engleski

Computer Simulation in Gas Quenching

Computer simulation of a process consists generally of thermal analysis, phase transformation calculations, stress and strain analysis and distortion prediction. In gas quenching applications (e.g. in high pressure circulated gases in vacuum furnaces), compared to simulation of an oil quenching process, the difference is in thermal analysis due to different physical nature of these two processes. While in gas quenching there is no film and nucleate boiling phases, like in oil, and consequently no wetting problems, the heat transfer mechanism consists of convection, but also radiation, which does not exist in oil (which can be predicted using the Jominy test), and when gas quenched. The method to establish the hardening responce of a steel when gas quenched, the factors affecting heat transfer and the way to establish real heat transfer data when gas quenching a batch of worpieces, have been described.

gas quenching; heat transfer; computer simulation

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