Newly Developed Advanced High Strength Steels For Automotive Lightweight Applications
Published 2013 ·
The automotive industry is using more and more advanced high strength steels (AHSS), aiming at reducing vehicle weight, minimizing emission, increasing fuel economy, and improving vehicle safety. This article focuses on the AHSS products recently developed at Nucor Corporation. With innovative chemistry and process designs, as well as a strictly controlled manufacturing operation carried out during the unique CSP® and down-stream processes, these newly developed steels possess finer, more uniform microstructure, with modified morphology and optimum fraction for each phase. Compared to the most commercially available AHSS, these new materials have higher strength-elongation balance, improved formability and stretch flangeability, enhanced impact toughness and crashworthiness, good coating or surface quality, as well as superior weldability and weld fatigue properties. Moreover, the property consistence of these innovative AHSS has been markedly improved.