CN114351039A - Vermicular graphite cast iron glass mold and preparation method thereof - Google Patents
Vermicular graphite cast iron glass mold and preparation method thereof Download PDFInfo
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Abstract
The application relates to the field of glass molds, and particularly discloses a vermicular cast iron glass mold and a preparation method thereof, wherein the vermicular cast iron glass mold comprises the following raw materials in percentage by weight: carbon: 2.8 to 3.0 percent; silicon: 3.1-3.2%; manganese: 0.25-0.35%; titanium: 0.06-0.08%; vanadium: 0.1 to 0.2 percent; a vermiculizer: 0.50-0.55%; the balance being iron. The preparation method comprises the following steps: the vermicular cast iron is formed by smelting a vermiculizer, iron, carbon, silicon, manganese, titanium and vanadium, has high toughness and surface smoothness and high heat resistance, can withstand high temperature for many times, and can prolong the service life when used as a glass mold.
Description
Technical Field
The application relates to the field of glass molds, in particular to a vermicular graphite cast iron glass mold and a preparation method thereof.
Background
Glass is an amorphous inorganic non-metallic material, and is generally made by using various inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash and the like) as main raw materials and adding a small amount of auxiliary raw materials, and the glass forming needs to cast high-temperature glass raw materials into a glass mold for forming.
The glass mold in the related art is made of stainless steel materials, and the stainless steel materials have the advantages of good hardness, smooth surface and the like. The surface of the glass is smooth, so that the requirement on the surface smoothness of the die cavity of the glass die is high during pouring, and meanwhile, the high temperature of the high-temperature glass material during pouring has a large influence on the glass die. In the related art, the stainless steel glass mold is reduced in toughness after being used at high temperature for many times, and is easy to generate thermal fatigue, so that the service life is short.
Disclosure of Invention
In order to prolong the service life of the glass mold, the application provides a vermicular graphite cast iron glass mold and a preparation method thereof. In a first aspect, the application provides a vermicular cast iron glass mold, which adopts the following technical scheme:
in a first aspect, the application provides a vermicular cast iron glass mold, which comprises the following raw materials in percentage by weight:
carbon: 2.8 to 3.0 percent; silicon: 3.1-3.2%; manganese: 0.25-0.35%; titanium: 0.06-0.08%; vanadium: 0.1 to 0.2 percent; a vermiculizer: 0.50-0.55%, and the balance of iron.
According to the technical scheme, iron, carbon, silicon, manganese, titanium and vanadium are melted according to a certain proportion, vermicular cast iron is formed under the vermicular action of a vermiculizer, the vermicular cast iron is convenient to form, the formed vermicular cast iron has high toughness and surface smoothness and high heat resistance, excellent mechanical properties can be maintained after the vermicular cast iron is subjected to high temperature for many times, and the service life of a die is effectively prolonged. The addition of vanadium effectively improves the wear resistance and the anti-explosion performance of the vermicular cast iron, and effectively improves the high temperature resistance of the vermicular cast iron.
Preferably, the weight percentage of the vanadium is 0.12-0.15%.
Preferably, the alloy further comprises molybdenum, and the weight percentage of the molybdenum is 0.30-0.40%.
According to the technical scheme, the molybdenum has high hardness, the hardness of the vermicular cast iron can be improved when the molybdenum is added into the vermicular cast iron, and meanwhile, the molybdenum has high heat conductivity, so that the heat conductivity of the prepared vermicular cast iron can be improved, the forming speed of a glass material after pouring is improved, the heating duration of a vermicular cast iron glass mold is also reduced, and the service life of the vermicular cast iron glass mold is further prolonged.
Preferably, the inoculant further comprises an inoculant, wherein the inoculant comprises a ferrosilicon inoculant and a silicon-barium inoculant, and the weight ratio of the ferrosilicon inoculant to the silicon-barium inoculant is 1: (2.5-3.2).
By adopting the technical scheme, the inoculant can promote carbon graphitization, improve the graphite form and distribution condition, increase the crystal grain number in the vermicular cast iron during crystallization, inhibit the crystal grain growth, play a role in refining the crystal grains and improve the uniformity of all parts of the vermicular cast iron.
Preferably, the sulfur-containing paint also comprises 0.20-0.03% of sulfur by weight.
Preferably, the fertilizer also comprises phosphorus, and the weight percentage of the phosphorus is 0.20-0.04%.
Preferably, the feed comprises the following raw materials in percentage by weight: carbon: 2.89%, silicon: 3.1%, manganese: 0.35%, titanium: 0.062%, molybdenum: 0.35%, vanadium: 0.13%, sulfur: 0.03%, phosphorus: 0.04%, vermiculizer: 0.55 percent and the balance of iron.
