CN115029495A - Pearlite inoculant formula - Google Patents
Pearlite inoculant formula Download PDFInfo
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- CN115029495A CN115029495A CN202210676763.2A CN202210676763A CN115029495A CN 115029495 A CN115029495 A CN 115029495A CN 202210676763 A CN202210676763 A CN 202210676763A CN 115029495 A CN115029495 A CN 115029495A
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- CN
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- Prior art keywords
- pearlite
- inoculant
- raw materials
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Classifications
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- 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
- C21C1/08—Manufacture of cast-iron
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
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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
Abstract
The invention discloses a formula of a pearlite inoculant, which comprises the following components in percentage by mass: si: 55-65%, Ba: 4-6%, Ca: 2-4%, Sb: 3-5 percent of the total weight of the composition and the balance of auxiliary materials. The pearlite inoculant of the invention is added with antimony, and the addition amount of the antimony is related to the pearlite degree: when the pearlite is about 70%, antimony is added to 3%, and when the pearlite is more than 90%, Sb is added to 5%, so that the increase of the pearlite content can be promoted, and the pearlite content is stable in the graphitization process.
Description
Technical Field
The invention relates to the technical field of pearlite inoculants, in particular to a formula of a pearlite inoculant.
Background
The inoculant can promote graphitization, reduce chilling tendency, improve graphite morphology and distribution, increase eutectic cell number, and refine matrix structure, and has good effect in a short time (about 5-8 minutes) after inoculation. Is mainly applicable to common natural parts or late instantaneous inoculation in various situations. The inoculation treatment is that a small amount of other substances are added into the liquid metal in the solidification process to promote nucleation and inhibit growth, so as to achieve the purpose of refining grains. Conventionally, the addition of additives to cast iron is called inoculation; the addition of additives to the non-ferrous alloys is called a modification treatment. Essentially, inoculation mainly affects nucleation and promotes grain dissociation; the modification treatment changes the growth mechanism of the crystal (inhibits growth), thereby influencing the appearance of the crystal.
The existing pearlite inoculant is difficult to maintain the stability of pearlite content in the graphitization process, and especially when the existing pearlite inoculant is used in a steel ladle or a riser, the existing pearlite inoculant is difficult to increase the pearlite content and the improvement effect is not obvious.
Therefore, we propose a formulation of pearlite inoculant to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a formula of a pearlite inoculant.
The formula of the pearlite inoculant comprises the following components in percentage by mass: si: 55-65%, Ba: 4-6%, Ca: 2-4%, Sb: 3-5% and the balance of auxiliary materials;
the preparation method of the pearlite inoculant comprises the following steps: weighing the raw materials according to the proportion, and respectively putting the raw materials into a ball mill for grinding; uniformly mixing the ground raw materials, putting the mixture into a smelting furnace for melting, heating to 1600 ℃, and smelting for 10-15min, wherein the raw materials are continuously stirred in the smelting process until the raw materials are uniformly mixed; after the raw materials are fully melted, the cast ingot is cooled and then crushed and granulated, and the granulation particle sizes are respectively within 1mm, 1-3mm and 4-8 mm.
Preferably, the pearlite inoculant comprises the following components in percentage by mass: si: 57-63%, Ba: 4.5-5.5%, Ca: 2.5 to 3.5%, Sb: 3.5-4.5%, and the balance of auxiliary materials.
Preferably, the pearlite inoculant comprises the following components in percentage by mass: si: 60%, Ba: 5%, Ca: 3%, Sb: 4 percent and the balance of auxiliary materials.
Preferably, the Sb addition is related to the extent of pearlite: about 70% of pearlite is added to Sb in an amount of 3%, and 90% or more of pearlite is added to Sb in an amount of 5%.
Preferably, when the pearlite inoculant is put into a ladle for use, the particle size of the pearlite inoculant is 1-3mm or 4-8 mm.
Preferably, when the pearlite inoculant is placed in a feeder for use, the particle size of the pearlite inoculant is within 1 mm.
The beneficial effects of the invention are: the pearlite inoculant of the invention is added with antimony, and the addition amount of the antimony is related to the degree of the pearlite: when the pearlite is about 70%, antimony is added to 3%, and when the pearlite is more than 90%, Sb is added to 5%, so that the increase of the pearlite content can be promoted, and the pearlite content is stable in the graphitization process.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example 1
The formula of the pearlite inoculant comprises the following components in percentage by mass: si: 55%, Ba: 4%, Ca: 2%, Sb: 3 percent of the total weight of the mixture, and the balance of auxiliary materials.
