Thermal-Assisted Roll Forming of High Strength Material

摘要

A thermal-assisted method deforms plastically a high-strength material using a high-intensive heat source. The high-strength material may be a cold-rolled sheet aluminum of strength greater than 300 megapascal (MPa) or a cold-rolled sheet steel of strength greater than 1000 MPa. The cold-rolled sheet metal is heated just before bending to a temperature near or above the critical temperature for the material and is followed by rapid quenching after bending.

主权项

1. A process, for roll forming of high-strength cold-rolled sheet metal, comprising:
feeding high-strength cold-rolled sheet metal continuously between rollers on a roll-forming production line; providing intense heat from a heat source locally prior to bending of the high-strength cold-rolled sheet metal; heating, with the intense heat, the cold-rolled sheet metal to a temperature within a two-phase sub-critical temperature region or above a critical temperature for the high-strength cold-rolled sheet metal; bending the high-strength cold-rolled sheet metal; and quenching the high-strength cold-rolled sheet metal rapidly after bending for the cold-rolled sheet metal to retain a high-temperature phase structure at room temperature.