Copper-aluminum composite plate material prepared by aluminum liquid continuous casting and process thereof

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 SiO2 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 SiO2 hollow nanospheres;
• T2, ball milling:
• performing ball milling on the SiO2 hollow nanospheres prepared in step T1 to prepare SiO2 nanosheets;
• T3, modification:
• adding the SiO2 nanosheets prepared in step T2 into ethanol, adding a silane coupling agent, performing heating and stirring reaction, centrifuging, washing and drying to prepare modified SiO2 nanosheets;
• T4, preparation of CuO@SiO2@Al2O3 nanosheets:
• dissolving aluminum isopropoxide in dichloromethane, standing, adding the modified SiO2 nanosheets prepared in step T3, which float on an 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@SiO2@Al2O3 nanosheets;
• and
• T5, reduction:
• mixing the CuO@SiO2@Al2O3 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.