CN107243602A - Model casting aluminium alloy smelting pouring procedure - Google Patents
Model casting aluminium alloy smelting pouring procedure Download PDFInfo
- Publication number
- CN107243602A CN107243602A CN201710439236.9A CN201710439236A CN107243602A CN 107243602 A CN107243602 A CN 107243602A CN 201710439236 A CN201710439236 A CN 201710439236A CN 107243602 A CN107243602 A CN 107243602A
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- aluminium
- aluminium alloy
- alloy
- model casting
- pouring procedure
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- 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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of model casting aluminium alloy smelting pouring procedure, this method comprises the following steps：1) alloy melting：Melting fine aluminium, aluminium silicon intermediate alloy, fine copper and pure manganese under conditions of temperature is 680 700 DEG C, add the pure magnesium of addition after coverture, melting completely and are warming up to 700 720 DEG C, then add refining degasifier by several times, refine 3 10 minutes, obtain aluminum alloy melt；2) Baking：By ceramic shell to be cast temperature be 1,050 1100 DEG C under conditions of be calcined 30~40 minutes, be cooled to 800 1000 DEG C it is standby；3) moulding by casting：By step 1) obtained by aluminum alloy melt be cooled to 620 670 DEG C after pour into step 2) processing after ceramic shell in, obtain precast piece；4) cooling and demolding：By step 3) obtained by precast piece be cooled to after room temperature and remove ceramic shell, get product aluminium alloy castings.The present invention effectively reduces the smelting temperature of aluminium alloy, reduces slag inclusion and gas hole defect, improve the qualification rate of aluminium alloy investment-casting using after relatively low smelting temperature.
Description
Technical field
The present invention relates to the technical field of aluminium alloy cast, in particular to a kind of model casting aluminium alloy smelting cast side
Method.
Background technology
, will can be smoothly full of casting mold after ensureing aluminium alloy cast in existing model casting aluminum melting process
After aluminium alloy is melted under 550-600 DEG C of temperature conditionss, continue heating-up temperature to 730-760 DEG C, the essence such as progress degasification, rotten
Refining is handled.Then the aluminum alloy melt of overheat is cooled into 700-730 DEG C of cast.Ceramic-mould warp used in aluminium alloy model casting
After 1050~1200 DEG C of high-temperature roastings, 300~350 DEG C of cast aluminium alloys are cooled to.However, because smelting temperature is very high, alloy
Liquid largely can aoxidize to form oxidizing slag in the process, and a large amount of air-breathings, because oxidation and air-breathing formation are mingled with and pin in product
The defect in hole.
The content of the invention
Present invention aim to solve the deficiency of above-mentioned background technology, and provide a kind of effective oxidation for reducing alloy
With air-breathing, the model casting aluminium alloy smelting pouring procedure for the yield rate for improving casting.
To achieve the above object, a kind of model casting aluminium alloy smelting pouring procedure provided by the present invention, including as follows
Step：
1) alloy melting
Melting fine aluminium, aluminium-silicon intermediate alloy, fine copper and pure manganese, add covering under conditions of temperature is 680-700 DEG C
Pure magnesium is added after agent, melting completely and is warming up to 700-720 DEG C, then adds refining degasifier by several times, refines 3-10 minutes, obtains aluminium
Aluminium alloy；
2) Baking
Ceramic shell to be cast is calcined 30~40 minutes under conditions of temperature is 1050-1100 DEG C, is cooled to
800-1000 DEG C standby；
3) moulding by casting
By step 1) obtained by aluminum alloy melt be cooled to after 620-670 DEG C pour into step 2) processing after ceramic shell in,
Obtain precast piece；
4) cooling and demolding
By step 3) obtained by precast piece be cooled to after room temperature and remove ceramic shell, get product aluminium alloy castings.
Further, the fine aluminium, aluminium-silicon intermediate alloy, fine copper, the mass ratio of pure manganese are 100:0.4-5:0.1-0.5:
0.05-1。
Further, the mass ratio of the pure magnesium and fine aluminium is 0.2-5:100.
