CN106244958B - A kind of heat treatment process of electroconductive aluminium strip - Google Patents
A kind of heat treatment process of electroconductive aluminium strip Download PDFInfo
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- CN106244958B CN106244958B CN201610818077.9A CN201610818077A CN106244958B CN 106244958 B CN106244958 B CN 106244958B CN 201610818077 A CN201610818077 A CN 201610818077A CN 106244958 B CN106244958 B CN 106244958B
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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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- 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
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
Abstract
The present invention relates to field of aluminum alloy heat treatment technology, and in particular to a kind of heat treatment process of electroconductive aluminium strip includes the following steps：It is required according to the weight percent of aluminium alloy stock ingredient, aluminium bar is made in melted aluminium alloy stock；Aluminium bar is removed into epidermis, heating carries out Homogenization Treatments, is subsequently cooled to room temperature；Then aluminium bar is subjected to the pre-heat treatment, while extrusion cylinder and extrusion die are carried out the pre-heat treatment, then extrusion die is taken out, be assembled in extruder, take out aluminium bar, the extrusion cylinder for being filled to extrusion die carries out extrusion forming, obtains aluminium row；The exit that aluminium is come to extrusion cylinder carries out online water spray quenching processing；Aluminium after quenching treatment is come and carries out natural aging treatment at room temperature, then carries out dual ageing treatment, is subsequently cooled to room temperature, electroconductive aluminium strip is made.The heat treatment process of the present invention makes electroconductive aluminium strip reach required elongation percentage, conductivity and mechanical performance by using quenching treatment, natural aging treatment and dual ageing treatment.
Description
Technical field
The present invention relates to field of aluminum alloy heat treatment technology, and in particular to a kind of heat treatment process of electroconductive aluminium strip.
Background technology
With the rapid development of China's power industry, to transmission facility (such as high and low voltage switchgear, high-and-low-voltage bus way)
Use demand also increasingly increases, and the manufacture of transmission facility needs the copper of a large amount of consumption high conductivity, but the copper resource phase in China
To scarcity, dependent on import, causing copper valency, price rises steadily the copper material of 40%-50% in recent years, increases enterprise's manufacture
Cost.To reduce cost, gradually occur the substitute products of copper on the market, and resource of the aluminium in China is very abundant, and
It with excellent conduction, heat conductivility, is widely used in fields such as electrician, electrical, electrovacuum industry, with electrician, electrical, electricity
The further development of vacuum industry, the requirement to aluminum material is higher and higher, is difficult to accomplish to produce in batches and reach in traditional handicraft
To required every mechanical performance.
Invention content
In order to overcome shortcoming and defect in the prior art, the purpose of the present invention is to provide a kind of electroconductive aluminium strips
Heat treatment process, the heat treatment process make electroconductive aluminium strip by using quenching treatment, natural aging treatment and dual ageing treatment
Reach required elongation percentage, conductivity and mechanical performance.
The purpose of the present invention is achieved through the following technical solutions：A kind of heat treatment process of electroconductive aluminium strip, including walking as follows
Suddenly：
A, raw material is melted：It is required according to the weight percent of aluminium alloy stock ingredient, aluminium bar is made in melted aluminium alloy stock；
B, Homogenization Treatments：The aluminium bar that step A is melted removes epidermis, and heating carries out Homogenization Treatments, Ran Houleng
But to room temperature；
C, extrusion forming：Aluminium bar after step B Homogenization Treatments is subjected to the pre-heat treatment, while by extrusion cylinder and extrusion die
Tool carries out the pre-heat treatment, then takes out extrusion die, is assembled in extruder, takes out aluminium bar, is filled to squeezing for extrusion die
Pressure cylinder carries out extrusion forming, obtains aluminium row；
D, quenching treatment：The exit that aluminium after step C extrusion formings is come to extrusion cylinder is carried out at online water spray quenching
Reason；
E, natural aging treatment：Aluminium after step D quenching treatments is come and carries out natural aging treatment at room temperature；
F, dual ageing treatment：Aluminium after step E natural aging treatments is arranged, dual ageing treatment is carried out, then cools down
To room temperature, electroconductive aluminium strip is made.
