CN107868889A - Aluminium alloy and its preparation method and application and automobile body skeleton connector and electric automobile - Google Patents
Aluminium alloy and its preparation method and application and automobile body skeleton connector and electric automobile Download PDFInfo
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- CN107868889A CN107868889A CN201610848629.0A CN201610848629A CN107868889A CN 107868889 A CN107868889 A CN 107868889A CN 201610848629 A CN201610848629 A CN 201610848629A CN 107868889 A CN107868889 A CN 107868889A
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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
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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
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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
Abstract
This disclosure relates to a kind of aluminium alloy and its preparation method and application and automobile body skeleton connector and electric automobile, the aluminium alloy contain alloying element and the aluminium element of surplus；On the basis of the gross weight of the aluminium alloy, the alloying element includes：67 weight % Si, 0.4 0.6 weight % Mg, 0.2 0.4 weight % Cu, no more than 0.12 weight % Fe, no more than 0.05 weight % Mn, the Ti no more than 0.2 weight % and the Zn no more than 0.05 weight %.The automobile body skeleton connector made by aluminium alloy provided using the disclosure can meet the structural strength of automobile body, the automobile body connected mode of traditional welding can be substituted, the Joining Technology of riveting is realized, performance is more preferable compared with the casting made by common casting die and cost is suitable.
Description
Technical field
This disclosure relates to a kind of aluminium alloy and its preparation method and application and automobile body skeleton connector and electronic vapour
Car.
Background technology
The skeleton of current Electric Bus is steel skeleton, and steel construction make it that carriage tare weight is big, and then causes carrying
Amount ten people at least more a small number of than regular fuel city bus.In addition, steel skeleton easily gets rusty, even across steel skeleton after phosphorating treatment
Life-span also only has 8 years or so, and can not recycle, and parkerized process can also pollute to environment.With environmental protection
With the needs of energy-conservation, the lightweight of automobile has become the light weight of the trend of world car development, automobile skeleton and automobile casting
Change also as one of important development direction of automobile.The use of the light alloy materials such as magnalium is that the main of current each automaker subtracts
Measure again.
, will if being unable to reach higher mechanical property during using skeleton of the aluminium alloy element as Electric Bus
Ask, then can influence the structural strength of whole vehicle body.In existing casting method, casting die can produce volume gas, shrinkage cavity and cold shut
Etc. casting flaw so that the mechanical property of automobile casting does not reach requirement；Gravitation casting method is in sample size precision and power
Product requirement can not be met by learning aspect of performance, obvious to increase although can reach product size requirement by subsequently machining
Cost is added；Forging method is difficult to be molded into the automobile casting product with specific structure, and shaping cost is very high.
The content of the invention
One purpose of the disclosure is to provide a kind of aluminium alloy and its preparation method and application, to overcome conventional aluminum alloy force
The defects of learning poor-performing.
Another object of the present disclosure is to provide a kind of automobile body skeleton connector, and the automobile body skeleton connector is adopted
The aluminium alloy provided with the disclosure is made, and there is higher mechanical property to reduce cost simultaneously.
A further object of the present disclosure is to provide a kind of electric automobile, and the electric automobile uses the vehicle car that the disclosure provides
Body skeleton connector.
To achieve these goals, disclosure first aspect：A kind of aluminium alloy is provided, the aluminium alloy contain alloying element and
The aluminium element of surplus；On the basis of the gross weight of the aluminium alloy, the alloying element includes：6-7 weight % Si, 0.4-
0.6 weight % Mg, 0.2-0.4 weight % Cu, no more than 0.12 weight % Fe, no more than 0.05 weight % Mn, no
Ti more than the 0.2 weight % and Zn no more than 0.05 weight %.
Preferably, on the basis of the gross weight of the aluminium alloy, the alloying element includes：6-6.5 weight % Si,
0.5-0.6 weight % Mg, 0.2-0.4 weight % Cu, no more than 0.12 weight % Fe, no more than 0.05 weight %'s
Mn, the Ti no more than 0.2 weight % and the Zn no more than 0.05 weight %.