The preparation method of the pearlite inoculant comprises the following steps: weighing the raw materials according to the proportion, and respectively putting the raw materials into a ball mill for grinding; uniformly mixing the ground raw materials, putting the mixture into a smelting furnace for smelting, heating to 1600 ℃, and smelting for 10min, wherein the raw materials are continuously stirred in the smelting process until the raw materials are uniformly mixed; after the raw materials are fully melted, the cast ingot is cooled and then crushed and granulated, and the granulation particle sizes are 0.8mm and 1mm respectively.
Furthermore, the amount of Sb added is related to the extent of pearlite: about 70% of pearlite is added to Sb in an amount of 3%, and 90% or more of pearlite is added to Sb in an amount of 5%.
Furthermore, when the pearlite inoculant is put into a steel ladle for use, the grain size of the pearlite inoculant is 1 mm.
Furthermore, when the pearlite inoculant is placed in a riser for use, the particle size of the pearlite inoculant is 0.8 mm.
Example 2
The formula of the pearlite inoculant comprises the following components in percentage by mass: si: 60%, Ba: 5%, Ca: 3%, Sb: 4 percent, and the balance of auxiliary materials;
the preparation method of the pearlite inoculant comprises the following steps: weighing the raw materials according to the proportion, and respectively putting the raw materials into a ball mill for grinding; uniformly mixing the ground raw materials, putting the mixture into a smelting furnace for smelting, heating to 1600 ℃, and smelting for 13min, wherein the raw materials are continuously stirred in the smelting process until the raw materials are uniformly mixed; after the raw materials are fully melted, the cast ingot is cooled and then crushed and granulated, and the granulation particle sizes are 0.5mm and 4mm respectively.
Furthermore, the amount of Sb added is related to the extent of pearlite: about 70% of pearlite is added to Sb in an amount of 3%, and 90% or more of pearlite is added to Sb in an amount of 5%.
Furthermore, when the pearlite inoculant is put into a steel ladle for use, the grain size of the pearlite inoculant is 4 mm.
Furthermore, when the pearlite inoculant is placed in a riser for use, the particle size of the pearlite inoculant is 0.5 mm.
Example 3
The formula of the pearlite inoculant comprises the following components in percentage by mass: si: 65%, Ba: 6%, Ca: 4%, Sb: 5 percent, and the balance of auxiliary materials;
the preparation method of the pearlite inoculant comprises the following steps: weighing the raw materials according to the proportion, and respectively putting the raw materials into a ball mill for grinding; uniformly mixing the ground raw materials, putting the mixture into a smelting furnace for smelting, heating to 1600 ℃, and smelting for 15min, wherein the raw materials are continuously stirred in the smelting process until the raw materials are uniformly mixed; after the raw materials are fully melted, the cast ingot is cooled and then crushed and granulated, and the granulation particle sizes are 0.7mm and 6mm respectively.
Furthermore, the amount of Sb added is related to the extent of pearlite: about 70% of pearlite is added to Sb in an amount of 3%, and 90% or more of pearlite is added to Sb in an amount of 5%.
Furthermore, when the pearlite inoculant is put into a steel ladle for use, the grain size of the pearlite inoculant is 6 mm.
Furthermore, when the pearlite inoculant is placed in a riser for use, the particle size of the pearlite inoculant is 0.7 mm.
Example 4
The formula of the pearlite inoculant comprises the following components in percentage by mass: si: 64%, Ba: 5.8%, Ca: 3.5%, Sb: 4.6 percent, and the balance of auxiliary materials;
the preparation method of the pearlite inoculant comprises the following steps: weighing the raw materials according to the proportion, and respectively putting the raw materials into a ball mill for grinding; uniformly mixing the ground raw materials, putting the mixture into a smelting furnace for smelting, heating to 1600 ℃, and smelting for 15min, wherein the raw materials are continuously stirred in the smelting process until the raw materials are uniformly mixed; after the raw materials are fully melted, the cast ingot is cooled and then crushed and granulated, and the granulation particle sizes are 0.4mm and 7mm respectively.
Furthermore, the amount of Sb added is related to the extent of pearlite: about 70% of pearlite is added to Sb in an amount of 3%, and 90% or more of pearlite is added to Sb in an amount of 5%.
Furthermore, when the pearlite inoculant is put into a steel ladle for use, the grain size of the pearlite inoculant is 7 mm.
Furthermore, when the pearlite inoculant is placed in a riser for use, the particle size of the pearlite inoculant is 0.4 mm.
The stability of pearlite during the graphitization of the ladle and the riser of the pearlite inoculants in inventive examples 1-4 was tested separately:
the pearlite inoculant disclosed by the invention is added with antimony, so that the increase of pearlite content can be promoted, and the pearlite content is stable in the graphitization process.
