每年出版 4 期
ISSN 打印: 1093-3611
ISSN 在线: 1940-4360
Indexed in
STRUCTURE OF SURFACE LAYERS OF IRON AND CARBON STEELS TREATED BY COMPRESSION PLASMA FLOWS
摘要
Investigation on a surface structure of carbon steel (0.025-0.8 wt.% C) modified by the action of compression plasma flows, and determination of element and phase composition were carried out using X-ray diffraction analysis, Auger-electron spectroscopy, optical microscopy and scanning electron microscopy, along with studies on mechanical properties of the material. As a result of plasma action, the cellular structure composed of polygonal cells and the modified layer by thickness of tens micrometers immediately adjacent to a sample surface are formed. Its phase structure represents a superposition of following phases: ferrite, martensite, austenite (C, N), and e nitride phase. Concentration of nitrogen in the surface layer reaches 15-20 atomic percents. The final structure of near-surface area in the processed samples is formed from ε-domain due to eutectoid decomposition on cooling.
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Astashinskii V. V., Numerical Calculation of the Dynamics of Temperature Fields That Determine the Phase Composition of Polycrystalline Iron During Its Exposure to a Compression Plasma Flow, Journal of Engineering Physics and Thermophysics, 87, 4, 2014. Crossref