The Formation of the Structure and Tribological Properties of Composite Bronzes Reinforced with Steel Dendrites

Abstract

The possibility of creating of composite bronzes reinforced with steel dendrites from martensitic, austenitic and ferritic steels was considered. Compared to the BrO10 bronze widely used in the sliding friction units, bronze BRZHNA 12-7-1 has an increased complex of mechanical, technological and, especially, tribological properties. At comparable values of the friction coefficient, the wear resistance of bronze BRZHNA 12-7-1 is much higher. In contrast to the classic BrO10 bronze, composite bronze can be obtained in a hot-deformed state, welded, welded on steel and cast iron. The level of mechanical properties: σ0.2 = 220 MPa; σu = 295 MPa; ψ = 38% is 1.5-3 times higher than that of BrO10. The possibility of creating an industrial version of composite bronze with a particularly high level of tribological properties was proved for the first time at the laboratory level.