Dry strip drawing test on tool surfaces reinforced by hard particles

Abstract

Deep drawing high alloy steels often causes wear issues. It is assumed that in a deep drawing process without lubrica-tion this effect will be increased. To realize Dry Metal Forming, new tool surfaces are necessary to avoid wear. An approach is to use laser generated metal matrix composite (MMC) materials for tool surfaces. The surface is reinforced by hard particles to increase the wear resistance of the deep drawing tool. In this work the results of strip drawing test with and without lubrication of different tool surfaces are presented. In the case of lubricated strip drawing test, the friction coefficient did not differ if the tool surface is reinforced with hard particles or not. However, in a dry strip draw-ing test the friction coefficient is increased in the case of the MMC tool and applying normal pressure higher than 2.5 MPa. On the other hand, a significant increase of the wear resistance of the reinforced surface was observed within a dry ball-on-plate test.