Preferably, the fracture strength of the aluminium alloy is not less than 300MPa, and yield strength is not less than 265MPa, and elongation percentage is not
Less than 10%.
Preferably, the fracture strength of the aluminium alloy is not less than 330MPa, and yield strength is not less than 270MPa, and elongation percentage is not
Less than 11%.
Disclosure second aspect：A kind of method for preparing aluminium alloy is provided, this method comprises the following steps：A, it is melting is former
Material melting, the material after being melted；The melting raw material contains alloying element and the aluminium element of surplus；In the melting raw material
Gross weight for 100 parts by weight benchmark on, the alloying element contains the Si of 6-7 parts by weight, the Mg of 0.4-0.6 parts by weight,
The Cu of 0.2-0.4 parts by weight, no more than the Fe of 0.12 parts by weight, no more than the Mn of 0.05 parts by weight, no more than 0.2 parts by weight
The Ti and Zn no more than 0.05 parts by weight；B, the material after the melting that will be obtained in step a carries out ultrasonic activation processing
With mechanical agitation processing, the material after being stirred；C, the material after the stirring that will be obtained in step b is carried out at die casting
Reason.
Preferably, the condition of the melt process in step a includes：Temperature is 700-730 DEG C, and the time is that 6-10 is small
When.
Preferably, the condition of the ultrasonic activation processing in step b includes：Ultrasonic frequency is 20KHz-
120KHz, time are 0.1-5 minutes, and temperature is 680-700 DEG C, and ultrasonic activation amplitude is 0.1-2mm；At the mechanical agitation
The condition of reason includes：Mechanical agitation rotating speed is 100-3000r/min, and the mechanical agitation time is the 5-120 seconds.
Preferably, the die casting processing in step c includes squeezing the material after the stirring using bob-weight diecasting method
It is pressed onto in mould, the condition of the die casting processing includes：Die casting machine tonnage is not less than 400 tons, and die casting pressure is 50-200MPa,
Injection speed is 0.1-0.5m/s.
Preferably, this method also includes, after the material after the stirring that will be obtained in step b carries out die casting processing, then
Machining is carried out, then carries out at least one of solution treatment, natural aging treatment and artificial aging processing.
Preferably, after the material after the stirring that will be obtained in step b carries out die casting processing, then machining is carried out,
Then solution treatment, natural aging treatment and artificial aging processing are carried out.
Preferably, the condition of the solution treatment includes：Temperature is 520-530 DEG C, and the time is 8-10 hours；The nature
The condition of Ageing Treatment includes：Temperature is room temperature, and the time is 6-10 hours；The condition of the artificial aging processing includes：Temperature
For 150-180 DEG C, the time is 10-12 hours.
The disclosure third aspect：A kind of aluminium alloy is provided, the aluminium alloy is prepared by the method for disclosure second aspect.
Disclosure fourth aspect：The aluminium alloy for providing disclosure first aspect or the third aspect connects in automobile body skeleton
Application in part.
The aspect of the disclosure the 5th：A kind of automobile body skeleton connector is provided, the automobile body skeleton connector is using this
The aluminium alloy of open first aspect or the third aspect is made.
Preferably, this body frame connector includes the first connecting plate and integration is connected to first connecting plate
Second connecting plate at edge；Also, in the also integration connection respectively of the both sides of first connecting plate and second connecting plate
There is the first reinforcement side plate and second to strengthen side plate.
Preferably, it is further opened with least one rivet hole on first connecting plate and/or second connecting plate.
The aspect of the disclosure the 6th：A kind of electric automobile is provided, the electric automobile includes the vehicle car of the aspect of the disclosure the 5th
Body skeleton connector.
Traditional aluminium alloy formula is improved to improve its mechanical property, adopted by Pass through above-mentioned technical proposal, the disclosure
The automobile body skeleton connector made by aluminium alloy provided with the disclosure can meet the structural strength of automobile body, can be with
Substitute the automobile body connected mode of traditional welding, realize the Joining Technology of riveting, with the casting made by common casting die
And cost more preferable compared to performance is suitable.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool
Body embodiment is used to explain the disclosure together, but does not form the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is the stereogram for the automobile body skeleton connector that the disclosure is provided；
Fig. 2 is the metallograph of the aluminium alloy of embodiment 1；
Fig. 3 is the metallograph of the aluminium alloy of comparative example 1.
