COPPER-ALUMINUM COMPOSITE PLATE MATERIAL PREPARED BY ALUMINUM LIQUID CONTINUOUS CASTING AND PROCESS THEREOF

Abstract

A copper-aluminum composite plate material prepared by aluminum liquid continuous casting and a process thereof. The method includes: S1, heating an aluminum ingot to 700-800 C. and smelting for 1-3 h; S2, degassing smelted aluminum liquid, and keeping the temperature and standing; S3, texturing a copper strip, and then cleaning; S4, heating the pretreated copper strip to 200-650 C.; S5, under the protection of inert gas, continuously casting the treated aluminum liquid on the treated copper strip, performing quenching crystallization on a copper-aluminum composite material, and performing oxygen-free continuous casting; and S6, continuous rolling: rolling the continuously cast copper-aluminum composite material to obtain the copper-aluminum composite plate material prepared by aluminum liquid continuous casting.

Claims

1. A process of a copper-aluminum composite plate material prepared by aluminum liquid continuous casting, comprising the following steps: S1, smelting: heating an aluminum ingot to 700-800 C. and smelting for 1-3 h; S2, standing: degassing aluminum liquid smelted in step S1, and keeping a temperature and standing for 10-30 min; adding Cu@Si@Al Janus nanosheets in an amount of 5-7 wt % of the aluminum liquid before degassing treatment, wherein a preparation method of the Cu@Si@Al Janus nanosheets is as follows: T1, preparation of SiO.sub.2 hollow nanospheres: dissolving ethyl orthosilicate in an organic solvent to prepare an oil phase; dissolving an emulsifier in water to prepare a water phase; dropwise adding the water phase into the oil phase, emulsifying, adjusting a pH value of a solution to 10-11, performing heating and stirring reaction, centrifuging, washing, drying and calcining to prepare SiO.sub.2 hollow nanospheres; T2, ball milling: performing ball milling on the SiO.sub.2 hollow nanospheres prepared in step T1 to prepare SiO.sub.2 nanosheets; T3, modification: adding the SiO.sub.2 nanosheets prepared in step T2 into ethanol, adding a silane coupling agent, performing heating and stirring reaction, centrifuging, washing and drying to prepare modified SiO.sub.2 nanosheets; T4, preparation of CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets: dissolving aluminum isopropoxide in dichloromethane, standing, adding the modified SiO.sub.2 nanosheets prepared in step T3, which float on a interface, dropwise adding an aqueous solution containing a copper salt, then adding citric acid, performing standing reaction, centrifuging, washing, drying and calcining to prepare CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets; and T5, reduction: mixing the CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets prepared in step T4 with magnesium powder, performing heating reduction reaction, and then performing hydrogen reduction reaction to prepare the Cu@Si@Al Janus nanosheets; S3, copper strip pretreatment: texturing a copper strip, and then cleaning; S4, copper strip heating: heating the pretreated copper strip obtained in step S3 to 200-650 C.; S5, continuous casting: under protection of inert gas, continuously casting the aluminum liquid treated in step S2 on the copper strip treated in step S4, performing quenching crystallization on a copper-aluminum composite material, and performing oxygen-free continuous casting; and S6, continuous rolling: rolling the copper-aluminum composite material continuously cast in step S5 to obtain the copper-aluminum composite plate material prepared by aluminum liquid continuous casting.

2. The process according to claim 1, wherein the texturing in step S3 comprises mechanical texturing, chemical texturing or laser texturing, the mechanical texturing is texturing with a steel brush or an abrasive belt, and the cleaning is ultrasonic cleaning or laser cleaning.

3. The process according to claim 1, wherein in step S5, a casting speed is 200-1200 mm/min; a casting width is 10-100 mm; a casting thickness is 3-20 mm, a cooling rate of the quenching crystallization is 100-150 C./min.

4. The process according to claim 1, wherein in step S6, a thickness of the copper-aluminum composite plate material prepared by continuously_casting the aluminum liquid is 2-12 mm, a rolling pressure is 5000-5000000 N, a rolling speed is 300-1500 mm/min, and a rolling tension is 10000-200000 N.

