▎ 摘　　要

NOVELTY - The pin has a solid lubricating film that includes a transition layer and a surface layer from the inside to the outside. The portion of the solid lubricating film includes a graphene layer outside the surface layer. The transition layer is a titanium metal layer. The surface layer is a composite layer composed of titanium, lead and molybdenum disulfide. The area of the solid lubricating film covered by the graphene layer is greater than 90%. The thickness of the surface layer is 1-2 ~m. The surface hardness of lubricating film is 7.5-8.0 GPa. The graphene layer is obtained by infiltrating the rotating joint pin with mixed solution of multilayer graphene powder and ethanol. The current of the titanium target is 2.5-3.5A, and the flow rate of argon gas is 15-18sccm. The current of molybdenum disulfide target is 0.7-0.9A. The purity of the multi-layer graphene powder is greater than 90 wt.% and the mass fraction of ethanol in the alcohol solution is 97 wt.%. USE - Rotary joint pin applied to spacecraft mechanism. ADVANTAGE - The rotating joint pin can reduce the sliding friction force and improve the motion accuracy through the solid lubricating film on the surface of the rotating joint pin structure. The friction form changes from sliding friction to rotational friction, which is more beneficial to lubrication. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a rotating joint pin applied to a spacecraft mechanism. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the rotating joint pin applied to spacecraft mechanism. U-shaped joint (1) Pin (2) Tongue (3)