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Development of High Fatigue Strength for Powder-Forged Connecting Rods
ISSN: 1946-3979, e-ISSN: 1946-3987
Published April 14, 2008 by SAE International in United States
Citation: Takada, K., Kogure, R., Sato, M., and Takada, M., "Development of High Fatigue Strength for Powder-Forged Connecting Rods," SAE Int. J. Mater. Manf. 1(1):377-384, 2009, https://doi.org/10.4271/2008-01-0849.
Technology has been developed to increase the fatigue strength of powder-forged connecting rods.
The fatigue strength of powder-forged materials was increased without adding special alloy components or lowering workability by adjusting the ratios of the conventional main mixed powders (iron, carbon, copper). In addition to solid solution strengthening of the ferrite using copper, reducing porosity, which is a material surface defect, is also an effective method of increasing fatigue strength. Reducing carbon content greatly reduced the occurrence of defects in the forging stage.
The results of this research showed that the fatigue strength of high strength powder-forged connecting rods can be increased by 30% or more over that of conventional materials, allowing powder-forged connecting rods to be applied to even higher output and higher load engines than before.
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