Gadolinium-containing stainless steel neutron absorption composite plate and preparation method thereof

The invention belongs to the field of neutron absorption materials, and particularly relates to a gadolinium-containing stainless steel neutron absorption composite plate and a preparation method thereof. The preparation method comprises the following steps that firstly, a stainless steel material and gadolinium particles are smelted in a vacuum arc smelting furnace according to the proportion, then the Gd-containing stainless steel neutron absorbing material is obtained through furnace cooling and serves as a core layer, and the adding amount of Gd does not exceed 5% of the total mass of the core layer; then two stainless steel plates with the same size as the core layer are cut to serve as coating layers; after surface treatment, the core layer and the coating layer are tightly attached to obtain a three-layer composite plate blank; and finally, carrying out homogenization treatment and hot rolling processing to obtain the gadolinium-containing stainless steel neutron absorption composite plate. The constra