CN112808937A - Casting process of ductile iron casting - Google Patents
Casting process of ductile iron casting Download PDFInfo
- Publication number
- CN112808937A CN112808937A CN202011634724.3A CN202011634724A CN112808937A CN 112808937 A CN112808937 A CN 112808937A CN 202011634724 A CN202011634724 A CN 202011634724A CN 112808937 A CN112808937 A CN 112808937A
- Authority
- CN
- China
- Prior art keywords
- casting
- ductile iron
- iron
- magnesium alloy
- casting process
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
Abstract
The invention relates to the technical field of ductile iron casting, in particular to a casting process of ductile iron castings. The method comprises the following steps: the first step is as follows: manufacturing a white mould, and performing fine trimming and flame retardant coating spraying on the white mould; the second step is that: placing the white mold in a sand box to manufacture a sand mold; the third step: heating the sand mold to gasify and discharge the white mold; the fourth step: preparing molten metal, and pouring the prepared molten metal into a sand box; the fifth step: and after the pouring is finished, cooling the casting, and finally performing shakeout treatment. According to the invention, the casting process of the ductile iron casting can reduce the deformation and cracking of the ductile iron casting, ensure that the ductile iron casting has good comprehensive mechanical properties, obviously increase the energy consumption, shorten the casting production period and greatly meet the production requirements of producers.
Description
Technical Field
The invention relates to the technical field of casting of ductile iron castings, in particular to a casting process of ductile iron castings.
Background
The ductile iron casting is more and more widely applied to mechanical manufacturing due to good comprehensive performance, however, for some ductile iron thin-wall parts, because of high solidification cooling speed, carbides are easy to appear in a solidification structure, and the ductile iron has a tendency of white cast, so that the toughness of the ductile iron is greatly reduced.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a casting process of a ductile iron casting.
In order to achieve the purpose, the invention adopts the following technical scheme:
a casting process of ductile iron castings comprises the following steps:
the first step is as follows: manufacturing a white mould, and performing fine trimming and flame retardant coating spraying on the white mould;
the second step is that: placing the white mold in a sand box to manufacture a sand mold;
the third step: heating the sand mold to gasify and discharge the white mold;
the fourth step: preparing molten metal, and pouring the prepared molten metal into a sand box;
the fifth step: and after the pouring is finished, cooling the casting, and finally performing shakeout treatment.
Preferably, the preparation of the molten metal comprises the following steps:
s1, smelting low-silicon nodular iron base iron in an electric furnace by adopting scrap steel, steel-making pig iron and a carburant;
s2, discharging the low-silicon ductile iron base iron to a spheroidizing bag when the temperature of the low-silicon ductile iron base iron reaches 1500 ℃, and adding an alloy mixed solution for microalloying treatment;
s3, carrying out slagging-off operation after molten iron is subjected to spheroidizing ladle treatment;
and S4, introducing the spheroidized molten iron into a pouring ladle for subsequent casting operation.
Preferably, the molten metal is prepared by an electric furnace smelting and casting method.
Preferably, the low-silicon ductile iron base iron comprises the following components in percentage by mass:
6-8% of carbon, 1-2% of silicon, 0.5-0.8% of manganese, 0.05-0.08% of sulfur, 0.02-0.03% of phosphorus and the balance of molten iron.
Preferably, the alloy mixed solution comprises a copper-magnesium alloy and a nickel-magnesium alloy, and the mass fraction of the copper-magnesium alloy and the mass fraction of the nickel-magnesium alloy are 1.5: 2.
Preferably, the ratio of the weight part of copper to the weight part of magnesium in the copper-magnesium alloy is 5: 1.
Preferably, the ratio of the weight part of nickel to the weight part of magnesium in the nickel-magnesium alloy is 5.5: 1.
Preferably, the casting cooling is indoor normal-temperature cooling, and the cooling time of the casting is 24-36 h.
The invention has the beneficial effects that:
according to the invention, the casting process of the ductile iron casting can reduce the deformation and cracking of the ductile iron casting, ensure that the ductile iron casting has good comprehensive mechanical properties, obviously increase the energy consumption, shorten the casting production period and greatly meet the production requirements of producers.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely in connection with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
A casting process of ductile iron castings comprises the following steps:
the first step is as follows: manufacturing a white mould, and performing fine trimming and flame retardant coating spraying on the white mould;
the second step is that: placing the white mold in a sand box to manufacture a sand mold;
the third step: heating the sand mold to gasify and discharge the white mold;
the fourth step: preparing molten metal, and pouring the prepared molten metal into a sand box;
the fifth step: and after the pouring is finished, cooling the casting, and finally performing shakeout treatment.
