TY - JOUR ID - 10652 TI - Improving the Microstructure, Mechanical and Magnetic Properties of AISI 4340 Steel Using the Heat Treatment Process JO - International Journal of Iron & Steel Society of Iran JA - IJISSI LA - en SN - 2981-0388 AU - Samadi Shahreza, Z. AU - Dini, G. AU - Taherizadeh, A. AD - Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran AD - Central Laboratory, University of Isfahan, Isfahan 81746-73441, Iran AD - Steel Institute, Isfahan University of Technology, Isfahan 84156-83111, Iran Y1 - 2013 PY - 2013 VL - 10 IS - 2 SP - 18 EP - 22 KW - AISI 4340 Steel KW - Heat treatment KW - Strength KW - Microstructure KW - Mechanical properties KW - Magnetic Properties DO - N2 - AISI 4340 steel is one of the super strong steels that can be selected for different applications. By designing the proper cycles of heat treatment, the optimum microstructure and properties of this steel can be achieved. In this study, different heat treatment cycles were introduced to achieve the optimum microstructure and improve the mechanical and magnetic properties of AISI 4340 steel. The results of tensile, impact, hardness, metallography and magnetic tests for various samples under different heat treatment cycles showed that parameters such as temperature and time of austenitizing and tempering were among the most important factors in achieving relatively a wide range of ultimate tensile strength (1467-933 MPa), impact energy (113-18 J), transport current density (1554-1347 mT), coercivity (1342-1240 A/M), diminished force (1165.6-947.5 mJ/kg) and microstructure (tempered martensite and bainite). This wide range of properties can lead to a large number of applications of this type of steel in various industries including manufacturing steel parts such as rotors. UR - https://journal.issiran.com/article_10652.html L1 - https://journal.issiran.com/article_10652_a128a099a217e0a576c4c04a0ac1de3b.pdf ER -