Extraction, Distribution, and Precipitation Mechanism of TiN-MnS Complex Inclusions in Al-Killed Titanium Alloyed Interstitial Free Steel
Extraction, Distribution, and Precipitation Mechanism of TiN-MnS Complex Inclusions in Al-Killed Titanium Alloyed Interstitial Free Steel
复制标题
铝镇静钛合金无间隙钢中TiN-MnS复合夹杂物的提取、分布及析出机制
DOI：
10.1007/s12540-019-00521-x
复制
发表时间：
2021
影响因子：
3.5
通讯作者：
Yanping Bao
中科院分区：
文献类型：
--
作者：
Shuai Gao;Min Wang;Jianlong Guo;Hao Wang;Jianguo Zhi;Yanping Bao
采用电解水溶液法提取铝镇静钛合金化无间隙原子钢中的TiN-MnS复合夹杂物。采用扫描电镜能谱分析和自动扫描电镜分析了铸坯厚度方向上TiN-MnS夹杂物的尺寸和分布。结果表明，TiN-MnS复合夹杂物主要集中在铸坯内外表面的1/4厚度方向，铸坯中心的复合夹杂物尺寸约为8 μm。热力学分析表明，当凝固速率达到0.646-0.680时，TiN开始在δ相中析出，当凝固速率超过0.450时，MnS开始在γ相中析出。此外，在凝固过程中的晶体结构下研究了复合TiN-MnS的形成机理。图形摘要采用电解水溶液法从铸坯中提取铝镇静钛合金化无间隙原子钢中的TiN-MnS复合夹杂物。采用扫描电镜能谱分析和自动扫描电镜分析了铸坯厚度方向上TiN-MnS夹杂物的尺寸和分布。结果表明，TiN-MnS复合夹杂物主要集中在铸坯内外表面的1/4厚度方向，铸坯中心的复合夹杂物尺寸约为8 μm。由于原子（（100）TiN）的相似平面，||（100）MnS和[001]TiN|| [001]MnS）和TiN与MnS之间的半共格界面，一系列刃位错将为平行于界面的失配提供舒适的调节。
AbstractThe TiN–MnS complex inclusions in Al-killed titanium alloyed interstitial free steel were extracted from the slabs using an electrolytic aqueous solution method. Scanning electron microscopy with energy spectroscopy analysis and an automatic scanning electron microscope were employed to analyze the size and distribution of TiN–MnS inclusions in the thickness direction of the slab. It was found that TiN–MnS complex inclusions were primarily concentrated in the 1/4 thickness direction from the inner and outer surfaces, and the size of the complex inclusions in the slab center was approximately 8 μm. TiN began to precipitate when the solidification rate reached 0.646–0.680 in the δ phase, and MnS would appear in the γ phase when the solidification rate exceeded 0.450 through thermodynamic analysis. Also, the formation mechanism of the complex TiN–MnS was investigated under a crystal structure during solidification.Graphic AbstractThe TiN–MnS complex inclusions in Al-killed titanium alloyed interstitial free steel were extracted from the slabs using an electrolytic aqueous solution method. Scanning electron microscopy with energy spectroscopy analysis and an automatic scanning electron microscope were employed to analyze the size and distribution of TiN–MnS inclusions in the thickness direction of the slab. It was found that TiN–MnS complex inclusions were primarily concentrated in the 1/4 thickness direction from the inner and outer surfaces, and the size of the complex inclusions in the slab center was approximately 8 μm. Due to the similar plane of atoms ((100)TiN||(100)MnS and [001]TiN||[001]MnS) and a semi coherent interface between TiN and MnS, a series of edge dislocations would provide a comfortable accommodation for misfits parallel to the interface.