▎ 摘　　要

NOVELTY - A preparation method of high-strength and high heat-conducting graphene-dispersed ODS steel composite material, involves (1) mixing graphene nanosheet with ODS steel powder by a low speed ball milling of a planetary ball mill to obtain mixed powder, (2) high-speed ball milling the mixed powder obtained in the step (1) in the planetary ball mill for a period of time to obtain graphene-reinforced ODS steel-based composite powder, and (3) discharge plasma sintering the composite powder obtained in the step (2) to prepare a finished product. USE - Preparation method of high-strength and high heat-conducting graphene-dispersed oxide dispersion strengthened steel composite material (claimed) for advanced nuclear energy system. ADVANTAGE - The method enables preparation of high-strength and high heat-conducting graphene-dispersed ODS steel composite material with room temperature tensile strength of 1160-1250 MPa and elongation rate of 13-15%. The method has short preparation period, simple and effective process. The graphene nano-sheet is uniformly dispersed in the substrate and improves the interface strength of the graphene and the substrate into graphene to exert the strengthening phase effect and the success of the composite material preparation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a high-strength and high heat-conducting graphene-dispersed ODS steel composite material.