Roller with coating

A heatable roller for a machine for processing a web of material, the roller comprising:

• a main element having a heatable, metallic, cylindrical roller wall;
• a coating formed on a radially outer side of said roller wall, at least in sections thereof, for providing a web contact surface to be brought into contact with the web of material;
• said coating including at least one metallic or metal-carbidic layer, said at least one metallic or metal-carbidic layer including a first layer component providing a matrix and a second layer component distributed in said matrix;
• said second layer component comprising copper or a copper-based alloy;
• and
• said first layer component having a higher abrasion resistance than said second layer component and said second layer component having a greater thermal conductivity than said first layer component.

A process for coating a heatable roller of a machine for processing a web of material, the process comprising:

• providing a roller body with a heatable, metallic and cylindrical roller wall;
• and
• applying a coating to a radially outer side of the roller wall, the coating including at least one metallic or metal-carbidic layer, thereby applying the at least one metallic or metal-carbidic layer with a first layer component providing a matrix and a second layer component distributed in the matrix, the first layer component having a higher abrasion resistance than the second layer component and the second layer component having a greater thermal conductivity than the first layer component;
• forming the coating with 60% by weight or more of the first layer component and with not more than 40% by weight of the second layer component.