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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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.

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.