Vpliv toplotne obdelave na statično nosilnost kotalnega stika
The influence of heat treatment on static load carrying capacity of rolling contact

slovenian

1997

volume 31, issue 1/2

Narodna in univerzitetna knjižnica

Hardening of the rotational connection bearing raceway increases the resistance of the bearing against wear and impression of the rolling elements. The raceway is hardened using heat treatment locally, considering the technological process of the bearing ring manufacture. In this way the ring surface has a microstructure providing a high static carrying capacity of the rolling contact, and in the same time retaining the global elasticity and good machining properties of the rotational connection material. The microstructure analysis and carrying capacity of the rolling contact have been carried out on hardened bearing rings made of carbon and chrome-molybdenum alloyed steel. The results of the material analysis and carrying capacity measurements confirm the suitability of the use of induction hardening for the raceway hardening, and also show the possible errors that can emerge in the process. Hardening cracks, upper bainite, supercooled austenite, and excessively thin hardened layer decrease the carrying capacity of the raceway. The final breakdown of the raceway shows as surface cracks, and deep impressions of the hardened layer in the softer base material.

22.07.2011