A predictive model for the carbon concentration profile in vacuum carburized steels with acetylene was proposed. The model involves the process and boundary conditions based on the characteristic of vacuum carburizing with acetylene and carbon diffusivity with an alloying element effect. In order to verify the predictive model, the carbon concentration profile of a cylindrical SCM415 steel specimen vacuum carburized with acetylene was calculated using the finite element method. The carbon concentration profile calculated with the alloying element effect, the carbon diffusivity in the Fe-C binary system proposed by Tibbetts, and multiple time steps of carburizing and diffusion exhibited good agreement with the measured carbon profile.
Bibliographical noteFunding Information:
This research was supported by the Components and Materials Technology Development program from MOCIE and by the National Core Research Center (NCRC) program from MOST and KOSEF (Grant No. R15-2006-022-01002-0). The authors are thankful to DONWOO HEAT TREATING Co., Ltd. for the vacuum carburizing experiment and also to Korea Basic Science Institute for the measurement of carbon concentration using the EPMA.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry