【摘要】：實(shí)驗(yàn)鋼在傳統(tǒng)C-Mn鋼的基礎(chǔ)上添加低合金元素Ti,通過(guò)調(diào)整鋼中Mn元素含量,同時(shí)采用簡(jiǎn)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(qiáng)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(duì)微觀組織進(jìn)行觀察。結(jié)果表明:當(dāng)實(shí)驗(yàn)鋼Mn含量從1.05%(質(zhì)量分?jǐn)?shù),下同)提高至1.5%,平均晶粒尺寸從6.4μm細(xì)化至5.2μm;基體中納米尺度TiC的析出量明顯增加;屈服強(qiáng)度、抗拉強(qiáng)度和斷后伸長(zhǎng)率分別提高了56.7,42.2MPa和1.2%,達(dá)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(xué)軋制技術(shù)及連軋自動(dòng)化國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家科技支撐計(jì)劃項(xiàng)目(2011BAE25B03)
【分類號(hào)】：TG142.1;TG335

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本文編號(hào)：2311121