A production method for aluminum alloy / metal layered composite strip profile coil

Abstract

The present invention relates to a production method of aluminum alloy / metal layered composite strip profile coils. The present invention transforms the existing continuous coating extruder, adopts two metal strips stacked together, and synchronously inputs them into the mold of the tangential double-wheel single-groove continuous coating extruder under the action of traction. The two layers of metal strips support each other during the extrusion process and can move synchronously. Under the action of extrusion force, they move with the aluminum strip, effectively solving the problem that the metal strips cannot flow out synchronously with the aluminum. At the same time, by pre-online roughening treatment and electric induction heating on the proposed joint surface of the metal strip, the joint strength of the aluminum alloy / metal interface is effectively improved through the combined effects of continuous extrusion of the aluminum alloy rod blank, deformation heat generated by friction, and large plastic deformation. In addition, through rapid cooling horizontal continuous casting and online water-cooling quenching treatment, the solid solution quenching process is omitted and direct artificial aging treatment can also obtain a higher aluminum alloy hardness, which can be applied to the production of various types of aluminum alloy / metal layered composite strip profile coils.

Description

Technical Field

[0001] The invention relates to the technical field of metal plastic processing, and in particular to a method for producing an aluminum alloy / metal layered composite strip profile coil. Background Art

[0002] Aluminum-based metal layered composite materials have the characteristics of light weight, high strength, good thermal conductivity and corrosion resistance, and easy processing and forming, which provide better material choices for rational material selection and cost reduction. With the rapid development of 3C technology, layered composite profiles such as aluminum alloy / stainless steel or aluminum alloy / titanium alloy are gradually replacing all stainless steel or all aluminum alloy frame materials, and the demand is increasing rapidly.

[0003] At present, there are two main methods for 3C 6013 aluminum alloy / stainless steel layered composite coil profiles: strip hot rolling composite method and plate hot rolling composite method. The former is to composite 6013 aluminum alloy extruded flat strip coil and stainless steel coil strip by single hot rolling method, and then cut into finished products after trimming and fine drawing, and finally carry out solid solution quenching and artificial aging treatment to make the aluminum alloy reach its strength or hardness requirements; the latter is to composite 6013 aluminum alloy narrow coil plate and stainless steel coil strip by hot rolling method, and then cut into finished products after fine rolling and stripping, and finally carry out solid solution quenching and artificial aging treatment to make the aluminum alloy reach its strength or hardness requirements. Both of the above methods use hot rolling composite technology, and the bonding strength of hot rolling composite is affected by the degree of oxidation during the heating process of the bonding interface, the hot rolling temperature and the amount of reduction. For heat-treatable strengthened aluminum alloy layered composite materials, solid solution heating and quenching treatment must be performed subsequently. The process operation is quite difficult for rolled composite materials, and the layered composite materials are very likely to produce product quality problems such as cracking, separation and deformation due to the difference in linear expansion coefficients of the two metals during the subsequent solid solution quenching treatment. In order to solve the above problems, the applicant proposed a prior invention patent application CN114231862A, which discloses a production process for narrow coiled aluminum alloy sheets in T4P state and its application in steel-aluminum hot rolling composites. However, in order to prevent precipitation during the heating process of the aluminum alloy, which leads to a decrease in its strength or hardness, the rapid heating and rapid cooling rates must be strictly controlled during the implementation of this solution.

[0004] Continuous coating extrusion has been widely used in the production of aluminum-clad steel wires. However, this type of continuous coating extrusion method is used to prepare layered coating materials or fully enclosed coating materials, such as aluminum-clad steel wires and aluminum-clad stainless steel special-shaped tubes. For details, see Zhong Yi's "Continuous Extrusion Technology and Its Application", Metallurgical Industry Press, 2004. Similarly, for example, CN104722591B or CN203842939U, a thicker metal round tube is horizontally input into the middle feed port, and the aluminum alloy coating material is extruded and coated on the upper and lower sides of the metal round tube through a tangential double-wheel single-groove continuous coating extruder. Patent CN102794324B proposes a method for preparing a steel-aluminum composite conductive rail by continuous extrusion bimetallic composite technology, but during the implementation of this method, the extrusion force generated by the continuous extrusion process is insufficient to overcome the friction resistance generated by the stainless steel belt and the supporting bottom plate under high pressure. Therefore, it is usually difficult to make the aluminum alloy profile flow out of the die hole synchronously to form a steel-aluminum composite product. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the many problems existing in the current hot-rolled composite material production process of aluminum alloy-based composite materials, and in combination with the technical requirements of aluminum alloy / metal layered composite materials for 3C, the present invention provides a method for producing aluminum alloy / metal layered composite strip profile coils, which can produce aluminum alloy / metal layered composite strip profile coil products with high aluminum alloy / metal joint surface shear strength and high aluminum alloy hardness.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0009] In a first aspect, the present invention provides a method for producing an aluminum alloy / metal layered composite strip profile coil, comprising:

[0010] S1. Two aluminum alloy disc round rod billets are synchronously fed into a modified tangential double-wheel single-groove continuous cladding extruder, and a metal laminated strip is introduced from a horizontal feed port of the tangential double-wheel single-groove continuous cladding extruder, and a horizontal tension is applied to the metal laminated strip to make it move horizontally in the tangential double-wheel single-groove continuous cladding extruder; the metal laminated strip is composed of two metal strips laminated together; before the metal laminated strip enters the tangential double-wheel single-groove continuous cladding extruder, its intended joint surface has been pre-roughened and pre-heated by electric induction;

[0011] The modified tangential double-wheel single-groove continuous coating extruder is to adjust the size and shape of the feed port and the extrusion die of the tangential double-wheel single-groove continuous coating extruder so that the feed port can be used to feed the metal laminated strip horizontally, and the cross-section of the extrusion die is adjusted according to the shape of the target product;

[0012] The internal temperature of the extrusion die of the tangential double-wheel single-groove continuous cladding extruder is controlled to be 400-450° C. (preferably 420-430° C.); a rough laminar composite strip profile is obtained by extruding the aluminum alloy disc round rod billet and the metal laminated strip;

[0013] S2, performing online water rapid cooling and quenching treatment on the rough blank of the layered composite strip profile coming out of the tangential double-wheel single-groove continuous coating extruder;

[0014] S3, performing a drawing, peeling and trimming process to obtain a layered composite strip profile, dividing the layered composite strip profile into two between the overlapping surfaces of the metal overlapping strips, and separating them into rolls;

[0015] S4. Artificial aging treatment.

[0016] Preferably, in S1, the two aluminum alloy disc round rod billets are 6013 aluminum alloy disc round rod billets prepared by rapid cooling horizontal continuous casting, and have uniform internal structure, fine grain size, small interdendritic segregation, and high alloy solid solubility.

[0017] Preferably, in S1, before the metal laminated strip enters the tangential double-wheel single-groove continuous cladding extruder, the metal laminated strip is preheated to 380-450° C., preferably 400-420° C. by electric induction. No heating component is provided in the wheel groove itself, but the metal laminated strip before entering the wheel groove is preheated by electric induction, and the temperature is maintained at 400-450° C. by mechanical extrusion and friction in the wheel groove.

[0018] Preferably, in S1, the thickness of a single metal strip in the metal laminated strip is 2-5 mm, and the width is 5-12 mm; in the rough blank of the layered composite strip profile obtained by extrusion, the thickness of the aluminum alloy is 3-8 mm, and the width is 5-12 mm.

[0019] Preferably, in S1, the temperature of the rough layered composite strip profile output from the tangential double-wheel single-groove continuous coating extruder (i.e., the product outlet temperature of the tangential double-wheel single-groove continuous coating extruder) is controlled to be 490-530°C, preferably 500-520°C.

[0020] Preferably, in S1, the horizontal tension applied to the metal laminated strip is 30-60% (preferably 40-50%) of the metal yield strength. By setting the horizontal tension to pull the metal laminated strip, the horizontal tension is 30-50% of the yield strength of the steel, which is beneficial to the upper and lower balance of the laminated strip, and is also beneficial to the advancement of the steel strip and the mutual extrusion with the aluminum alloy disc round rod.

