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Results of studies of novel composite antifriction bronzes reinforced with dendrites represented by steels of different classes i.e., maragingμ, austenitic and stainless ones, are presented. The principle of creation of such materials and the chemical compositions of the developed composite bronzes are described. Their structures, mechanical properties, and heat treatment modes are characterized. It is shown that copper is highly soluble in iron (≥ 20 wt.%). The wear resistance of bronze BrZhNKhK 12-7-5-1 under sliding friction is shown to be five times higher than that of the classical bronze BrO10; after dispersing, the figure is ≥ 10 times. [ABSTRACT FROM AUTHOR]

Three composite bronzes reinforced with steel dendrites from steels of different classes, which perform the function of a bearing surface in sliding friction, are studied. The chemical compositions of the dendrites and of the matrix are determined as a function of the heat treatment of bronze BrZhNOA 12-7-2-1. The fine structure of dendrites in bronze BrZhNKoA 9-4-1-1 is studied and the effect of the aging temperature in the intermetallic reinforcement of the dendrite with composition corresponding to maraging steel N23Yu1 is determined. The type of the crystal lattice of the dendrite is shown to affect substantially the tribological properties of bronze BrZhNKhA 12-9-3-1. [ABSTRACT FROM AUTHOR]