Abstract
1. Mossbauer spectroscopy makes it possible to detect the following iron-containing phases in the surface layers of carburized and carbonitrided samples: martensite, austenite, cementite, and iron oxides. 2. The quantities of these phases depend on the conditions of the chemicothermal treatment and can be used to judge the quality of the treatment with the proper correction factor. 3. The layer nearest the surface is most sensitive to the quality of the chemicothermal treatment (a layer ∼0.1 μ deep) in which the spectra of iron oxides are observed along with those of compounds characteristic of the Fe-C system. 4. With chemicothermal treatment in an endothermal atmosphere, a high concentration of iron oxides is observed in surface zones as thick as 1 μ. The higher the concentration of alloying elements with a large affinity for oxygen in the solid solution, the larger the total concentration of oxides. 5. No oxides are observed on the surface of samples carburized in an atmosphere of methane at a pressure of 10−3 mm Hg.
Published Version
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.