Description of reference numerals
The connecting plate 3 first of 1 first connecting plate 2 second strengthens side plate
4 second strengthen the rivet hole of side plate 5
Embodiment
The embodiment of the disclosure is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explained the disclosure, is not limited to the disclosure.
Disclosure first aspect：A kind of aluminium alloy is provided, the aluminium alloy contains alloying element and the aluminium element of surplus；With institute
On the basis of the gross weight for stating aluminium alloy, the alloying element includes：6-7 weight % Si, 0.4-0.6 weight % Mg, 0.2-
0.4 weight % Cu, no more than 0.12 weight % Fe, no more than 0.05 weight % Mn, Ti no more than 0.2 weight % and
No more than 0.05 weight % Zn.The aluminium alloy obtained under the formula has more preferable mechanical property and casting character, and it is disconnected
Resistance to spalling can reach not less than 300MPa, and yield strength, which can reach, can reach and be not less than not less than 265MPa, elongation percentage
10%.
According to the disclosure in a first aspect, in the preferred case, in order to further improve the mechanical property of the aluminium alloy
And casting character, on the basis of the gross weight of the aluminium alloy, the alloying element includes：6-6.5 weight % Si, 0.5-
0.6 weight % Mg, 0.2-0.4 weight % Cu, no more than 0.12 weight % Fe, no more than 0.05 weight % Mn, no
Ti more than the 0.2 weight % and Zn no more than 0.05 weight %.Under the optimization formula, the fracture strength of aluminium alloy can reach
To not less than 330MPa, yield strength can reach can reach not less than 11% not less than 270MPa, elongation percentage.
Herein, in the case of without opposite explanation, the numerical value of the yield strength of aluminium alloy, fracture strength and elongation percentage is
Refer to reference《GB/T 228.1-2010 metal material stretching test part 1s：Room temperature test method》The surrender of the aluminium alloy of test
The numerical value of intensity, fracture strength and elongation percentage.
Disclosure second aspect：A kind of method for preparing aluminium alloy is provided, this method comprises the following steps：A, it is melting is former
Material melting, the material after being melted；The melting raw material contains alloying element and the aluminium element of surplus；In the melting raw material
Gross weight for 100 parts by weight benchmark on, the alloying element contains the Si of 6-7 parts by weight, the Mg of 0.4-0.6 parts by weight,
The Cu of 0.2-0.4 parts by weight, no more than the Fe of 0.12 parts by weight, no more than the Mn of 0.05 parts by weight, no more than 0.2 parts by weight
The Ti and Zn no more than 0.05 parts by weight：B, the material after the melting that will be obtained in step a carries out ultrasonic activation processing
With mechanical agitation processing, the material after being stirred；C, the material after the stirring that will be obtained in step b is carried out at die casting
Reason.
According to the second aspect of the disclosure, the condition of the melt process in step a melts for the conventional alloy in this area
Melt condition, for example, the condition of the melt process in step a can include：Temperature is 700-730 DEG C, and the time is that 6-10 is small
When.
According to the second aspect of the disclosure, the material after the melting that will be obtained in step a, which is fitted into container, to be surpassed
Acoustic vibration processing and mechanical agitation processing, the material after resulting stirring is tiny semisolid grain structure, Ke Yijin
One step improves the intensity and plasticity of material, and the container can be crucible.Ultrasonic activation processing in step b can wrap
Include and be placed in ultrasonic vibration apparatus in the container of the material after holding the melting, open ultrasonic vibration apparatus, setting is shaken
The processing is carried out after dynamic parameter.The ultrasonic vibration apparatus can include ultrasonic transducer and elongate probe, described elongated
Probe upper end is connected with ultrasonic transducer, and the elongate probe bottom, which is completely or partially introduced into, described holds described melt
In the container of material after melting.The condition of the ultrasonic activation processing can include：Ultrasonic frequency is 20KHz-120KHz,
Time is 0.1-5 minutes, and temperature is 680-700 DEG C, and ultrasonic activation amplitude is 0.1-2mm.The bar of the mechanical agitation processing
Part can include：Mechanical agitation rotating speed is 100-3000r/min, and the mechanical agitation time is the 5-120 seconds.