Preferably, the preparation of the molten metal comprises the following steps:
s1, smelting low-silicon nodular iron base iron in an electric furnace by adopting scrap steel, steel-making pig iron and a carburant;
s2, discharging the low-silicon ductile iron base iron to a spheroidizing bag when the temperature of the low-silicon ductile iron base iron reaches 1500 ℃, and adding an alloy mixed solution to carry out microalloying treatment, wherein the microalloying treatment can ensure that graphite becomes spherical and the graphite spheres are small in size;
s3, carrying out slagging-off operation after molten iron is subjected to spheroidizing ladle treatment;
and S4, introducing the spheroidized molten iron into a pouring ladle for subsequent casting operation.
Preferably, the molten metal is prepared by an electric furnace smelting and casting method.
Preferably, the low-silicon ductile iron base iron comprises the following components in percentage by mass:
6-8% of carbon, 1-2% of silicon, 0.5-0.8% of manganese, 0.05-0.08% of sulfur, 0.02-0.03% of phosphorus and the balance of molten iron.
Preferably, the alloy mixed solution comprises a copper-magnesium alloy and a nickel-magnesium alloy, and the mass fraction of the copper-magnesium alloy and the mass fraction of the nickel-magnesium alloy are 1.5: 2.
Preferably, the ratio of the weight part of copper to the weight part of magnesium in the copper-magnesium alloy is 5:1, and copper and nickel enter the matrix, so that the strength of the matrix can be greatly improved.
Preferably, the ratio of the weight part of nickel to the weight part of magnesium in the nickel-magnesium alloy is 5.5: 1.
Preferably, the casting is cooled at room normal temperature, the cooling time of the casting is 24-36 h, and the casting is cooled at room normal temperature, so that the production energy consumption can be greatly reduced.
Example one
A casting process of ductile iron castings comprises the following steps:
the first step is as follows: manufacturing a white mould, and performing fine trimming and flame retardant coating spraying on the white mould;
the second step is that: placing the white mold in a sand box to manufacture a sand mold;
the third step: heating the sand mold to gasify and discharge the white mold;
the fourth step: preparing molten metal, and pouring the prepared molten metal into a sand box;
the fifth step: and after the pouring is finished, cooling the casting, and finally performing shakeout treatment.
Preferably, the preparation of the molten metal comprises the following steps:
s1, smelting low-silicon nodular iron base iron in an electric furnace by adopting scrap steel, steel-making pig iron and a carburant;
s2, discharging the low-silicon ductile iron base iron to a spheroidizing bag when the temperature of the low-silicon ductile iron base iron reaches 1500 ℃, and adding an alloy mixed solution to carry out microalloying treatment, wherein the microalloying treatment can ensure that graphite becomes spherical and the graphite spheres are small in size;
s3, carrying out slagging-off operation after molten iron is subjected to spheroidizing ladle treatment;
and S4, introducing the spheroidized molten iron into a pouring ladle for subsequent casting operation.
Preferably, the molten metal is prepared by an electric furnace smelting and casting method.
Preferably, the low-silicon ductile iron base iron comprises the following components in percentage by mass:
6% of carbon, 1% of silicon, 0.5% of manganese, 0.05% of sulfur, 0.02% of phosphorus and the balance of molten iron.
Preferably, the alloy mixed solution comprises a copper-magnesium alloy and a nickel-magnesium alloy, and the mass fraction of the copper-magnesium alloy and the mass fraction of the nickel-magnesium alloy are 1.5: 2.
Preferably, the ratio of the weight part of copper to the weight part of magnesium in the copper-magnesium alloy is 5:1, and copper and nickel enter the matrix, so that the strength of the matrix can be greatly improved.
Preferably, the ratio of the weight part of nickel to the weight part of magnesium in the nickel-magnesium alloy is 5.5: 1.
Preferably, the casting is cooled at room normal temperature, the cooling time of the casting is 24-36 h, and the casting is cooled at room normal temperature, so that the production energy consumption can be greatly reduced.
Example two
A casting process of ductile iron castings comprises the following steps:
the first step is as follows: manufacturing a white mould, and performing fine trimming and flame retardant coating spraying on the white mould;
the second step is that: placing the white mold in a sand box to manufacture a sand mold;
the third step: heating the sand mold to gasify and discharge the white mold;
the fourth step: preparing molten metal, and pouring the prepared molten metal into a sand box;
the fifth step: and after the pouring is finished, cooling the casting, and finally performing shakeout treatment.
