Fiber Laser Welding of Dual-Phase and Bake-Hardened Steels

Abstract

Microstructural changes and microhardness profiles of laser-welded dual-phase DP600 and bakehardened 220BH steels were evaluated. The joints of these steels were butted with different welding parameters. They exhibited the microstructural changes, from ferrite and martensite in dual-phase steels or ferrite in bake-hardened steels to acicular ferrite, bainite and martensite in the fusion and heat-affected zones of the weld joints. As a result of welding, microhardness increases significantly in the fusion zones and even more in the heat-affected zones near DP600 steel.

Deep-Drawing Process Simulation for Tailor-Welded Blanks with an Elastic Blankholder

“…These growing requirements are related to safety increasing and fuel requirements reducing which are associated with reducing of total weight. These requirements can be met in the carrying bodyworks construction by using of drawn parts made of tailor welded blanks (TWBs) [1][2][3][4]. The TWBs are semi-finished parts that usually consist of materials with different stress-strain properties, but they can be made of materials with different thicknesses or coatings too.…”