Preferably, in the step A, the chemical composition of aluminium alloy includes the element of following weight percent：Si：
0.45%-0.55%, Fe：0.2%-0.4%, Cu：0.03%-0.07%, Mg：0.65%-0.75%, remaining impurity element list
A≤0.03%, remaining impurity element summation≤0.10%, surplus Al.The impurity element for Ca, Zn, V, Pb, Sn, Bi,
The elements such as Sb or Na.
The present invention replaces expensive conducting copper with electroconductive aluminium strip, the chemical composition of aluminium alloy be common alloys member
Element has no rare earth element or other precious metals, and the cost of raw material is relatively low, and the weight for passing through strictly control each element is matched
Than electroconductive aluminium strip obtained has good elongation percentage, conductivity and mechanical and physical performance.
Preferably, in the step A, the chemical composition of aluminium alloy includes the element of following weight percent：Si：
0.47%-0.53%, Fe：0.25%-0.35%, Cu：0.04%-0.06%, Mg：0.67%-0.73%, remaining impurity element
Single≤0.02%, remaining impurity element summation≤0.06%, surplus Al.
It is furthermore preferred that in the step A, the chemical composition of aluminium alloy includes the element of following weight percent：Si：
0.50%, Fe：0.30%, Cu：0.05%, Mg：0.70%, remaining impurity element is single≤and 0.01%, remaining impurity element is total
With≤0.03%, surplus Al.
Preferably, in the step A, the chemical composition of aluminium alloy further includes the element of following weight percent：W：0.2-
0.6%th, Yb：0.1-0.5%, Sn：0.16-0.24%, Sc：0.04-0.08%, Zr：0.02-0.06%, Y：0.01-
0.05%th, As：0.005-0.009%, Sr：0.004-0.008%, B：0.002-0.006% and Hf：0.001-0.005%.
The aluminium alloy of the present invention strictly controls the weight proportion of each element by using above-mentioned element, and aluminium obtained closes
Golden intensity is preferable, fine corrosion resistance, also with splendid, the excellent weld characteristics of processing performance and plating resistance, toughness it is high and
It indeformable after processing, the fine and close zero defect of material and is easily polished, the good characteristics such as film of painting is easy, oxidation effectiveness is splendid.
More preferably, in the step A, the chemical composition of aluminium alloy further includes the element of following weight percent：W：
0.3-0.5%, Yb：0.2-0.4%, Sn：0.18-0.22%, Sc：0.05-0.07%, Zr：0.03-0.05%, Y：0.02-
0.04%th, As：0.006-0.008%, Sr：0.005-0.007%, B：0.003-0.005% and Hf：0.002-0.004%.
More preferably, in the step A, the chemical composition of aluminium alloy further includes the element of following weight percent：W：
0.4%th, Yb：0.3%th, Sn：0.20%th, Sc：0.06%th, Zr：0.04%th, Y：0.03%th, As：0.007%th, Sr：0.006%th,
B：0.004% and Hf：0.003%.
Preferably, in the step B, the temperature of Homogenization Treatments is 400-420 DEG C, time 6-8h.
Means of the Homogenization Treatments as the metallurgical quality and extrusion performance for improving aluminium alloy, have become raising at present
The most important method of the metallurgical quality of aluminium alloy.Homogenization Treatments are to carry out long-time heating using in high temperature, make internal change
Study a point fully diffusion, therefore also known as diffusion annealing.The present invention, can by strictly controlling the temperature and times of Homogenization Treatments
To eliminate tissue defects, improving tissue makes homogenization of composition and crystal grain thinning, improves the mechanical property of alloy, reduces remaining answer
Power, while hardness can be improved, plasticity and toughness are improved, improves machinability.
Preferably, in the step C, the pre-heat treatment temperature of aluminium bar is 450-470 DEG C, time 3-5h.The present invention is logical
The temperature and time of stringent control the pre-heat treatment is crossed, extrusion process is normally carried out, ensures the quality of extruded product.
