High-energy disintegration of powder charges (the method of mechanical alloying) in which the initial components interact at a higher substructural level than in conventional mixing provides qualitatively new powder materials with a high degree of homogeneity and dispersity of the structure. The possibilities of the given method for a radical improvement of the quality of low-alloy heat-treatable steels virtually have not been studied because of the absence of data on the special features of polymorphic transformations m mechanically alloyed powder materials based on iron. This hampers realization of the advantages of powder metallurgy over other less efficient technologies in the field of manufacturing high-strength structural parts. In order to substantiate the choice of heat-treatment regimes of mechanically alloyed materials, the authors of the present paper studied the special features of the isothermal 7 --~ ct transformation and the structure and properties of low-alloy sleds after sintering and heat treatment.
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