CN1019027B - Foam aluminium alloy produced by specific prefabricated components - Google Patents
Foam aluminium alloy produced by specific prefabricated componentsInfo
- Publication number
- CN1019027B CN1019027B CN 89102473 CN89102473A CN1019027B CN 1019027 B CN1019027 B CN 1019027B CN 89102473 CN89102473 CN 89102473 CN 89102473 A CN89102473 A CN 89102473A CN 1019027 B CN1019027 B CN 1019027B
- Authority
- CN
- China
- Prior art keywords
- aluminium alloy
- prefabricated section
- flammable
- particle
- binding agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Powder Metallurgy (AREA)
Abstract
The present invention manufactures through hole foam aluminum alloy in a special precast block method, which belongs to the technical field of casting aluminum alloy. The technology manufactures a special precast block by mixing flammable plastic granules with the melting point below that of aluminum alloy and adhesives according to the structure requirements (the size, the shape, the distribution and the porosity of holes) of expected through hole foam aluminum alloy, the fondant of aluminum alloy seeps in the precast block and becomes a complex in 0.5 to 10 seconds under 9.8 to 49 Mp, the complex is heated at 200 DGE C to 500 DGE C, and through hole foam aluminum alloy is formed.
Description
The present invention is a kind of novel process of making foam aluminium alloy, belongs to the cast aluminium alloy technical field.
Cast foam porous metal and compare with mother metal little proportion (0.1～0.6 times) is arranged, big surface-area (50～80 times), and high porosity (40～90%) are divided into through hole and blind hole two big classes.Through-hole foamed metal is in thermal technology (heat exchange), acoustics (eliminate the noise, absorb sound), electronics (raising signal to noise ratio), energy technology (nuclear, hydrogen, battery, sun power), chemical industry, fields such as mechanics of machinery vibration damping all are widely used, comparing with the powder metallurgy porous metal has bigger pore diameter, high logical porosity, technology is simple, and is with low cost.The method of existing manufacturing foamed metal mainly contains three classes, the metal melt foaming, U.S.Patent 3843353(1974) addresses, but bubble is skewness in metal, complex process, the control material quality, all there is certain difficulty in the aspect to form high through-hole rate and boost productivity etc., lost wax process, Jpn.Ind.Tech.Bull.8(1980) 19.After this method was treated the refractory materials sclerosis with the hole in the fluidised form refractory materials filling sponge shape plastics, heating made the plastics gasification, obtains to have sponge-type porosity structure casting mold.Liquid metal poured into remove refractory materials after the casting mold cooled and solidified and obtain foamed metal, this method is being simplified technology, boosts productivity and waits aspects to be still waiting improvement; The particle method is that metal is poured in the casting mold that granular particle is housed, remove degranulation after solidifying and form hole, special public clear 62-30253, after special public clear 62-30254 adopts meltability sodium-chlor and inorganic particles to make porous insert respectively, be pressed into liquid metal and produce foamed metal, the common ground of particle method is that the particulate fusing point must be higher than melt, and this method weak point is control porosity, pore size, removes the particle and the aspects of boosting productivity and all has difficulties.
According to the existing deficiency of making the foamed metal method, the present invention proposes a kind of novel process of making foam aluminium alloy, to solve control foam aluminium alloy workmanship difficulty, the not high shortcoming of complex process, productivity.
The present invention is according to the structural requirement (hole size, shape, distribution, porosity) of expection foam aluminium alloy, aluminium alloy melt seepage flow under suitable processing condition is gone into prefabricated section with flammable plastic grain and burl agent mixing formation special prefabricated block becomes complex body, the reheat complex body forms foam aluminium alloy.Flammable particle is polystyrene particle and some plastic pellets; this class particle fusing point or combustion gasification temperature are lower than the aluminium alloy fusing point; shape can be spherical; polygon; big I is from 0.5mm～5mm or above (by the decision of foam aluminium alloy pore texture); and be coated with around the particle with the carbon buck to improve heat resisting temperature; in the redix binding agent, add a certain proportion of solidifying agent polyamide resin; mix with above-mentioned particle (10: 1～5: 1); 50 °～120 ℃ heating solidify to form prefabricated section in 5～30 minutes; in the aluminium alloy melt 0.5～10 second; pressure seepage flow under 9.8～49 MPas is gone into the binding agent around the flammable particle in the prefabricated component; be lower than particle at its fusing point of circumgranular binding agent and gasification temperature, thereby form aluminum alloy framework and combustiblematerials complex body that foam aluminium alloy is interconnected.In extremely short seepage flow process of setting, lack three prerequisites of flammable particle burning, temperature, oxygen, latter two condition in the time, so form in the porous Al alloy skeleton in the binding agent around aluminium alloy melt infiltrates flammable particle, flammable particle does not burn.And expection foam aluminium alloy through-hole structure is not changed, but in prefabricated section placing aluminium alloy member (pipe, type, plate) also, to form hardware foamed metal complex body.Being lower than 200 ℃～500 ℃ heating of aluminium alloy fusing point complex body, flammable particles fuse is flowed out or combustion gasification, obtain the foam aluminium alloy of expectation through-hole structure.