Preferably, in the step C, the pre-heat treatment temperature of extrusion cylinder is 430-450 DEG C, the pre-heat treatment of extrusion die
Temperature is 480-500 DEG C, time 2-4h.
Preferably, in the step C, the discharge port temperature of extrusion cylinder is 470-510 DEG C.
Extrusion temperature is most active factor in squeezing parameter, it not only influences the progress of extrusion process, has an effect on and receive
Rate, the quality of product and mechanical property etc..The present invention is by strictly controlling the pre-heat treatment temperature of extrusion cylinder and extrusion die
And the discharge port temperature of time and control extrusion cylinder, aluminium row is made to reach required elongation percentage, conductivity and mechanical performance.
Preferably, in the step D, the temperature of quenching treatment is 500-530 DEG C, and aluminum alloy surface temperature is after quenching
10-50℃。
Quenching refers to metal works being heated to a certain proper temperature and is kept for a period of time, immerses in quenching media immediately
A kind of metal heating processing technology being quickly cooled down.According to cooling means and cool down medium difference, quenching can be divided into single-stage quenching,
Interrupted quenching, martempering and austempering etc..Coordinated by quenching with the tempering of different temperatures, it can be with
The intensity, toughness and fatigue strength of metal are increased substantially, and the Different matching (comprehensive mechanical between these performances can be obtained
Can), to meet different requirements.The present invention by strictly control quenching treatment temperature and quenching after aluminum alloy surface temperature
Degree enables aluminum alloy to improve case hardness and increases wearability.
Preferably, in the step F, the temperature of first time ageing treatment is 160-170 DEG C, time 2-4h；Second
The temperature of ageing treatment is 340-350 DEG C, time 1-3h.
Dual ageing treatment is to carry out timeliness twice at different temperatures.Preageing is carried out in lower temperature, it is therefore intended that
Highdensity copper atom segregation area is obtained in aluminium alloy, since copper atom segregation area is typically homogeneous nucleation, when it reaches
After certain size, so that it may as the core of subsequent precipitated phase, so as to improve the uniformity of tissue.Keep certain in slightly higher temperature
Time carries out final timeliness, and since temperature is slightly higher, aluminium alloy enters the possibility increase in overaging area.The present invention is by strictly controlling
The temperature and time of first time ageing treatment and second of ageing treatment processed, improves the Fracture Toughness of aluminium alloy, and improve
The corrosion resistance of aluminium alloy, improves stress corrosion resistance.
The beneficial effects of the present invention are：The present invention replaces expensive conducting copper, the chemistry of aluminium alloy with electroconductive aluminium strip
Ingredient is common alloys element, has no rare earth element or other precious metals, the cost of raw material is relatively low, and passes through and strictly control
The weight proportion of each element processed, electroconductive aluminium strip obtained have good elongation percentage, conductivity and mechanical and physical performance.
The heat treatment process of the present invention makes conduction by using quenching treatment, natural aging treatment and dual ageing treatment
Aluminium row reaches required elongation percentage, conductivity and mechanical performance.
Specific embodiment
For the ease of the understanding of those skilled in the art, with reference to embodiment, the present invention is further illustrated, real
The content that the mode of applying refers to not is limitation of the invention.
Embodiment 1
A kind of heat treatment process of electroconductive aluminium strip, includes the following steps：
A, raw material is melted：It is required according to the weight percent of aluminium alloy stock ingredient, aluminium bar is made in melted aluminium alloy stock；
B, Homogenization Treatments：The aluminium bar that step A is melted removes epidermis, and heating carries out Homogenization Treatments, Ran Houleng
But to room temperature；
C, extrusion forming：Aluminium bar after step B Homogenization Treatments is subjected to the pre-heat treatment, while by extrusion cylinder and extrusion die
Tool carries out the pre-heat treatment, then takes out extrusion die, is assembled in extruder, takes out aluminium bar, is filled to squeezing for extrusion die
Pressure cylinder carries out extrusion forming, obtains aluminium row；
D, quenching treatment：The exit that aluminium after step C extrusion formings is come to extrusion cylinder is carried out at online water spray quenching
Reason；
E, natural aging treatment：Aluminium after step D quenching treatments is come and carries out natural aging treatment at room temperature；
F, dual ageing treatment：Aluminium after step E natural aging treatments is arranged, dual ageing treatment is carried out, then cools down
To room temperature, electroconductive aluminium strip is made.
