Preprocessing method for fire fused bead electron microscope image acquisition

The invention relates to the technical field of molten bead pretreatment, and particularly discloses a pretreatment method for fire molten bead electron microscope image acquisition. The pre-treatment method for fire hazard molten bead electron microscope image acquisition comprises two or more steps of sampling, inlaying, grinding and polishing, ultrasonic cleaning, etching and spraying. The method is suitable for a pretreatment method for obtaining the surface microstructure, the internal organization form, the hole morphology and other characteristics of the molten beads through an electron microscope, and a basis can be provided for follow-up comprehensive judgment of the types of the molten beads in combination with the electron microscope; the method can be used for comprehensively judging the type of the molten bead by using an electron microscope, more fire scene information is provided for investigators from the microscopic level, and subsequent quantitative research on various indexes of the molten