The invention provides a re-manufacturing method of an
engineering machinery axle and a
coating of the
engineering machinery axle. The re-manufacturing method comprises the following steps of: a, determining the rest service life of the waste axle by
nondestructive testing; b, pre-treating the surface of the axle having enough rest service life for use; c, carrying out
thermal spraying process, preparing a Fe-based amorphous
alloy coating with excellent
corrosion resistance by adopting a
plasma spray technology or preparing a WC-Co wear-resisting layer by adopting a supersonic
flame-spraying technology; and d, carrying out successive fine process, so that the size precision of the remanufactured part can reach the design requirements. The Fe-based
coating comprises the following components: 1-3% of Mo, 5-7% of Cr, 1-3% of Ni, 9-11% of P, 2-4% of Si and the balance of Fe; the particle size of the
powder is 400-160 meshed; and the WC-Co coating uses the thermal spray
powder as spray material, wherein the particle size of the
powder is 15-45 mum, WC particles are coated by
metal Co, and the particle size of a WC hard particle is 0.1-10 mum. The method and coating provided by the invention are good in properties, the wear-resisting and anticorrosion properties of the remanufactured part tends to be superior to those of the original product, and the method can be used for technically updating the
engineering machinery axle parts at the expiration of the term of service.