Engineering•8 min read•Feb 05, 2026
Heat Treatment and Case Hardening Methods for Heavy-Duty Gears
Comparing carburizing, nitriding, and induction hardening to optimize tooth wear resistance and core structural toughness.
1. Hardening Methods: Carburizing vs. Nitriding
Industrial gears require a hard, wear-resistant outer shell and a tough, flexible core to absorb shock loads. Case hardening achieves this balance by diffusing carbon or nitrogen into the steel surface.
Gas carburizing is the industry standard for heavy-duty gears, providing deep case depths (up to 2mm) and high fatigue limit. Nitriding is performed at lower temperatures, minimizing heat distortion.
Article AuthorDr. Kenji TanakaPrincipal Engineer
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