Pillow Block UCP210 Cast Steel

The deformation failure of the bearing seat can be divided into two types: elastic deformation failure and plastic deformation failure. The former refers to the insufficient rigidity of the bearing seat and excessive elastic deformation during the working process, which affects the support and positioning functions of the bearing seat and causes abnormal operation of the engine rotor system; the latter refers to the occurrence of excessive plastic deformation. And cause the failure of bearing seat. According to the causes of plastic deformation of the bearing seat, there are two failure situations. One is due to insufficient strength of the bearing seat, causing the stress level under working conditions to exceed the yield strength of the bearing seat material; the other is due to the size of the bearing seat. Insufficient stability causes small irreversible changes in size or shape of parts in constant or non-constant environments.

The dimensional stability of parts is directly related to the micro-plastic deformation of the material. It is the main characteristic of the material performance of precision mechanical parts. It means that after heat treatment and processing, the part is not subject to external forces or is below the elastic limit under the working environment conditions. The ability to resist permanent deformation under the action of stress. It is generally believed that the insufficient dimensional stability of parts is caused by two factors: the instability of the phase and organizational state of the material and the excessive residual internal stress during the heat treatment and machining process of the blank.

If the part has a stable phase composition, the change in size is mainly related to the relaxation of internal stress; while for the part with a metastable structure, the change in size is the result of the combined effect of the two. At this time, the transformation of phase and structure is rapid. Strengthen the relaxation process of residual internal stress.