Preferably, the feed comprises the following raw materials in percentage by weight: carbon: 2.82%, silicon; 3.2% of manganese; 0.29%, titanium: 0.067%, molybdenum: 0.33%, vanadium: 0.12%, sulfur: 0.02%, phosphorus: 0.02%, vermiculizer: 0.53 percent, and the balance being iron.
Preferably, the feed comprises the following raw materials in percentage by weight: carbon: 3%, silicon: 3.14%, manganese: 0.25%, titanium: 0.08%, molybdenum: 0.39%, vanadium: 0.15%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5 percent, and the balance being iron.
Through the technical scheme, the weight proportion of the raw materials can achieve a better effect, and the vermicular cast iron glass mold with a long service life is obtained.
In a second aspect, the present application provides a method for preparing a vermicular cast iron glass mold, comprising the following steps:
smelting: firstly, adding a molybdenum-containing raw material and a vanadium-containing raw material, then adding a titanium-containing raw material, a carbon raw material, a silicon-containing raw material, a manganese-containing raw material, a titanium-containing raw material, a phosphorus-containing raw material, a sulfur-containing raw material and an iron-containing raw material, and smelting to form molten iron, wherein the smelting temperature is 1530-1545 ℃;
creeping inoculation: adding a vermiculizer into molten iron for vermicularizing treatment; the vermicularizing time is 5-10 minutes, and then an inoculant is added into the molten iron for inoculation, and the inoculation time is 5-10 minutes;
casting: and casting the inoculated molten iron into a mold at the casting temperature of 1430-1440 ℃, forming a glass mold after casting forming, taking the formed glass mold out of the mold, annealing, heating the glass mold to 955-958 ℃, preserving heat for 10 hours, cooling to 325-335 ℃ along with a furnace, discharging, and cooling to normal temperature in air.
By adopting the technical scheme, the method enhances the toughness and the heat conduction performance of the vermicular cast iron through vermicularization and inoculation, and prolongs the service life of the vermicular cast iron glass mold.
In summary, the present application has the following beneficial effects:
1. according to the method, the vermicular cast iron is formed by smelting a vermiculizer, iron, carbon, silicon, manganese, titanium and vanadium, the vermicular cast iron has high toughness and surface smoothness and high heat resistance, can withstand high temperature for many times, and can prolong the service life when used as a glass mold, and the heat resistance of the vermicular cast iron is improved by adding the vanadium, so that the service life of the vermicular cast iron is further prolonged.
2. In this application, molybdenum is preferably adopted to be added into vermicular cast iron, and the molybdenum has good thermal conductivity and can improve the thermal conductivity of the prepared vermicular cast iron, so that the forming speed of glass materials after pouring is improved, the heating duration of the vermicular cast iron glass mold during single glass pouring is also reduced, and the service life of the vermicular cast iron glass mold is further prolonged.
3. According to the method, the toughness and the heat conduction performance of the vermicular cast iron are improved in the vermicular and inoculation processes, so that the cast vermicular cast iron glass mold is not easy to deform at high temperature for many times, and has a long service life.
Detailed Description
The raw material sources are as follows: the ferrosilicon inoculant in the embodiment of the application is purchased from Antang Jincheng metallurgy materials GmbH; the vermiculizer in the embodiment of the application is purchased from the metallurgical refractory company of Fenglan, Anyang; silicon barium inoculant in the examples of the present application Anyang Corz Metal products Ltd; the sulfur block in the examples of this application was purchased from Sichuan high purity materials science and technology, Inc.
Examples
Example 1
Smelting: mixing and smelting a ferromolybdenum intermediate alloy with the molybdenum content of 4wt% and a ferrovanadium intermediate alloy with the vanadium content of 5wt%, then adding a ferrotitanium intermediate alloy with the titanium content of 3wt%, graphite powder, a ferrosilicon intermediate alloy with the silicon content of 10wt%, a ferrophosphorus intermediate alloy with the phosphorus content of 2wt% and sulfur blocks, smelting to form molten iron, and slagging off, wherein the smelting temperature is maintained at 1530 ℃;
creeping inoculation: adding a vermiculizer into molten iron for vermicularizing treatment; the creeping time is 10 minutes, then an inoculant is added into molten iron for inoculation, the weight ratio of a ferrosilicon inoculant to a silicon barium inoculant in the inoculant is 1:2.5, the inoculation time is 10 minutes, inoculated molten iron is formed, and all elements in the inoculated molten iron account for carbon in percentage by weight: 2.89%, silicon: 3.1%, manganese: 0.35%, titanium: 0.062%, molybdenum: 0.35%, vanadium: 0.13%, sulfur: 0.03%, phosphorus: 0.04%, vermiculizer: 0.55%, barium: 0.13% and the balance iron.
