High-yield-ratio dual-phase steel for cold-rolled automobiles is an important component of cold-rolled automobile high-strength steel. CR500/780DP cold-rolled dual-phase steel has high yield-strength ratio, no yield elongation, high strain hardening index and high work hardening index. Features: It is one of the important materials for lightweighting automobiles. It is suitable for structural parts, reinforcements and anti-collision parts that require high strength, such as cross members under the car, anti-collision reinforcements, etc.
Dual phase steels
Dual Phase steels offer a good combination of strength and stampability as a result of their microstructure, in which a hard martensitic or bainitic phase is dispersed in a ductile ferritic matrix. These steels have high strain hardenability. This gives them not only good strain redistribution capability and thus stampability, but also finished part mechanical properties, including yield strength, that are far superior to those of the flat metal. The yield strength of Dual Phase steels is further increased by the paint baking (also called Bake Hardening, BH) process.
This high level of mechanical strength obtained in parts lends these steels excellent fatigue strength and good energy-absorption capacity, making them suitable for use in structural parts and reinforcements.
Applications
Given their high energy absorption capacity and fatigue strength, cold-rolled Dual Phase Steels are particularly well suited for the manufacture of automotive structural and safety parts such as longitudinal beams, crossmembers and reinforcements.
