Paper Title:

Integral Approach and Numerical Improvement to Calculate Carbon Concentration Profiles in Carburising

Periodical Advanced Materials Research (Volumes 264 - 265)
Main Theme Advances in Materials and Processing Technologies II
Edited by M.S.J. Hashmi, S. Mridha and S. Naher
Pages 1494-1499
DOI 10.4028/www.scientific.net/AMR.264-265.1494
Citation Wei Min Gao et al., 2011, Advanced Materials Research, 264-265, 1494
Online since June, 2011
Authors Wei Min Gao, Ling Xue Kong, Peter D. Hodgson
Keywords Carburising, Diffusion, Diffusivity, Integral Method, Numerical Simulation
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The 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.

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