Implementation of Structural and Morphological Wear Resistance Principles for Improving Tribological Characteristics of Steels

• Published in: Journal of friction and wear 2022, Vol.43 (1), p.54-64
• Main Authors: Bespalov, S. A., Duriagina, Z. A., Uvarov, V. N.
• Format: Article
• Language: English
• Subjects: Bearing capacity; Carbides; Classical and Continuum Physics; Dispersion; Martensite; Mathematical morphology; Mechanical properties; Microstructure; Phase composition; Physics; Physics and Astronomy; Principles; Steel; Surface layers; Tool steels; Tool wear; Tribology; Wear resistance
• ISSN: 1068-3666; 1934-9386
• DOI: 10.3103/S1068366622010044

— The principles of organizing wear-resistant microstructures based on the regularities of relationship between the essence of structure formation and the geometry of tribological contact are proposed. Their implementation makes it possible to purposefully regulate the phase composition of surface layers of structural and tool steels for providing high wear resistance. It is shown by the example of 40H steel that the carbide phase morphology is one of the main factors affecting the equilibrium roughness, structural and geometric parameters, and the bearing capacity of the contact surface, which are formed during friction and affect its tribological properties. It is established that the formation of the structurally and mechanically heterogeneous microstructure of cast 08G2C steel significantly reduces its wear compared to homogeneous steel. The increase in the dendritic colonies dispersion contributes to the increase in the wear resistance of cast material. It is shown that the formation of dispersed martensite with residues of large-size high-melting alloyed carbides instead of these carbides contributes to a significant increase in the wear resistance of H6VF steel.