EFFECT OF RETAINED AUSTENITE ON PLASTIC CHARACTERISTICS OF DUAL PHASE STEELS

In terms of the current trend research and development new materials optimization in automotive industry, greatest attention is paid to progressive high-strength dual-phase (DP) steels with increased stampability, which are designed for cold stamping specific internal car body components market. New grades DP provide a combination high strength good formability contribute weight savings vehicle parts by 10 20 %, compared grades. Thanks their top properties, can absorb more crash energy using less steel. As result, DP780GI DP780GI-HF first generation (hereinfater DP780GI-HF) were analyzed. The stampability improvement was demonstrated experimentally determined Forming Limit Curves both steels.