For the fluctuation problem of mechanical properties of Ti-microalloyed high-strength steel strip,the steelmaking production process optimization and the research of different processes on the mechanical properties of hot-rolled low-alloy high-strength steel strip are performed.The steelmaking process was firstly to carry out Ti-microallying of molten steel at the argon blowing station,then to cast the molten steel at the continuous caster.In order to improve the cleanliness of the molten steel and the product quality,enhance the stability of the mechanical proper-ties,LF refining is introduced in the steelmaking process and the new process test is performed.The results show that after LF refining,the sulfur content in the steel is decreased from 0.010％to 0.005％approximately,the TiN particles is reduced to the size less than 10 μm,which can increase the longitudinal impact absorped energy value by 43 J and transversal impact aborped energy value by 38.9％for the Ti-microalloyed hot rolled high strength steel strip.The steel strip possesses good low temperature impact properies at 0 ℃ with stable mechanical properties.
关键词
Ti微合金化/低合金高强度/脱硫/冲击功/TiN
Key words
Ti-microalloying/Low alloy high-strength/Desulfurization/Impact absorbed energy value/TiN
维普
万方数据