Method of making a hardened motor-vehicle part of complex shape

US7004004B2 · kind B2 · utility

Assignee

• BENTELER AUTOMOBILTECHNIK GMBH · DE

Inventors

• Wilhelm Arns · Paderborn, DE
• Hans-Jürgen Knaup · Bad Lippspringe, DE

Key dates

• Filing date: Feb 19, 2004
• Grant date: Feb 28, 2006
• Expiry date: Feb 19, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D7/13
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A hardened steel part of complex shape is made from a workpiece by first heating the workpiece to an annealing temperature. Then, while the workpiece is still at the annealing temperature, the workpiece is rapidly deformed by a machine into an intermediate shape. The deformed workpiece is then moved from the machine to a press, and, while the workpiece is still at the annealing temperature, it is deformed in the press to the complex shape and then held in the press to harden the workpiece.