In the step A, the chemical composition of aluminium alloy includes the element of following weight percent：Si：0.45%, Fe：
0.20%, Cu：0.03%, Mg：0.65%, remaining impurity element is single≤and 0.03%, remaining impurity element summation≤0.10%,
Surplus is Al.
In the step B, the temperature of Homogenization Treatments is 400 DEG C, time 6h.
In the step C, the pre-heat treatment temperature of aluminium bar is 450 DEG C, and the time 3, the pre-heat treatment temperature of extrusion cylinder is
430 DEG C, the pre-heat treatment temperature of extrusion die is 480 DEG C, time 2h.
In the step C, the discharge port temperature of extrusion cylinder is 470 DEG C.
In the step D, the temperature of quenching treatment is 500 DEG C, and aluminum alloy surface temperature is 10 DEG C after quenching.
In the step F, the temperature of first time ageing treatment is 160 DEG C, time 2h；The temperature of second of ageing treatment
It is 340 DEG C, time 1h.
Embodiment 2
The present embodiment and above-described embodiment 1 difference lies in：
In the step A, the chemical composition of aluminium alloy includes the element of following weight percent：Si：0.48%, Fe：
0.25%, Cu：0.04%, Mg：0.68%, remaining impurity element is single≤and 0.03%, remaining impurity element summation≤0.10%,
Surplus is Al.
In the step B, the temperature of Homogenization Treatments is 405 DEG C, time 6.5h.
In the step C, the pre-heat treatment temperature of aluminium bar is 455 DEG C, time 3.5h, the pre-heat treatment temperature of extrusion cylinder
It it is 435 DEG C, the pre-heat treatment temperature of extrusion die is 485 DEG C, time 2.5h.
In the step C, the discharge port temperature of extrusion cylinder is 480 DEG C.
In the step D, the temperature of quenching treatment is 507 DEG C, and aluminum alloy surface temperature is 20 DEG C after quenching.
In the step F, the temperature of first time ageing treatment is 162 DEG C, time 2.5h；The temperature of second of ageing treatment
It is 342 DEG C to spend, time 1.5h.
Embodiment 3
The present embodiment and above-described embodiment 1 difference lies in：
In the step A, the chemical composition of aluminium alloy includes the element of following weight percent：Si：0.50%, Fe：
0.30%, Cu：0.05%, Mg：0.70%, remaining impurity element is single≤and 0.02%, remaining impurity element summation≤0.06%,
Surplus is Al.
In the step B, the temperature of Homogenization Treatments is 410 DEG C, time 7h.
In the step C, the pre-heat treatment temperature of aluminium bar is 460 DEG C, time 4h, and the pre-heat treatment temperature of extrusion cylinder is
440 DEG C, the pre-heat treatment temperature of extrusion die is 490 DEG C, time 3h.
In the step C, the discharge port temperature of extrusion cylinder is 490 DEG C.
In the step D, the temperature of quenching treatment is 515 DEG C, and aluminum alloy surface temperature is 30 DEG C after quenching.
In the step F, the temperature of first time ageing treatment is 165 DEG C, time 3h；The temperature of second of ageing treatment
It is 345 DEG C, time 2h.
Embodiment 4
The present embodiment and above-described embodiment 1 difference lies in：
In the step A, the chemical composition of aluminium alloy includes the element of following weight percent：Si：0.52%, Fe：
0.35%, Cu：0.06%, Mg：0.72%, remaining impurity element is single≤and 0.02%, remaining impurity element summation≤0.06%,
Surplus is Al.
In the step B, the temperature of Homogenization Treatments is 415 DEG C, time 7.5h.
In the step C, the pre-heat treatment temperature of aluminium bar is 465 DEG C, time 4.5h, the pre-heat treatment temperature of extrusion cylinder
It it is 445 DEG C, the pre-heat treatment temperature of extrusion die is 495 DEG C, time 3.5h.
