The invention discloses a hot-rolled plate structure
toughness prediction method and
system combined with an
impact energy change curve, and belongs to the technical field of
metal material structure performance evaluation.The method comprises the steps that an
impact test is conducted on a hot-rolled plate sample, and an
impact force-displacement curve and an
energy absorption-
time curve are collected in real time; preprocessing the impact force-displacement curve and the
energy absorption-
time curve, and extracting characteristic parameters; acquiring
hardness distribution data of the hot-rolled plate sample, acquiring
hardness gradient data by using the
hardness distribution data, and taking the hardness gradient data as a correction factor of the curve characteristics; constructing a structure
toughness prediction model based on the characteristic parameters and the correction factors, and predicting the
toughness grade and the structure state of the hot-rolled plate; and outputting the toughness grade and the structure state of the hot-rolled plate. According to the method, the limitation that traditional metallographic detection consumes too long time and an
impact test only provides a single value is solved, double evaluation results can be obtained within 30 seconds after the
impact test, and the method is suitable for rapid online
quality monitoring and process adjustment of hot rolling production.