Abstract

Hot forming steels are a special class of steels, which can be hardened after forming process in the press. These steel chemistries are modified such that the martensite formation can be ensured at cooling rates that can be achieved with water-cooled dies. This chapter reviews the hot stamping technology, several hot formable steel grades, the special coatings used for these steels in order to avoid scale formation and decarburization, and typical applications in the automotive industry. Lastly, tailor welded, tailor rolled, and tailor hardened blanks are also reviewed.

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