Preparation method of sample for testing metallographic structure of vanadium-based alloys

The invention discloses a preparation method of a sample for testing metallographic structure of vanadium-based alloys. The preparation method includes the steps of 1, collecting a sample from vanadium-based alloy material; 2, inlaying the sample into a resin base; 3, using various different abrasive papers to grind the sample on the resin base according to a set sequence; 4, using a lubricant topolish the ground sample in a set sequence through various different polishing agents; 5, eroding the polished sample in a corrosive agent for 10-70 s, using saturated borax solution to neutralize thecorrosive agent, taking out the sample, washing with clear water, washing with absolute ethyl alcohol, and blow-drying the washed sample to obtain the metallographic sample for testing and analysis of metallographic structure. The technical problem is effectively solved that falling chips and embedded sand easily occur during sample preparation with vanadium-based alloys; sample quality is improved reliably and feasibly;