Nti-Wear Properties of Medium Carbon Steel After Carburizing With Subsequent Diffusion Chromizing and PVD Treatment

Abstract

The paper discusses the results of research on the structure and tribological properties of hybrid layers produced on the surface of medium-carbon steel in hybrid treatment, combining gas carburizing process with the next treatment, i.e. diffusion chromizing and PVD treatment. A comparison was made of the structure and tribological properties of the layers obtained as a result of hybrid treatment with the layers produced in a single diffusion chromizing process. The studies of the layers concerned their structure, chemical composition, thickness, and hardness. Linear wear of the layers were performed by means of three-cylinder-cone method. It has been shown that the linear wear of samples with hybrid layers, produced on medium carbon steel, is less than 50% of samples with single carbide layers. This indicates very good anti-wear properties of hybrid layers.

The Hybrid Process of Low-Pressure Carburizing and Metallization (Cr + LPC, Al + LPC) of 17CrNiMo7-6 and 10NiCrMo13-5 Steels

“…However, one of the most frequently applied elements that can ensure increase corrosion resistance is chromium. The use of chromium plating to increase the corrosion resistance is a procedure that is widely applied in the case of e.g., fuel cells [13], tools [14], or other elements made of different metal alloys [15][16][17][18][19][20].…”

“…An important aspect regarding the steel types subjected to carburizing is the content of retained austenite, which has an impact on the hardness of the layer obtained. The 2 of 10 high content of retained austenite results in decreased strength properties, such as wearresistance or abrasion-resistance [19,21]. In order to enable the martensitic transformation to take place, in case of steel types with increased chromium [22] and carbon content (or the carburized layer alone) it is necessary to apply thermal processing that encompasses subzero treatment during quenching [23,24].…”