CN114147181A - Double-furnace casting method - Google Patents
Double-furnace casting method Download PDFInfo
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- CN114147181A CN114147181A CN202111226344.0A CN202111226344A CN114147181A CN 114147181 A CN114147181 A CN 114147181A CN 202111226344 A CN202111226344 A CN 202111226344A CN 114147181 A CN114147181 A CN 114147181A
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- casting
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- furnace
- molten steel
- temperature
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- 238000005266 casting Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 238000003723 Smelting Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 2
- 230000003031 feeding effect Effects 0.000 abstract description 5
- 230000035553 feeding performance Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a double-furnace casting method, which comprises the following steps: s1: respectively putting the steel into a low-temperature smelting furnace and a high-temperature smelting furnace for smelting treatment; s2: casting for the first time, wherein a casting opening is selected at a place with a small corresponding product heat section; s3: and (4) secondary casting, namely, replacing the casting opening with the other casting opening corresponding to the product with larger heat section for casting. According to the double-furnace casting method, the feeding performance of molten steel in the riser can be prevented from being deteriorated through twice casting, the yield of a product is improved, the material yield of the product is low, the pouring cup opening with a smaller heat section of the product is selected for the first casting, when the molten steel enters the product, the product area at the lower part of the pouring cup can be washed, the heat section equivalent at the position can be properly increased, but the heat section is smaller because the position with the smaller heat section is selected, the influence is not obvious, the secondary casting adopts higher molten steel temperature, because the part of the molten steel is poured in the riser, the heat section equivalent at the riser is increased, and the feeding effect of the molten steel in the riser is enhanced.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a double-furnace casting method.
Background
The casting method is that gold and silver are melted into liquid state, and the casting is made into ware by adopting a master mould, while the precise casting of silica sol process and water glass process adopts the method that molten steel in the same furnace is poured into the same pouring cup, and after a large casting is cooled for a few minutes, a feeder head is subjected to primary supplementary casting. The defects are that the temperature of the molten steel poured into a product is higher than that of the molten steel poured into a riser during casting because the molten steel in a ladle is cooled during casting, so that the feeding performance of the molten steel in the riser is poor, and the riser needs to be enlarged to improve the feeding performance, so that the product yield is low, the production efficiency is low, the production cost is high, and the competitiveness is poor.
Disclosure of Invention
The present invention is directed to a twin-furnace casting method to solve the problems of the prior art in use.
In order to achieve the purpose, the invention provides the following technical scheme: a dual furnace casting method, comprising the steps of:
s1: respectively putting the steel into a low-temperature smelting furnace and a high-temperature smelting furnace for smelting treatment;
s2: casting for the first time, wherein a casting opening is selected at a place with a small corresponding product heat section;
s3: and (4) secondary casting, namely, replacing the casting opening with the other casting opening corresponding to the product with larger heat section for casting.
Preferably, in the step S1, the temperature of the low temperature furnace is 1560-1590 ℃, and the temperature of the high temperature furnace is 1620-1650 ℃.
Preferably, in the step S2, the product is cast and molded at the molten steel temperature of 1560-.
Preferably, in step S2, the amount of molten steel for the first casting is about one tenth to one fifth of the amount of molten steel poured into the riser after the product is completely poured, so as to prevent the liquid level of the product from dropping to form a cold insulation layer near the product casting riser after the product is cooled, and the riser with a smaller product heat section is selected for the first casting.
Preferably, in the step S3, the secondary casting is performed at a higher molten steel temperature, and the secondary casting opening is selected at a place where the product thermal saving is large.
Preferably, in the step S3, the upper casting feeding system is fully cast at the molten steel temperature of 1620-1650 ℃.
Compared with the prior art, the invention has the beneficial effects that: the double-furnace casting method comprises the following steps:
the feeding performance of the molten steel in the riser can be prevented from being deteriorated through twice casting, the product yield is improved, the material yield is low, the pouring cup mouth at the position with a small heat section of the product is selected for the first casting, the molten steel can scour the product area at the lower part of the pouring cup when entering the product, the heat section equivalent at the position can be properly increased, but the influence is not obvious because the position with the small heat section is selected, the secondary casting adopts higher molten steel temperature, because part of the molten steel is poured in the riser, the heat section equivalent at the position of the riser is increased, the feeding effect of the molten steel in the riser is enhanced, the secondary casting mouth is selected at the position with a large heat section of the product, because the molten steel temperature of the pouring mouth is highest due to scouring, the heat section equivalent at the position can be increased, the riser has better feeding effect, the problem of shrinkage cavity in the product is reduced, the product yield is improved, the production efficiency is improved, the production cost is reduced, the competitiveness is improved.
