焊管2024，Vol.47Issue(11)：26-33,8.DOI:10.19291/j.cnki.1001-3938.2024.11.004
微量Mg添加对2.25Cr1Mo压力容器钢板奥氏体晶粒长大行为的影响
Effect of Trace Mg Addition on Austenite Grain Growth in 2.25Cr1Mo Pressure Vessel Steel Plate
摘要
Abstract
In order to reveal the effect of Mg addition on austenitic grain growth of low alloy steel,2.25Cr1Mo pressure vessel steel plate was used as the research object,and the hot rolled plate without Mg and with Mg was prepared by vacuum induction furnace and type 450 double-stick reversible rolling mill.The austenite grain growth behavior of the test steel was studied by optical microscopy and professional image software in the temperature range of 900～1 200℃,and the dynamical equations of austenite grain growth was analyzed by the mathematical regression.The results show that when heated at 900～1 000℃,Mg can refine the austenite grains.When heated at 1 100～1 200℃,Mg has no refining effect on austenite grains.Mathematical regression analysis shows that Mg addition can increase the activation energy of austenite grain growth,and hinder the austenite grain growth in the temperature range of 900～1 000℃.The retardation of austenite grain growth by Mg addition at lower temperature is related to the pinning effect of carbide segregation at grain boundaries or phase boundaries.As the solid solution Mg does not have the effect of pinning austenite grain growth at higher temperature,the austenite grain coarser obviously.关键词
2.25Cr1Mo钢/Mg/奥氏体/线性拟合/动力学Key words
2.25Cr1Mo steel/Mg/austenite/linear fitting/dynamics分类
矿业与冶金引用本文复制引用
潜坤,凌沛文,李小兵,鲍俊涛,裴科飞,陈玉宝,杨树斌..微量Mg添加对2.25Cr1Mo压力容器钢板奥氏体晶粒长大行为的影响[J].焊管,2024,47(11):26-33,8.基金项目
广东省市场监督管理局科技项目"埋地钢质管道杂散电流腐蚀规律研究及评价"(项目编号2023ZT02). （项目编号2023ZT02）
