KR101362328B1 - Cu/Al clad material with high strength and interfacial reliability through alloying, and the method for manufacturing the same - Google Patents

Abstract

The present invention relates to a clad material using a copper material and an aluminum material and a method of manufacturing the same that can improve electrical and mechanical reliability and interface reliability by changing microstructure and interface structure by alloying. The cladding material according to the present invention has a laminated structure in which a copper material and an aluminum material are sequentially laminated, and the copper material is formed from an alloy element group consisting of Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, and Co on a Cu base. One or more alloying elements selected, and the aluminum material comprises one or more alloying elements selected from the group of alloying elements consisting of Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, Co, Si on an Al substrate. It contains. Clad material according to the present invention compared to the conventional Cu / Al clad material by adding an alloying element to enhance the strength and suppress the reaction phase of copper and aluminum without significantly lowering the electrical conductivity to the copper material and / or aluminum material Excellent strength and electrical properties, improved interface reliability and durability.

Description

Cu / Al clad material with high strength and interfacial reliability through alloying, and the method for manufacturing the same}

The present invention relates to a copper / aluminum cladding material which has improved strength and interfacial reliability by alloying. It relates to a clad material with improved reliability and a method of manufacturing the same.

Clad material is a layered composite material developed for the purpose of improving mechanical, electrical and chemical properties as one of composite materials. Typical matrixes used in cladding materials include aluminum (Al), titanium (Ti), stainless steel (STS), carbon steel, and copper (Cu). Clad material is economical because it can obtain the properties of the material that can not be obtained from a single material by combining different metals, and can save expensive materials.

For example, titanium is a metal excellent in corrosion resistance and weather resistance, and also has good mechanical properties. In particular, it is used for various structural materials because it has a high specific strength value expressed as the ratio of specific gravity and strength of materials. However, due to the high price, it is not widely used. Steel, on the other hand, has lower specific strength than titanium, but is much cheaper and has excellent mechanical properties. The manufacture of cladding materials from these two materials maximizes their advantages and provides excellent corrosion resistance, mechanical properties and specific strength properties.

Cu / Al clad material manufactured by combining Cu and Al is a combination of high conductivity of Cu, light weight and economical efficiency of Al. It is applied to various fields such as materials for electric cables or bus bars in switchboards. It is becoming. Although Cu / Al cladding material has a lower electrical conductivity than copper only, it can reduce the weight to 50% or less and reduce the price by 35%. It is used as a substitute material.

 However, Cu / Al cladding material has a lower strength than Cu, which is not only a problem in drawing, but also inferior in mechanical reliability in use. In addition, low strength is insufficient to replace the high strength Cu alloy. In addition, since the conventional Cu / Al cladding material is made of pure copper and pure aluminum having a commercial purity containing insoluble impurities, it is applied to a product or a field requiring high strength and high conductivity properties due to its good electrical conductivity but low strength. This is impossible. In addition, due to the high chemical reaction characteristics of copper and aluminum, intermetallic compounds made of copper and aluminum, which are brittle, are formed at the interface when heated by resistance heat or used in high temperature environments, thereby reducing the reliability of electrical conductivity and mechanical properties and reducing the service life. Occurs.

The present invention has been devised in view of this point, and an object of the present invention is to add an alloy element capable of increasing the strength of pure copper and pure aluminum or suppressing an interfacial reaction phase, thereby lowering the strength of the conventional Cu / Al clad material. The present invention provides a cladding material using an alloyed copper material and an aluminum material and a method of manufacturing the same, which can solve the problem of deterioration of interfacial reliability.

Clad material according to an aspect of the present invention for achieving the above object, has a laminated structure in which a copper material and an aluminum material is sequentially laminated, the copper material is Cr, Zr, Ag, Mg, Mn, Ti, Nb on a Cu base At least one alloy element selected from the group of alloy elements consisting of Fe, Co, and the aluminum material is an alloy composed of Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, Co, Si on an Al base. It contains one or more alloying elements selected from the group of elements.

The content of the alloying element contained in the Cu base is 0.01 to 10wt% in the case of Ag, Nb, Fe, Cr, 0.01 to 5wt% in the case of Zr, Mg, Mn, Ti, Co, and is contained in the Al base The content of the alloy element is 0.01 to 10wt% for Ag, Nb, Fe, Cr, and 0.01 to 5wt% for Zr, Mg, Mn, Ti, Co, Si.

