Effect of tempering temperature on mechanical properties and microstructure of AISI 4140 and AISI 4340 tempered steels

Autor:	Erdem Saraç, Nursel Altan Özbek
Rok vydání:	2022
Předmět:	Mechanics of Materials Mechanical Engineering General Materials Science
Zdroj:	Materials Testing. 64:832-841
ISSN:	2195-8572 0025-5300
DOI:	10.1515/mt-2021-2151
Popis:	The AISI 4140 and AISI 4340 tempered steels are widely used in industry. This study investigated the effects of the tempering temperature on the mechanical properties of these steels. The steels were kept at 850 °C for 30 min, left in an oil environment, and then subjected to hardening. The samples were then tempered for 1 h at four different temperatures (300, 450, 550, and 650 °C). Hardness measurements were performed to determine the mechanical properties of the materials. In addition, the samples were subjected to tensile, notch impact, and wear tests. The samples were also examined microstructurally. The results revealed that the hardness, impact energy, and wear rates of samples of both steels decreased when tempering was applied after quenching. As the tempering temperature was increased, these values tended to decrease. However, the impact value increased in parallel with the tempering heat treatment and tempering temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::77e1d2fe14ff6693199156439a0e7ce8 https://doi.org/10.1515/mt-2021-2151 Zobrazit plný text záznamu