High Strength Hot Rolled Steel Sheets For Automobiles

Advanced high strength steels ahss are complex sophisticated materials with carefully selected chemical compositions and multiphase microstructures resulting from precisely controlled heating and cooling processes various strengthening mechanisms are employed to achieve a range of strength ductility toughness and fatigue properties.

High strength hot rolled steel sheets for automobiles.

These steel sheets can be an alternative to steels for hot stamping because of the high yield strength. Today s ahss for automotive. As the working takes place in temperatures below the rescrystallisation temperature strain hardening occurs. These cold rolled steel sheets with the world s highest strength have excellent spot weldability superior bendability and excellent delayed fracture properties.

Thus the yield strength of cold rolled steel is higher than that of hot rolled steel. In this paper several. The rolls induce plastic deformation. Hot rolled high strength sheet steels have been applied to suspension parts in automobiles 6 for the weight reduction.

As an example a hot rolled steel product may have a yield strength of 235 mpa.