Effect of TiN inclusions on the impact toughness of low-carbon microalloyed steels
文献类型：期刊论文
| 作者 | W. Yan ; Y. Y. Shan ; K. Yang |
| 刊名 | Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
 |
| 出版日期 | 2006 |
| 卷号 | 37A期号:7页码:2147-2158 |
| 关键词 | heat-affected zone cleavage fracture brittle-fracture forging steels initiation microstructure deformation titanium ferrite |
| ISSN号 | 1073-5623 |
| 中文摘要 | Microalloying with various elements, including titanium, coupled with thermomechanically controlled processing, has become a major technology for the manufacture of high-quality steel plate. In this research, the influence of TiN inclusions on the impact toughness of low-carbon plate steels microalloyed with titanium, vanadium, and boron was investigated. The three experimental steels had Ti/N ratios of 2.44, 3.5, and 4.2, and all three had a granular bainite microstructure. However, Charpy V-notch testing showed that steel A had very high toughness at both room temperature and -20 degrees C, whereas steels B and C showed very low toughness at -20 degrees C and moderate toughness at room temperature. Scanning electron microscope fractography revealed that coarse TiN inclusions had acted as cleavage fracture initiation sites in steels B and C. The effect of Ti and N levels on TiN formation and growth is analyzed using alloy thermodynamics. It is shown that not only is the Ti/N ratio important, but also the product of total Ti and N plays a most important role in TiN formation and growth. It is concluded that the product of the total Ti and N contents should not be greater than the solubility product of TiN at the solidus temperature to prevent the precipitation of TiN particles before solidification. Furthermore, the ratio of Ti to N should also be maintained lower than the stoichiometric ratio of 3.42 to ensure a low coarsening rate for the TiN inclusions during soaking before rolling. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/34635]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | W. Yan,Y. Y. Shan,K. Yang. Effect of TiN inclusions on the impact toughness of low-carbon microalloyed steels[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,2006,37A(7):2147-2158. |
| APA | W. Yan,Y. Y. Shan,&K. Yang.(2006).Effect of TiN inclusions on the impact toughness of low-carbon microalloyed steels.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,37A(7),2147-2158. |
| MLA | W. Yan,et al."Effect of TiN inclusions on the impact toughness of low-carbon microalloyed steels".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 37A.7(2006):2147-2158. |
入库方式： OAI收割
来源：金属研究所
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