Method for improving wear resistance of drill pipe female adapter

The invention discloses a method for improving the wear resistance of a drill pipe female adapter. The method comprises the following steps of a molding step: processing a drill pipe joint into a stepped structure including a plurality of shoulders, wherein the outside diameter of the shoulder located at the outermost layer of the drill pipe joint is set to be K1, and the outside diameter of the shoulder located at the innermost layer of the drill pipe joint is set to be K2, wherein K1 is 4 mm-10 mm greater than K2; a heating step: heating the surface temperature of the shoulder located at the outermost layer of the drill pipe joint to be T1; a cooling step: performing quenching process on the surface of the shoulder located at the outermost layer of the drill pipe joint until the surface temperature of the shoulder located at the outermost layer is T2, and naturally cooling from T2, wherein T1 is 600 DEG C-750 DEG C higher than T2. The method for improving the wear resistance of the drill pipe female adapter provided by the invention has the characteristics of simple process and strong wear-resisting property, so that the wear of the shoulder located at the inner layer of the drill pipe joint can be effectively avoided, and the maintenance and replacement times can be reduced.