Abstract
In order to meet the progressive requirement for the performance improvement of steel, the author proposed a novel microstructure featured with multi-phase, meta-stable and multi-scale (so-called as M3). And then, the new technologies could be developed to process three prototype steels with high performance: the third generation high strength low alloy (HSLA) steels with improved toughness and/or ductility (AKV(−40°C)⩾200 J and/or A⩾20% when Rp0.2 in 800–1000 MPa), the third generation advanced high strength steels (AHSS) (Rm×A⩾30 GPa% when Rm from 1000 MPa to 1500 MPa) for automobiles with improved ductility and low cost, and heat resistant martensitic steels with improved creep strength (σ10000650⩾90 MPa). It can be expected that the new technology developed will remarkably improve the safety and reliability of steel products in service for infrastructures, automobiles and fossil power station in the future.
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