Al对稀土处理C-Mn钢连续冷却组织转变的影响

发布时间：2018-04-18 09:13

  本文选题：C-Mn钢 + 稀土　； 参考：《钢铁研究学报》2017年10期

【摘要】：研究Al预脱氧对Ce处理钢夹杂物和显微组织的影响,利用热力学计算、带能谱的扫描电镜和DIL805A热膨胀仪检测进行了对比研究。得到如下结论:Ce处理后钢中的主要夹杂物从MnS转变为Ce2O2S+MnS,Al脱氧能使Ce处理钢中夹杂物转变为CeAlO3+Ce2S3+MnS。Ce处理C-Mn钢连续冷却过程有利于获得晶内铁素体的冷速为2~8℃/s。Al脱氧能改变诱导晶内铁素体形核的核心夹杂物种类,诱导铁素体形核的能力降低,且Al能够使Ce处理钢连续冷却组织转变(CCT)曲线向左上方移动,促进铁素体在晶界形核,不利于Ce处理后晶内铁素体的形成。Al脱氧Ce处理C-Mn钢在冷速为2~5℃/s时,由于夹杂物核心成分的改变与Al合金化作用导致晶内铁素体含量较未用Al脱氧Ce处理钢少。
[Abstract]:The effect of Al predeoxidation on the inclusion and microstructure of ce treated steel was studied. The thermodynamics calculation, scanning electron microscope with energy dispersive spectrum and DIL805A thermal expansion instrument were used to compare and study the effect of Al predeoxidation on the inclusion and microstructure of ce treated steel.It is concluded that the main inclusions in the steel treated with: ce can deoxidize from MnS to Ce2O2S MNS Al so that the inclusion in ce treated steel can be transformed into CeAlO3 Ce2S3 MnS.Ce treatment C-Mn steel during continuous cooling process, and the cooling rate of ferrite in crystal can be obtained at 2? 8 鈩，

本文编号：1767718