Clad material according to another aspect of the present invention for achieving the above object, has a laminated structure in which a copper material and an aluminum material is sequentially laminated, the copper material is Cr, Zr, Ag, Mg, Mn, Ti, Nb on a Cu base Containing at least one alloy element selected from the group of alloy elements consisting of Fe, Co, and the content of the alloy element contained in the Cu matrix is 0.01 to 10 wt% in the case of Ag, Nb, Fe, Cr, Zr, Mg, Mn, Ti, Co is 0.01 ~ 5wt%, the aluminum material is Al-0.01-5wt% Cu-0.01-5wt% Mg-based or Al-0.01-5wt% Mg-0.01-5wt% Si-based alloy It is characterized by.

Clad material according to another aspect of the present invention for achieving the above object, has a laminated structure in which a copper material and an aluminum material is sequentially laminated, any one of the copper material and the aluminum material is Cr, Zr, Ag, Mg, It contains at least one alloying element selected from the group of alloying elements consisting of Mn, Ti, Nb, Fe, and Co, and the other is made of a pure metal containing inevitable impurities.

Clad material according to the present invention may be made of a sandwich structure in which the copper material and the aluminum material is sequentially stacked.

Clad material according to the present invention may be made of a rod structure in which the copper material and the aluminum material are sequentially stacked concentrically.

Clad material manufacturing method according to the present invention for achieving the above object, (a) preparing a copper material, (b) preparing an aluminum material, (c) laminating the copper material and the aluminum-based material (D) bonding the laminated copper material and the aluminum material, wherein at least one of the copper material and the aluminum material is selected from the group consisting of Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, It is characterized by containing at least one alloy element selected from the group of alloy elements consisting of Co and Si.

The alloying element is contained in the copper material, the content of the alloying element contained in the copper material is 0.01 to 10wt% in the case of Ag, Nb, Fe, Cr, 0.01 in the case of Zr, Mg, Mn, Ti, Co ~ 5wt%, the aluminum material is Al-0.01-5wt% Cu-0.01-5wt% Mg-based or Al-0.01-5wt% Mg-0.01-5wt% Si-based alloy is preferred.

The method of manufacturing a cladding material according to the present invention includes the step of aging treatment of the laminate in which the copper material and the aluminum material are bonded at a temperature range of 50 ° C. to 600 ° C. after the step (d) in order to increase the strength and the conductivity characteristics. It may further comprise a step.

Method for producing a cladding material according to the present invention, before the step (c), the step of solution treatment of the copper material in the temperature range of 700 ℃ to 1060 ℃, 100 ℃ ~ 600 of the solution treated copper material Aging in a temperature range between < RTI ID = 0.0 > C, < / RTI > solving the aluminum material in a temperature range between 400 ° C and 650 ° C, and aging the solutionized aluminum material in a temperature range between 50 ° C and 400 ° C. It may further comprise the step of processing.

Method for producing a cladding material according to the present invention, before the step (c), the step of solution treatment of the copper material in the temperature range of 700 ℃ to 1060 ℃, the temperature of the aluminum material 400 ℃ ~ 650 ℃ The solution treatment step in the range, after the step (d), the copper material and the aluminum material may further comprise the step of aging treatment in the temperature range of 50 ℃ to 600 ℃ bonded laminate.

Clad material according to the present invention compared to the conventional Cu / Al clad material by adding an alloying element to enhance the strength and suppress the reaction phase of copper and aluminum without significantly lowering the electrical conductivity to the copper material and / or aluminum material Excellent strength and electrical properties, and improved interface reliability.

In addition, the cladding material according to the present invention is suppressed the formation of interfacial reactivity, the reaction phase appears much less than the conventional Cu / Al cladding material, thereby improving workability and service life compared to the conventional Cu / Al cladding material.

1 shows a cladding material according to the present invention having a sandwich structure.
Figure 2 shows a cladding material according to the present invention having a rod structure.
3 is a photograph showing a bonding surface of a Cu-Zr-Nb / Al-Zr-Nb cladding material according to an embodiment of the present invention.
4 is a photograph showing a bonding surface of a conventional Cu / Al cladding material.
5 is a strain-stress graph of the Cu-based alloy / Al-based alloy cladding material according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a clad material and a manufacturing method using a copper material and an aluminum material according to the present invention will be described in detail.

