Determination of temperature difference(王勇).pdf

Int J Mater Form (2012) 5:317–324 DOI 10.1007/s12289-011-1061-8 ORIGINAL RESEARCH Determination of temperature difference in squeeze casting hot work tool steel Rong Ji Wang Junliang Zeng Dian-wu ZHOU Received: 11 June 2011 /Accepted: 20 July 2011 /Published online: 4 August 2011 # Springer-Verlag France 2011 Abstract The effects of process parameters on temperature Introduction difference (ΔTRECS) of the squeeze casting part were studied by employing artificial neural network (ANN) and Squeeze casting is one of the improved casting techniques Procast software when cooling up to recrystallization used for the production of engineering components by the temperature, such as interface heat transfer coefficient of application of pressure on the liquid metal to obtain higher metal/cavity die (h1), applied pressure (Ap), interface heat density, finer grain size and more homogenous microstruc- transfer coefficient of metal/male die (h2), die pre-heat ture. Squeeze casting operation involves the process of temperature (Dt) and pouring temperature (Pt). An ANN melting, pouring of the molten metal into the mould and model on the relationship between the processing parame- solidifying under high mechanical pressure maintained till ters and ΔTRECS was constructed. The test results on solidification ends, offers high productivity and excellent performance of the trained network show that the ANN near-net-shape formability. With casting process, it is model can predict ΔTRECS with reasonable accuracy. possible to cast large and intricate shapes which cannot be Employing the ANN model the following conclusions economically formed in one piece by either forging or could be made from this work: as