5. The process according to claim 1, wherein in step T1, a mass ratio of the ethyl orthosilicate, organic solvent, emulsifier and water is 12-15:100:0.5-1:30-50, the emulsifier is selected from at least one of Tween-20, Tween-40, Tween-60 and Tween-80, a temperature of the heating and stirring reaction is 50-60 C. for 10-12 h, and a temperature of the calcining is 300-500 C. for 1-3 h; time of the ball milling in step T2 is 2-4 h; and in step T3, a mass ratio of the SiO.sub.2 nanosheets to the silane coupling agent is 100:22-25, the silane coupling agent is a silane coupling agent with amino groups and is selected from at least one of KH550, KH602 and KH792, and a temperature of the heating and stirring reaction is 40-50 C. for 0.5-1 h.

6. The process according to claim 1, wherein in step T4, a mass ratio of the modified SiO.sub.2 nanosheets, aluminum isopropoxide, copper salt and citric acid is 50:12-15:7-12:3-5, time of the standing reaction is 30-50 min, a temperature of the calcining is 500-700 C. for 1-3 h, and the copper salt is selected from at least one of copper chloride, copper sulfate and copper nitrate; and in step T5, a mass ratio of the CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets to the magnesium powder is 100:7-12, a temperature of the heating reduction reaction is 700-800 C. for 0.5-1 h, a temperature of the hydrogen reduction reaction is 600-800 C. for 1-2 h, and a ventilation rate of hydrogen is 20-30 mL/min.

7. The process according to claim 1, wherein after the cleaning in step S3, a surface is coated with a layer of ethylene glycol dimethyl ether solution of 11-mercapto undecanoic acid with a concentration of 7-12 wt %.

8. (canceled)

9. (canceled)

Description

DETAILED DESCRIPTION

[0035] The technical solution in the embodiments of the present invention will be described clearly and completely below. Apparently, the described embodiments are only part but not all of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present invention.

Preparation Embodiment 1: Preparation of Cu@Si@Al Janus Nanosheets

[0036] The method is as follows: [0037] T1, preparation of SiO.sub.2 hollow nanospheres: dissolving 12 parts by weight of ethyl orthosilicate in 100 parts by weight of dichloromethane to prepare an oil phase; dissolving 0.5 part by weight of Tween-20 in 30 parts by weight of water to prepare a water phase; dropwise adding the water phase into the oil phase, emulsifying at 10000 r/min for 15 min, adjusting a pH value of the solution to 10, heating to 50 C., stirring for reaction for 10 h, centrifuging, washing, drying, and calcining at 300 C. for 1 h to prepare SiO.sub.2 hollow nanospheres; [0038] T2, ball milling: performing ball milling on the SiO.sub.2 hollow nanospheres prepared in step TI for 2 h to prepare SiO.sub.2 nanosheets; [0039] T3, modification: adding 100 parts by weight of the SiO.sub.2 nanosheets prepared in step T2 into 200 parts by weight of ethanol, adding 22 parts by weight of silane coupling agent KH550, heating to 40 C., stirring for reaction for 0.5 h, centrifuging, washing and drying to prepare modified SiO.sub.2 nanosheets; [0040] T4, preparation of CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets: dissolving 12 parts by weight of aluminum isopropoxide in 100 parts by weight of dichloromethane, standing, adding 50 parts by weight of the modified SiO.sub.2 nanosheets prepared in step T3, which float on the interface, dropwise adding 100 parts by weight of aqueous solution containing 7 parts by weight of copper chloride, then adding 3 parts by weight of citric acid, standing for reaction for 30 min, centrifuging, washing, drying, and calcining at 500 C. for 1 h to prepare CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets; and [0041] T5, reduction: mixing 100 parts by weight of the CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets prepared in step T4 with 7 parts by weight of magnesium powder, heating to 700 C., performing reduction reaction for 0.5 h, and then performing hydrogen reduction reaction at 600 C. for 1 h, with a ventilation rate of hydrogen being 20 mL/min to prepare Cu@Si@Al Janus nanosheets.

