Materials For Rolleing Contact Bearings
A rolling contact bearing consists of one or more rings and rolling elements (which directly support hte loads) and, usually , a cage which keeps the rolling elememts at equal intercals. Both rolling and sliding movents occur between these parts.
1. Bearings Ring And Rolling Elements
because of high, repetitive stress to the rolling contact areas, fatigue phenomenon will occur to the beraings maririal after a duration of operatuin. Loading stress ultimately dislodges a surface section and the beraing fails. To delay the advent of material fatigue, bearing ring and rolling element marieials should have the following properties:
o High Level of hardness
o High Rolling cintact fatigue resistance
o Good wear resistance
o Dimensional Stability
o Good Mechanical Strength
Standard beraing material for bearing rings and rolling elements is vacuum-degassed, high-carbon, chroame beraing steel.
For application requiring a higher degree of reliability, bearing steel using a vacuum-melting process or electroslaf solution (ESR)
In additon to the aobve, high-speed steel may be used for bearing for applications requiring tolerance to high temperatures.
