Research and Application of Carbon Free Bainite Wear Resistant Cast Steel

Alloying design of carbon-free bainite wear resistant cast steel was presented and the microstructure and properties of the steel after heat treatment were studied.The microstructure of carbon-free bainite wear resistant cast steel consists of bainite,ferrite and residual austenite after normalization and low temperature tempering,it belongs to non-typical bainite,carbon-free bainite or austenite-bainite mixed microstructure.While,the microstructure of carbon-free bainite wear resistant cast steel consists of martensite and residual austenite after quenching and low temperature tempering and it belongs to martensite-austenite mixed microstructure.The results show that the carbon-free bainite wear resistant cast steel has high strength and toughness,high wear resistance after normalizing or quenching and low temperature tempering,and low carbon-free bainite wear resistant cast steel has excellent welding property.Some application achievements in mining machinery were also introduced.