Preparation Embodiment 2: Preparation of Cu@Si@Al Janus Nanosheets

[0042] The method is as follows: [0043] T1, preparation of SiO.sub.2 hollow nanospheres: dissolving 15 parts by weight of ethyl orthosilicate in 100 parts by weight of dichloromethane to prepare an oil phase; dissolving 1 part by weight of Tween-40 in 50 parts by weight of water to prepare a water phase; dropwise adding the water phase into the oil phase, emulsifying at 10000 r/min for 15 min, adjusting a pH value of the solution to 11, heating to 60 C., stirring for reaction for 12 h, centrifuging, washing, drying and calcining at 500 C. for 3 h to prepare SiO.sub.2 hollow nanospheres; [0044] T2, ball milling: performing ball milling on the SiO.sub.2 hollow nanospheres prepared in step T1 for 4 h to prepare SiO.sub.2 nanosheets; [0045] T3, modification: adding 100 parts by weight of the SiO.sub.2 nanosheets prepared in step T2 into 200 parts by weight of ethanol, adding 25 parts by weight of silane coupling agent KH602, heating to 50 C., stirring for reaction for 1 h, centrifuging, washing and drying to prepare modified SiO.sub.2 nanosheets; [0046] T4, preparation of CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets: dissolving 15 parts by weight of aluminum isopropoxide in 100 parts by weight of dichloromethane, standing, adding 50 parts by weight of the modified SiO.sub.2 nanosheets prepared in step T3, which float on the interface, dropwise adding 100 parts by weight of aqueous solution containing 12 parts by weight of copper sulfate, then adding 5 parts by weight of citric acid, standing for reaction for 50 min, centrifuging, washing, drying, and calcining at 700 C. for 3 h to prepare CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets; and [0047] T5, reduction: mixing 100 parts by weight of the CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets prepared in step T4 with 12 parts by weight of magnesium powder, heating to 800 C., performing reduction reaction for 1 h, and then performing hydrogen reduction reaction at 800 C. for 2 h, with a ventilation rate of hydrogen being 30 mL/min to prepare Cu@Si@Al Janus nanosheets.

Preparation Embodiment 3: Preparation of Cu@Si@Al Janus Nanosheets

[0048] The method is as follows: [0049] T1, preparation of SiO.sub.2 hollow nanospheres: dissolving 13 parts by weight of ethyl orthosilicate in 100 parts by weight of dichloromethane to prepare an oil phase; dissolving 0.7 part by weight of Tween-80 in 40 parts by weight of water to prepare a water phase; dropwise adding the water phase into the oil phase, emulsifying at 10000 r/min for 15 min, adjusting a pH value of the solution to 10.5, heating to 55 C., stirring for reaction for 11 h, centrifuging, washing, drying, and calcining at 400 C. for 2 h to prepare SiO.sub.2 hollow nanospheres; [0050] T2, ball milling: performing ball milling on the SiO.sub.2 hollow nanospheres prepared in step T1 for 3 h to prepare SiO.sub.2 nanosheets; [0051] T3, modification: adding 100 parts by weight of the SiO.sub.2 nanosheets prepared in step T2 into 200 parts by weight of ethanol, adding 23 parts by weight of silane coupling agent, heating to 45 C., stirring for reaction for 1 h, centrifuging, washing and drying to prepare modified SiO.sub.2 nanosheets; [0052] T4, preparation of CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets: dissolving 13 parts by weight of aluminum isopropoxide in 100 parts by weight of dichloromethane, standing, adding 50 parts by weight of the modified SiO.sub.2 nanosheets prepared in step T3, which float on the interface, dropwise adding 100 parts by weight of aqueous solution containing 10 parts by weight of copper nitrate, then adding 4 parts by weight of citric acid, standing for reaction for 40 min, centrifuging, washing, drying and calcining at 600 C. for 2 h to prepare CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets; [0053] T5, reduction: mixing 100 parts by weight of the CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets prepared in step T4 with 10 parts by weight of magnesium powder, heating to 750 C., performing reduction reaction for 1 h, and then performing hydrogen reduction reaction at 700 C. for 1.5 h, with a ventilation rate of hydrogen being 25 mL/min to prepare Cu@Si@Al Janus nanosheets.

Comparative Preparation Embodiment 1

[0054] Compared with Preparation Example 3, the difference is that step T3 is not performed.

[0055] The method is as follows: [0056] T1, preparation of SiO.sub.2 hollow nanospheres: dissolving 13 parts by weight of ethyl orthosilicate in 100 parts by weight of dichloromethane to prepare an oil phase; dissolving 0.7 part by weight of Tween-80 in 40 parts by weight of water to prepare a water phase; dropwise adding the water phase into the oil phase, emulsifying at 10000 r/min for 15 min, adjusting a pH value of the solution to 10.5, heating to 55 C., stirring for reaction for 11 h, centrifuging, washing, drying, and calcining at 400 C. for 2 h to prepare SiO.sub.2 hollow nanospheres; [0057] T2, ball milling: performing ball milling on the SiO.sub.2 hollow nanospheres prepared in step T1 for 3 h to prepare SiO.sub.2 nanosheets; [0058] T3, preparation of CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets: dissolving 13 parts by weight of aluminum isopropoxide in 100 parts by weight of dichloromethane, standing, adding 50 parts by weight of the SiO.sub.2 nanosheets prepared in step T2, which float on the interface, dropwise adding 100 parts by weight of aqueous solution containing 10 parts by weight of copper nitrate, then adding 4 parts by weight of citric acid, standing for reaction for 40 min, centrifuging, washing, drying and calcining at 600 C. for 2 h to prepare CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets; and [0059] T4, reduction: mixing 100 parts by weight of the CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets prepared in step T3 with 10 parts by weight of magnesium powder, heating to 750 C., performing reduction reaction for 1 h, and then performing hydrogen reduction reaction at 700 C. for 1.5 h, with a ventilation rate of hydrogen being 25 mL/min to prepare Cu@Si@Al Janus nanosheets.

