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Cu Partitioning Behavior and Its Effect on Microstructure and Mechanical Properties of 0.12C-1.33Mn-0.55Cu Q&P Steel
Chen Liansheng; Hu Baojia; Xu Jinghui; Tian Yaqiang; Zheng Xiaoping; Song Jinying; Xu Yong; Tian, YQ (reprint author), North China Univ Sci & Technol, Hebei Key Lab Modern Met Technol, Tangshan 063009, Peoples R China.
2017-10-01
发表期刊JOURNAL WUHAN UNIV TECHNOLOGY
ISSN1000-2413
卷号32期号:5页码:1179-1185
摘要Cu, as an austenitic stable element, is added to steel in order to suppress the adverse effects of high content of C and Mn on welding. Based on C partitioning, Cu and Mn partitioning can further improve the stability of retained austenite in the intercritical annealing process. A sample of low carbon steel containing Cu was treated by the intercritical annealing, then quenching process (I&Q). Subsequently, another sample was treated by the intercritical annealing, subsequent austenitizing, then quenching and partitioning process (I&Q&P). The effects of element partitioning behavior in intercritical region on the microstructure and mechanical properties of the steel were studied. The results showed that after the I&Q process ferrite and martensite could be obtained, with C, Cu and Mn enriched in the martensite. When intercritically heated at 800 degrees C, Cu and Mn were partitioned from ferrite to austenite, which was enhanced gradually as the heating time was increased. This partitioning effect was the most obvious when the sample was heated at 800 degrees C for 40 min. At the early stage of alpha -> gamma transformation, the formation of. was controlled by the partitioning of carbon, while at the later stage, it was mainly affected by the partitioning of Cu and Mn. After the I&Q&P process, the partitioning effect of Cu and Mn element could be retained. C was assembled in retained austenite during the quenching and partitioning process. The strength and elongation of I&Q&P steel was increased by 5 305 MPa% compared with that subjected to Q&P process. The volume fraction of retained autensite was increased from 8.5% to 11.2%. Hence, the content of retained austenite could be improved significantly by Mn and Cu partitioning, which increased the elongation of steel.; Cu, as an austenitic stable element, is added to steel in order to suppress the adverse effects of high content of C and Mn on welding. Based on C partitioning, Cu and Mn partitioning can further improve the stability of retained austenite in the intercritical annealing process. A sample of low carbon steel containing Cu was treated by the intercritical annealing, then quenching process (I&Q). Subsequently, another sample was treated by the intercritical annealing, subsequent austenitizing, then quenching and partitioning process (I&Q&P). The effects of element partitioning behavior in intercritical region on the microstructure and mechanical properties of the steel were studied. The results showed that after the I&Q process ferrite and martensite could be obtained, with C, Cu and Mn enriched in the martensite. When intercritically heated at 800 degrees C, Cu and Mn were partitioned from ferrite to austenite, which was enhanced gradually as the heating time was increased. This partitioning effect was the most obvious when the sample was heated at 800 degrees C for 40 min. At the early stage of alpha -> gamma transformation, the formation of. was controlled by the partitioning of carbon, while at the later stage, it was mainly affected by the partitioning of Cu and Mn. After the I&Q&P process, the partitioning effect of Cu and Mn element could be retained. C was assembled in retained austenite during the quenching and partitioning process. The strength and elongation of I&Q&P steel was increased by 5 305 MPa% compared with that subjected to Q&P process. The volume fraction of retained autensite was increased from 8.5% to 11.2%. Hence, the content of retained austenite could be improved significantly by Mn and Cu partitioning, which increased the elongation of steel.
部门归属[chen liansheng ; hu baojia ; xu jinghui ; tian yaqiang ; zheng xiaoping ; song jinying] north china univ sci & technol, hebei key lab modern met technol, tangshan 063009, peoples r china ; [xu yong] chinese acad sci, inst met res, shenyang 110016, peoples r china
关键词Low Carbon High Strength Steel Intercritical Annealing Element Partitioning Behavior Retained Austenite Mechanical Properties
学科领域Materials Science, Multidisciplinary
资助者National Natural Science Foundation of China [51574107, 51304186]; Natural Science Foundation of Hebei Province [E2016209048, E2017209048]; Tangshan High Performance Metal and Composite Materials Science and Technical Innovation Team [15130202C]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79070
专题中国科学院金属研究所
通讯作者Tian, YQ (reprint author), North China Univ Sci & Technol, Hebei Key Lab Modern Met Technol, Tangshan 063009, Peoples R China.
推荐引用方式
GB/T 7714
Chen Liansheng,Hu Baojia,Xu Jinghui,et al. Cu Partitioning Behavior and Its Effect on Microstructure and Mechanical Properties of 0.12C-1.33Mn-0.55Cu Q&P Steel[J]. JOURNAL WUHAN UNIV TECHNOLOGY,2017,32(5):1179-1185.
APA Chen Liansheng.,Hu Baojia.,Xu Jinghui.,Tian Yaqiang.,Zheng Xiaoping.,...&Tian, YQ .(2017).Cu Partitioning Behavior and Its Effect on Microstructure and Mechanical Properties of 0.12C-1.33Mn-0.55Cu Q&P Steel.JOURNAL WUHAN UNIV TECHNOLOGY,32(5),1179-1185.
MLA Chen Liansheng,et al."Cu Partitioning Behavior and Its Effect on Microstructure and Mechanical Properties of 0.12C-1.33Mn-0.55Cu Q&P Steel".JOURNAL WUHAN UNIV TECHNOLOGY 32.5(2017):1179-1185.
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