The present invention compares with existing manufacturing process, whole foam aluminium alloy is finished by special prefabricated block, seepage flow solidification Control and postheat treatment three process, technology is simple, the production rate height, mechanize production can be adopted, the foam aluminium alloy of various expection through-hole structures can be formed simultaneously by the control of coating of particles, size, distribution in the prefabricated section.
Be three embodiment of the present invention below: the Al of three kinds of aluminium alloys 99%; The Al-4.5Mg% alloy, the Al-12Si% alloy all follows these steps to implement.
1. with out-of-shape, the polystyrene particle of size 2.5mm～5.5mm and epoxy resin and polyamide resin were with 10: 1 thorough mixing, and (be of a size of and form prefabricated section among the φ 50 * 50mm), 70 ℃ were heated curing and demolding 10～20 minutes in the garden cylindrical mold.
2. with the prefabricated section that makes, put in the special-purpose pressing machine mould and (be of a size of φ 60 * 300mm and φ 70 * 300mm, aluminium closes 750 ℃ of melt temperatures far away, apply the pressure of 20 MPas during cast, in 8 seconds aluminium alloy melt seepage flow is gone in the prefabricated section, release through-hole foamed metal skeleton and prefabricated section complex body with push rod again.Be processed into the geomery that needs as need, in the complex body stage process.
3. complex body is heated to 350 ℃ in stove, the flammable particle formation foam aluminium alloy that promptly burns.The pore size of the through hole aluminum foam metal that obtains is 1.5～5.5mm, and the through hole porosity is 75～85%.
Claims (3)
1, a kind of processing method of making foam aluminium alloy, it is characterized in that making prefabricated section with the flammable plastic grain and the binding agent that are lower than the aluminium alloy fusing point, binding agent is to be made by epoxies resin and the solidifying agent mixed with 10: 1～5: 1, and the fusing point of binding agent and gasification temperature are lower than flammable particle; Flammable particle mixes mutually with binding agent, solidify to form prefabricated section in 5～30 minutes 50 ℃～120 ℃ heating; Aluminium alloy melt under 9.8～46 MPa pressure in 0.5～10 second seepage flow go into prefabricated section and solidify the formation complex body, at 200 ℃～500 ℃ heating complex bodys, flammable particles fuse or gasification are discharged, and form foam aluminium alloy.
2, processing method according to claim 1, the flammable plastic grain that it is characterized in that constituting prefabricated section is a polystyrene, coating of particles can be to be coated with the carbon buck around sphere, polygon, the particle.
3, processing method according to claim 1, it is characterized in that prefabricated section can be made into required aluminium alloy element shape or in prefabricated section placing aluminium alloy member (pipe, type, plate) to form aluminium alloy element foam aluminium alloy complex body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102473 CN1019027B (en) | 1989-11-11 | 1989-11-11 | Foam aluminium alloy produced by specific prefabricated components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102473 CN1019027B (en) | 1989-11-11 | 1989-11-11 | Foam aluminium alloy produced by specific prefabricated components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1051761A CN1051761A (en) | 1991-05-29 |
| CN1019027B true CN1019027B (en) | 1992-11-11 |
Family
ID=4854746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102473 Expired CN1019027B (en) | 1989-11-11 | 1989-11-11 | Foam aluminium alloy produced by specific prefabricated components |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019027B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1067728C (en) * | 1998-07-21 | 2001-06-27 | 曾绍谦 | Method for mfg. sponge metallic material with controlled pore shape and pore diameter structure |
| CN1101478C (en) * | 2000-11-23 | 2003-02-12 | 李道韫 | Process for preparing foam metal |
| CN106086779A (en) * | 2016-06-06 | 2016-11-09 | 王华胜 | A kind of micro-or nano size circulation aperture cellular solid and preparation method thereof |
| CN108193070A (en) * | 2018-02-05 | 2018-06-22 | 南通鑫祥锌业有限公司 | A kind of negative pressure casting method for preparing foam zinc-aluminium alloy |
-
1989
- 1989-11-11 CN CN 89102473 patent/CN1019027B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051761A (en) | 1991-05-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |