Method for improving hardness of CVD diamond

The invention relates to the technical field of material science, and discloses a method for improving the hardness of the CVD diamond. The method comprises the following steps of S1, preparing hardware and installing related hardware facilities, firstly preparing an electron gun capable of emitting a high-energy particle beam with the irradiation dose reaching as described in the specification, preparing a rotating platform and a clamp for fixing the CVD diamond, connecting the diamond clamp with the top end of the rotating platform and installing the rotating platform and the electron gun atthe working positions, and S2, selecting raw materials, namely selecting CVD diamonds with regular shapes and moderate sizes from a plurality of CVD diamonds with different sizes, and fixing the CVDdiamonds in the diamond clamp. According to the method for improving the hardness of the CVD diamond, the hardness of the CVD diamond can be effectively improved, the using effect of the CVD diamond during industrial use is im