Roller bearing for dry running or medium lubricating applications, has bearing rings formed from rustproof steel and with roller bodies e.g. needle roller, held in cage, where roller bodies are made of corrosion resistant steel

摘要

The bearing (1) has bearing rings (2, 3) formed from rustproof steel and with roller body bearing surfaces (4, 5) and roller bodies (6) e.g. needle roller, held in a cage (7). The roller bodies are made of a corrosion resistant or heat resistant steel, and a diffusion layer is produced by enrichment of chromium, vanadium and boron in an edge layer in a thermochemical heat treatment method. A diffusion and connection layer has a partial covalent bond character to provide reduced inclination to a cold welding with one of the bearing surfaces that has a metallic bond character.