CN111318676A - High-speed steel die casting covering slag and preparation method thereof - Google Patents
High-speed steel die casting covering slag and preparation method thereof Download PDFInfo
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- CN111318676A CN111318676A CN201811521975.3A CN201811521975A CN111318676A CN 111318676 A CN111318676 A CN 111318676A CN 201811521975 A CN201811521975 A CN 201811521975A CN 111318676 A CN111318676 A CN 111318676A
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- speed steel
- steel die
- die 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
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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
- B22D7/00—Casting ingots, e.g. from ferrous metals
Abstract
The invention provides high-speed steel die casting covering slag which is prepared from the following raw materials in parts by weight: 60-80 parts of fly ash, 15-20 parts of mullite, 13-19 parts of glass slag, 20-24 parts of borax, 13-20 parts of carbon black, 13-18 parts of hollow ceramic microspheres, 16-22 parts of pitchstone, 18-23 parts of perlite, 5-12 parts of iron oxide, 7-15 parts of aluminum oxide and 10-14 parts of lithium oxide. The high-speed steel die casting protective slag prepared by the invention does not need to add a heating agent and a heat preservation agent, can improve the surface quality of steel ingots and the feeding quality of ingot heads, thereby reducing the head cutting rate and improving the yield.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to high-speed steel die casting covering slag.
Background
The high-speed steel is tool steel with high hardness, high wear resistance and high heat resistance, the existing special steel factories basically adopt tar wood frames, paraffinum rings and the like for protective casting, the surface quality of steel ingots is poor, particularly the defects of low-power subcutaneous bubbles, reverse skin, inclusion and the like, the existing adopted solid powdery protective slag is prepared by mixing graphite powder, water glass and fluorite, the surface quality of the cast steel can be effectively improved, but the solid powdery protective slag has low heat insulation performance, cannot quickly form a melting layer, and cannot achieve good spreadability.
Disclosure of Invention
In order to solve the technical problems, the invention provides high-speed steel die casting powder and a preparation method thereof, and aims to provide the high-speed steel die casting powder.
The invention provides high-speed steel die casting covering slag which is prepared from the following raw materials: fly ash, mullite, glass slag, borax, carbon black, hollow ceramic microspheres, pitchstone, perlite, ferric oxide, aluminum oxide and lithium oxide.
As a further improvement of the invention, the health-care food is prepared from the following raw materials in parts by weight: 60-80 parts of fly ash, 15-20 parts of mullite, 13-19 parts of glass slag, 20-24 parts of borax, 13-20 parts of carbon black, 13-18 parts of hollow ceramic microspheres, 16-22 parts of pitchstone, 18-23 parts of perlite, 5-12 parts of iron oxide, 7-15 parts of aluminum oxide and 10-14 parts of lithium oxide.
As a further improvement of the invention, the health-care food is prepared from the following raw materials in parts by weight: 64-76 parts of fly ash, 16-18 parts of mullite, 14-17 parts of glass slag, 20-23 parts of borax, 14-17 parts of carbon black, 14-17 parts of hollow ceramic microspheres, 18-21 parts of pitchstone, 19-20 parts of perlite, 7-10 parts of iron oxide, 9-14 parts of aluminum oxide and 11-14 parts of lithium oxide.
As a further improvement of the invention, the health-care food is prepared from the following raw materials in parts by weight: 68 parts of fly ash, 17 parts of mullite, 15 parts of glass slag, 21 parts of borax, 16 parts of carbon black, 15 parts of hollow ceramic microspheres, 19 parts of pitchstone, 19 parts of perlite, 8 parts of ferric oxide, 10 parts of aluminum oxide and 12 parts of lithium oxide.
As a further improvement of the invention, the health-care food is prepared from the following raw materials in parts by weight: 72 parts of fly ash, 17 parts of mullite, 16 parts of glass slag, 22 parts of borax, 16 parts of carbon black, 15 parts of hollow ceramic microspheres, 20 parts of pitchstone, 20 parts of perlite, 9 parts of ferric oxide, 13 parts of aluminum oxide and 13 parts of lithium oxide.
As a further improvement of the invention, expanded graphite is also added.
As a further improvement of the invention, the content of the expanded graphite is 12.5-15.7% by mass.
The invention further discloses a preparation method of the high-speed steel die casting covering slag, which comprises the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, cooling the powder, and packaging to obtain the finished product.