[0021] Preferably, in S3, the drawing, stripping and trimming treatment includes drawing and deforming the rough layered composite strip profile to control the deformation of the aluminum alloy to 1-5% (preferably 2-3%); at the same time, knife edges are symmetrically arranged on both sides of the metal laminated strip to peel off the aluminum alloy flash on the side of the rough layered composite strip profile.

[0022] This step takes into account both small deformation drawing and trimming and peeling. While peeling off the aluminum alloy flash on the side of the rough layered composite strip profile, the aluminum alloy layer is drawn / extruded to prevent cracking at the joint between the aluminum alloy and the metal strip caused by drawing and trimming, and further improve the dimensional accuracy of the layered composite strip profile.

[0023] Preferably, in S4, the artificial aging treatment conditions are: keeping warm at a temperature of 120-155° C. for 4-12 h; preferably keeping warm at a temperature of 135-145° C. for 6-10 h.

[0024] Preferably, the proposed joining surface of the metal laminating strip is roughened by using an abrasive belt.

[0025] According to a preferred embodiment of the present invention, in S1, the two aluminum alloy disc round rod billets are 6013 aluminum alloy disc round rod billets prepared by rapid cooling horizontal continuous casting.

[0026] According to a preferred embodiment of the present invention, in S1, the rough layered composite strip profile is continuously output from the tangential double-wheel single-groove continuous cladding extruder under tension traction, and the tension is 30-60% (preferably 40-50%) of the metal yield strength.

[0027] According to a preferred embodiment of the present invention, in S3, the rolls can be separated by weight or length according to user requirements.

[0028] Before S1, the metal strip needs to be rolled and two metal strips need to be put together through straightening guide rollers.

[0029] The metal strips include but are not limited to stainless steel strips and other metals, such as titanium alloy strips; the metal laminated strips are composed of two stainless steel strips laminated together.

[0030] (III) Beneficial effects

[0031] (1) In order to solve the technical problem in the prior art that the extrusion force is insufficient to overcome the friction resistance generated by the metal strip and the supporting bottom plate under high pressure, making it difficult to make the aluminum alloy profile flow out synchronously, the present invention uses a modified tangential double-wheel single-groove continuous cladding extruder, and adopts a double-strip metal strip that is stacked together and is synchronously input into the tangential double-wheel single-groove continuous cladding extruder under the action of traction. The two layers of steel strips are mutually synchronously moving support surfaces (equivalent to the mold core) during the extrusion process, and move with the aluminum strip under the action of the extrusion force, effectively solving the problem that the steel and aluminum cannot flow out synchronously. In addition, by pre-online roughening treatment and electric induction heating on the intended joint surface of the metal strip, the continuous extrusion of the aluminum alloy rod blank and the metal strip by the tangential double-wheel single-groove continuous cladding extruder, the deformation heat generated by friction and the large plastic deformation, etc., effectively improve the joint strength of the aluminum alloy / metal interface.

[0032] (2) In a preferred embodiment of the present invention, after obtaining the aluminum alloy / metal layered composite strip profile rough billet from the tangential double-wheel single-groove continuous cladding extruder, the rough billet is subjected to online water cooling and rapid quenching treatment to ensure the solid solubility of the aluminum alloy, so that a higher aluminum alloy hardness can be obtained after subsequent artificial aging treatment.

[0033] (3) In a preferred embodiment of the present invention, the aluminum alloy / metal blank that has undergone online water cooling and quenching treatment is subjected to stripping and trimming of the aluminum alloy flash on the metal side of the composite product, while the aluminum alloy portion is extruded / drawn with a small deformation amount (1-5%) to ensure that the bonding strength between the 6013 aluminum alloy / metal is not affected by the drawing and trimming, and to improve the dimensional accuracy of the composite strip profile.

