Research of surface microstructure of the steel 40CrNiMo after EDM

Autor:	A. O. Grisharin, Timur Rizovich Ablyaz, L. D. Sirotenko, E. A. Morozov, E. S. Shlykov, E Matigullina, A. V. Shafranov, Karim Ravilevich Muratov
Rok vydání:	2020
Předmět:	Surface (mathematics) Hardened steel Materials science Electrical discharge machining Metallurgy Tempering Microstructure Indentation hardness Layer (electronics)
Zdroj:	IOP Conference Series: Materials Science and Engineering. 754:012007
ISSN:	1757-899X 1757-8981
Popis:	The aim of the work is to study the influence of modes of electrical discharge machining, on the microstructure and microhardness of the treated surface of thermally hardened steel 40CrNiMo. To fulfill the task, a sample was made of hardened steel 40CrNiMo. The sample was processed in various modes of electrical discharge machining. Microsections were made from the obtained sample. Metallographic and microdurometric analysis was carried out. The study of the microstructure showed that no clearly defined altered layer was detected in all processing modes. The study of microhardness showed that near the surface of the studied samples there is a drop in the level of microhardness. This phenomenon is caused by tempering during the surface heating during processing. The heat-affected zone does not exceed 1.2 mm, and is minimal under high-performance modes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::106232881147f02be21e41b724dc4d70 https://doi.org/10.1088/1757-899x/754/1/012007 Zobrazit plný text záznamu