【摘要】：實驗鋼在傳統(tǒng)C-Mn鋼的基礎上添加低合金元素Ti,通過調(diào)整鋼中Mn元素含量,同時采用簡便的控制軋制與控制冷卻工藝,獲得了良好的組織形態(tài)及納米尺度析出物,從而在保證優(yōu)良延伸性能的前提下大幅度提高了鋼板的強度,顯著降低了鋼材成本。使用金相顯微鏡(OM)、掃描電子顯微鏡(SEM)和透射電子顯微鏡(TEM)對微觀組織進行觀察。結(jié)果表明:當實驗鋼Mn含量從1.05%(質(zhì)量分數(shù),下同)提高至1.5%,平均晶粒尺寸從6.4μm細化至5.2μm;基體中納米尺度TiC的析出量明顯增加;屈服強度、抗拉強度和斷后伸長率分別提高了56.7,42.2MPa和1.2%,達到了558.7,662.2MPa和22.4%。
[Abstract]:On the basis of traditional C-Mn steel, the low alloy element Ti, was added to the experimental steel. By adjusting the content of Mn elements in the steel and adopting a simple controlled rolling and controlled cooling process, good microstructure and nano-scale precipitates were obtained. Therefore, the strength of steel plate is greatly increased and the cost of steel is reduced significantly on the premise of good extension property. Microstructure was observed by (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that when the Mn content of the experimental steel is increased from 1.05% (mass fraction) to 1.5 渭 m, the average grain size is refined from 6.4 渭 m to 5.2 渭 m, and the precipitation amount of nano-scale TiC in the matrix increases obviously. The yield strength, tensile strength and elongation after break were increased by 56.7 MPA and 1.2 MPA, respectively, and reached 558.7662.2MPa and 22.4MPa respectively.
【作者單位】： 東北大學軋制技術及連軋自動化國家重點實驗室;
【基金】：國家科技支撐計劃項目(2011BAE25B03)
【分類號】：TG142.1;TG335

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本文編號：2311121