Composite sulfide solid lubricating film and preparation method thereof

The invention discloses a composite sulfide solid lubricating film and a preparation method thereof. A technical scheme provided in the invention is as follows: the composite sulfide solid lubricating film is characterized by comprising a laser cladded layer which is obtained by carrying out laser cladding on a substrate and a sulfide layer obtained through sulfurizing. The invention has the following beneficial effects: the composite sulfide solid lubricating film is formed on a laser cladded Ni-based metal ceramic coating after sulfurizing, there is no obvious border between the composite sulfide solid lubricating film and the laser cladded Ni-based metal ceramic coating, and thus the lubricating film has a compact structure and has strong bonding capacity with the laser cladded layer; metallurgical bonding between the Ni-based metal ceramic laser cladded layer and the substrate can be realized; the laser cladded layer is rich in the elements of Fe, W and Mo, the composite sulfide solid ...