Die materials and wear in stamping AHSS/Part I: Die wear and die coatings

摘要

Advanced high-strength steels (AHSS) are used extensively in the automotive industry to help improve crash safety and reduce weight. With the increased strength of AHSS, however, come dramatically increased springback and forming load (and, therefore, contact pressure) corn-pared to milder steel grades. In many cases, forming pressures are increased on purpose to reduce spring-back, but this can contribute to increased tool wear and galling. Therefore, it is neccessary to explore the use of new tool materials and surface modifications.