Lalazarova N. Effect of High-Strength Cast Iron Inhomogeneity on its Machinability.

3. Subject of research - mutual tie of structural and chemical inhomogeneity with machinability. The purpose of research - discovering of high-strength cast iron inhomogeneity and influence on the machinability. Improving high-strength casiron spheroidal graphite cast iron machinability based on the complex cast iron characteristic - the inhomogeneity factor. Methods of research - optical and electron microscopy, Method method measuring of microhardness and cutting force momentary magnitudes.Theoretical and practical outcomes- - examine possibl criterions of machinability and its dependence from properties. Based on the the researches proposes ccharacteristic characteristic which reflect peculiarity of structur cast iron (its inhomogeneity) and determined the machinability. The work зкщзщсуы propoces optimization heat treatment, method of machinability estimation, recommendations have been elaboration as to the cutting procedures for cast iron with predetermined properties and consequently, with defini te inhomogeneity factor. recommendation The recommendation as to the cutting procedures for cast iron has been introduced to practice of Kharkov's motorbuilding plant. Sphere of application - machine building plants.