Abstract:

Hot stamping of ultra high-strength steels (UHSS) is a new and complex forming technology integrating metal hot forming and the quenching process. UHSS has many advantages due to hot stamping, such as low flow stress, good plasticity, and high forming limit. The shape accuracy and strength of parts formed using hot stamping are very high. So the strength of hot stamping parts satisfies the requirement of auto security, although the thickness of parts is reduced. In this paper, the types of UHSS, the key technologies of hot stamping were introduced. The main content and development status of hot stamping experimental study and numerical simulation study were summarized and reviewed, and the problems at present were also commented. Also, the content for further research and study direction were prospected.

Key words: hot stamping, quenching, ultra high-strength steels