In this work an attempt was made to find a relationship between the features of the hardfaced layer over 45 steel cylinders, and their fatigue properties. A model approach has been made in the paper to assess the effect of welding defects on fatigue durability of elements with a hardfaced surface layer. This approach in form of mathematical model has been verified with the results of experimental fatigue tests of specimens. An effect of weld metal mechanical properties upon the fatigue life and the fatigue strength has been described as well.
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