Casting: and casting the inoculated molten iron into a mold at a casting temperature of 1430, forming a glass mold after casting molding, taking the molded glass mold out of the mold, annealing, heating the glass mold to 955 ℃, preserving heat for 10 hours, cooling to 325 ℃ along with the furnace, discharging, and cooling to normal temperature in air.
Example 2
Smelting: mixing and smelting a ferromolybdenum intermediate alloy with the molybdenum content of 4wt% and a ferrovanadium intermediate alloy with the vanadium content of 5wt%, then adding a ferrotitanium intermediate alloy with the titanium content of 3wt%, graphite powder, a ferrosilicon intermediate alloy with the silicon content of 10wt%, a ferrophosphorus intermediate alloy with the phosphorus content of 2wt% and a sulfur block, smelting to form molten iron, and slagging off, wherein the smelting temperature is kept at 1540 ℃;
creeping inoculation: adding a vermiculizer into molten iron for vermicularizing treatment; the creeping time is 10 minutes, then an inoculant is added into molten iron for inoculation, the weight ratio of a ferrosilicon inoculant to a silicon barium inoculant in the inoculant is 1:2.9, the inoculation time is 10 minutes, inoculated molten iron is formed, and all elements in the inoculated molten iron account for carbon in percentage by weight: 2.82%, silicon: 3.2%, manganese: 0.29%, titanium: 0.067%, molybdenum: 0.33%, vanadium: 0.12%, sulfur: 0.02%, phosphorus: 0.02%, vermiculizer: 0.53%, barium: 0.15% and the balance of iron.
Casting: and casting the inoculated molten iron into a mold at the casting temperature of 1435, forming a glass mold after casting forming, taking the formed glass mold out of the mold, annealing, heating the glass mold to 956 ℃, preserving heat for 10 hours, cooling to 330 ℃ along with the furnace, discharging, and cooling to normal temperature in air.
Example 3
Smelting: mixing and smelting a ferromolybdenum intermediate alloy with the molybdenum content of 4wt% and a ferrovanadium intermediate alloy with the vanadium content of 5wt%, then adding a ferrotitanium intermediate alloy with the titanium content of 3wt%, graphite powder, a ferrosilicon intermediate alloy with the silicon content of 10wt%, a ferrophosphorus intermediate alloy with the phosphorus content of 2wt% and a sulfur block, smelting to form molten iron, and slagging off, wherein the smelting temperature is kept to be 1545 ℃;
creeping inoculation: adding a vermiculizer into molten iron for vermicularizing treatment; the creeping time is 5-10 minutes, then an inoculant is added into molten iron for inoculation, the weight ratio of a ferrosilicon inoculant to a silicon barium inoculant in the inoculant is 1:3.2, the inoculation time is 5-10 minutes, inoculated molten iron is formed, and all elements in the inoculated molten iron account for carbon in percentage by weight: 3%, silicon: 3.14%, manganese: 0.25%, titanium: 0.08%, molybdenum: 0.39%, vanadium: 0.15%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5%, barium: 0.18 percent and the balance of iron.
Casting: and (3) casting the inoculated molten iron into a mold at the casting temperature of 1440 ℃ to form a glass mold after casting forming, taking the formed glass mold out of the mold, annealing, heating the glass mold to 958 ℃, preserving heat for 10 hours, cooling to 335 ℃ along with the furnace, discharging, and cooling to normal temperature in air.
Example 4
Example 4 differs from example 3 only in the weight percentages of vanadium and iron, the weight percentages of the elements in example 4 being carbon: 3%, silicon: 3.14%, manganese: 0.25%, titanium: 0.08%, molybdenum: 0.39%, vanadium: 0.1%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5%, barium: 0.18 percent and the balance of iron.
Example 5
Example 5 differs from example 3 only in the weight percentages of vanadium and iron, the weight percentages of the elements in example 5 being carbon: 3%, silicon: 3.14%, manganese: 0.25%, titanium: 0.08%, molybdenum: 0.39%, vanadium: 0.2%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5%, barium: 0.18 percent and the balance of iron.
Example 6
Example 6 differs from example 3 only in the weight percentages of molybdenum and iron, the weight percentages of the elements in example 6 being carbon: 3%, silicon: 3.14%, manganese: 0.25%, titanium: 0.08%, molybdenum: 0.3%, vanadium: 0.15%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5%, barium: 0.18 percent and the balance of iron.
