CN111004939A - Molten aluminum deslagging method for 2014 aluminum alloy aviation precision hub die forging ingot casting - Google Patents
Molten aluminum deslagging method for 2014 aluminum alloy aviation precision hub die forging ingot casting Download PDFInfo
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- CN111004939A CN111004939A CN201911380440.3A CN201911380440A CN111004939A CN 111004939 A CN111004939 A CN 111004939A CN 201911380440 A CN201911380440 A CN 201911380440A CN 111004939 A CN111004939 A CN 111004939A
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- slag
- aluminum
- deslagging
- molten aluminum
- die forging
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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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
- B22D1/002—Treatment with gases
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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
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/001—Retaining slag during pouring molten metal
- B22D43/004—Retaining slag during pouring molten metal by using filtering means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a method for removing slag of molten aluminum for casting ingots of 2014 aluminum alloy aviation precision hub die forgings, which comprises three-stage slag removal, wherein the first-stage slag removal is in-furnace refining, and oxidizing slag can generate adsorption with a refining agent or inert gas in the refining process, so that the oxidizing slag is brought into the surface layer of the molten aluminum for removal; the second-stage deslagging is online degassing, and oxidizing slag in the aluminum liquid floats upwards to the surface of the aluminum liquid along with hydrogen in the degassing process to perform deslagging; and the third-season deslagging is realized by adopting a filtering plate for filtering on line, and the large granular slag is blocked by the filtering plate. Meanwhile, the molten aluminum is subjected to dehydrogenation and deslagging, so that the final hydrogen content in the melt is reduced to the minimum level, preparation is made for obtaining a compact ingot casting structure, the molten aluminum is separated from oxidation slag in the degassing treatment process, and the original slag content in the melt is reduced to a great extent through multi-stage pretreatment. Thereby improving the product quality.
Description
Technical Field
The invention relates to the technical field of manufacturing of aviation precision hub die forgings, in particular to a molten aluminum deslagging method for 2014 aluminum alloy aviation precision hub die forgings cast ingots.
Background
The large airplane is provided with a typical-specification forge piece which is the largest forge piece in the 2014-high aluminum alloy aviation precision hub die forge piece: and die forging of half wheel (inboard). The half-wheel (inboard) die forging is a precision die forging and is a disc die forging, the maximum outer hub size of a part is phi 593.3 multiplied by 309.1mm, and the maximum outer contour size of the die forging is phi 616.5 multiplied by 314.2 mm.
The parts inside the half wheel cabin are shown in fig. 1 and fig. 2, and fig. 1 is a first side view structure schematic diagram of the 2014 aluminum alloy aviation precision hub die forging provided by the embodiment of the invention; fig. 2 is a schematic side view of a 2014 aluminum alloy aviation precision hub die forging, which is a relatively complex large aluminum alloy forging, the maximum external dimension of the forging is phi 600mm × 310mm, the maximum depth of the cylinder is 240mm, the minimum position of the cylinder wall is only 7.6mm, and the maximum position of the cylinder wall is 16mm, and the forging is a typical deep-cylinder thin-wall part, the basic body of which is a cylinder 12, the upper part of the cylinder 12 is provided with an annular outward extension part 11, an inner concave part is arranged above the outward extension part 11, 9 lugs 14 arranged in an annular manner are arranged at the junction of the inner concave part and the inner wall of the cylinder 12, and the bottom of the cylinder 12 is provided with 9 annular elliptical pits 13, specifically, the part is thin at the bottom of the cylinder, and has 9 uniformly distributed elliptical pits 13 at the same time, and the shape is complex; the upper side of the part is correspondingly provided with 9 lugs 14, and the lugs 14 are high in height, thin in wall thickness, small in inclination and small in vertical projection area, and belong to parts which are difficult to form and easy to have defects.
The half-wheel (inboard) die forging is a precision die forging, namely a disc die forging, and has the advantages of deep cavity, thin wall, high rib, small fillet, more bosses at the inner cavity and the bottom and more complex cavity. The half-wheel (inboard) die forging has a large number of non-machined surfaces, small machining allowance, high surface quality requirement and extremely high dimensional precision requirement; the die forging has deep cavity, high and thin ribs and difficult precision die forging forming; the 2014 alloy is easy to generate coarse grains, and the uniformity of the structure performance is difficult to control; the safety performance requirement of the wheel hub is high, and the comprehensive performance requirement is extremely high. Therefore, the biggest difficulties of the hub die forging are large difficulty in controlling the size and the uniformity of the structure performance.
Therefore, how to provide a method for removing slag from molten aluminum for casting ingots by 2014 aluminum alloy aviation precision hub die forgings is a technical problem to be solved by technical personnel in the field urgently.
