SA-182 F92吹氮合金化的应用研究

Application Research on Blowing Nitrogen Alloying of SA-182 F92

在吹氮合金化增氮热力学和动力学理论分析的基础上,进行了钛渣电炉副产品半钢冶炼F92吹氮合金化技术的应用研究,提出了LF精炼、VD处理、补吹氮气进行氮合金化的生产工艺控制条件。研究表明:钢液经LF精炼过程中吹氮气增氮,VD续吹氮气、减压析氮处理后,净化效果显著;F92钢中氮含量能稳定控制在目标成分380×10^(-6)～450×10^(-6)范围内,纯净度高,无缺陷,完全满足ASME SA-182/SA-182M-2010标准要求。

Based on the theoretical analysis of thermodynamics and kinetics of adding nitrogen by blowing nitrogen, application study of F92 blowing nitrogen alloying technology had been carried out by using titanium slag furnace as a byproduct of liquid semisteel smelting, and then blowing nitrogen alloying process control conditions for LF refining, VD treatment,and supplementary blowing nitrogen had been proposed. The purification effect was significant after nitrogen adding by blowing nitrogen during LF refining process, VD continued blowing nitrogen and decompression nitrogen release treatment. The nitrogen content in the F92 steel can be stabilized in the target composition of 380×10^-6~450×10^-6 ,with high clea liness and no defect in bloom, which fully meets the requirements of ASME SA-182/SA-182M-2010.