Example 7
Example 7 differs from example 3 only in the weight percentages of molybdenum and iron, the weight percentages of the elements in example 7 being carbon: 3%, silicon: 3.14%, manganese: 0.25%, titanium: 0.08%, molybdenum: 0.4%, vanadium: 0.15%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5%, barium: 0.18 percent and the balance of iron.
Example 8
Example 8 differs from example 3 only in that the weight percentages of carbon and iron are different, and in example 8 the weight percentages of the elements are carbon: 2.8%, silicon: 3.14%, manganese: 0.25%, titanium: 0.08%, molybdenum: 0.39%, vanadium: 0.15%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5%, barium: 0.18 percent and the balance of iron.
Example 9
Example 9 differs from example 3 only in the weight percentages of titanium and iron, the weight percentages of the elements in example 9 being carbon: 3%, silicon: 3.14%, manganese: 0.25%, titanium: 0.06%, molybdenum: 0.39%, vanadium: 0.15%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5%, barium: 0.18 percent and the balance of iron.
Example 10
Example 10 differs from example 3 only in that the creep time in example 10 was 5 minutes.
Example 11
Example 11 differs from example 3 only in that the creep time in example 11 was 8 minutes.
Example 12
Example 12 differs from example 3 only in that the incubation time in example 12 is 5 minutes.
Example 13
Example 13 differs from example 3 only in that the incubation time in example 12 is 8 minutes.
Comparative example
Comparative example 1
Comparative example 1 differs from example 3 only in that no vermicular agent was added to comparative example 1.
Comparative example 2
Comparative example 2 differs from example 3 only in that the weight percentage of the vermicular agent in comparative example 2 is 0.1%.
Comparative example 3
Comparative example 3 differs from example 3 only in that no vanadium was added in comparative example 3.
Performance test
Detection method/test method
1. The tensile strength of the glass molds prepared in the examples and comparative examples was measured by GB/T228.1-2010 "metallic Material Room temperature tensile test method", and recorded as data A.
2. The tensile strength of the glass molds prepared in the respective examples and comparative examples was measured by GB/T228.1-2010 "metallic Material Room temperature tensile test method" after 10 ten thousand uses and recorded as data B.
3. The number of uses at the time of scrapping of the glass molds prepared in each example and each comparative example was measured and recorded as data C.
Results and analysis of results
Table 1: experimental data for each example and each comparative example
By combining the examples 1 to 13, the comparative examples 1 to 3 and the table 1, the glass mold made of the vermicular cast iron is prepared by mixing and smelting carbon, silicon, manganese, titanium, molybdenum, vanadium, sulfur, phosphorus, barium and iron according to a specific proportion and adding a vermiculizer during smelting, and the prepared glass mold has high toughness and wear resistance, and after more than ten thousand times of use, the performance of the glass mold is reduced to a small extent, the number of use times reaches more than ninety thousand times, and the service life of the glass mold is greatly prolonged.
By combining the examples 3-5 and the table 1, the addition of vanadium can improve the toughness, strength, high temperature resistance and wear resistance of the glass mold, and when the vanadium accounts for 0.12-0.15% of the weight of the glass mold, the vanadium has a higher improvement on the heat resistance of the glass mold, and the service life of the glass mold is effectively prolonged.
By combining the embodiments 1 to 3 and the embodiments 12 to 13, the addition of the inoculant can improve the graphite form and distribution condition, increase the crystal grain number in the vermicular cast iron during crystallization, inhibit the growth of crystal grains in the vermicular cast iron, play a role in refining the crystal grains, improve the uniformity of all parts of the vermicular cast iron and further improve the service life of the glass mold. And the inoculation time has great influence on the performance of the vermicular cast iron, and the glass mold with better performance can be prepared when the inoculation time is 10 minutes.
By combining the embodiments 1 to 3 and the embodiments 6 to 7, molybdenum has better thermal conductivity, and the vermicular graphite cast iron containing molybdenum has stronger thermal conductivity, so that the forming speed of the glass material after casting is improved, the heating time of the glass mold is also reduced, and meanwhile, the molybdenum with stronger hardness can also improve the hardness of the glass mold.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The vermicular cast iron glass mold is characterized by comprising the following raw materials in percentage by weight:
carbon: 2.8 to 3.0 percent; silicon: 3.1-3.2%; manganese: 0.25-0.35%; titanium: 0.06-0.08%; vanadium: 0.1 to 0.2 percent; a vermiculizer: 0.50-0.55%; the balance being iron.