Comparative Preparation Embodiment 2

[0060] Compared with Preparation Example 3, the difference is that step T5 is not performed.

[0061] The method is as follows: [0062] T1, preparation of SiO.sub.2 hollow nanospheres: dissolving 13 parts by weight of ethyl orthosilicate in 100 parts by weight of dichloromethane to prepare an oil phase; dissolving 0.7 part by weight of Tween-80 in 40 parts by weight of water to prepare a water phase; dropwise adding the water phase into the oil phase, emulsifying at 10000 r/min for 15 min, adjusting a pH value of the solution to 10.5, heating to 55 C., stirring for reaction for 11 h, centrifuging, washing, drying, and calcining at 400 C. for 2 h to prepare SiO.sub.2 hollow nanospheres; [0063] T2, ball milling: performing ball milling on the SiO.sub.2 hollow nanospheres prepared in step T1 for 3 h to prepare SiO.sub.2 nanosheets; [0064] T3, modification: adding 100 parts by weight of the SiO.sub.2 nanosheets prepared in step T2 into 200 parts by weight of ethanol, adding 23 parts by weight of silane coupling agent, heating to 45 C., stirring for reaction for 1 h, centrifuging, washing and drying to prepare modified SiO.sub.2 nanosheets; [0065] T4, preparation of CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets: dissolving 13 parts by weight of aluminum isopropoxide in 100 parts by weight of dichloromethane, standing, adding 50 parts by weight of the modified SiO.sub.2 nanosheets prepared in step T3, which float on the interface, dropwise adding 100 parts by weight of aqueous solution containing 10 parts by weight of copper nitrate, then adding 4 parts by weight of citric acid, standing for reaction for 40 min, centrifuging, washing, drying and calcining at 600 C. for 2 h to prepare CuO@SiO.sub.2@Al.sub.2O.sub.3 nanosheets.

Embodiment 1

[0066] The present embodiment provides a process of a copper-aluminum composite plate material prepared by aluminum liquid continuous casting, which includes the following steps: [0067] S1, smelting: heating an industrial LF21 pure aluminum ingot to 750 C. and smelting for 2 h; [0068] S2, standing: degassing the aluminum liquid smelted in step S1, and keeping the temperature and standing for 20 min; [0069] S3, copper strip pretreatment: treating a red copper T2 copper strip of 2 mm thick with steel brush hair, and then performing ultrasonic cleaning for 10 min; [0070] S4, copper strip heating: heating the pretreated copper strip obtained in step S3 to 350 C.; [0071] S5, continuous casting: under the protection of nitrogen, enabling the copper strip treated in step S4 to continuously pass through a continuous casting device and a crystallizer, continuously casting the aluminum liquid treated in step S2 on the copper strip through a casting system, performing quenching crystallization on a copper-aluminum composite material by the crystallizer and performing oxygen-free continuous casting; [0072] wherein a casting speed is 1000 mm/min; a casting width is 50 mm; a casting thickness is 10 mm, and a cooling rate of the quenching crystallization is 120 C./min; and [0073] S6, continuous rolling: rolling the copper-aluminum composite material continuously cast in step S5 to prepare a copper-aluminum composite plate material prepared by aluminum liquid continuous casting; [0074] wherein a thickness of the copper-aluminum composite plate material prepared by liquid aluminum continuous casting is 7 mm, a rolling pressure is 1000000 N, a rolling speed is 1000 mm/min, and a rolling tension is 100000 N.