Preferably, the preparation of the molten metal comprises the following steps:
s1, smelting low-silicon nodular iron base iron in an electric furnace by adopting scrap steel, steel-making pig iron and a carburant;
s2, discharging the low-silicon ductile iron base iron to a spheroidizing bag when the temperature of the low-silicon ductile iron base iron reaches 1500 ℃, and adding an alloy mixed solution to carry out microalloying treatment, wherein the microalloying treatment can ensure that graphite becomes spherical and the graphite spheres are small in size;
s3, carrying out slagging-off operation after molten iron is subjected to spheroidizing ladle treatment;
and S4, introducing the spheroidized molten iron into a pouring ladle for subsequent casting operation.
Preferably, the molten metal is prepared by an electric furnace smelting and casting method.
Preferably, the low-silicon ductile iron base iron comprises the following components in percentage by mass:
8% of carbon, 2% of silicon, 0.8% of manganese, 0.08% of sulfur, 0.03% of phosphorus and the balance of molten iron.
Preferably, the alloy mixed solution comprises a copper-magnesium alloy and a nickel-magnesium alloy, and the mass fraction of the copper-magnesium alloy and the mass fraction of the nickel-magnesium alloy are 1.5: 2.
Preferably, the ratio of the weight part of copper to the weight part of magnesium in the copper-magnesium alloy is 5:1, and copper and nickel enter the matrix, so that the strength of the matrix can be greatly improved.
Preferably, the ratio of the weight part of nickel to the weight part of magnesium in the nickel-magnesium alloy is 5.5: 1.
Preferably, the casting is cooled at room normal temperature, the cooling time of the casting is 24-36 h, and the casting is cooled at room normal temperature, so that the production energy consumption can be greatly reduced.
According to the invention, the casting process of the ductile iron casting can reduce the deformation and cracking of the ductile iron casting, ensure that the ductile iron casting has good comprehensive mechanical properties, obviously increase the energy consumption, shorten the casting production period and greatly meet the production requirements of producers.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention should be covered by the scope of the present invention.
Claims (8)
1. The casting process of the ductile iron casting is characterized by comprising the following steps of:
the first step is as follows: manufacturing a white mould, and performing fine trimming and flame retardant coating spraying on the white mould;
the second step is that: placing the white mold in a sand box to manufacture a sand mold;
the third step: heating the sand mold to gasify and discharge the white mold;
the fourth step: preparing molten metal, and pouring the prepared molten metal into a sand box;
the fifth step: and after the pouring is finished, cooling the casting, and finally performing shakeout treatment.
2. A casting process of a ductile iron casting according to claim 1 wherein the preparation of molten metal comprises the steps of:
s1, smelting low-silicon nodular iron base iron in an electric furnace by adopting scrap steel, steel-making pig iron and a carburant;
s2, discharging the low-silicon ductile iron base iron to a spheroidizing bag when the temperature of the low-silicon ductile iron base iron reaches 1500 ℃, and adding an alloy mixed solution for microalloying treatment;
s3, carrying out slagging-off operation after molten iron is subjected to spheroidizing ladle treatment;
and S4, introducing the spheroidized molten iron into a pouring ladle for subsequent casting operation.
3. The casting process of ductile iron castings according to claim 1, wherein said molten metal is prepared for production by electric furnace melting casting method.
4. The casting process of the ductile iron casting according to claim 2, wherein the low-silicon ductile iron base iron comprises the following components in percentage by mass:
6-8% of carbon, 1-2% of silicon, 0.5-0.8% of manganese, 0.05-0.08% of sulfur, 0.02-0.03% of phosphorus and the balance of molten iron.
5. The casting process of the ductile iron casting according to claim 2, wherein the alloy mixture comprises a copper magnesium alloy and a nickel magnesium alloy, and the mass fraction ratio of the copper magnesium alloy to the nickel magnesium alloy is 1.5: 2.
6. A casting process of a ductile iron casting according to claim 5 wherein the ratio of parts by weight of copper to parts by weight of magnesium in the copper magnesium alloy is 5: 1.
7. A casting process of a ductile iron casting according to claim 5 wherein the ratio of parts by weight of nickel to parts by weight of magnesium in the nickel magnesium alloy is 5.5: 1.
