Abstract
It is an effective means to make automotive structural parts of medium manganese steel, which is highly plastic, to achieve lightweight, but the martensite phase change occurs in the formation of manganese steel, which changes its mechanical properties and makes it difficult to evaluate the service performance of the parts. Therefore, the peak of Barkhausen noise (MBN) signal was studied, and the relationship curve based on MBN signal is obtained. According to the design stamping experiment of U-shaped parts of the same material, XRD and MBN test and verify the stamping steel properties respectively.