title: [Segregation bands analysis of steel sample using laser-induced breakdown spectroscopy].
abstract: In the present paper, under optimum experimental condition, two middle-low alloy slab and homogeneous samples were analyzed under the condition of spatial resolution about 100 microm by scanning mode. Element 2D intensity distribution can be converted into 2D concentration distribution via establishing calibration curve. The results showed that there is a central segregation for C, Si, Mn, P, S and Cu for 86 # slab sample, and C, Si, P and Ti for 174 # slab sample, the width of segregation band was estimated, and it agrees well with metallographic analysis. Homogeneous sample was analyzed by scanning mode, the result showed that C, Si, Mn, P, S and so on are well distributed, and there is no segregation band existing. 2D distribution of element intensity or concentration can be used to indirectly reflect sample's homogeneity. Compared with traditional metallographic analysis, LIBS can not only show central segregation bands position and width, but also provide 2D concentration distribution for C, Si, Mn, P, S etc in detail. This method can be used to characterize segregation band position and its width rapidly, and provide theoretical guidance for improving metallurgical process.
authors.affiliation: Central Iron & Steel Research Institute, Beijing 100081, China. chauchylan@163.com
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Central Iron & Steel Research Institute, Beijing 100081, China.
authors.forename: Yun-Hai
authors.initials: YH
authors.lastname: Jia
authors.affiliation: Central Iron & Steel Research Institute, Beijing 100081, China.
authors.forename: Ji-Wen
authors.initials: JW
authors.lastname: Chen
authors.affiliation: Central Iron & Steel Research Institute, Beijing 100081, China.
authors.forename: Xue-Jing
authors.initials: XJ
authors.lastname: Shen
authors.affiliation: Central Iron & Steel Research Institute, Beijing 100081, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhao
authors.affiliation: Central Iron & Steel Research Institute, Beijing 100081, China.
authors.forename: Dong-Ling
authors.initials: DL
authors.lastname: Li
authors.affiliation: General Research Institute for Nonferrous Metals, Beijing, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Central Iron & Steel Research Institute, Beijing 100081, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Yang
authors.affiliation: NCS Testing Technology Co, Ltd, Beijing 100094, China.
authors.forename: Peng-Cheng
authors.initials: PC
authors.lastname: Hang
authors.affiliation: Central Iron & Steel Research Institute, Beijing 100081, China.
authors.forename: Hai-zhou
authors.initials: HZ
authors.lastname: Wang