Year-end Sale % OFF 
Abstract
The 20MnMoNb steels were gas-oxynitrided for 2 h at 610 °C in a controlled atmosphere by the self-making process control system and gas oxynitriding technology. The microstructure, hardness, wear and corrosion resistance of the 20MnMoNb steels by gas oxynitriding were studied by OM, XRD, hardness test, wear test and neutral salt spray test. The results show that the thickness of diffuse layer is about 0.25 mm and that of the compound layer formed on the surface is about 50 μm. The compound layer is made of bulky columnar crystals, which have different morphology in the different form positions. The compound layer surface of gas-oxynitrided specimens consists of e-Fe3N, magnetite—Fe3O4 and inner surface consists of e-Fe3N and Fe4N. The different oxygen and nitrogen concentrations lead to different morphologies in the different positions of bulky column crystals. The compound layer has a good hardness distribution and high wear and corrosion resistance.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