In describing the present invention, the sizes and shapes of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms are to be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the contents throughout the present specification.

 The present invention relates to a clad material in which a copper material and an aluminum material are sequentially stacked, and have the feature of overcoming the disadvantages of the conventional Cu / Al clad material made of pure copper and pure aluminum through the addition of alloying elements and heat treatment. That is, conventional Cu / Al cladding materials made of pure copper and pure aluminum have low strength, high chemical reaction characteristics of copper and aluminum, and are heated by resistance heat, or when used in a high temperature environment, brittle intermetallic compounds are formed at the interface. The electrical conductivity and mechanical properties can be lowered, the present invention is added to the copper material and / or aluminum material to increase the electrical conductivity and strength, and to contribute to the reaction phase suppression, and to perform heat treatment before and after their joining By doing so, excellent electrical conductivity and mechanical properties can be obtained.

The cladding material according to the present invention basically has a structure of Cu / Al in which a copper material and an aluminum material are sequentially laminated. The copper material may be a copper-based alloy containing at least one alloying element selected from the group of alloying elements consisting of Cr, Zr, Mn, Mg, Ag, Ti, Nb, and Co on a pure Cu base. The alloying elements contained in the copper material greatly increase the strength without significantly reducing the electrical conductivity, suppress the formation of Cu and Al compounds at the interface, thereby improving the interface reliability, and improve the workability and service life.

The content of the alloying element contained in the Cu base is 0.01 to 10 wt% for Ag, Nb, Fe, Cr, and 0.01 to 5 wt% for Zr, Mg, Mn, Ti, and Co. When the content of the alloying element contained in the Cu base is less than 0.01wt%, the effect of enhancing the strength and suppressing the interfacial reaction is small and the reliability of the mechanical properties is lowered. In addition, if the content of Ag, Nb, Fe, Cr in the Cu base exceeds 10wt% or the content of Zr, Mg, Mn, Ti, Co exceeds 5wt%, the reactants composed of electrical resistance and alloying elements are increased. This reduces the reliability of the electrical properties.

As the aluminum material, an aluminum-based alloy containing one or more alloying elements selected from the group of alloying elements consisting of Cr, Zr, Mn, Mg, Ag, Ti, Nb, and Co in pure Al base may be used. Like copper materials, alloying elements contained in aluminum materials significantly increase strength without significantly reducing electrical conductivity, inhibit compound formation between Cu and Al at the interface, and improve interfacial reliability, and improve workability and service life. Let it be.

The content of the alloying element contained in the Al base is 0.01 to 10 wt% for Ag, Nb, Fe, Cr, and 0.01 to 5 wt% for Zr, Mg, Mn, Ti, and Co. If the content of the alloying element contained in the Al base is less than 0.01wt%, the effect of enhancing the strength and suppressing the interfacial reaction is small and the reliability of the mechanical properties is lowered. In addition, if the content of Ag, Nb, Fe, Cr in the Al base exceeds 10wt%, or the content of Zr, Mg, Mn, Ti, Co exceeds 5wt%, the reactants composed of electrical resistance and alloying elements are increased. This reduces the reliability of the electrical properties.

The clad material according to the present invention may be a copper-based alloy or an aluminum-based alloy containing both the above-described alloying elements of the copper material and the aluminum material, and only one of the copper material and the aluminum material contains the alloying element and the other is It may be a pure metal containing unavoidable impurities. That is, when a copper-based alloy containing at least one alloy element selected from the group of alloy elements consisting of Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, Co is used as the copper material, Aluminum can be used. When an aluminum-based alloy containing at least one alloy element selected from the group of alloy elements consisting of Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, and Co is used as the aluminum material, the copper material is pure Copper may be used.

When a copper-based alloy containing an alloying element is used as the copper material, Al-0.01 to 5wt% Cu-0.01 to 5wt% Mg type or Al-0.01 to 5wt% Mg-0.01 ~ which is relatively excellent in electrical conductivity as an aluminum material 5 wt% Si-based alloys may be used. In this case, the content of the alloying elements contained in the copper material is 0.01 to 10 wt% for Ag, Nb, Fe, Cr, and 0.01 to 5 wt% for Zr, Mg, Mn, Ti, and Co.

