管线钢连铸板坯横截面元素的原位统计分布分析

发布时间：2019-08-14 17:18

【摘要】：管线钢作为石油、天然气等管道运输的主要材料,其元素分布及组织结构对管线钢强度和韧性有较大影响。实验采用原位统计分布分析技术对管线钢连铸板坯板宽中心到板宽1/4处的中心区域中C、Mn、P、S、V、Ti、Nb元素的偏析和分布状态进行了定量统计分析研究。采用最大偏析度、统计偏析度、统计均匀度等指标对各元素的偏析分布进行了定量表征。研究结果表明,C、Mn、P、S、V、Nb元素的偏析分布形式基本类似,都在板厚中心线附近和板宽1/4处的厚度方向存在由局部富集区域组成的带状偏析带。其中,C、P、S元素的偏析较为严重,统计偏析度达到20%以上。Ti元素没有观察到明显的偏析,在整个分析区域分布比较均匀。
[Abstract]:Pipeline steel is the main material for pipeline transportation such as oil and natural gas. Its element distribution and microstructure have great influence on the strength and toughness of pipeline steel. In situ statistical distribution analysis technique was used to quantitatively analyze the segregation and distribution of C, mn, P, V, Ti and NB elements in the center area from the width center of the continuous casting plate to the center of the plate width of 1: 4. The segregation distribution of each element was quantitatively characterized by maximum segregation degree and statistical uniformity. The results show that the segregation distribution of NB elements in C, mn, S, V and V is basically similar, and there are banded segregation zones composed of local enrichment regions near the central line of plate thickness and at the thickness direction of plate width 1 鈮，

本文编号：2526693