Drawings
FIG. 1 is a flow chart of the steps of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a dual furnace casting method, comprising the steps of:
s1: respectively putting the steel into a low-temperature smelting furnace and a high-temperature smelting furnace for smelting treatment;
the temperature of the low-temperature smelting furnace is 1560-;
s2: casting for the first time, wherein a casting opening is selected at a place with a small corresponding product heat section;
casting and molding the product at the molten steel temperature of 1560 and 1590 ℃;
the lower molten steel temperature is adopted during the first casting of the product, so that the required feeding metal amount is reduced while the product molding is ensured, and a casting feeding system can be designed to be smaller than normal;
the amount of molten steel for the first casting is about one tenth to one fifth of that of a riser after a product is fully cast, so that a cold interlayer is prevented from being formed by the liquid level of the product falling near the product casting head after the product is cooled, and in addition, the riser with a smaller product heat section is selected for the first casting, when the molten steel enters the product, the product area at the lower part of a pouring cup is scoured, the heat section equivalent at the position can be properly increased, but the influence is not obvious because the molten steel is selected at the position with the smaller heat section, so that the heat section is smaller;
s3: secondary casting, namely, changing to another casting opening corresponding to the product with larger heat section for casting;
in the step S3, the secondary casting adopts higher molten steel temperature, and a secondary casting opening is selected at a place with larger product heat conservation; the secondary casting adopts higher molten steel temperature, because the molten steel is poured into the riser, the heat-saving equivalent of the riser is increased, and the feeding effect of the molten steel in the riser is enhanced
In the step S3, the upper casting feeding system is fully cast at the molten steel temperature of 1620-1650 ℃; the secondary casting opening is selected at a place with a larger heat section of a product, and the temperature of molten steel at the casting opening is highest due to scouring, so that the heat section equivalent at the place can be increased, the riser has a better feeding effect, and the problem of shrinkage cavity in the product is solved.
Wherein, the first and the second pouring adopt two molten steel melting furnaces to operate simultaneously according to different molten steel temperatures;
the time between the first casting and the second casting is shorter, and is less than 2 minutes, so that the cold separation layer formed by the falling of the liquid level of the molten steel caused by too much cooling of the product is avoided.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. A double-furnace casting method is characterized in that: the double-furnace casting method comprises the following steps:
s1: respectively putting the steel into a low-temperature smelting furnace and a high-temperature smelting furnace for smelting treatment;
s2: casting for the first time, wherein a casting opening is selected at a place with a small corresponding product heat section;
s3: and (4) secondary casting, namely, replacing the casting opening with the other casting opening corresponding to the product with larger heat section for casting.
2. The twin-furnace casting method according to claim 1, characterized in that: in step S1, the low temperature furnace temperature is 1560-1590 ℃, and the high temperature furnace temperature is 1620-1650 ℃.
3. The twin-furnace casting method according to claim 1, characterized in that: in the step S2, the product is cast and molded at the molten steel temperature of 1560-1590 ℃.
4. The twin-furnace casting method according to claim 1, characterized in that: in the step S2, the amount of molten steel is poured into the riser about one tenth to one fifth after the product is completely poured, so as to prevent the liquid level of the product from dropping to form a cold insulation layer near the product casting head after the product is cooled, and the riser at the position with a smaller heat section of the product is selected for the first casting.
5. The twin-furnace casting method according to claim 1, characterized in that: in the step S3, the secondary casting adopts higher molten steel temperature, and the secondary casting opening is selected at a place with larger product heat conservation.