[0034] (4) The aluminum alloy rod blank used in the present invention is a 6013 aluminum alloy disc round rod blank with uniform internal structure, fine grain size, small interdendritic segregation, and high alloy solid solubility prepared by rapid cooling horizontal continuous casting, and then combined with continuous hot extrusion to obtain an aluminum alloy flat bar / metal composite layered material rough blank, and then online water cooling and rapid quenching are performed to ensure the hardness of the aluminum alloy part in the aluminum alloy / metal layered composite strip profile coil.

[0035] The product of the present invention does not need to be subjected to solution quenching treatment after compounding, which not only reduces the production process but also increases the straightening rate during the straightening process of the composite strip profile.

[0036] The production method of the present invention can be applied to the production of layered composite strip profile coils of aluminum alloy and metal, or aluminum alloy and other metals such as titanium alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the structure of the modified tangential double-wheel single-groove continuous coating extruder used.

[0038] Figure 2The present invention is a flow chart of the production method of the aluminum alloy / metal layered composite strip profile coil. DETAILED DESCRIPTION

[0039] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0040] like Figure 1 As shown, the tangential double-wheel single-groove continuous coating extruder of the present invention includes a first extrusion wheel 1 and a second extrusion wheel 2 that are symmetrically facing each other from top to bottom, and there is a spacing between the first extrusion wheel 1 and the second extrusion wheel 2; a first plug 11 is provided in the tangential direction below the first extrusion wheel 1, and a second plug 21 is provided in the tangential direction above the second extrusion wheel 2, the first plug 11 and the second plug 21 are symmetrical and have a first spacing, and the first spacing constitutes a horizontal feed inlet for the metal laminated strip, or the first plug 11 and the second plug 21 are an integral component and a horizontal channel is opened in the middle, and the horizontal channel constitutes a horizontal feed inlet for the metal laminated strip. The first plug 11 and the second plug 21 are in a facing relationship with the rotation direction of the first pressure wheel 1 and the second extrusion wheel 2, respectively.

[0041] A first extrusion shoe 12 is provided on the other side of the first extrusion wheel 1. A curved surface is provided on the side of the first extrusion shoe 12 opposite to the first extrusion wheel 1. A groove sealing block 121 is provided on the curved surface. A second extrusion shoe 22 is provided on the other side of the second extrusion wheel 2. A curved surface is provided on the side of the second extrusion shoe 22 opposite to the second extrusion wheel 2. A groove sealing block 221 is provided on the curved surface. Figure 1 As shown, an aluminum alloy rod blank is fed between the groove seal block 121 of the first extrusion shoe and the first extrusion wheel 1, and between the groove seal block 221 of the second extrusion shoe and the second extrusion wheel 2. A first extrusion die 123 is provided at one end of the first extrusion shoe 12 close to the first extrusion wheel 1, and a second extrusion die 223 is provided at one end of the second extrusion shoe 22 close to the second extrusion wheel 2. The first extrusion die 123 is located on a tangent below the first extrusion wheel 1, and the second extrusion die 223 is located on a tangent above the second extrusion wheel 2. The thickness and length of the first extrusion die 123 and the second extrusion die 223 are used to control the degree of extrusion deformation of the aluminum alloy rod blank. The first extrusion shoe 12 and the second extrusion shoe 22 are symmetrical and have a second spacing, and the second spacing forms an extrusion die. The horizontal feed port of the metal laminated strip is connected to the extrusion die.

[0042] When an aluminum alloy rod blank 80 is fed synchronously from the groove seal 121 of the first extrusion shoe 12 and the first extrusion wheel 1 and from the groove seal 221 of the second extrusion shoe 22 and the second extrusion wheel 2, two metal laminated strips 70 are fed from the horizontal feed port at the same time, and the metal laminated strips 70 move at a uniform speed under the traction of the forward tension. Under the rotational extrusion of the first extrusion wheel 1 and the second extrusion wheel 2, the aluminum alloy rod blank 80 is extruded and composited on the upper and lower surfaces of the metal laminated strip 70, and the layered composite strip profile rough blank 60 is output from the extrusion die. The layered composite strip profile rough blank 60 is continuously output under the blocking effect of the first and second plugs 11 and 21 and the external traction tension. Among them, the layered composite strip profile rough blank 60 is actually composed of two layers of aluminum alloy / metal layered composite strip profiles. A pressing wheel 30 is provided adjacent to the outside of the first extrusion wheel 1 and the second extrusion wheel 2, and the pressing wheel 30 is used to fix the aluminum alloy rod blank so that the aluminum alloy rod blank is extruded and smoothly enters the extrusion die of the extruder. Figure 1 By comparing with the prior art CN104722591B, the difference between the two can be understood. The main improvement lies in adjusting the horizontal feed port and size of the metal tube so that the horizontal feed port can just provide continuous horizontal feeding of a group of metal overlapping strips, and adjusting the shape and size of the extrusion die to adapt to the structure and size requirements of the target product.

