METHOD FOR DETERMINING THE STRENGTH CHARACTERISTICS AND GRAIN SIZE OF METAL materials and alloys

摘要

A method of determining the strength characteristics and grain size in metallic materials and alloys comprising manufacturing the preform, its heating, deformation, cooling, determining the resulting stress-strain state and the distribution of the resulting grain size, characterized in that, for experimental investigations made for at least two workpieces wedge-shaped and after heating to various temperatures produce deformation of each blank by longitudinal rolling, starting from the narrow end, and cooling e produced at different cooling rates for the formation of different strength characteristics and grain size, each preform is separated by at least two samples is determined by metallographic investigations of grain size, strength testing mechanical characteristics of each sample, which depend on the nature of the sample material, temperature during deformation and cooling rates and develop a mathematical model in which the combined results of experimental studies and calculations n stresses and strain state of the test pieces.