Mechanical behavior of borides formed on borided cold work tool steel |
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| Affiliation: | 1. Universidad Autónoma Metropolitana unidad Azcapotzalco, Ciudad de México, Mexico;2. Universidad Politécnica del Valle de México, Estado de México, Mexico;3. CONACyT-Universidad de Guadalajara, CUCEI, Jalisco, Mexico;4. Universidad de Guadalajara, CUCEI, Jalisco, Mexico;5. Instituto de Investigación de Materiales – UNAM, Ciudad de México, Mexico;1. Ahi Evran University, Faculty of Agriculture, Department of Agricultural Biotechnology, 40100 Kirsehir, Turkey;2. Osmangazi University, Faculty of Agriculture, Department of Animal Science, 26160, Eskisehir, Turkey;3. Ondokuz Mayis University, Faculty of Veterinary Medicine, Department of Animal Science, 55139, Samsun, Turkey;4. Gaziosmanpasa University, Faculty of Engineering and Natural Sciences, Department of Food Engineering, 60250, Tokat, Turkey;5. Namik Kemal University, Faculty of Agriculture, Department of Animal Science, 59000, Tekirdag, Turkey;6. Nigde University, Faculty of Agricultural Sciences and Technologies, Department of Animal Production and Technologies, 51240 Nigde, Turkey;7. Ondokuz Mayis University, Faculty of Agriculture, Department of Agricultural Biotechnology, 55139, Samsun, Turkey;1. College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;2. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, PR China;3. Shanxi Institute of Energy, Jinzhong 030600, PR China;4. Department of Mechanical Engineering, Pennsylvania State University, The Behrend College, Erie, PA 16563, USA;5. Shanxi Key Laboratory of Advanced Magnesium-based Materials, Taiyuan 030024, PR China;1. Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China;2. Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China;3. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;4. Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996, USA |
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| Abstract: | In this study, some mechanical properties of borided cold work low-alloy tool steels were investigated. Boronizing was performed in a solid medium consisting of Ekabor-I powders at 1000°C for 2, 4 and 6 h. The substrate used in this study was high-carbon, low-alloy tool steel essentially containing 1.18 wt.% C, 0.70 wt.% Cr, 0.30 wt.% Mn, 0.10 wt.% V and 0.25 wt.% Si. The presence of borides (FeB+Fe2B) formed on the surface of steel substrate was confirmed by optical microscope and X-ray diffraction (XRD) analysis. The hardness of the boride layer formed on the surface of the steel substrate and unborided steel substrate were 1854 and 290 kg/mm2, respectively. Experimental results revealed that longer boronizing time resulted in thicker boride layers. Optical microscope cross-sectional observation of the borided layers revealed denticular morphology. The fracture toughness of the boride layers measured by means of a Vickers indenter with a load of 3 N was in the range of 2.52–3.07 MPa m1/2. |
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