[0043] like Figure 2 As shown, it is a production flow chart of an aluminum alloy / metal layered composite strip profile coil material of the present invention, including: preparing an aluminum alloy disc round rod billet with uniform internal structure, fine grain size, small interdendritic segregation, and high alloy solid solubility through rapid cooling horizontal continuous casting. The produced aluminum alloy disc round rod billets are fed into a tangential double-wheel single-groove continuous cladding extruder in groups of two, and at the same time, two rolls of metal strips are overlapped by unwinding and straightening guide rollers to obtain two overlapped steel strips, and then the upper and lower exposed surfaces of the overlapped steel strips are roughened by sanding belts or the like to improve the bonding strength between them and the aluminum alloy layer. Before the metal strip enters the extrusion die of the tangential double-wheel single-groove continuous cladding extruder, the metal overlapped strip is preheated to 380-450°C, preferably 400-420°C by induction heating. The tangential double-wheel single-groove continuous cladding extruder is used to continuously extrude the aluminum alloy rod billets and the metal laminated strips, and the friction, deformation heat and large plastic deformation of the continuous extrusion process are combined to transform the two aluminum alloy rod billets into two aluminum alloy flat bars, which are tightly bonded with the upper and lower bonding surfaces of the metal laminated strips to form an aluminum alloy / metal layered composite strip profile rough billet. At the rough billet outlet, water immersion / water spraying is used for online rapid cooling and quenching, and then the rough billet is rolled up through a gantry wire-winding machine.

[0044] Afterwards, the rolled layered composite strip profile rough blank 60 is subjected to drawing, peeling and trimming treatment. On a crawler or cam type drawing machine, the aluminum alloy flash on the side of the layered composite strip profile rough blank is peeled and trimmed, and at the same time, the aluminum alloy part of the rough blank is subjected to small deformation drawing treatment, and the aluminum alloy deformation is controlled to be 1-5%, preferably 2-3%. Afterwards, the profile is divided into two between the overlapping surfaces of the two metal strips and rolled up separately.

[0045] While the rough layered composite strip profile is being drawn with a small deformation, cutting edges are symmetrically arranged on both sides of the metal laminated strip to peel off the aluminum alloy flash on the side of the rough layered composite strip profile, so as to prevent the main part of the aluminum alloy from being pulled during the peeling process, thereby affecting the bonding strength between the aluminum alloy layer and the metal layer (stainless steel strip).

[0046] Finally, the aluminum alloy / metal layered composite strip profile is artificially treated for a period of time, and is kept at a temperature of 120-155° C. for 4-12 hours; preferably, it is kept at 135-145° C. for 6-10 hours, so as to strengthen and obtain a higher hardness of the aluminum alloy.

[0047] The following is a description of the present invention in conjunction with specific embodiments.

[0048] Example 1

[0049] This embodiment provides a method for producing a 6013 aluminum alloy / stainless steel layered composite strip profile coil, which uses Figure 2 The production system shown in the figure is used for production. The weight of a single roll is not less than 500Kg, which is used for CNC processing into mobile phone frames. The requirements are that the thickness of 6013 aluminum alloy is 5mm, the hardness is not less than 120Hv, the thickness of stainless steel is 2mm, the width of steel-aluminum composite strip profile is 10mm, and the shear strength of the joint surface is greater than 70MPa. The production process of the layered composite strip profile coil is as follows:

[0050] (1) Horizontal continuous casting of 6013 aluminum alloy: 99.7% aluminum ingot, quick-dissolving Si, magnesium ingot and Al-5Mn, Al-5Cr, Al-10Cu master alloys were used. The weight ratio of each alloy was calculated according to the chemical composition range of 6013 aluminum alloy. The ingredients were mixed according to this ratio. After melting, refining, heat preservation and online filtration in a double 1000 kg gas melting furnace, samples were taken for alloy chemical composition detection, as shown in Table 1. Horizontal continuous casting was used to continuously cast a rod billet with a diameter of 10 mm. The continuous casting temperature was controlled at 710-720 ° C and the casting speed was set at 800 mm / min.

[0051] Table 1 Main chemical composition of 6013 aluminum alloy of the present invention (weight percentage, %)

[0052]

[0053]

[0054] (2) Lamination of two stainless steel strips and online surface roughening and induction heating: 2×10 mm annealed 316L stainless steel strips were purchased from the market. Two strips were put together to form a stainless steel laminated strip through a straightening guide roller. The strips entered the abrasive belt roughening machine for online roughening of the upper and lower surfaces to be bonded together. The strips passed through a 200Kw induction heater and were led to the winder to form tension traction. The tension was set to 140 MPa (the yield strength of 316L stainless steel is about 280 MPa).

[0055] (3) Double-wheel single-groove double-belt continuous composite extrusion forming: Two 6013 aluminum alloy disc round rod billets with a diameter of 10 mm obtained by horizontal continuous casting are fed into the upper and lower extrusion wheel grooves of the 315 type tangential continuous cladding machine, and the stainless steel laminated strips are heated at the same time. The heating power is adjusted to make the surface temperature of the stainless steel laminated strip reach 400-410℃. Through double-wheel single-groove continuous composite extrusion forming, such as Figure 1 As shown, the extrusion wheel groove temperature is 420℃ and the outlet temperature of the extruded composite product is 510℃.

[0056] (4) Online water quenching and coiling: The composite product is quickly cooled and quenched by cooling water 80 cm away from the discharge port of the double-wheel single-groove double-belt continuous composite extrusion, and coiled on a gantry wire-winding machine to form a rough blank of about 1,286 kg of aluminum alloy / stainless steel layered composite strip profiles.

[0057] (5) Drawing, stripping and trimming: On a crawler or cam-type drawing machine, the rough layered composite strip profile is stripped and trimmed, and at the same time, the 6013 aluminum alloy material layer is drawn and deformed, and the deformation of the 6013 aluminum alloy is controlled to be 2.5%. Then, the stainless steel laminated strip is divided into two rolls of 587 kg and 579 kg from the overlapping surface.

[0058] (6) Artificial aging treatment: The rolled 6013 aluminum alloy / stainless steel layered composite strip profiles were artificially aged at 135°C for 8 hours (peak aging process). The head and tail samples were taken to measure the average hardness of the composite strip profile aluminum alloy cross section at three points, and the shear strength of the steel-aluminum composite strip profile joint surface was measured using the national standard. The results are shown in Table 2.

[0059] As a comparison, the present invention uses horizontal continuous casting to obtain a 6013 aluminum alloy disc round rod billet with a diameter of 10 mm, and continuously extrudes it into a 10×10 mm flat bar, which is then hot-rolled with a commercially available 2×10 mm annealed 316L stainless steel bar, with a rolling temperature of 350° C. and a reduction rate of 41.7%. The composited 6013 aluminum alloy / stainless steel layered composite strip profile is subjected to a solid solution quenching treatment at 540° C. for 1 hour, and then an artificial aging treatment (peak aging process) at 190° C. for 4 hours, and the average hardness of the three-point cross section of the composite strip profile is measured by sampling, and the shear strength of the joint surface of the steel-aluminum composite strip profile is measured using the national standard, and the results are shown in Table 2.