The cladding material according to the present invention may be made of a sandwich structure in which a flat copper material and a flat aluminum material are sequentially stacked, or may be made of a rod structure in which copper materials and aluminum materials, which are made of rods having different diameters, are sequentially stacked concentrically.

1 shows an example of a cladding material having a sandwich structure, and the cladding material shown in FIG. 1 has a two-layer structure of Cu / Al in which one copper alloy 10 and one aluminum alloy 20 are sequentially stacked. Have Of course, the cladding material according to the present invention may have various forms such as a three-layer structure of Cu / Al / Cu or Al / Cu / Al, or a five-layer structure of Al / Cu / Al / Cu / Al or Cu / Al / Cu / Al / Cu. It can be extended to a sandwich structure.

2 shows an example of a cladding material having a rod structure, and the cladding material shown in FIG. 2 has a double rod structure in which a rod-shaped copper alloy 10 is surrounded by a rod-shaped aluminum alloy 20 having a larger diameter. . Of course, the cladding material according to the present invention includes a plurality of copper materials and a plurality of aluminum materials, such as a double rod structure in which a rod-type aluminum alloy is wrapped in a rod-type copper alloy, and a triple rod structure of Cu / Al / Cu or Al / Cu / Al. The material can be extended to multiple rod-like structures that are sequentially stacked concentrically.

Hereinafter, the manufacturing method of the cladding material by this invention is demonstrated.

First, a copper material and an aluminum material are prepared. Herein, at least one of the copper material and the aluminum material is an alloy capable of increasing the strength of Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, Co and the like, and suppressing the compound formation between Cu and Al, as described above. It is a copper alloy or aluminum alloy containing 1 or more types of elements. When manufacturing the clad material of the sandwich structure, the copper material and the aluminum material is prepared in the form of a square, such as a plate-shaped cross-section, and in the case of manufacturing the clad material of the rod structure, the copper material and aluminum material is prepared to be rod or cylindrical.

In the case where the copper material is a copper alloy containing an alloying element, the copper material can be cooled after the solution is subjected to a solution treatment before, after, or during processing. The solution treatment is a heat treatment method in which all secondary phase particles having a uniform and uniform distribution in a material are dissolved in a matrix. The solution treatment of a copper alloy is performed at a temperature range of 700 ° C to 10600 ° C. And the solution-ized copper alloy is aged at a temperature of 100 ℃ ~ 600 ℃. The remaining alloying elements except the Cu base through the solution treatment may be dissolved in the Cu base and then precipitated by the aging treatment performed after the solution treatment, thereby improving the mechanical properties of the copper-based alloy.

If the temperature is less than 700 ℃ during the solution treatment of the copper alloy, the secondary phase particles may not be all dissolved, so the effect of solution treatment may be greatly reduced. If the solution treatment temperature exceeds 1060 ℃, some segregated parts It is not preferable because it may be melted.

If the aging treatment temperature is less than 100 ℃, the alloying element dissolved in the Cu base is not precipitated or the precipitation rate is slow. The aging treatment effect is not shown. If the aging treatment temperature exceeds 600 ℃, the alloying element dissolved in the Cu base precipitates. In the process of aging, the aging reinforcement effect due to coarsening of precipitation does not appear.

On the other hand, when the aluminum material is an aluminum alloy containing an alloying element, the aluminum material can be cooled after the solution is subjected to solution treatment before, after the processing, or during the processing. The solution treatment of the aluminum-based alloy is carried out in a temperature range between 400 ° C and 650 ° C. And the solution-ized aluminum alloy is aged at a temperature of 50 ℃ to 400 ℃. The remaining alloying elements except Al base through the solution treatment may be dissolved in Al base and then precipitated by aging after the solution treatment, thereby improving mechanical properties of the aluminum alloy.

If the temperature is less than 400 ℃ during the solution treatment of the aluminum alloy, the secondary phase particles are not all dissolved, so the effect of solution treatment may be greatly degraded, and if the solution treatment temperature exceeds 650 ℃, some segregated parts It is not preferable because it may be melted.

If the aging treatment temperature is less than 50 ℃, the alloying element dissolved in the Al base is not precipitated or the precipitation rate is slow. The aging treatment effect is not shown. If the aging treatment temperature exceeds 400 ℃, the alloying element dissolved in the Al base is precipitated. In the process of aging, the aging reinforcement effect due to coarsening of precipitation does not appear.