In the step C, the discharge port temperature of extrusion cylinder is 500 DEG C.
In the step D, the temperature of quenching treatment is 522 DEG C, and aluminum alloy surface temperature is 40 DEG C after quenching.
In the step F, the temperature of first time ageing treatment is 168 DEG C, time 3.5h；The temperature of second of ageing treatment
It is 348 DEG C to spend, time 2.5h.
Embodiment 5
The present embodiment and above-described embodiment 1 difference lies in：
In the step A, the chemical composition of aluminium alloy includes the element of following weight percent：Si：0.55%, Fe：
0.4%, Cu：0.07%, Mg：0.75%, remaining impurity element is single≤and 0.01%, remaining impurity element summation≤0.03%,
Surplus is Al.
In the step B, the temperature of Homogenization Treatments is 420 DEG C, time 8h.
In the step C, the pre-heat treatment temperature of aluminium bar is 470 DEG C, time 5h, and the pre-heat treatment temperature of extrusion cylinder is
450 DEG C, the pre-heat treatment temperature of extrusion die is 500 DEG C, time 4h.
In the step C, the discharge port temperature of extrusion cylinder is 510 DEG C.
In the step D, the temperature of quenching treatment is 530 DEG C, and aluminum alloy surface temperature is 50 DEG C after quenching.
In the step F, the temperature of first time ageing treatment is 170 DEG C, time 4h；The temperature of second of ageing treatment
It is 350 DEG C, time 3h.
Embodiment 6
The present embodiment and above-described embodiment 1 the difference lies in：In the step A, the chemical composition of aluminium alloy is also wrapped
Include the element of following weight percent：W：0.2%th, Yb：0.1%th, Sn：0.16%th, Sc：0.04%th, Zr：0.02%th, Y：
0.01%th, As：0.005%th, Sr：0.004%th, B：0.002% and Hf：0.001%.
Embodiment 7
The present embodiment and above-described embodiment 2 the difference lies in：In the step A, the chemical composition of aluminium alloy is also wrapped
Include the element of following weight percent：W：0.3%th, Yb：0.2%th, Sn：0.18%th, Sc：0.05%th, Zr：0.03%th, Y：
0.02%th, As：0.006%th, Sr：0.005%th, B：0.003% and Hf：0.002%.
Embodiment 8
The present embodiment and above-described embodiment 3 the difference lies in：In the step A, the chemical composition of aluminium alloy is also wrapped
Include the element of following weight percent：W：0.4%th, Yb：0.3%th, Sn：0.20%th, Sc：0.06%th, Zr：0.04%th, Y：
0.03%th, As：0.007%th, Sr：0.006%th, B：0.004% and Hf：0.003%.
Embodiment 9
The present embodiment and above-described embodiment 4 the difference lies in：In the step A, the chemical composition of aluminium alloy is also wrapped
Include the element of following weight percent：W：0.5%th, Yb：0.4%th, Sn：0.22%th, Sc：0.07%th, Zr：0.05%th, Y：
0.04%th, As：0.008%th, Sr：0.007%th, B：0.005% and Hf：0.004%.
Embodiment 10
The present embodiment and above-described embodiment 5 the difference lies in：In the step A, the chemical composition of aluminium alloy is also wrapped
Include the element of following weight percent：W：0.6%th, Yb：0.5%th, Sn：0.24%th, Sc：0.08%th, Zr：0.06%th, Y：
0.05%th, As：0.009%th, Sr：0.008%th, B：0.006% and Hf：0.005%.
The mechanical and physical performance of electroconductive aluminium strip is as shown in the table made from embodiment 1-5.
As can be seen from the above table, tensile strength >=200MPa of electroconductive aluminium strip of the invention, yield strength >=170MPa are prolonged
Stretch rate >=20%, defectoscope detection folding HB >=71；The electroconductive aluminium strip of the present invention uses bender in bending test and carrying out flaw detection
By sheet metal bending to 90 °, bending part interior tissue then being detected with defectoscope, finding, there is no there is fracture or damage, have
Preferable yield strength, hardness and ductility；The electroconductive aluminium strip of the present invention with conductometric detector detect conductivity IACS >=
49.2%, there is good conductivity.
