Surface hardening treatments, also known as thermochemical surface treatments, modify the composition of the outer layers of a material, enhancing hardness, wear resistance, fatigue strength, and corrosion resistance. Through the controlled diffusion of elements such as carbon and nitrogen, introduced via dedicated atmospheres and specific temperatures, high-performance functional surfaces are obtained, ideal for components operating under severe conditions.
Gaser Group performs surface hardening treatments such as gas nitriding, ferritic nitrocarburizing, and post-oxidation cycles, applied to structural steels, tool steels, and cast irons. Additionally, case hardening, quenching, and carbonitriding are carried out specifically for structural steels.
These treatments are used across multiple industries, including: automotive, general engineering, aerospace, energy, Oil & Gas, plant engineering, hydraulics, pneumatics, food, and pharmaceuticals, where hard, stable and long-lasting surfaces are essential.
Ideal for enhancing surface hardness, dimensional stability, and component durability in operation.
Types of thermochemical treatments
Carburizing and Hardening
Carburizing and hardening is a thermochemical surface treatment for construction steels. Provides high surface hardness combined with a tough and ductile core.
Carbonitriding
Carbonitriding is a thermochemical surface treatment for construction steels. Ensures elevated surface hardness while maintaining core toughness.
Gas Nitriding
Gas nitriding is a thermochemical surface treatment for steel. Produces a hard, wear-resistant surface layer.
Ferritic Nitrocarburizing
Ferritic nitrocarburizing is a thermochemical surface treatment for steel. Increases surface hardness and improves wear resistance.
Post-Oxidation
Ferritic nitrocarburizing with post-oxidation is surface treatment that forms a protective oxide layer after gas nitriding or ferritic nitrocarburizing. Enhances corrosion resistance and improves the surface appearance.
Benefits and advantages of thermochemical treatments
Improved surface performance
These treatments significantly increase resistance to wear, abrasion and fatigue, while preserving the core toughness
Dimensional stability and repeatability
Low-temperature cycles allow treatment of finished parts or components with tight tolerances, ensuring consistent quality and uniform results
Tailor-made solutions for each component
We design the most suitable treatment based on the material and geometry of each part, ensuring top performance in every application
Corrosion protection
Some surface hardening treatments, such as those followed by post-oxidation, also improve resistance to oxidation and chemical agents
Discover the treatments