As a further improvement of the invention, the drying temperature is 135-150 ℃.
The invention has the following beneficial effects:
1. the main raw material of the invention is that the fly ash particles are more spherical and spongy, and after being melted, the fly ash particles are contracted into liquid drops under the action of surface tension, and the liquid drops are cooled to form beads, so that the fluidity is good, and a plurality of air holes are formed in the fly ash particles, thereby improving the heat insulation performance and the spreadability of the casting powder, and being beneficial to changing factory wastes into valuables and protecting the environment;
2. the added hollow ceramic microspheres have excellent fluidity, can reduce the viscosity of the casting powder, increase the fluidity and the heat-insulating property, have stable chemical properties and are not easy to decompose at high temperature;
3. the pitchstone and the perlite added in the invention have the excellent performances of light weight, heat preservation, heat insulation and fire prevention, and also have the advantages of no combustion, high strength, low water absorption, good blending property and long service life, the carbon content is low, the density is low, the perlite floats on the top of the liquid slag layer, does not directly contact molten steel, and does not cause recarburization of the molten steel;
4. the added expanded graphite is expanded at high temperature, so that the spreadability and heat preservation of the covering slag are improved;
5. the high-speed steel die casting protective slag prepared by the invention does not need to add a heating agent and a heat preservation agent, can improve the surface quality of steel ingots and the feeding quality of ingot heads, thereby reducing the head cutting rate and improving the yield.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the embodiments described are only some representative embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
The raw materials comprise the following components in parts by weight: 60 parts of fly ash, 15 parts of mullite, 13 parts of glass slag, 20 parts of borax, 13 parts of carbon black, 13 parts of hollow ceramic microspheres, 16 parts of pitchstone, 18 parts of perlite, 5 parts of ferric oxide, 7 parts of aluminum oxide and 10 parts of lithium oxide.
The preparation method of the high-speed steel die casting covering slag is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, wherein the drying temperature is 135 ℃, cooling the powder and packaging to obtain the finished product.
Example 2
The raw materials comprise the following components in parts by weight: 80 parts of fly ash, 20 parts of mullite, 19 parts of glass slag, 24 parts of borax, 20 parts of carbon black, 18 parts of hollow ceramic microspheres, 22 parts of pitchstone, 23 parts of perlite, 12 parts of ferric oxide, 15 parts of aluminum oxide and 14 parts of lithium oxide.
The preparation method of the high-speed steel die casting covering slag is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, drying at 150 ℃, cooling the powder, and packaging to obtain the finished product.
Example 3
The raw materials comprise the following components in parts by weight: 64 parts of fly ash, 16 parts of mullite, 14 parts of glass slag, 20 parts of borax, 14 parts of carbon black, 14 parts of hollow ceramic microspheres, 18 parts of pitchstone, 19 parts of perlite, 7 parts of ferric oxide, 9 parts of aluminum oxide and 11 parts of lithium oxide.
The preparation method of the high-speed steel die casting covering slag is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, drying at 140 ℃, cooling the powder, and packaging to obtain the finished product.
Example 4
The raw materials comprise the following components in parts by weight: 76 parts of fly ash, 18 parts of mullite, 17 parts of glass slag, 23 parts of borax, 17 parts of carbon black, 17 parts of hollow ceramic microspheres, 21 parts of pitchstone, 20 parts of perlite, 10 parts of ferric oxide, 14 parts of aluminum oxide and 14 parts of lithium oxide.
The preparation method of the high-speed steel die casting covering slag is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, wherein the drying temperature is 142 ℃, cooling the powder and packaging to obtain the finished product.
Example 5
The raw materials comprise the following components in parts by weight: 68 parts of fly ash, 17 parts of mullite, 15 parts of glass slag, 21 parts of borax, 16 parts of carbon black, 15 parts of hollow ceramic microspheres, 19 parts of pitchstone, 19 parts of perlite, 8 parts of ferric oxide, 10 parts of aluminum oxide and 12 parts of lithium oxide.
The preparation method of the high-speed steel die casting covering slag is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, drying at 145 ℃, cooling the powder, and packaging to obtain the finished product.
Example 6
The raw materials comprise the following components in parts by weight: 72 parts of fly ash, 17 parts of mullite, 16 parts of glass slag, 22 parts of borax, 16 parts of carbon black, 15 parts of hollow ceramic microspheres, 20 parts of pitchstone, 20 parts of perlite, 9 parts of ferric oxide, 13 parts of aluminum oxide and 13 parts of lithium oxide.
