CN107297483B - Aluminum alloy thin-wall part casting method - Google Patents
Aluminum alloy thin-wall part casting method Download PDFInfo
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- CN107297483B CN107297483B CN201710284002.1A CN201710284002A CN107297483B CN 107297483 B CN107297483 B CN 107297483B CN 201710284002 A CN201710284002 A CN 201710284002A CN 107297483 B CN107297483 B CN 107297483B
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- aluminum alloy
- shell
- alloy thin
- pouring
- thin wall
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Classifications
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
- B22D21/04—Casting aluminium or magnesium
Abstract
The invention discloses a method for pouring an aluminum alloy thin-wall part, which comprises the following operation steps: (1) selecting a silica sol shell containing 1 surface shell, 2 back layers and 1 sealing layer, wherein the thickness of the shell is 3-5 mm; (2) carrying out ultrasonic treatment on the shell, blowing dry hot air, and preheating the shell; (3) pouring the aluminum alloy liquid at 30-50 deg.c in the aluminum alloy liquid line and pressure of 2.3-2.5MPa inside the pot. By adopting the casting method provided by the invention, the roughness of the surface of the manufactured aluminum alloy thin-wall part can be effectively reduced, the rejection rate can be reduced, and the quality and the production efficiency of the aluminum alloy thin-wall part are greatly improved.
Description
Technical field
The invention belongs to aluminium alloys to be poured field, and in particular to a kind of aluminum alloy thin wall pieces pouring procedure.
Background technique
Model casting typically refers to fusible material apperance is made, and on apperance surface, type is made in cladding several layers refractory material
Shell, then by apperance melt discharge shell, thus obtain the casting mold without die joint, after high-temperature roasting can back-up sand casting casting
Scheme.It is manufactured since wax material is widely used in apperance, therefore often model casting is known as " lost-wax casting ".Model casting can be used
The alloy species of method production have carbon steel, steel alloy, heat-resisting alloy, stainless steel, Precise Alloy, permanent-magnet alloy, bearing metal, copper
Alloy, aluminium alloy, titanium alloy and spheroidal graphite cast-iron etc..The shape of investment-casting is generally all more complicated, castable on casting to portal
Minimum diameter is 0.3mm up to 0.5mm, the minimum wall thickness (MINI W.) of casting.Although in recent years, although China's precision-investment casting has
Biggish progress, but there is also problems, the especially manufacturing field in aluminum alloy thin wall pieces, it is thick often to there is cast(ing) surface
Rugosity is high, and rejection rate is higher, and the low problem of production efficiency seriously constrains the development of aluminum alloy thin wall pieces casting industry.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of aluminum alloy thin wall pieces pouring procedure.
The present invention is achieved by the following technical solutions.
A kind of aluminum alloy thin wall pieces pouring procedure, including following operating procedure:
(1) choose the silicasol case containing 1 layer face piece, 2 layers of backing layer and 1 layer of confining bed, shell with a thickness of 3-5mm,
Wherein face-piece is made of binder, calamine, and backing layer is made of binder, silica brick, and confining bed is by binder, magnesia, oxidation
Lanthanum, SiC whisker are made, and wherein the average grain diameter of calamine is 10-14 mesh, and the average grain diameter of the silica brick is 20-25 mesh, described
Magnesia, lanthana, SiC whisker average grain diameter be 40-45 mesh；
(2) shell is ultrasonically treated, then uses heated dry air air-blowing, then shell is preheated；
(3) aluminum alloy melt is poured, pouring temperature is to add 30-50 DEG C in aluminum alloy melt phase line, the speed of casting
Meet karr gold formula, using the method for pressure casting, the pressure in pouring can is 2.3-2.5MPa.
Specifically, binder described in above-mentioned steps (1) is silica solution.
Specifically, the frequency of ultrasonic wave is 38kHz when ultrasonic treatment in above-mentioned steps (2), and the time of ultrasonic treatment is
30min。
Specifically, the temperature of heated dry air is 130-150 DEG C in above-mentioned steps (2), and the time of air-blowing is 10min.
Specifically, the temperature of the shell preheating in above-mentioned steps (2) is 310-330 DEG C.
From the above technical scheme, it can be seen that the beneficial effects of the present invention are:
Using pouring procedure provided by the invention, the coarse of aluminum alloy thin wall pieces surface obtained can be effectively reduced
Degree, and rejection rate can be reduced, greatly improve the quality and production efficiency of aluminum alloy thin wall pieces.Wherein, the present invention provides
Silicasol case, be made of 1 layer face piece, 2 layers of backing layer and 1 layer of confining bed, not only intensity is preferable, during use will not
There is phenomena such as knockout, scab, swollen shell, burr, and due to the partial size of every layer material difference, causes it with good ventilative
Property, can make during casting, and the gas and the intracavitary gas of type for vaporizing generation can be quickly absorbed, absorption
Gas is not easy to overflow, and effectively avoids influence of the gas to the quality of aluminum alloy thin wall pieces；Shell is ultrasonically treated, then
Using heated dry air air-blowing, speed when shell pre-heating temperature elevation can be effectively promoted, can increase the uniformity of shell Temperature Distribution,
The effect of preheating is improved, the mold-filling capacity of aluminium alloy is improved, aluminium alloy Local cooling excessive velocities is effectively avoided and makes
At cold shut, stomata, shrinkage cavity the defects of, improve yield rate.
Specific embodiment
In order to enable those skilled in the art to be further understood that feature and technology contents of the invention, please referring to following has
Close detailed description of the invention.
Embodiment 1
A kind of aluminum alloy thin wall pieces pouring procedure, including following operating procedure:
(1) choose the silicasol case containing 1 layer face piece, 2 layers of backing layer and 1 layer of confining bed, shell with a thickness of 3mm,
Middle face-piece is made of binder, calamine, and backing layer is made of binder, silica brick, confining bed by binder, magnesia, lanthana,
SiC whisker is made, and wherein the average grain diameter of calamine is 10 mesh, and the average grain diameter of the silica brick is 20 mesh, the magnesia, oxygen
Change lanthanum, the average grain diameter of SiC whisker is 40 mesh；
(2) shell is ultrasonically treated, then uses heated dry air air-blowing, then shell is preheated；
(3) aluminum alloy melt is poured, pouring temperature is to add 30 DEG C in aluminum alloy melt phase line, and the speed of casting meets
Karr gold formula, using the method for pressure casting, the pressure in pouring can is 2.3MPa.
Specifically, binder described in above-mentioned steps (1) is silica solution.
Specifically, the frequency of ultrasonic wave is 38kHz when ultrasonic treatment in above-mentioned steps (2), and the time of ultrasonic treatment is
30min。
Specifically, the temperature of heated dry air is 130 DEG C in above-mentioned steps (2), and the time of air-blowing is 10min.
Specifically, the temperature of the shell preheating in above-mentioned steps (2) is 310 DEG C.
Embodiment 2
A kind of aluminum alloy thin wall pieces pouring procedure, including following operating procedure:
(1) choose the silicasol case containing 1 layer face piece, 2 layers of backing layer and 1 layer of confining bed, shell with a thickness of 4mm,
Middle face-piece is made of binder, calamine, and backing layer is made of binder, silica brick, confining bed by binder, magnesia, lanthana,
SiC whisker is made, and wherein the average grain diameter of calamine is 10 mesh, and the average grain diameter of the silica brick is 25 mesh, the magnesia, oxygen
Change lanthanum, the average grain diameter of SiC whisker is 40 mesh；
(2) shell is ultrasonically treated, then uses heated dry air air-blowing, then shell is preheated；
(3) aluminum alloy melt is poured, pouring temperature is to add 40 DEG C in aluminum alloy melt phase line, and the speed of casting meets
Karr gold formula, using the method for pressure casting, the pressure in pouring can is 2.4MPa.
Specifically, binder described in above-mentioned steps (1) is silica solution.
Specifically, the frequency of ultrasonic wave is 38kHz when ultrasonic treatment in above-mentioned steps (2), and the time of ultrasonic treatment is
30min。
Specifically, the temperature of heated dry air is 140 DEG C in above-mentioned steps (2), and the time of air-blowing is 10min.
Specifically, the temperature of the shell preheating in above-mentioned steps (2) is 320 DEG C.
Embodiment 3
A kind of aluminum alloy thin wall pieces pouring procedure, including following operating procedure:
(1) choose the silicasol case containing 1 layer face piece, 2 layers of backing layer and 1 layer of confining bed, shell with a thickness of 5mm,
Middle face-piece is made of binder, calamine, and backing layer is made of binder, silica brick, confining bed by binder, magnesia, lanthana,
SiC whisker is made, and wherein the average grain diameter of calamine is 14 mesh, and the average grain diameter of the silica brick is 25 mesh, the magnesia, oxygen
Change lanthanum, the average grain diameter of SiC whisker is 45 mesh；
(2) shell is ultrasonically treated, then uses heated dry air air-blowing, then shell is preheated；
(3) aluminum alloy melt is poured, pouring temperature is to add 50 DEG C in aluminum alloy melt phase line, and the speed of casting meets
Karr gold formula, using the method for pressure casting, the pressure in pouring can is 2.5MPa.
Specifically, binder described in above-mentioned steps (1) is silica solution.
Specifically, the frequency of ultrasonic wave is 38kHz when ultrasonic treatment in above-mentioned steps (2), and the time of ultrasonic treatment is
30min。
Specifically, the temperature of heated dry air is 150 DEG C in above-mentioned steps (2), and the time of air-blowing is 10min.
Specifically, the temperature of the shell preheating in above-mentioned steps (2) is 330 DEG C.
Comparative example 1
Calamine in step (1), silica brick, magnesia, lanthana, SiC whisker average grain diameter be 40 mesh, remaining step
It is identical with embodiment 1.
Comparative example 2
Shell without ultrasonic treatment and heated dry air air-blowing, be directly preheated to the temperature of setting, remaining step with
Embodiment 2 is identical.
Be made the aluminium alloy thin-walled casting of same model with the method for embodiment and comparative example respectively, aluminium alloy used at
Point identical, in addition to the pouring condition is different outer, remaining making step is identical, measures the casting of casting out
The roughness and yield rate on surface, wherein roughness using TR240 type portable surface roughmeter measure, medium casting without
The surface treatment such as polishing is crossed, test result is as shown in table 1:
Influence of the different pouring procedures of table 1 to aluminum alloy thin wall pieces quality
| Project | Yield rate/% | Casting average surface roughness/μm |
| Embodiment 1 | 98.9 | 1.88 |
| Comparative example 1 | 94.7 | 30.71 |
| Embodiment 2 | 99.1 | 1.79 |
| Comparative example 2 | 90.3 | 14.42 |
| Embodiment 3 | 99.2 | 1.75 |
As shown in Table 1, aluminum alloy thin wall pieces pouring procedure provided by the invention, it is coarse can to effectively reduce cast(ing) surface
Degree, greatly improves the quality of casting, improves yield rate.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (5)
1. a kind of aluminum alloy thin wall pieces pouring procedure, which is characterized in that including following operating procedure:
(1) choose the silicasol case containing 1 layer face piece, 2 layers of backing layer and 1 layer of confining bed, shell with a thickness of 3-5mm, wherein
Face-piece is made of binder, calamine, and backing layer is made of binder, silica brick, confining bed by binder, magnesia, lanthana,
SiC whisker is made, and wherein the average grain diameter of calamine is 10-14 mesh, and the average grain diameter of the silica brick is 20-25 mesh, the oxygen
Change magnesium, lanthana, SiC whisker average grain diameter be 40-45 mesh；
(2) shell is ultrasonically treated, then uses heated dry air air-blowing, then shell is preheated；
(3) aluminum alloy melt is poured, pouring temperature is to add 30-50 DEG C in aluminum alloy melt phase line, and the speed of casting meets
Karr gold formula, using the method for pressure casting, the pressure in pouring can is 2.3-2.5MPa.
2. a kind of aluminum alloy thin wall pieces pouring procedure according to claim 1, which is characterized in that described in step (1)
Binder is silica solution.
3. a kind of aluminum alloy thin wall pieces pouring procedure according to claim 1, which is characterized in that ultrasonic in step (2)
The frequency of ultrasonic wave is 38kHz when processing, and the time of ultrasonic treatment is 30min.
4. a kind of aluminum alloy thin wall pieces pouring procedure according to claim 1, which is characterized in that xeothermic in step (2)
The temperature of air is 130-150 DEG C, and the time of air-blowing is 10min.