According to the second aspect of the disclosure, in order to reduce the casting flaws such as shrinkage cavity, stomata and pin hole, further improve aluminium and close
The mechanical property of gold, the die casting processing in step c can be included the material after the stirring using bob-weight diecasting method
It is expressed in mould.The bob-weight diecasting method refers to make the driving force and gravity direction of the material filling mould after the stirring
On the contrary, by overcoming the effect of the self gravitation of the material after the stirring, mould internal resistance and other external force to complete filling
Casting mold, used equipment can be that this area is conventional, such as can use described in formula extrusion casting machine progress from bottom to top
Die casting is handled.The condition of the die casting processing can include：Die casting machine tonnage is not less than 400 tons, and die casting pressure is 50-
200MPa, injection speed 0.1-0.5m/s.
According to the second aspect of the disclosure, in order that the performance of alloy product is more stable, this method also includes, and will walk
After material after the stirring obtained in rapid b carries out die casting processing, then machining is carried out, removes the flaws such as the mouth of a river, cinder ladle,
Then at least one of solution treatment, natural aging treatment and artificial aging processing are carried out.Under preferable case, by step b
After material after the obtained stirring carries out die casting processing, then machining is carried out, after removing the flaws such as the mouth of a river, cinder ladle, according to
Secondary progress solution treatment, natural aging treatment and artificial aging processing, can cause mechanical property and the casting of the aluminium alloy
Performance further improves.Wherein, the implication of the solution treatment, natural aging treatment and artificial aging processing is art technology
Known to personnel.The condition of the solution treatment can include：Temperature is 520-530 DEG C, and the time is 8-10 hours；The nature
The condition of Ageing Treatment includes：Temperature is room temperature, and the time is 6-10 hours；The condition of the artificial aging processing includes：Temperature
For 150-180 DEG C, the time is 10-12 hours.
The method of what disclosure second aspect was provided prepare aluminium alloy passes through to be improved to the formula of aluminium alloy, improves tradition
The Technology for Heating Processing that semi-solid forming technique and exploitation match, molding structure can not be prepared by solving traditional preparation methods
The problem of complicated, high mechanical properties aluminium alloy castingses, while reduce preparation cost.
The disclosure third aspect：A kind of aluminium alloy is provided, the aluminium alloy is prepared by the method for disclosure second aspect.
Disclosure fourth aspect：The aluminium alloy for providing disclosure first aspect or the third aspect connects in automobile body skeleton
Application in part.
The aspect of the disclosure the 5th：A kind of automobile body skeleton connector is provided, the automobile body skeleton connector is using this
The aluminium alloy of open first aspect or the third aspect is made.
According to the 5th of the disclosure the aspect, as shown in figure 1, this body frame connector includes the first connecting plate 1 and one
Body is connected to second connecting plate 2 at the edge of first connecting plate 1, the angle between the first connecting plate 1 and the second connecting plate 2
Degree can need to be designed according to the actual connection of automobile body.In first connecting plate 1 and second connecting plate 2
Also integration is connected with the first reinforcement side plate 3 and the second reinforcement side plate 4 respectively for both sides, and first, which strengthens side plate 3 and second, strengthens side
Plate 4 is vertical with the first connecting plate 1 and the place plane of the second connecting plate 2 respectively independently of one another, and first, which strengthens side plate 3 and second, adds
The shape of strong side plate 4 can need to be designed according to the actual connection of automobile body.
According to the 5th of the disclosure the aspect, as shown in figure 1, in first connecting plate 1 and/or second connecting plate 2
On be further opened with least one rivet hole 5, rivet is realized to during use the riveting of automobile body through rivet hole.
The automobile body skeleton connector that the aspect of the disclosure the 5th provides can meet the structural strength of automobile body, can be with
Substitute the automobile body connected mode of traditional welding, realize the Joining Technology of riveting, with the casting made by common casting die
And cost more preferable compared to performance is suitable.