[0060] Table 2 Comparison of performance test results of the present invention and hot-rolled composite 6013 aluminum alloy / stainless steel layered composite strip profiles

[0061] Preparation method Joint surface shear strength MPa HV The present invention 98.6 131.5 Hot Rolling 75.1 127.8

[0062] It can be seen from Table 2 that the 6013 aluminum alloy / stainless steel layered composite strip profile coil prepared by the production method of the present invention has an average three-point hardness of 131.5Hv on the aluminum alloy cross section, and a shear strength of 98.6MPa on the steel-aluminum joint surface, which are both better than the 6013 aluminum alloy / stainless steel layered composite strip profile prepared by the hot rolling method, although both methods exceed the requirements of the technical agreement for the purchase of mobile phone frames by the associated company CNC processing. More importantly, the 6013 aluminum alloy / stainless steel layered composite strip profile prepared by the present invention does not need to be subjected to solution quenching treatment after compounding, which not only reduces the production process but also has a higher straightening rate during the straightening process of the composite strip profile, becoming a new production process method for 6013 aluminum alloy / stainless steel layered composite strip profile coils.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for producing aluminum alloy / metal layered composite strip profile coils, It is characterized in that include: S1. Two aluminum alloy disc round rod billets are synchronously fed into a modified tangential double-wheel single-groove continuous cladding extruder, and a metal laminated strip is introduced from a horizontal feed port of the tangential double-wheel single-groove continuous cladding extruder, and a horizontal tension is applied to the metal laminated strip to make it move horizontally in an extrusion die of the tangential double-wheel single-groove continuous cladding extruder, wherein the horizontal tension is 30-60% of the metal yield strength; the metal laminated strip is formed by laminating two metal strips together; before the metal laminated strip enters the tangential double-wheel single-groove continuous cladding extruder, its intended joint surface has been pre-roughened and pre-heated by electric induction; The two aluminum alloy disc round rod billets are 6013 aluminum alloy disc round rod billets prepared by rapid cooling horizontal continuous casting; The modified tangential double-wheel single-groove continuous coating extruder is to adjust the size and shape of the feed port and the extrusion die of the tangential double-wheel single-groove continuous coating extruder so that the feed port can be used to feed the metal laminated strip horizontally, and the cross-section of the extrusion die is adjusted according to the shape of the target product; The internal temperature of the extrusion die of the tangential double-wheel single-groove continuous cladding extruder is controlled to be 400-450° C.; a rough laminar composite strip profile is obtained by extruding the aluminum alloy disc round rod billet and the metal laminated strip; S2, performing online water rapid cooling and quenching treatment on the rough blank of the layered composite strip profile coming out of the tangential double-wheel single-groove continuous coating extruder; S3, performing a drawing, peeling and trimming process to obtain a layered composite strip profile, dividing the layered composite strip profile into two between the overlapping surfaces of the metal overlapping strips, and separating them into rolls; The drawing, peeling and trimming process includes drawing and deforming the aluminum alloy layer while peeling off the aluminum alloy flash on the side of the layered composite strip profile rough blank, and controlling the deformation of the aluminum alloy to be 1-5%; S4. Artificial aging treatment.

2. The production method according to claim 1, It is characterized in that In S1, before the metal laminated strip enters the tangential double-wheel single-groove continuous cladding extruder, the metal laminated strip is preheated to 380-450°C by electric induction.

3. The production method according to claim 1, It is characterized in that In S1, the thickness of a single metal strip in the metal laminated strip is 2-5 mm, and the width is 5-12 mm; in the rough blank of the layered composite strip profile obtained by extrusion, the thickness of the aluminum alloy is 3-8 mm, and the width is 5-12 mm.

4. The production method according to claim 1, It is characterized in that In S1, the temperature of the rough layered composite strip profile discharged from the tangential double-wheel single-groove continuous coating extruder is controlled to be 490-530°C.

5. The production method according to claim 1, It is characterized in that In S4, the artificial aging treatment conditions are: keeping the temperature at 120-155°C for 4-12 hours.

6. The production method according to claim 1, It is characterized in that In S1, the proposed joining surface of the metal overlapping strip is roughened by using an abrasive belt.

7. The production method according to any one of claims 1 to 6, It is characterized in that The metal overlapping strip is composed of two overlapping stainless steel strips.

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