Further, the mass ratio of the coverture and fine aluminium is 1-2:100.
Further, the coverture is the mixture of potassium chloride and sodium chloride, and the mass ratio of potassium chloride and sodium chloride is
1:1。
Further, the mass ratio of the refining degasifier and fine aluminium is 0.5-0.7:100.
Further, the refining degasifier is the mixture of carbon trichloride and prodan, carbon trichloride and fluosilicic acid
The mass ratio of sodium is 1:1.
Further, in the step 1) in, refining degasifier is divided into 3~5 additions, and the time interval added every time is
1~2 minute.
Compared with prior art, the invention has the advantages that：
First, the present invention effectively reduces the smelting temperature of aluminium alloy using after relatively low smelting temperature, reduce in melting
During, oxidation and the air-breathing of alloy are effectively reduced, reduces because casting caused by slag inclusion and stomata is scrapped, improves
The qualification rate of aluminium alloy investment-casting.
Second, the present invention is cast using higher shell temperature, can be in situation about being cast with lower temperature aluminum alloy melt
Under, ensure the instantaneous heating of aluminium alloy the smooth shaping of thin-section casting by casting mold, obtain the higher casting of surface quality, carry
The quality of high casting finished products.
Third, the present invention can significantly reduce the defect being mingled with stomata of casting, the mechanical property of casting is improved, through reality
The test of border sample, the tensile strength of casting has 5-8% lifting.
Brief description of the drawings
Fig. 1 is the schematic diagram of finished product aluminium alloy castings prepared by embodiment 1；
Embodiment
With reference to specific embodiment, the present invention is described in further detail.
Embodiment 1：
Model casting aluminium alloy smelting pouring procedure of the present invention, comprises the following steps：
1) alloy melting
Under conditions of in-furnace temperature is 700 DEG C, fine aluminium, aluminium-silicon intermediate alloy, fine copper, pure manganese are added into stove, wherein
Fine aluminium, aluminium-silicon intermediate alloy, fine copper, the mass ratio of pure manganese are 100:5:0.5:1, the raw material heating period, which tries one's best, improves heating work(
Rate, accelerates alloy melting speed, and raw material starts after dissolving, addition coverture (coverture is the mixture of potassium chloride and sodium chloride,
The mass ratio of potassium chloride and sodium chloride is 1:1), coverture addition is the 2% of fine aluminium quality, makes alloy liquid level all the time in guarantor
Shield state；Raw material adds pure magnesium thereto with bell jar after all melting, pure magnesium addition is the 5% of fine aluminium quality, bell jar mouthful court
Lower rapid press-in furnace bottom, now operation should prevent that aluminium liquid from splashing very with caution, then be warming up to 720 DEG C, add refining degasifier
(refining degasifier is the mixture of carbon trichloride and prodan, and the mass ratio of carbon trichloride and prodan is 1:1) refine
10 minutes, refining degasifier addition was the 0.5% of fine aluminium quality, during refining, and degasifier point will be refined with bell jar
Under three press-in melt liquid levels, close to crucible bottom, slowly uniformly rotate clockwise, speed will be delayed, act and want steady, it is to avoid
Molten metal is significantly stirred, and examines gas floating；
2) Baking
Ceramic shell to be cast is calcined 40 minutes under conditions of temperature is 1100 DEG C, it is ensured that shell sintering is good,
Be cooled to 1000 DEG C it is standby；
3) moulding by casting
By step 1) obtained by aluminum alloy melt be cooled to 670 DEG C after pour into step 2) processing after ceramic shell in, obtain
Precast piece；
4) cooling and demolding
By step 3) obtained by precast piece be cooled to after room temperature and remove ceramic shell, get product aluminium alloy castings.
