本文關(guān)鍵詞： 晶內(nèi)鐵素體 球形夾雜物 形核模型 正三棱錐形　出處：《材料工程》2017年07期 　論文類型：期刊論文

【摘要】：通過(guò)建立晶內(nèi)鐵素體形核模型,結(jié)合數(shù)學(xué)推導(dǎo)發(fā)現(xiàn),基底相為不規(guī)則形狀的夾雜物比基底相為球形夾雜物形核功小,易誘導(dǎo)鐵素體形核。根據(jù)數(shù)學(xué)模型分析球形夾雜物誘導(dǎo)晶內(nèi)鐵素體形核的影響因素。結(jié)果表明:夾雜物尺寸過(guò)小時(shí)不利于誘導(dǎo)晶內(nèi)鐵素體形核,其尺寸增加到0.15μm后,對(duì)鐵素體的形核影響反而不大;夾雜物與鋼液的潤(rùn)濕角越小,越易誘導(dǎo)鐵素體形核;夾雜物與鋼液的潤(rùn)濕角為70°~90°時(shí),球形夾雜物易誘導(dǎo)正三棱錐形鐵素體析出,而潤(rùn)濕角小于70°時(shí),易誘導(dǎo)球形鐵素體析出;析出相為正三棱錐形鐵素體形核模型的形核率比析出相為球形鐵素體模型的形核率高。通過(guò)實(shí)驗(yàn)驗(yàn)證了不規(guī)則夾雜物可以誘導(dǎo)鐵素體形核,且夾雜物尺寸大于0.15μm后,對(duì)鐵素體的形核影響不大。
[Abstract]:By establishing the model of ferrite nucleation in crystal and combining with mathematical derivation, it is found that the inclusion with irregular base phase is less than that with spherical inclusion with substrate phase. It is easy to induce ferrite nucleation. According to the mathematical model, the influence factors of intracrystalline ferrite nucleation induced by spherical inclusions are analyzed. The results show that the inclusion size is too small to induce intracrystalline ferrite nucleation. When the size of ferrite was increased to 0.15 渭 m, the nucleation of ferrite was not affected. The smaller the wetting angle between inclusions and molten steel is, the easier it is to induce ferrite nucleation. When the wetting angle between inclusions and molten steel is 70 擄~ 90 擄, spherical inclusions are apt to induce the precipitation of normal triangular pyramidal ferrite, while when the wetting angle is less than 70 擄, spherical ferrite precipitates easily. The nucleation rate of the precipitated phase is higher than that of the spherical ferrite model. The experimental results show that irregular inclusions can induce the nucleation of ferrite. When the size of inclusions is greater than 0.15 渭 m, the nucleation of ferrite has little effect.
【作者單位】： 華北理工大學(xué)冶金與能源學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51474089)
【分類號(hào)】：TG142.1
【正文快照】： 晶內(nèi)鐵素體(Intra-Granular　Ferrite,IGF)最早發(fā)現(xiàn)于低碳微合金化高強(qiáng)度鋼的焊接組織中,其形核主要是由一定尺寸的夾雜物誘導(dǎo)產(chǎn)生的。晶內(nèi)鐵素體的產(chǎn)生改善了組織,細(xì)化了晶粒,提高了鋼的強(qiáng)韌性和抗斷裂性,其研究和應(yīng)用對(duì)象主要是低碳微合金焊接鋼和管線鋼[1,2]。近年來(lái),人們，

本文編號(hào)：1490783