摘要
Abstract
In this article, it took high-Nb X80 pipeline steel as research object to analyze the size, morphology and distribution characteristics of M/A islands. The results showed that increasing cooling rate can make M/A islands become more fine and uniform, and the shape tends to be round or globular, it is in favour to improve the mechanical properties of pipeline steel. Under the same cooling rate, increasing Nb content can improve M/A islands forming, it explained high Nb content to promote M/A islands transformation from the dot, block to strip. The adverse effects on steel properties of the M/A islands can be reduced when the composition and cooling rate are adjusted.关键词
高Nb钢/X80管线钢/M/A岛/合金成分/冷却速度Key words
high Nb steel/X80 pipeline steel/M/A islands/alloy composition/cooling rate分类
矿业与冶金
