A roller bearing which has a roller bearing ring. In order to produce a roller bearing that has a high rotational speed value and operational load using minimum quantity lubrication and in which heat produced in the bearing can be removed in a rapid and reliable manner, the roller bearing ring is made of a material composite. The first material composite component forms the running surface and is made of a refractory metal or a sintering material. The thermal conductivity and heat resistance first material composite component is higher than the thermal conductivity and heat resistance of at least one additional material composite component which forms the base body of the roller bearing ring.
1. A roller bearing, comprising:
a roller bearing ring, which is composed of a material composite that includes a first material composite component, which forms a running track and at least one further material composite component, which forms a base body of the roller bearing ring,
the first material composite component is composed of a first refractory metal or a sintered material that has a thermal conductivity and a heat resistance which are higher than a thermal conductivity and a heat resistance of the at least one further material composite component which is formed from a second refractory metal.
2. The roller bearing as claimed in claim 1 , wherein the first material composite component contains molybdenum or tungsten as a main component.
3. The roller bearing as claimed in claim 1 , wherein the first material composite component is composed of cobalt-sintered and/or nickel-sintered carbides.
4. The roller bearing as claimed in claim 1 , wherein the second refractory metal of the base body is based on molybdenum.
5. The roller bearing as claimed in claim 1 , wherein the roller bearing has roller bodies and the roller bodies are formed from ceramic materials.
6. The roller bearing as claimed in claim 1 , wherein the roller bearing has a roller body cage and the roller body cage is made of siliconized CFC.