Embodiment 2

[0075] The present embodiment provides a process of a copper-aluminum composite plate material prepared by aluminum liquid continuous casting, which includes the following steps: [0076] S1, smelting: heating an industrial LF21 pure aluminum ingot to 750 C. and smelting for 2 h; [0077] S2, standing: adding the Cu@Si@Al Janus nanosheets prepared in Preparation Example 1 into the aluminum liquid smelted in step S1, wherein an addition amount is 6 wt % of the aluminum liquid, stirring and mixing for 30 min, degassing, and keeping the temperature and standing for 20 min; [0078] S3, copper strip pretreatment: treating a red copper T2 copper strip of 2 mm thick with steel brush hair, and then performing ultrasonic cleaning for 10 min; [0079] S4, copper strip heating: heating the pretreated copper strip obtained in step S3 to 300 C.; [0080] S5, continuous casting: under the protection of nitrogen, enabling the copper strip treated in step S4 to continuously pass through a continuous casting device and a crystallizer, continuously casting the aluminum liquid treated in step S2 on the copper strip through a casting system, performing quenching crystallization on a copper-aluminum composite material by the crystallizer and performing oxygen-free continuous casting; [0081] wherein a casting speed is 1000 mm/min; a casting width is 50 mm; a casting thickness is 10 mm, and a cooling rate of the quenching crystallization is 120 C./min; and [0082] S6, continuous rolling: rolling the copper-aluminum composite material continuously cast in step S5 to prepare a copper-aluminum composite plate material prepared by liquid aluminum continuous casting; [0083] wherein a thickness of the copper-aluminum composite plate material prepared by liquid aluminum continuous casting is 7 mm, a rolling pressure is 1000000 N, a rolling speed is 1000 mm/min, and a rolling tension is 100000 N.

Embodiment 3

[0084] The present embodiment provides a process of a copper-aluminum composite plate material prepared by aluminum liquid continuous casting, which includes the following steps: [0085] S1, smelting: heating an industrial LF21 pure aluminum ingot to 700 C. and smelting for 1 h; [0086] S2, standing: adding the Cu@Si@Al Janus nanosheets prepared in Preparation Example 1 into the aluminum liquid smelted in step S1, wherein an addition amount is 5 wt % of the aluminum liquid, stirring and mixing for 30 min, degassing, and keeping the temperature and standing for 10 min; [0087] S3, copper strip pretreatment: treating a red copper T2 copper strip of 2 mm thick with steel brush hair, and then performing ultrasonic cleaning for 10 min, wherein the surface is coated with a layer of ethylene glycol dimethyl ether solution of 11-mercapto undecanoic acid with a concentration of 7 wt %; [0088] S4, copper strip heating: heating the pretreated copper strip obtained in step S3 to 350 C.; [0089] S5, continuous casting: under the protection of nitrogen, enabling the copper strip treated in step S4 to continuously pass through a continuous casting device and a crystallizer, continuously casting the aluminum liquid treated in step S2 on the copper strip through a casting system, performing quenching crystallization on a copper-aluminum composite material by the crystallizer and performing oxygen-free continuous casting; [0090] wherein a casting speed is 1000 mm/min; a casting width is 50 mm; a casting thickness is 10 mm, and a cooling rate of the quenching crystallization is 100 C./min; and [0091] S6, continuous rolling: rolling the copper-aluminum composite material continuously cast in step S5 to prepare a copper-aluminum composite plate material prepared by liquid aluminum continuous casting; [0092] wherein a thickness of the copper-aluminum composite plate material prepared by liquid aluminum continuous casting is 7 mm, a rolling pressure is 1000000 N, a rolling speed is 1000 mm/min, and a rolling tension is 100000 N.

