example regions can be produced in which partially a purely ledeburitic microstructure without free carbon is present and adjacent regions which only have a hardened microstructure but still have free carbon in the form of graphite the regions with graphite can bring about an improved thermal conductivity in addition the running characteristics can be thereby improved the surface quality of the remelted zone can lie for example at a surface roughness r 2 of less than 20 mm in alternative embodiments a residual amount of free graphite can also be present in the ledeburitic microstructure region in addition carbide forming elements can also already be added into the grey cast iron in the base material such carbide forming elements are for example cr v si mo or w then in the remelting process further carbides can occur additionally to the iron carbide such as for instance cr 2 c 3 sic vc or wc which influence the hardness characteristics of the surface in a further positive manner for example mo up to 17 by weight preferably 0 5 to 5 by weight si up to 4 5 by weight w up to 5 by weight preferably 0 3 1 5 by weight v up to 2 by weight and or up to 30 by weight cr can be contained in the base material one or more different carbide forming elements can be contained in the material in any desired suitable combination likewise self lubricating substances can be supplemented in the base material such as for instance graphite hexagonal boron nitride mo 2 s or other suitable substances here also individual substances or a combination thereof can.