High Strength Hot Rolled Steel Sheets For Automobiles

Request pdf high strength hot rolled steel sheets for automobiles large weight reduction by application of high strength steels to underbody parts can be expected since relatively thick sheets.

High strength hot rolled steel sheets for automobiles.

The rolls induce plastic deformation. As an example a hot rolled steel product may have a yield strength of 235 mpa. Hot rolled high strength sheet steels have been applied to suspension parts in automobiles 6 for the weight reduction. These cold rolled steel sheets with the world s highest strength have excellent spot weldability superior bendability and excellent delayed fracture properties.

As the working takes place in temperatures below the rescrystallisation temperature strain hardening occurs. 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. Thus the yield strength of cold rolled steel is higher than that of hot rolled steel. High strength hot rolled steel sheets for automobiles manabu takahashi 1 osamu kawano 2 teruki hayashida 3 riki okamoto 4 hirokazu taniguchi 4 abstract large weight reduction by application of high strength steels to underbody parts can be expected since relatively thick sheets are now adopted.

These steel sheets can be an alternative to steels for hot stamping because of the high yield strength.