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The investigation of wear and mechanical properties of carburized AISI 8620 steel by powder metallurgy

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  • Received: 23 December 2019Revised: 22 March 2020Accepted: 24 March 2020Available online: 26 March 2020
  • In this study, the effect of carburizing on tensile strength and wear resistance of AISI 8620 steel were investigated. Firstly, the alloy with 0.25 %C content was pressed at 700 MPa and sintered at the temperature of 1300°C, 1400°C and 1500°C for 1 hr. After determination of ideal sintering temperature, the carburizing process was applied to Alloy 1 and Alloy 2 (0.2 C% and 0.25%C) at 925°C for 4 h. The microstructure of the samples was characterized by Optical microscopy(OM), scanning electron microscopy (SEM). The mechanical and wear behavior of carburized and non-carburized samples were investigated by hardness, tensile and wear tests. The increase in ultimate tensile strength for Alloy 1 and Alloy 2 after carburizing was calculated as 134.4% and 138.1%, respectively.However, the decrease in elongation % for Alloy 1 and Alloy 2 after carburizing was determined as 62.6 % and 64.7 %, respectively. It is reported that the wear depth values of Alloy 2 for non-carburized and carburized conditions under load of 30 N is 231.2 µm and 100.1 µm, respectively. It is observed that oxidative wear changed to abrasive wear for the transition from load of 15N to load of 30N for Alloy 1 and Alloy 2.
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The investigation of wear and mechanical properties of carburized AISI 8620 steel by powder metallurgy

  • Corresponding author:

    Fatih Aydin    E-mail: fatih.aydin@karabuk.edu.tr

  • 1. Department of Biomedical Engineering, Karabuk University, Karabuk 78050, Turkey
  • 2. Department of Metallurgical and Materials Engineering, Karabuk University, Karabuk 78050, Turkey

Abstract: In this study, the effect of carburizing on tensile strength and wear resistance of AISI 8620 steel were investigated. Firstly, the alloy with 0.25 %C content was pressed at 700 MPa and sintered at the temperature of 1300°C, 1400°C and 1500°C for 1 hr. After determination of ideal sintering temperature, the carburizing process was applied to Alloy 1 and Alloy 2 (0.2 C% and 0.25%C) at 925°C for 4 h. The microstructure of the samples was characterized by Optical microscopy(OM), scanning electron microscopy (SEM). The mechanical and wear behavior of carburized and non-carburized samples were investigated by hardness, tensile and wear tests. The increase in ultimate tensile strength for Alloy 1 and Alloy 2 after carburizing was calculated as 134.4% and 138.1%, respectively.However, the decrease in elongation % for Alloy 1 and Alloy 2 after carburizing was determined as 62.6 % and 64.7 %, respectively. It is reported that the wear depth values of Alloy 2 for non-carburized and carburized conditions under load of 30 N is 231.2 µm and 100.1 µm, respectively. It is observed that oxidative wear changed to abrasive wear for the transition from load of 15N to load of 30N for Alloy 1 and Alloy 2.

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