Maximizing the Impregnated Oil Capacity of Sintered Bearings
Original Publication Date: 1985-Dec-01
Included in the Prior Art Database: 2005-Feb-19
Sintered iron or sintered bronze, impregnated with oil, is used as self-lubricating bearings in various applications. Because the oil content of the bearing components is pertinent to the life span of the components, the components are fabricated using a powder metallurgy process (P/M) that is effective in producing strong bonding between particles and interconnected pores to facilitate oil transport. The P/M process blends a powder mixture with a die lubricant, that is formed into the desired shape and then sintered. The amount of oil which can be impregnated is dependent upon the sintered structure (pore size, cracks etc.) as well as the wettability of the oil on the sintered particles. The wettability is dependent on the surface condition of the sintered powder. If the die lubricant (e.g.