Effect of the Temperature and the Holding Time on Carburizing Treatment of 18CN4 and 22MC4 Steels

The resistance to wear and fatigue of mechanical parts subjected to high loads is heavily influenced by the surface of those parts. Producing a hard surface layer over a less strong substrate increases mechanical wear and fatigue resistance in the vast majority of circumstances. A good solution to the exposed problem is a hard layer of steel created by carburizing that bonded progressively to a martensitic area of high hardness and to a core steel of lower hardness and greater toughness. The higher concentration of carbon atoms in the interstitial sites of austenite before quenching accounts for the carburizing layer’s high hardness. The existence of ferrite and pearlite components, which arise when the cooling rate after austenitization falls below the critical one, results in a decreased hardness of the core after quenching. The goal of this research was to use a pack carburizing process to create a cemented surface layer on low alloy steel. As parameters of the solid carburizing treatment, several steel grades, austenitization temperatures, and soaking periods were used. Carbon atoms from the cement powder diffuse toward the steel’s surface during this treatment, forming iron carbide compounds. Various characterisation techniques were used to evaluate the effect of carburizing parameters on the pace of transformation, the thickness and morphology of carburizing layers, and the structure and hardness of the surface of steels produced by carburizing treatment.

Author(S) Details

Younès Benarioua
Mechanical Engineering Department, Faculty of Technology, University of M’sila Bordj Bou Arréridj Read, M’sila-28000, Algeria Emerging Materials Research Unit, University of Sétif 1, Sétif-19000, Algeria.

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