Above-described embodiment is the preferable implementation of the present invention, and in addition to this, the present invention can be realized with other manner,
Any obvious replacement is not departed under the premise of present inventive concept within protection scope of the present invention.
Claims (5)
1. a kind of heat treatment process of electroconductive aluminium strip, it is characterised in that：Include the following steps：
A, raw material is melted：It is required according to the weight percent of aluminium alloy stock ingredient, aluminium bar is made in melted aluminium alloy stock；
B, Homogenization Treatments：The aluminium bar that step A is melted removes epidermis, and heating carries out Homogenization Treatments, is subsequently cooled to
Room temperature；
C, extrusion forming：Aluminium bar after step B Homogenization Treatments is subjected to the pre-heat treatment, at the same by extrusion cylinder and extrusion die into
Row the pre-heat treatment, then takes out extrusion die, is assembled in extruder, takes out aluminium bar, is filled to the extrusion cylinder of extrusion die
Extrusion forming is carried out, obtains aluminium row；
D, quenching treatment：The exit that aluminium after step C extrusion formings is come to extrusion cylinder carries out online water spray quenching processing；
E, natural aging treatment：Aluminium after step D quenching treatments is come and carries out natural aging treatment at room temperature；
F, dual ageing treatment：Aluminium after step E natural aging treatments is arranged, carries out dual ageing treatment, is subsequently cooled to often
Electroconductive aluminium strip is made in temperature；
In the step A, the chemical composition of aluminium alloy is made of the element of following weight percent：Si：0.45%-0.55%,
Fe：0.2%-0.4%, Cu：0.03%-0.07%, Mg：0.65%-0.75%, remaining impurity element is single≤and 0.03%,
Remaining impurity element summation≤0.10%, surplus Al；
In the step D, the temperature of quenching treatment is 500-522 DEG C or 530 DEG C, and aluminum alloy surface temperature is 10-50 after quenching
℃；
In the step C, the pre-heat treatment temperature of aluminium bar is 450-470 DEG C, time 3-5h；
In the step C, the pre-heat treatment temperature of extrusion cylinder is 430-450 DEG C, and the pre-heat treatment temperature of extrusion die is 480-
500 DEG C, time 2-4h；
In the step C, the discharge port temperature of extrusion cylinder is 470-510 DEG C.
2. a kind of heat treatment process of electroconductive aluminium strip according to claim 1, it is characterised in that：In the step A, aluminium closes
The chemical composition of gold is made of the element of following weight percent：Si：0.47%-0.53%, Fe：0.25%-0.35%, Cu：
0.04%-0.06%, Mg：0.67%-0.73%, remaining impurity element is single≤and 0.02%, remaining impurity element summation
≤
0.06%, surplus Al.
3. a kind of heat treatment process of electroconductive aluminium strip according to claim 1, it is characterised in that：In the step A, aluminium closes
The chemical composition of gold is made of the element of following weight percent：Si：0.50%, Fe：0.30%, Cu：0.05%, Mg：
0.70%, remaining impurity element is single≤and 0.01%, remaining impurity element summation≤0.03%, surplus Al.
4. a kind of heat treatment process of electroconductive aluminium strip according to claim 1, it is characterised in that：In the step B, uniformly
The temperature for changing processing is 400-420 DEG C, time 6-8h.
5. a kind of heat treatment process of electroconductive aluminium strip according to claim 1, it is characterised in that：In the step F, first
The temperature of secondary ageing treatment is 160-170 DEG C, time 2-4h；The temperature of second of ageing treatment is 340-350 DEG C, and the time is
1-3h。
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| CN114000017A (en) * | 2020-07-27 | 2022-02-01 | 湖南稀土金属材料研究院 | High-strength high-conductivity aluminum alloy conductor material and preparation method thereof |
| CN113699419A (en) * | 2021-09-03 | 2021-11-26 | 河南中多铝镁新材有限公司 | Preparation process of aluminum alloy induction cover plate |
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