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首页> 外文会议>Asia steel international conference >Micro-Structure Refinement in Low Carbon High Manganese Steels Through Ti-Deoxidation,Characterization and Effect of Secondary Deoxidation Particle(s)
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Micro-Structure Refinement in Low Carbon High Manganese Steels Through Ti-Deoxidation,Characterization and Effect of Secondary Deoxidation Particle(s)

机译：通过Ti脱氧，表征和二次脱氧颗粒的表征和效果的微结构细化

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摘要

This paper investigates the effect of de-oxidation inclusions on micro-structure in low carbon (0.07 mass％),high Mn (0.9 mass％) steel.De-oxidation tests were carried out by adding either aluminum (0.05 mass％) or titanium (0.05,0.03 or 0.015 mass％) to an iron melt in a 400 g-scale vacuum furnace.A Confocal Scanning Laser Microscope (CSLM) was used to evaluate the effect of cooling rate by re-melting and quenching during solidification.Fine secondary de-oxidation particles were obtained in the Ti-killed samples,and the particle density increased with increasing oxygen content,and their size decreased with increasing the cooling rate during solidification.The secondary Ti de-oxidation particles were found to have an effect on microstructure evolution,such as solidifying microstructure,austenite grain growth and austenite decomposition.The de-oxidation particles were examined through FE-TEM and were identified to be TiO,MnTiO3 and Mn2TiO4,in low oxygen ([O]=7ppm) and high oxygen ([O]=56,81ppm) Ti-killed steels respectively.The effect of the particles on ferrite formation was evaluated through thermo-mechanical treatments.TiO was the most effective for promoting ferrite formation through heterogeneous nucleation.The particles contributed to ferrite formation in the following order,TiO＞TiN＞MnS＞MnTiO3＞Ti2O3.
机译：本文研究了脱氧夹杂物对低碳（0.07质量％）的微结构的影响，通过加入铝（0.05质量％）或钛进行氧化试验。氧化试验（0.05,0.03或0.015质量％）到400g级真空炉中的铁熔体中的铁熔体。使用共聚焦扫描激光显微镜（CSLM）来评估冷却速度通过在凝固过程中再熔化和淬火的影响。次级在Ti杀死的样品中获得去氧化颗粒，颗粒密度随着氧含量的增加而增加，随着凝固过程中的冷却速率增加，它们的尺寸降低。发现次级Ti脱氧化颗粒对微观结构有影响求解微观结构，奥氏体晶粒生长和奥氏体分解等进化。通过Fe-TEM检查脱氧颗粒，并鉴定为TiO，MnTiO3和Mn2TiO4，低氧（[O] = 7ppm）和高氧气（ [o] = 56,81 PPM）分别杀死钢。通过热机械处理评价颗粒对铁氧体形成的影响.TiO是通过异质成核来促进铁氧体形成最有效的。颗粒以下列顺序有助于铁氧体形成，TiO>锡> MNS> MNTIO3> TI2O3。

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