The aspect of the disclosure the 6th：A kind of electric automobile is provided, the electric automobile includes the vehicle car of the aspect of the disclosure the 5th
Body skeleton connector.
The present invention will be further illustrated by embodiment below, but the present invention is not therefore subject to any restriction.
In embodiment and comparative example, reference《GB/T 228.1-2010 metal material stretching test part 1s：Room temperature is tested
Method》Test yield strength, fracture strength and the elongation percentage of aluminium alloy, reference《GB/T 13298-1991 metal microstructures are examined
Proved recipe method》Carry out the metallographic structure observation of aluminium alloy.
Embodiment 1
By the Si of 6.3 parts by weight, the Mg of 0.55 parts by weight, the Cu of 0.25 parts by weight, the Fe of 0.1 parts by weight, 0.02 weight
Part Mn, the Ti of 0.15 parts by weight, the Zn of 0.03 parts by weight and complement to the Al of 100 parts by weight and melt 8 at a temperature of 710 DEG C
Hour；Material after melting is placed in crucible, carries out ultrasonic activation processing and mechanical agitation processing, ultrasonic frequency is
30KHz, ultrasonic activation time are 9 seconds, and temperature is 690 DEG C, and ultrasonic activation amplitude is 0.15mm, and mechanical agitation rotating speed is
1000r/min, mechanical agitation time are 9 seconds；Material after stirring is poured into barrel, using formula extrusion casting machine from bottom to top
(tonnage is 650 tons) is expressed in mould, pressure 60MPa, injection speed 0.2m/s；Sample is removed after die casting processing
The mouth of a river, cinder ladle, solution treatment 9 hours is carried out at a temperature of 525 DEG C, then carry out natural aging treatment at room temperature 8 hours,
Artificial aging is carried out at a temperature of 170 DEG C to handle 10 hours, obtains automobile body skeleton connector made of aluminium alloy.It is detected to bend
Intensity, fracture strength and elongation percentage are taken, test result is shown in Table 1.Metallograph is shown in Fig. 1.
Embodiment 2
By the Si of 6.1 parts by weight, the Mg of 0.51 parts by weight, the Cu of 0.3 parts by weight, the Fe of 0.07 parts by weight, 0.03 weight
Part Mn, the Ti of 0.1 parts by weight, the Zn of 0.04 parts by weight and complement to the Al of 100 parts by weight and melt 8h at a temperature of 710 DEG C
Time；Material after melting is placed in crucible, carries out ultrasonic activation processing and mechanical agitation processing, ultrasonic frequency is
60KHz, ultrasonic activation time are 1 minute, and temperature is 690 DEG C, and ultrasonic activation amplitude is 0.1mm, and mechanical agitation rotating speed is
200r/min, mechanical agitation time are 60 seconds；Material after stirring is poured into barrel, using formula extrusion casting machine from bottom to top
(tonnage is 450 tons) is expressed in mould, pressure 100MPa, injection speed 0.4m/s；Sample is removed after die casting processing
The product mouth of a river, cinder ladle, the solution treatment 9h times are carried out at a temperature of 520 DEG C, when then carrying out natural aging treatment 8h at room temperature
Between, the artificial aging processing 10h times are carried out at a temperature of 160 DEG C, obtain automobile body skeleton connector made of aluminium alloy.Inspection
Its yield strength, fracture strength and elongation percentage are surveyed, test result is shown in Table 1.Metallograph is similar with Fig. 1.
