Producing bipolar plates for fuel cells to transport austenitic workpieces, by magnetizing workpiece before transport into forming region, in which austenite is converted to ferrite and/or martensite, and moving workpiece by magnetic field

摘要

The method comprises locally magnetizing an austenitic workpiece before transport into a forming region (1.1, 2.1), in which austenite in the forming region is converted to ferrite and/or martensite by applying voltage and/or strain and by a combination of stretching train and a plane elongation, and subsequently moving the workpiece using a floating magnetic field. The workpiece is transported by a linear motor with a long stator. The forming region is located in an outer region of the workpiece, and forms a curvature of the workpiece. The method comprises locally magnetizing an austenitic workpiece before transport into a forming region (1.1, 2.1), in which austenite in the forming region is converted to ferrite and/or martensite by applying voltage and/or strain and by a combination of stretching train and a plane elongation, and subsequently moving the workpiece using a floating magnetic field. The workpiece is transported by a linear motor with a long stator. The forming region is located in an outer region of the workpiece, and forms a curvature of the workpiece. The forming region is provided as electrochemically inactive regions of a bipolar plate, and is coated with an electrochemically inactive coating.