Technical Paper
Influence of Micro Surface Structures of Nodular Cast Iron Crankshafts on Plain Bearing Wear
1988-02-01
880097
Passenger car engines have been equipped with cast crankshafts since 1950. However, their use as opposed to the steel counterparts does increase the wear rate of plain bearings. If the surface finishing operation carried out on nodular cast iron leaves an unsuitable surface texture, the bearing is likely to suffer extensive wear. Previous research examined the effect of different machining methods on the wear behaviour of three-layer high-strength bearings. Unfortunately, it did not prove possible to complete a thorough, systematic investigation of the effects of all the individual factors, even using sophisticated diesel engine tests, since the parameters concerned are too closely interrelated to be isolated. It was aimed at developing a straightforward and financially feasible test procedure to determine the wear mechanism operating in the semi-fluid friction region.
