Formation of Diffusion Coatings Based on Nickel and Chromium in the Medium of Fusible Liquid Metal Solutions on Austenitic Steels

Abstract:

The technology of diffusion saturation of austenitic steels by chromium and nickel in the medium of low-melting liquid metal melts is shown. The saturation temperature was up to 1050°C, and the duration was up to 8 hours. It was found that it is the most effective to apply coatings according to the technological scheme: pre-carburization-diffusion metallization – final carburization. It was found that the coating consists of 4 layers. The surface layer has a thickness of up to 5 mkm and a microtuberance of up to 19500 MPa. The second layer, up to 12 mkm thick, has a microhardness of up to 7500 MPa. The third, up to 50 mkm thick, has a microhardness of 2300 MPa. In the fourth layer, up to 150 mkm thick, the microhardness gradually decreases from 2300 MPa to the microhardness of the base. At the same time, the total thickness of the coatings is up to 200 mkm.

• Periodical: Solid State Phenomena (Volume 316)
• Pages: 851-856
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.316.851
• Online since: April 2021
• Authors: Aleksandr G. Sokolov, Eduard E. Bobylev*, Ivan D. Storozhenko
• Keywords: Austenitic Steel, Carburization, Chromium, Diffusion Coating, Microhardness, Nickel

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