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 as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. The formula of the pearlite inoculant is characterized by comprising the following components in percentage by mass: si: 55-65%, Ba: 4-6%, Ca: 2-4%, Sb: 3-5% and the balance of auxiliary materials;
the preparation method of the pearlite inoculant comprises the following steps: weighing the raw materials according to the proportion, and respectively putting the raw materials into a ball mill for grinding; uniformly mixing the ground raw materials, putting the mixture into a smelting furnace for melting, heating to 1600 ℃, and smelting for 10-15min, wherein the raw materials are continuously stirred in the smelting process until the raw materials are uniformly mixed; after the raw materials are fully melted, the cast ingot is cooled and then crushed and granulated, and the granulation particle sizes are respectively within 1mm, 1-3mm and 4-8 mm.
2. The formulation of a pearlite inoculant according to claim 1, wherein the pearlite inoculant comprises the following components in percentage by mass: si: 57-63%, Ba: 4.5-5.5%, Ca: 2.5-3.5%, Sb: 3.5-4.5%, and the balance of auxiliary materials.
3. The formulation of a pearlite inoculant according to claim 1, wherein the pearlite inoculant comprises the following components in percentage by mass: si: 60%, Ba: 5%, Ca: 3%, Sb: 4 percent and the balance of auxiliary materials.
4. The formulation of pearlite inoculant according to claim 1, wherein the amount of Sb added is related to the extent of pearlite: about 70% of pearlite is added to Sb in an amount of 3%, and 90% or more of pearlite is added to Sb in an amount of 5%.
5. The formulation of a pearlite inoculant according to claim 1, wherein the particle size of the pearlite inoculant when placed in a ladle for use is 1-3mm or 4-8 mm.
6. The pearlite inoculant formulation according to claim 1, wherein the granule size of the pearlite inoculant is within 1mm when the pearlite inoculant is placed in a feeder for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210676763.2A CN115029495A (en) | 2022-06-15 | 2022-06-15 | Pearlite inoculant formula |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210676763.2A CN115029495A (en) | 2022-06-15 | 2022-06-15 | Pearlite inoculant formula |
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| CN115029495A true CN115029495A (en) | 2022-09-09 |
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| CN202210676763.2A Pending CN115029495A (en) | 2022-06-15 | 2022-06-15 | Pearlite inoculant formula |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115896604A (en) * | 2022-11-15 | 2023-04-04 | 宜昌佳晟鑫铁合金有限公司 | Silicon-based inoculant material proportioning method |
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| US20150284830A1 (en) * | 2012-11-14 | 2015-10-08 | Ferropem | Inoculant alloy for thick cast-iron parts |
| CN107829017A (en) * | 2017-11-24 | 2018-03-23 | 禹州市恒利来合金有限责任公司 | A kind of sulphur oxygen inovulant of high intensity |
| CN107937656A (en) * | 2017-12-13 | 2018-04-20 | 南京浦江合金材料股份有限公司 | A kind of inovulant and its preparation process for as cast condition production pearlitic ductile iron |
| CN110699509A (en) * | 2019-09-25 | 2020-01-17 | 安徽省含山县华平铸造厂（普通合伙） | Pearlite ductile iron inoculant |
| CN111742064A (en) * | 2017-12-29 | 2020-10-02 | 埃尔凯姆公司 | Cast iron inoculant and method for producing a cast iron inoculant |
| CN112159922A (en) * | 2020-09-19 | 2021-01-01 | 湖北新兴全力机械有限公司 | Gray cast iron inoculant and preparation method thereof |
-
2022
- 2022-06-15 CN CN202210676763.2A patent/CN115029495A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150284830A1 (en) * | 2012-11-14 | 2015-10-08 | Ferropem | Inoculant alloy for thick cast-iron parts |
| CN107829017A (en) * | 2017-11-24 | 2018-03-23 | 禹州市恒利来合金有限责任公司 | A kind of sulphur oxygen inovulant of high intensity |
| CN107937656A (en) * | 2017-12-13 | 2018-04-20 | 南京浦江合金材料股份有限公司 | A kind of inovulant and its preparation process for as cast condition production pearlitic ductile iron |
| CN111742064A (en) * | 2017-12-29 | 2020-10-02 | 埃尔凯姆公司 | Cast iron inoculant and method for producing a cast iron inoculant |
| CN110699509A (en) * | 2019-09-25 | 2020-01-17 | 安徽省含山县华平铸造厂（普通合伙） | Pearlite ductile iron inoculant |
| CN112159922A (en) * | 2020-09-19 | 2021-01-01 | 湖北新兴全力机械有限公司 | Gray cast iron inoculant and preparation method thereof |
Non-Patent Citations (1)
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| 苏华钦等: "铸铁凝固及其质量控制", 机械工业出版社, pages: 146 - 147 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115896604A (en) * | 2022-11-15 | 2023-04-04 | 宜昌佳晟鑫铁合金有限公司 | Silicon-based inoculant material proportioning method |
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