8. The casting process of the ductile iron casting according to claim 1, wherein the cooling of the casting is room temperature cooling, and the cooling time of the casting is 24h-36 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011634724.3A CN112808937A (en) | 2020-12-31 | 2020-12-31 | Casting process of ductile iron casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011634724.3A CN112808937A (en) | 2020-12-31 | 2020-12-31 | Casting process of ductile iron casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112808937A true CN112808937A (en) | 2021-05-18 |
Family
ID=75858303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011634724.3A Pending CN112808937A (en) | 2020-12-31 | 2020-12-31 | Casting process of ductile iron casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112808937A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115945642A (en) * | 2023-01-04 | 2023-04-11 | 淄博水环真空泵厂有限公司 | EPS foaming mold casting process of dry screw vacuum pump rotor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415307A (en) * | 1966-03-03 | 1968-12-10 | United States Pipe Foundry | Process for casting ductile iron |
| AT289168B (en) * | 1968-05-31 | 1971-04-13 | Ver Fuer Praktische Giessereif | Process for the production of spheroidal graphite cast iron |
| CN103789481A (en) * | 2014-01-24 | 2014-05-14 | 北京工业大学 | High-toughness spherical iron and manufacturing method thereof |
| CN105964920A (en) * | 2016-06-29 | 2016-09-28 | 兴化市雅兰机械制造有限公司 | White die casting process for ductile iron casting |
| CN110106434A (en) * | 2019-04-30 | 2019-08-09 | 徐州天太机械制造有限公司 | A kind of wear resistant cast iron steel ball and preparation method thereof |
| CN111549272A (en) * | 2020-05-16 | 2020-08-18 | 江苏金玉龙铁路器材有限公司 | Preparation method of novel nodular cast iron railway turnout fitting |
-
2020
- 2020-12-31 CN CN202011634724.3A patent/CN112808937A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415307A (en) * | 1966-03-03 | 1968-12-10 | United States Pipe Foundry | Process for casting ductile iron |
| AT289168B (en) * | 1968-05-31 | 1971-04-13 | Ver Fuer Praktische Giessereif | Process for the production of spheroidal graphite cast iron |
| CN103789481A (en) * | 2014-01-24 | 2014-05-14 | 北京工业大学 | High-toughness spherical iron and manufacturing method thereof |
| CN105964920A (en) * | 2016-06-29 | 2016-09-28 | 兴化市雅兰机械制造有限公司 | White die casting process for ductile iron casting |
| CN110106434A (en) * | 2019-04-30 | 2019-08-09 | 徐州天太机械制造有限公司 | A kind of wear resistant cast iron steel ball and preparation method thereof |
| CN111549272A (en) * | 2020-05-16 | 2020-08-18 | 江苏金玉龙铁路器材有限公司 | Preparation method of novel nodular cast iron railway turnout fitting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115945642A (en) * | 2023-01-04 | 2023-04-11 | 淄博水环真空泵厂有限公司 | EPS foaming mold casting process of dry screw vacuum pump rotor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108531803B (en) | A kind of casting method of spheroidal graphite cast-iron valve body | |
| CN103451510B (en) | The manufacture method of vermicular cast iron piston ring | |
| CN102876962B (en) | Method for manufacturing bainite ductile cast iron piston ring | |
| CN103820704B (en) | Form in High Nickel Austenite Nodular Cast Iron material of vehicle turbine housing and preparation method thereof | |
| CN102965567A (en) | Casting thick large-section pearlite nodular cast iron and casting method thereof | |
| CN105598389B (en) | A kind of casting technique for the composite flange for sealing rain-proof | |
| CN105964912A (en) | Crankshaft casting technology | |
| CN103484753A (en) | Novel as-cast 500-7 nodular cast iron | |
| CN103084542A (en) | Process for casting heat-resistant steel or wear-resistant alloy steel by evaporative pattern casting (EPC) | |
| CN102181783A (en) | High-strength ductile cast iron and manufacturing method thereof | |
| CN105401064A (en) | Medium silicon molybdenum nodular cast iron and production method thereof | |
| CN102400032B (en) | Large-cross-section nodular cast iron | |
| CN101603142A (en) | A kind of high-intensity high-tenacity ductile cast iron casting and preparation method thereof | |
| CN105886693A (en) | Smelting method for medium-strength and high-ductility ductile cast iron | |
| CN104745758A (en) | Preparation method of gray iron casting | |
| CN112808937A (en) | Casting process of ductile iron casting | |
| CN102019351A (en) | Method for producing spheroidal graphite iron casting with high strength and thick and uniform wall | |
| CN110983171B (en) | Method for producing as-cast high-strength all-ferrite nodular cast iron differential case by sand-lined iron mold | |
| CN101962732A (en) | Austenite nodular cast iron diffuser and production method thereof | |
| CN102121080A (en) | Austenite spheroidal graphite cast iron diffuser and production method thereof | |
| CN102517476B (en) | High strength aluminum alloy capable of reducing porosity and dispersed shrinkage and preparation method thereof | |
| CN104480380A (en) | Forming process suitable for preparing water-cooling metal mold centrifugal nodular cast iron pipe | |
| CN109321814B (en) | Cast iron section bar for glass mold and preparation method thereof | |
| CN102051520B (en) | Composite beam connecting piece for maglev train and casting method of composite beam connecting piece | |
| CN112453322A (en) | Preparation method of balance shaft bracket casting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |