CN201586738U - Riser tube for aluminum alloy low-pressure casting - Google Patents
Riser tube for aluminum alloy low-pressure casting Download PDFInfo
- Publication number
- CN201586738U CN201586738U CN2009202242480U CN200920224248U CN201586738U CN 201586738 U CN201586738 U CN 201586738U CN 2009202242480 U CN2009202242480 U CN 2009202242480U CN 200920224248 U CN200920224248 U CN 200920224248U CN 201586738 U CN201586738 U CN 201586738U
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- silicon carbide
- wall layer
- stalk
- aluminum alloy
- pressure casting
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Abstract
The utility model belongs to the technical field of special ceramic materials, and relates to a low-pressure casting riser tube used in the aluminum alloy casting industry. The riser tube adopts a composite structure, and comprises an inner wall layer (2) and an outer housing layer (1), wherein, the inner wall layer (2) is made of reaction sintering silicon carbide ceramics; the outer housing layer (1) is made of nitride combined with silicon carbide refractory or silicon carbide castable refractory; and the inner wall layer (2) and the outer housing layer (1) are concentric, and adopt an jointlessly formed structure. The utility model has the advantages of excellent airtightness, favorable high temperature-resistent strength, and long service life.
Description
Technical field
The utility model belongs to the special ceramic material technical field, relates to a kind of aluminum alloy low-pressure casting stalk that uses in the aluminium alloy casting industry.
Background technology
Stalk is one of critical component on the aluminum alloy low-pressure casting machine, and its performance directly influences the quality and the production efficiency of foundry goods.During use, stalk is installed on the air injection machine, and insert in the alloy melting device lower end, and 700 ℃ of melted aluminium alloy solutions in the left and right sides are from bottom to top extracted out from the bottom of smelting apparatus, is used for the casting of parts such as automotive hub, engine cylinder cover.The condition of work of stalk requires it to have the erosion performance of good anti-aluminium alloy solution, good thermal shock resistance, also will have good air-tightness and heat shock resistance fatigability simultaneously.
At present, aluminum alloy low-pressure casting mainly is divided into two kinds with stalk, and a kind of is by metal metal stalks such as cast iron, stainless steels, and another kind is the nonmetal stalk of being made by graphite, aluminium titanates, silicon nitride combined silicon carbide etc.Metal stalk long period of soaking is in aluminium alloy solution, and alloy solution corrodes serious to it, causes foundry goods to pollute, and influences product quality.In the nonmetal stalk, the non-oxidizability of graphite material is poor, wear no resistance, and the life-span is short.The stalk intensity of aluminium titanates material is not high, the too late silicon nitride combined silicon carbide material of thermal-shock resistance.Common silicon nitride combined silicon carbide matter stalk intensity height, good thermal shock, anti-aluminium water erosion, but air-tightness is relatively poor, and the valuable product that air-tightness is good is applied the comparison difficulty.
Summary of the invention
The purpose of this utility model is to propose a kind of aluminum alloy low-pressure casting stalk, and its overall performance is improved.
The technical scheme that the utility model proposed is: a kind of aluminum alloy low-pressure casting stalk, described stalk is a complex structure, has the outer shell of inner wall layer and the nitride combined silicon carbide refractory material or the silicon carbide refractory casting material formation of reaction sintering silicon carbide ceramic material; Inner wall layer, outer shell are with one heart and the structure that is formed in one.
Compare with conventional metals or nonmetal stalk, stalk of the present utility model has the following advantages:
The inner wall layer that contacts with aluminium alloy solution adopts the reaction sintering silicon carbide ceramic material, guarantees that integral material has excellent air tightness.The silicon carbide reaction-sintered material is a kind of by 80-95% (mass percent, as follows) the high strength dense ceramic material formed of SiC, 5-20% simple substance Si, its apparent porosity usually＜1%, rupture strength 〉=120MPa, thermal shock resistance is good, anti-aluminium alloy solution erosion performance is good, as the inner layer material that stalk and aluminium liquid directly contact, has solved the air-tightness of general ceramic material and the technical problem of corrosion resistance with this material fully.At present, China's silicon carbide reaction-sintered material preparation technology maturation, rich choice of products, the tubular products of different size is easily bought at home.
Outer shell adopts nitride combined silicon carbide refractory material or silicon carbide refractory casting material, the technology of preparing of these two kinds of materials is very ripe, they itself all have good anti-aluminium alloy solution erosion performance, good thermal shock resistance, higher mechanical strength, they are closely reinforced inner wall layer, make whole material have splendid serviceability.
The utility model stalk in inwall and shell, has been given full play to the performance of two kinds of materials with two kinds of different material reasonable disposition, and is easy to make, price economy, and result of use is good.
Description of drawings
Fig. 1 is the cutaway view of first embodiment of the present utility model.
Fig. 2 is the cutaway view of second embodiment of the present utility model.
Among the figure, 1, outer shell, 2, inner wall layer.
The specific embodiment
With specific embodiment the utility model is described in conjunction with the accompanying drawings:
A kind of aluminum alloy low-pressure casting stalk as shown in Figure 1, described stalk is a complex structure, has the outer shell 1 of inner wall layer 2 and the nitride combined silicon carbide refractory material or the silicon carbide refractory casting material formation of reaction sintering silicon carbide ceramic material; Inner wall layer 2 is the same with outer shell 1 length, outer shell 1 and the inner wall layer 2 concentric and structures that are formed in one.
A kind of aluminum alloy low-pressure casting stalk as shown in Figure 2, described stalk is a complex structure, has the outer shell 1 of inner wall layer 2 and the nitride combined silicon carbide refractory material or the silicon carbide refractory casting material formation of reaction sintering silicon carbide ceramic material; The length of inner wall layer 2 is less than outer shell 1, and the lower end of inner wall layer 2 is positioned on the step of outer shell 1 corresponding position.Inner wall layer 2, the outer shell 1 concentric and structure that is formed in one.
Claims (3)
1. aluminum alloy low-pressure casting stalk, it is characterized in that: described stalk is a complex structure, has the outer shell (1) of inner wall layer (2) and the nitride combined silicon carbide refractory material or the silicon carbide refractory casting material formation of reaction sintering silicon carbide ceramic material; The inner wall layer of described stalk (2), outer shell (1) are with one heart and the structure that is formed in one.
2. according to the described aluminum alloy low-pressure casting stalk of claim 1, it is characterized in that the length of described outer shell (1), inner wall layer (2) is identical.
3. according to the described aluminum alloy low-pressure casting stalk of claim 1, it is characterized in that described inner wall layer (2) length less than outer shell (1), the lower end of inner wall layer (2) is positioned on the step of outer shell (1) corresponding position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202242480U CN201586738U (en) | 2009-10-01 | 2009-10-01 | Riser tube for aluminum alloy low-pressure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202242480U CN201586738U (en) | 2009-10-01 | 2009-10-01 | Riser tube for aluminum alloy low-pressure casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201586738U true CN201586738U (en) | 2010-09-22 |
Family
ID=42746506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202242480U Expired - Fee Related CN201586738U (en) | 2009-10-01 | 2009-10-01 | Riser tube for aluminum alloy low-pressure casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201586738U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964979A (en) * | 2016-07-12 | 2016-09-28 | 安阳恒安电机有限公司 | Airproof high-temperature-resistant corrosion-resistant molten aluminum lifting pipe and compositions thereof |
| CN106739227A (en) * | 2016-12-14 | 2017-05-31 | 宜兴市华井科技有限公司 | A kind of stalk of duplex |
-
2009
- 2009-10-01 CN CN2009202242480U patent/CN201586738U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964979A (en) * | 2016-07-12 | 2016-09-28 | 安阳恒安电机有限公司 | Airproof high-temperature-resistant corrosion-resistant molten aluminum lifting pipe and compositions thereof |
| CN105964979B (en) * | 2016-07-12 | 2017-11-10 | 安阳恒安电机有限公司 | A kind of air tight high-temperature-resistant and anti-corrosion aluminum melt stalk |
| CN106739227A (en) * | 2016-12-14 | 2017-05-31 | 宜兴市华井科技有限公司 | A kind of stalk of duplex |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20151001 |
|
| EXPY | Termination of patent right or utility model |