Study on Phosphorus Containing Low Manganese Steel
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摘要: 以低錳(≤ 2%)含磷鋼板為對象,探索在罩式爐進行的獲得雙相組織的周期退火工藝,并研究磷對周期退火后鋼板的組織和性能的影響,以提供適合我國冶企工業生產條件的抗拉強度 ≥ 540MPa,延伸率 ≥ 27%的含磷鋼板生產依據。實驗結果表明,含錳~2%,磷(0.1~0.13)%的鋼板,經680℃保溫8h,再在730℃保溫4h,隨爐以50℃/h速度冷卻至400℃后空冷的周期退火工藝退火,可以達到上述提出的性能要求,并且沖壓成型性能良好。Abstract: A cyclic annealing process of phosphorus containing low manganese steels plates in bell-type furnace, being aimed at dual phase microstructures, is studied. The influence of phosphorous on microstructures and mechanical properties of cyclicly annealed steel plates is investigated also, which provides good references for the production of P containing steel plate. The experimental results show that the steel plates containing -2% Mn and (0.1-0.13%) P, which are treated under a cyclic annealing process at 680℃ for 8h follwed by 730℃ for 4h, then furnace cooled to 400℃ and air cooled below 400℃ can meet the mechanical property requirement of T.S. L-540MPa, El.>27% and good drawing quality.
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Key words:
- dual phase steel /
- cyclic annealing /
- phosphorus containing steel
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