6. The twin-furnace casting method according to claim 5, characterized in that: in the step S3, the upper casting feeding system is fully cast at the molten steel temperature of 1620-1650 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111226344.0A CN114147181B (en) | 2021-10-21 | 2021-10-21 | Double-furnace casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111226344.0A CN114147181B (en) | 2021-10-21 | 2021-10-21 | Double-furnace casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114147181A true CN114147181A (en) | 2022-03-08 |
| CN114147181B CN114147181B (en) | 2023-12-29 |
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| CN202111226344.0A Active CN114147181B (en) | 2021-10-21 | 2021-10-21 | Double-furnace casting method |
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Citations (15)
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| CA1182618A (en) * | 1980-10-22 | 1985-02-19 | Robert W. Hazelett | Steam preheating the endless flexible casting belt in a continuous casting machine |
| CN1644274A (en) * | 2005-02-03 | 2005-07-27 | 王惠臣 | Continuous double-metal cast forming method |
| CN101554658A (en) * | 2008-04-09 | 2009-10-14 | 浙江万丰科技开发有限公司 | Feeding technology for gravity casting center casting |
| CN102350485A (en) * | 2011-10-05 | 2012-02-15 | 襄樊市鹏荣刀具制造有限公司 | Device and process for repairing shrinkage holes during steel billet casting through intermediate-frequency electric heating |
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| CN102699284A (en) * | 2012-05-21 | 2012-10-03 | 杭州中强轧辊有限公司 | Rapid casting process of rollers by common method |
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| CN104338909A (en) * | 2014-09-28 | 2015-02-11 | 福建丰力机械科技有限公司 | Wheel hub casting molding process |
| JP2015028132A (en) * | 2013-06-27 | 2015-02-12 | 三菱電機株式会社 | Epoxy resin composition for cast molding, mold product for high voltage equipment using the same and manufacturing method thereof |
| CN105436413A (en) * | 2015-11-27 | 2016-03-30 | 洛阳古城机械有限公司 | Automobile steering knuckle transversely-placing casting technology |
| WO2018039858A1 (en) * | 2016-08-29 | 2018-03-08 | 丁洋 | Casting technology for planet carrier |
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| CN209849825U (en) * | 2019-04-30 | 2019-12-27 | 山西汉通鑫宇科技股份有限公司 | Feeding device for casting independent heat section |
| CN110919818A (en) * | 2019-11-29 | 2020-03-27 | 王海江 | Low-temperature forming method for semi-solid slurry for producing casting head system |
| WO2023093131A1 (en) * | 2021-11-25 | 2023-06-01 | 江苏亨通电力特种导线有限公司 | Super-heat-resistant aluminum alloy wire and preparation method therefor |
-
2021
- 2021-10-21 CN CN202111226344.0A patent/CN114147181B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1182618A (en) * | 1980-10-22 | 1985-02-19 | Robert W. Hazelett | Steam preheating the endless flexible casting belt in a continuous casting machine |
| CN1644274A (en) * | 2005-02-03 | 2005-07-27 | 王惠臣 | Continuous double-metal cast forming method |
| CN101554658A (en) * | 2008-04-09 | 2009-10-14 | 浙江万丰科技开发有限公司 | Feeding technology for gravity casting center casting |
| CN102350485A (en) * | 2011-10-05 | 2012-02-15 | 襄樊市鹏荣刀具制造有限公司 | Device and process for repairing shrinkage holes during steel billet casting through intermediate-frequency electric heating |
| CN102380598A (en) * | 2011-11-02 | 2012-03-21 | 张立庆 | Manufacturing process of piston of hydraulic cylinder |
| CN102699284A (en) * | 2012-05-21 | 2012-10-03 | 杭州中强轧辊有限公司 | Rapid casting process of rollers by common method |
| CN103849819A (en) * | 2012-12-04 | 2014-06-11 | 上海梅山钢铁股份有限公司 | Grate bar material and production method thereof as well as combined pouring unit of sintering machine |
| JP2015028132A (en) * | 2013-06-27 | 2015-02-12 | 三菱電機株式会社 | Epoxy resin composition for cast molding, mold product for high voltage equipment using the same and manufacturing method thereof |
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| CN109468522A (en) * | 2018-12-26 | 2019-03-15 | 无锡市优工精密阀门有限公司 | The full form casting process of super-duplex stainless steel pump case |
| CN209849825U (en) * | 2019-04-30 | 2019-12-27 | 山西汉通鑫宇科技股份有限公司 | Feeding device for casting independent heat section |
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| Publication number | Publication date |
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| CN114147181B (en) | 2023-12-29 |
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