Disclosure of Invention
In view of the above, the invention aims to provide a molten aluminum deslagging method for 2014 aluminum alloy aviation precision hub die forging ingot casting, so as to improve the product quality.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for removing slag from molten aluminum for casting ingots of 2014 aluminum alloy aviation precision hub die forgings comprises three-stage slag removal,
the first-stage deslagging is furnace refining, and the oxidizing slag can generate adsorption with a refining agent or inert gas in the refining process, so that the oxidizing slag is brought into the surface layer of the molten aluminum for removal;
the second-stage deslagging is online degassing, and oxidizing slag in the aluminum liquid floats upwards to the surface of the aluminum liquid along with hydrogen in the degassing process to perform deslagging;
and the third-season deslagging is realized by adopting a filtering plate for filtering on line, and the large granular slag is blocked by the filtering plate.
Preferably, the filter plate is a ceramic filter plate.
Preferably, the refining time in the furnace is 15 to 25 minutes.
Preferably, the furnace refining time is 20 minutes.
Preferably, the online degassing is degassing by using a plurality of degassing devices in series.
Preferably, there are two degassing devices.
Preferably, the filter plate is provided in plurality.
Preferably, the filter plates have different filtering precisions, and the arrangement direction is the precision increase along the moving direction of the aluminum liquid.
The method for removing the molten aluminum slag for the 2014 aluminum alloy aviation precision hub die forging cast ingot, provided by the invention, comprises three-stage slag removal,
the first-stage deslagging is furnace refining, and the oxidizing slag can generate adsorption with a refining agent or inert gas in the refining process, so that the oxidizing slag is brought into the surface layer of the molten aluminum for removal;
the second-stage deslagging is online degassing, and oxidizing slag in the aluminum liquid floats upwards to the surface of the aluminum liquid along with hydrogen in the degassing process to perform deslagging;
and the third-season deslagging is realized by adopting a filtering plate for filtering on line, and the large granular slag is blocked by the filtering plate.
Meanwhile, the molten aluminum is subjected to dehydrogenation and deslagging, so that the final hydrogen content in the melt is reduced to the minimum level, preparation is made for obtaining a compact ingot casting structure, the molten aluminum is separated from oxidation slag in the degassing treatment process, and the original slag content in the melt is reduced to a great extent through multi-stage pretreatment. Thereby improving the product quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic side view structure diagram of a 2014 aluminum alloy aviation precision hub die forging provided in an embodiment of the present invention;
fig. 2 is a second side view structural schematic diagram of the 2014 aluminum alloy aviation precision hub die forging provided by the embodiment of the invention.
In the above FIGS. 1-2:
the outer extension part 11, the cylinder 12, the oval pit 13 and the lug 14.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 to fig. 2, fig. 1 is a first side view structural schematic diagram of an 2014 aluminum alloy aviation precision hub die forging provided in an embodiment of the present invention; fig. 2 is a second side view structural schematic diagram of the 2014 aluminum alloy aviation precision hub die forging provided by the embodiment of the invention.
The molten aluminum deslagging method for the 2014 aluminum alloy aviation precision hub die forging cast ingot, which is provided by the embodiment of the invention, comprises three-stage deslagging,
the first-stage deslagging is furnace refining, and the oxidizing slag can generate adsorption with a refining agent or inert gas in the refining process, so that the oxidizing slag is brought into the surface layer of the molten aluminum for removal;
the second-stage deslagging is online degassing, and oxidizing slag in the aluminum liquid floats upwards to the surface of the aluminum liquid along with hydrogen in the degassing process to perform deslagging;
and the third-season deslagging is realized by adopting a filtering plate for filtering on line, and the large granular slag is blocked by the filtering plate.
Meanwhile, the molten aluminum is subjected to dehydrogenation and deslagging, so that the final hydrogen content in the melt is reduced to the minimum level, preparation is made for obtaining a compact ingot casting structure, the molten aluminum is separated from oxidation slag in the degassing treatment process, and the original slag content in the melt is reduced to a great extent through multi-stage pretreatment. Thereby improving the product quality.
Specifically, the filter plate is a ceramic filter plate. The filter plates are multiple, the filter precision of the filter plates is different, and the precision of the arrangement direction of the filter plates is increased along the moving direction of the aluminum liquid.
Specifically, the refining time in the furnace is 15-25 minutes. For example, the furnace refining time is 20 minutes.
Specifically, the online degassing is carried out by connecting a plurality of degassing devices in series. In particular to two degassing devices.
The embodiment of the invention provides a molten aluminum deslagging method for casting ingots by a 2014 aluminum alloy aviation precision hub die forging, which comprises the following steps:
the method adopts multistage pretreatment, the multistage pretreatment is divided into three stages, the first stage is refined in a furnace once, and the oxidizing slag can generate adsorption with a refining agent or inert gas in the refining process, so that the oxidizing slag is brought into the surface layer of the molten aluminum for removal; the second stage is on-line degassing, and oxidizing slag in the aluminum liquid floats to the surface of the aluminum liquid along with hydrogen in the degassing process to play a role in removing slag; the third level is on-line filtration, adopts the ceramic filter board to block the large granule sediment more than the filter.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method for removing slag from molten aluminum for casting ingots of 2014 aluminum alloy aviation precision hub die forgings is characterized by comprising three-stage slag removal,
the first-stage deslagging is furnace refining, and the oxidizing slag can generate adsorption with a refining agent or inert gas in the refining process, so that the oxidizing slag is brought into the surface layer of the molten aluminum for removal;
the second-stage deslagging is online degassing, and oxidizing slag in the aluminum liquid floats upwards to the surface of the aluminum liquid along with hydrogen in the degassing process to perform deslagging;
and the third-season deslagging is realized by adopting a filtering plate for filtering on line, and the large granular slag is blocked by the filtering plate.
