CN107201488A - Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in a kind of cocrystallized Al-Si alloy - Google Patents
Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in a kind of cocrystallized Al-Si alloy Download PDFInfo
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- CN107201488A CN107201488A CN201710299942.8A CN201710299942A CN107201488A CN 107201488 A CN107201488 A CN 107201488A CN 201710299942 A CN201710299942 A CN 201710299942A CN 107201488 A CN107201488 A CN 107201488A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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- 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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
- C22C21/04—Modified aluminium-silicon alloys
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Abstract
The present invention relates to belong to Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in non-ferrous metal Field of Heat-treatment, more particularly to a kind of cocrystallized Al-Si alloy.The present invention 5~60 DEG C of progress spheroidisings in short-term more than its eutectic temperature (577 DEG C) by cocrystallized Al-Si alloy, make spherolitic Eutectic Silicon in Al-Si Cast Alloys be evenly distributed in aluminum substrate, so as to improve the nodularization efficiency of Eutectic Silicon in Al-Si Cast Alloys.The present invention has but reached such effect by simple heat treatment, be it is a kind of it is simple, more quickly make the heat treatment method of Eutectic Silicon in Al-Si Cast Alloys nodularization.
Description
Technical field
The present invention relates to belonging to, Eutectic Silicon in Al-Si Cast Alloys in non-ferrous metal Field of Heat-treatment, more particularly to a kind of cocrystallized Al-Si alloy is quick
Nodulizing process.
Background technology
Cocrystallized Al-Si alloy has preferable fluidity of molten and casting mold filling capacity, especially specific strength height, thermal expansion system
Small, wear resistance and corrosion resistances are good etc. that characteristic is widely used in automobile or piston preparation industry for number.In unmetamorphosed cocrystallized Al-Si alloy,
Eutectic Silicon in Al-Si Cast Alloys is distributed in α-Al matrixes in thick needle-like, seriously isolates matrix, reduces the mechanical property and machinability of alloy
Energy.Scientific worker and it is industrial improve the form and size of Eutectic Silicon in Al-Si Cast Alloys frequently with Metamorphism treatment, to meet to eutectic aluminum-silicon
The requirement of alloy property.
At present, Metamorphism treatment is generally carried out to Eutectic Silicon in Al-Si Cast Alloys using single elements such as sodium, strontium, antimony, rare earths.Sodium goes bad ability by force,
But modification effect easily fails, and liquid alusil alloy mobility can be reduced.Strontium is similar with sodium metamorphic mechanism, is all altogether by absorption
Hinder it to grow slabbing on the growth step of crystal silicon to reach the effect of refined eutectic structure, but the rotten rear casting of strontium is difficult to remove
Hydrogen, the modification effect of strontium can be poisoned by easily forming pin hole, and phosphorus, boron, antimony etc..Antimony metamorphic makes Eutectic Silicon in Al-Si Cast Alloys tissue be produced with sheet form
Branch estranged, reaches thinning effect.Antimony is not so good as sodium and strontium to Eutectic Silicon in Al-Si Cast Alloys modification effect, but with being unlikely to be burnt, can repeated revert-melt make
The characteristics of using.The primary silicon and Eutectic Silicon in Al-Si Cast Alloys in transcocrystallized Al-Si alloy can be refined simultaneously by adding 1.0% cerium, 0.3% it is dilute
Earth elements lanthanum can effectively facilitate Eutectic Silicon in Al-Si Cast Alloys and be changed into graininess.
Although using chemometamorphism agent thick needle shaped eutectic silicon can be made to be changed into threadiness, Eutectic Silicon in Al-Si Cast Alloys is not
Optimum state.If Eutectic Silicon in Al-Si Cast Alloys can be made to be changed into pelletiod, the mechanical property of cocrystallized Al-Si alloy will be further enhanced.
The nodularization time of silicon phase is longer in the prior art, and production efficiency is relatively low.Currently for hypereutectic al-si fast spheroidizing annealing research compared with
It is many, it is general preferably to promote and realize primary silicon and Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing using the method for Metamorphism treatment, also there is use
Conventional heat treatment method is to its fast spheroidizing annealing, and transcocrystallized Al-Si alloy both containing primary silicon or contained Eutectic Silicon in Al-Si Cast Alloys, to hypereutectic
For alusil alloy, due to the easy nodularization of primary silicon, the primary silicon after nodularization can induce eutectic equivalent to a kind of nodularization core
Nodularization also occurs for silicon, in subsequent process of setting, due to the presence of primary silicon, and the silicon in liquid phase is more likely to having existed
Primary silicon enrichment and it is grown up, it is suppressed that the growth of Eutectic Silicon in Al-Si Cast Alloys so that Eutectic Silicon in Al-Si Cast Alloys quantity is less in eutectic structure, its size
Also it is more tiny, now using Metamorphism treatment or heat treatment Eutectic Silicon in Al-Si Cast Alloys can be made to be easier to obtain nodularization, therefore to hypereutectic
The research of aluminium silicon ball is relatively easy to and ripe.For cocrystallized Al-Si alloy, the object of nodularization is Eutectic Silicon in Al-Si Cast Alloys, Eutectic Silicon in Al-Si Cast Alloys
Nodularization difficulty is much higher than the Eutectic Silicon in Al-Si Cast Alloys in transcocrystallized Al-Si alloy, therefore delays currently for the progress of eutectic aluminum-silicon nodularization
Slowly, the problem of without a kind of simple and quick processing method to solve eutectic aluminum-silicon nodularization.
The content of the invention
The technical problem to be solved in the present invention is, in order that the Eutectic Silicon in Al-Si Cast Alloys obtained in cocrystallized Al-Si alloy obtains fast spheroidizing annealing,
The present invention provides Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in a kind of cocrystallized Al-Si alloy, to increase substantially in cocrystallized Al-Si alloy
The nodularization efficiency of Eutectic Silicon in Al-Si Cast Alloys.
The technical solution adopted for the present invention to solve the technical problems is, Eutectic Silicon in Al-Si Cast Alloys fire ball in a kind of cocrystallized Al-Si alloy
Change processing method, concrete operation step includes：
1. using well-type electric furnace melting Al-12.6wt.%Si eutectic alloys in graphite crucible, aluminium alloy is poured into metal
In type, diameter 5-15mm, height 100mm cylindrical cocrystallized Al-Si alloy sample is made；
Carried out 2. sample made from step 1 is put into 582~637 DEG C of tubular annealing stove at 1~60min spheroidizings
Reason；
Wherein, 577 DEG C be eutectic aluminum-silicon eutectic temperature point, the cocrystallized Al-Si alloy at a temperature of 582~637 DEG C locates completely
In liquid phase region.
3. after annealing, the sample of step 2 spheroidizing processing is taken out and cooled down.
Preferably, diameter 10mm, height 100mm cylindrical cocrystallized Al-Si alloy sample are made in step 1.
Preferably, in step 2 to sample spheroidizing treatment conditions be 587 DEG C under the conditions of annealing 1~60min, 607 DEG C
Under the conditions of annealing 1~60min or 627 DEG C under the conditions of anneal 1~60min.
Preferably, being annealing 25min, 607 DEG C of bars under the conditions of 587 DEG C to sample spheroidizing treatment conditions in step 2
Anneal and annealed 5min under the conditions of 15min or 627 DEG C under part, so do be on the basis of 95% Eutectic Silicon in Al-Si Cast Alloys nodularization is ensured, with up to
To the purpose for saving the energy.
Preferably, the type of cooling is misting cooling or air-cooled in step 3, it can so increase production efficiency.
The beneficial effects of the invention are as follows the present invention is by cocrystallized Al-Si alloy 5~60 more than its eutectic temperature (577 DEG C)
DEG C carry out spheroidising in short-term, nodularization is carried out in liquid phase region, spherolitic Eutectic Silicon in Al-Si Cast Alloys is evenly distributed in aluminum substrate, from
And improve the nodularization efficiency of Eutectic Silicon in Al-Si Cast Alloys.With the raising of cocrystallized Al-Si alloy spheroidizing temperature, the nodularization speed of Eutectic Silicon in Al-Si Cast Alloys is bright
Aobvious to improve, nodularization effect is more preferable.It is generally acknowledged that the Eutectic Silicon in Al-Si Cast Alloys nodularization in eutectic aluminum-silicon is difficult, and annealing temperature is high, then eutectic aluminum
Silicon can occur overheat or burn-off phenomenon, so few people by the liquid phase region more than eutectic temperature to cocrystallized Al-Si alloy
Carry out spheroidising to change the mechanical property of cocrystallized Al-Si alloy, more nobody does in-depth study to its fast spheroidizing annealing, and
Fig. 1-3 shows eutectic aluminum-silicon dense structure, does not occur overheat or burn-off phenomenon, therefore the present invention achieves unexpected skill
Art effect.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the metallographic structure figure of the cocrystallized Al-Si alloy of 587 DEG C of annealings.Aluminum alloy chemical composition (wt%) is
Si：12.6, annealing time is respectively：(a) 0min (original structure), (b) 5min, (c) 10min, (d) 15min, (e) 20min,
(f)25min.There are the block primary silicon of very small amount and a large amount of needle shaped eutectic silicons in original structure；587 DEG C of annealing 5min, Eutectic Silicon in Al-Si Cast Alloys is not
There is obvious spherodization；After 587 DEG C of annealing 10min, nodularization occurs for the Eutectic Silicon in Al-Si Cast Alloys for having 10% or so；587 DEG C of annealing 15min
Afterwards, nodularization occurs for the Eutectic Silicon in Al-Si Cast Alloys for having 30% or so；After 587 DEG C of annealing 20min, there is 50% or so Eutectic Silicon in Al-Si Cast Alloys nodularization；587 DEG C are moved back
After fiery 25min, there is 95% or so Eutectic Silicon in Al-Si Cast Alloys nodularization, the nodularization time further increases, the increase of Eutectic Silicon in Al-Si Cast Alloys size, but it is helpless to reality
Now further nodularization.
Fig. 2 is the metallographic structure figure of the cocrystallized Al-Si alloy of 607 DEG C of annealings.Aluminum alloy chemical composition (wt%) is
Si：12.6, annealing time is respectively：(a) 0min (original structure), (b) 5min, (c) 10min, (d) 15min.In original structure
There are the block primary silicon of very small amount and a large amount of gill shape Eutectic Silicon in Al-Si Cast Alloys；Ball occurs for 607 DEG C of annealing 5min, the Eutectic Silicon in Al-Si Cast Alloys for having 10% or so
Change；After 607 DEG C of annealing 10min, nodularization occurs for the Eutectic Silicon in Al-Si Cast Alloys for having 30% or so；After 607 DEG C of annealing 15min, there is 95% or so
Nodularization occurs for Eutectic Silicon in Al-Si Cast Alloys, and the nodularization time further increases, the increase of Eutectic Silicon in Al-Si Cast Alloys size, but is helpless to realize further nodularization.
Fig. 3 is the metallographic structure figure of the cocrystallized Al-Si alloy of 627 DEG C of annealings.Aluminum alloy chemical composition (wt%) is
Si：12.6, annealing time is respectively：A) 0min (original structure), b) 5min.Have in original structure the block primary silicon of very small amount and
A large amount of gill shape Eutectic Silicon in Al-Si Cast Alloys；After 627 DEG C of annealing 5min, nodularization occurs for the Eutectic Silicon in Al-Si Cast Alloys for having 95% or so, and the nodularization time further increases
Plus, the increase of Eutectic Silicon in Al-Si Cast Alloys size, but be helpless to realize further nodularization.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
Embodiment 1
Cocrystallized Al-Si alloy is in 587 DEG C of annealing：
Using well-type electric furnace in graphite crucible melting Al-12.6wt.%Si eutectic alloys, aluminium alloy is poured into metal mold
In, diameter 10mm, height 100mm cylindrical cocrystallized Al-Si alloy sample is made；Sample is put into 587 DEG C of tubular annealing stove
Middle progress 5min spheroidizing processing；It is after annealing, sample taking-up progress is air-cooled, obtain being total under 5min annealing times
Brilliant alusil alloy.According to aforesaid operations step, by spheroidizing processing time be changed to respectively 10min, 15min, 20min,
25min, remaining operation is constant, respectively obtains the cocrystallized Al-Si alloy under 10min, 15min, 20min, 25min annealing time.
Cocrystallized Al-Si alloy metallographic structure figure under 5min, 10min, 15min, 20min, 25min annealing time is as shown in Figure 1.
Embodiment 2
Cocrystallized Al-Si alloy is in 607 DEG C of annealing：
Using well-type electric furnace in graphite crucible melting Al-12.6wt.%Si eutectic alloys, aluminium alloy is poured into metal mold
In, diameter 10mm, height 100mm cylindrical cocrystallized Al-Si alloy sample is made；Sample is put into 607 DEG C of tubular annealing stove
Middle progress 5min spheroidizing processing；It is after annealing, sample taking-up progress is air-cooled, obtain being total under 5min annealing times
Brilliant alusil alloy.According to aforesaid operations step, spheroidizing processing time is changed to 10min, 15min respectively, remaining operation is not
Become, respectively obtain the cocrystallized Al-Si alloy under 10min, 15min annealing time.Being total under 5min, 10min, 15min annealing time
Brilliant alusil alloy metallographic structure figure is as shown in Figure 2.
Embodiment 3
Cocrystallized Al-Si alloy is in 627 DEG C of annealing：
Using well-type electric furnace in graphite crucible melting Al-12.6wt.%Si eutectic alloys, aluminium alloy is poured into metal mold
In, diameter 10mm, height 100mm cylindrical cocrystallized Al-Si alloy sample is made；Sample is put into 627 DEG C of tubular annealing stove
Middle progress 5min spheroidizing processing；It is after annealing, sample taking-up progress is air-cooled, obtain being total under 5min annealing times
Brilliant alusil alloy.Cocrystallized Al-Si alloy metallographic structure figure under 5min annealing times is as shown in Figure 3.