The aging treatment for the copper-based alloy or the aluminum-based alloy is not performed in the alloy preparation step as described above, but may be performed after the copper material and the aluminum material are sequentially laminated. That is, after laminating a copper material and an aluminum material in sequence, the laminate may be aged in a temperature range of 50 ° C. to 600 ° C. to improve the mechanical properties of the copper alloy or the aluminum alloy.

Subsequently, after laminating | stacking a copper raw material and an aluminum raw material, this laminated body is joined. As a method of bonding a laminate of a copper material and an aluminum material, various known methods may be used. That is, the laminate may be joined by resistance core welding, rolling welding, extrusion bonding, drawing welding, explosion bonding, laser welding, high pressure torsioning (HPT), friction welding, diffusion bonding, or the like.

In the case of using the resistance seam welding method, a large current is allowed to flow while the laminate is pressurized. At this time, heat is generated by the contact resistance generated at the contact surface between the copper material and the aluminum material and the resistivity of each of the copper material and the aluminum material, and the bonding is performed by the pressure applied while the copper material and the aluminum material are melted due to the generated heat.

In the case of using a rolled joining method or an extrusion joint, a sheet or rod is formed by passing a high temperature or room temperature copper material and an aluminum material between two rotating rolls or through an extrusion die by using metal firing. It can be processed into various forms with pipes, molds, etc.

In the case of using an explosion bonding method, a copper material and an aluminum material are joined using a small amount of gunpowder. Explosion bonding is used for welding of different materials, high melting point materials, clad welding, and multi-layer welding. Alloys produced by explosive bonding show a mechanically strong joint surface, are hardly affected by heat in the vicinity of the joint surface, and do not degrade the strength of the base metal even in heat-treated or hardened materials.

In the case of using the laser welding method, the laser beam is focused to increase energy density, thereby welding while melting the copper material and the aluminum material. Laser welding is a bonding method that has a high density of energy and has little heat effect on the material, so that there is little deformation and precise welding is possible.

In the case of using the high pressure torsion bonding method, the copper material and the aluminum material are rotated with high pressure, thereby joining the copper material and the aluminum material with high plasticity and pressure. The high-pressure torsion bonding method can increase the strength of the bonded body to be joined due to high plastic working, and can be bonded even at room temperature.

In the case of using friction welding, relative rotation is given to each other under pressure on the joint surface of the copper material and the aluminum material. At this time, when the joining portion is brought to a suitable high temperature by frictional heating, the pressing force is increased to join the copper material and the aluminum material.

In the case of using the diffusion welding method, the laminate is heat-treated under pressure to bond the copper material and the aluminum material by diffusion. In the diffusion bonding method, the workpieces are pressed against each other like friction welding, fixed by applying pressure, and heated at a temperature of 0.3 Tm (Tm: melting temperature) at the melting point, the time varying from 5 minutes to 24 hours, It is easy to weld small parts without deforming the joints.

When bonding the laminate of copper material and aluminum material, the alloying elements contained in the copper material and / or aluminum material control the reaction between Cu and Al at the interface to reduce the formation of intermetallic compounds composed of Cu and Al, The characteristics of interfacial reliability and high temperature reliability can be imparted.

Example: Preparation of Copper / Aluminium Clad Material with Improved Strength and Interfacial Reliability

Copper / aluminum clad materials of various structures and compositions were prepared as shown in Table 1 below. The Cu and Al alloys each had a thickness of 6 mm, and the Cu alloy was annealed at 950 ° C. and aged at 400 ° C., and the Al alloy was melted at 500 ° C. and then at 250 ° C. Aging treatment was performed, and each alloy was joined by a roll bonding method.

Table 1 shows the characteristics of 'electric conductivity', 'strength', '(conductivity x strength) / specific gravity' of clad materials of various structures and compositions prepared by the above process.

Comparative Example

A clad material manufactured using pure Cu and Al except for unavoidable impurities was selected as a comparative example. The cladding material was manufactured according to the same process as in the above example, and the characteristics of 'electric conductivity', 'strength', and '(conductivity x strength) / weight' of the prepared cladding agent are shown in Table 1.

