being fused into molten iron, be warming up to 1470 DEG C ~ 1500 DEG C, add carburelant by 3.7% ~ 4.2% of weight of molten iron, then add the described Q16 pig iron or the described Q12 pig iron;
C. treat that the molten iron temperature in stove rises to 1450 DEG C ~ 1480 DEG C again, add described foundry return;
D. get nodulizing agent by 1.6% ~ 2.0% of weight of molten iron and put into hot metal ladle, treat that the molten iron temperature in stove rises to 1450 DEG C ~ 1480 DEG C again, come out of the stove and put into hot metal ladle and carry out spheroidizing;
E. get nucleating agent by 1.0% ~ 1.8% of weight of molten iron to put into molten iron and carry out inoculation, obtain this spheroidal graphite cast iron.
Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect:
The present invention utilizes steel scrap to produce spheroidal graphite cast iron for part material, and steel scrap is turned waste into wealth, and reduces the consumption of the pig iron, the production method of this spheroidal graphite cast iron is simple, reduce the price of raw material, production cost is low, and the property indices of this spheroidal graphite cast iron is up to state standards the requirement of regulation.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1
A production method for spheroidal graphite cast iron, comprises the raw material of following weight: the Q16 pig iron: 520kg, steel scrap: 260kg, foundry return: 150kg;
Its production process is as follows:
A. the Q16 pig iron, steel scrap, foundry return is taken by the weight of above-mentioned each raw material, for subsequent use;
B. steel scrap is put into intermediate frequency furnace to carry out being fused into molten iron, be warming up to 1470 DEG C, add carburelant by 3.7% of weight of molten iron, then add the Q16 pig iron;
C. treat that the molten iron temperature in stove rises to 1450 DEG C again, add foundry return;
D. get nodulizing agent by 1.6% of weight of molten iron and put into hot metal ladle, treat that the molten iron temperature in stove rises to 1450 DEG C again, come out of the stove and put into hot metal ladle and carry out spheroidizing;
E. get nucleating agent by 1.0% of weight of molten iron to put into molten iron and carry out inoculation, obtain this spheroidal graphite cast iron.
Embodiment 2
A production method for spheroidal graphite cast iron, comprises the raw material of following weight: the Q16 pig iron: 570kg, steel scrap: 310kg, foundry return: 200kg;
Its production process is as follows:
A. the Q16 pig iron, steel scrap, foundry return is taken by the weight of above-mentioned each raw material, for subsequent use;
B. steel scrap is put into intermediate frequency furnace to carry out being fused into molten iron, be warming up to 1500 DEG C, add carburelant by 4.2% of weight of molten iron, then add the Q16 pig iron;
C. treat that the molten iron temperature in stove rises to 1480 DEG C again, add foundry return;
D. get nodulizing agent by 2.0% of weight of molten iron and put into hot metal ladle, treat that the molten iron temperature in stove rises to 1480 DEG C again, come out of the stove and put into hot metal ladle and carry out spheroidizing;
E. get nucleating agent by 1.8% of weight of molten iron to put into molten iron and carry out inoculation, obtain this spheroidal graphite cast iron.
Embodiment 3
A production method for spheroidal graphite cast iron, comprises the raw material of following weight: the Q12 pig iron: 520kg, steel scrap: 260kg, foundry return: 150kg;
Its production process is as follows:
A. the Q12 pig iron, steel scrap, foundry return is taken by the weight of above-mentioned each raw material, for subsequent use;
B. steel scrap is put into intermediate frequency furnace to carry out being fused into molten iron, be warming up to 1470 DEG C, add carburelant by 3.7% of weight of molten iron, then add the Q12 pig iron;
C. treat that the molten iron temperature in stove rises to 1450 DEG C again, add foundry return;
D. get nodulizing agent by 1.6% of weight of molten iron and put into hot metal ladle, treat that the molten iron temperature in stove rises to 1450 DEG C again, come out of the stove and put into hot metal ladle and carry out spheroidizing;
E. get nucleating agent by 1.0% of weight of molten iron to put into molten iron and carry out inoculation, obtain this spheroidal graphite cast iron.
Embodiment 4
A production method for spheroidal graphite cast iron, comprises the raw material of following weight: the Q12 pig iron: 570kg, steel scrap: 310kg, foundry return: 200kg;
Its production process is as follows:
A. the Q12 pig iron, steel scrap, foundry return is taken by the weight of above-mentioned each raw material, for subsequent use;
B. steel scrap is put into intermediate frequency furnace to carry out being fused into molten iron, be warming up to 1500 DEG C, add carburelant by 4.2% of weight of molten iron, then add the Q12 pig iron;
C. treat that the molten iron temperature in stove rises to 1480 DEG C again, add foundry return;
D. get nodulizing agent by 2.0% of weight of molten iron and put into hot metal ladle, treat that the molten iron temperature in stove rises to 1480 DEG C again, come out of the stove and put into hot metal ladle and carry out spheroidizing;
E. get nucleating agent by 1.8% of weight of molten iron to put into molten iron and carry out inoculation, obtain this spheroidal graphite cast iron.
Claims (1)
1. a production method for spheroidal graphite cast iron, is characterized in that the raw material comprising following weight part: the Q16 pig iron or the Q12 pig iron: 52 parts ~ 57 parts, steel scrap: 26 parts ~ 31 parts, foundry return: 15 parts ~ 20 parts;
Production process is as follows:
A. the Q16 pig iron or the Q12 pig iron, steel scrap, foundry return is taken by the weight part of above-mentioned each raw material, for subsequent use;
B. described steel scrap is put into intermediate frequency furnace to carry out being fused into molten iron, be warming up to 1470 DEG C ~ 1500 DEG C, add carburelant by 3.7% ~ 4.2% of weight of molten iron, then add the described Q16 pig iron or the described Q12 pig iron;
C. treat that the molten iron temperature in stove rises to 1450 DEG C ~ 1480 DEG C again, add described foundry return;
D. get nodulizing agent by 1.6% ~ 2.0% of weight of molten iron and put into hot metal ladle, treat that the molten iron temperature in stove rises to 1450 DEG C ~ 1480 DEG C again, come out of the stove and put into hot metal ladle and carry out spheroidizing;
E. get nucleating agent by 1.0% ~ 1.8% of weight of molten iron to put into molten iron and carry out inoculation, obtain this spheroidal graphite cast iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510269736.3A CN104878152A (en) | 2015-05-25 | 2015-05-25 | Ductile cast iron production method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510269736.3A CN104878152A (en) | 2015-05-25 | 2015-05-25 | Ductile cast iron production method |
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| CN104878152A true CN104878152A (en) | 2015-09-02 |
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| CN201510269736.3A Pending CN104878152A (en) | 2015-05-25 | 2015-05-25 | Ductile cast iron production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699778A (en) * | 2017-10-18 | 2018-02-16 | 湖州正德轻工机械有限公司 | A kind of production method of inexpensive spheroidal graphite cast-iron |
-
2015
- 2015-05-25 CN CN201510269736.3A patent/CN104878152A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107699778A (en) * | 2017-10-18 | 2018-02-16 | 湖州正德轻工机械有限公司 | A kind of production method of inexpensive spheroidal graphite cast-iron |
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Application publication date: 20150902 |