The present invention relates to a method of manufacturing a piston for increasing wear resistance and heat insulation, and to a piston manufactured by the manufacturing method, wherein the piston base material is treated with a salt bath to increase overall hardness and increase the local abrasion resistance of the ring groove to which the piston ring is joined, while skirting It aims to secure insulation performance in the part.
In the method of manufacturing a piston for increasing wear resistance and heat insulation according to the present invention, a piston having a pinhole formed on the side and a skirt portion connected to the connecting rod by a piston pin inserted into the pinhole and a crown portion integrally formed in the skirt portion is manufactured. A method comprising: a first step of casting a base material of a piston; A second step of treating the base material prepared in the first step with a dye bath; A third step of forming a carbon film on the sliding surface of the base material after the second step; And a fourth step of forming a heat insulating film on the surface of the skirt portion of the base material. The first step is to induce the behavior of the piston ring coupled to the ring groove by forming a chamfered edge at the inlet edge of the ring groove of the base material, and the carbon film is formed across the surface and the sliding surface of the edge part. do.