Low-carbon steel and low-carbon alloy steel (20 steel, 20Cr, 20CrMo, 20CrMnTi) 1. Preheat treatment – normalizing 2. Carburizing and quenching (carbonitriding) Carburizing is mainly to improve the wear resistance of the surface, and as the carbon concentration increases, the wear resistance is also good. The normalized structure of high carbon steel without quenching after carburizing … Continue reading What Are the Common Materials and Heat Treatment of Gears ?