2. The vermicular cast iron glass mold according to claim 1, wherein: the weight percentage of the vanadium is 0.12-0.15%.
3. The vermicular cast iron glass mold according to claim 1, wherein: the alloy also comprises molybdenum, wherein the weight percentage of the molybdenum is 0.30-0.40%.
4. The vermicular cast iron glass mold according to claim 1, wherein: still include the inoculant, the inoculant includes ferrosilicon inoculant and silicon barium inoculant, the weight ratio of ferrosilicon inoculant and silicon barium inoculant is 1: (2.5-3.2).
5. The vermicular cast iron glass mold according to claim 1, wherein: also comprises sulfur, and the weight percentage of the sulfur is 0.20-0.03%.
6. The vermicular cast iron glass mold according to claim 1, wherein: also comprises phosphorus, and the weight percentage of the phosphorus is 0.20-0.04%.
7. The vermicular cast iron glass mold according to claim 1, wherein: comprises the following raw materials in percentage by weight: carbon: 2.89%, silicon: 3.1%, manganese: 0.35%, titanium: 0.062%, molybdenum: 0.35%, vanadium: 0.13%, sulfur: 0.03%, phosphorus: 0.04%, vermiculizer: 0.55 percent and the balance of iron.
8. The vermicular cast iron glass mold according to claim 1, wherein: comprises the following raw materials in percentage by weight: carbon: 2.82%, silicon: 3.2%, manganese: 0.29%, titanium: 0.067%, molybdenum: 0.33%, vanadium: 0.12%, sulfur: 0.02%, phosphorus: 0.02%, vermiculizer: 0.53 percent, and the balance being iron.
9. The vermicular cast iron glass mold according to claim 1, wherein: comprises the following raw materials in percentage by weight: carbon: 3%, silicon: 3.14%, manganese: 0.25%, titanium: 0.08%, molybdenum: 0.39%, vanadium: 0.15%, sulfur: 0.03%, phosphorus: 0.03%, vermiculizer: 0.5 percent, and the balance being iron.
10. The method for preparing a vermicular cast iron glass mold according to any one of claims 1 to 9, wherein the method comprises the following steps: the method comprises the following steps:
smelting: firstly, adding a molybdenum-containing raw material and a vanadium-containing raw material, then adding a titanium-containing raw material, a carbon raw material, a silicon-containing raw material, a manganese-containing raw material, a titanium-containing raw material, a phosphorus-containing raw material, a sulfur-containing raw material and an iron-containing raw material, and smelting to form molten iron, wherein the smelting temperature is 1530-1545 ℃;
creeping inoculation: adding a vermiculizer into molten iron for vermicularizing treatment; the vermicularizing time is 5-10 minutes, and then an inoculant is added into the molten iron for inoculation, and the inoculation time is 5-10 minutes;
casting: and casting the inoculated molten iron into a mold at the casting temperature of 1430-1440 ℃, forming a glass mold after casting forming, taking the formed glass mold out of the mold, annealing, heating the glass mold to 955-958 ℃, preserving heat for 10 hours, cooling to 325-335 ℃ along with a furnace, discharging, and cooling to normal temperature in air.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114752844A (en) * | 2022-04-21 | 2022-07-15 | 常熟市精工模具制造有限公司 | Low-alloy medium-silicon vermicular graphite cast iron glass mold material and preparation method thereof |
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| CN105441783A (en) * | 2015-04-22 | 2016-03-30 | 常熟市永祥机电有限公司 | Alloy vermicular graphite cast iron glass mold material |
| CN107447158A (en) * | 2017-07-17 | 2017-12-08 | 常熟市精工模具制造有限公司 | The preparation method of high alloy black vermicular cast iron glass mold material |
| CN110079727A (en) * | 2019-06-12 | 2019-08-02 | 成都新志实业有限公司 | One kind is resistance to hanker chromium vermicular cast iron glass mold material and preparation method thereof |
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| CN85107725A (en) * | 1985-10-17 | 1986-07-23 | 陕西机械学院 | Make the vermicular cast iron of mould for glass bottle |
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| CN107447158A (en) * | 2017-07-17 | 2017-12-08 | 常熟市精工模具制造有限公司 | The preparation method of high alloy black vermicular cast iron glass mold material |
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| CN114752844A (en) * | 2022-04-21 | 2022-07-15 | 常熟市精工模具制造有限公司 | Low-alloy medium-silicon vermicular graphite cast iron glass mold material and preparation method thereof |
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Application publication date: 20220415 |