Development of Ultra-fine Grained Steel at Benxi Steel

The development of ultra-fine grain steels at Benxi Steel was introduced. CX400 and CX500 steels were developed based on carbon steel. Cu-P-Ti-RE and Cu-P-Cr-Ni series ultra-fine grain steels were developed based on weathering steel 09CuPTiRE and SPA-H. The results show that the chemical compositions and the rolling process parameters of ultra-fine grain steels are reasonable. The steels have ultra-fine grains and good properties. They are applied to manufacture automobile structures, railway vehicles and containers.