Influence of the microstructure dispersion on the tribological properties of composite bronzes reinforced with steel dendrites

Abstract

The possibility of creating composite bronze reinforced with martensitic and austenitic-ferritic stainless steel dendrites is considered. Compared to BrSn10 bronze, widely used in sliding friction pairs, BrFe12Ni7Al, BrFe12Ni7Cr5Si bronzes have a high complex of mechanical, technological and particularly tribological properties. For similar values of the coefficient of friction, the wear resistance of bronze BrFe12Ni7Al is a higher order. Unlike the classic bronze BrSn10, composite bronzes can be obtained in hot deformed state, deposited on steel and cast iron. The level of mechanical properties: σ0.2 = 220 MPa; σВ = 295 MPa; ψ = 38% is 1.5 to 3 times higher than that of the BrSn10. At the laboratory level for the first time the possibility of creating an industrial variant of composite steel with a particularly high level of tribological properties is based. © 2019 Latin American and Caribbean Consortium of Engineering Institutions. All rights reserved.