Disclosed is an interlayer
vacuum coating method during a blank manufacturing process of a hot rolling
composite plate. A
vacuum coating device mainly comprises an electrolytic furnace, an electromagnetic oscillator, a
siphon pipe, a
siphon valve, a vacuum
pipe and a mechanical pump and
diffusion pump
assembly. Symmetrically combined stainless steel composite blank materials comprise two groups which each include a low
alloy steel base layer and a stainless steel cladding layer, and a
nickel plating interlay is generated between each low
alloy steel base layer and the corresponding stainless steel cladding layer. When the stainless steel cladding
layers of the two groups of blank materials are opposite, the space between the two stainless steel cladding
layers is coated with a separant layer. According to the specific operation method, the lateral surfaces of the stainless steel composite blank materials are drilled, then the vacuum
pipe, the
siphon pipe and the
composite plate are welded together, the periphery of the symmetrically combined stainless steel composite blank materials is sealed and vacuumized, and the vacuum pipe is sealed; the siphon valve is opened, molten
nickel in the electrolytic furnace is made to enter the space between the
layers of the stainless steel composite blank materials, and after the
nickel is condensed, multiple times of rolling is carried out. The interlayer
vacuum coating method during the blank manufacturing process of the hot rolling
composite plate is simple in process, good in product quality, high in yield and low in cost.