Superhardenability behavior of vanadium in 40CrNiMoV steel |
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| Affiliation: | 1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;2. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China;1. Structural Integrity Group, Escuela Politécnica Superior, Avenida Cantabria s/n, 09006 Burgos, Spain;2. Civil Engineering Department, University of Burgos, Calle Villadiego s/n, 09001 Burgos, Spain;1. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, PR China;2. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore;3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China;1. School of Materials, The University of Manchester, Manchester M13 9PL, UK;2. TWI Ltd, Granta Park, Great Abington, Cambridge CB21 6AL, UK;1. TUBITAK MAM Materials Institute, Gebze 41470, Kocaeli, Turkey;2. Department of Material Science and Engineering, Gebze Technical University, Gebze 41400, Kocaeli, Turkey;1. Faculty of Materials Engineering, Sahand University of Technology, Tabriz, Iran;2. Advanced Processing Technology Research Centre, School of Mechanical & Manufacturing Engineering, Dublin City University, Dublin 9, Ireland |
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| Abstract: | The effects of vanadium on the hardenability, microstructures and mechanical properties of 40CrNiMoV steel were investigated after stabilizing nitrogen with aluminum by using an electron microprobe, a scanning electron microscope, a transmission electron microscope, and a hardness tester, etc. The existence state of vanadium in steel was also analyzed. Results showed that aluminum can effectively stabilize nitrogen by producing aluminum nitride. This phenomenon promoted the segregation of solid solution vanadium in grain boundaries, delayed the transformation of ferrite and improved the stability of austenite. Thus, vanadium can potentially improve the hardenability of steels. Excellent mechanical properties of 40CrNiMoV steel were obtained during slow cooling with the addition of vanadium, and this process can be used to produce heavy section steel components. |
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| Keywords: | Superhardenability Vanadium Grain boundary segregation Aluminum nitride |
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