Nonuniform distribution of carbonitride particles and its effect on prior austenite grain size in the simulated coarse-grained heat-affected zone of thermomechanical control-processed steels

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	Nonuniform distribution of carbonitride particles and its effect on prior austenite grain size in the simulated coarse-grained heat-affected zone of thermomechanical control-processed steels
	D. W. Tian; L. P. Karjalainen; B. N. Qian; X. F. Chen
	1996
发表期刊	Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science
ISSN	1073-5623
卷号	27 期号:12 页码:4031-4038
摘要	The spatial distribution of carbonitride particles in the simulated coarse-grained heat-affected zone (HAZ) of Nb-Ti microalloyed thermomechanical control-processed (TMCP) steels was investigated using a scanning transmission electron microscope (STEM). It was found that the particles in quenched coarse-grained HAZ were frequently distributed in a nonuniform way, forming clusters and arrays of particles. This nonhomogeneity is defined by the grouping tendency of particles and described by the closeness of the average number density (the mean particle number per unit area) to the average local number density (the mean particle number per unit area, excluding the examined areas without particles). A high concentration of Nb (0.04 mass pet in this article) promoted the formation of carbonitride particle arrays and clusters because of its high segregation tendency at grain and subgrain boundaries during the cooling of a slab. Some of these particles remain undissolved at the peak temperature of a welding thermocycle and may result in sympathetic nucleation of new particles on them. The effectiveness of the particle groups to restrict grain growth is discussed.
部门归属	acad sinica,inst met res,shenyang 110015,peoples r china.;tian, dw (reprint author), univ oulu,dept engn mech,fin-90571 oulu,finland
关键词	Weld Thermal Cycles Microalloyed Steels Hsla Steels Growth Nb
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38408
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. W. Tian,L. P. Karjalainen,B. N. Qian,et al. Nonuniform distribution of carbonitride particles and its effect on prior austenite grain size in the simulated coarse-grained heat-affected zone of thermomechanical control-processed steels[J]. Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,1996,27(12):4031-4038.
APA	D. W. Tian,L. P. Karjalainen,B. N. Qian,&X. F. Chen.(1996).Nonuniform distribution of carbonitride particles and its effect on prior austenite grain size in the simulated coarse-grained heat-affected zone of thermomechanical control-processed steels.Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science,27(12),4031-4038.
MLA	D. W. Tian,et al."Nonuniform distribution of carbonitride particles and its effect on prior austenite grain size in the simulated coarse-grained heat-affected zone of thermomechanical control-processed steels".Metallurgical and Materials Transactions a-Physical Metallurgy and Materials Science 27.12(1996):4031-4038.