High-alloy tool steels require the production of a very clean material with specific mechanical, physical and metallurgical properties. Metallographic inspection, from the initial casting stage to the final heat-treated product, is an essential tool for controlling the manufacturing and heat treatment processes.
Metallic zinc is used for corrosion protection of cast irons, mild steels and low-alloy steels. The metallography of galvanized products includes measuring coating thickness, microstructure analysis, base metal adhesion checks and failure analysis. Depending on the galvanizing method, zinc coatings behave differently during metallographic preparation, which makes selecting the correct method essential.