Abstract
The effect of hot stamping parameters on the mechanical properties of 22MnB5 steel sheet with thickness of 1.1 mm is studied. The considered parameters are austenization temperature (800–1000 °C), austenitizing soaking time (60–540 s), initial deformation temperature (560–800 °C) and tool temperature (20–220 °C). In order to obtain hot stamped parts with optimal mechanical properties, response surface methodology based on the central composite design has been employed to design the experiment matrix. Tensile strength of hot stamped parts is determined as the relation in the mathematical model. The optimal condition and objective effects of parameters are determined via this relation. The statistical analysis showed that all four factors significantly affect the tensile strength of the hot stamped parts. The optimum austcnization temperature is found to be 918.89 °C with the austenitizing soaking time, initial deformation temperature and tool temperature of 279.45 s, 684.69 °C and 21.85 °C, respectively. These optimal hot stamping parameters prove to have high tensile strength (1631.84 MPa) where deviation between predicted and actual response falls within 2%.
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Foundation Item: Item Sponsored by National Science and Technology Major Project of the Ministry of Science and Technology of China (2009ZX04014-074); Doctor Science Research Foundation of the Education Ministry of China (20120006110017)
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Huang, Md., Wang, By. & Zhou, J. Hot stamping parameters optimization of boron steel using a response surface methodology based on central composite design. J. Iron Steel Res. Int. 22, 519–526 (2015). https://doi.org/10.1016/S1006-706X(15)30035-2
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DOI: https://doi.org/10.1016/S1006-706X(15)30035-2