Prediction of Microstructure and Mechanical Properties in Hot Stamping

E-ISSN： 1662-8985|2014|1063|314-317

ISSN： 1022-6680

Source： Advanced Materials Research, Vol.2014, Iss.1063, 2015-01, pp. : 314-317

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Abstract

Hot stamping process has been increasingly used in producing structural components of automobile to improve crash worthiness and fuel efficiency. Hot stamping process can produce ultimate tensile strength parts as high as 1500MPa. The high strength of hot –stamped components is attributed to the martensitic phase transformation which is transformed from austenite at elevated temperature. An improved model is developed based on Li’s phase transformation model to predict the austenite decomposition into ferrite, pearlite, bainite and martensite during arbitrary cooling paths for thin sheet boron steel. The simulated volume fractions and hardness profiles shows acceptable agreement to the corresponding experimental observations.