Method for preparing Al/Pb lamellar composite materials

The invention relates to a method for preparing Al/Pb composite materials, which comprises three steps of base body surface pretreatment, surface chemical plating and metal bathing. An Al base body adopts a molten salt method for surface pretreatment for removing oil and oxides on the base body surface, and the fresh surface is protected form being oxidized again; the molten salt chemical platingis carried out in chloride molten salt containing lead elements, in addition, a certain amount of auxiliary salt is added into the molten salt for optimizing the alloy composition of a plating layer,and a transition layer is formed at the interface of the Al/Pb composite material; the metal bathing treatment is carried out in a Pb alloy melt body for many times after the chemical plating, and the ingredient and the thickness of the plating layer are controlled; and then, the heat treatment is carried out, the mutual diffusion of bonding interface elements is promoted, the stress of the plating layer is eliminated, the