Abstract
The microstructure of tin additions, the bearing materials of solid lubricant additions, interface pressure and velocity were examined for their influence on the run-in of bronze-based oil-impregnated sintered bearings. The run-in-time increased in accordance with the increase in the apparent hardness. When the apparent hardness was equal, the run-in-time was shorter when it had obtained a more heterogeneous microstructure with some intermediate phase than a homogeneous Cu-Sn solid solution. Moreover, the solid lubricant content increased as the run-in-time decreased. When the interface pressure increased the run-in-time became shorter. On the other hand, when the velocity increased the run-in-time became shorter.