Desirable embodiment described above according to the present invention is enlightenment, passes through above-mentioned description, relevant staff
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' completely.The skill of this invention
Art scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (5)
1. Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in a kind of cocrystallized Al-Si alloy, it is characterised in that the processing method it is specific
Operating procedure includes：
1. using well-type electric furnace melting Al-12.6wt.%Si eutectic alloys in graphite crucible, aluminium alloy is poured into metal mold
In, diameter 5-15mm, height 100mm cylindrical cocrystallized Al-Si alloy sample is made；
The processing of 1~60min spheroidizings is carried out 2. sample made from step 1 is put into 582~637 DEG C of tubular annealing stove；
3. after annealing, the sample of step 2 spheroidizing processing is taken out and cooled down.
2. Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in cocrystallized Al-Si alloy as claimed in claim 1, it is characterised in that step 1
In diameter 10mm, height 100mm cylindrical cocrystallized Al-Si alloy sample is made.
3. Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in cocrystallized Al-Si alloy as claimed in claim 1, it is characterised in that step 2
In be 1~60min of annealing under the conditions of 587 DEG C to sample spheroidizing treatment conditions, under the conditions of 607 DEG C 1~60min of annealing or
Anneal 1~60min under the conditions of 627 DEG C.
4. Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in cocrystallized Al-Si alloy as claimed in claim 1, it is characterised in that step 2
In be annealing 25min, 15min or 627 DEG C of bar of annealing under the conditions of 607 DEG C under the conditions of 587 DEG C to sample spheroidizing treatment conditions
Anneal 5min under part.
5. Eutectic Silicon in Al-Si Cast Alloys fast spheroidizing annealing processing method in cocrystallized Al-Si alloy as claimed in claim 1, it is characterised in that step 3
The middle type of cooling is misting cooling or air-cooled.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055789A (en) * | 2018-08-10 | 2018-12-21 | 常州大学 | A kind of cocrystallized Al-Si alloy from metamorphism treatment method |
| CN112010312A (en) * | 2019-06-01 | 2020-12-01 | 通用汽车环球科技运作有限责任公司 | System and method for producing high purity fines |
| CN113444899A (en) * | 2021-06-15 | 2021-09-28 | 常州大学 | Method for refining primary silicon in Al-18Si hypereutectic aluminum-silicon alloy |
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| JPH02141543A (en) * | 1988-11-24 | 1990-05-30 | Suzuki Motor Co Ltd | Manufacture of al-si alloy |
| KR0166339B1 (en) * | 1996-04-10 | 1999-01-15 | 서상기 | Method for manufacturing al-si hyper eutectic semi-melted metal alloy |
| EP1239054A1 (en) * | 2001-03-07 | 2002-09-11 | Bayerische Motoren Werke Aktiengesellschaft | Heat treatment of hypereutectic Al-Si alloys |
| CN104745984A (en) * | 2013-12-26 | 2015-07-01 | 青岛玉光精铸厂 | Heat treatment process for hypereutectic aluminum silicon alloy |
| CN106367700A (en) * | 2016-10-17 | 2017-02-01 | 常州大学 | Method for spheroidizing heat treatment of eutectic silicon in eutectic aluminium-silicon alloy |
-
2017
- 2017-05-02 CN CN201710299942.8A patent/CN107201488A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02141543A (en) * | 1988-11-24 | 1990-05-30 | Suzuki Motor Co Ltd | Manufacture of al-si alloy |
| KR0166339B1 (en) * | 1996-04-10 | 1999-01-15 | 서상기 | Method for manufacturing al-si hyper eutectic semi-melted metal alloy |
| EP1239054A1 (en) * | 2001-03-07 | 2002-09-11 | Bayerische Motoren Werke Aktiengesellschaft | Heat treatment of hypereutectic Al-Si alloys |
| CN104745984A (en) * | 2013-12-26 | 2015-07-01 | 青岛玉光精铸厂 | Heat treatment process for hypereutectic aluminum silicon alloy |
| CN106367700A (en) * | 2016-10-17 | 2017-02-01 | 常州大学 | Method for spheroidizing heat treatment of eutectic silicon in eutectic aluminium-silicon alloy |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055789A (en) * | 2018-08-10 | 2018-12-21 | 常州大学 | A kind of cocrystallized Al-Si alloy from metamorphism treatment method |
| CN112010312A (en) * | 2019-06-01 | 2020-12-01 | 通用汽车环球科技运作有限责任公司 | System and method for producing high purity fines |
| CN113444899A (en) * | 2021-06-15 | 2021-09-28 | 常州大学 | Method for refining primary silicon in Al-18Si hypereutectic aluminum-silicon alloy |
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Application publication date: 20170926 |