CN110129630A - A kind of high tough thin-walled workpiece cast aluminium alloy gold and preparation method thereof - Google Patents
A kind of high tough thin-walled workpiece cast aluminium alloy gold and preparation method thereof Download PDFInfo
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- CN110129630A CN110129630A CN201910438346.2A CN201910438346A CN110129630A CN 110129630 A CN110129630 A CN 110129630A CN 201910438346 A CN201910438346 A CN 201910438346A CN 110129630 A CN110129630 A CN 110129630A
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/007—Semi-solid pressure die casting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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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- 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
- C22F1/047—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 magnesium as the next major constituent
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Abstract
The present invention relates to aluminum alloy processing technology fields more particularly to a kind of high tough thin-walled workpiece cast aluminium alloy gold and preparation method thereof.The aluminium alloy includes following components, and the content of each component is as follows in terms of weight percentage: Al 86.98~96.73%, Si 3.00~10.00%, Mg 0.10~1.00%, Mn 0.10~1.00%, Sr 0.01~0.10%, B 0.01~0.12%, Ti 0.05-0.20%, Fe≤0.60%；Also, ratio C 1=B/Sr >=1.00 of weight percent.High tough aluminium alloy of the invention, on the basis of optimizing Si, Mg, Mn main alloying element, add Ti, B element refines α-Al crystal grain, add Sr element fine degenerate common reciever, and control the content of these elements and impurity element, make its mutual cooperation, the aluminium alloy made has high-intensitive, excellent toughness and excellent die-casting process performance.
Description
Technical field
The present invention relates to aluminum alloy processing technology field more particularly to a kind of high tough thin-walled workpiece cast aluminium alloy gold and
Preparation method.
Background technique
Cast aluminium alloy gold part is widely used in fields such as electric meter, automobile and motorcycle, communications.With automobile, machinery etc.
Field is thinning casting, light-weighted requires higher and higher, high-mechanic, thin-walled irony knot in some workpiece such as body of a motor car
Component changes to be shaped by aluminium-alloy pressure-casting, this, which requires alloy not only, should meet conventional no hot tearing, segregation-free phenomenon, can be carried out
The filling and molding of thin-section casting, also especially require casting have after being suitably heat-treated high-intensitive, high-elongation with
And high tenacity.
The current extensive Al-Si-Cu system of domestic and international application (domestic YL112, YL113, Japanese ADC12, ADC10, the U.S.
A380 etc.), (aluminium alloy is generally anti-for Al-Si-Mg system (domestic YL104, Japanese ADC3, U.S. A360 etc.) conventional non-vacuum die casting
Tensile strength be 220-240MPa, elongation percentage≤3%, far can not meet the performance requirement of high-intensity and high-tenacity, especially poor toughness,
It is low that military service process is easy fatigue cracking, toughness.
It is excellent by designing there is an urgent need under conventional cast technique for the present Research of high-strength and high ductility pack alloy
Change Al-Si system diecasting alloys ingredient, improve the institutional framework of alloy by structure refinement Metamorphism treatment, develops casting character
The cast aluminium alloy gold of excellent, high-strength high-plastic high-ductility, to meet the performance requirement of high-mechanic, thin-walled die casting structure part.
Summary of the invention
It is an object of the invention to for above-mentioned there are problem and shortage, by Al, Si in optimization design alloy, Mg, Mn,
The content of Sr, B, Ti and Fe inhibit β-AlFesi impurity phase to generate by step 1S, 2S, 3S, 4S, 5S, provide a kind of high-strength
Tough thin-walled workpiece cast aluminium alloy gold and preparation method thereof.
According to an aspect of the present invention, a kind of high tough thin-walled workpiece cast aluminium alloy gold, the aluminium alloy packet are provided
Following components are included, and the content of each component is as follows in terms of weight percentage: Al 86.98~96.73%, Si 3.00~
10.00%, Mg 0.10~1.00%, Mn 0.10~1.00%, Sr0.01~0.10%, B 0.01~0.12%, Ti
0.05-0.20%, Fe≤0.60%；Also, ratio C 1=B/Sr >=1.00 of weight percent.
Wherein, the content of each component is as follows in terms of weight percentage: Al 89.79~95.45%, Si4.00~
8.00%, Mg 0.25~0.75%, Mn 0.20~0.80%, Sr 0.01~0.08%, B 0.01~0.10%, Ti
0.08-0.18%, Fe≤0.30%；Also, ratio C 1=B/Sr >=1.00 of weight percent.
Wherein, the content of each component is as follows in terms of weight percentage: Al 91.35~94.23%, Si5.00~
7.00%, Mg 0.35~0.60%, Mn 0.30~0.60%, Sr 0.01~0.05%, B 0.01~0.05%, Ti
0.10-0.15%, Fe≤0.20%；Also, ratio C 1=B/Sr >=1 of weight percent.
Wherein, the range of the ratio C 1=B/Sr of weight percent is 1.00~1.50.
Wherein, the range of the ratio C 2=Ti/B of weight percent is 2.40~7.50.
Wherein, the range of the ratio C 2=Ti/B of weight percent is 3.00~5.00.
According to another aspect of the present invention, a kind of preparation side of high tough thin-walled workpiece cast aluminium alloy gold is additionally provided
Method, the preparation method comprises the following steps:
1S ingredient: raw material silicon source, magnesium source, silicon source, titanium source, manganese source, boron source, barium source, source of iron are taken by a group distribution, aluminium is prepared and closes
Golden raw material；
2S melting and die casting: the raw material that step 1S is prepared heats melting, obtains melt solution；The melt solution is carried out
Stirring, and it is cast as ingot casting；
3S homogenization: the ingot casting that step 2S is obtained carries out homogenization heat treatment at 540~560 DEG C, keeps the temperature 3~5h,
Water hardening.
4S solid solution: the alloy that step 3S is obtained is dissolved at 540~560 DEG C, keeps the temperature 1~3h, water quenching；
5S timeliness: the alloy that step 4S is obtained carries out artificial aging at 160~180 DEG C, 2~8h is kept the temperature, after cooling
Obtain high tough aluminium alloy.
Wherein, in step 1S, the silicon source is Al-20Si alloy, the magnesium ingot that the magnesium source is 99.95%, the aluminium
The aluminium ingot that source is 99.8%, the titanium source are Al-10Ti alloy, and the manganese source is Al-40Mn alloy, and the barium source is Al-
10Sr alloy, the boron source are Al-5Ti-1B alloy, the iron powder or ferro-aluminum intermediate alloy that the source of iron is 99.95%.
Wherein, in step 2S, smelting temperature is 730~760 DEG C；The stirring means include that mechanical stirring, electromagnetism stir
It mixes or ultrasonic vibration method.
According to the third aspect of the present invention, a kind of application of aforementioned aluminium alloy in semisolid pressure casting production is provided.
The effect of each element and content are described as follows in the high-perforance compression casting aluminium alloy:
Si element can form Al+Si eutectic liquid phase with Al in aluminium alloy, improve the die casting mobility of aluminium alloy, simultaneously also
The intensity and machining property of aluminium alloy can be improved.Si content is higher, and eutectic liquid phase is more, and the die casting mobility of aluminium alloy is got over
It is good, but the toughness of pack alloy can decline.Therefore, in order to guarantee aluminium alloy have enough die casting mobility and toughness, Si
Weight percent content range can be limited to 3.00~10.00%.Preferably, the weight percent content range of Si can be with
It is limited to 4.00~8.00%.It is highly preferred that the weight percent content range of Si can be limited to 5.00~7.00%.
Mg element can form Mg with Si in pack alloy2Si hardening constituent enhances the intensity of pack alloy, Mg content
Higher, the intensity of pack alloy is also higher, but toughness can be gradually reduced.Therefore, in order to guarantee pack alloy intensity and
The weight percent content range of toughness, Mg can be limited to 0.10~1.00%.Preferably, the weight percent content model of Mg
0.25~0.75% can be limited to by enclosing.It is highly preferred that the weight percent content range of Mg can be limited to 0.35~
0.60%.
Mn element can form Mn with Si in pack alloy2Si hardening constituent enhances the intensity of pack alloy, Mn content
Higher, the intensity of pack alloy is also higher, but toughness can be gradually reduced.Also, the content of Mn excessively will then form a large amount of
Insoluble coarse InterMetallic Compound, so that the mobility of aluminium alloy is reduced, to influence the intensity and toughness of aluminium alloy.Cause
This, the weight percent content range of Mn can be limited to 0.10~1.00%.Preferably, the weight percent content range of Mn
It can be limited to 0.20~0.80%.It is highly preferred that the weight percent content range of Mn can be limited to 0.30~0.60%.
Ti element primarily serves the effect of refinement α-Al crystal grain in pack alloy, and the structural constituent for improving aluminium alloy is equal
Even property improves the mobility, intensity and toughness of pack alloy.For Ti content less than 0.05%, grain refining effect is unobvious.Ti
Content is higher, and grain refining effect is better, but when Ti content is more than 0.20%, also results in coarse InterMetallic Compound TiAl3
The appearance of phase deteriorates the intensity and toughness of pack alloy.Therefore, the weight percent content range of Ti can be limited to 0.05
~0.20%.Preferably, the weight percent content range of Ti can be limited to 0.08~0.18%.It is highly preferred that the weight of Ti
Amount degree range can be limited to 0.10~0.15%.
Sr element primarily serves the fine degenerate effect to common reciever in pack alloy.Common reciever is in aluminium alloy
In be usually all in elongated needle-shaped, it is to lead to traditional pressure that this elongated needle-shaped common reciever, which can also isolate alloy matrix aluminum,
Cast aluminium alloy intensity and the lower major reason of toughness.The prior art mainly adds Na to the fine degenerate of common reciever, but
That there is also fine degenerate effects is unstable, is easy the problems such as causing air-breathing for Na element at present.Inventor passes through lot of experiments
It was found that Sr element has good fine degenerate effect to the common reciever of pack alloy of the present invention, effect is obvious
Be better than traditional Na element, there are also stablize, the duration is long, reproducibility is good the advantages that, traditional Na element can also be avoided thin
Change rotten caused air-breathing problem.Addition 0.01~0.10% Sr element, can make the form of eutectic Si in pack alloy from
The elongated needle-shaped graininess for being changed into fine uniform, significantly improves the intensity and toughness of pack alloy.Preferably, the weight of Sr
Amount degree range can be limited to 0.01~0.08%.It is highly preferred that the weight percent content range of Sr can limit
It is set to 0.01~0.05%.
B element primarily serves the effect of refinement α-Al crystal grain in pack alloy, and the structural constituent for improving aluminium alloy is equal
Even property improves the mobility, intensity and toughness of pack alloy.Therefore, the weight percent content range of B can be limited to
0.01~0.12%.Preferably, the weight percent content range of B can be limited to 0.01~0.10%.It is highly preferred that B
Weight percent content range can be limited to 0.01~0.05%.
Fe element can improve the mechanical strength and tensile property of alloy, and Fe can also significantly improve the creep-resistant property of alloy
And anti-fatigue performance, but excessive Fe can form coarse needle-shaped Al-Fe-Si system richness Fe phase in aluminium alloy, it is this thick
Big needle-shaped richness Fe, which meets, seriously isolates alloy matrix aluminum, is to lead to traditional pack alloy intensity and the lower main original of toughness
Cause.Inventor has found that the content of Impurity Fe is controlled≤0.60%, preferably in pack alloy by lot of experiments
Ground, the content control of Fe is ≤0.30%, it is highly preferred that the content of Fe is controlled≤0.20%.
Further further investigation, inventors have found that Sr and B have reciprocation, as the ratio C 1=of control weight percent
B/Sr >=1.00, reciprocation forms tiny SrB6 compound particle phase between the two, and quantity is seldom, is present in the center dendrite α；
As C1=B/Sr < 1.00, particle size becomes larger, quantity increases, and appears in eutectic area mostly, and the formation of Sr-B compound disappears
A large amount of Sr and B has been consumed, Sr is resulted in, mutually poisoning between B weakens the modification effect of Was Used.Preferably, weight hundred is controlled
The range for dividing the ratio C 1=B/Sr of ratio is 1.00~1.50, and this mutual poisoning effect is most weak, and Was Used can achieve good
Modification effect, to make pack alloy that there is fabulous mechanical strength and toughness.
Further research inventor also found that during alloy refinement, Al-Ti-B ratio Al-Ti alloy refinement efficiency is more
Height, Ti dosage is less, and being added, which will make to forge on a small quantity tissue, generates very big variation, but in quiescing process, due to sinking for B
It forms sediment, refining effect subsides quickly.Precipitating by adjusting the content of Ti element and B element than that can slow down B element makees refinement
With more longlasting, to make pack alloy that there is fabulous mechanical strength and toughness.Therefore, the ratio C 2 of weight percent is controlled
The range of=Ti/B be 2.40~7.50, it is preferable that control the ratio C 2=Ti/B of weight percent range be 3.00~
5.00。
In addition, the present invention provides a kind of preparation method of above-mentioned tough thin-walled workpiece cast aluminium alloy gold of height, the system
Preparation Method the following steps are included:
1S ingredient: raw material silicon source, magnesium source, silicon source, titanium source, manganese source, boron source, barium source, source of iron are taken by a group distribution, aluminium is prepared and closes
Golden raw material；
2S melting and die casting: the raw material that step 1S is prepared heats melting, obtains melt solution；The melt solution is carried out
Stirring, and it is cast as ingot casting；
3S homogenization: the ingot casting that step 2S is obtained carries out homogenization heat treatment at 540~560 DEG C, keeps the temperature 3~5h,
Water hardening.
4S solid solution: the alloy that step 3S is obtained is dissolved at 540~560 DEG C, keeps the temperature 1~3h, water quenching；
5S timeliness: the alloy that step 4S is obtained carries out artificial aging at 160~180 DEG C, 2~8h is kept the temperature, after cooling
Obtain high tough aluminium alloy.
Above-mentioned preparation method is according to 1S)~5S) sequence successively carry out.
In step 1S, silicon source is Al-20Si alloy, the magnesium ingot that magnesium source is 99.95%, the aluminium ingot that silicon source is 99.8%, titanium
Source is Al-10Ti alloy, and manganese source is Al-40Mn alloy, and barium source is Al-10Sr alloy, and boron source is Al-5Ti-1B alloy, source of iron
For 99.95% ingot iron, impurity element is controlled, it is ensured that pack alloy obtains high-intensitive and high tenacity.
In step 2S, the resulting raw material of step 1S is added in induction melting furnace, by vacuumizing, leads to argon gas, 730
Melting at a temperature of~760 DEG C, obtains melt solution；Using mechanical stirring, electromagnetic agitation or ultrasonic vibration method, stirring 8~
10min is cast as ingot casting.
In step 3S, the ingot casting that step 2S is obtained carries out homogenization heat treatment at 540~560 DEG C, keeps the temperature 3~5h,
Water hardening.
In step 4S, the alloy that step 3S is obtained is dissolved at 540~560 DEG C, keeps the temperature 1~3h, water quenching to room
Temperature.
In step 5S, the alloy that step 4S is obtained carries out artificial aging at 160~180 DEG C, keeps the temperature 2~8h, cooling
Afterwards high tough aluminium alloy.
Pack alloy in the present invention has the advantage that 1) the high tough thin-wall construction of the present invention compared with other aluminium alloys
Part cast aluminium alloy gold is made of elements such as Si, Mg, Mn, on the basis of optimizing Si, Mg, Mn main alloying element, addition Ti, B member
Element refinement α-Al crystal grain, introducing Sr element makes the spheric granules of coarse needle-shaped Si particle fine degenerate fine uniform, simultaneously
Regulated and controled by ingredient, β-AlFesi is inhibited to generate, improve the structural constituent uniformity of aluminium alloy, improves aluminium alloy in press casting procedure
Mobility, intensity and plasticity；2) alloy is not adding expensive rare earth member by the ratio of further control B, Sr and Ti
It is tough that height is realized in the case where plain (such as Sc, Zr etc.), and there is advantage in terms of cost；3) heat based on Xi Er SOLIDIFICATION MODEL
Mechanics Calculation shows that the solid-liquid section in alloy (embodiment 3) process of setting is 70 DEG C, is appropriate for semisolid pressure casting
Production；4) high-performance aluminium alloy of the invention, tensile strength are 188~358MPa, and yield strength is 150~333MPa, elongation
Rate is 8.0~23.0%, is suitable for squeezing die-casting process preparation, be satisfied with needed for the fields such as automobile, electronic apparatus, high-end equipment
High intensity, high tenacity, high-compactness aluminum alloy spare part.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.It should be noted that the case where not conflicting
Under, the feature in embodiment and embodiment in the present invention can mutual any combination.
Embodiment 1
The content of high tough thin-walled workpiece cast aluminium alloy gold each component is as follows in terms of weight percentage: Al96.73%,
Si 3.00%, Mg 0.10%, Mn 0.10%, Sr 0.01%, B 0.01%, Ti 0.05%.The height is tough thin-walled workpiece
The preparation method of cast aluminium alloy gold the following steps are included:
1S ingredient: match by said components and take raw material A l-20Si alloy, 99.95% magnesium ingot, 99.8% aluminium ingot, Al-
10Ti alloy, Al-40Mn alloy, Al-10Sr alloy, Al-5Ti-1B alloy, source of iron be 99.95% iron powder or ferro-aluminum among
Alloy；
2S melting and die casting: the resulting raw material of step 1S is added in induction melting furnace, by vacuumizing, logical argon gas,
In 730~760 DEG C of at a temperature of melting, melt solution is obtained；Using mechanical agitation methods, 8~10min is stirred, ingot casting is cast as；
3S homogenization: the ingot casting that step 2S is obtained carries out homogenization heat treatment at 540~560 DEG C, keeps the temperature 3~5h,
Water hardening.
4S solid solution: the alloy that step 3S is obtained is dissolved at 540~560 DEG C, keeps the temperature 1~3h, water quenching；
5S timeliness: the alloy that step 4S is obtained carries out artificial aging at 160~180 DEG C, 2~8h is kept the temperature, after cooling
Obtain high tough aluminium alloy.
Embodiment 2
The content of high tough thin-walled workpiece cast aluminium alloy gold each component is as follows in terms of weight percentage: Al86.98%,
Si 10.00%, Mg 1.00%, Mn 1.00%, Sr 0.10%, B 0.12%, Ti 0.20%, Fe 0.60%.This is high-strength
The preparation method of tough thin-walled workpiece cast aluminium alloy gold the following steps are included:
1S ingredient: match by said components and take raw material A l-20Si alloy, 99.95% magnesium ingot, 99.8% aluminium ingot, Al-
10Ti alloy, Al-40Mn alloy, Al-10Sr alloy, Al-5Ti-1B alloy, source of iron be 99.95% iron powder or ferro-aluminum among
Alloy；
2S melting and die casting: the resulting raw material of step 1S is added in induction melting furnace, by vacuumizing, logical argon gas,
In 730~760 DEG C of at a temperature of melting, melt solution is obtained；Using electromagnetic agitation method, 8~10min is stirred, ingot casting is cast as；
3S homogenization: the ingot casting that step 2S is obtained carries out homogenization heat treatment at 540~560 DEG C, keeps the temperature 3~5h,
Water hardening.
4S solid solution: the alloy that step 3S is obtained is dissolved at 540~560 DEG C, keeps the temperature 1~3h, water quenching；
5S timeliness: the alloy that step 4S is obtained carries out artificial aging at 160~180 DEG C, 2~8h is kept the temperature, after cooling
Obtain high tough aluminium alloy.
Embodiment 3
The content of high tough thin-walled workpiece cast aluminium alloy gold each component is as follows in terms of weight percentage: Al95.45%,
Si 4.00%, Mg 0.25%, Mn 0.20%, Sr 0.01%, B 0.01%, Ti 0.08%.The height is tough thin-walled workpiece
The preparation method of cast aluminium alloy gold the following steps are included:
1S ingredient: match by said components and take raw material A l-20Si alloy, 99.95% magnesium ingot, 99.8% aluminium ingot, Al-
10Ti alloy, Al-40Mn alloy, Al-10Sr alloy, Al-5Ti-1B alloy, source of iron be 99.95% iron powder or ferro-aluminum among
Alloy；
2S melting and die casting: the resulting raw material of step 1S is added in induction melting furnace, by vacuumizing, logical argon gas,
In 730~760 DEG C of at a temperature of melting, melt solution is obtained；Using ultrasonic vibration method, 8~10min is stirred, ingot casting is cast as；
3S homogenization: the ingot casting that step 2S is obtained carries out homogenization heat treatment at 540~560 DEG C, keeps the temperature 3~5h,
Water hardening.
4S solid solution: the alloy that step 3S is obtained is dissolved at 540~560 DEG C, keeps the temperature 1~3h, water quenching；
5S timeliness: the alloy that step 4S is obtained carries out artificial aging at 160~180 DEG C, 2~8h is kept the temperature, after cooling
Obtain high tough aluminium alloy.
Comparative example
Beneficial effect in order to further illustrate the present invention selects other high tough aluminium alloys to implement 1 as a comparison,
In, the height is tough, and aluminium alloy has the group of following mass percent to be grouped as: Si 8.7%, Mn0.65%, Mg 0.5%, Ce
0.35%, Fe 0.18%, Sr 0.03%, impurity≤0.2%, remaining is aluminium.
Test case
Mechanics Performance Testing: press National Standard of the People's Republic of China GMN/T16865-2013, by above-described embodiment 1~
15 aluminium alloy is processed into standard tensile specimen, and room temperature tensile mechanical property is carried out on DNS500 type electronic tensile test machine
It can, wherein rate of extension is 2 mm/mins.
The mechanical experimental results of the aluminium alloy of embodiment 1~15 and comparative example are as shown in table 1, wherein performance detection
Test has been characterized with the same terms same time:
Table 1
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| Mg | 0.10 | 1.00 | 0.25 | 0.75 | 0.35 | 0.60 | 0.60 | 0.55 |
| Si | 3.00 | 10.00 | 4.00 | 8.00 | 5.00 | 7.00 | 7.00 | 6.00 |
| Mn | 0.10 | 1.00 | 0.20 | 0.80 | 0.30 | 0.60 | 0.60 | 0.40 |
| Fe | 0 | 0.60 | 0 | 0.30 | 0 | 0.20 | 0.20 | 0.15 |
| Sr | 0.01 | 0.10 | 0.01 | 0.08 | 0.01 | 0.05 | 0.02 | 0.03 |
| B | 0.01 | 0.12 | 0.01 | 0.10 | 0.01 | 0.05 | 0.03 | 0.05 |
| Ti | 0.05 | 0.20 | 0.08 | 0.18 | 0.10 | 0.15 | 0.10 | 0.15 |
| Al | 96.73 | 86.98 | 95.45 | 89.79 | 94.23 | 91.35 | 91.45 | 92.67 |
| C1=B/Sr | 1.00 | 1.20 | 1.00 | 1.25 | 1.00 | 1.00 | 1.50 | 1.67 |
| C2=Ti/B | 5.00 | 1.67 | 8.00 | 1.80 | 10.00 | 3.00 | 3.33 | 3.00 |
| Yield strength MPa | 150.16 | 333.86 | 198.23 | 325.23 | 246.73 | 308.32 | 310.25 | 290.37 |
| Tensile strength MPa | 188.32 | 358.43 | 230.15 | 346.74 | 282.35 | 337.47 | 344.12 | 329.46 |
| Elongation percentage % | 14 | 8 | 13 | 10 | 12 | 19 | 16 | 13 |
Continued 1
From above-described embodiment and comparative example it will be seen that the present invention passes through the alloy in optimization aluminium alloy preparation process
The technique of element proportion and die cast can obtain tensile strength greater than 188MPa, yield strength and be greater than 150MPa, elongation
Rate is greater than 8% aluminium alloy.Especially embodiment 5,6,7,11,13 and 15, by advanced optimizing major and trace elements
Ratio achieve better effect.
Pack alloy in the present invention has the advantage that 1) the high tough thin-wall construction of the present invention compared with other aluminium alloys
Part cast aluminium alloy gold is made of elements such as Si, Mg, Mn, on the basis of optimizing Si, Mg, Mn main alloying element, addition Ti, B member
Element refinement α-Al crystal grain, introducing Sr element makes the spheric granules of coarse needle-shaped Si particle fine degenerate fine uniform, simultaneously
Regulated and controled by ingredient, β-AlFesi is inhibited to generate, improve the structural constituent uniformity of aluminium alloy, improves aluminium alloy in press casting procedure
Mobility, intensity and plasticity；2) alloy is not adding expensive rare earth member by the ratio of further control B, Sr and Ti
It is tough that height is realized in the case where plain (such as Sc, Zr etc.), and there is advantage in terms of cost；3) heat based on Xi Er SOLIDIFICATION MODEL
Mechanics Calculation shows that the solid-liquid section in alloy (embodiment 3) process of setting is 70 DEG C, is appropriate for semisolid pressure casting
Production；4) high-performance aluminium alloy of the invention, tensile strength are 188~358MPa, and yield strength is 150~333MPa, elongation
Rate is 8.0~23.0%, is suitable for squeezing die-casting process preparation, be satisfied with needed for the fields such as automobile, electronic apparatus, high-end equipment
High intensity, high tenacity, high-compactness aluminum alloy spare part.
Finally, it should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-
It is exclusive to include, so that the process, method, article or equipment comprising a series of elements not only includes those elements,
It but also including other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.In the absence of more restrictions, the element limited by sentence " including one ... ", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of high tough thin-walled workpiece cast aluminium alloy gold, which is characterized in that the aluminium alloy includes following components, and each group
The content divided is as follows in terms of weight percentage: Al 86.98~96.73%, Si 3.00~10.00%, Mg 0.10~
1.00%, Mn 0.10~1.00%, Sr 0.01~0.10%, B 0.01~0.12%, Ti 0.05-0.20%, Fe≤
0.60%；Also, ratio C 1=B/Sr >=1.00 of weight percent.
2. the tough thin-walled workpiece cast aluminium alloy gold of height according to claim 1, which is characterized in that the aluminium alloy includes
Following components, and the content of each component is as follows in terms of weight percentage: Al 89.79~95.45%, Si 4.00~
8.00%, Mg 0.25~0.75%, Mn 0.20~0.80%, Sr 0.01~0.08%, B 0.01~0.10%, Ti
0.08-0.18%, Fe≤0.30%；Also, ratio C 1=B/Sr >=1.00 of weight percent.
3. the tough thin-walled workpiece cast aluminium alloy gold of height according to claim 1, which is characterized in that the aluminium alloy includes
Following components, and the content of each component is as follows in terms of weight percentage: Al 91.35~94.23%, Si 5.00~
7.00%, Mg 0.35~0.60%, Mn 0.30~0.60%, Sr 0.01~0.05%, B 0.01~0.05%, Ti
0.10-0.15%, Fe≤0.20%；Also, ratio C 1=B/Sr >=1.00 of weight percent.
4. the tough thin-walled workpiece cast aluminium alloy gold of height according to claim 1, which is characterized in that the ratio of weight percent
The range of value C1=B/Sr is 1.00~1.50.
5. the tough thin-walled workpiece cast aluminium alloy gold of height according to claim 1, which is characterized in that the ratio of weight percent
The range of value C2=Ti/B is 2.40~7.50.
6. the tough thin-walled workpiece cast aluminium alloy gold of height according to claim 5, which is characterized in that the ratio of weight percent
The range of value C2=Ti/B is 3.00~5.00.
7. a kind of preparation method of the tough thin-walled workpiece cast aluminium alloy gold of height as described in claim 1~6 is any, feature
It is, the preparation method comprises the following steps:
1S ingredient: raw material silicon source, magnesium source, silicon source, titanium source, manganese source, boron source, barium source, source of iron are taken by a group distribution, it is former to prepare aluminium alloy
Material；
2S melting and die casting: the raw material that step 1S is prepared heats melting, obtains melt melt；The melt solution is stirred
It mixes, and is cast as ingot casting；
3S homogenization: the ingot casting that step 2S is obtained carries out homogenization heat treatment at 540~560 DEG C, keeps the temperature 3-5h, and water cooling is quenched
Fire.
4S solid solution: the alloy that step 3S is obtained is dissolved at 540~560 DEG C, keeps the temperature 1~3h, water quenching；
5S timeliness: the alloy that step 4S is obtained carries out artificial aging at 160~180 DEG C, keeps the temperature 2~8h, obtains after cooling high
Tough aluminium alloy.
8. the preparation method of the tough thin-walled workpiece cast aluminium alloy gold of height according to claim 7, which is characterized in that in step
In rapid 1S, the silicon source is Al-20Si alloy, the magnesium ingot that the magnesium source is 99.95%, the aluminium ingot that source of aluminium is 99.8%,
The titanium source is Al-10Ti alloy, and the manganese source is Al-40Mn alloy, and the barium source is Al-10Sr alloy, and the boron source is
Al-5Ti-1B alloy, the iron powder or ferro-aluminum intermediate alloy that the source of iron is 99.95%.
9. the preparation method of the tough thin-walled workpiece cast aluminium alloy gold of height according to claim 7, which is characterized in that in step
In rapid 2S, smelting temperature is 730~760 DEG C；The stirring means include mechanical stirring, electromagnetic agitation or ultrasonic vibration method.
10. a kind of tough thin-walled workpiece cast aluminium alloy gold of height any according to claim 1~6 is raw in semisolid pressure casting
Application in production.
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| CN201910438346.2A CN110129630B (en) | 2019-05-24 | 2019-05-24 | High-toughness thin-wall structural member cast aluminum alloy and preparation method thereof |
| PCT/CN2019/100504 WO2020237837A1 (en) | 2019-05-24 | 2019-08-14 | Cast aluminum alloy of high-strength high-toughness thin-wall structural member and preparation method therefor |
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| US11591674B2 (en) | 2019-10-09 | 2023-02-28 | Uacj Corporation | Aluminum-alloy sheet |
| CN112626383A (en) * | 2019-10-09 | 2021-04-09 | 株式会社Uacj | Aluminum alloy plate |
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| WO2020237837A1 (en) | 2020-12-03 |
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