Method for explosively spraying coatings on surfaces of variable-diameter parts

The invention belongs to the technical field of thermal sprayed coatings, and particularly relates to a method for explosively spraying coatings on the surfaces of variable-diameter parts. Aiming at the problem that the thickness uniformity of the thermal sprayed coatings of the variable-diameter parts is difficult to control, a sectional overlapping and explosion spraying mode is adopted, and thecoatings with good thickness uniformity are formed on the surfaces of the variable-diameter parts by accurately controlling the overlapping distance and the circumferential radius. According to the method, implementation is easy, the problem of the spraying difficulty of the variable-diameter parts is effectively solved, the prepared coatings have excellent thickness uniformity and quality uniformity, spraying of multiple coating materials to the surfaces of the multiple variable-diameter parts can be achieved, and the use characteristic and requirement of spraying areas of the variable-diameter parts can be met effe