(IACS (International Annealed Copper Standard) is a "standard of international annealed copper" and is a unit of electrical conductivity expressed as 100% IACS of pure copper at 20 ° C. Strength is ASTM E8-00, specific gravity is ASTM Based on D792)

As can be seen from the results of Table 1, the cladding material according to the embodiment of the present invention has a higher electrical conductivity and higher strength than the conventional cladding material, and in particular, the characteristic of (conductivity x strength) / specific gravity is conventional cladding. It was confirmed that it is much better than ash.

In addition, in the cladding material according to the embodiment of the present invention, formation of interfacial reactivity at the interface between the copper material and the aluminum material is suppressed as compared with the conventional cladding material. Figure 3 is a photograph showing the bonding surface of the Cu-Zr-Nb / Al-Zr-Nb cladding material according to Example 8 of the present invention, Figure 4 is a photograph showing the bonding surface of the conventional Cu / Al cladding material according to a comparative example. . Comparing these photographs, it can be seen that the Cu-based alloy / Al-based alloy cladding material according to the embodiment of the present invention exhibits much less reaction phase because the formation of interfacial reactivity is suppressed than that of the conventional Cu / Al cladding material.

In addition, the clad material according to the embodiment of the present invention, as shown in the graph shown in Figure 5, it can be confirmed that the mechanical and electrical properties are superior to the conventional clad material, and thus can be expected to improve the service life compared to the conventional.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters disclosed in the claims, and those skilled in the art can improve and change the technical idea of the present invention in various forms. Accordingly, these modifications and variations are intended to fall within the scope of the present invention as long as it is obvious to those skilled in the art.

10: copper alloy 20: aluminum alloy

Claims (11)

It has a laminated structure in which a copper material and an aluminum material are sequentially stacked.
The copper material contains at least one alloy element selected from the group of alloy elements consisting of Cr, Zr, Mg, Mn, and Co in a Cu base,
The aluminum material contains at least one alloy element selected from the group of alloy elements consisting of Cr, Zr, Mn, and Co in an Al base,
The content of the alloying element contained in the Cu base is 0.01 to 10 wt% in the case of Cr, 0.01 to 5 wt% in the case of Zr, Mg, Mn, and Co,
The content of the alloy element contained in the Al base is 0.01 ~ 10wt% in the case of Cr, clad material, characterized in that 0.01 ~ 5wt% in the case of Zr, Mn, Co.
delete delete delete The method of claim 1,
Clad material, characterized in that consisting of a sandwich structure in which the copper material and the aluminum material are sequentially laminated.
The method of claim 1,
Clad material, characterized in that the copper material and the aluminum material has a rod structure stacked in sequence in a concentric manner.
(a) Cu base contains at least one alloying element selected from the group of alloying elements consisting of Cr, Zr, Mg, Mn, and Co, and the content of the alloying element contained in the Cu base is 0.01 to 10 wt. %, Zr, Mg, Mn, Co for preparing a copper material of 0.01 ~ 5wt%;
(b) Al base contains at least one alloying element selected from the group of alloys consisting of Cr, Zr, Mn, Co, and the content of the alloying element contained in the Al base is 0.01 to 10 wt% when Cr; In case of Zr, Mn, Co, preparing an aluminum material of 0.01 to 5wt%;
(c) laminating the copper material and the aluminum material; And
(d) bonding the laminated copper material and the aluminum material; a method of manufacturing a clad material, comprising: a.
delete The method of claim 7, wherein
After the step (d) in order to increase the strength and electrical conductivity characteristics, further comprising the step of aging the laminate bonded to the copper material and the aluminum material in a temperature range of 50 ℃ to 600 ℃ Method of manufacturing clad material.
The method of claim 7, wherein
Before step (c), the step of solution treatment of the copper material in the temperature range of 700 ℃ to 1060 ℃;
Ageing the solution-treated copper material in a temperature range between 100 ° C. and 600 ° C .;
Solution treatment of the aluminum material in a temperature range between 400 ° C. and 650 ° C .; And
Aging the solution-treated aluminum material in a temperature range of 50 ℃ to 400 ℃; manufacturing method of the cladding material further comprises.
The method of claim 7, wherein
Before step (c), the step of solution treatment of the copper material in the temperature range of 700 ℃ to 1060 ℃;
Solution treatment of the aluminum material in a temperature range between 400 ° C. and 650 ° C .; And
After the step (d), the step of aging treatment of the laminate in which the copper material and the aluminum material is bonded at a temperature range of 50 ℃ to 600 ℃; manufacturing method of a cladding material further comprising.

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