2. The method for removing the molten aluminum slag for the 2014-aluminum alloy aviation precision hub die forging ingot casting according to claim 1, wherein the filter plate is a ceramic filter plate.
3. The method for removing the molten aluminum slag for the 2014 aluminum alloy aviation precision hub die forging cast ingot according to claim 1, characterized in that the refining time in the furnace is 15-25 minutes.
4. The method for removing the molten aluminum slag for the 2014 aluminum alloy aviation precision hub die forging cast ingot according to claim 3, characterized in that the refining time in the furnace is 20 minutes.
5. The molten aluminum deslagging method for the 2014 aluminum alloy aviation precision hub die forging cast ingot according to claim 3, characterized in that online degassing is carried out by connecting a plurality of degassing devices in series.
6. The method for deslagging the molten aluminum for casting ingots by the 2014 aluminum alloy aviation precision hub die forging according to claim 5, characterized by comprising two degassing devices.
7. The method for removing the molten aluminum slag for the 2014-aluminum alloy aviation precision hub die forging ingot casting according to claim 1, wherein the number of the filter plates is multiple.
8. The method for removing the molten aluminum slag for the 2014 aluminum alloy aviation precision hub die forging cast ingot according to claim 7, wherein the filtering precision of the filtering plates is different, and the precision of the filtering plates is increased along the moving direction of the molten aluminum in the arrangement direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911380440.3A CN111004939A (en) | 2019-12-27 | 2019-12-27 | Molten aluminum deslagging method for 2014 aluminum alloy aviation precision hub die forging ingot casting |
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| CN201911380440.3A CN111004939A (en) | 2019-12-27 | 2019-12-27 | Molten aluminum deslagging method for 2014 aluminum alloy aviation precision hub die forging ingot casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111363940A (en) * | 2020-04-30 | 2020-07-03 | 洛阳万基铝加工有限公司 | Method for reducing generation of aluminum slag in aluminum processing and smelting process |
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| CN101487088A (en) * | 2009-01-16 | 2009-07-22 | 内蒙古吉泰铝业有限公司 | Mixture gas, and method and apparatus for purifying aluminum alloy melt using the same |
| CN101713033A (en) * | 2009-11-23 | 2010-05-26 | 山东南山铝业股份有限公司 | Production technology for casting aluminum foil |
| CN104109784A (en) * | 2014-04-30 | 2014-10-22 | 广西南南铝加工有限公司 | Ultrahigh-strength Al-Zn-Mg-Cu system aluminum alloy large-size flat cast ingot and making method thereof |
| CN104212985A (en) * | 2014-09-08 | 2014-12-17 | 广西南南铝加工有限公司 | Preparation method of low-H content aerospace aluminum alloy melt |
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- 2019-12-27 CN CN201911380440.3A patent/CN111004939A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895937A (en) * | 1971-07-16 | 1975-07-22 | Ardal Og Sunndal Verk | Dynamic vacuum treatment to produce aluminum alloys |
| SU1039976A1 (en) * | 1982-01-20 | 1983-09-07 | Предприятие П/Я А-1977 | Method for refining molten metals |
| CN101487088A (en) * | 2009-01-16 | 2009-07-22 | 内蒙古吉泰铝业有限公司 | Mixture gas, and method and apparatus for purifying aluminum alloy melt using the same |
| CN101713033A (en) * | 2009-11-23 | 2010-05-26 | 山东南山铝业股份有限公司 | Production technology for casting aluminum foil |
| CN104109784A (en) * | 2014-04-30 | 2014-10-22 | 广西南南铝加工有限公司 | Ultrahigh-strength Al-Zn-Mg-Cu system aluminum alloy large-size flat cast ingot and making method thereof |
| CN104212985A (en) * | 2014-09-08 | 2014-12-17 | 广西南南铝加工有限公司 | Preparation method of low-H content aerospace aluminum alloy melt |
| CN104232968A (en) * | 2014-09-08 | 2014-12-24 | 广西南南铝加工有限公司 | Method for degassing and refining large-specification 2XXX aluminum alloy cast ingot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111363940A (en) * | 2020-04-30 | 2020-07-03 | 洛阳万基铝加工有限公司 | Method for reducing generation of aluminum slag in aluminum processing and smelting process |
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Application publication date: 20200414 |