The preparation method of the high-speed steel die casting covering slag is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, wherein the drying temperature is 147 ℃, cooling the powder, and packaging to obtain the finished product.
Example 7
The raw materials comprise the following components in parts by weight: 68 parts of fly ash, 17 parts of mullite, 15 parts of glass slag, 21 parts of borax, 16 parts of carbon black, 15 parts of hollow ceramic microspheres, 19 parts of pitchstone, 19 parts of perlite, 8 parts of ferric oxide, 10 parts of aluminum oxide and 12 parts of lithium oxide.
Expanded graphite is also added, and the mass percent of the expanded graphite is 12.5%.
The preparation method of the high-speed steel die casting covering slag is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, wherein the drying temperature is 143 ℃, cooling the powder and packaging to obtain the finished product.
Example 8
The raw materials comprise the following components in parts by weight: 72 parts of fly ash, 17 parts of mullite, 16 parts of glass slag, 22 parts of borax, 16 parts of carbon black, 15 parts of hollow ceramic microspheres, 20 parts of pitchstone, 20 parts of perlite, 9 parts of ferric oxide, 13 parts of aluminum oxide and 13 parts of lithium oxide.
And expanded graphite is also added, and the mass percent of the expanded graphite is 15.7%.
The preparation method of the high-speed steel die casting covering slag is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, drying at 146 ℃, cooling the powder, and packaging to obtain the finished product.
Test example 1
The high-speed steel die casting mold powder of examples 1 to 8 of the present invention was subjected to physical property tests, and the results are shown in table 1.
TABLE 1
| Group of | Melting Point (. degree.C.) | Density (g/cm)3) | Water content (%) | Viscosity (poise) | Particle size, 60 mesh passage (%) |
| Example 1 | 1156 | 0.820 | 0.3 | 133 | 90 |
| Example 2 | 1150 | 0.811 | 0.3 | 131 | 91 |
| Example 3 | 1152 | 0.824 | 0.3 | 134 | 92 |
| Example 4 | 1155 | 0.805 | 0.3 | 132 | 92 |
| Example 5 | 1153 | 0.823 | 0.3 | 130 | 94 |
| Example 6 | 1156 | 0.833 | 0.3 | 127 | 94 |
| Example 7 | 1135 | 0.810 | 0.2 | 121 | 97 |
| Example 8 | 1132 | 0.812 | 0.2 | 120 | 96 |
Compared with the prior art, the main raw material of the invention is the fly ash particles which are mostly spherical and spongy, and the fly ash particles are contracted into liquid drops under the action of surface tension after being melted and cooled to form beads, so that the fluidity is good, a plurality of air holes are formed in the fly ash particles, the heat insulation performance and the spreadability of the casting powder are improved, and the fly ash protective agent is beneficial to changing factory wastes into valuables and protecting the environment; the added hollow ceramic microspheres have excellent fluidity, can reduce the viscosity of the casting powder, increase the fluidity and the heat-insulating property, have stable chemical properties and are not easy to decompose at high temperature; the pitchstone and the perlite added in the invention have the excellent performances of light weight, heat preservation, heat insulation and fire prevention, and also have the advantages of no combustion, high strength, low water absorption, good blending property and long service life, the carbon content is low, the density is low, the perlite floats on the top of the liquid slag layer, does not directly contact molten steel, and does not cause recarburization of the molten steel; the added expanded graphite is expanded at high temperature, so that the spreadability and heat preservation of the covering slag are improved; the high-speed steel die casting protective slag prepared by the invention does not need to add a heating agent and a heat preservation agent, can improve the surface quality of steel ingots and the feeding quality of ingot heads, thereby reducing the head cutting rate and improving the yield.
Various modifications may be made to the above without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is therefore intended to be limited not by the above description, but rather by the scope of the appended claims.
Claims (9)
1. The high-speed steel die casting covering slag is characterized by being prepared from the following raw materials: fly ash, mullite, glass slag, borax, carbon black, hollow ceramic microspheres, pitchstone, perlite, ferric oxide, aluminum oxide and lithium oxide.
