Abstract: A roller body for a roller for treating a material, preferably a web material, which is cast from an iron base alloy which forms a radially interior zone (5) of the roller body (1) made of grey cast iron (GJS, GJV) and, around the interior zone (5), a circumferential rim zone (6) which includes the outer circumference of the roller body (1) and exhibits a surface hardness which is greater than 400 HV, wherein the circumferential rim zone (6) consists of ribbon grain or superfine ribbon grain pearlite (P) with embedded free graphite, preferably spheroidal graphite (SG) or vermicular graphite (V), or of an intermediate structure (ADI) with spheroidal graphite or vermicular graphite.

Abstract: A roller for thermal pressure treatment of web-type media such as paper or non-wovens, provided with an inner heating system and comprising a base body made of hardened and tempered wrought steel or alloyed cast iron, an intermediate layer applied to the surface thereof and a hard wearing layer applied thereon. Peripheral bores or canals extending parallel to the axis are arranged in the base body of the roller at a regular distance from the surface, being distributed in a regular manner on the circle formed about the roller axis. The materials used and the arrangement of the peripheral bores are such that the roller can be used in calanders in a method wherein the surface temperatures of the roller exceed 140° C., the heating capacity is more than 35 kW/m2, operational speeds are more than 1200 m/min, line pressures are greater than 250 kN/m and the processed webs of material weigh more than 45 g/m2 and have a degree of moisture of over 5%.

Abstract: A cast body, being a tool for forming or original molding a work piece, or a transfer member for transferring a force or torque onto a tool which contacts the work piece during forming or original molding, wherein the cast body is cast from an iron base alloy which forms an interior zone of the cast body made of grey cast iron and, around the interior zone, a circumferential rim zone which includes the outer circumference of the cast body and has a surface hardness which is greater than 400 HV, wherein the circumferential rim zone consists of ribbon grain or superfine ribbon grain pearlite with embedded free graphite, preferably spheroidal graphite or vermicular graphite, or of an intermediate structure with spheroidal graphite or vermicular graphite.

Abstract: A roller body for a roller for treating a material, preferably a web material, which is cast from an iron base alloy which forms a radially interior zone (5) of the roller body (1) made of grey cast iron (GJS, GJV) and, around the interior zone (5), a circumferential rim zone (6) which includes the outer circumference of the roller body (1) and exhibits a surface hardness which is greater than 400 HV, wherein the circumferential rim zone (6) consists of ribbon grain or superfine ribbon grain pearlite (P) with embedded free graphite, preferably spheroidal graphite (SG) or vermicular graphite (V), or of an intermediate structure (ADI) with spheroidal graphite or vermicular graphite.

Abstract: A roller body for treating a web-shaped material, comprising a shell and profiles which are arranged on an inner circumferential area of the shell, distributed about a rotational axis of the roller body, and together with the shell form channels for a thermal treatment fluid which extend at least substantially axially The shell forms an outer wall and the profiles form side walls of the channels respectively The side walls are each connected to the shell by means of a connecting seam produced by a material fit; and the side walls of immediately adjacent profiles exhibit an inclination of less than 90° to the shell in their cross-section up to the connecting seam such that they point away from each other from the connecting seam outwards.

Abstract: A metal casting molded body comprising at least one effective surface for machining or processing a material and formed from a compound material, wherein said compound material comprises at least one porous hard material body in a casting matrix made of a metallic casting material, said casting material being seeped into said hard material body.

Abstract: The present invention relates to a roller for the thermomechanical treatment of a web-shaped medium, the roller including: a roller body; axial bores for a thermal treatment fluid which are incorporated in roller body near to an outer surface of the roller body and into which the thermal treatment fluid flows on an inflow side; inflow zones, formed on the inflow side in the upstream ends of the bores or in feed channels through which the thermal treatment fluid flows into the bores; and directing or guiding portions provided in the inflow zones, which transfer a rotational movement of the roller onto the thermal treatment fluid, the directing portions at least substantially completely transfer the rotational movement onto the thermal treatment fluid and in this way suppress a relative swirl between the bores and the thermal treatment fluid, while still in the inflow zones.