Embodiment 3
By the Si of 6.4 parts by weight, the Mg of 0.59 parts by weight, the Cu of 0.38 parts by weight, the Fe of 0.08 parts by weight, 0.02 weight
Part Mn, the Ti of 0.12 parts by weight, the Zn of 0.03 parts by weight and complement to the Al of 100 parts by weight and melted at a temperature of 710 DEG C
The 8h times；Material after melting is placed in crucible, carries out ultrasonic activation processing and mechanical agitation processing, ultrasonic frequency is
100KHZ, ultrasonic activation time are 9s, and temperature is 690 DEG C, and ultrasonic activation amplitude is 0.2mm, and mechanical agitation rotating speed is
2000r/min, mechanical agitation time are 90 seconds；Material after stirring is poured into barrel, using formula extrusion casting machine from bottom to top
(tonnage is 850 tons) is expressed in mould, pressure 150MPa, injection speed 0.1m/s；Sample is removed after die casting processing
The product mouth of a river, cinder ladle, the solution treatment 9h times are carried out at a temperature of 530 DEG C, when then carrying out natural aging treatment 8h at room temperature
Between, the artificial aging processing 10h times are carried out at a temperature of 180 DEG C, obtain automobile body skeleton connector made of aluminium alloy.Inspection
Its yield strength, fracture strength and elongation percentage are surveyed, test result is shown in Table 1.Metallograph is similar with Fig. 1.
Embodiment 4
By the Si of 6.7 parts by weight, the Mg of 0.45 parts by weight, the Cu of 0.3 parts by weight, the Fe of 0.1 parts by weight, 0.04 parts by weight
Mn, the Ti of 0.15 parts by weight, the Zn of 0.03 parts by weight and complement to the Al of 100 parts by weight and melt 8h at a temperature of 710 DEG C
Time；Material after melting is placed in crucible, carries out ultrasonic activation processing and mechanical agitation processing, ultrasonic frequency is
30KHz, ultrasonic activation time are 9s, and temperature is 690 DEG C, and ultrasonic activation amplitude is 0.15mm, and mechanical agitation rotating speed is
1000r/min, mechanical agitation time are 9 seconds；Material after stirring is poured into barrel, using formula extrusion casting machine from bottom to top
(tonnage is 650 tons) is expressed in mould, pressure 60MPa, injection speed 0.2m/s；Sample is removed after die casting processing
The mouth of a river, cinder ladle, the solution treatment 9h times are carried out at a temperature of 525 DEG C, then carry out the natural aging treatment 8h times at room temperature,
The artificial aging processing 10h times are carried out at a temperature of 170 DEG C, obtain automobile body skeleton connector made of aluminium alloy.Detection
Its yield strength, fracture strength and elongation percentage, test result are shown in Table 1.Metallograph is similar with Fig. 1.
Embodiment 5
By the Si of 6.9 parts by weight, the Mg of 0.41 parts by weight, the Cu of 0.25 parts by weight, the Fe of 0.1 parts by weight, 0.02 weight
Part Mn, the Ti of 0.15 parts by weight, the Zn of 0.03 parts by weight and complement to the Al of 100 parts by weight and melted at a temperature of 710 DEG C
The 8h times；Material after melting is placed in crucible, carries out ultrasonic activation processing and mechanical agitation processing, ultrasonic frequency is
30KHz, ultrasonic activation time are 9s, and temperature is 690 DEG C, and ultrasonic activation amplitude is 0.15mm, and mechanical agitation rotating speed is
1000r/min, mechanical agitation time are 9 seconds；Material after stirring is poured into barrel, using formula extrusion casting machine from bottom to top
(tonnage is 650 tons) is expressed in mould, pressure 60MPa, injection speed 0.2m/s；Sample is removed after die casting processing
The mouth of a river, cinder ladle, the solution treatment 9h times are carried out at a temperature of 525 DEG C, then carry out the natural aging treatment 8h times at room temperature,
The artificial aging processing 10h times are carried out at a temperature of 170 DEG C, obtain automobile body skeleton connector made of aluminium alloy.Detection
Its yield strength, fracture strength and elongation percentage, test result are shown in Table 1.Metallograph is similar with Fig. 1.
Comparative example 1
Difference with embodiment 1 is that the formula of aluminium alloy is：The Si of 7.2 parts by weight, the Mg of 0.38 parts by weight, 0.08
The Cu of parts by weight, the Fe of 0.11 parts by weight, the Mn of 0.02 parts by weight, the Ti of 0.18 parts by weight, the Zn and benefit of 0.02 parts by weight
The sufficient Al to 100 parts by weight.Its yield strength, fracture strength and elongation percentage are detected, test result is shown in Table 1.Metallograph is shown in figure
2。
Comparative example 2
Difference with embodiment 1 is to handle without ultrasonic activation.Detect its yield strength, fracture strength and extension
Rate, test result are shown in Table 1.Metallograph is similar with Fig. 2.
