Research on microstructure and properties of 900 MPa grade low-carbon bainite high strength steel
The controlled rolling and controlled cooling experiments of low-carbon bainite high strength steel were carried out,and the microstructure analysis and the mechanical property test of the rolled plate were also carried out.The results showed that the microstructure of the steel was mainly granular bainite and lath bainite.The tensile strength of the steel was high,and reached 900 MPa.The elongation after fracture was 20.8％.The impact energy reached 172 J.The hardness was 325 HV.The trial steel had good plasticity and toughness.
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