Structural strength of aluminum-containing steels in constructions of large-dimension nitrided internal gears
In the article it is considered the scientific and practical aspects of structural strength of modern large-dimension internal gears made of steel, containing aluminum up to 2 %. Calculated dependences required for production of gears for planetary gearbox are specified. The results of bench and operation tests of largedimension gears made of generally known and new aluminum-containing steels are provided. Guidelines for application of steels, ensuring accident-free operation of gears at long-distance running of auto vehicles are given. The achieved solutions are grounded on the phenomenon of segregation (concentration), studied for the first time, and interaction of alloying and impurity elements on the boundary and near-border zone of grain volumes, forming grain boundary dislocation, as well as strength and technological properties of structural steels.