Embodiment 4

[0093] The present embodiment provides a process of a copper-aluminum composite plate material prepared by aluminum liquid continuous casting, which includes the following steps: [0094] S1, smelting: heating an aluminum ingot to 800 C. and smelting for 3 h; [0095] S2, standing: adding the Cu@Si@Al Janus nanosheets prepared in Preparation Example 2 into the aluminum liquid smelted in step S1, wherein an addition amount is 7 wt % of the aluminum liquid, stirring and mixing for 30 min, degassing, and keeping the temperature and standing for 30 min; [0096] S3, copper strip pretreatment: treating a red copper T2 copper strip of 2 mm thick with steel brush hair, and then performing ultrasonic cleaning for 10 min, wherein the surface is coated with a layer of ethylene glycol dimethyl ether solution of 11-mercapto undecanoic acid with a concentration of 12 wt %; [0097] S4, copper strip heating: heating the pretreated copper strip obtained in step S3 to 350 C.; [0098] S5, continuous casting: under the protection of nitrogen, enabling the copper strip treated in step S4 to continuously pass through a continuous casting device and a crystallizer, continuously casting the aluminum liquid treated in step S2 on the copper strip through a casting system, performing quenching crystallization on a copper-aluminum composite material by the crystallizer and performing oxygen-free continuous casting; [0099] wherein a casting speed is 1000 mm/min; a casting width is 50 mm; a casting thickness is 10 mm, and a cooling rate of the quenching crystallization is 150 C./min; and [0100] S6, continuous rolling: rolling the copper-aluminum composite material continuously cast in step S5 to prepare a copper-aluminum composite plate material prepared by aluminum liquid continuous casting; [0101] wherein a thickness of the copper-aluminum composite plate material prepared by liquid aluminum continuous casting is 7 mm, a rolling pressure is 1000000 N, a rolling speed is 1000 mm/min, and a rolling tension is 100000 N.

Embodiment 5

[0102] The present embodiment provides a process of a copper-aluminum composite plate material prepared by aluminum liquid continuous casting, which includes the following steps: [0103] S1, smelting: heating an industrial LF21 pure aluminum ingot to 750 C. and smelting for 2 h; [0104] S2, standing: adding the Cu@Si@Al Janus nanosheets prepared in Preparation Example 3 into the aluminum liquid smelted in step S1, wherein an addition amount is 6 wt % of the aluminum liquid, stirring and mixing for 30 min, degassing, and keeping the temperature and standing for 20 min; [0105] S3, copper strip pretreatment: treating a red copper T2 copper strip of 2 mm thick with steel brush hair, and then performing ultrasonic cleaning for 10 min, wherein the surface is coated with a layer of ethylene glycol dimethyl ether solution of 11-mercapto undecanoic acid with a concentration of 10 wt %; [0106] S4, copper strip heating: heating the pretreated copper strip obtained in step S3 to 350 C.; [0107] S5, continuous casting: under the protection of nitrogen, enabling the copper strip treated in step S4 to continuously pass through a continuous casting device and a crystallizer, continuously casting the aluminum liquid treated in step S2 on the copper strip through a casting system, performing quenching crystallization on a copper-aluminum composite material by the crystallizer and performing oxygen-free continuous casting; [0108] wherein a casting speed is 1000 mm/min; a casting width is 50 mm; a casting thickness is 10 mm, and a cooling rate of the quenching crystallization is 120 C./min; and [0109] S6, continuous rolling: rolling the copper-aluminum composite material continuously cast in step S5 to prepare a copper-aluminum composite plate material prepared by aluminum liquid continuous casting; [0110] wherein a thickness of the copper-aluminum composite plate material prepared by liquid aluminum continuous casting is 7 mm, a rolling pressure is 1000000 N, a rolling speed is 1000 mm/min, and a rolling tension is 100000 N.

Comparative Embodiment 1

[0111] Compared with Embodiment 5, the difference is that the Cu@Si@Al Janus nanosheets are prepared by Comparative Preparation Embodiment 1.

Comparative Embodiment 2

[0112] Compared with Embodiment 5, the difference is that the Cu@Si@Al Janus nanosheets are prepared by Comparative Preparation Embodiment 2.

Test Embodiment 1

[0113] The properties of the copper-aluminum composite plate materials prepared by aluminum liquid continuous casting prepared in Embodiments 1-5 and Comparative Embodiment 1-2 of the present invention and commercially available similar products were tested. The results are shown in Table 1.

TABLE-US-00001 TABLE 1 Bonding Composite Shear Interface strength strength strength layer Groups (MPa) (N/mm) (MPa) thickness (m) Embodiment 1 152 104.4 34.5 55 Embodiment 2 170 111.8 39.5 18 Embodiment 3 179 114.2 42.1 7 Embodiment 4 181 113.9 41.8 7 Embodiment 5 182 114.5 42.6 5 Comparative 161 106.2 35.4 47 Embodiment 1 Comparative 165 108.6 38.9 22 Embodiment 2 Commercially 127 78.1 25.2 147 available

[0114] From the above table, it can be seen that the copper-aluminum composite plate materials prepared by aluminum liquid continuous casting prepared in Embodiments 2-5 of the present invention have very well bonding strength and composite strength, large shear strength and small interface layer thickness.

[0115] The foregoing is merely preferred embodiments of the present invention, and not used to limit the present invention. Any amendments, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.