Comparison of the methods for calculating the interfacial heat transfer coefficient in hot stamping

• A theoretical formula was derived for direct calculation of IHTC.
• The Beck's method is a robust and accurate method for identifying IHTC.
• Finite element method can be used to identify an overall equivalent IHTC.

This paper presents a hot stamping experimentation and three methods for calculating the Interfacial Heat Transfer Coefficient (IHTC) of 22MnB5 boron steel. Comparison of the calculation results shows an average error of 7.5% for the heat balance method, 3.7% for the Beck's nonlinear inverse estimation method (the Beck's method), and 10.3% for the finite-element-analysis-based optimization method (the FEA method). The Beck's method is a robust and accurate method for identifying the IHTC in hot stamping applications. The numerical simulation using the IHTC identified by the Beck's method can predict the temperature field with a high accuracy.