Embodiment 2：
Model casting aluminium alloy smelting pouring procedure of the present invention, comprises the following steps：
1) alloy melting
Under conditions of in-furnace temperature is 680 DEG C, fine aluminium, aluminium-silicon intermediate alloy, fine copper, pure manganese are added into stove, wherein
Fine aluminium, aluminium-silicon intermediate alloy, fine copper, the mass ratio of pure manganese are 100:0.4:0.1:0.05, the raw material heating period, which tries one's best to improve, to be added
Thermal power, accelerates alloy melting speed, raw material starts after dissolving, and adding coverture, (coverture is the mixed of potassium chloride and sodium chloride
The mass ratio of compound, potassium chloride and sodium chloride is 1:1), coverture addition is the 1% of fine aluminium quality, makes alloy liquid level all the time
In guard mode；Raw material adds pure magnesium thereto with bell jar after all melting, pure magnesium addition is the 0.2% of fine aluminium quality,
Bell jar mouth down is pressed into rapidly furnace bottom, and now operation should prevent aluminium liquid from splashing very with caution, then be warming up to 700 DEG C, add essence
Refining degasifier, (refining degasifier is the mixture of carbon trichloride and prodan, and the mass ratio of carbon trichloride and prodan is
1:1) refine 3 minutes, refining degasifier addition is the 0.7% of fine aluminium quality, during refining, is removed refining with bell jar
Gas agent is pressed under melt liquid level in three times, close to crucible bottom, is slowly uniformly rotated clockwise, and speed will be delayed, act and put down
Surely, it is to avoid molten metal is significantly stirred, gas floating is examined；
2) Baking
Ceramic shell to be cast is calcined 30 minutes under conditions of temperature is 1050 DEG C, it is ensured that shell sintering is good,
Be cooled to 800 DEG C it is standby；
3) moulding by casting
By step 1) obtained by aluminum alloy melt be cooled to 620 DEG C after pour into step 2) processing after ceramic shell in, obtain
Precast piece；
4) cooling and demolding
By step 3) obtained by precast piece be cooled to after room temperature and remove ceramic shell, get product aluminium alloy castings.
Embodiment 3：
Model casting aluminium alloy smelting pouring procedure of the present invention, comprises the following steps：
1) alloy melting
Under conditions of in-furnace temperature is 690 DEG C, fine aluminium, aluminium-silicon intermediate alloy, fine copper, pure manganese are added into stove, wherein
Fine aluminium, aluminium-silicon intermediate alloy, fine copper, the mass ratio of pure manganese are 100:2:0.4:0.08, the raw material heating period, which tries one's best, improves heating
Power, accelerates alloy melting speed, and raw material starts after dissolving, and adding coverture, (coverture is the mixing of potassium chloride and sodium chloride
The mass ratio of thing, potassium chloride and sodium chloride is 1:1), coverture addition is the 1.5% of fine aluminium quality, makes alloy liquid level all the time
In guard mode；Raw material adds pure magnesium thereto with bell jar after all melting, pure magnesium addition is the 2.5% of fine aluminium quality,
Bell jar mouth down is pressed into rapidly furnace bottom, and now operation should prevent aluminium liquid from splashing very with caution, then be warming up to 710 DEG C, add essence
Refining degasifier, (refining degasifier is the mixture of carbon trichloride and prodan, and the mass ratio of carbon trichloride and prodan is
1:1) refine 3-10 minute, refining degasifier addition is the 0.6% of fine aluminium quality, during refining, with bell jar by essence
Refining degasifier is pressed under melt liquid level in five times, close to crucible bottom, is slowly uniformly rotated clockwise, speed will be delayed, act
It is steady, it is to avoid molten metal is significantly stirred, examine gas floating；
2) Baking
Ceramic shell to be cast is calcined 30~40 minutes under conditions of temperature is 1080 DEG C, it is ensured that shell sintering is good
It is good, be cooled to 900 DEG C it is standby；
3) moulding by casting
By step 1) obtained by aluminum alloy melt be cooled to 650 DEG C after pour into step 2) processing after ceramic shell in, obtain
Precast piece；
4) cooling and demolding
By step 3) obtained by precast piece be cooled to after room temperature and remove ceramic shell, get product aluminium alloy castings.
Effect example：
Aluminium alloy castings prepared by embodiment 1-3 enters under the same conditions as a comparison case with conventional aluminium alloy castings
Row correlated performance is tested, as a result such as table 1：
Table 1
From table 1 it follows that tensile strength is significantly larger than conventional aluminium alloy to the aluminium alloy castings of the invention prepared again
Casting, and appearance uniform is consistent, pore-free.
It can be seen from figure 1 that using the pouring technology after improving, the slag inclusion and gas hole defect of product have obvious improvement, greatly
The big quality and qualification rate for improving product.
The foregoing is only a specific embodiment of the invention, it is noted that any those skilled in the art exist
Disclosed herein technical scope in, the change or replacement that can be readily occurred in, should all cover protection scope of the present invention it
It is interior.
Claims (8)
1. a kind of model casting aluminium alloy smelting pouring procedure, it is characterised in that comprise the following steps：
1) alloy melting
Melting fine aluminium, aluminium-silicon intermediate alloy, fine copper and pure manganese, add coverture under conditions of temperature is 680-700 DEG C,
Pure magnesium is added after melting completely and is warming up to 700-720 DEG C, then adds refining degasifier by several times, refines 3-10 minutes, obtains aluminium conjunction
Golden liquid；
2) Baking
Ceramic shell to be cast is calcined 30~40 minutes under conditions of temperature is 1050-1100 DEG C, 800- is cooled to
1000 DEG C standby；
3) moulding by casting
By step 1) obtained by aluminum alloy melt be cooled to after 620-670 DEG C pour into step 2) processing after ceramic shell in, obtain
Precast piece；
4) cooling and demolding
By step 3) obtained by precast piece be cooled to after room temperature and remove ceramic shell, get product aluminium alloy castings.
2. model casting aluminium alloy smelting pouring procedure according to claim 1, it is characterised in that the fine aluminium, aluminium-silicon
Intermediate alloy, fine copper, the mass ratio of pure manganese are 100:0.4-5:0.1-0.5:0.05-1.
3. model casting aluminium alloy smelting pouring procedure according to claim 1, it is characterised in that the pure magnesium and fine aluminium
Mass ratio be 0.2-5:100.
4. model casting aluminium alloy smelting pouring procedure according to claim 1, it is characterised in that the coverture with it is pure
The mass ratio of aluminium is 1-2:100.
5. the model casting aluminium alloy smelting pouring procedure according to claim 1 or 4, it is characterised in that the coverture
For potassium chloride and the mixture of sodium chloride, the mass ratio of potassium chloride and sodium chloride is 1:1.
6. model casting aluminium alloy smelting pouring procedure according to claim 1, it is characterised in that the refining degasifier
Mass ratio with fine aluminium is 0.5-0.7:100.
7. the model casting aluminium alloy smelting pouring procedure according to claim 1 or 6, it is characterised in that the refining is removed
Gas agent is the mixture of carbon trichloride and prodan, and the mass ratio of carbon trichloride and prodan is 1:1.
8. model casting aluminium alloy smelting pouring procedure according to claim 1, it is characterised in that in the step 1)
In, refining degasifier is divided into 3~5 additions, and the time interval added every time is 1~2 minute.
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| CN201710439236.9A CN107243602B (en) | 2017-06-06 | 2017-06-06 | Model casting aluminium alloy smelting pouring procedure |
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| CN201710439236.9A CN107243602B (en) | 2017-06-06 | 2017-06-06 | Model casting aluminium alloy smelting pouring procedure |
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Cited By (2)
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| CN108326253A (en) * | 2018-02-02 | 2018-07-27 | 韶关市泰铭压铸有限公司 | A kind of production method of aluminium alloy compression casting motor aluminum hull |
| CN109465568A (en) * | 2018-12-29 | 2019-03-15 | 郑州机械研究所有限公司 | A kind of diamond grinding tool soldering copper based active solder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108326253A (en) * | 2018-02-02 | 2018-07-27 | 韶关市泰铭压铸有限公司 | A kind of production method of aluminium alloy compression casting motor aluminum hull |
| CN109465568A (en) * | 2018-12-29 | 2019-03-15 | 郑州机械研究所有限公司 | A kind of diamond grinding tool soldering copper based active solder |
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| CN107243602B (en) | 2019-10-25 |
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