2. The high-speed steel die casting covering slag according to claim 1, which is prepared from the following raw materials in parts by weight: 60-80 parts of fly ash, 15-20 parts of mullite, 13-19 parts of glass slag, 20-24 parts of borax, 13-20 parts of carbon black, 13-18 parts of hollow ceramic microspheres, 16-22 parts of pitchstone, 18-23 parts of perlite, 5-12 parts of iron oxide, 7-15 parts of aluminum oxide and 10-14 parts of lithium oxide.
3. The high-speed steel die casting covering slag according to claim 2, which is prepared from the following raw materials in parts by weight: 64-76 parts of fly ash, 16-18 parts of mullite, 14-17 parts of glass slag, 20-23 parts of borax, 14-17 parts of carbon black, 14-17 parts of hollow ceramic microspheres, 18-21 parts of pitchstone, 19-20 parts of perlite, 7-10 parts of iron oxide, 9-14 parts of aluminum oxide and 11-14 parts of lithium oxide.
4. The high-speed steel die casting covering slag according to claim 3, which is prepared from the following raw materials in parts by weight: 68 parts of fly ash, 17 parts of mullite, 15 parts of glass slag, 21 parts of borax, 16 parts of carbon black, 15 parts of hollow ceramic microspheres, 19 parts of pitchstone, 19 parts of perlite, 8 parts of ferric oxide, 10 parts of aluminum oxide and 12 parts of lithium oxide.
5. The high-speed steel die casting covering slag according to claim 2, which is prepared from the following raw materials in parts by weight: 72 parts of fly ash, 17 parts of mullite, 16 parts of glass slag, 22 parts of borax, 16 parts of carbon black, 15 parts of hollow ceramic microspheres, 20 parts of pitchstone, 20 parts of perlite, 9 parts of ferric oxide, 13 parts of aluminum oxide and 13 parts of lithium oxide.
6. The high-speed steel die-casting mold flux according to claim 1, wherein expanded graphite is further added.
7. The high-speed steel die-casting mold flux according to claim 1, wherein the expanded graphite is contained in an amount of 12.5 to 15.7% by mass.
8. The method for preparing high-speed steel die casting mold flux according to any one of claims 1 to 7, which is characterized by comprising the following steps: weighing the raw materials according to a certain proportion, uniformly mixing, ball-milling until the content of 150-mesh fine powder is more than 85%, drying until the moisture content is less than 1%, cooling the powder, and packaging to obtain the finished product.
9. The method as claimed in claim 8, wherein the drying temperature is 135-150 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811521975.3A CN111318676A (en) | 2018-12-13 | 2018-12-13 | High-speed steel die casting covering slag and preparation method thereof |
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| CN201811521975.3A CN111318676A (en) | 2018-12-13 | 2018-12-13 | High-speed steel die casting covering slag and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2734545A1 (en) * | 1977-07-30 | 1979-02-15 | Dacast Ges Fuer Huetten Und St | Casting powder added to molten metal esp. steel - via flat cardboard box contg. compartments for exothermic powder and fly ash |
| US5989729A (en) * | 1996-11-21 | 1999-11-23 | Aisin Seiki Kabushiki Kaisha | Wear resistant metal composite |
| CN101116906A (en) * | 2006-07-31 | 2008-02-06 | 宝山钢铁股份有限公司 | Carbon-free casting powder for casting steel making die |
| CN101927336A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Large extra thick plate blank and production method thereof |
| CN102825246A (en) * | 2012-07-31 | 2012-12-19 | 马鞍山科润冶金材料有限公司 | Covering slag for steelmaking die casting by using fly ash |
-
2018
- 2018-12-13 CN CN201811521975.3A patent/CN111318676A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2734545A1 (en) * | 1977-07-30 | 1979-02-15 | Dacast Ges Fuer Huetten Und St | Casting powder added to molten metal esp. steel - via flat cardboard box contg. compartments for exothermic powder and fly ash |
| US5989729A (en) * | 1996-11-21 | 1999-11-23 | Aisin Seiki Kabushiki Kaisha | Wear resistant metal composite |
| CN101116906A (en) * | 2006-07-31 | 2008-02-06 | 宝山钢铁股份有限公司 | Carbon-free casting powder for casting steel making die |
| CN101927336A (en) * | 2009-06-22 | 2010-12-29 | 鞍钢股份有限公司 | Large extra thick plate blank and production method thereof |
| CN102825246A (en) * | 2012-07-31 | 2012-12-19 | 马鞍山科润冶金材料有限公司 | Covering slag for steelmaking die casting by using fly ash |
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