Laws of the structure formation, as well as the strength properties and thermal stability of vacuum condensates of the Fe-W system have been studied. It has been found that the alloying of iron foils with tungsten to 1 at % makes it possible to disperse the grained structure of the condensates to nanometric dimensionality and to markedly enhance their strength properties and recrystallization temperature. Thus, the foils contain ing ~0.8% tungsten and grains of about 50 nm in size exhibit the hardness 5.5 GPa and recrystallization tem perature 800°C. These results can be used to devise compositions of the steels designed for subsequently obtaining high strength and thermostable nanostructural states.

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The process ofboronizing and borochromizing in a vibrofluidized bed is considered. It is shown that use of a vibrofluidized bed makes it possible to intensi~ considerably the processes of surface impregnation. Boronizing and borochromizing of high-alloy martensite and maraging steels are studied with the aim of increasing the wear resistance of the surface and obtaining a heat-resistant matrix.

Abstract-The structural changes that occur in a metastable austenitic Fe-Cr-Ni-based steel during cold plastic deformation by drawing and tension are analyzed. A relation between the structure of the steel and its mechanical and magnetic properties is established. It is concluded that the stress state scheme considerably affects the rate of martensite formation.