Method and apparatus for hot forming and hardening a blank

US8733144B2 · kind B2 · utility

Assignee

• BENTELER AUTOMOBILTECHNIK GMBH · DE

Inventors

• Martin Pohl · Altenbeken, DE
• Markus Pellmann · Sassenberg, DE
• Otto Buschsieweke · Paderborn, DE
• Stefan Adelbert · Ritterhude, DE

Key dates

• Filing date: Dec 30, 2010
• Grant date: May 27, 2014
• Expiry date: Jun 29, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D2221/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A blank cut from a strip of hardenable hot-formed steel is heated in a furnace to a temperature which is smaller than an Ac3 transformation point in an iron carbon diagram. A first region of the blank is then heated in a conductive heating station to a temperature above the Ac3 transformation point and subsequently hardened in a hot forming and hardening tool to produce a steel part with at least two microstructured regions of different ductility.