The invention relates to a vanadinizing timing chain for an engine, which can replace a belt and a gear, also has the advantages of being heat-resistant, wear-resistant, oxidation-resistant,
corrosion-resistant and long in service life, and can meet the requirements of high rotation speed,
variable load and high
impact of the engine. A chain pin shaft is a GCr15 pin shaft, and a
surface layer of the GCr15 pin shaft is a metallic cementation layer; the vanadinizing timing chain comprises an engine timing chain; the chain pin shaft in the engine timing chain is the GCr15 pin shaft, and the
surface layer of the GCr15 pin shaft is the metallic cementation layer; a chain plate in the engine timing chain is tooth-shaped, and the tooth-shaped meshing arc surface is a concave-convex tooth meshing surface. The vanadinizing timing chain has the advantages that 1 the pin shaft is prepared from a GCr15 material, and the GCr15 pin shaft is subjected to chemical
thermal treatment by adopting a metallic cementation, so that the chain pin shaft has the advantages of being heat-resistant, wear-resistant and oxidation-resistant; 2 the shearing strength of the pin shaft is increased, through
extrusion and elastic deformation of the aperture of a tooth plate, abrasion on the apertures of the pin shaft and the tooth plate is reduced, the service life of the whole chain is prolonged, and the
static strength of the whole chain is increased.