Thermal and Mechanical Characteristics of a HSLA Steel as Joint Partner for Hot Stamping Tailor Welded Boron Steel

In order to further reduce the weight and at the same time guarantee the automobile safety, hot stamping of Tailor-Welded Blanks (TWBs), is developed recently to meet the environmental and safety requirements by supplying car structural body components with functionally optimized and tailored mechanical properties. In the article, an appropriate partner material for the quenchenable boron steel B1500HS based on the phase transformation and deformation behavior under process relevant conditions is determined. Microhardness is measured and metallographic is investigated. It is verified that the B340LA steel is an appropriate joint partner with ideal thermal and mechanical properties.