5. a kind of aluminum alloy thin wall pieces pouring procedure according to claim 3 or 4, which is characterized in that in step (2)
The temperature of shell preheating is 310-330 DEG C.
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| CN201710284002.1A CN107297483B (en) | 2017-04-26 | 2017-04-26 | Aluminum alloy thin-wall part casting method |
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| CN201710284002.1A CN107297483B (en) | 2017-04-26 | 2017-04-26 | Aluminum alloy thin-wall part casting method |
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| CN107297483B true CN107297483B (en) | 2019-05-14 |
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| CN107790633B (en) * | 2017-11-14 | 2020-12-11 | 五河县俊宝钢结构有限公司 | Investment precision casting process for aluminum alloy doors and windows |
| CN114918373B (en) * | 2022-04-26 | 2023-06-13 | 鹰普航空科技有限公司 | Process for eliminating white spots on anodized surface of aluminum alloy investment casting after processing |
Citations (7)
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|---|---|---|---|---|
| JP2000202574A (en) * | 1999-01-12 | 2000-07-25 | Mitsubishi Materials Corp | Mold for high strength precision casting and manufacture thereof |
| DE602005011735D1 (en) * | 2004-10-26 | 2009-01-29 | United Technologies Corp | Non-oxidizable coating |
| CN102294436A (en) * | 2011-09-19 | 2011-12-28 | 哈尔滨实钛新材料科技发展有限公司 | Method for precisely casting titanium alloy and titanium aluminum alloy with low cost |
| CN103071764A (en) * | 2012-11-30 | 2013-05-01 | 上海大学 | CaZrO3 mold shell used for titanium and titanium alloy precision casting and preparation method |
| CN104368757A (en) * | 2014-11-07 | 2015-02-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Thin-walled circular type investment casting shell and preparation method thereof |
| CN105414485A (en) * | 2015-11-30 | 2016-03-23 | 湖州南丰机械制造有限公司 | Method for preparing casting shell of fired mold |
| CN106493296A (en) * | 2016-10-24 | 2017-03-15 | 广西大学 | A kind of shell manufacture method of hot investment casting |
-
2017
- 2017-04-26 CN CN201710284002.1A patent/CN107297483B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000202574A (en) * | 1999-01-12 | 2000-07-25 | Mitsubishi Materials Corp | Mold for high strength precision casting and manufacture thereof |
| DE602005011735D1 (en) * | 2004-10-26 | 2009-01-29 | United Technologies Corp | Non-oxidizable coating |
| CN102294436A (en) * | 2011-09-19 | 2011-12-28 | 哈尔滨实钛新材料科技发展有限公司 | Method for precisely casting titanium alloy and titanium aluminum alloy with low cost |
| CN103071764A (en) * | 2012-11-30 | 2013-05-01 | 上海大学 | CaZrO3 mold shell used for titanium and titanium alloy precision casting and preparation method |
| CN104368757A (en) * | 2014-11-07 | 2015-02-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Thin-walled circular type investment casting shell and preparation method thereof |
| CN105414485A (en) * | 2015-11-30 | 2016-03-23 | 湖州南丰机械制造有限公司 | Method for preparing casting shell of fired mold |
| CN106493296A (en) * | 2016-10-24 | 2017-03-15 | 广西大学 | A kind of shell manufacture method of hot investment casting |
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Address after: 237200 Mount Holyoke County Economic Development Zone, Lu'an, Anhui Patentee after: Anhui Mount Holyoke Longxin Metal Technology Co., Ltd. Address before: 237200 Mount Holyoke County Economic Development Zone, Lu'an, Anhui Patentee before: HUOSHAN LONGXIN METAL PRODUCTS CO., LTD. |
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Effective date of registration: 20220511 Address after: 237200 jingsan North Road, Huoshan County Economic Development Zone, Lu'an City, Anhui Province Patentee after: Anhui Xinyue Casting Technology Co.,Ltd. Address before: 237200 Mount Holyoke County Economic Development Zone, Lu'an, Anhui Patentee before: ANHUI HUOSHAN LONGXIN METAL TECHNOLOGY Co.,Ltd. |
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