Abstract: A process for remelting metal surfaces, in particular, camshafts, using a laser. The invention shortens the cycle times and further increases cost-effectiveness by not requiring remelting in a plurality of steps. The process uses a laser beam which is focused to a rectangle. The length of the beam spot extends over the entire width of the workpiece surface of the cam. The power density and relative speed are set in order to achieve the desired remelting depth.

Abstract: A friction pairing of cam running surface/counterrunner layer as well as to a process for its production are described. To reduce the friction values, the counterrunner layer is a nanodisperse, amorphous, metal-carbon layer comprising 50 to 90 atomic % of carbon, 2 to 25 atomic % of hydrogen and any remainder of metal, the carbon being partly in the form of a diamond bond structure.

Abstract: A method for manufacturing a composite material by powder metallurgy wherein a starting material comprised of at least one body-centered cubic metal powder component, and contaminated by oxygen in its bulk or on its surface is mixed with a less noble supplemental component having a greater binding enthalpy for oxygen in powder form or as an alloy whereby the oxygen contaminant becomes bound to the supplemental component by internal solid-state reduction. The composite mixture is then deformed in at least one dimension to form ribbons or fibers thereof.