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Integral approach and numerical improvement to calculate carbon concentration profiles in carburising
journal contribution
posted on 2011-01-01, 00:00 authored by Weimin Gao, Lingxue KongLingxue Kong, Peter HodgsonPeter HodgsonThe carbon diffusion in steel, where the carbon diffusivity varies with the carbon content, was solved with the integral methods under the third boundary condition. The variation of carbon diffusivity in steel with the carbon content was described with two different functions, linear dependence and exponential dependence. The integral approximation for both cases was improved with the numerical computation to more accurately predict the carbon profiles. The integral solution is more accurate than the formulation based on the assumption of a constant diffusivity or those based on the assumption of a constant diffusivity and/or constant carbon content at part surface. It is also more easily used in practice than the numerical method to describe the carburising process and predict the carbon content at steel surface and carbon profiles in treated layer.
History
Journal
Advanced materials researchVolume
264-265Pagination
1494 - 1499Publisher
Trans Tech PublicationsLocation
Lausanne, SwitzerlandISSN
1022-6680Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2011, Trans Tech PublicationsUsage metrics
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