Integral approach and numerical improvement to calculate the carbon concentration profiles in carburising process
Gao, Weimin, Kong, Lingxue and Hodgson, Peter 2009, Integral approach and numerical improvement to calculate the carbon concentration profiles in carburising process, in AMPT 2009 : Forging a better future, AMPT Committees, Kuala Lumpur, Malaysia, pp. 1 (ID332)-14.
In the present work, 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 ie. 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.
Field of Research
091207 Metals and Alloy Materials 091505 Heat and Mass Transfer Operations 080110 Simulation and Modelling
Socio Economic Objective
869999 Manufacturing not elsewhere classified
HERDC Research category
E2 Full written paper - non-refereed / Abstract reviewed