A. Nouri
,
H Saghafian
,
Sh Kheirandish
钢铁研究学报(英文版)
Steels of constant manganese and carbon contents with 0.34-2.26 wt. % silicon content were cast. The as-cast steels were then hot rolled at 1100°C in five passes to reduce the cast ingot thickness from 80 to 4 mm, air cooled to room temperature and cold rolled to 2 mm thickness. Dual-phase microstructures with different the volume fraction of martensite were obtained through the intercritical annealing of the steels at different temperatures for 15 min followed by water quenching. In addition of intercritical annealing temperature, silicon content also altered the volume fraction of martensite in dual-phase steels. The partitioning of manganese in dual-phase silicon steels were investigated using energy-dispersive X-ray spectrometry (EDS). The partitioning coefficient, defined as the ratio of the amounts of alloying element in the austenite to that in the adjacent ferrite, for manganese increased with increasing intercritical annealing temperature and silicon content of steels. It was also shown that the solubility of manganese in ferrite and austenite decreased with increasing intercritical temperature. The results were discussed by the diffusivity and the solubility of manganese in ferrite and austenite present in dual-phase silicon steels.
关键词:
Partitioning;Dual-phase steel;Intercritical annealing temperature;Silicon;Manganese
