Composite material in the form of a band or sheet made of two steel cover plates that can be resistance-welded to one another and an intermediate layer made of a filler, process for its production and plant for carrying out the process

摘要

The invention relates to a composite material in the form of a strip or sheet made of two cover plates (1, 2) made of steel which can be resistance welded to one another via electrically conductive bodies (4) and an intermediate layer (3) made of a filler in which the bodies (4) are embedded , The bodies (4) designed as curved slugs lying flat between the cover plates (1, 2). The production of such a composite material takes place in such a way that the filler (3 ') for the intermediate layer in a paste-like state is applied in a continuous manner to a belt (1') serving as the first cover plate (1), and the bent slice discs (4 ') follow Placing on the filler (3 ') is pressed into the filler (3') via a band (2 ') fed as a second cover plate (2) in a weld gap (8) formed by two roller electrodes (6, 7) of a resistance welding device, and at least until contact is made and during welding the bands (1 ', 2') are largely flattened.