CN109722555A - A kind of cast aluminium alloy gold grain refinement and modification method - Google Patents
A kind of cast aluminium alloy gold grain refinement and modification method Download PDFInfo
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- CN109722555A CN109722555A CN201910021016.3A CN201910021016A CN109722555A CN 109722555 A CN109722555 A CN 109722555A CN 201910021016 A CN201910021016 A CN 201910021016A CN 109722555 A CN109722555 A CN 109722555A
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Abstract
The invention discloses a kind of cast aluminium alloy gold grain refinement and modification methods, the following steps are included: (1) prepares aluminium alloy grain refinement and modification intermediate alloy Al-Sr-P-B, the intermediate alloy ingredient are as follows: strontium 0.5-5%, phosphorus 0.5-3%, boron 0.5-3%, surplus are aluminium；The preparation method of the intermediate alloy is to weigh a certain amount of fine aluminium, Al-10Sr intermediate alloy, Al-3P intermediate alloy and Al-3B intermediate alloy in proportion, stirs evenly ingot of casting after slagging-off is stood after each intermediate alloy melting is separately added into after melting fine aluminium.(2) aluminium alloy (such as aluminium silicon, aluminium silicon magnesium cast aluminium alloy gold) is melted, Al-Sr-P-B intermediate alloy is added and is sufficiently stirred and refines.(3) casting and forming after heat preservation is stood.Grain refinement and modification method of the present invention is low in cost, simple process, and grain refinement and modification is high-efficient, effect stability, and is generally applicable to the common cast aluminium alloy golds such as aluminium silicon systems and aluminum-silicon-magnesium.
Description
Technical field
The present invention relates to a kind of aluminum grain refinement Modification Manners more particularly to a kind of use intermediate alloy fine degenerates
The cast aluminium alloy golds such as aluminium silicon, aluminium silicon magnesium.
Technical background
Aluminium alloy with its resource, significant low-density and high specific strength abundant become it is current most attractive and most have before
The structural metallic materials on way.The advantages of aluminium alloy, is very prominent, and in addition to light weight, specific strength are high, molding and processing performance are excellent, hot
Conductance is high and weatherability is strong；It is set to occupy consequence in the industry, especially using aluminium silicon systems and aluminum-silicon-magnesium as representative
Cast aluminium alloy gold should be the most universal, is widely used in the industries such as aerospace, machinery, automobile, household electrical appliances, electronics and communication.With
The development of modern industry, every profession and trade are higher and higher to the performance requirement of material, therefore are representative for aluminium silicon systems and aluminum-silicon-magnesium
Cast aluminium alloy gold it is usually necessary to use fine degenerate processing to improve tissue topography's feature of alloy to improve material property
Meet application demand.
It is more abundant for the fine degenerate technical study of cast aluminium alloy gold, but lack a kind of blanket effective thin
Change Modification Manners.By taking common casting alloy as an example, for the A356 alloy of hypoeutectic structure, can add Al-Ti-B, Al-Ti-C,
The fining agents such as Al-Sr and alterant can generate preferable effect to α-Al and common reciever；The ADC12 of eutectic structure is closed
Gold can add common reciever, α-Al phase and other influences alloy property that Al-Sr, Al-RE and Al-Mn are separately optimized in alloy
Composition phase (such as Fe phase)；For the ADC14 alloy of hypereutectic tissue, commonly uses Cu-P, Cu-Sb middle needle and primary Si phase is carried out
Metamorphism treatment.As seen from the above, usually a kind of intermediate alloy is only applicable to single in the aluminium alloy of a certain special category
Form phase, and such as TiB in use2、AlTi3Because of agglomeration, P, Sb element addition high scaling loss of temperature are serious and add
The Cu and other elements entered, which can change the ingredient of alloy and generate relative material, causes secondary damage both and influences alloy refinement rotten
Effect is also unprofitable to the promotion of performance, the easy scaling loss of the Al-RE and factors such as at high cost will affect alloy refinement modification effect, it is difficult to protect
Demonstrate,prove economy and permanent validity.A kind of pair of alloy universality height is developed thus, change mutually can be refined effectively to each important composition
Matter, simple process long-term methods be particularly important.
Summary of the invention
In order to overcome the disadvantage and deficiency in the prior art, the purpose of the present invention is to provide a kind of universality casting aluminium to close
Golden grain refinement and modification method.Pass through the rotten cast aluminium alloy golds such as aluminium silicon and aluminium silicon magnesium (copper) of Al-Sr-P-B intermediate alloy, pairing
α-Al phase, common reciever, primary Si phase, nascent Mg in payment organization2Si phase and other important compositions mutually realize that effectively refinement becomes
Matter improves alloy structure shape characteristic, to effectively improve the performance of alloy material.This method is applied widely, fine degenerate
Effect stability is reliable, simple process, pollution-free in operating process.
The invention is realized by the following technical scheme:
(1) aluminium alloy grain refinement and modification intermediate alloy Al-Sr-P-B is prepared
According to the specific ingredient for the intermediate alloy Al-Sr-P-B being pre-designed, a certain amount of fine aluminium, Al- are weighed in proportion
10Sr intermediate alloy, Al-3P intermediate alloy and Al-3B intermediate alloy, addition when after melting fine aluminium at 700-800 DEG C
Al-3B, Al-10Sr and Al-3P intermediate alloy stir evenly after melting, ingot of casting after slagging-off standing.(Al-10Sr, that is, Sr exists
Shared mass percent is 10% in Al-Sr alloy, other same representation methods are analogized)
(2) fusing aluminium alloy adds fine degenerate intermediate alloy
It melts aluminium alloy (including but not limited to cast aluminium alloy golds such as aluminium silicon, aluminium silicon magnesium), at 680-780 DEG C, is added one
Fine degenerate intermediate alloy obtained, is sufficiently stirred after fusing in the step of certainty ratio content (1), in 700-760 DEG C of standing 5-
After 30min, it is passed through nitrogen refining.
(3) casting and forming
After refining slagging-off after 680-780 DEG C of heat preservation standing 5-30min casting and forming.
Al-Sr-P-B intermediate alloy ingredient in step (1) are as follows: strontium 0.5-5%, phosphorus 0.5-3%, boron 0.5-3%, surplus
For aluminium.
The Al-Sr-P-B intermediate alloy quality being added in step (2) is the 0.05-5% of aluminium alloy melt weight.
It is blown into the also refining agent C of melt in step (2) together with nitrogen2Cl6, additive amount 0.5-2%.
Casting and forming mode in step (3) includes gravitational casting, compression casting, low pressure casting, extrusion casint and liquid
The modes such as die forging.
The beneficial effects of the present invention are:
Fine degenerate method of the invention has a wide range of application, and can be generally applicable to the casting aluminium such as aluminium silicon and aluminium silicon magnesium (copper) and close
Gold.
The present invention is dexterously mutually able to achieve effectively each generation in aluminum alloy organization using a variety of fine degenerate elements
Fine degenerate, sufficiently raising alloy property.
Operation of the present invention is simple and easy, and process is short, pollution-free generation, it is easy to accomplish large-scale production.
Detailed description of the invention
Fig. 1 is the metallographic structure figure of the 1# aluminium alloy handled without fine degenerate.
Fig. 2 is the metallographic structure figure for being made fine degenerate through embodiment 1 treated 1# aluminium alloy.
Fig. 3 is the metallographic structure figure of the 2# aluminium alloy handled without fine degenerate.
Fig. 4 is the metallographic structure figure for being made fine degenerate through embodiment 2 treated 2# aluminium alloy.
Fig. 5 is the metallographic structure figure of the 3# aluminium alloy handled without fine degenerate.
Fig. 6 is the metallographic structure figure for being made fine degenerate through embodiment 3 treated 3# aluminium alloy.
Specific embodiment
Below with reference to embodiment, invention is further described in detail, and embodiments of the present invention are not limited thereto.
The fine degenerate of 1 1# aluminium alloy of embodiment is handled
(1) aluminium alloy grain refinement and modification intermediate alloy Al-Sr-P-B is prepared
According to the specific ingredient for the intermediate alloy Al-Sr-P-B being pre-designed, Al-3Sr-P-B is such as prepared；It weighs in proportion
Fine aluminium 1Kg, Al-10Sr intermediate alloy 9Kg, Al-3P intermediate alloy 10Kg and Al-3B intermediate alloy 10Kg, melts by fine aluminium
Al-3B, Al-10Sr and Al-3P intermediate alloy is added after change at 720 DEG C, is stirred evenly after melting, slagging-off is cast into after standing
Al-3Sr-P-B intermediate alloy is made in ingot.
(2) fusing aluminium alloy adds fine degenerate intermediate alloy
Melt 1# aluminium alloy, at 720 DEG C, be added 1% (mass ratio, similarly hereinafter) the step of (1) in fine degenerate obtained
Intermediate alloy is sufficiently stirred after fusing, after 720 DEG C of standing 20min, be passed through nitrogen and be blown into 1% C2Cl6Refining agent degasification
Refining.
(3) casting and forming
Gravitational casting forms after 720 DEG C of heat preservations stand 15min after refining slagging-off.
Fig. 1 is the metallographic structure figure of the 1# aluminium alloy handled without fine degenerate, and Fig. 2 is that refinement is made through the present embodiment to become
The metallographic structure figure of matter treated 1# aluminium alloy.Comparison diagram 1 and Fig. 2 can be seen that alloy structure and be obviously improved, crystal grain refinement
Significant effect, especially common reciever become threadiness from dendroid, and in addition α-Al phase interdendritic is away from reduction.Show this method energy
Effectively optimization 1# aluminum alloy organization.
The fine degenerate of 2 2# aluminium alloy of embodiment is handled
(1) aluminium alloy grain refinement and modification intermediate alloy Al-Sr-P-B is prepared
The preparation of Al-Sr-P-B intermediate alloy is identical as the method in embodiment 1.
(2) fusing aluminium alloy adds fine degenerate intermediate alloy
2# aluminium alloy is melted, at 730 DEG C, refinement obtained change in the step of 1.5% (mass ratio, similarly hereinafter) is added (1)
Matter intermediate alloy is sufficiently stirred after fusing, after 730 DEG C of standing 30min, be passed through nitrogen and be blown into 1.5% C2Cl6Refining agent
Refinery by de-gassing.
(3) casting and forming
Gravitational casting forms after 720 DEG C of heat preservations stand 20min after refining slagging-off.
Fig. 3 is the metallographic structure figure of the 2# aluminium alloy handled without fine degenerate, and Fig. 4 is that refinement is made through the present embodiment to become
The metallographic structure figure of matter treated 2# aluminium alloy.It is total that comparison diagram 3 and Fig. 4 can be seen that α-Al phase, sheet in alloy structure
Brilliant Si phase, blocky-shaped particle reinforced phase are more uniformly spread, while size is obviously reduced, alloy structure obtain good improvement with it is thin
Change.
The fine degenerate of 3 3# aluminium alloy of embodiment is handled
(1) aluminium alloy grain refinement and modification intermediate alloy Al-Sr-P-B is prepared
The preparation of Al-Sr-P-B intermediate alloy is identical as the method in embodiment 1.
(2) fusing aluminium alloy adds fine degenerate intermediate alloy
Melt 3# aluminium alloy, at 750 DEG C, be added 3% (mass ratio, similarly hereinafter) the step of (1) in fine degenerate obtained
Intermediate alloy is sufficiently stirred after fusing, after 750 DEG C of standing 20min, be passed through nitrogen and be blown into 1.5% C2Cl6Refining agent removes
Gas refining.
(3) casting and forming
After refining slagging-off after 720 DEG C of heat preservations standing 20min squeeze cast form.
Fig. 5 is the metallographic structure figure of the 3# aluminium alloy handled without fine degenerate, and Fig. 6 is that refinement is made through the present embodiment to become
The metallographic structure figure of matter treated 3# aluminium alloy.Comparison diagram 5 and Fig. 6 can be seen that primary Si phase is changed by irregular bulk
More mellow and full graininess, more uniformly spreads and size is obviously reduced；α-Al is mutually refined uniformly, the common reciever that branch is crystalline
Also reduce is in tiny rod-short.Meanwhile the fine degenerate effect of the alloy handled using this method is had no in 4 hours and is obviously declined
Move back phenomenon.
Following table is the main chemical compositions of each aluminium alloy in above embodiments:
| Si | Cu | Fe | Mg | Al | |
| 1# aluminium alloy | 7.1 | / | 0.18 | 0.33 | Surplus |
| 2# aluminium alloy | 10.2 | 1.98 | 0.15 | 0.35 | Surplus |
| 3# aluminium alloy | 16.5 | 4.32 | 0.48 | 0.52 | Surplus |
Claims (5)
1. a kind of cast aluminium alloy gold grain refinement and modification method, which comprises the following steps:
(1) aluminium alloy grain refinement and modification intermediate alloy Al-Sr-P-B is prepared
According to the specific ingredient for the intermediate alloy Al-Sr-P-B being pre-designed, a certain amount of fine aluminium is weighed in proportion, in Al-10Sr
Between alloy, Al-3P intermediate alloy and Al-3B intermediate alloy, when after fine aluminium is melted at 700-800 DEG C be added Al-3B,
Al-10Sr and Al-3P intermediate alloy stirs evenly after melting, ingot of casting after slagging-off standing；
(2) fusing aluminium alloy adds fine degenerate intermediate alloy
Aluminium alloy is melted, aluminium alloy is including but not limited to aluminium silicon systems and aluminum-silicon-magnesium alloy, at 680-780 DEG C, is added certain
Fine degenerate intermediate alloy obtained, is sufficiently stirred after fusing in the step of proportional amount (1), in 700-760 DEG C of standing 5-
After 30min, it is passed through nitrogen refining；
(3) casting and forming
After refining slagging-off after 680-780 DEG C of heat preservation standing 5-30min casting and forming.
2. cast aluminium alloy gold grain refinement and modification method according to claim 1.It is characterized by: the Al- in step (1)
Sr-P-B intermediate alloy ingredient are as follows: strontium 0.5-5%, phosphorus 0.5-3%, boron 0.5-3%, surplus are aluminium.
3. cast aluminium alloy gold grain refinement and modification method according to claim 1.It is characterized by: being added in step (2)
Al-Sr-P-B intermediate alloy quality be aluminium alloy melt weight 0.05-5%.
4. cast aluminium alloy gold grain refinement and modification method according to claim 1.It is characterized by: with nitrogen in step (2)
Gas is blown into the also refining agent C of melt together2Cl6, additive amount 0.5-2%.
5. cast aluminium alloy gold grain refinement and modification method according to claim 1.It is characterized by: the casting in step (3)
Making molding mode includes gravitational casting, compression casting, low pressure casting, extrusion casint and liquid forging mode.
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| US3466170A (en) * | 1966-01-13 | 1969-09-09 | Metallgesellschaft Ag | Process for improving grain structure of aluminum silicon alloys |
| CN1546708A (en) * | 2003-12-03 | 2004-11-17 | 东华大学 | Aluminum silicon alloy series possessing granulated silicon phase and its process |
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