Comparative example 3
Difference with embodiment 1 is to handle without mechanical agitation.Detect its yield strength, fracture strength and extension
Rate, test result are shown in Table 1.Metallograph is similar with Fig. 2.
Comparative example 4
Difference with embodiment 1, which is to be heat-treated, uses traditional T6 processing procedures, is to be dissolved 6h at 535 DEG C, then exists
4h is dissolved at 140 DEG C.Its yield strength, fracture strength and elongation percentage are detected, test result is shown in Table 1.Metallograph and Fig. 2 classes
Seemingly.
Comparative example 5
Difference with embodiment 1 is die casting processing using horizontal die casting machine (being purchased from mechanical stiffness model 280T die casting machines), pressure
Power is 60MPa, injection speed 0.2m/s.Its yield strength, fracture strength and elongation percentage are detected, test result is shown in Table 1.Metallographic
Photo is similar with Fig. 2.
Table 1
| Embodiment | Yield strength (MPa) | Fracture strength (MPa) | Elongation percentage (%) |
| Embodiment 1 | 284 | 343 | 12.5 |
| Embodiment 2 | 278 | 332 | 11 |
| Embodiment 3 | 287 | 341 | 11.5 |
| Embodiment 4 | 270 | 327 | 10.5 |
| Embodiment 5 | 268 | 315 | 10 |
| Comparative example 1 | 239 | 288 | 8 |
| Comparative example 2 | 240 | 266 | 9 |
| Comparative example 3 | 250 | 295 | 8.5 |
| Comparative example 4 | 248 | 280 | 7.5 |
| Comparative example 5 | 240 | 276 | 6 |
The aluminium alloy that can be seen that the disclosure from embodiment 1-5 and comparative example 1-5 result has good mechanical property
Can, fracture strength can reach more than 300MPa, and yield strength can reach more than 265MPa, and elongation percentage is especially closing more than 10%
Gold element is 6-6.5 weight % Si, 0.5-0.6 weight % Mg, 0.2-0.4 weight % Cu, no more than 0.12 weight %
Fe, no more than 0.05 weight % Mn, the Ti no more than 0.2 weight % and the aluminium alloy no more than 0.05 weight % Zn are matched somebody with somebody
Than under, fracture strength can be reached and be not less than 330MPa, yield strength is not less than 270MPa, and elongation percentage is not less than 11%.From gold
Phase photo, which can be seen that the aluminium alloy prepared using disclosed method, can obtain the structure of spherical or subsphaeroidal non-dendrite arm
(Fig. 2), and use the irregular structure (Fig. 3) of the aluminium alloy of conventional method preparation, it was demonstrated that prepared using disclosed method
Aluminium alloy has higher combination property.
The preferred embodiment of the disclosure is described in detail above in association with accompanying drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical scheme of the disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, it can also be combined between a variety of embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought, it should equally be considered as disclosure disclosure of that.
Claims (17)
1. a kind of aluminium alloy, it is characterised in that the aluminium alloy contains alloying element and the aluminium element of surplus；With the aluminium alloy
On the basis of gross weight, the alloying element includes：6-7 weight % Si, 0.4-0.6 weight % Mg, 0.2-0.4 weight %'s
Cu, no more than 0.12 weight % Fe, no more than 0.05 weight % Mn, no more than 0.2 weight % Ti and no more than 0.05
Weight % Zn.
2. aluminium alloy according to claim 1, wherein, on the basis of the gross weight of the aluminium alloy, the alloying element
Including：6-6.5 weight % Si, 0.5-0.6 weight % Mg, 0.2-0.4 weight % Cu, no more than 0.12 weight %'s
Fe, no more than 0.05 weight % Mn, the Ti no more than 0.2 weight % and the Zn no more than 0.05 weight %.
3. aluminium alloy according to claim 1 or 2, wherein, the fracture strength of the aluminium alloy is not less than 300MPa, surrender
Intensity is not less than 265MPa, and elongation percentage is not less than 10%.
4. aluminium alloy according to claim 3, wherein, the fracture strength of the aluminium alloy is not less than 330MPa, and surrender is strong
Degree is not less than 270MPa, and elongation percentage is not less than 11%.
A kind of 5. method for preparing aluminium alloy, it is characterised in that this method comprises the following steps：
A, by melting raw materials melt, the material after being melted；The melting raw material contains alloying element and the aluminium element of surplus；
It is that the alloying element contains the Si of 6-7 parts by weight, 0.4- on the benchmark of 100 parts by weight in the gross weight of the melting raw material
The Cu of the Mg of 0.6 parts by weight, 0.2-0.4 parts by weight, no more than the Fe of 0.12 parts by weight, no more than the Mn of 0.05 parts by weight, no
More than the Ti and the Zn no more than 0.05 parts by weight of 0.2 parts by weight；
B, the material after the melting that will be obtained in step a carries out ultrasonic activation processing and mechanical agitation processing, is stirred
Material after mixing；
C, the material after the stirring that will be obtained in step b carries out die casting processing.
6. according to the method for claim 5, wherein, the condition of the melt process in step a includes：Temperature is 700-
730 DEG C, the time is 6-10 hours.
7. according to the method for claim 5, wherein, the condition of the ultrasonic activation processing in step b includes：Ultrasound
Wave frequency rate is 20KHz-120KHz, and the time is 0.1-5 minutes, and temperature is 680-700 DEG C, and ultrasonic activation amplitude is 0.1-2mm；
The condition of the mechanical agitation processing includes：Mechanical agitation rotating speed is 100-3000r/min, and the mechanical agitation time is the 5-120 seconds.
8. according to the method for claim 5, wherein, the die casting processing in step c includes using bob-weight diecasting method
Material after the stirring is expressed in mould, the condition of the die casting processing includes：Die casting machine tonnage is not less than 400 tons,
Die casting pressure is 50-200MPa, injection speed 0.1-0.5m/s.
9. according to the method described in any one in claim 5-8, this method also includes, will be obtained in step b described in stir
After material after mixing carries out die casting processing, then carry out machining, then carry out solution treatment, natural aging treatment and it is artificial when
At least one of effect processing.
10. according to the method for claim 9, wherein, the material after the stirring that will be obtained in step b is carried out at die casting
After reason, then machining is carried out, then carry out solution treatment, natural aging treatment and artificial aging processing.
11. according to the method for claim 9, wherein, the condition of the solution treatment includes：Temperature is 520-530 DEG C, when
Between be 8-10 hours；The condition of the natural aging treatment includes：Temperature is room temperature, and the time is 6-10 hours；When described artificial
The condition of effect processing includes：Temperature is 150-180 DEG C, and the time is 10-12 hours.
12. a kind of aluminium alloy, it is characterised in that the aluminium alloy is prepared into as the method described in any one in claim 5-10
Arrive.
13. application of the aluminium alloy in automobile body skeleton connector is prepared in claim 1-4 and 12 described in any one.
14. a kind of automobile body skeleton connector, it is characterised in that the automobile body skeleton connector uses claim 1-4
With 12 in aluminium alloy described in any one be made.
15. automobile body skeleton connector according to claim 14, wherein, this body frame connector includes first
Connecting plate (1) and integration are connected to second connecting plate (2) at the edge of first connecting plate (1)；Also, described first
Also integration is connected with the first reinforcement side plate (3) and the second reinforcement respectively for the both sides of connecting plate (1) and second connecting plate (2)
Side plate (4).
16. automobile body skeleton connector according to claim 15, wherein, in first connecting plate (1) and/or institute
State and at least one rivet hole (5) is further opened with the second connecting plate (2).
17. a kind of electric automobile, it is characterised in that the electric automobile includes the car described in any one in claim 14-16
Body frame connector.
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| CN112795820A (en) * | 2019-10-28 | 2021-05-14 | 晟通科技集团有限公司 | Aluminum alloy template die-casting material for buildings |
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