| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.2 ( March 1981 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Properties of Hot Rolled High Strength Steel Sheets for Automotive Use
Isao Takahasi, Toshiyuki Kato, Hiroshi Hashimoto, Masatoshi Shinozaki, toshio Irie |
| Synopsis : There are three methods of increasing the strength of steel: solid solution hardening, precipitation hardening and dual phase (ferrite and martensite) structure hardening. The characteristics of high strength hot rolled steel sheet manufactured by these three methods are examined. Also, the mechanical properties, formability, weldability and fatigue properties of spot welded joins of 60 kgf/mm2 class tensile strength hot rolled steel sheet are studied. The dual phase steel sheets have a lower yield ratio, high work hardening rate particularly in the low strain region and excellent properties of elongation and stretch frangeability, compared with conventional high strength steel sheets. |
| TextiPDF: 8p./400kbj |